First attempt at adding dynamic rotation (just RandR 1.1 for now)

1 files changed, 155 insertions, 0 deletions

diff --git a/src/amd_gx_rotate.c b/src/amd_gx_rotate.c
new file mode 100644
index 0000000..c9b813a
--- /dev/null
+++ b/src/amd_gx_rotate.c
@@ -0,0 +1,155 @@
+/* Copyrightg (c) 2006 Advanced Micro Devices, 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.
+ *
+ * Neither the name of the Advanced Micro Devices, Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from this
+ * software without specific prior written permission.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "xf86.h"
+#include "shadow.h"
+#include "amd.h"
+
+void *
+GXWindowLinear(ScreenPtr pScreen, CARD32 row, CARD32 offset, int mode, CARD32 *size, void *closure)
+{
+  ScrnInfoPtr pScrni = xf86Screens[pScreen->myNum];
+  GeodeRec *pGeode = GEODEPTR(pScrni);
+
+  *size = pGeode->displayPitch;
+
+  return (pGeode->FBBase + pGeode->displayOffset) +
+    row * pGeode->displayPitch + offset;
+}
+
+static
+void GXGetUpdateFunc(ScrnInfoPtr pScrni, int rotate, ShadowUpdateProc *update)
+{
+  *update = NULL;
+
+  switch(rotate) {
+  case RR_Rotate_90:
+
+    if (pScrni->bitsPerPixel == 8)
+      *update = shadowUpdateRotate8_90;
+    else if (pScrni->bitsPerPixel == 16)
+      *update = shadowUpdateRotate16_90;
+    else
+      *update = shadowUpdateRotate32_90;
+
+    break;
+
+  case RR_Rotate_180:
+
+    if (pScrni->bitsPerPixel == 8)
+      *update = shadowUpdateRotate8_180;
+    else if (pScrni->bitsPerPixel == 16)
+      *update = shadowUpdateRotate16_180;
+    else
+      *update = shadowUpdateRotate32_180;
+
+    break;
+
+  case RR_Rotate_270:
+    if (pScrni->bitsPerPixel == 8)
+      *update = shadowUpdateRotate8_270;
+    else if (pScrni->bitsPerPixel == 16)
+      *update = shadowUpdateRotate16_270;
+    else
+      *update = shadowUpdateRotate32_270;
+
+    break;
+  }
+}
+
+Bool
+GXRotate(ScrnInfoPtr pScrni, DisplayModePtr mode)
+{
+  GeodeRec *pGeode = GEODEPTR(pScrni);
+  ShadowUpdateProc update;
+  Rotation curr = pGeode->rotation;
+  unsigned int pitch, dw;
+  PixmapPtr pPixmap;
+  BOOL ret;
+
+  pPixmap = pScrni->pScreen->GetScreenPixmap(pScrni->pScreen);
+  pGeode->rotation = GXGetRotation(pScrni->pScreen);
+
+  /* Leave if we have nothing to do */
+
+  if (pGeode->rotation == curr && pGeode->curMode == mode) {
+    return TRUE;
+  }
+
+  shadowRemove(pScrni->pScreen, NULL);
+
+  switch(pGeode->rotation) {
+  case RR_Rotate_0:
+    ErrorF("Rotate to 0 degrees\n");
+    pScrni->displayWidth = pGeode->displayWidth;
+    pGeode->Pitch = pGeode->displayPitch;
+    break;
+
+   case RR_Rotate_90:
+     ErrorF("Rotate to 90 degrees\n");
+     pScrni->displayWidth = pScrni->pScreen->width;
+     break;
+
+  case RR_Rotate_180:
+    ErrorF("Rotate to 180 degrees\n");
+    pScrni->displayWidth = pGeode->displayWidth;
+    break;
+
+  case RR_Rotate_270:
+    ErrorF("Rotate to 270 degrees\n");
+    pScrni->displayWidth = pScrni->pScreen->width;
+    break;
+  }
+
+  if (pGeode->rotation != RR_Rotate_0) {
+
+    GXGetUpdateFunc(pScrni, pGeode->rotation, &update);
+    ret = shadowAdd(pScrni->pScreen, pPixmap, update, GXWindowLinear, pGeode->rotation, NULL);
+
+    /* XXX - FIXME - bail gracefully */
+
+    if (!ret)
+      ErrorF("shadowAdd failed\n");
+  }
+
+  if (pGeode->rotation == RR_Rotate_0)
+    pScrni->fbOffset = pGeode->displayOffset;
+  else
+    pScrni->fbOffset = pGeode->shadowOffset;
+
+  pScrni->pScreen->ModifyPixmapHeader(pPixmap,
+				      pScrni->pScreen->width,
+				      pScrni->pScreen->height,
+				      pScrni->pScreen->rootDepth,
+				      pScrni->bitsPerPixel,
+				      PixmapBytePad(pScrni->displayWidth, pScrni->pScreen->rootDepth),
+				      (pointer)(pGeode->FBBase + pScrni->fbOffset));
+
+  return TRUE;
+}