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/*
* Mesa 3-D graphics library
* Version: 5.1
*
* Copyright (C) 1999-2003 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
* BRIAN PAUL 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.
*
* Authors:
* Keith Whitwell <keith@tungstengraphics.com>
*/
#include "glheader.h"
#include "context.h"
#include "enums.h"
#include "state.h"
#include "macros.h"
#include "vbo_context.h"
static void vbo_exec_debug_verts( struct vbo_exec_context *exec )
{
GLuint count = exec->vtx.vert_count;
GLuint i;
_mesa_printf("%s: %u vertices %d primitives, %d vertsize\n",
__FUNCTION__,
count,
exec->vtx.prim_count,
exec->vtx.vertex_size);
for (i = 0 ; i < exec->vtx.prim_count ; i++) {
struct _mesa_prim *prim = &exec->vtx.prim[i];
_mesa_printf(" prim %d: %s%s %d..%d %s %s\n",
i,
_mesa_lookup_enum_by_nr(prim->mode),
prim->weak ? " (weak)" : "",
prim->start,
prim->start + prim->count,
prim->begin ? "BEGIN" : "(wrap)",
prim->end ? "END" : "(wrap)");
}
}
/*
* NOTE: Need to have calculated primitives by this point -- do it on the fly.
* NOTE: Old 'parity' issue is gone.
*/
static GLuint vbo_copy_vertices( struct vbo_exec_context *exec )
{
GLuint nr = exec->vtx.prim[exec->vtx.prim_count-1].count;
GLuint ovf, i;
GLuint sz = exec->vtx.vertex_size;
GLfloat *dst = exec->vtx.copied.buffer;
GLfloat *src = ((GLfloat *)exec->vtx.buffer_map +
exec->vtx.prim[exec->vtx.prim_count-1].start *
exec->vtx.vertex_size);
switch( exec->ctx->Driver.CurrentExecPrimitive )
{
case GL_POINTS:
return 0;
case GL_LINES:
ovf = nr&1;
for (i = 0 ; i < ovf ; i++)
_mesa_memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
return i;
case GL_TRIANGLES:
ovf = nr%3;
for (i = 0 ; i < ovf ; i++)
_mesa_memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
return i;
case GL_QUADS:
ovf = nr&3;
for (i = 0 ; i < ovf ; i++)
_mesa_memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
return i;
case GL_LINE_STRIP:
if (nr == 0)
return 0;
else {
_mesa_memcpy( dst, src+(nr-1)*sz, sz * sizeof(GLfloat) );
return 1;
}
case GL_LINE_LOOP:
case GL_TRIANGLE_FAN:
case GL_POLYGON:
if (nr == 0)
return 0;
else if (nr == 1) {
_mesa_memcpy( dst, src+0, sz * sizeof(GLfloat) );
return 1;
} else {
_mesa_memcpy( dst, src+0, sz * sizeof(GLfloat) );
_mesa_memcpy( dst+sz, src+(nr-1)*sz, sz * sizeof(GLfloat) );
return 2;
}
case GL_TRIANGLE_STRIP:
/* no parity issue, but need to make sure the tri is not drawn twice */
if (nr & 1) {
exec->vtx.prim[exec->vtx.prim_count-1].count--;
}
/* fallthrough */
case GL_QUAD_STRIP:
switch (nr) {
case 0: ovf = 0; break;
case 1: ovf = 1; break;
default: ovf = 2 + (nr&1); break;
}
for (i = 0 ; i < ovf ; i++)
_mesa_memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
return i;
case GL_POLYGON+1:
return 0;
default:
assert(0);
return 0;
}
}
/* TODO: populate these as the vertex is defined:
*/
static void vbo_exec_bind_arrays( GLcontext *ctx )
{
struct vbo_context *vbo = vbo_context(ctx);
struct vbo_exec_context *exec = &vbo->exec;
struct gl_client_array *arrays = exec->vtx.arrays;
GLuint count = exec->vtx.vert_count;
GLubyte *data = exec->vtx.buffer_map;
const GLuint *map;
GLuint attr;
/* Install the default (ie Current) attributes first, then overlay
* all active ones.
*/
switch (get_program_mode(exec->ctx)) {
case VP_NONE:
memcpy(arrays, vbo->legacy_currval, 16 * sizeof(arrays[0]));
memcpy(arrays + 16, vbo->mat_currval, MAT_ATTRIB_MAX * sizeof(arrays[0]));
map = vbo->map_vp_none;
break;
case VP_NV:
case VP_ARB:
/* The aliasing of attributes for NV vertex programs has already
* occurred. NV vertex programs cannot access material values,
* nor attributes greater than VERT_ATTRIB_TEX7.
*/
memcpy(arrays, vbo->legacy_currval, 16 * sizeof(arrays[0]));
memcpy(arrays + 16, vbo->generic_currval, 16 * sizeof(arrays[0]));
map = vbo->map_vp_arb;
break;
}
/* Make all active attributes (including edgeflag) available as
* arrays of floats.
*/
for (attr = 0; attr < VERT_ATTRIB_MAX ; attr++) {
GLuint src = map[attr];
if (exec->vtx.attrsz[src]) {
arrays[attr].Ptr = (void *)data;
arrays[attr].Size = exec->vtx.attrsz[src];
arrays[attr].StrideB = exec->vtx.vertex_size * sizeof(GLfloat);
arrays[attr].Stride = exec->vtx.vertex_size * sizeof(GLfloat);
arrays[attr].Type = GL_FLOAT;
arrays[attr].Enabled = 1;
arrays[attr].BufferObj = exec->vtx.bufferobj; /* NullBufferObj */
arrays[attr]._MaxElement = count; /* ??? */
data += exec->vtx.attrsz[attr] * sizeof(GLfloat);
}
}
}
/**
* Execute the buffer and save copied verts.
*/
void vbo_exec_vtx_flush( struct vbo_exec_context *exec )
{
if (0)
vbo_exec_debug_verts( exec );
if (exec->vtx.prim_count &&
exec->vtx.vert_count) {
exec->vtx.copied.nr = vbo_copy_vertices( exec );
if (exec->vtx.copied.nr != exec->vtx.vert_count) {
GLcontext *ctx = exec->ctx;
vbo_exec_bind_arrays( ctx );
vbo_context(ctx)->draw_prims( ctx,
exec->vtx.inputs,
exec->vtx.prim,
exec->vtx.prim_count,
NULL,
0,
exec->vtx.vert_count - 1);
}
}
exec->vtx.prim_count = 0;
exec->vtx.vert_count = 0;
exec->vtx.vbptr = (GLfloat *)exec->vtx.buffer_map;
}
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