Import Mesa 9.2.0

7 files changed, 4270 insertions, 0 deletions

diff --git a/dist/Mesa/src/mesa/swrast/s_chan.h b/dist/Mesa/src/mesa/swrast/s_chan.h
new file mode 100644
index 000000000..38daf6575
--- /dev/null
+++ b/dist/Mesa/src/mesa/swrast/s_chan.h
@@ -0,0 +1,128 @@
+/*
+ * Mesa 3-D graphics library
+ *
+ * Copyright (C) 2011  VMware, Inc.  All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/**
+ * Types, macros, etc for the GLchan datatype.
+ * The swrast module is kind of hard-coded for 8bpp color channels but
+ * may be recompiled to use 16- or 32-bit color channels.  But that
+ * feature is seldom used and is likely broken in various ways.
+ */
+
+#ifndef U_CHAN_H
+#define U_CHAN_H
+
+
+#include "main/config.h"
+
+
+/**
+ * Default bits per color channel:  8, 16 or 32
+ */
+#ifndef CHAN_BITS
+#define CHAN_BITS 8
+#endif
+
+
+/**
+ * Color channel data type.
+ */
+#if CHAN_BITS == 8
+   typedef GLubyte GLchan;
+#define CHAN_MAX 255
+#define CHAN_MAXF 255.0F
+#define CHAN_TYPE GL_UNSIGNED_BYTE
+#elif CHAN_BITS == 16
+   typedef GLushort GLchan;
+#define CHAN_MAX 65535
+#define CHAN_MAXF 65535.0F
+#define CHAN_TYPE GL_UNSIGNED_SHORT
+#elif CHAN_BITS == 32
+   typedef GLfloat GLchan;
+#define CHAN_MAX 1.0
+#define CHAN_MAXF 1.0F
+#define CHAN_TYPE GL_FLOAT
+#else
+#error "illegal number of color channel bits"
+#endif
+
+
+#if CHAN_BITS == 8
+
+#define CHAN_TO_UBYTE(c)  (c)
+#define CHAN_TO_USHORT(c) (((c) << 8) | (c))
+#define CHAN_TO_SHORT(c)  (((c) << 7) | ((c) >> 1))
+#define CHAN_TO_FLOAT(c)  UBYTE_TO_FLOAT(c)
+
+#define CLAMPED_FLOAT_TO_CHAN(c, f)    CLAMPED_FLOAT_TO_UBYTE(c, f)
+#define UNCLAMPED_FLOAT_TO_CHAN(c, f)  UNCLAMPED_FLOAT_TO_UBYTE(c, f)
+
+#define COPY_CHAN4(DST, SRC)  COPY_4UBV(DST, SRC)
+
+#elif CHAN_BITS == 16
+
+#define CHAN_TO_UBYTE(c)  ((c) >> 8)
+#define CHAN_TO_USHORT(c) (c)
+#define CHAN_TO_SHORT(c)  ((c) >> 1)
+#define CHAN_TO_FLOAT(c)  ((GLfloat) ((c) * (1.0 / CHAN_MAXF)))
+
+#define CLAMPED_FLOAT_TO_CHAN(c, f)    CLAMPED_FLOAT_TO_USHORT(c, f)
+#define UNCLAMPED_FLOAT_TO_CHAN(c, f)  UNCLAMPED_FLOAT_TO_USHORT(c, f)
+
+#define COPY_CHAN4(DST, SRC)  COPY_4V(DST, SRC)
+
+#elif CHAN_BITS == 32
+
+#define CHAN_TO_UBYTE(c)  FLOAT_TO_UBYTE(c)
+#define CHAN_TO_USHORT(c) ((GLushort) (CLAMP((c), 0.0f, 1.0f) * 65535.0))
+#define CHAN_TO_SHORT(c)  ((GLshort) (CLAMP((c), 0.0f, 1.0f) * 32767.0))
+#define CHAN_TO_FLOAT(c)  (c)
+
+#define CLAMPED_FLOAT_TO_CHAN(c, f)  c = (f)
+#define UNCLAMPED_FLOAT_TO_CHAN(c, f)      c = (f)
+
+#define COPY_CHAN4(DST, SRC)  COPY_4V(DST, SRC)
+
+#else
+
+#error unexpected CHAN_BITS size
+
+#endif
+
+
+/**
+ * Convert 4 floats to GLchan values.
+ * \param dst pointer to destination GLchan[4] array.
+ * \param f pointer to source GLfloat[4] array.
+ */
+#define UNCLAMPED_FLOAT_TO_RGBA_CHAN(dst, f)	\
+do {						\
+   UNCLAMPED_FLOAT_TO_CHAN((dst)[0], (f)[0]);	\
+   UNCLAMPED_FLOAT_TO_CHAN((dst)[1], (f)[1]);	\
+   UNCLAMPED_FLOAT_TO_CHAN((dst)[2], (f)[2]);	\
+   UNCLAMPED_FLOAT_TO_CHAN((dst)[3], (f)[3]);	\
+} while (0)
+
+
+
+#endif /* U_CHAN_H */
diff --git a/dist/Mesa/src/mesa/swrast/s_renderbuffer.c b/dist/Mesa/src/mesa/swrast/s_renderbuffer.c
new file mode 100644
index 000000000..e3f33de7d
--- /dev/null
+++ b/dist/Mesa/src/mesa/swrast/s_renderbuffer.c
@@ -0,0 +1,693 @@
+/*
+ * Mesa 3-D graphics library
+ *
+ * Copyright (C) 1999-2006  Brian Paul   All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/**
+ * Functions for allocating/managing software-based renderbuffers.
+ * Also, routines for reading/writing software-based renderbuffer data as
+ * ubytes, ushorts, uints, etc.
+ */
+
+
+#include "main/glheader.h"
+#include "main/imports.h"
+#include "main/context.h"
+#include "main/fbobject.h"
+#include "main/formats.h"
+#include "main/mtypes.h"
+#include "main/renderbuffer.h"
+#include "swrast/s_context.h"
+#include "swrast/s_renderbuffer.h"
+
+
+/**
+ * This is a software fallback for the gl_renderbuffer->AllocStorage
+ * function.
+ * Device drivers will typically override this function for the buffers
+ * which it manages (typically color buffers, Z and stencil).
+ * Other buffers (like software accumulation and aux buffers) which the driver
+ * doesn't manage can be handled with this function.
+ *
+ * This one multi-purpose function can allocate stencil, depth, accum, color
+ * or color-index buffers!
+ */
+static GLboolean
+soft_renderbuffer_storage(struct gl_context *ctx, struct gl_renderbuffer *rb,
+                          GLenum internalFormat,
+                          GLuint width, GLuint height)
+{
+   struct swrast_renderbuffer *srb = swrast_renderbuffer(rb);
+   GLuint bpp;
+
+   switch (internalFormat) {
+   case GL_RGB:
+   case GL_R3_G3_B2:
+   case GL_RGB4:
+   case GL_RGB5:
+   case GL_RGB8:
+   case GL_RGB10:
+   case GL_RGB12:
+   case GL_RGB16:
+      rb->Format = MESA_FORMAT_RGB888;
+      break;
+   case GL_RGBA:
+   case GL_RGBA2:
+   case GL_RGBA4:
+   case GL_RGB5_A1:
+   case GL_RGBA8:
+#if 1
+   case GL_RGB10_A2:
+   case GL_RGBA12:
+#endif
+      if (_mesa_little_endian())
+         rb->Format = MESA_FORMAT_RGBA8888_REV;
+      else
+         rb->Format = MESA_FORMAT_RGBA8888;
+      break;
+   case GL_RGBA16:
+   case GL_RGBA16_SNORM:
+      /* for accum buffer */
+      rb->Format = MESA_FORMAT_SIGNED_RGBA_16;
+      break;
+   case GL_STENCIL_INDEX:
+   case GL_STENCIL_INDEX1_EXT:
+   case GL_STENCIL_INDEX4_EXT:
+   case GL_STENCIL_INDEX8_EXT:
+   case GL_STENCIL_INDEX16_EXT:
+      rb->Format = MESA_FORMAT_S8;
+      break;
+   case GL_DEPTH_COMPONENT:
+   case GL_DEPTH_COMPONENT16:
+      rb->Format = MESA_FORMAT_Z16;
+      break;
+   case GL_DEPTH_COMPONENT24:
+      rb->Format = MESA_FORMAT_X8_Z24;
+      break;
+   case GL_DEPTH_COMPONENT32:
+      rb->Format = MESA_FORMAT_Z32;
+      break;
+   case GL_DEPTH_STENCIL_EXT:
+   case GL_DEPTH24_STENCIL8_EXT:
+      rb->Format = MESA_FORMAT_Z24_S8;
+      break;
+   default:
+      /* unsupported format */
+      return GL_FALSE;
+   }
+
+   bpp = _mesa_get_format_bytes(rb->Format);
+
+   /* free old buffer storage */
+   free(srb->Buffer);
+   srb->Buffer = NULL;
+
+   srb->RowStride = width * bpp;
+
+   if (width > 0 && height > 0) {
+      /* allocate new buffer storage */
+      srb->Buffer = malloc(srb->RowStride * height);
+
+      if (srb->Buffer == NULL) {
+         rb->Width = 0;
+         rb->Height = 0;
+         _mesa_error(ctx, GL_OUT_OF_MEMORY,
+                     "software renderbuffer allocation (%d x %d x %d)",
+                     width, height, bpp);
+         return GL_FALSE;
+      }
+   }
+
+   rb->Width = width;
+   rb->Height = height;
+   rb->_BaseFormat = _mesa_base_fbo_format(ctx, internalFormat);
+
+   if (rb->Name == 0 &&
+       internalFormat == GL_RGBA16_SNORM &&
+       rb->_BaseFormat == 0) {
+      /* NOTE: This is a special case just for accumulation buffers.
+       * This is a very limited use case- there's no snorm texturing or
+       * rendering going on.
+       */
+      rb->_BaseFormat = GL_RGBA;
+   }
+   else {
+      /* the internalFormat should have been error checked long ago */
+      ASSERT(rb->_BaseFormat);
+   }
+
+   return GL_TRUE;
+}
+
+
+/**
+ * Called via gl_renderbuffer::Delete()
+ */
+static void
+soft_renderbuffer_delete(struct gl_context *ctx, struct gl_renderbuffer *rb)
+{
+   struct swrast_renderbuffer *srb = swrast_renderbuffer(rb);
+
+   free(srb->Buffer);
+   srb->Buffer = NULL;
+   _mesa_delete_renderbuffer(ctx, rb);
+}
+
+
+void
+_swrast_map_soft_renderbuffer(struct gl_context *ctx,
+                              struct gl_renderbuffer *rb,
+                              GLuint x, GLuint y, GLuint w, GLuint h,
+                              GLbitfield mode,
+                              GLubyte **out_map,
+                              GLint *out_stride)
+{
+   struct swrast_renderbuffer *srb = swrast_renderbuffer(rb);
+   GLubyte *map = srb->Buffer;
+   int cpp = _mesa_get_format_bytes(rb->Format);
+   int stride = rb->Width * cpp;
+
+   if (!map) {
+      *out_map = NULL;
+      *out_stride = 0;
+   }
+
+   map += y * stride;
+   map += x * cpp;
+
+   *out_map = map;
+   *out_stride = stride;
+}
+
+
+void
+_swrast_unmap_soft_renderbuffer(struct gl_context *ctx,
+                                struct gl_renderbuffer *rb)
+{
+}
+
+
+
+/**
+ * Allocate a software-based renderbuffer.  This is called via the
+ * ctx->Driver.NewRenderbuffer() function when the user creates a new
+ * renderbuffer.
+ * This would not be used for hardware-based renderbuffers.
+ */
+struct gl_renderbuffer *
+_swrast_new_soft_renderbuffer(struct gl_context *ctx, GLuint name)
+{
+   struct swrast_renderbuffer *srb = CALLOC_STRUCT(swrast_renderbuffer);
+   if (srb) {
+      _mesa_init_renderbuffer(&srb->Base, name);
+      srb->Base.AllocStorage = soft_renderbuffer_storage;
+      srb->Base.Delete = soft_renderbuffer_delete;
+   }
+   return &srb->Base;
+}
+
+
+/**
+ * Add software-based color renderbuffers to the given framebuffer.
+ * This is a helper routine for device drivers when creating a
+ * window system framebuffer (not a user-created render/framebuffer).
+ * Once this function is called, you can basically forget about this
+ * renderbuffer; core Mesa will handle all the buffer management and
+ * rendering!
+ */
+static GLboolean
+add_color_renderbuffers(struct gl_context *ctx, struct gl_framebuffer *fb,
+                        GLuint rgbBits, GLuint alphaBits,
+                        GLboolean frontLeft, GLboolean backLeft,
+                        GLboolean frontRight, GLboolean backRight)
+{
+   gl_buffer_index b;
+
+   if (rgbBits > 16 || alphaBits > 16) {
+      _mesa_problem(ctx,
+                    "Unsupported bit depth in add_color_renderbuffers");
+      return GL_FALSE;
+   }
+
+   assert(MAX_COLOR_ATTACHMENTS >= 4);
+
+   for (b = BUFFER_FRONT_LEFT; b <= BUFFER_BACK_RIGHT; b++) {
+      struct gl_renderbuffer *rb;
+
+      if (b == BUFFER_FRONT_LEFT && !frontLeft)
+         continue;
+      else if (b == BUFFER_BACK_LEFT && !backLeft)
+         continue;
+      else if (b == BUFFER_FRONT_RIGHT && !frontRight)
+         continue;
+      else if (b == BUFFER_BACK_RIGHT && !backRight)
+         continue;
+
+      assert(fb->Attachment[b].Renderbuffer == NULL);
+
+      rb = ctx->Driver.NewRenderbuffer(ctx, 0);
+      if (!rb) {
+         _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating color buffer");
+         return GL_FALSE;
+      }
+
+      rb->InternalFormat = GL_RGBA;
+
+      rb->AllocStorage = soft_renderbuffer_storage;
+      _mesa_add_renderbuffer(fb, b, rb);
+   }
+
+   return GL_TRUE;
+}
+
+
+/**
+ * Add a software-based depth renderbuffer to the given framebuffer.
+ * This is a helper routine for device drivers when creating a
+ * window system framebuffer (not a user-created render/framebuffer).
+ * Once this function is called, you can basically forget about this
+ * renderbuffer; core Mesa will handle all the buffer management and
+ * rendering!
+ */
+static GLboolean
+add_depth_renderbuffer(struct gl_context *ctx, struct gl_framebuffer *fb,
+                       GLuint depthBits)
+{
+   struct gl_renderbuffer *rb;
+
+   if (depthBits > 32) {
+      _mesa_problem(ctx,
+                    "Unsupported depthBits in add_depth_renderbuffer");
+      return GL_FALSE;
+   }
+
+   assert(fb->Attachment[BUFFER_DEPTH].Renderbuffer == NULL);
+
+   rb = _swrast_new_soft_renderbuffer(ctx, 0);
+   if (!rb) {
+      _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating depth buffer");
+      return GL_FALSE;
+   }
+
+   if (depthBits <= 16) {
+      rb->InternalFormat = GL_DEPTH_COMPONENT16;
+   }
+   else if (depthBits <= 24) {
+      rb->InternalFormat = GL_DEPTH_COMPONENT24;
+   }
+   else {
+      rb->InternalFormat = GL_DEPTH_COMPONENT32;
+   }
+
+   rb->AllocStorage = soft_renderbuffer_storage;
+   _mesa_add_renderbuffer(fb, BUFFER_DEPTH, rb);
+
+   return GL_TRUE;
+}
+
+
+/**
+ * Add a software-based stencil renderbuffer to the given framebuffer.
+ * This is a helper routine for device drivers when creating a
+ * window system framebuffer (not a user-created render/framebuffer).
+ * Once this function is called, you can basically forget about this
+ * renderbuffer; core Mesa will handle all the buffer management and
+ * rendering!
+ */
+static GLboolean
+add_stencil_renderbuffer(struct gl_context *ctx, struct gl_framebuffer *fb,
+                         GLuint stencilBits)
+{
+   struct gl_renderbuffer *rb;
+
+   if (stencilBits > 16) {
+      _mesa_problem(ctx,
+                  "Unsupported stencilBits in add_stencil_renderbuffer");
+      return GL_FALSE;
+   }
+
+   assert(fb->Attachment[BUFFER_STENCIL].Renderbuffer == NULL);
+
+   rb = _swrast_new_soft_renderbuffer(ctx, 0);
+   if (!rb) {
+      _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating stencil buffer");
+      return GL_FALSE;
+   }
+
+   assert(stencilBits <= 8);
+   rb->InternalFormat = GL_STENCIL_INDEX8;
+
+   rb->AllocStorage = soft_renderbuffer_storage;
+   _mesa_add_renderbuffer(fb, BUFFER_STENCIL, rb);
+
+   return GL_TRUE;
+}
+
+
+static GLboolean
+add_depth_stencil_renderbuffer(struct gl_context *ctx,
+                               struct gl_framebuffer *fb)
+{
+   struct gl_renderbuffer *rb;
+
+   assert(fb->Attachment[BUFFER_DEPTH].Renderbuffer == NULL);
+   assert(fb->Attachment[BUFFER_STENCIL].Renderbuffer == NULL);
+
+   rb = _swrast_new_soft_renderbuffer(ctx, 0);
+   if (!rb) {
+      _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating depth+stencil buffer");
+      return GL_FALSE;
+   }
+
+   rb->InternalFormat = GL_DEPTH_STENCIL;
+
+   rb->AllocStorage = soft_renderbuffer_storage;
+   _mesa_add_renderbuffer(fb, BUFFER_DEPTH, rb);
+   _mesa_add_renderbuffer(fb, BUFFER_STENCIL, rb);
+
+   return GL_TRUE;
+}
+
+
+/**
+ * Add a software-based accumulation renderbuffer to the given framebuffer.
+ * This is a helper routine for device drivers when creating a
+ * window system framebuffer (not a user-created render/framebuffer).
+ * Once this function is called, you can basically forget about this
+ * renderbuffer; core Mesa will handle all the buffer management and
+ * rendering!
+ */
+static GLboolean
+add_accum_renderbuffer(struct gl_context *ctx, struct gl_framebuffer *fb,
+                       GLuint redBits, GLuint greenBits,
+                       GLuint blueBits, GLuint alphaBits)
+{
+   struct gl_renderbuffer *rb;
+
+   if (redBits > 16 || greenBits > 16 || blueBits > 16 || alphaBits > 16) {
+      _mesa_problem(ctx,
+                    "Unsupported accumBits in add_accum_renderbuffer");
+      return GL_FALSE;
+   }
+
+   assert(fb->Attachment[BUFFER_ACCUM].Renderbuffer == NULL);
+
+   rb = _swrast_new_soft_renderbuffer(ctx, 0);
+   if (!rb) {
+      _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating accum buffer");
+      return GL_FALSE;
+   }
+
+   rb->InternalFormat = GL_RGBA16_SNORM;
+   rb->AllocStorage = soft_renderbuffer_storage;
+   _mesa_add_renderbuffer(fb, BUFFER_ACCUM, rb);
+
+   return GL_TRUE;
+}
+
+
+
+/**
+ * Add a software-based aux renderbuffer to the given framebuffer.
+ * This is a helper routine for device drivers when creating a
+ * window system framebuffer (not a user-created render/framebuffer).
+ * Once this function is called, you can basically forget about this
+ * renderbuffer; core Mesa will handle all the buffer management and
+ * rendering!
+ *
+ * NOTE: color-index aux buffers not supported.
+ */
+static GLboolean
+add_aux_renderbuffers(struct gl_context *ctx, struct gl_framebuffer *fb,
+                      GLuint colorBits, GLuint numBuffers)
+{
+   GLuint i;
+
+   if (colorBits > 16) {
+      _mesa_problem(ctx,
+                    "Unsupported colorBits in add_aux_renderbuffers");
+      return GL_FALSE;
+   }
+
+   assert(numBuffers <= MAX_AUX_BUFFERS);
+
+   for (i = 0; i < numBuffers; i++) {
+      struct gl_renderbuffer *rb = _swrast_new_soft_renderbuffer(ctx, 0);
+
+      assert(fb->Attachment[BUFFER_AUX0 + i].Renderbuffer == NULL);
+
+      if (!rb) {
+         _mesa_error(ctx, GL_OUT_OF_MEMORY, "Allocating aux buffer");
+         return GL_FALSE;
+      }
+
+      assert (colorBits <= 8);
+      rb->InternalFormat = GL_RGBA;
+
+      rb->AllocStorage = soft_renderbuffer_storage;
+      _mesa_add_renderbuffer(fb, BUFFER_AUX0 + i, rb);
+   }
+   return GL_TRUE;
+}
+
+
+/**
+ * Create/attach software-based renderbuffers to the given framebuffer.
+ * This is a helper routine for device drivers.  Drivers can just as well
+ * call the individual _mesa_add_*_renderbuffer() routines directly.
+ */
+void
+_swrast_add_soft_renderbuffers(struct gl_framebuffer *fb,
+                               GLboolean color,
+                               GLboolean depth,
+                               GLboolean stencil,
+                               GLboolean accum,
+                               GLboolean alpha,
+                               GLboolean aux)
+{
+   GLboolean frontLeft = GL_TRUE;
+   GLboolean backLeft = fb->Visual.doubleBufferMode;
+   GLboolean frontRight = fb->Visual.stereoMode;
+   GLboolean backRight = fb->Visual.stereoMode && fb->Visual.doubleBufferMode;
+
+   if (color) {
+      assert(fb->Visual.redBits == fb->Visual.greenBits);
+      assert(fb->Visual.redBits == fb->Visual.blueBits);
+      add_color_renderbuffers(NULL, fb,
+                              fb->Visual.redBits,
+                              fb->Visual.alphaBits,
+                              frontLeft, backLeft,
+                              frontRight, backRight);
+   }
+
+#if 0
+   /* This is pretty much for debugging purposes only since there's a perf
+    * hit for using combined depth/stencil in swrast.
+    */
+   if (depth && fb->Visual.depthBits == 24 &&
+       stencil && fb->Visual.stencilBits == 8) {
+      /* use combined depth/stencil buffer */
+      add_depth_stencil_renderbuffer(NULL, fb);
+   }
+   else
+#else
+   (void) add_depth_stencil_renderbuffer;
+#endif
+   {
+      if (depth) {
+         assert(fb->Visual.depthBits > 0);
+         add_depth_renderbuffer(NULL, fb, fb->Visual.depthBits);
+      }
+
+      if (stencil) {
+         assert(fb->Visual.stencilBits > 0);
+         add_stencil_renderbuffer(NULL, fb, fb->Visual.stencilBits);
+      }
+   }
+
+   if (accum) {
+      assert(fb->Visual.accumRedBits > 0);
+      assert(fb->Visual.accumGreenBits > 0);
+      assert(fb->Visual.accumBlueBits > 0);
+      add_accum_renderbuffer(NULL, fb,
+                             fb->Visual.accumRedBits,
+                             fb->Visual.accumGreenBits,
+                             fb->Visual.accumBlueBits,
+                             fb->Visual.accumAlphaBits);
+   }
+
+   if (aux) {
+      assert(fb->Visual.numAuxBuffers > 0);
+      add_aux_renderbuffers(NULL, fb, fb->Visual.redBits,
+                            fb->Visual.numAuxBuffers);
+   }
+
+#if 0
+   if (multisample) {
+      /* maybe someday */
+   }
+#endif
+}
+
+
+
+static void
+map_attachment(struct gl_context *ctx,
+                 struct gl_framebuffer *fb,
+                 gl_buffer_index buffer)
+{
+   struct gl_texture_object *texObj = fb->Attachment[buffer].Texture;
+   struct gl_renderbuffer *rb = fb->Attachment[buffer].Renderbuffer;
+   struct swrast_renderbuffer *srb = swrast_renderbuffer(rb);
+
+   if (texObj) {
+      /* map texture image (render to texture) */
+      const GLuint level = fb->Attachment[buffer].TextureLevel;
+      const GLuint face = fb->Attachment[buffer].CubeMapFace;
+      const GLuint slice = fb->Attachment[buffer].Zoffset;
+      struct gl_texture_image *texImage = texObj->Image[face][level];
+      if (texImage) {
+         ctx->Driver.MapTextureImage(ctx, texImage, slice,
+                                     0, 0, texImage->Width, texImage->Height,
+                                     GL_MAP_READ_BIT | GL_MAP_WRITE_BIT,
+                                     &srb->Map, &srb->RowStride);
+      }
+   }
+   else if (rb) {
+      /* Map ordinary renderbuffer */
+      ctx->Driver.MapRenderbuffer(ctx, rb,
+                                  0, 0, rb->Width, rb->Height,
+                                  GL_MAP_READ_BIT | GL_MAP_WRITE_BIT,
+                                  &srb->Map, &srb->RowStride);
+   }
+
+   assert(srb->Map);
+}
+ 
+
+static void
+unmap_attachment(struct gl_context *ctx,
+                   struct gl_framebuffer *fb,
+                   gl_buffer_index buffer)
+{
+   struct gl_texture_object *texObj = fb->Attachment[buffer].Texture;
+   struct gl_renderbuffer *rb = fb->Attachment[buffer].Renderbuffer;
+   struct swrast_renderbuffer *srb = swrast_renderbuffer(rb);
+
+   if (texObj) {
+      /* unmap texture image (render to texture) */
+      const GLuint level = fb->Attachment[buffer].TextureLevel;
+      const GLuint face = fb->Attachment[buffer].CubeMapFace;
+      const GLuint slice = fb->Attachment[buffer].Zoffset;
+      struct gl_texture_image *texImage = texObj->Image[face][level];
+      if (texImage) {
+         ctx->Driver.UnmapTextureImage(ctx, texImage, slice);
+      }
+   }
+   else if (rb) {
+      /* unmap ordinary renderbuffer */
+      ctx->Driver.UnmapRenderbuffer(ctx, rb);
+   }
+
+   srb->Map = NULL;
+}
+
+
+/**
+ * Determine what type to use (ubyte vs. float) for span colors for the
+ * given renderbuffer.
+ * See also _swrast_write_rgba_span().
+ */
+static void
+find_renderbuffer_colortype(struct gl_renderbuffer *rb)
+{
+   struct swrast_renderbuffer *srb = swrast_renderbuffer(rb);
+   GLuint rbMaxBits = _mesa_get_format_max_bits(rb->Format);
+   GLenum rbDatatype = _mesa_get_format_datatype(rb->Format);
+
+   if (rbDatatype == GL_UNSIGNED_NORMALIZED && rbMaxBits <= 8) {
+      /* the buffer's values fit in GLubyte values */
+      srb->ColorType = GL_UNSIGNED_BYTE;
+   }
+   else {
+      /* use floats otherwise */
+      srb->ColorType = GL_FLOAT;
+   }
+}
+
+
+/**
+ * Map the renderbuffers we'll use for tri/line/point rendering.
+ */
+void
+_swrast_map_renderbuffers(struct gl_context *ctx)
+{
+   struct gl_framebuffer *fb = ctx->DrawBuffer;
+   struct gl_renderbuffer *depthRb, *stencilRb;
+   GLuint buf;
+
+   depthRb = fb->Attachment[BUFFER_DEPTH].Renderbuffer;
+   if (depthRb) {
+      /* map depth buffer */
+      map_attachment(ctx, fb, BUFFER_DEPTH);
+   }
+
+   stencilRb = fb->Attachment[BUFFER_STENCIL].Renderbuffer;
+   if (stencilRb && stencilRb != depthRb) {
+      /* map stencil buffer */
+      map_attachment(ctx, fb, BUFFER_STENCIL);
+   }
+
+   for (buf = 0; buf < fb->_NumColorDrawBuffers; buf++) {
+      map_attachment(ctx, fb, fb->_ColorDrawBufferIndexes[buf]);
+      find_renderbuffer_colortype(fb->_ColorDrawBuffers[buf]);
+   }
+}
+ 
+ 
+/**
+ * Unmap renderbuffers after rendering.
+ */
+void
+_swrast_unmap_renderbuffers(struct gl_context *ctx)
+{
+   struct gl_framebuffer *fb = ctx->DrawBuffer;
+   struct gl_renderbuffer *depthRb, *stencilRb;
+   GLuint buf;
+
+   depthRb = fb->Attachment[BUFFER_DEPTH].Renderbuffer;
+   if (depthRb) {
+      /* map depth buffer */
+      unmap_attachment(ctx, fb, BUFFER_DEPTH);
+   }
+
+   stencilRb = fb->Attachment[BUFFER_STENCIL].Renderbuffer;
+   if (stencilRb && stencilRb != depthRb) {
+      /* map stencil buffer */
+      unmap_attachment(ctx, fb, BUFFER_STENCIL);
+   }
+
+   for (buf = 0; buf < fb->_NumColorDrawBuffers; buf++) {
+      unmap_attachment(ctx, fb, fb->_ColorDrawBufferIndexes[buf]);
+   }
+}
diff --git a/dist/Mesa/src/mesa/swrast/s_renderbuffer.h b/dist/Mesa/src/mesa/swrast/s_renderbuffer.h
new file mode 100644
index 000000000..2595d7c17
--- /dev/null
+++ b/dist/Mesa/src/mesa/swrast/s_renderbuffer.h
@@ -0,0 +1,66 @@
+/*
+ * Mesa 3-D graphics library
+ *
+ * Copyright (C) 1999-2005  Brian Paul   All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#ifndef S_RENDERBUFFER_H
+#define S_RENDERBUFFER_H
+
+#include "main/glheader.h"
+
+
+struct gl_context;
+struct gl_framebuffer;
+struct gl_renderbuffer;
+
+
+extern struct gl_renderbuffer *
+_swrast_new_soft_renderbuffer(struct gl_context *ctx, GLuint name);
+
+extern void
+_swrast_map_soft_renderbuffer(struct gl_context *ctx,
+                              struct gl_renderbuffer *rb,
+                              GLuint x, GLuint y, GLuint w, GLuint h,
+                              GLbitfield mode,
+                              GLubyte **out_map,
+                              GLint *out_stride);
+
+extern void
+_swrast_unmap_soft_renderbuffer(struct gl_context *ctx,
+                                struct gl_renderbuffer *rb);
+
+extern void
+_swrast_set_renderbuffer_accessors(struct gl_renderbuffer *rb);
+
+
+extern void
+_swrast_add_soft_renderbuffers(struct gl_framebuffer *fb,
+                               GLboolean color,
+                               GLboolean depth,
+                               GLboolean stencil,
+                               GLboolean accum,
+                               GLboolean alpha,
+                               GLboolean aux);
+
+
+#endif /* S_RENDERBUFFER_H */
diff --git a/dist/Mesa/src/mesa/swrast/s_texfetch.c b/dist/Mesa/src/mesa/swrast/s_texfetch.c
new file mode 100644
index 000000000..0196aede1
--- /dev/null
+++ b/dist/Mesa/src/mesa/swrast/s_texfetch.c
@@ -0,0 +1,1361 @@
+/*
+ * Mesa 3-D graphics library
+ *
+ * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
+ * Copyright (c) 2009  VMware, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/**
+ * \file s_texfetch.c
+ *
+ * Texel fetch/store functions
+ *
+ * \author Gareth Hughes
+ */
+
+
+#include "main/colormac.h"
+#include "main/macros.h"
+#include "main/texcompress.h"
+#include "main/texcompress_fxt1.h"
+#include "main/texcompress_s3tc.h"
+#include "main/texcompress_rgtc.h"
+#include "main/texcompress_etc.h"
+#include "main/teximage.h"
+#include "main/samplerobj.h"
+#include "s_context.h"
+#include "s_texfetch.h"
+#include "../../gallium/auxiliary/util/u_format_rgb9e5.h"
+#include "../../gallium/auxiliary/util/u_format_r11g11b10f.h"
+
+
+/**
+ * Convert an 8-bit sRGB value from non-linear space to a
+ * linear RGB value in [0, 1].
+ * Implemented with a 256-entry lookup table.
+ */
+static inline GLfloat
+nonlinear_to_linear(GLubyte cs8)
+{
+   static GLfloat table[256];
+   static GLboolean tableReady = GL_FALSE;
+   if (!tableReady) {
+      /* compute lookup table now */
+      GLuint i;
+      for (i = 0; i < 256; i++) {
+         const GLfloat cs = UBYTE_TO_FLOAT(i);
+         if (cs <= 0.04045) {
+            table[i] = cs / 12.92f;
+         }
+         else {
+            table[i] = (GLfloat) pow((cs + 0.055) / 1.055, 2.4);
+         }
+      }
+      tableReady = GL_TRUE;
+   }
+   return table[cs8];
+}
+
+
+
+/* Texel fetch routines for all supported formats
+ */
+#define DIM 1
+#include "s_texfetch_tmp.h"
+
+#define DIM 2
+#include "s_texfetch_tmp.h"
+
+#define DIM 3
+#include "s_texfetch_tmp.h"
+
+
+/**
+ * All compressed texture texel fetching is done though this function.
+ * Basically just call a core-Mesa texel fetch function.
+ */
+static void
+fetch_compressed(const struct swrast_texture_image *swImage,
+                 GLint i, GLint j, GLint k, GLfloat *texel)
+{
+   /* The FetchCompressedTexel function takes an integer pixel rowstride,
+    * while the image's rowstride is bytes per row of blocks.
+    */
+   GLuint bw, bh;
+   GLuint texelBytes = _mesa_get_format_bytes(swImage->Base.TexFormat);
+   _mesa_get_format_block_size(swImage->Base.TexFormat, &bw, &bh);
+   assert(swImage->RowStride * bw % texelBytes == 0);
+
+   swImage->FetchCompressedTexel(swImage->ImageSlices[k],
+                                 swImage->RowStride * bw / texelBytes,
+                                 i, j, texel);
+}
+
+
+
+/**
+ * Null texel fetch function.
+ *
+ * Have to have this so the FetchTexel function pointer is never NULL.
+ */
+static void fetch_null_texelf( const struct swrast_texture_image *texImage,
+                               GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   (void) texImage; (void) i; (void) j; (void) k;
+   texel[RCOMP] = 0.0;
+   texel[GCOMP] = 0.0;
+   texel[BCOMP] = 0.0;
+   texel[ACOMP] = 0.0;
+   _mesa_warning(NULL, "fetch_null_texelf() called!");
+}
+
+
+/**
+ * Table to map MESA_FORMAT_ to texel fetch/store funcs.
+ * XXX this is somewhat temporary.
+ */
+static struct {
+   gl_format Name;
+   FetchTexelFunc Fetch1D;
+   FetchTexelFunc Fetch2D;
+   FetchTexelFunc Fetch3D;
+}
+texfetch_funcs[] =
+{
+   {
+      MESA_FORMAT_NONE,
+      fetch_null_texelf,
+      fetch_null_texelf,
+      fetch_null_texelf
+   },
+
+   {
+      MESA_FORMAT_RGBA8888,
+      fetch_texel_1d_f_rgba8888,
+      fetch_texel_2d_f_rgba8888,
+      fetch_texel_3d_f_rgba8888
+   },
+   {
+      MESA_FORMAT_RGBA8888_REV,
+      fetch_texel_1d_f_rgba8888_rev,
+      fetch_texel_2d_f_rgba8888_rev,
+      fetch_texel_3d_f_rgba8888_rev
+   },
+   {
+      MESA_FORMAT_ARGB8888,
+      fetch_texel_1d_f_argb8888,
+      fetch_texel_2d_f_argb8888,
+      fetch_texel_3d_f_argb8888
+   },
+   {
+      MESA_FORMAT_ARGB8888_REV,
+      fetch_texel_1d_f_argb8888_rev,
+      fetch_texel_2d_f_argb8888_rev,
+      fetch_texel_3d_f_argb8888_rev
+   },
+   {
+      MESA_FORMAT_RGBX8888,
+      fetch_texel_1d_f_rgbx8888,
+      fetch_texel_2d_f_rgbx8888,
+      fetch_texel_3d_f_rgbx8888
+   },
+   {
+      MESA_FORMAT_RGBX8888_REV,
+      fetch_texel_1d_f_rgbx8888_rev,
+      fetch_texel_2d_f_rgbx8888_rev,
+      fetch_texel_3d_f_rgbx8888_rev
+   },
+   {
+      MESA_FORMAT_XRGB8888,
+      fetch_texel_1d_f_xrgb8888,
+      fetch_texel_2d_f_xrgb8888,
+      fetch_texel_3d_f_xrgb8888
+   },
+   {
+      MESA_FORMAT_XRGB8888_REV,
+      fetch_texel_1d_f_xrgb8888_rev,
+      fetch_texel_2d_f_xrgb8888_rev,
+      fetch_texel_3d_f_xrgb8888_rev
+   },
+   {
+      MESA_FORMAT_RGB888,
+      fetch_texel_1d_f_rgb888,
+      fetch_texel_2d_f_rgb888,
+      fetch_texel_3d_f_rgb888
+   },
+   {
+      MESA_FORMAT_BGR888,
+      fetch_texel_1d_f_bgr888,
+      fetch_texel_2d_f_bgr888,
+      fetch_texel_3d_f_bgr888
+   },
+   {
+      MESA_FORMAT_RGB565,
+      fetch_texel_1d_f_rgb565,
+      fetch_texel_2d_f_rgb565,
+      fetch_texel_3d_f_rgb565
+   },
+   {
+      MESA_FORMAT_RGB565_REV,
+      fetch_texel_1d_f_rgb565_rev,
+      fetch_texel_2d_f_rgb565_rev,
+      fetch_texel_3d_f_rgb565_rev
+   },
+   {
+      MESA_FORMAT_ARGB4444,
+      fetch_texel_1d_f_argb4444,
+      fetch_texel_2d_f_argb4444,
+      fetch_texel_3d_f_argb4444
+   },
+   {
+      MESA_FORMAT_ARGB4444_REV,
+      fetch_texel_1d_f_argb4444_rev,
+      fetch_texel_2d_f_argb4444_rev,
+      fetch_texel_3d_f_argb4444_rev
+   },
+   {
+      MESA_FORMAT_RGBA5551,
+      fetch_texel_1d_f_rgba5551,
+      fetch_texel_2d_f_rgba5551,
+      fetch_texel_3d_f_rgba5551
+   },
+   {
+      MESA_FORMAT_ARGB1555,
+      fetch_texel_1d_f_argb1555,
+      fetch_texel_2d_f_argb1555,
+      fetch_texel_3d_f_argb1555
+   },
+   {
+      MESA_FORMAT_ARGB1555_REV,
+      fetch_texel_1d_f_argb1555_rev,
+      fetch_texel_2d_f_argb1555_rev,
+      fetch_texel_3d_f_argb1555_rev
+   },
+   {
+      MESA_FORMAT_AL44,
+      fetch_texel_1d_f_al44,
+      fetch_texel_2d_f_al44,
+      fetch_texel_3d_f_al44
+   },
+   {
+      MESA_FORMAT_AL88,
+      fetch_texel_1d_f_al88,
+      fetch_texel_2d_f_al88,
+      fetch_texel_3d_f_al88
+   },
+   {
+      MESA_FORMAT_AL88_REV,
+      fetch_texel_1d_f_al88_rev,
+      fetch_texel_2d_f_al88_rev,
+      fetch_texel_3d_f_al88_rev
+   },
+   {
+      MESA_FORMAT_AL1616,
+      fetch_texel_1d_f_al1616,
+      fetch_texel_2d_f_al1616,
+      fetch_texel_3d_f_al1616
+   },
+   {
+      MESA_FORMAT_AL1616_REV,
+      fetch_texel_1d_f_al1616_rev,
+      fetch_texel_2d_f_al1616_rev,
+      fetch_texel_3d_f_al1616_rev
+   },
+   {
+      MESA_FORMAT_RGB332,
+      fetch_texel_1d_f_rgb332,
+      fetch_texel_2d_f_rgb332,
+      fetch_texel_3d_f_rgb332
+   },
+   {
+      MESA_FORMAT_A8,
+      fetch_texel_1d_f_a8,
+      fetch_texel_2d_f_a8,
+      fetch_texel_3d_f_a8
+   },
+   {
+      MESA_FORMAT_A16,
+      fetch_texel_1d_f_a16,
+      fetch_texel_2d_f_a16,
+      fetch_texel_3d_f_a16
+   },
+   {
+      MESA_FORMAT_L8,
+      fetch_texel_1d_f_l8,
+      fetch_texel_2d_f_l8,
+      fetch_texel_3d_f_l8
+   },
+   {
+      MESA_FORMAT_L16,
+      fetch_texel_1d_f_l16,
+      fetch_texel_2d_f_l16,
+      fetch_texel_3d_f_l16
+   },
+   {
+      MESA_FORMAT_I8,
+      fetch_texel_1d_f_i8,
+      fetch_texel_2d_f_i8,
+      fetch_texel_3d_f_i8
+   },
+   {
+      MESA_FORMAT_I16,
+      fetch_texel_1d_f_i16,
+      fetch_texel_2d_f_i16,
+      fetch_texel_3d_f_i16
+   },
+   {
+      MESA_FORMAT_YCBCR,
+      fetch_texel_1d_f_ycbcr,
+      fetch_texel_2d_f_ycbcr,
+      fetch_texel_3d_f_ycbcr
+   },
+   {
+      MESA_FORMAT_YCBCR_REV,
+      fetch_texel_1d_f_ycbcr_rev,
+      fetch_texel_2d_f_ycbcr_rev,
+      fetch_texel_3d_f_ycbcr_rev
+   },
+   {
+      MESA_FORMAT_R8,
+      fetch_texel_1d_f_r8,
+      fetch_texel_2d_f_r8,
+      fetch_texel_3d_f_r8
+   },
+   {
+      MESA_FORMAT_GR88,
+      fetch_texel_1d_f_gr88,
+      fetch_texel_2d_f_gr88,
+      fetch_texel_3d_f_gr88
+   },
+   {
+      MESA_FORMAT_RG88,
+      fetch_texel_1d_f_rg88,
+      fetch_texel_2d_f_rg88,
+      fetch_texel_3d_f_rg88
+   },
+   {
+      MESA_FORMAT_R16,
+      fetch_texel_1d_f_r16,
+      fetch_texel_2d_f_r16,
+      fetch_texel_3d_f_r16
+   },
+   {
+      MESA_FORMAT_GR1616,
+      fetch_texel_1d_f_rg1616,
+      fetch_texel_2d_f_rg1616,
+      fetch_texel_3d_f_rg1616
+   },
+   {
+      MESA_FORMAT_RG1616,
+      fetch_texel_1d_f_rg1616_rev,
+      fetch_texel_2d_f_rg1616_rev,
+      fetch_texel_3d_f_rg1616_rev
+   },
+   {
+      MESA_FORMAT_ARGB2101010,
+      fetch_texel_1d_f_argb2101010,
+      fetch_texel_2d_f_argb2101010,
+      fetch_texel_3d_f_argb2101010
+   },
+   {
+      MESA_FORMAT_Z24_S8,
+      fetch_texel_1d_f_z24_s8,
+      fetch_texel_2d_f_z24_s8,
+      fetch_texel_3d_f_z24_s8
+   },
+   {
+      MESA_FORMAT_S8_Z24,
+      fetch_texel_1d_f_s8_z24,
+      fetch_texel_2d_f_s8_z24,
+      fetch_texel_3d_f_s8_z24
+   },
+   {
+      MESA_FORMAT_Z16,
+      fetch_texel_1d_f_z16,
+      fetch_texel_2d_f_z16,
+      fetch_texel_3d_f_z16
+   },
+   {
+      MESA_FORMAT_X8_Z24,
+      fetch_texel_1d_f_s8_z24,
+      fetch_texel_2d_f_s8_z24,
+      fetch_texel_3d_f_s8_z24
+   },
+   {
+      MESA_FORMAT_Z24_X8,
+      fetch_texel_1d_f_z24_s8,
+      fetch_texel_2d_f_z24_s8,
+      fetch_texel_3d_f_z24_s8
+   },
+   {
+      MESA_FORMAT_Z32,
+      fetch_texel_1d_f_z32,
+      fetch_texel_2d_f_z32,
+      fetch_texel_3d_f_z32
+   },
+   {
+      MESA_FORMAT_S8,
+      NULL,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_SRGB8,
+      fetch_texel_1d_srgb8,
+      fetch_texel_2d_srgb8,
+      fetch_texel_3d_srgb8
+   },
+   {
+      MESA_FORMAT_SRGBA8,
+      fetch_texel_1d_srgba8,
+      fetch_texel_2d_srgba8,
+      fetch_texel_3d_srgba8
+   },
+   {
+      MESA_FORMAT_SARGB8,
+      fetch_texel_1d_sargb8,
+      fetch_texel_2d_sargb8,
+      fetch_texel_3d_sargb8
+   },
+   {
+      MESA_FORMAT_SL8,
+      fetch_texel_1d_sl8,
+      fetch_texel_2d_sl8,
+      fetch_texel_3d_sl8
+   },
+   {
+      MESA_FORMAT_SLA8,
+      fetch_texel_1d_sla8,
+      fetch_texel_2d_sla8,
+      fetch_texel_3d_sla8
+   },
+   {
+      MESA_FORMAT_SRGB_DXT1,
+      fetch_compressed,
+      fetch_compressed,
+      fetch_compressed
+   },
+   {
+      MESA_FORMAT_SRGBA_DXT1,
+      fetch_compressed,
+      fetch_compressed,
+      fetch_compressed
+   },
+   {
+      MESA_FORMAT_SRGBA_DXT3,
+      fetch_compressed,
+      fetch_compressed,
+      fetch_compressed
+   },
+   {
+      MESA_FORMAT_SRGBA_DXT5,
+      fetch_compressed,
+      fetch_compressed,
+      fetch_compressed
+   },
+
+   {
+      MESA_FORMAT_RGB_FXT1,
+      fetch_compressed,
+      fetch_compressed,
+      fetch_compressed
+   },
+   {
+      MESA_FORMAT_RGBA_FXT1,
+      fetch_compressed,
+      fetch_compressed,
+      fetch_compressed
+   },
+   {
+      MESA_FORMAT_RGB_DXT1,
+      fetch_compressed,
+      fetch_compressed,
+      fetch_compressed
+   },
+   {
+      MESA_FORMAT_RGBA_DXT1,
+      fetch_compressed,
+      fetch_compressed,
+      fetch_compressed
+   },
+   {
+      MESA_FORMAT_RGBA_DXT3,
+      fetch_compressed,
+      fetch_compressed,
+      fetch_compressed
+   },
+   {
+      MESA_FORMAT_RGBA_DXT5,
+      fetch_compressed,
+      fetch_compressed,
+      fetch_compressed
+   },
+   {
+      MESA_FORMAT_RGBA_FLOAT32,
+      fetch_texel_1d_f_rgba_f32,
+      fetch_texel_2d_f_rgba_f32,
+      fetch_texel_3d_f_rgba_f32
+   },
+   {
+      MESA_FORMAT_RGBA_FLOAT16,
+      fetch_texel_1d_f_rgba_f16,
+      fetch_texel_2d_f_rgba_f16,
+      fetch_texel_3d_f_rgba_f16
+   },
+   {
+      MESA_FORMAT_RGB_FLOAT32,
+      fetch_texel_1d_f_rgb_f32,
+      fetch_texel_2d_f_rgb_f32,
+      fetch_texel_3d_f_rgb_f32
+   },
+   {
+      MESA_FORMAT_RGB_FLOAT16,
+      fetch_texel_1d_f_rgb_f16,
+      fetch_texel_2d_f_rgb_f16,
+      fetch_texel_3d_f_rgb_f16
+   },
+   {
+      MESA_FORMAT_ALPHA_FLOAT32,
+      fetch_texel_1d_f_alpha_f32,
+      fetch_texel_2d_f_alpha_f32,
+      fetch_texel_3d_f_alpha_f32
+   },
+   {
+      MESA_FORMAT_ALPHA_FLOAT16,
+      fetch_texel_1d_f_alpha_f16,
+      fetch_texel_2d_f_alpha_f16,
+      fetch_texel_3d_f_alpha_f16
+   },
+   {
+      MESA_FORMAT_LUMINANCE_FLOAT32,
+      fetch_texel_1d_f_luminance_f32,
+      fetch_texel_2d_f_luminance_f32,
+      fetch_texel_3d_f_luminance_f32
+   },
+   {
+      MESA_FORMAT_LUMINANCE_FLOAT16,
+      fetch_texel_1d_f_luminance_f16,
+      fetch_texel_2d_f_luminance_f16,
+      fetch_texel_3d_f_luminance_f16
+   },
+   {
+      MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32,
+      fetch_texel_1d_f_luminance_alpha_f32,
+      fetch_texel_2d_f_luminance_alpha_f32,
+      fetch_texel_3d_f_luminance_alpha_f32
+   },
+   {
+      MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16,
+      fetch_texel_1d_f_luminance_alpha_f16,
+      fetch_texel_2d_f_luminance_alpha_f16,
+      fetch_texel_3d_f_luminance_alpha_f16
+   },
+   {
+      MESA_FORMAT_INTENSITY_FLOAT32,
+      fetch_texel_1d_f_intensity_f32,
+      fetch_texel_2d_f_intensity_f32,
+      fetch_texel_3d_f_intensity_f32
+   },
+   {
+      MESA_FORMAT_INTENSITY_FLOAT16,
+      fetch_texel_1d_f_intensity_f16,
+      fetch_texel_2d_f_intensity_f16,
+      fetch_texel_3d_f_intensity_f16
+   },
+   {
+      MESA_FORMAT_R_FLOAT32,
+      fetch_texel_1d_f_r_f32,
+      fetch_texel_2d_f_r_f32,
+      fetch_texel_3d_f_r_f32
+   },
+   {
+      MESA_FORMAT_R_FLOAT16,
+      fetch_texel_1d_f_r_f16,
+      fetch_texel_2d_f_r_f16,
+      fetch_texel_3d_f_r_f16
+   },
+   {
+      MESA_FORMAT_RG_FLOAT32,
+      fetch_texel_1d_f_rg_f32,
+      fetch_texel_2d_f_rg_f32,
+      fetch_texel_3d_f_rg_f32
+   },
+   {
+      MESA_FORMAT_RG_FLOAT16,
+      fetch_texel_1d_f_rg_f16,
+      fetch_texel_2d_f_rg_f16,
+      fetch_texel_3d_f_rg_f16
+   },
+
+   {
+      MESA_FORMAT_ALPHA_UINT8,
+      NULL,
+      NULL,
+      NULL
+   },
+
+   {
+      MESA_FORMAT_ALPHA_UINT16,
+      NULL,
+      NULL,
+      NULL
+   },
+
+   {
+      MESA_FORMAT_ALPHA_UINT32,
+      NULL,
+      NULL,
+      NULL
+   },
+
+   {
+      MESA_FORMAT_ALPHA_INT8,
+      NULL,
+      NULL,
+      NULL
+   },
+
+   {
+      MESA_FORMAT_ALPHA_INT16,
+      NULL,
+      NULL,
+      NULL
+   },
+
+   {
+      MESA_FORMAT_ALPHA_INT32,
+      NULL,
+      NULL,
+      NULL
+   },
+
+
+   {
+      MESA_FORMAT_INTENSITY_UINT8,
+      NULL,
+      NULL,
+      NULL
+   },
+
+   {
+      MESA_FORMAT_INTENSITY_UINT16,
+      NULL,
+      NULL,
+      NULL
+   },
+
+   {
+      MESA_FORMAT_INTENSITY_UINT32,
+      NULL,
+      NULL,
+      NULL
+   },
+
+   {
+      MESA_FORMAT_INTENSITY_INT8,
+      NULL,
+      NULL,
+      NULL
+   },
+
+   {
+      MESA_FORMAT_INTENSITY_INT16,
+      NULL,
+      NULL,
+      NULL
+   },
+
+   {
+      MESA_FORMAT_INTENSITY_INT32,
+      NULL,
+      NULL,
+      NULL
+   },
+
+
+   {
+      MESA_FORMAT_LUMINANCE_UINT8,
+      NULL,
+      NULL,
+      NULL
+   },
+
+   {
+      MESA_FORMAT_LUMINANCE_UINT16,
+      NULL,
+      NULL,
+      NULL
+   },
+
+   {
+      MESA_FORMAT_LUMINANCE_UINT32,
+      NULL,
+      NULL,
+      NULL
+   },
+
+   {
+      MESA_FORMAT_LUMINANCE_INT8,
+      NULL,
+      NULL,
+      NULL
+   },
+
+   {
+      MESA_FORMAT_LUMINANCE_INT16,
+      NULL,
+      NULL,
+      NULL
+   },
+
+   {
+      MESA_FORMAT_LUMINANCE_INT32,
+      NULL,
+      NULL,
+      NULL
+   },
+
+
+   {
+      MESA_FORMAT_LUMINANCE_ALPHA_UINT8,
+      NULL,
+      NULL,
+      NULL
+   },
+
+   {
+      MESA_FORMAT_LUMINANCE_ALPHA_UINT16,
+      NULL,
+      NULL,
+      NULL
+   },
+
+   {
+      MESA_FORMAT_LUMINANCE_ALPHA_UINT32,
+      NULL,
+      NULL,
+      NULL
+   },
+
+   {
+      MESA_FORMAT_LUMINANCE_ALPHA_INT8,
+      NULL,
+      NULL,
+      NULL
+   },
+
+   {
+      MESA_FORMAT_LUMINANCE_ALPHA_INT16,
+      NULL,
+      NULL,
+      NULL
+   },
+
+   {
+      MESA_FORMAT_LUMINANCE_ALPHA_INT32,
+      NULL,
+      NULL,
+      NULL
+   },
+
+
+   {
+      MESA_FORMAT_R_INT8,
+      NULL,
+      NULL,
+      NULL
+   },
+
+   {
+      MESA_FORMAT_RG_INT8,
+      NULL,
+      NULL,
+      NULL
+   },
+
+   {
+      MESA_FORMAT_RGB_INT8,
+      NULL,
+      NULL,
+      NULL
+   },
+
+   /* non-normalized, signed int */
+   {
+      MESA_FORMAT_RGBA_INT8,
+      fetch_texel_1d_rgba_int8,
+      fetch_texel_2d_rgba_int8,
+      fetch_texel_3d_rgba_int8
+   },
+   {
+      MESA_FORMAT_R_INT16,
+      NULL,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_RG_INT16,
+      NULL,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_RGB_INT16,
+      NULL,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_RGBA_INT16,
+      fetch_texel_1d_rgba_int16,
+      fetch_texel_2d_rgba_int16,
+      fetch_texel_3d_rgba_int16
+   },
+   {
+      MESA_FORMAT_R_INT32,
+      NULL,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_RG_INT32,
+      NULL,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_RGB_INT32,
+      NULL,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_RGBA_INT32,
+      fetch_texel_1d_rgba_int32,
+      fetch_texel_2d_rgba_int32,
+      fetch_texel_3d_rgba_int32
+   },
+
+   /* non-normalized, unsigned int */
+   {
+      MESA_FORMAT_R_UINT8,
+      NULL,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_RG_UINT8,
+      NULL,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_RGB_UINT8,
+      NULL,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_RGBA_UINT8,
+      fetch_texel_1d_rgba_uint8,
+      fetch_texel_2d_rgba_uint8,
+      fetch_texel_3d_rgba_uint8
+   },
+   {
+      MESA_FORMAT_R_UINT16,
+      NULL,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_RG_UINT16,
+      NULL,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_RGB_UINT16,
+      NULL,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_RGBA_UINT16,
+      fetch_texel_1d_rgba_uint16,
+      fetch_texel_2d_rgba_uint16,
+      fetch_texel_3d_rgba_uint16
+   },
+   {
+      MESA_FORMAT_R_UINT32,
+      NULL,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_RG_UINT32,
+      NULL,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_RGB_UINT32,
+      NULL,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_RGBA_UINT32,
+      fetch_texel_1d_rgba_uint32,
+      fetch_texel_2d_rgba_uint32,
+      fetch_texel_3d_rgba_uint32
+   },
+
+   /* dudv */
+   {
+      MESA_FORMAT_DUDV8,
+      fetch_texel_1d_dudv8,
+      fetch_texel_2d_dudv8,
+      fetch_texel_3d_dudv8
+   },
+
+   /* signed, normalized */
+   {
+      MESA_FORMAT_SIGNED_R8,
+      fetch_texel_1d_signed_r8,
+      fetch_texel_2d_signed_r8,
+      fetch_texel_3d_signed_r8
+   },
+   {
+      MESA_FORMAT_SIGNED_RG88_REV,
+      fetch_texel_1d_signed_rg88_rev,
+      fetch_texel_2d_signed_rg88_rev,
+      fetch_texel_3d_signed_rg88_rev
+   },
+   {
+      MESA_FORMAT_SIGNED_RGBX8888,
+      fetch_texel_1d_signed_rgbx8888,
+      fetch_texel_2d_signed_rgbx8888,
+      fetch_texel_3d_signed_rgbx8888
+   },
+   {
+      MESA_FORMAT_SIGNED_RGBA8888,
+      fetch_texel_1d_signed_rgba8888,
+      fetch_texel_2d_signed_rgba8888,
+      fetch_texel_3d_signed_rgba8888
+   },
+   {
+      MESA_FORMAT_SIGNED_RGBA8888_REV,
+      fetch_texel_1d_signed_rgba8888_rev,
+      fetch_texel_2d_signed_rgba8888_rev,
+      fetch_texel_3d_signed_rgba8888_rev
+   },
+   {
+      MESA_FORMAT_SIGNED_R16,
+      fetch_texel_1d_signed_r16,
+      fetch_texel_2d_signed_r16,
+      fetch_texel_3d_signed_r16
+   },
+   {
+      MESA_FORMAT_SIGNED_GR1616,
+      fetch_texel_1d_signed_rg1616,
+      fetch_texel_2d_signed_rg1616,
+      fetch_texel_3d_signed_rg1616
+   },
+   {
+      MESA_FORMAT_SIGNED_RGB_16,
+      fetch_texel_1d_signed_rgb_16,
+      fetch_texel_2d_signed_rgb_16,
+      fetch_texel_3d_signed_rgb_16
+   },
+   {
+      MESA_FORMAT_SIGNED_RGBA_16,
+      fetch_texel_1d_signed_rgba_16,
+      fetch_texel_2d_signed_rgba_16,
+      fetch_texel_3d_signed_rgba_16
+   },
+   {
+      MESA_FORMAT_RGBA_16,
+      fetch_texel_1d_rgba_16,
+      fetch_texel_2d_rgba_16,
+      fetch_texel_3d_rgba_16
+   },
+   {
+      MESA_FORMAT_RED_RGTC1,
+      fetch_compressed,
+      fetch_compressed,
+      fetch_compressed
+   },
+   {
+      MESA_FORMAT_SIGNED_RED_RGTC1,
+      fetch_compressed,
+      fetch_compressed,
+      fetch_compressed
+   },
+   {
+      MESA_FORMAT_RG_RGTC2,
+      fetch_compressed,
+      fetch_compressed,
+      fetch_compressed
+   },
+   {
+      MESA_FORMAT_SIGNED_RG_RGTC2,
+      fetch_compressed,
+      fetch_compressed,
+      fetch_compressed
+   },
+   {
+      MESA_FORMAT_L_LATC1,
+      fetch_compressed,
+      fetch_compressed,
+      fetch_compressed
+   },
+   {
+      MESA_FORMAT_SIGNED_L_LATC1,
+      fetch_compressed,
+      fetch_compressed,
+      fetch_compressed
+   },
+   {
+      MESA_FORMAT_LA_LATC2,
+      fetch_compressed,
+      fetch_compressed,
+      fetch_compressed
+   },
+   {
+      MESA_FORMAT_SIGNED_LA_LATC2,
+      fetch_compressed,
+      fetch_compressed,
+      fetch_compressed
+   },
+   {
+      MESA_FORMAT_ETC1_RGB8,
+      fetch_compressed,
+      fetch_compressed,
+      fetch_compressed
+   },
+   {
+      MESA_FORMAT_ETC2_RGB8,
+      fetch_compressed,
+      fetch_compressed,
+      fetch_compressed
+   },
+   {
+      MESA_FORMAT_ETC2_SRGB8,
+      fetch_compressed,
+      fetch_compressed,
+      fetch_compressed
+   },
+   {
+      MESA_FORMAT_ETC2_RGBA8_EAC,
+      fetch_compressed,
+      fetch_compressed,
+      fetch_compressed
+   },
+   {
+      MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC,
+      fetch_compressed,
+      fetch_compressed,
+      fetch_compressed
+   },
+   {
+      MESA_FORMAT_ETC2_R11_EAC,
+      fetch_compressed,
+      fetch_compressed,
+      fetch_compressed
+   },
+   {
+      MESA_FORMAT_ETC2_RG11_EAC,
+      fetch_compressed,
+      fetch_compressed,
+      fetch_compressed
+   },
+   {
+      MESA_FORMAT_ETC2_SIGNED_R11_EAC,
+      fetch_compressed,
+      fetch_compressed,
+      fetch_compressed
+   },
+   {
+      MESA_FORMAT_ETC2_SIGNED_RG11_EAC,
+      fetch_compressed,
+      fetch_compressed,
+      fetch_compressed
+   },
+   {
+      MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1,
+      fetch_compressed,
+      fetch_compressed,
+      fetch_compressed
+   },
+   {
+      MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1,
+      fetch_compressed,
+      fetch_compressed,
+      fetch_compressed
+   },
+   {
+      MESA_FORMAT_SIGNED_A8,
+      fetch_texel_1d_signed_a8,
+      fetch_texel_2d_signed_a8,
+      fetch_texel_3d_signed_a8
+   },
+   {
+      MESA_FORMAT_SIGNED_L8,
+      fetch_texel_1d_signed_l8,
+      fetch_texel_2d_signed_l8,
+      fetch_texel_3d_signed_l8
+   },
+   {
+      MESA_FORMAT_SIGNED_AL88,
+      fetch_texel_1d_signed_al88,
+      fetch_texel_2d_signed_al88,
+      fetch_texel_3d_signed_al88
+   },
+   {
+      MESA_FORMAT_SIGNED_I8,
+      fetch_texel_1d_signed_i8,
+      fetch_texel_2d_signed_i8,
+      fetch_texel_3d_signed_i8
+   },
+   {
+      MESA_FORMAT_SIGNED_A16,
+      fetch_texel_1d_signed_a16,
+      fetch_texel_2d_signed_a16,
+      fetch_texel_3d_signed_a16
+   },
+   {
+      MESA_FORMAT_SIGNED_L16,
+      fetch_texel_1d_signed_l16,
+      fetch_texel_2d_signed_l16,
+      fetch_texel_3d_signed_l16
+   },
+   {
+      MESA_FORMAT_SIGNED_AL1616,
+      fetch_texel_1d_signed_al1616,
+      fetch_texel_2d_signed_al1616,
+      fetch_texel_3d_signed_al1616
+   },
+   {
+      MESA_FORMAT_SIGNED_I16,
+      fetch_texel_1d_signed_i16,
+      fetch_texel_2d_signed_i16,
+      fetch_texel_3d_signed_i16
+   },
+   {
+      MESA_FORMAT_RGB9_E5_FLOAT,
+      fetch_texel_1d_rgb9_e5,
+      fetch_texel_2d_rgb9_e5,
+      fetch_texel_3d_rgb9_e5
+   },
+   {
+      MESA_FORMAT_R11_G11_B10_FLOAT,
+      fetch_texel_1d_r11_g11_b10f,
+      fetch_texel_2d_r11_g11_b10f,
+      fetch_texel_3d_r11_g11_b10f
+   },
+   {
+      MESA_FORMAT_Z32_FLOAT,
+      fetch_texel_1d_f_r_f32, /* Reuse the R32F functions. */
+      fetch_texel_2d_f_r_f32,
+      fetch_texel_3d_f_r_f32
+   },
+   {
+      MESA_FORMAT_Z32_FLOAT_X24S8,
+      fetch_texel_1d_z32f_x24s8,
+      fetch_texel_2d_z32f_x24s8,
+      fetch_texel_3d_z32f_x24s8
+   },
+   {
+      MESA_FORMAT_ARGB2101010_UINT,
+      NULL,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_ABGR2101010_UINT,
+      NULL,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_XRGB4444_UNORM,
+      NULL,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_XRGB1555_UNORM,
+      NULL,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_XBGR8888_SNORM,
+      NULL,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_XBGR8888_SRGB,
+      NULL,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_XBGR8888_UINT,
+      NULL,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_XBGR8888_SINT,
+      NULL,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_XRGB2101010_UNORM,
+      NULL,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_XBGR16161616_UNORM,
+      fetch_texel_1d_xbgr16161616_unorm,
+      fetch_texel_2d_xbgr16161616_unorm,
+      fetch_texel_3d_xbgr16161616_unorm
+   },
+   {
+      MESA_FORMAT_XBGR16161616_SNORM,
+      NULL,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_XBGR16161616_FLOAT,
+      fetch_texel_1d_xbgr16161616_float,
+      fetch_texel_2d_xbgr16161616_float,
+      fetch_texel_3d_xbgr16161616_float
+   },
+   {
+      MESA_FORMAT_XBGR16161616_UINT,
+      NULL,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_XBGR16161616_SINT,
+      NULL,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_XBGR32323232_FLOAT,
+      fetch_texel_1d_xbgr32323232_float,
+      fetch_texel_2d_xbgr32323232_float,
+      fetch_texel_3d_xbgr32323232_float
+   },
+   {
+      MESA_FORMAT_XBGR32323232_UINT,
+      NULL,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_XBGR32323232_SINT,
+      NULL,
+      NULL,
+      NULL
+   },
+};
+
+
+/**
+ * Initialize the texture image's FetchTexel methods.
+ */
+static void
+set_fetch_functions(const struct gl_sampler_object *samp,
+                    struct swrast_texture_image *texImage, GLuint dims)
+{
+   gl_format format = texImage->Base.TexFormat;
+
+#ifdef DEBUG
+   /* check that the table entries are sorted by format name */
+   gl_format fmt;
+   for (fmt = 0; fmt < MESA_FORMAT_COUNT; fmt++) {
+      assert(texfetch_funcs[fmt].Name == fmt);
+   }
+#endif
+
+   STATIC_ASSERT(Elements(texfetch_funcs) == MESA_FORMAT_COUNT);
+
+   if (samp->sRGBDecode == GL_SKIP_DECODE_EXT &&
+       _mesa_get_format_color_encoding(format) == GL_SRGB) {
+      format = _mesa_get_srgb_format_linear(format);
+   }
+
+   assert(format < MESA_FORMAT_COUNT);
+
+   switch (dims) {
+   case 1:
+      texImage->FetchTexel = texfetch_funcs[format].Fetch1D;
+      break;
+   case 2:
+      texImage->FetchTexel = texfetch_funcs[format].Fetch2D;
+      break;
+   case 3:
+      texImage->FetchTexel = texfetch_funcs[format].Fetch3D;
+      break;
+   default:
+      assert(!"Bad dims in set_fetch_functions()");
+   }
+
+   texImage->FetchCompressedTexel = _mesa_get_compressed_fetch_func(format);
+
+   ASSERT(texImage->FetchTexel);
+}
+
+void
+_mesa_update_fetch_functions(struct gl_context *ctx, GLuint unit)
+{
+   struct gl_texture_object *texObj = ctx->Texture.Unit[unit]._Current;
+   struct gl_sampler_object *samp;
+   GLuint face, i;
+   GLuint dims;
+
+   if (!texObj)
+      return;
+
+   samp = _mesa_get_samplerobj(ctx, unit);
+
+   dims = _mesa_get_texture_dimensions(texObj->Target);
+
+   for (face = 0; face < 6; face++) {
+      for (i = 0; i < MAX_TEXTURE_LEVELS; i++) {
+         if (texObj->Image[face][i]) {
+	    set_fetch_functions(samp,
+                                swrast_texture_image(texObj->Image[face][i]),
+                                dims);
+         }
+      }
+   }
+}
diff --git a/dist/Mesa/src/mesa/swrast/s_texfetch.h b/dist/Mesa/src/mesa/swrast/s_texfetch.h
new file mode 100644
index 000000000..2a9fbb7ac
--- /dev/null
+++ b/dist/Mesa/src/mesa/swrast/s_texfetch.h
@@ -0,0 +1,35 @@
+/*
+ * Mesa 3-D graphics library
+ *
+ * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
+ * Copyright (c) 2009 VMware, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+#ifndef S_TEXFETCH_H
+#define S_TEXFETCH_H
+
+#include "swrast/s_context.h"
+
+void
+_mesa_update_fetch_functions(struct gl_context *ctx, GLuint unit);
+
+#endif /* S_TEXFETCH_H */
diff --git a/dist/Mesa/src/mesa/swrast/s_texfetch_tmp.h b/dist/Mesa/src/mesa/swrast/s_texfetch_tmp.h
new file mode 100644
index 000000000..7a687532d
--- /dev/null
+++ b/dist/Mesa/src/mesa/swrast/s_texfetch_tmp.h
@@ -0,0 +1,1610 @@
+/*
+ * Mesa 3-D graphics library
+ *
+ * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
+ * Copyright (c) 2008-2009  VMware, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/**
+ * \file texfetch_tmp.h
+ * Texel fetch functions template.
+ * 
+ * This template file is used by texfetch.c to generate texel fetch functions
+ * for 1-D, 2-D and 3-D texture images. 
+ *
+ * It should be expanded by defining \p DIM as the number texture dimensions
+ * (1, 2 or 3).  According to the value of \p DIM a series of macros is defined
+ * for the texel lookup in the gl_texture_image::Data.
+ * 
+ * \author Gareth Hughes
+ * \author Brian Paul
+ */
+
+
+#if DIM == 1
+
+#define TEXEL_ADDR( type, image, i, j, k, size ) \
+	((void) (j), (void) (k), ((type *)(image)->ImageSlices[0] + (i) * (size)))
+
+#define FETCH(x) fetch_texel_1d_##x
+
+#elif DIM == 2
+
+#define TEXEL_ADDR( type, image, i, j, k, size )			\
+       ((void) (k),							\
+        ((type *)((GLubyte *) (image)->ImageSlices[0] + (image)->RowStride * (j)) + \
+          (i) * (size)))
+
+#define FETCH(x) fetch_texel_2d_##x
+
+#elif DIM == 3
+
+#define TEXEL_ADDR( type, image, i, j, k, size )			\
+        ((type *)((GLubyte *) (image)->ImageSlices[k] +                      \
+                  (image)->RowStride * (j)) + (i) * (size))
+
+#define FETCH(x) fetch_texel_3d_##x
+
+#else
+#error	illegal number of texture dimensions
+#endif
+
+
+/* MESA_FORMAT_Z32 ***********************************************************/
+
+/* Fetch depth texel from 1D, 2D or 3D 32-bit depth texture,
+ * returning 1 GLfloat.
+ * Note: no GLchan version of this function.
+ */
+static void FETCH(f_z32)( const struct swrast_texture_image *texImage,
+                          GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLuint *src = TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
+   texel[0] = src[0] * (1.0F / 0xffffffff);
+}
+
+
+/* MESA_FORMAT_Z16 ***********************************************************/
+
+/* Fetch depth texel from 1D, 2D or 3D 16-bit depth texture,
+ * returning 1 GLfloat.
+ * Note: no GLchan version of this function.
+ */
+static void FETCH(f_z16)(const struct swrast_texture_image *texImage,
+                         GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLushort *src = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
+   texel[0] = src[0] * (1.0F / 65535.0F);
+}
+
+
+
+/* MESA_FORMAT_RGBA_F32 ******************************************************/
+
+/* Fetch texel from 1D, 2D or 3D RGBA_FLOAT32 texture, returning 4 GLfloats.
+ */
+static void FETCH(f_rgba_f32)( const struct swrast_texture_image *texImage,
+                               GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLfloat *src = TEXEL_ADDR(GLfloat, texImage, i, j, k, 4);
+   texel[RCOMP] = src[0];
+   texel[GCOMP] = src[1];
+   texel[BCOMP] = src[2];
+   texel[ACOMP] = src[3];
+}
+
+
+
+
+/* MESA_FORMAT_RGBA_F16 ******************************************************/
+
+/* Fetch texel from 1D, 2D or 3D RGBA_FLOAT16 texture,
+ * returning 4 GLfloats.
+ */
+static void FETCH(f_rgba_f16)( const struct swrast_texture_image *texImage,
+                               GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLhalfARB *src = TEXEL_ADDR(GLhalfARB, texImage, i, j, k, 4);
+   texel[RCOMP] = _mesa_half_to_float(src[0]);
+   texel[GCOMP] = _mesa_half_to_float(src[1]);
+   texel[BCOMP] = _mesa_half_to_float(src[2]);
+   texel[ACOMP] = _mesa_half_to_float(src[3]);
+}
+
+
+
+/* MESA_FORMAT_RGB_F32 *******************************************************/
+
+/* Fetch texel from 1D, 2D or 3D RGB_FLOAT32 texture,
+ * returning 4 GLfloats.
+ */
+static void FETCH(f_rgb_f32)( const struct swrast_texture_image *texImage,
+                              GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLfloat *src = TEXEL_ADDR(GLfloat, texImage, i, j, k, 3);
+   texel[RCOMP] = src[0];
+   texel[GCOMP] = src[1];
+   texel[BCOMP] = src[2];
+   texel[ACOMP] = 1.0F;
+}
+
+
+
+
+/* MESA_FORMAT_RGB_F16 *******************************************************/
+
+/* Fetch texel from 1D, 2D or 3D RGB_FLOAT16 texture,
+ * returning 4 GLfloats.
+ */
+static void FETCH(f_rgb_f16)( const struct swrast_texture_image *texImage,
+                              GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLhalfARB *src = TEXEL_ADDR(GLhalfARB, texImage, i, j, k, 3);
+   texel[RCOMP] = _mesa_half_to_float(src[0]);
+   texel[GCOMP] = _mesa_half_to_float(src[1]);
+   texel[BCOMP] = _mesa_half_to_float(src[2]);
+   texel[ACOMP] = 1.0F;
+}
+
+
+
+
+/* MESA_FORMAT_ALPHA_F32 *****************************************************/
+
+/* Fetch texel from 1D, 2D or 3D ALPHA_FLOAT32 texture,
+ * returning 4 GLfloats.
+ */
+static void FETCH(f_alpha_f32)( const struct swrast_texture_image *texImage,
+                              GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLfloat *src = TEXEL_ADDR(GLfloat, texImage, i, j, k, 1);
+   texel[RCOMP] =
+   texel[GCOMP] =
+   texel[BCOMP] = 0.0F;
+   texel[ACOMP] = src[0];
+}
+
+
+
+
+/* MESA_FORMAT_ALPHA_F32 *****************************************************/
+
+/* Fetch texel from 1D, 2D or 3D ALPHA_FLOAT16 texture,
+ * returning 4 GLfloats.
+ */
+static void FETCH(f_alpha_f16)( const struct swrast_texture_image *texImage,
+                              GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLhalfARB *src = TEXEL_ADDR(GLhalfARB, texImage, i, j, k, 1);
+   texel[RCOMP] =
+   texel[GCOMP] =
+   texel[BCOMP] = 0.0F;
+   texel[ACOMP] = _mesa_half_to_float(src[0]);
+}
+
+
+
+
+/* MESA_FORMAT_LUMINANCE_F32 *************************************************/
+
+/* Fetch texel from 1D, 2D or 3D LUMINANCE_FLOAT32 texture,
+ * returning 4 GLfloats.
+ */
+static void FETCH(f_luminance_f32)( const struct swrast_texture_image *texImage,
+                                    GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLfloat *src = TEXEL_ADDR(GLfloat, texImage, i, j, k, 1);
+   texel[RCOMP] =
+   texel[GCOMP] =
+   texel[BCOMP] = src[0];
+   texel[ACOMP] = 1.0F;
+}
+
+
+
+
+/* MESA_FORMAT_LUMINANCE_F16 *************************************************/
+
+/* Fetch texel from 1D, 2D or 3D LUMINANCE_FLOAT16 texture,
+ * returning 4 GLfloats.
+ */
+static void FETCH(f_luminance_f16)( const struct swrast_texture_image *texImage,
+                                    GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLhalfARB *src = TEXEL_ADDR(GLhalfARB, texImage, i, j, k, 1);
+   texel[RCOMP] =
+   texel[GCOMP] =
+   texel[BCOMP] = _mesa_half_to_float(src[0]);
+   texel[ACOMP] = 1.0F;
+}
+
+
+
+
+/* MESA_FORMAT_LUMINANCE_ALPHA_F32 *******************************************/
+
+/* Fetch texel from 1D, 2D or 3D LUMINANCE_ALPHA_FLOAT32 texture,
+ * returning 4 GLfloats.
+ */
+static void FETCH(f_luminance_alpha_f32)( const struct swrast_texture_image *texImage,
+                                    GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLfloat *src = TEXEL_ADDR(GLfloat, texImage, i, j, k, 2);
+   texel[RCOMP] =
+   texel[GCOMP] =
+   texel[BCOMP] = src[0];
+   texel[ACOMP] = src[1];
+}
+
+
+
+
+/* MESA_FORMAT_LUMINANCE_ALPHA_F16 *******************************************/
+
+/* Fetch texel from 1D, 2D or 3D LUMINANCE_ALPHA_FLOAT16 texture,
+ * returning 4 GLfloats.
+ */
+static void FETCH(f_luminance_alpha_f16)( const struct swrast_texture_image *texImage,
+                                    GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLhalfARB *src = TEXEL_ADDR(GLhalfARB, texImage, i, j, k, 2);
+   texel[RCOMP] =
+   texel[GCOMP] =
+   texel[BCOMP] = _mesa_half_to_float(src[0]);
+   texel[ACOMP] = _mesa_half_to_float(src[1]);
+}
+
+
+
+
+/* MESA_FORMAT_INTENSITY_F32 *************************************************/
+
+/* Fetch texel from 1D, 2D or 3D INTENSITY_FLOAT32 texture,
+ * returning 4 GLfloats.
+ */
+static void FETCH(f_intensity_f32)( const struct swrast_texture_image *texImage,
+                                    GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLfloat *src = TEXEL_ADDR(GLfloat, texImage, i, j, k, 1);
+   texel[RCOMP] =
+   texel[GCOMP] =
+   texel[BCOMP] =
+   texel[ACOMP] = src[0];
+}
+
+
+
+
+/* MESA_FORMAT_INTENSITY_F16 *************************************************/
+
+/* Fetch texel from 1D, 2D or 3D INTENSITY_FLOAT16 texture,
+ * returning 4 GLfloats.
+ */
+static void FETCH(f_intensity_f16)( const struct swrast_texture_image *texImage,
+                                    GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLhalfARB *src = TEXEL_ADDR(GLhalfARB, texImage, i, j, k, 1);
+   texel[RCOMP] =
+   texel[GCOMP] =
+   texel[BCOMP] =
+   texel[ACOMP] = _mesa_half_to_float(src[0]);
+}
+
+
+
+
+/* MESA_FORMAT_R_FLOAT32 *****************************************************/
+
+/* Fetch texel from 1D, 2D or 3D R_FLOAT32 texture,
+ * returning 4 GLfloats.
+ */
+static void FETCH(f_r_f32)( const struct swrast_texture_image *texImage,
+                            GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLfloat *src = TEXEL_ADDR(GLfloat, texImage, i, j, k, 1);
+   texel[RCOMP] = src[0];
+   texel[GCOMP] = 0.0F;
+   texel[BCOMP] = 0.0F;
+   texel[ACOMP] = 1.0F;
+}
+
+
+
+
+/* MESA_FORMAT_R_FLOAT16 *****************************************************/
+
+/* Fetch texel from 1D, 2D or 3D R_FLOAT16 texture,
+ * returning 4 GLfloats.
+ */
+static void FETCH(f_r_f16)( const struct swrast_texture_image *texImage,
+                            GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLhalfARB *src = TEXEL_ADDR(GLhalfARB, texImage, i, j, k, 1);
+   texel[RCOMP] = _mesa_half_to_float(src[0]);
+   texel[GCOMP] = 0.0F;
+   texel[BCOMP] = 0.0F;
+   texel[ACOMP] = 1.0F;
+}
+
+
+
+
+/* MESA_FORMAT_RG_FLOAT32 ****************************************************/
+
+/* Fetch texel from 1D, 2D or 3D RG_FLOAT32 texture,
+ * returning 4 GLfloats.
+ */
+static void FETCH(f_rg_f32)( const struct swrast_texture_image *texImage,
+                             GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLfloat *src = TEXEL_ADDR(GLfloat, texImage, i, j, k, 2);
+   texel[RCOMP] = src[0];
+   texel[GCOMP] = src[1];
+   texel[BCOMP] = 0.0F;
+   texel[ACOMP] = 1.0F;
+}
+
+
+
+
+/* MESA_FORMAT_RG_FLOAT16 ****************************************************/
+
+/* Fetch texel from 1D, 2D or 3D RG_FLOAT16 texture,
+ * returning 4 GLfloats.
+ */
+static void FETCH(f_rg_f16)( const struct swrast_texture_image *texImage,
+                             GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLhalfARB *src = TEXEL_ADDR(GLhalfARB, texImage, i, j, k, 2);
+   texel[RCOMP] = _mesa_half_to_float(src[0]);
+   texel[GCOMP] = _mesa_half_to_float(src[1]);
+   texel[BCOMP] = 0.0F;
+   texel[ACOMP] = 1.0F;
+}
+
+
+
+
+/*
+ * Begin Hardware formats
+ */
+
+/* MESA_FORMAT_RGBA8888 ******************************************************/
+
+/* Fetch texel from 1D, 2D or 3D rgba8888 texture, return 4 GLfloats */
+static void FETCH(f_rgba8888)( const struct swrast_texture_image *texImage,
+                               GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLuint s = *TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
+   texel[RCOMP] = UBYTE_TO_FLOAT( (s >> 24)        );
+   texel[GCOMP] = UBYTE_TO_FLOAT( (s >> 16) & 0xff );
+   texel[BCOMP] = UBYTE_TO_FLOAT( (s >>  8) & 0xff );
+   texel[ACOMP] = UBYTE_TO_FLOAT( (s      ) & 0xff );
+}
+
+
+
+
+
+
+/* MESA_FORMAT_RGBA888_REV ***************************************************/
+
+/* Fetch texel from 1D, 2D or 3D abgr8888 texture, return 4 GLchans */
+static void FETCH(f_rgba8888_rev)( const struct swrast_texture_image *texImage,
+                                   GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLuint s = *TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
+   texel[RCOMP] = UBYTE_TO_FLOAT( (s      ) & 0xff );
+   texel[GCOMP] = UBYTE_TO_FLOAT( (s >>  8) & 0xff );
+   texel[BCOMP] = UBYTE_TO_FLOAT( (s >> 16) & 0xff );
+   texel[ACOMP] = UBYTE_TO_FLOAT( (s >> 24)        );
+}
+
+
+
+
+/* MESA_FORMAT_ARGB8888 ******************************************************/
+
+/* Fetch texel from 1D, 2D or 3D argb8888 texture, return 4 GLchans */
+static void FETCH(f_argb8888)( const struct swrast_texture_image *texImage,
+                               GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLuint s = *TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
+   texel[RCOMP] = UBYTE_TO_FLOAT( (s >> 16) & 0xff );
+   texel[GCOMP] = UBYTE_TO_FLOAT( (s >>  8) & 0xff );
+   texel[BCOMP] = UBYTE_TO_FLOAT( (s      ) & 0xff );
+   texel[ACOMP] = UBYTE_TO_FLOAT( (s >> 24)        );
+}
+
+
+
+
+/* MESA_FORMAT_ARGB8888_REV **************************************************/
+
+/* Fetch texel from 1D, 2D or 3D argb8888_rev texture, return 4 GLfloats */
+static void FETCH(f_argb8888_rev)( const struct swrast_texture_image *texImage,
+                                   GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLuint s = *TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
+   texel[RCOMP] = UBYTE_TO_FLOAT( (s >>  8) & 0xff );
+   texel[GCOMP] = UBYTE_TO_FLOAT( (s >> 16) & 0xff );
+   texel[BCOMP] = UBYTE_TO_FLOAT( (s >> 24)        );
+   texel[ACOMP] = UBYTE_TO_FLOAT( (s      ) & 0xff );
+}
+
+
+
+
+/* MESA_FORMAT_RGBX8888 ******************************************************/
+
+/* Fetch texel from 1D, 2D or 3D rgbx8888 texture, return 4 GLfloats */
+static void FETCH(f_rgbx8888)( const struct swrast_texture_image *texImage,
+                               GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLuint s = *TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
+   texel[RCOMP] = UBYTE_TO_FLOAT( (s >> 24)        );
+   texel[GCOMP] = UBYTE_TO_FLOAT( (s >> 16) & 0xff );
+   texel[BCOMP] = UBYTE_TO_FLOAT( (s >>  8) & 0xff );
+   texel[ACOMP] = 1.0f;
+}
+
+
+
+
+/* MESA_FORMAT_RGBX888_REV ***************************************************/
+
+/* Fetch texel from 1D, 2D or 3D rgbx8888_rev texture, return 4 GLchans */
+static void FETCH(f_rgbx8888_rev)( const struct swrast_texture_image *texImage,
+                                   GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLuint s = *TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
+   texel[RCOMP] = UBYTE_TO_FLOAT( (s      ) & 0xff );
+   texel[GCOMP] = UBYTE_TO_FLOAT( (s >>  8) & 0xff );
+   texel[BCOMP] = UBYTE_TO_FLOAT( (s >> 16) & 0xff );
+   texel[ACOMP] = 1.0f;
+}
+
+
+
+
+/* MESA_FORMAT_XRGB8888 ******************************************************/
+
+/* Fetch texel from 1D, 2D or 3D xrgb8888 texture, return 4 GLchans */
+static void FETCH(f_xrgb8888)( const struct swrast_texture_image *texImage,
+                               GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLuint s = *TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
+   texel[RCOMP] = UBYTE_TO_FLOAT( (s >> 16) & 0xff );
+   texel[GCOMP] = UBYTE_TO_FLOAT( (s >>  8) & 0xff );
+   texel[BCOMP] = UBYTE_TO_FLOAT( (s      ) & 0xff );
+   texel[ACOMP] = 1.0f;
+}
+
+
+
+
+/* MESA_FORMAT_XRGB8888_REV **************************************************/
+
+/* Fetch texel from 1D, 2D or 3D xrgb8888_rev texture, return 4 GLfloats */
+static void FETCH(f_xrgb8888_rev)( const struct swrast_texture_image *texImage,
+                                   GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLuint s = *TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
+   texel[RCOMP] = UBYTE_TO_FLOAT( (s >>  8) & 0xff );
+   texel[GCOMP] = UBYTE_TO_FLOAT( (s >> 16) & 0xff );
+   texel[BCOMP] = UBYTE_TO_FLOAT( (s >> 24)        );
+   texel[ACOMP] = 1.0f;
+}
+
+
+
+
+/* MESA_FORMAT_RGB888 ********************************************************/
+
+/* Fetch texel from 1D, 2D or 3D rgb888 texture, return 4 GLchans */
+static void FETCH(f_rgb888)( const struct swrast_texture_image *texImage,
+                             GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLubyte *src = TEXEL_ADDR(GLubyte, texImage, i, j, k, 3);
+   texel[RCOMP] = UBYTE_TO_FLOAT( src[2] );
+   texel[GCOMP] = UBYTE_TO_FLOAT( src[1] );
+   texel[BCOMP] = UBYTE_TO_FLOAT( src[0] );
+   texel[ACOMP] = 1.0F;
+}
+
+
+
+
+/* MESA_FORMAT_BGR888 ********************************************************/
+
+/* Fetch texel from 1D, 2D or 3D bgr888 texture, return 4 GLchans */
+static void FETCH(f_bgr888)( const struct swrast_texture_image *texImage,
+                             GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLubyte *src = TEXEL_ADDR(GLubyte, texImage, i, j, k, 3);
+   texel[RCOMP] = UBYTE_TO_FLOAT( src[0] );
+   texel[GCOMP] = UBYTE_TO_FLOAT( src[1] );
+   texel[BCOMP] = UBYTE_TO_FLOAT( src[2] );
+   texel[ACOMP] = 1.0F;
+}
+
+
+
+
+/* use color expansion like (g << 2) | (g >> 4) (does somewhat random rounding)
+   instead of slow (g << 2) * 255 / 252 (always rounds down) */
+
+/* MESA_FORMAT_RGB565 ********************************************************/
+
+/* Fetch texel from 1D, 2D or 3D rgb565 texture, return 4 GLchans */
+static void FETCH(f_rgb565)( const struct swrast_texture_image *texImage,
+                             GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLushort *src = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
+   const GLushort s = *src;
+   texel[RCOMP] = ((s >> 11) & 0x1f) * (1.0F / 31.0F);
+   texel[GCOMP] = ((s >> 5 ) & 0x3f) * (1.0F / 63.0F);
+   texel[BCOMP] = ((s      ) & 0x1f) * (1.0F / 31.0F);
+   texel[ACOMP] = 1.0F;
+}
+
+
+
+
+/* MESA_FORMAT_RGB565_REV ****************************************************/
+
+/* Fetch texel from 1D, 2D or 3D rgb565_rev texture, return 4 GLchans */
+static void FETCH(f_rgb565_rev)( const struct swrast_texture_image *texImage,
+                                 GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLushort *src = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
+   const GLushort s = (*src >> 8) | (*src << 8); /* byte swap */
+   texel[RCOMP] = UBYTE_TO_FLOAT( ((s >> 8) & 0xf8) | ((s >> 13) & 0x7) );
+   texel[GCOMP] = UBYTE_TO_FLOAT( ((s >> 3) & 0xfc) | ((s >>  9) & 0x3) );
+   texel[BCOMP] = UBYTE_TO_FLOAT( ((s << 3) & 0xf8) | ((s >>  2) & 0x7) );
+   texel[ACOMP] = 1.0F;
+}
+
+
+
+
+/* MESA_FORMAT_ARGB4444 ******************************************************/
+
+/* Fetch texel from 1D, 2D or 3D argb444 texture, return 4 GLchans */
+static void FETCH(f_argb4444)( const struct swrast_texture_image *texImage,
+                               GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLushort *src = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
+   const GLushort s = *src;
+   texel[RCOMP] = ((s >>  8) & 0xf) * (1.0F / 15.0F);
+   texel[GCOMP] = ((s >>  4) & 0xf) * (1.0F / 15.0F);
+   texel[BCOMP] = ((s      ) & 0xf) * (1.0F / 15.0F);
+   texel[ACOMP] = ((s >> 12) & 0xf) * (1.0F / 15.0F);
+}
+
+
+
+
+/* MESA_FORMAT_ARGB4444_REV **************************************************/
+
+/* Fetch texel from 1D, 2D or 3D argb4444_rev texture, return 4 GLchans */
+static void FETCH(f_argb4444_rev)( const struct swrast_texture_image *texImage,
+                                   GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLushort s = *TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
+   texel[RCOMP] = ((s      ) & 0xf) * (1.0F / 15.0F);
+   texel[GCOMP] = ((s >> 12) & 0xf) * (1.0F / 15.0F);
+   texel[BCOMP] = ((s >>  8) & 0xf) * (1.0F / 15.0F);
+   texel[ACOMP] = ((s >>  4) & 0xf) * (1.0F / 15.0F);
+}
+
+
+
+/* MESA_FORMAT_RGBA5551 ******************************************************/
+
+/* Fetch texel from 1D, 2D or 3D argb1555 texture, return 4 GLchans */
+static void FETCH(f_rgba5551)( const struct swrast_texture_image *texImage,
+                               GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLushort *src = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
+   const GLushort s = *src;
+   texel[RCOMP] = ((s >> 11) & 0x1f) * (1.0F / 31.0F);
+   texel[GCOMP] = ((s >>  6) & 0x1f) * (1.0F / 31.0F);
+   texel[BCOMP] = ((s >>  1) & 0x1f) * (1.0F / 31.0F);
+   texel[ACOMP] = ((s      ) & 0x01) * 1.0F;
+}
+
+
+
+/* MESA_FORMAT_ARGB1555 ******************************************************/
+
+/* Fetch texel from 1D, 2D or 3D argb1555 texture, return 4 GLchans */
+static void FETCH(f_argb1555)( const struct swrast_texture_image *texImage,
+			     GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLushort *src = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
+   const GLushort s = *src;
+   texel[RCOMP] = ((s >> 10) & 0x1f) * (1.0F / 31.0F);
+   texel[GCOMP] = ((s >>  5) & 0x1f) * (1.0F / 31.0F);
+   texel[BCOMP] = ((s >>  0) & 0x1f) * (1.0F / 31.0F);
+   texel[ACOMP] = ((s >> 15) & 0x01) * 1.0F;
+}
+
+
+
+
+/* MESA_FORMAT_ARGB1555_REV **************************************************/
+
+/* Fetch texel from 1D, 2D or 3D argb1555_rev texture, return 4 GLchans */
+static void FETCH(f_argb1555_rev)( const struct swrast_texture_image *texImage,
+                                   GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLushort *src = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
+   const GLushort s = (*src << 8) | (*src >> 8); /* byteswap */
+   texel[RCOMP] = UBYTE_TO_FLOAT( ((s >>  7) & 0xf8) | ((s >> 12) & 0x7) );
+   texel[GCOMP] = UBYTE_TO_FLOAT( ((s >>  2) & 0xf8) | ((s >>  7) & 0x7) );
+   texel[BCOMP] = UBYTE_TO_FLOAT( ((s <<  3) & 0xf8) | ((s >>  2) & 0x7) );
+   texel[ACOMP] = UBYTE_TO_FLOAT( ((s >> 15) & 0x01) * 255 );
+}
+
+
+
+
+/* MESA_FORMAT_ARGB2101010 ***************************************************/
+
+/* Fetch texel from 1D, 2D or 3D argb2101010 texture, return 4 GLchans */
+static void FETCH(f_argb2101010)( const struct swrast_texture_image *texImage,
+                                  GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLuint *src = TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
+   const GLuint s = *src;
+   texel[RCOMP] = ((s >> 20) & 0x3ff) * (1.0F / 1023.0F);
+   texel[GCOMP] = ((s >> 10) & 0x3ff) * (1.0F / 1023.0F);
+   texel[BCOMP] = ((s >>  0) & 0x3ff) * (1.0F / 1023.0F);
+   texel[ACOMP] = ((s >> 30) & 0x03) * (1.0F / 3.0F);
+}
+
+
+
+
+/* MESA_FORMAT_GR88 **********************************************************/
+
+/* Fetch texel from 1D, 2D or 3D rg88 texture, return 4 GLchans */
+static void FETCH(f_gr88)( const struct swrast_texture_image *texImage,
+                           GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLushort s = *TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
+   texel[RCOMP] = UBYTE_TO_FLOAT( s & 0xff );
+   texel[GCOMP] = UBYTE_TO_FLOAT( s >> 8 );
+   texel[BCOMP] = 0.0;
+   texel[ACOMP] = 1.0;
+}
+
+
+
+
+/* MESA_FORMAT_RG88 ******************************************************/
+
+/* Fetch texel from 1D, 2D or 3D rg88_rev texture, return 4 GLchans */
+static void FETCH(f_rg88)( const struct swrast_texture_image *texImage,
+                           GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLushort s = *TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
+   texel[RCOMP] = UBYTE_TO_FLOAT( s >> 8 );
+   texel[GCOMP] = UBYTE_TO_FLOAT( s & 0xff );
+   texel[BCOMP] = 0.0;
+   texel[ACOMP] = 1.0;
+}
+
+
+
+
+/* MESA_FORMAT_AL44 **********************************************************/
+
+/* Fetch texel from 1D, 2D or 3D al44 texture, return 4 GLchans */
+static void FETCH(f_al44)( const struct swrast_texture_image *texImage,
+                           GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLubyte s = *TEXEL_ADDR(GLubyte, texImage, i, j, k, 1);
+   texel[RCOMP] =
+   texel[GCOMP] =
+   texel[BCOMP] = (s & 0xf) * (1.0F / 15.0F);
+   texel[ACOMP] = ((s >> 4) & 0xf) * (1.0F / 15.0F);
+}
+
+
+
+
+/* MESA_FORMAT_AL88 **********************************************************/
+
+/* Fetch texel from 1D, 2D or 3D al88 texture, return 4 GLchans */
+static void FETCH(f_al88)( const struct swrast_texture_image *texImage,
+                           GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLushort s = *TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
+   texel[RCOMP] = 
+   texel[GCOMP] = 
+   texel[BCOMP] = UBYTE_TO_FLOAT( s & 0xff );
+   texel[ACOMP] = UBYTE_TO_FLOAT( s >> 8 );
+}
+
+
+
+
+/* MESA_FORMAT_R8 ************************************************************/
+
+/* Fetch texel from 1D, 2D or 3D rg88 texture, return 4 GLchans */
+static void FETCH(f_r8)(const struct swrast_texture_image *texImage,
+			GLint i, GLint j, GLint k, GLfloat *texel)
+{
+   const GLubyte s = *TEXEL_ADDR(GLubyte, texImage, i, j, k, 1);
+   texel[RCOMP] = UBYTE_TO_FLOAT(s);
+   texel[GCOMP] = 0.0;
+   texel[BCOMP] = 0.0;
+   texel[ACOMP] = 1.0;
+}
+
+
+
+
+/* MESA_FORMAT_R16 ***********************************************************/
+
+/* Fetch texel from 1D, 2D or 3D r16 texture, return 4 GLchans */
+static void FETCH(f_r16)(const struct swrast_texture_image *texImage,
+			GLint i, GLint j, GLint k, GLfloat *texel)
+{
+   const GLushort s = *TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
+   texel[RCOMP] = USHORT_TO_FLOAT(s);
+   texel[GCOMP] = 0.0;
+   texel[BCOMP] = 0.0;
+   texel[ACOMP] = 1.0;
+}
+
+
+
+
+/* MESA_FORMAT_AL88_REV ******************************************************/
+
+/* Fetch texel from 1D, 2D or 3D al88_rev texture, return 4 GLchans */
+static void FETCH(f_al88_rev)( const struct swrast_texture_image *texImage,
+                               GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLushort s = *TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
+   texel[RCOMP] = 
+   texel[GCOMP] = 
+   texel[BCOMP] = UBYTE_TO_FLOAT( s >> 8 );
+   texel[ACOMP] = UBYTE_TO_FLOAT( s & 0xff );
+}
+
+
+
+
+/* MESA_FORMAT_GR1616 ********************************************************/
+
+/* Fetch texel from 1D, 2D or 3D rg1616 texture, return 4 GLchans */
+static void FETCH(f_rg1616)( const struct swrast_texture_image *texImage,
+                           GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLuint s = *TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
+   texel[RCOMP] = USHORT_TO_FLOAT( s & 0xffff );
+   texel[GCOMP] = USHORT_TO_FLOAT( s >> 16 );
+   texel[BCOMP] = 0.0;
+   texel[ACOMP] = 1.0;
+}
+
+
+
+
+/* MESA_FORMAT_RG1616 ****************************************************/
+
+/* Fetch texel from 1D, 2D or 3D rg1616_rev texture, return 4 GLchans */
+static void FETCH(f_rg1616_rev)( const struct swrast_texture_image *texImage,
+                           GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLuint s = *TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
+   texel[RCOMP] = USHORT_TO_FLOAT( s >> 16 );
+   texel[GCOMP] = USHORT_TO_FLOAT( s & 0xffff );
+   texel[BCOMP] = 0.0;
+   texel[ACOMP] = 1.0;
+}
+
+
+
+
+/* MESA_FORMAT_AL1616 ********************************************************/
+
+/* Fetch texel from 1D, 2D or 3D al1616 texture, return 4 GLchans */
+static void FETCH(f_al1616)( const struct swrast_texture_image *texImage,
+			     GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLuint s = *TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
+   texel[RCOMP] =
+   texel[GCOMP] =
+   texel[BCOMP] = USHORT_TO_FLOAT( s & 0xffff );
+   texel[ACOMP] = USHORT_TO_FLOAT( s >> 16 );
+}
+
+
+
+
+/* MESA_FORMAT_AL1616_REV ****************************************************/
+
+/* Fetch texel from 1D, 2D or 3D al1616_rev texture, return 4 GLchans */
+static void FETCH(f_al1616_rev)( const struct swrast_texture_image *texImage,
+				 GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLuint s = *TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
+   texel[RCOMP] =
+   texel[GCOMP] =
+   texel[BCOMP] = USHORT_TO_FLOAT( s >> 16 );
+   texel[ACOMP] = USHORT_TO_FLOAT( s & 0xffff );
+}
+
+
+
+
+/* MESA_FORMAT_RGB332 ********************************************************/
+
+/* Fetch texel from 1D, 2D or 3D rgb332 texture, return 4 GLchans */
+static void FETCH(f_rgb332)( const struct swrast_texture_image *texImage,
+                             GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLubyte *src = TEXEL_ADDR(GLubyte, texImage, i, j, k, 1);
+   const GLubyte s = *src;
+   texel[RCOMP] = ((s >> 5) & 0x7) * (1.0F / 7.0F);
+   texel[GCOMP] = ((s >> 2) & 0x7) * (1.0F / 7.0F);
+   texel[BCOMP] = ((s     ) & 0x3) * (1.0F / 3.0F);
+   texel[ACOMP] = 1.0F;
+}
+
+
+
+
+/* MESA_FORMAT_A8 ************************************************************/
+
+/* Fetch texel from 1D, 2D or 3D a8 texture, return 4 GLchans */
+static void FETCH(f_a8)( const struct swrast_texture_image *texImage,
+                         GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLubyte *src = TEXEL_ADDR(GLubyte, texImage, i, j, k, 1);
+   texel[RCOMP] =
+   texel[GCOMP] =
+   texel[BCOMP] = 0.0F;
+   texel[ACOMP] = UBYTE_TO_FLOAT( src[0] );
+}
+
+
+
+
+/* MESA_FORMAT_A16 ************************************************************/
+
+/* Fetch texel from 1D, 2D or 3D a8 texture, return 4 GLchans */
+static void FETCH(f_a16)( const struct swrast_texture_image *texImage,
+                          GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLushort *src = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
+   texel[RCOMP] =
+   texel[GCOMP] =
+   texel[BCOMP] = 0.0F;
+   texel[ACOMP] = USHORT_TO_FLOAT( src[0] );
+}
+
+
+
+
+/* MESA_FORMAT_L8 ************************************************************/
+
+/* Fetch texel from 1D, 2D or 3D l8 texture, return 4 GLchans */
+static void FETCH(f_l8)( const struct swrast_texture_image *texImage,
+                         GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLubyte *src = TEXEL_ADDR(GLubyte, texImage, i, j, k, 1);
+   texel[RCOMP] =
+   texel[GCOMP] =
+   texel[BCOMP] = UBYTE_TO_FLOAT( src[0] );
+   texel[ACOMP] = 1.0F;
+}
+
+
+
+
+/* MESA_FORMAT_L16 ***********************************************************/
+
+/* Fetch texel from 1D, 2D or 3D l16 texture, return 4 GLchans */
+static void FETCH(f_l16)( const struct swrast_texture_image *texImage,
+                          GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLushort *src = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
+   texel[RCOMP] =
+   texel[GCOMP] =
+   texel[BCOMP] = USHORT_TO_FLOAT( src[0] );
+   texel[ACOMP] = 1.0F;
+}
+
+
+
+
+/* MESA_FORMAT_I8 ************************************************************/
+
+/* Fetch texel from 1D, 2D or 3D i8 texture, return 4 GLchans */
+static void FETCH(f_i8)( const struct swrast_texture_image *texImage,
+                         GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLubyte *src = TEXEL_ADDR(GLubyte, texImage, i, j, k, 1);
+   texel[RCOMP] =
+   texel[GCOMP] =
+   texel[BCOMP] =
+   texel[ACOMP] = UBYTE_TO_FLOAT( src[0] );
+}
+
+
+
+
+/* MESA_FORMAT_I16 ***********************************************************/
+
+/* Fetch texel from 1D, 2D or 3D i16 texture, return 4 GLchans */
+static void FETCH(f_i16)( const struct swrast_texture_image *texImage,
+                          GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLushort *src = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
+   texel[RCOMP] =
+   texel[GCOMP] =
+   texel[BCOMP] =
+   texel[ACOMP] = USHORT_TO_FLOAT( src[0] );
+}
+
+
+
+
+/* Fetch texel from 1D, 2D or 3D srgb8 texture, return 4 GLfloats */
+/* Note: component order is same as for MESA_FORMAT_RGB888 */
+static void FETCH(srgb8)(const struct swrast_texture_image *texImage,
+                         GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLubyte *src = TEXEL_ADDR(GLubyte, texImage, i, j, k, 3);
+   texel[RCOMP] = nonlinear_to_linear(src[2]);
+   texel[GCOMP] = nonlinear_to_linear(src[1]);
+   texel[BCOMP] = nonlinear_to_linear(src[0]);
+   texel[ACOMP] = 1.0F;
+}
+
+
+
+/* Fetch texel from 1D, 2D or 3D srgba8 texture, return 4 GLfloats */
+static void FETCH(srgba8)(const struct swrast_texture_image *texImage,
+                          GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLuint s = *TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
+   texel[RCOMP] = nonlinear_to_linear( (s >> 24) );
+   texel[GCOMP] = nonlinear_to_linear( (s >> 16) & 0xff );
+   texel[BCOMP] = nonlinear_to_linear( (s >>  8) & 0xff );
+   texel[ACOMP] = UBYTE_TO_FLOAT( (s      ) & 0xff ); /* linear! */
+}
+
+
+
+/* Fetch texel from 1D, 2D or 3D sargb8 texture, return 4 GLfloats */
+static void FETCH(sargb8)(const struct swrast_texture_image *texImage,
+                          GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLuint s = *TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
+   texel[RCOMP] = nonlinear_to_linear( (s >> 16) & 0xff );
+   texel[GCOMP] = nonlinear_to_linear( (s >>  8) & 0xff );
+   texel[BCOMP] = nonlinear_to_linear( (s      ) & 0xff );
+   texel[ACOMP] = UBYTE_TO_FLOAT( (s >> 24) ); /* linear! */
+}
+
+
+
+/* Fetch texel from 1D, 2D or 3D sl8 texture, return 4 GLfloats */
+static void FETCH(sl8)(const struct swrast_texture_image *texImage,
+                       GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLubyte *src = TEXEL_ADDR(GLubyte, texImage, i, j, k, 1);
+   texel[RCOMP] = 
+   texel[GCOMP] = 
+   texel[BCOMP] = nonlinear_to_linear(src[0]);
+   texel[ACOMP] = 1.0F;
+}
+
+
+
+/* Fetch texel from 1D, 2D or 3D sla8 texture, return 4 GLfloats */
+static void FETCH(sla8)(const struct swrast_texture_image *texImage,
+                       GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLubyte *src = TEXEL_ADDR(GLubyte, texImage, i, j, k, 2);
+   texel[RCOMP] =
+   texel[GCOMP] =
+   texel[BCOMP] = nonlinear_to_linear(src[0]);
+   texel[ACOMP] = UBYTE_TO_FLOAT(src[1]); /* linear */
+}
+
+
+
+
+/* MESA_FORMAT_RGBA_INT8 **************************************************/
+
+static void
+FETCH(rgba_int8)(const struct swrast_texture_image *texImage,
+                 GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLbyte *src = TEXEL_ADDR(GLbyte, texImage, i, j, k, 4);
+   texel[RCOMP] = (GLfloat) src[0];
+   texel[GCOMP] = (GLfloat) src[1];
+   texel[BCOMP] = (GLfloat) src[2];
+   texel[ACOMP] = (GLfloat) src[3];
+}
+
+
+
+
+/* MESA_FORMAT_RGBA_INT16 **************************************************/
+
+static void
+FETCH(rgba_int16)(const struct swrast_texture_image *texImage,
+                  GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLshort *src = TEXEL_ADDR(GLshort, texImage, i, j, k, 4);
+   texel[RCOMP] = (GLfloat) src[0];
+   texel[GCOMP] = (GLfloat) src[1];
+   texel[BCOMP] = (GLfloat) src[2];
+   texel[ACOMP] = (GLfloat) src[3];
+}
+
+
+
+
+/* MESA_FORMAT_RGBA_INT32 **************************************************/
+
+static void
+FETCH(rgba_int32)(const struct swrast_texture_image *texImage,
+                  GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLint *src = TEXEL_ADDR(GLint, texImage, i, j, k, 4);
+   texel[RCOMP] = (GLfloat) src[0];
+   texel[GCOMP] = (GLfloat) src[1];
+   texel[BCOMP] = (GLfloat) src[2];
+   texel[ACOMP] = (GLfloat) src[3];
+}
+
+
+
+
+/* MESA_FORMAT_RGBA_UINT8 **************************************************/
+
+static void
+FETCH(rgba_uint8)(const struct swrast_texture_image *texImage,
+                 GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLubyte *src = TEXEL_ADDR(GLubyte, texImage, i, j, k, 4);
+   texel[RCOMP] = (GLfloat) src[0];
+   texel[GCOMP] = (GLfloat) src[1];
+   texel[BCOMP] = (GLfloat) src[2];
+   texel[ACOMP] = (GLfloat) src[3];
+}
+
+
+
+
+/* MESA_FORMAT_RGBA_UINT16 **************************************************/
+
+static void
+FETCH(rgba_uint16)(const struct swrast_texture_image *texImage,
+                  GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLushort *src = TEXEL_ADDR(GLushort, texImage, i, j, k, 4);
+   texel[RCOMP] = (GLfloat) src[0];
+   texel[GCOMP] = (GLfloat) src[1];
+   texel[BCOMP] = (GLfloat) src[2];
+   texel[ACOMP] = (GLfloat) src[3];
+}
+
+
+
+
+/* MESA_FORMAT_RGBA_UINT32 **************************************************/
+
+static void
+FETCH(rgba_uint32)(const struct swrast_texture_image *texImage,
+                  GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLuint *src = TEXEL_ADDR(GLuint, texImage, i, j, k, 4);
+   texel[RCOMP] = (GLfloat) src[0];
+   texel[GCOMP] = (GLfloat) src[1];
+   texel[BCOMP] = (GLfloat) src[2];
+   texel[ACOMP] = (GLfloat) src[3];
+}
+
+
+
+
+/* MESA_FORMAT_DUDV8 ********************************************************/
+
+/* this format by definition produces 0,0,0,1 as rgba values,
+   however we'll return the dudv values as rg and fix up elsewhere */
+static void FETCH(dudv8)(const struct swrast_texture_image *texImage,
+                         GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLbyte *src = TEXEL_ADDR(GLbyte, texImage, i, j, k, 2);
+   texel[RCOMP] = BYTE_TO_FLOAT(src[0]);
+   texel[GCOMP] = BYTE_TO_FLOAT(src[1]);
+   texel[BCOMP] = 0;
+   texel[ACOMP] = 0;
+}
+
+
+/* MESA_FORMAT_SIGNED_R8 ***********************************************/
+
+static void FETCH(signed_r8)( const struct swrast_texture_image *texImage,
+                              GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLbyte s = *TEXEL_ADDR(GLbyte, texImage, i, j, k, 1);
+   texel[RCOMP] = BYTE_TO_FLOAT_TEX( s );
+   texel[GCOMP] = 0.0F;
+   texel[BCOMP] = 0.0F;
+   texel[ACOMP] = 1.0F;
+}
+
+
+
+
+/* MESA_FORMAT_SIGNED_A8 ***********************************************/
+
+static void FETCH(signed_a8)( const struct swrast_texture_image *texImage,
+                              GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLbyte s = *TEXEL_ADDR(GLbyte, texImage, i, j, k, 1);
+   texel[RCOMP] = 0.0F;
+   texel[GCOMP] = 0.0F;
+   texel[BCOMP] = 0.0F;
+   texel[ACOMP] = BYTE_TO_FLOAT_TEX( s );
+}
+
+
+
+
+/* MESA_FORMAT_SIGNED_L8 ***********************************************/
+
+static void FETCH(signed_l8)( const struct swrast_texture_image *texImage,
+                              GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLbyte s = *TEXEL_ADDR(GLbyte, texImage, i, j, k, 1);
+   texel[RCOMP] =
+   texel[GCOMP] =
+   texel[BCOMP] = BYTE_TO_FLOAT_TEX( s );
+   texel[ACOMP] = 1.0F;
+}
+
+
+
+
+/* MESA_FORMAT_SIGNED_I8 ***********************************************/
+
+static void FETCH(signed_i8)( const struct swrast_texture_image *texImage,
+                              GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLbyte s = *TEXEL_ADDR(GLbyte, texImage, i, j, k, 1);
+   texel[RCOMP] =
+   texel[GCOMP] =
+   texel[BCOMP] =
+   texel[ACOMP] = BYTE_TO_FLOAT_TEX( s );
+}
+
+
+
+
+/* MESA_FORMAT_SIGNED_RG88_REV ***********************************************/
+
+static void FETCH(signed_rg88_rev)( const struct swrast_texture_image *texImage,
+                                    GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLushort s = *TEXEL_ADDR(GLshort, texImage, i, j, k, 1);
+   texel[RCOMP] = BYTE_TO_FLOAT_TEX( (GLbyte) (s & 0xff) );
+   texel[GCOMP] = BYTE_TO_FLOAT_TEX( (GLbyte) (s >> 8) );
+   texel[BCOMP] = 0.0F;
+   texel[ACOMP] = 1.0F;
+}
+
+
+
+
+/* MESA_FORMAT_SIGNED_AL88 ***********************************************/
+
+static void FETCH(signed_al88)( const struct swrast_texture_image *texImage,
+                                GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLushort s = *TEXEL_ADDR(GLshort, texImage, i, j, k, 1);
+   texel[RCOMP] =
+   texel[GCOMP] =
+   texel[BCOMP] = BYTE_TO_FLOAT_TEX( (GLbyte) (s & 0xff) );
+   texel[ACOMP] = BYTE_TO_FLOAT_TEX( (GLbyte) (s >> 8) );
+}
+
+
+
+
+/* MESA_FORMAT_SIGNED_RGBX8888 ***********************************************/
+
+static void FETCH(signed_rgbx8888)( const struct swrast_texture_image *texImage,
+			            GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLuint s = *TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
+   texel[RCOMP] = BYTE_TO_FLOAT_TEX( (GLbyte) (s >> 24) );
+   texel[GCOMP] = BYTE_TO_FLOAT_TEX( (GLbyte) (s >> 16) );
+   texel[BCOMP] = BYTE_TO_FLOAT_TEX( (GLbyte) (s >>  8) );
+   texel[ACOMP] = 1.0f;
+}
+
+
+
+
+/* MESA_FORMAT_SIGNED_RGBA8888 ***********************************************/
+
+static void FETCH(signed_rgba8888)( const struct swrast_texture_image *texImage,
+			            GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLuint s = *TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
+   texel[RCOMP] = BYTE_TO_FLOAT_TEX( (GLbyte) (s >> 24) );
+   texel[GCOMP] = BYTE_TO_FLOAT_TEX( (GLbyte) (s >> 16) );
+   texel[BCOMP] = BYTE_TO_FLOAT_TEX( (GLbyte) (s >>  8) );
+   texel[ACOMP] = BYTE_TO_FLOAT_TEX( (GLbyte) (s      ) );
+}
+
+
+
+static void FETCH(signed_rgba8888_rev)( const struct swrast_texture_image *texImage,
+                                        GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLuint s = *TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
+   texel[RCOMP] = BYTE_TO_FLOAT_TEX( (GLbyte) (s      ) );
+   texel[GCOMP] = BYTE_TO_FLOAT_TEX( (GLbyte) (s >>  8) );
+   texel[BCOMP] = BYTE_TO_FLOAT_TEX( (GLbyte) (s >> 16) );
+   texel[ACOMP] = BYTE_TO_FLOAT_TEX( (GLbyte) (s >> 24) );
+}
+
+
+
+
+
+/* MESA_FORMAT_SIGNED_R16 ***********************************************/
+
+static void
+FETCH(signed_r16)(const struct swrast_texture_image *texImage,
+                  GLint i, GLint j, GLint k, GLfloat *texel)
+{
+   const GLshort s = *TEXEL_ADDR(GLshort, texImage, i, j, k, 1);
+   texel[RCOMP] = SHORT_TO_FLOAT_TEX( s );
+   texel[GCOMP] = 0.0F;
+   texel[BCOMP] = 0.0F;
+   texel[ACOMP] = 1.0F;
+}
+
+
+
+
+/* MESA_FORMAT_SIGNED_A16 ***********************************************/
+
+static void
+FETCH(signed_a16)(const struct swrast_texture_image *texImage,
+                  GLint i, GLint j, GLint k, GLfloat *texel)
+{
+   const GLshort s = *TEXEL_ADDR(GLshort, texImage, i, j, k, 1);
+   texel[RCOMP] = 0.0F;
+   texel[GCOMP] = 0.0F;
+   texel[BCOMP] = 0.0F;
+   texel[ACOMP] = SHORT_TO_FLOAT_TEX( s );
+}
+
+
+
+
+/* MESA_FORMAT_SIGNED_L16 ***********************************************/
+
+static void
+FETCH(signed_l16)(const struct swrast_texture_image *texImage,
+                  GLint i, GLint j, GLint k, GLfloat *texel)
+{
+   const GLshort s = *TEXEL_ADDR(GLshort, texImage, i, j, k, 1);
+   texel[RCOMP] =
+   texel[GCOMP] =
+   texel[BCOMP] = SHORT_TO_FLOAT_TEX( s );
+   texel[ACOMP] = 1.0F;
+}
+
+
+
+
+/* MESA_FORMAT_SIGNED_I16 ***********************************************/
+
+static void
+FETCH(signed_i16)(const struct swrast_texture_image *texImage,
+                  GLint i, GLint j, GLint k, GLfloat *texel)
+{
+   const GLshort s = *TEXEL_ADDR(GLshort, texImage, i, j, k, 1);
+   texel[RCOMP] =
+   texel[GCOMP] =
+   texel[BCOMP] =
+   texel[ACOMP] = SHORT_TO_FLOAT_TEX( s );
+}
+
+
+
+
+/* MESA_FORMAT_SIGNED_RG1616 ***********************************************/
+
+static void
+FETCH(signed_rg1616)(const struct swrast_texture_image *texImage,
+                    GLint i, GLint j, GLint k, GLfloat *texel)
+{
+   const GLshort *s = TEXEL_ADDR(GLshort, texImage, i, j, k, 2);
+   texel[RCOMP] = SHORT_TO_FLOAT_TEX( s[0] );
+   texel[GCOMP] = SHORT_TO_FLOAT_TEX( s[1] );
+   texel[BCOMP] = 0.0F;
+   texel[ACOMP] = 1.0F;
+}
+
+
+
+
+/* MESA_FORMAT_SIGNED_AL1616 ***********************************************/
+
+static void
+FETCH(signed_al1616)(const struct swrast_texture_image *texImage,
+                    GLint i, GLint j, GLint k, GLfloat *texel)
+{
+   const GLshort *s = TEXEL_ADDR(GLshort, texImage, i, j, k, 2);
+   texel[RCOMP] =
+   texel[GCOMP] =
+   texel[BCOMP] = SHORT_TO_FLOAT_TEX( s[0] );
+   texel[ACOMP] = SHORT_TO_FLOAT_TEX( s[1] );
+}
+
+
+
+
+/* MESA_FORMAT_SIGNED_RGB_16 ***********************************************/
+
+static void 
+FETCH(signed_rgb_16)(const struct swrast_texture_image *texImage,
+                     GLint i, GLint j, GLint k, GLfloat *texel)
+{
+   const GLshort *s = TEXEL_ADDR(GLshort, texImage, i, j, k, 3);
+   texel[RCOMP] = SHORT_TO_FLOAT_TEX( s[0] );
+   texel[GCOMP] = SHORT_TO_FLOAT_TEX( s[1] );
+   texel[BCOMP] = SHORT_TO_FLOAT_TEX( s[2] );
+   texel[ACOMP] = 1.0F;
+}
+
+
+
+
+/* MESA_FORMAT_SIGNED_RGBA_16 ***********************************************/
+
+static void
+FETCH(signed_rgba_16)(const struct swrast_texture_image *texImage,
+                      GLint i, GLint j, GLint k, GLfloat *texel)
+{
+   const GLshort *s = TEXEL_ADDR(GLshort, texImage, i, j, k, 4);
+   texel[RCOMP] = SHORT_TO_FLOAT_TEX( s[0] );
+   texel[GCOMP] = SHORT_TO_FLOAT_TEX( s[1] );
+   texel[BCOMP] = SHORT_TO_FLOAT_TEX( s[2] );
+   texel[ACOMP] = SHORT_TO_FLOAT_TEX( s[3] );
+}
+
+
+
+
+
+/* MESA_FORMAT_RGBA_16 ***********************************************/
+
+static void
+FETCH(rgba_16)(const struct swrast_texture_image *texImage,
+               GLint i, GLint j, GLint k, GLfloat *texel)
+{
+   const GLushort *s = TEXEL_ADDR(GLushort, texImage, i, j, k, 4);
+   texel[RCOMP] = USHORT_TO_FLOAT( s[0] );
+   texel[GCOMP] = USHORT_TO_FLOAT( s[1] );
+   texel[BCOMP] = USHORT_TO_FLOAT( s[2] );
+   texel[ACOMP] = USHORT_TO_FLOAT( s[3] );
+}
+
+
+
+/* MESA_FORMAT_XBGR.... **********************************************/
+
+static void
+FETCH(xbgr16161616_unorm)(const struct swrast_texture_image *texImage,
+                          GLint i, GLint j, GLint k, GLfloat *texel)
+{
+   const GLushort *s = TEXEL_ADDR(GLushort, texImage, i, j, k, 4);
+   texel[RCOMP] = USHORT_TO_FLOAT(s[0]);
+   texel[GCOMP] = USHORT_TO_FLOAT(s[1]);
+   texel[BCOMP] = USHORT_TO_FLOAT(s[2]);
+   texel[ACOMP] = 1.0f;
+}
+
+static void
+FETCH(xbgr16161616_float)(const struct swrast_texture_image *texImage,
+                          GLint i, GLint j, GLint k, GLfloat *texel)
+{
+   const GLhalfARB *s = TEXEL_ADDR(GLhalfARB, texImage, i, j, k, 4);
+   texel[RCOMP] = _mesa_half_to_float(s[0]);
+   texel[GCOMP] = _mesa_half_to_float(s[1]);
+   texel[BCOMP] = _mesa_half_to_float(s[2]);
+   texel[ACOMP] = 1.0f;
+}
+
+static void
+FETCH(xbgr32323232_float)(const struct swrast_texture_image *texImage,
+                          GLint i, GLint j, GLint k, GLfloat *texel)
+{
+   const GLfloat *s = TEXEL_ADDR(GLfloat, texImage, i, j, k, 4);
+   texel[RCOMP] = s[0];
+   texel[GCOMP] = s[1];
+   texel[BCOMP] = s[2];
+   texel[ACOMP] = 1.0f;
+}
+
+/* XXX other XBGR formats need to be implemented here */
+
+
+
+/* MESA_FORMAT_YCBCR *********************************************************/
+
+/* Fetch texel from 1D, 2D or 3D ycbcr texture, return 4 GLfloats.
+ * We convert YCbCr to RGB here.
+ */
+static void FETCH(f_ycbcr)( const struct swrast_texture_image *texImage,
+                            GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLushort *src0 = TEXEL_ADDR(GLushort, texImage, (i & ~1), j, k, 1); /* even */
+   const GLushort *src1 = src0 + 1;                               /* odd */
+   const GLubyte y0 = (*src0 >> 8) & 0xff;  /* luminance */
+   const GLubyte cb = *src0 & 0xff;         /* chroma U */
+   const GLubyte y1 = (*src1 >> 8) & 0xff;  /* luminance */
+   const GLubyte cr = *src1 & 0xff;         /* chroma V */
+   const GLubyte y = (i & 1) ? y1 : y0;     /* choose even/odd luminance */
+   GLfloat r = 1.164F * (y - 16) + 1.596F * (cr - 128);
+   GLfloat g = 1.164F * (y - 16) - 0.813F * (cr - 128) - 0.391F * (cb - 128);
+   GLfloat b = 1.164F * (y - 16) + 2.018F * (cb - 128);
+   r *= (1.0F / 255.0F);
+   g *= (1.0F / 255.0F);
+   b *= (1.0F / 255.0F);
+   texel[RCOMP] = CLAMP(r, 0.0F, 1.0F);
+   texel[GCOMP] = CLAMP(g, 0.0F, 1.0F);
+   texel[BCOMP] = CLAMP(b, 0.0F, 1.0F);
+   texel[ACOMP] = 1.0F;
+}
+
+
+
+
+/* MESA_FORMAT_YCBCR_REV *****************************************************/
+
+/* Fetch texel from 1D, 2D or 3D ycbcr_rev texture, return 4 GLfloats.
+ * We convert YCbCr to RGB here.
+ */
+static void FETCH(f_ycbcr_rev)( const struct swrast_texture_image *texImage,
+                                GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLushort *src0 = TEXEL_ADDR(GLushort, texImage, (i & ~1), j, k, 1); /* even */
+   const GLushort *src1 = src0 + 1;                               /* odd */
+   const GLubyte y0 = *src0 & 0xff;         /* luminance */
+   const GLubyte cr = (*src0 >> 8) & 0xff;  /* chroma V */
+   const GLubyte y1 = *src1 & 0xff;         /* luminance */
+   const GLubyte cb = (*src1 >> 8) & 0xff;  /* chroma U */
+   const GLubyte y = (i & 1) ? y1 : y0;     /* choose even/odd luminance */
+   GLfloat r = 1.164F * (y - 16) + 1.596F * (cr - 128);
+   GLfloat g = 1.164F * (y - 16) - 0.813F * (cr - 128) - 0.391F * (cb - 128);
+   GLfloat b = 1.164F * (y - 16) + 2.018F * (cb - 128);
+   r *= (1.0F / 255.0F);
+   g *= (1.0F / 255.0F);
+   b *= (1.0F / 255.0F);
+   texel[RCOMP] = CLAMP(r, 0.0F, 1.0F);
+   texel[GCOMP] = CLAMP(g, 0.0F, 1.0F);
+   texel[BCOMP] = CLAMP(b, 0.0F, 1.0F);
+   texel[ACOMP] = 1.0F;
+}
+
+
+
+
+/* MESA_TEXFORMAT_Z24_S8 ***************************************************/
+
+static void FETCH(f_z24_s8)( const struct swrast_texture_image *texImage,
+                             GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   /* only return Z, not stencil data */
+   const GLuint *src = TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
+   const GLdouble scale = 1.0 / (GLdouble) 0xffffff;
+   texel[0] = ((*src) >> 8) * scale;
+   ASSERT(texImage->Base.TexFormat == MESA_FORMAT_Z24_S8 ||
+	  texImage->Base.TexFormat == MESA_FORMAT_Z24_X8);
+   ASSERT(texel[0] >= 0.0F);
+   ASSERT(texel[0] <= 1.0F);
+}
+
+
+
+
+/* MESA_TEXFORMAT_S8_Z24 ***************************************************/
+
+static void FETCH(f_s8_z24)( const struct swrast_texture_image *texImage,
+                             GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   /* only return Z, not stencil data */
+   const GLuint *src = TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
+   const GLdouble scale = 1.0 / (GLdouble) 0xffffff;
+   texel[0] = ((*src) & 0x00ffffff) * scale;
+   ASSERT(texImage->Base.TexFormat == MESA_FORMAT_S8_Z24 ||
+	  texImage->Base.TexFormat == MESA_FORMAT_X8_Z24);
+   ASSERT(texel[0] >= 0.0F);
+   ASSERT(texel[0] <= 1.0F);
+}
+
+
+
+
+/* MESA_FORMAT_RGB9_E5 ******************************************************/
+
+static void FETCH(rgb9_e5)( const struct swrast_texture_image *texImage,
+                            GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLuint *src = TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
+   rgb9e5_to_float3(*src, texel);
+   texel[ACOMP] = 1.0F;
+}
+
+
+
+
+/* MESA_FORMAT_R11_G11_B10_FLOAT *********************************************/
+
+static void FETCH(r11_g11_b10f)( const struct swrast_texture_image *texImage,
+                                 GLint i, GLint j, GLint k, GLfloat *texel )
+{
+   const GLuint *src = TEXEL_ADDR(GLuint, texImage, i, j, k, 1);
+   r11g11b10f_to_float3(*src, texel);
+   texel[ACOMP] = 1.0F;
+}
+
+
+
+
+/* MESA_FORMAT_Z32_FLOAT_X24S8 ***********************************************/
+
+static void FETCH(z32f_x24s8)(const struct swrast_texture_image *texImage,
+			      GLint i, GLint j, GLint k, GLfloat *texel)
+{
+   const GLfloat *src = TEXEL_ADDR(GLfloat, texImage, i, j, k, 2);
+   texel[RCOMP] = src[0];
+   texel[GCOMP] = 0.0F;
+   texel[BCOMP] = 0.0F;
+   texel[ACOMP] = 1.0F;
+}
+
+
+
+#undef TEXEL_ADDR
+#undef DIM
+#undef FETCH
diff --git a/dist/Mesa/src/mesa/swrast/s_texture.c b/dist/Mesa/src/mesa/swrast/s_texture.c
new file mode 100644
index 000000000..27803c553
--- /dev/null
+++ b/dist/Mesa/src/mesa/swrast/s_texture.c
@@ -0,0 +1,377 @@
+/*
+ * Mesa 3-D graphics library
+ *
+ * Copyright (C) 2011 VMware, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/**
+ * Functions for mapping/unmapping texture images.
+ */
+
+
+#include "main/context.h"
+#include "main/fbobject.h"
+#include "main/teximage.h"
+#include "main/texobj.h"
+#include "swrast/swrast.h"
+#include "swrast/s_context.h"
+
+
+/**
+ * Allocate a new swrast_texture_image (a subclass of gl_texture_image).
+ * Called via ctx->Driver.NewTextureImage().
+ */
+struct gl_texture_image *
+_swrast_new_texture_image( struct gl_context *ctx )
+{
+   (void) ctx;
+   return (struct gl_texture_image *) CALLOC_STRUCT(swrast_texture_image);
+}
+
+
+/**
+ * Free a swrast_texture_image (a subclass of gl_texture_image).
+ * Called via ctx->Driver.DeleteTextureImage().
+ */
+void
+_swrast_delete_texture_image(struct gl_context *ctx,
+                             struct gl_texture_image *texImage)
+{
+   /* Nothing special for the subclass yet */
+   _mesa_delete_texture_image(ctx, texImage);
+}
+
+static unsigned int
+texture_slices(struct gl_texture_image *texImage)
+{
+   if (texImage->TexObject->Target == GL_TEXTURE_1D_ARRAY)
+      return texImage->Height;
+   else
+      return texImage->Depth;
+}
+
+unsigned int
+_swrast_teximage_slice_height(struct gl_texture_image *texImage)
+{
+   /* For 1D array textures, the slices are all 1 pixel high, and Height is
+    * the number of slices.
+    */
+   if (texImage->TexObject->Target == GL_TEXTURE_1D_ARRAY)
+      return 1;
+   else
+      return texImage->Height;
+}
+
+/**
+ * Called via ctx->Driver.AllocTextureImageBuffer()
+ */
+GLboolean
+_swrast_alloc_texture_image_buffer(struct gl_context *ctx,
+                                   struct gl_texture_image *texImage)
+{
+   struct swrast_texture_image *swImg = swrast_texture_image(texImage);
+   GLuint bytesPerSlice;
+   GLuint slices = texture_slices(texImage);
+   GLuint i;
+
+   if (!_swrast_init_texture_image(texImage))
+      return GL_FALSE;
+
+   bytesPerSlice = _mesa_format_image_size(texImage->TexFormat, texImage->Width,
+                                           _swrast_teximage_slice_height(texImage), 1);
+
+   assert(!swImg->Buffer);
+   swImg->Buffer = _mesa_align_malloc(bytesPerSlice * slices, 512);
+   if (!swImg->Buffer)
+      return GL_FALSE;
+
+   /* RowStride and ImageSlices[] describe how to address texels in 'Data' */
+   swImg->RowStride = _mesa_format_row_stride(texImage->TexFormat,
+                                              texImage->Width);
+
+   for (i = 0; i < slices; i++) {
+      swImg->ImageSlices[i] = swImg->Buffer + bytesPerSlice * i;
+   }
+
+   return GL_TRUE;
+}
+
+
+/**
+ * Code that overrides ctx->Driver.AllocTextureImageBuffer may use this to
+ * initialize the fields of swrast_texture_image without allocating the image
+ * buffer or initializing RowStride or the contents of ImageSlices.
+ *
+ * Returns GL_TRUE on success, GL_FALSE on memory allocation failure.
+ */
+GLboolean
+_swrast_init_texture_image(struct gl_texture_image *texImage)
+{
+   struct swrast_texture_image *swImg = swrast_texture_image(texImage);
+
+   if ((texImage->Width == 1 || _mesa_is_pow_two(texImage->Width2)) &&
+       (texImage->Height == 1 || _mesa_is_pow_two(texImage->Height2)) &&
+       (texImage->Depth == 1 || _mesa_is_pow_two(texImage->Depth2)))
+      swImg->_IsPowerOfTwo = GL_TRUE;
+   else
+      swImg->_IsPowerOfTwo = GL_FALSE;
+
+   /* Compute Width/Height/DepthScale for mipmap lod computation */
+   if (texImage->TexObject->Target == GL_TEXTURE_RECTANGLE_NV) {
+      /* scale = 1.0 since texture coords directly map to texels */
+      swImg->WidthScale = 1.0;
+      swImg->HeightScale = 1.0;
+      swImg->DepthScale = 1.0;
+   }
+   else {
+      swImg->WidthScale = (GLfloat) texImage->Width;
+      swImg->HeightScale = (GLfloat) texImage->Height;
+      swImg->DepthScale = (GLfloat) texImage->Depth;
+   }
+
+   assert(!swImg->ImageSlices);
+   swImg->ImageSlices = calloc(texture_slices(texImage), sizeof(void *));
+   if (!swImg->ImageSlices)
+      return GL_FALSE;
+
+   return GL_TRUE;
+}
+
+
+/**
+ * Called via ctx->Driver.FreeTextureImageBuffer()
+ */
+void
+_swrast_free_texture_image_buffer(struct gl_context *ctx,
+                                  struct gl_texture_image *texImage)
+{
+   struct swrast_texture_image *swImage = swrast_texture_image(texImage);
+   if (swImage->Buffer) {
+      _mesa_align_free(swImage->Buffer);
+      swImage->Buffer = NULL;
+   }
+
+   free(swImage->ImageSlices);
+   swImage->ImageSlices = NULL;
+}
+
+
+/**
+ * Error checking for debugging only.
+ */
+static void
+_mesa_check_map_teximage(struct gl_texture_image *texImage,
+                         GLuint slice, GLuint x, GLuint y, GLuint w, GLuint h)
+{
+
+   if (texImage->TexObject->Target == GL_TEXTURE_1D)
+      assert(y == 0 && h == 1);
+
+   assert(x < texImage->Width || texImage->Width == 0);
+   assert(y < texImage->Height || texImage->Height == 0);
+   assert(x + w <= texImage->Width);
+   assert(y + h <= texImage->Height);
+}
+
+/**
+ * Map a 2D slice of a texture image into user space.
+ * (x,y,w,h) defines a region of interest (ROI).  Reading/writing texels
+ * outside of the ROI is undefined.
+ *
+ * \param texImage  the texture image
+ * \param slice  the 3D image slice or array texture slice
+ * \param x, y, w, h  region of interest
+ * \param mode  bitmask of GL_MAP_READ_BIT, GL_MAP_WRITE_BIT
+ * \param mapOut  returns start of mapping of region of interest
+ * \param rowStrideOut  returns row stride (in bytes)
+ */
+void
+_swrast_map_teximage(struct gl_context *ctx,
+                     struct gl_texture_image *texImage,
+                     GLuint slice,
+                     GLuint x, GLuint y, GLuint w, GLuint h,
+                     GLbitfield mode,
+                     GLubyte **mapOut,
+                     GLint *rowStrideOut)
+{
+   struct swrast_texture_image *swImage = swrast_texture_image(texImage);
+   GLubyte *map;
+   GLint stride, texelSize;
+   GLuint bw, bh;
+
+   _mesa_check_map_teximage(texImage, slice, x, y, w, h);
+
+   texelSize = _mesa_get_format_bytes(texImage->TexFormat);
+   stride = _mesa_format_row_stride(texImage->TexFormat, texImage->Width);
+   _mesa_get_format_block_size(texImage->TexFormat, &bw, &bh);
+
+   assert(x % bw == 0);
+   assert(y % bh == 0);
+
+   if (!swImage->Buffer) {
+      /* probably ran out of memory when allocating tex mem */
+      *mapOut = NULL;
+      return;
+   }
+
+   /* This function can only be used with a swrast-allocated buffer, in which
+    * case ImageSlices is populated with pointers into Buffer.
+    */
+   assert(swImage->Buffer);
+   assert(swImage->Buffer == swImage->ImageSlices[0]);
+
+   assert(slice < texture_slices(texImage));
+   map = swImage->ImageSlices[slice];
+
+   /* apply x/y offset to map address */
+   map += stride * (y / bh) + texelSize * (x / bw);
+
+   *mapOut = map;
+   *rowStrideOut = stride;
+}
+
+void
+_swrast_unmap_teximage(struct gl_context *ctx,
+                       struct gl_texture_image *texImage,
+                       GLuint slice)
+{
+   /* nop */
+}
+
+
+void
+_swrast_map_texture(struct gl_context *ctx, struct gl_texture_object *texObj)
+{
+   const GLuint faces = _mesa_num_tex_faces(texObj->Target);
+   GLuint face, level;
+
+   for (face = 0; face < faces; face++) {
+      for (level = texObj->BaseLevel; level < MAX_TEXTURE_LEVELS; level++) {
+         struct gl_texture_image *texImage = texObj->Image[face][level];
+         struct swrast_texture_image *swImage = swrast_texture_image(texImage);
+         unsigned int i;
+
+         if (!texImage)
+            continue;
+
+         /* In the case of a swrast-allocated texture buffer, the ImageSlices
+          * and RowStride are always available.
+          */
+         if (swImage->Buffer) {
+            assert(swImage->ImageSlices[0] == swImage->Buffer);
+            continue;
+         }
+
+         for (i = 0; i < texture_slices(texImage); i++) {
+            GLubyte *map;
+            GLint rowStride;
+
+            if (swImage->ImageSlices[i])
+               continue;
+
+            ctx->Driver.MapTextureImage(ctx, texImage, i,
+                                        0, 0,
+                                        texImage->Width, texImage->Height,
+                                        GL_MAP_READ_BIT | GL_MAP_WRITE_BIT,
+                                        &map, &rowStride);
+
+            swImage->ImageSlices[i] = map;
+            /* A swrast-using driver has to return the same rowstride for
+             * every slice of the same texture, since we don't track them
+             * separately.
+             */
+            if (i == 0)
+               swImage->RowStride = rowStride;
+            else
+               assert(swImage->RowStride == rowStride);
+         }
+      }
+   }
+}
+
+
+void
+_swrast_unmap_texture(struct gl_context *ctx, struct gl_texture_object *texObj)
+{
+   const GLuint faces = _mesa_num_tex_faces(texObj->Target);
+   GLuint face, level;
+
+   for (face = 0; face < faces; face++) {
+      for (level = texObj->BaseLevel; level < MAX_TEXTURE_LEVELS; level++) {
+         struct gl_texture_image *texImage = texObj->Image[face][level];
+         struct swrast_texture_image *swImage = swrast_texture_image(texImage);
+         unsigned int i;
+
+         if (!texImage)
+            continue;
+
+         if (swImage->Buffer)
+            return;
+
+         for (i = 0; i < texture_slices(texImage); i++) {
+            if (swImage->ImageSlices[i]) {
+               ctx->Driver.UnmapTextureImage(ctx, texImage, i);
+               swImage->ImageSlices[i] = NULL;
+            }
+         }
+      }
+   }
+}
+
+
+/**
+ * Map all textures for reading prior to software rendering.
+ */
+void
+_swrast_map_textures(struct gl_context *ctx)
+{
+   GLbitfield enabledUnits = ctx->Texture._EnabledUnits;
+
+   /* loop over enabled texture units */
+   while (enabledUnits) {
+      GLuint unit = ffs(enabledUnits) - 1;
+      struct gl_texture_object *texObj = ctx->Texture.Unit[unit]._Current;
+      
+      _swrast_map_texture(ctx, texObj);
+
+      enabledUnits &= ~(1 << unit);
+   }
+}
+
+
+/**
+ * Unmap all textures for reading prior to software rendering.
+ */
+void
+_swrast_unmap_textures(struct gl_context *ctx)
+{
+   GLbitfield enabledUnits = ctx->Texture._EnabledUnits;
+
+   /* loop over enabled texture units */
+   while (enabledUnits) {
+      GLuint unit = ffs(enabledUnits) - 1;
+      struct gl_texture_object *texObj = ctx->Texture.Unit[unit]._Current;
+      
+      _swrast_unmap_texture(ctx, texObj);
+
+      enabledUnits &= ~(1 << unit);
+   }
+}