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reactos/dll/opengl/mesa/vbo/vbo_exec_draw.c

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/*
* Mesa 3-D graphics library
* Version: 7.2
*
* Copyright (C) 1999-2008 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 <precomp.h>
#if FEATURE_beginend
static void
vbo_exec_debug_verts( struct vbo_exec_context *exec )
{
GLuint count = exec->vtx.vert_count;
GLuint i;
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];
printf(" prim %d: %s%s %d..%d %s %s\n",
i,
_mesa_lookup_prim_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;
const GLfloat *src = (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++)
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++)
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++)
memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
return i;
case GL_LINE_STRIP:
if (nr == 0) {
return 0;
}
else {
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) {
memcpy( dst, src+0, sz * sizeof(GLfloat) );
return 1;
}
else {
memcpy( dst, src+0, sz * sizeof(GLfloat) );
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++)
memcpy( dst+i*sz, src+(nr-ovf+i)*sz, sz * sizeof(GLfloat) );
return i;
case PRIM_OUTSIDE_BEGIN_END:
return 0;
default:
assert(0);
return 0;
}
}
/* TODO: populate these as the vertex is defined:
*/
static void
vbo_exec_bind_arrays( struct gl_context *ctx )
{
struct vbo_context *vbo = vbo_context(ctx);
struct vbo_exec_context *exec = &vbo->exec;
struct gl_client_array *arrays = exec->vtx.arrays;
const GLuint count = exec->vtx.vert_count;
GLuint attr;
GLbitfield64 varying_inputs = 0x0;
/* Install the default (ie Current) attributes first, then overlay
* all active ones.
*/
for (attr = 0; attr < VBO_ATTRIB_MAX; attr++) {
exec->vtx.inputs[attr] = &vbo->legacy_currval[attr];
}
/* Make all active attributes (including edgeflag) available as
* arrays of floats.
*/
for (attr = 0; attr < VBO_ATTRIB_MAX ; attr++) {
if (exec->vtx.attrsz[attr]) {
GLsizeiptr offset = (GLbyte *)exec->vtx.attrptr[attr] -
(GLbyte *)exec->vtx.vertex;
/* override the default array set above */
ASSERT(attr < Elements(exec->vtx.inputs));
ASSERT(attr < Elements(exec->vtx.arrays)); /* arrays[] */
exec->vtx.inputs[attr] = &arrays[attr];
if (_mesa_is_bufferobj(exec->vtx.bufferobj)) {
/* a real buffer obj: Ptr is an offset, not a pointer*/
assert(exec->vtx.bufferobj->Pointer); /* buf should be mapped */
assert(offset >= 0);
arrays[attr].Ptr = (GLubyte *)exec->vtx.bufferobj->Offset + offset;
}
else {
/* Ptr into ordinary app memory */
arrays[attr].Ptr = (GLubyte *)exec->vtx.buffer_map + offset;
}
arrays[attr].Size = exec->vtx.attrsz[attr];
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]._ElementSize = arrays[attr].Size * sizeof(GLfloat);
_mesa_reference_buffer_object(ctx,
&arrays[attr].BufferObj,
exec->vtx.bufferobj);
arrays[attr]._MaxElement = count; /* ??? */
varying_inputs |= VERT_BIT(attr);
ctx->NewState |= _NEW_ARRAY;
}
}
}
/**
* Unmap the VBO. This is called before drawing.
*/
static void
vbo_exec_vtx_unmap( struct vbo_exec_context *exec )
{
if (_mesa_is_bufferobj(exec->vtx.bufferobj)) {
struct gl_context *ctx = exec->ctx;
if (ctx->Driver.FlushMappedBufferRange) {
GLintptr offset = exec->vtx.buffer_used - exec->vtx.bufferobj->Offset;
GLsizeiptr length = (exec->vtx.buffer_ptr - exec->vtx.buffer_map) * sizeof(float);
if (length)
ctx->Driver.FlushMappedBufferRange(ctx, offset, length,
exec->vtx.bufferobj);
}
exec->vtx.buffer_used += (exec->vtx.buffer_ptr -
exec->vtx.buffer_map) * sizeof(float);
assert(exec->vtx.buffer_used <= VBO_VERT_BUFFER_SIZE);
assert(exec->vtx.buffer_ptr != NULL);
ctx->Driver.UnmapBuffer(ctx, exec->vtx.bufferobj);
exec->vtx.buffer_map = NULL;
exec->vtx.buffer_ptr = NULL;
exec->vtx.max_vert = 0;
}
}
/**
* Map the vertex buffer to begin storing glVertex, glColor, etc data.
*/
void
vbo_exec_vtx_map( struct vbo_exec_context *exec )
{
struct gl_context *ctx = exec->ctx;
const GLenum accessRange = GL_MAP_WRITE_BIT | /* for MapBufferRange */
GL_MAP_INVALIDATE_RANGE_BIT |
GL_MAP_UNSYNCHRONIZED_BIT |
GL_MAP_FLUSH_EXPLICIT_BIT |
MESA_MAP_NOWAIT_BIT;
const GLenum usage = GL_STREAM_DRAW_ARB;
if (!_mesa_is_bufferobj(exec->vtx.bufferobj))
return;
assert(!exec->vtx.buffer_map);
assert(!exec->vtx.buffer_ptr);
if (VBO_VERT_BUFFER_SIZE > exec->vtx.buffer_used + 1024) {
/* The VBO exists and there's room for more */
if (exec->vtx.bufferobj->Size > 0) {
exec->vtx.buffer_map =
(GLfloat *)ctx->Driver.MapBufferRange(ctx,
exec->vtx.buffer_used,
(VBO_VERT_BUFFER_SIZE -
exec->vtx.buffer_used),
accessRange,
exec->vtx.bufferobj);
exec->vtx.buffer_ptr = exec->vtx.buffer_map;
}
else {
exec->vtx.buffer_ptr = exec->vtx.buffer_map = NULL;
}
}
if (!exec->vtx.buffer_map) {
/* Need to allocate a new VBO */
exec->vtx.buffer_used = 0;
if (ctx->Driver.BufferData(ctx, GL_ARRAY_BUFFER_ARB,
VBO_VERT_BUFFER_SIZE,
NULL, usage, exec->vtx.bufferobj)) {
/* buffer allocation worked, now map the buffer */
exec->vtx.buffer_map =
(GLfloat *)ctx->Driver.MapBufferRange(ctx,
0, VBO_VERT_BUFFER_SIZE,
accessRange,
exec->vtx.bufferobj);
}
else {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "VBO allocation");
exec->vtx.buffer_map = NULL;
}
}
exec->vtx.buffer_ptr = exec->vtx.buffer_map;
if (!exec->vtx.buffer_map) {
/* out of memory */
_mesa_install_exec_vtxfmt( ctx, &exec->vtxfmt_noop );
}
else {
if (_mesa_using_noop_vtxfmt(ctx->Exec)) {
/* The no-op functions are installed so switch back to regular
* functions. We do this test just to avoid frequent and needless
* calls to _mesa_install_exec_vtxfmt().
*/
_mesa_install_exec_vtxfmt(ctx, &exec->vtxfmt);
}
}
if (0)
printf("map %d..\n", exec->vtx.buffer_used);
}
/**
* Execute the buffer and save copied verts.
* \param keep_unmapped if true, leave the VBO unmapped when we're done.
*/
void
vbo_exec_vtx_flush(struct vbo_exec_context *exec, GLboolean keepUnmapped)
{
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) {
struct gl_context *ctx = exec->ctx;
vbo_exec_bind_arrays( ctx );
if (ctx->NewState)
_mesa_update_state( ctx );
if (_mesa_is_bufferobj(exec->vtx.bufferobj)) {
vbo_exec_vtx_unmap( exec );
}
if (0)
printf("%s %d %d\n", __FUNCTION__, exec->vtx.prim_count,
exec->vtx.vert_count);
vbo_context(ctx)->draw_prims( ctx,
exec->vtx.inputs,
exec->vtx.prim,
exec->vtx.prim_count,
NULL,
GL_TRUE,
0,
exec->vtx.vert_count - 1);
/* If using a real VBO, get new storage -- unless asked not to.
*/
if (_mesa_is_bufferobj(exec->vtx.bufferobj) && !keepUnmapped) {
vbo_exec_vtx_map( exec );
}
}
}
/* May have to unmap explicitly if we didn't draw:
*/
if (keepUnmapped &&
_mesa_is_bufferobj(exec->vtx.bufferobj) &&
exec->vtx.buffer_map) {
vbo_exec_vtx_unmap( exec );
}
if (keepUnmapped || exec->vtx.vertex_size == 0)
exec->vtx.max_vert = 0;
else
exec->vtx.max_vert = ((VBO_VERT_BUFFER_SIZE - exec->vtx.buffer_used) /
(exec->vtx.vertex_size * sizeof(GLfloat)));
exec->vtx.buffer_ptr = exec->vtx.buffer_map;
exec->vtx.prim_count = 0;
exec->vtx.vert_count = 0;
}
#endif /* FEATURE_beginend */
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