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fuchsia / third_party / mesa / 2a04203a9075428e1accbc3a06f87d9ba00b8d0c / . / src / mesa / vbo / vbo_exec_array.c
blob: 51c000e7bd99889499642d9125b8c188f078b3e3 [file] [log] [blame]
/**************************************************************************
*
* Copyright 2003 VMware, Inc.
* Copyright 2009 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, sub license, 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 (including the
* next paragraph) 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 NON-INFRINGEMENT.
* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS 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.
*
**************************************************************************/
#include <stdio.h>
#include "main/arrayobj.h"
#include "main/glheader.h"
#include "main/context.h"
#include "main/state.h"
#include "main/draw_validate.h"
#include "main/dispatch.h"
#include "main/varray.h"
#include "main/bufferobj.h"
#include "main/enums.h"
#include "main/macros.h"
#include "main/transformfeedback.h"
typedef struct {
GLuint count;
GLuint primCount;
GLuint first;
GLuint baseInstance;
} DrawArraysIndirectCommand;
typedef struct {
GLuint count;
GLuint primCount;
GLuint firstIndex;
GLint baseVertex;
GLuint baseInstance;
} DrawElementsIndirectCommand;
/**
* Check that element 'j' of the array has reasonable data.
* Map VBO if needed.
* For debugging purposes; not normally used.
*/
static void
check_array_data(struct gl_context *ctx, struct gl_vertex_array_object *vao,
GLuint attrib, GLuint j)
{
const struct gl_array_attributes *array = &vao->VertexAttrib[attrib];
if (array->Enabled) {
const struct gl_vertex_buffer_binding *binding =
&vao->BufferBinding[array->BufferBindingIndex];
struct gl_buffer_object *bo = binding->BufferObj;
const void *data = array->Ptr;
if (_mesa_is_bufferobj(bo)) {
if (!bo->Mappings[MAP_INTERNAL].Pointer) {
/* need to map now */
bo->Mappings[MAP_INTERNAL].Pointer =
ctx->Driver.MapBufferRange(ctx, 0, bo->Size,
GL_MAP_READ_BIT, bo, MAP_INTERNAL);
}
data = ADD_POINTERS(_mesa_vertex_attrib_address(array, binding),
bo->Mappings[MAP_INTERNAL].Pointer);
}
switch (array->Type) {
case GL_FLOAT:
{
GLfloat *f = (GLfloat *) ((GLubyte *) data + binding->Stride * j);
GLint k;
for (k = 0; k < array->Size; k++) {
if (IS_INF_OR_NAN(f[k]) || f[k] >= 1.0e20F || f[k] <= -1.0e10F) {
printf("Bad array data:\n");
printf(" Element[%u].%u = %f\n", j, k, f[k]);
printf(" Array %u at %p\n", attrib, (void *) array);
printf(" Type 0x%x, Size %d, Stride %d\n",
array->Type, array->Size, binding->Stride);
printf(" Address/offset %p in Buffer Object %u\n",
array->Ptr, bo->Name);
f[k] = 1.0F; /* XXX replace the bad value! */
}
/*assert(!IS_INF_OR_NAN(f[k])); */
}
}
break;
default:
;
}
}
}
/**
* Unmap the buffer object referenced by given array, if mapped.
*/
static void
unmap_array_buffer(struct gl_context *ctx, struct gl_vertex_array_object *vao,
GLuint attrib)
{
const struct gl_array_attributes *array = &vao->VertexAttrib[attrib];
if (array->Enabled) {
const struct gl_vertex_buffer_binding *binding =
&vao->BufferBinding[array->BufferBindingIndex];
struct gl_buffer_object *bo = binding->BufferObj;
if (_mesa_is_bufferobj(bo) && _mesa_bufferobj_mapped(bo, MAP_INTERNAL)) {
ctx->Driver.UnmapBuffer(ctx, bo, MAP_INTERNAL);
}
}
}
static inline int
sizeof_ib_type(GLenum type)
{
switch (type) {
case GL_UNSIGNED_INT:
return sizeof(GLuint);
case GL_UNSIGNED_SHORT:
return sizeof(GLushort);
case GL_UNSIGNED_BYTE:
return sizeof(GLubyte);
default:
assert(!"unsupported index data type");
/* In case assert is turned off */
return 0;
}
}
/**
* Examine the array's data for NaNs, etc.
* For debug purposes; not normally used.
*/
static void
check_draw_elements_data(struct gl_context *ctx, GLsizei count,
GLenum elemType, const void *elements,
GLint basevertex)
{
struct gl_vertex_array_object *vao = ctx->Array.VAO;
const void *elemMap;
GLint i;
GLuint k;
if (_mesa_is_bufferobj(vao->IndexBufferObj)) {
elemMap = ctx->Driver.MapBufferRange(ctx, 0,
vao->IndexBufferObj->Size,
GL_MAP_READ_BIT,
vao->IndexBufferObj, MAP_INTERNAL);
elements = ADD_POINTERS(elements, elemMap);
}
for (i = 0; i < count; i++) {
GLuint j;
/* j = element[i] */
switch (elemType) {
case GL_UNSIGNED_BYTE:
j = ((const GLubyte *) elements)[i];
break;
case GL_UNSIGNED_SHORT:
j = ((const GLushort *) elements)[i];
break;
case GL_UNSIGNED_INT:
j = ((const GLuint *) elements)[i];
break;
default:
unreachable("Unexpected index buffer type");
}
/* check element j of each enabled array */
for (k = 0; k < VERT_ATTRIB_MAX; k++) {
check_array_data(ctx, vao, k, j);
}
}
if (_mesa_is_bufferobj(vao->IndexBufferObj)) {
ctx->Driver.UnmapBuffer(ctx, vao->IndexBufferObj, MAP_INTERNAL);
}
for (k = 0; k < VERT_ATTRIB_MAX; k++) {
unmap_array_buffer(ctx, vao, k);
}
}
/**
* Check array data, looking for NaNs, etc.
*/
static void
check_draw_arrays_data(struct gl_context *ctx, GLint start, GLsizei count)
{
/* TO DO */
}
/**
* Check if we should skip the draw call even after validation was successful.
*/
static bool
skip_validated_draw(struct gl_context *ctx)
{
switch (ctx->API) {
case API_OPENGLES2:
/* For ES2, we can draw if we have a vertex program/shader). */
return ctx->VertexProgram._Current == NULL;
case API_OPENGLES:
/* For OpenGL ES, only draw if we have vertex positions
*/
if (!ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_POS].Enabled)
return true;
break;
case API_OPENGL_CORE:
/* Section 7.3 (Program Objects) of the OpenGL 4.5 Core Profile spec
* says:
*
* "If there is no active program for the vertex or fragment shader
* stages, the results of vertex and/or fragment processing will be
* undefined. However, this is not an error."
*
* The fragment shader is not tested here because other state (e.g.,
* GL_RASTERIZER_DISCARD) affects whether or not we actually care.
*/
return ctx->VertexProgram._Current == NULL;
case API_OPENGL_COMPAT:
if (ctx->VertexProgram._Current != NULL) {
/* Draw regardless of whether or not we have any vertex arrays.
* (Ex: could draw a point using a constant vertex pos)
*/
return false;
} else {
/* Draw if we have vertex positions (GL_VERTEX_ARRAY or generic
* array [0]).
*/
return (!ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_POS].Enabled &&
!ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_GENERIC0].Enabled);
}
break;
default:
unreachable("Invalid API value in check_valid_to_render()");
}
return false;
}
/**
* Print info/data for glDrawArrays(), for debugging.
*/
static void
print_draw_arrays(struct gl_context *ctx,
GLenum mode, GLint start, GLsizei count)
{
const struct gl_vertex_array_object *vao = ctx->Array.VAO;
printf("vbo_exec_DrawArrays(mode 0x%x, start %d, count %d):\n",
mode, start, count);
unsigned i;
for (i = 0; i < VERT_ATTRIB_MAX; ++i) {
const struct gl_array_attributes *array = &vao->VertexAttrib[i];
if (!array->Enabled)
continue;
const struct gl_vertex_buffer_binding *binding =
&vao->BufferBinding[array->BufferBindingIndex];
struct gl_buffer_object *bufObj = binding->BufferObj;
printf("attr %s: size %d stride %d enabled %d "
"ptr %p Bufobj %u\n",
gl_vert_attrib_name((gl_vert_attrib) i),
array->Size, binding->Stride, array->Enabled,
array->Ptr, bufObj->Name);
if (_mesa_is_bufferobj(bufObj)) {
GLubyte *p = ctx->Driver.MapBufferRange(ctx, 0, bufObj->Size,
GL_MAP_READ_BIT, bufObj,
MAP_INTERNAL);
int offset = (int) (GLintptr)
_mesa_vertex_attrib_address(array, binding);
unsigned multiplier;
switch (array->Type) {
case GL_DOUBLE:
case GL_INT64_ARB:
case GL_UNSIGNED_INT64_ARB:
multiplier = 2;
break;
default:
multiplier = 1;
}
float *f = (float *) (p + offset);
int *k = (int *) f;
int i = 0;
int n = (count - 1) * (binding->Stride / (4 * multiplier))
+ array->Size;
if (n > 32)
n = 32;
printf(" Data at offset %d:\n", offset);
do {
if (multiplier == 2)
printf(" double[%d] = 0x%016llx %lf\n", i,
((unsigned long long *) k)[i], ((double *) f)[i]);
else
printf(" float[%d] = 0x%08x %f\n", i, k[i], f[i]);
i++;
} while (i < n);
ctx->Driver.UnmapBuffer(ctx, bufObj, MAP_INTERNAL);
}
}
}
/**
* Return a filter mask for the net enabled vao arrays.
* This is to mask out arrays that would otherwise supersed required current
* values for the fixed function shaders for example.
*/
static GLbitfield
enabled_filter(const struct gl_context *ctx)
{
switch (ctx->VertexProgram._VPMode) {
case VP_MODE_FF:
/* When no vertex program is active (or the vertex program is generated
* from fixed-function state). We put the material values into the
* generic slots. Since the vao has no material arrays, mute these
* slots from the enabled arrays so that the current material values
* are pulled instead of the vao arrays.
*/
return VERT_BIT_FF_ALL;
case VP_MODE_SHADER:
/* There are no shaders in OpenGL ES 1.x, so this code path should be
* impossible to reach. The meta code is careful to not use shaders in
* ES1.
*/
assert(ctx->API != API_OPENGLES);
/* Other parts of the code assume that inputs[VERT_ATTRIB_POS] through
* inputs[VERT_ATTRIB_FF_MAX] will be non-NULL. However, in OpenGL
* ES 2.0+ or OpenGL core profile, none of these arrays should ever
* be enabled.
*/
if (ctx->API != API_OPENGL_COMPAT)
return VERT_BIT_GENERIC_ALL;
return VERT_BIT_ALL;
default:
assert(0);
return 0;
}
}
/**
* Helper function called by the other DrawArrays() functions below.
* This is where we handle primitive restart for drawing non-indexed
* arrays. If primitive restart is enabled, it typically means
* splitting one DrawArrays() into two.
*/
static void
vbo_draw_arrays(struct gl_context *ctx, GLenum mode, GLint start,
GLsizei count, GLuint numInstances, GLuint baseInstance,
GLuint drawID)
{
struct _mesa_prim prim;
if (skip_validated_draw(ctx))
return;
/* OpenGL 4.5 says that primitive restart is ignored with non-indexed
* draws.
*/
memset(&prim, 0, sizeof(prim));
prim.begin = 1;
prim.end = 1;
prim.mode = mode;
prim.num_instances = numInstances;
prim.base_instance = baseInstance;
prim.draw_id = drawID;
prim.is_indirect = 0;
prim.start = start;
prim.count = count;
ctx->Driver.Draw(ctx, &prim, 1, NULL,
GL_TRUE, start, start + count - 1, NULL, 0, NULL);
if (MESA_DEBUG_FLAGS & DEBUG_ALWAYS_FLUSH) {
_mesa_flush(ctx);
}
}
/**
* Execute a glRectf() function.
*/
static void GLAPIENTRY
vbo_exec_Rectf(GLfloat x1, GLfloat y1, GLfloat x2, GLfloat y2)
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END(ctx);
CALL_Begin(GET_DISPATCH(), (GL_QUADS));
CALL_Vertex2f(GET_DISPATCH(), (x1, y1));
CALL_Vertex2f(GET_DISPATCH(), (x2, y1));
CALL_Vertex2f(GET_DISPATCH(), (x2, y2));
CALL_Vertex2f(GET_DISPATCH(), (x1, y2));
CALL_End(GET_DISPATCH(), ());
}
static void GLAPIENTRY
vbo_exec_EvalMesh1(GLenum mode, GLint i1, GLint i2)
{
GET_CURRENT_CONTEXT(ctx);
GLint i;
GLfloat u, du;
GLenum prim;
switch (mode) {
case GL_POINT:
prim = GL_POINTS;
break;
case GL_LINE:
prim = GL_LINE_STRIP;
break;
default:
_mesa_error(ctx, GL_INVALID_ENUM, "glEvalMesh1(mode)");
return;
}
/* No effect if vertex maps disabled.
*/
if (!ctx->Eval.Map1Vertex4 && !ctx->Eval.Map1Vertex3)
return;
du = ctx->Eval.MapGrid1du;
u = ctx->Eval.MapGrid1u1 + i1 * du;
CALL_Begin(GET_DISPATCH(), (prim));
for (i = i1; i <= i2; i++, u += du) {
CALL_EvalCoord1f(GET_DISPATCH(), (u));
}
CALL_End(GET_DISPATCH(), ());
}
static void GLAPIENTRY
vbo_exec_EvalMesh2(GLenum mode, GLint i1, GLint i2, GLint j1, GLint j2)
{
GET_CURRENT_CONTEXT(ctx);
GLfloat u, du, v, dv, v1, u1;
GLint i, j;
switch (mode) {
case GL_POINT:
case GL_LINE:
case GL_FILL:
break;
default:
_mesa_error(ctx, GL_INVALID_ENUM, "glEvalMesh2(mode)");
return;
}
/* No effect if vertex maps disabled.
*/
if (!ctx->Eval.Map2Vertex4 && !ctx->Eval.Map2Vertex3)
return;
du = ctx->Eval.MapGrid2du;
dv = ctx->Eval.MapGrid2dv;
v1 = ctx->Eval.MapGrid2v1 + j1 * dv;
u1 = ctx->Eval.MapGrid2u1 + i1 * du;
switch (mode) {
case GL_POINT:
CALL_Begin(GET_DISPATCH(), (GL_POINTS));
for (v = v1, j = j1; j <= j2; j++, v += dv) {
for (u = u1, i = i1; i <= i2; i++, u += du) {
CALL_EvalCoord2f(GET_DISPATCH(), (u, v));
}
}
CALL_End(GET_DISPATCH(), ());
break;
case GL_LINE:
for (v = v1, j = j1; j <= j2; j++, v += dv) {
CALL_Begin(GET_DISPATCH(), (GL_LINE_STRIP));
for (u = u1, i = i1; i <= i2; i++, u += du) {
CALL_EvalCoord2f(GET_DISPATCH(), (u, v));
}
CALL_End(GET_DISPATCH(), ());
}
for (u = u1, i = i1; i <= i2; i++, u += du) {
CALL_Begin(GET_DISPATCH(), (GL_LINE_STRIP));
for (v = v1, j = j1; j <= j2; j++, v += dv) {
CALL_EvalCoord2f(GET_DISPATCH(), (u, v));
}
CALL_End(GET_DISPATCH(), ());
}
break;
case GL_FILL:
for (v = v1, j = j1; j < j2; j++, v += dv) {
CALL_Begin(GET_DISPATCH(), (GL_TRIANGLE_STRIP));
for (u = u1, i = i1; i <= i2; i++, u += du) {
CALL_EvalCoord2f(GET_DISPATCH(), (u, v));
CALL_EvalCoord2f(GET_DISPATCH(), (u, v + dv));
}
CALL_End(GET_DISPATCH(), ());
}
break;
}
}
/**
* Called from glDrawArrays when in immediate mode (not display list mode).
*/
static void GLAPIENTRY
vbo_exec_DrawArrays(GLenum mode, GLint start, GLsizei count)
{
GET_CURRENT_CONTEXT(ctx);
if (MESA_VERBOSE & VERBOSE_DRAW)
_mesa_debug(ctx, "glDrawArrays(%s, %d, %d)\n",
_mesa_enum_to_string(mode), start, count);
FLUSH_FOR_DRAW(ctx);
if (_mesa_is_no_error_enabled(ctx)) {
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (ctx->NewState)
_mesa_update_state(ctx);
} else {
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (!_mesa_validate_DrawArrays(ctx, mode, count))
return;
}
if (0)
check_draw_arrays_data(ctx, start, count);
vbo_draw_arrays(ctx, mode, start, count, 1, 0, 0);
if (0)
print_draw_arrays(ctx, mode, start, count);
}
/**
* Called from glDrawArraysInstanced when in immediate mode (not
* display list mode).
*/
static void GLAPIENTRY
vbo_exec_DrawArraysInstanced(GLenum mode, GLint start, GLsizei count,
GLsizei numInstances)
{
GET_CURRENT_CONTEXT(ctx);
if (MESA_VERBOSE & VERBOSE_DRAW)
_mesa_debug(ctx, "glDrawArraysInstanced(%s, %d, %d, %d)\n",
_mesa_enum_to_string(mode), start, count, numInstances);
FLUSH_FOR_DRAW(ctx);
if (_mesa_is_no_error_enabled(ctx)) {
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (ctx->NewState)
_mesa_update_state(ctx);
} else {
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (!_mesa_validate_DrawArraysInstanced(ctx, mode, start, count,
numInstances))
return;
}
if (0)
check_draw_arrays_data(ctx, start, count);
vbo_draw_arrays(ctx, mode, start, count, numInstances, 0, 0);
if (0)
print_draw_arrays(ctx, mode, start, count);
}
/**
* Called from glDrawArraysInstancedBaseInstance when in immediate mode.
*/
static void GLAPIENTRY
vbo_exec_DrawArraysInstancedBaseInstance(GLenum mode, GLint first,
GLsizei count, GLsizei numInstances,
GLuint baseInstance)
{
GET_CURRENT_CONTEXT(ctx);
if (MESA_VERBOSE & VERBOSE_DRAW)
_mesa_debug(ctx,
"glDrawArraysInstancedBaseInstance(%s, %d, %d, %d, %d)\n",
_mesa_enum_to_string(mode), first, count,
numInstances, baseInstance);
FLUSH_FOR_DRAW(ctx);
if (_mesa_is_no_error_enabled(ctx)) {
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (ctx->NewState)
_mesa_update_state(ctx);
} else {
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (!_mesa_validate_DrawArraysInstanced(ctx, mode, first, count,
numInstances))
return;
}
if (0)
check_draw_arrays_data(ctx, first, count);
vbo_draw_arrays(ctx, mode, first, count, numInstances, baseInstance, 0);
if (0)
print_draw_arrays(ctx, mode, first, count);
}
/**
* Called from glMultiDrawArrays when in immediate mode.
*/
static void GLAPIENTRY
vbo_exec_MultiDrawArrays(GLenum mode, const GLint *first,
const GLsizei *count, GLsizei primcount)
{
GET_CURRENT_CONTEXT(ctx);
GLint i;
if (MESA_VERBOSE & VERBOSE_DRAW)
_mesa_debug(ctx,
"glMultiDrawArrays(%s, %p, %p, %d)\n",
_mesa_enum_to_string(mode), first, count, primcount);
FLUSH_FOR_DRAW(ctx);
if (_mesa_is_no_error_enabled(ctx)) {
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (ctx->NewState)
_mesa_update_state(ctx);
} else {
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (!_mesa_validate_MultiDrawArrays(ctx, mode, count, primcount))
return;
}
for (i = 0; i < primcount; i++) {
if (count[i] > 0) {
if (0)
check_draw_arrays_data(ctx, first[i], count[i]);
/* The GL_ARB_shader_draw_parameters spec adds the following after the
* pseudo-code describing glMultiDrawArrays:
*
* "The index of the draw (<i> in the above pseudo-code) may be
* read by a vertex shader as <gl_DrawIDARB>, as described in
* Section 11.1.3.9."
*/
vbo_draw_arrays(ctx, mode, first[i], count[i], 1, 0, i);
if (0)
print_draw_arrays(ctx, mode, first[i], count[i]);
}
}
}
/**
* Map GL_ELEMENT_ARRAY_BUFFER and print contents.
* For debugging.
*/
#if 0
static void
dump_element_buffer(struct gl_context *ctx, GLenum type)
{
const GLvoid *map =
ctx->Driver.MapBufferRange(ctx, 0,
ctx->Array.VAO->IndexBufferObj->Size,
GL_MAP_READ_BIT,
ctx->Array.VAO->IndexBufferObj,
MAP_INTERNAL);
switch (type) {
case GL_UNSIGNED_BYTE:
{
const GLubyte *us = (const GLubyte *) map;
GLint i;
for (i = 0; i < ctx->Array.VAO->IndexBufferObj->Size; i++) {
printf("%02x ", us[i]);
if (i % 32 == 31)
printf("\n");
}
printf("\n");
}
break;
case GL_UNSIGNED_SHORT:
{
const GLushort *us = (const GLushort *) map;
GLint i;
for (i = 0; i < ctx->Array.VAO->IndexBufferObj->Size / 2; i++) {
printf("%04x ", us[i]);
if (i % 16 == 15)
printf("\n");
}
printf("\n");
}
break;
case GL_UNSIGNED_INT:
{
const GLuint *us = (const GLuint *) map;
GLint i;
for (i = 0; i < ctx->Array.VAO->IndexBufferObj->Size / 4; i++) {
printf("%08x ", us[i]);
if (i % 8 == 7)
printf("\n");
}
printf("\n");
}
break;
default:
;
}
ctx->Driver.UnmapBuffer(ctx, ctx->Array.VAO->IndexBufferObj, MAP_INTERNAL);
}
#endif
static bool
skip_draw_elements(struct gl_context *ctx, GLsizei count,
const GLvoid *indices)
{
if (count == 0)
return true;
/* Not using a VBO for indices, so avoid NULL pointer derefs later.
*/
if (!_mesa_is_bufferobj(ctx->Array.VAO->IndexBufferObj) && indices == NULL)
return true;
if (skip_validated_draw(ctx))
return true;
return false;
}
/**
* Inner support for both _mesa_DrawElements and _mesa_DrawRangeElements.
* Do the rendering for a glDrawElements or glDrawRangeElements call after
* we've validated buffer bounds, etc.
*/
static void
vbo_validated_drawrangeelements(struct gl_context *ctx, GLenum mode,
GLboolean index_bounds_valid,
GLuint start, GLuint end,
GLsizei count, GLenum type,
const GLvoid * indices,
GLint basevertex, GLuint numInstances,
GLuint baseInstance)
{
struct _mesa_index_buffer ib;
struct _mesa_prim prim;
if (!index_bounds_valid) {
assert(start == 0u);
assert(end == ~0u);
}
if (skip_draw_elements(ctx, count, indices))
return;
ib.count = count;
ib.index_size = sizeof_ib_type(type);
ib.obj = ctx->Array.VAO->IndexBufferObj;
ib.ptr = indices;
prim.begin = 1;
prim.end = 1;
prim.weak = 0;
prim.pad = 0;
prim.mode = mode;
prim.start = 0;
prim.count = count;
prim.indexed = 1;
prim.is_indirect = 0;
prim.basevertex = basevertex;
prim.num_instances = numInstances;
prim.base_instance = baseInstance;
prim.draw_id = 0;
/* Need to give special consideration to rendering a range of
* indices starting somewhere above zero. Typically the
* application is issuing multiple DrawRangeElements() to draw
* successive primitives layed out linearly in the vertex arrays.
* Unless the vertex arrays are all in a VBO (or locked as with
* CVA), the OpenGL semantics imply that we need to re-read or
* re-upload the vertex data on each draw call.
*
* In the case of hardware tnl, we want to avoid starting the
* upload at zero, as it will mean every draw call uploads an
* increasing amount of not-used vertex data. Worse - in the
* software tnl module, all those vertices might be transformed and
* lit but never rendered.
*
* If we just upload or transform the vertices in start..end,
* however, the indices will be incorrect.
*
* At this level, we don't know exactly what the requirements of
* the backend are going to be, though it will likely boil down to
* either:
*
* 1) Do nothing, everything is in a VBO and is processed once
* only.
*
* 2) Adjust the indices and vertex arrays so that start becomes
* zero.
*
* Rather than doing anything here, I'll provide a helper function
* for the latter case elsewhere.
*/
ctx->Driver.Draw(ctx, &prim, 1, &ib,
index_bounds_valid, start, end, NULL, 0, NULL);
if (MESA_DEBUG_FLAGS & DEBUG_ALWAYS_FLUSH) {
_mesa_flush(ctx);
}
}
/**
* Called by glDrawRangeElementsBaseVertex() in immediate mode.
*/
static void GLAPIENTRY
vbo_exec_DrawRangeElementsBaseVertex(GLenum mode, GLuint start, GLuint end,
GLsizei count, GLenum type,
const GLvoid * indices, GLint basevertex)
{
static GLuint warnCount = 0;
GLboolean index_bounds_valid = GL_TRUE;
/* This is only useful to catch invalid values in the "end" parameter
* like ~0.
*/
GLuint max_element = 2 * 1000 * 1000 * 1000; /* just a big number */
GET_CURRENT_CONTEXT(ctx);
if (MESA_VERBOSE & VERBOSE_DRAW)
_mesa_debug(ctx,
"glDrawRangeElementsBaseVertex(%s, %u, %u, %d, %s, %p, %d)\n",
_mesa_enum_to_string(mode), start, end, count,
_mesa_enum_to_string(type), indices, basevertex);
FLUSH_FOR_DRAW(ctx);
if (_mesa_is_no_error_enabled(ctx)) {
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (ctx->NewState)
_mesa_update_state(ctx);
} else {
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (!_mesa_validate_DrawRangeElements(ctx, mode, start, end, count,
type, indices))
return;
}
if ((int) end + basevertex < 0 || start + basevertex >= max_element) {
/* The application requested we draw using a range of indices that's
* outside the bounds of the current VBO. This is invalid and appears
* to give undefined results. The safest thing to do is to simply
* ignore the range, in case the application botched their range tracking
* but did provide valid indices. Also issue a warning indicating that
* the application is broken.
*/
if (warnCount++ < 10) {
_mesa_warning(ctx, "glDrawRangeElements(start %u, end %u, "
"basevertex %d, count %d, type 0x%x, indices=%p):\n"
"\trange is outside VBO bounds (max=%u); ignoring.\n"
"\tThis should be fixed in the application.",
start, end, basevertex, count, type, indices,
max_element - 1);
}
index_bounds_valid = GL_FALSE;
}
/* NOTE: It's important that 'end' is a reasonable value.
* in _tnl_draw_prims(), we use end to determine how many vertices
* to transform. If it's too large, we can unnecessarily split prims
* or we can read/write out of memory in several different places!
*/
/* Catch/fix some potential user errors */
if (type == GL_UNSIGNED_BYTE) {
start = MIN2(start, 0xff);
end = MIN2(end, 0xff);
}
else if (type == GL_UNSIGNED_SHORT) {
start = MIN2(start, 0xffff);
end = MIN2(end, 0xffff);
}
if (0) {
printf("glDraw[Range]Elements{,BaseVertex}"
"(start %u, end %u, type 0x%x, count %d) ElemBuf %u, "
"base %d\n",
start, end, type, count,
ctx->Array.VAO->IndexBufferObj->Name, basevertex);
}
if ((int) start + basevertex < 0 || end + basevertex >= max_element)
index_bounds_valid = GL_FALSE;
#if 0
check_draw_elements_data(ctx, count, type, indices, basevertex);
#else
(void) check_draw_elements_data;
#endif
if (!index_bounds_valid) {
start = 0;
end = ~0;
}
vbo_validated_drawrangeelements(ctx, mode, index_bounds_valid, start, end,
count, type, indices, basevertex, 1, 0);
}
/**
* Called by glDrawRangeElements() in immediate mode.
*/
static void GLAPIENTRY
vbo_exec_DrawRangeElements(GLenum mode, GLuint start, GLuint end,
GLsizei count, GLenum type, const GLvoid * indices)
{
if (MESA_VERBOSE & VERBOSE_DRAW) {
GET_CURRENT_CONTEXT(ctx);
_mesa_debug(ctx,
"glDrawRangeElements(%s, %u, %u, %d, %s, %p)\n",
_mesa_enum_to_string(mode), start, end, count,
_mesa_enum_to_string(type), indices);
}
vbo_exec_DrawRangeElementsBaseVertex(mode, start, end, count, type,
indices, 0);
}
/**
* Called by glDrawElements() in immediate mode.
*/
static void GLAPIENTRY
vbo_exec_DrawElements(GLenum mode, GLsizei count, GLenum type,
const GLvoid * indices)
{
GET_CURRENT_CONTEXT(ctx);
if (MESA_VERBOSE & VERBOSE_DRAW)
_mesa_debug(ctx, "glDrawElements(%s, %u, %s, %p)\n",
_mesa_enum_to_string(mode), count,
_mesa_enum_to_string(type), indices);
FLUSH_FOR_DRAW(ctx);
if (_mesa_is_no_error_enabled(ctx)) {
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (ctx->NewState)
_mesa_update_state(ctx);
} else {
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (!_mesa_validate_DrawElements(ctx, mode, count, type, indices))
return;
}
vbo_validated_drawrangeelements(ctx, mode, GL_FALSE, 0, ~0,
count, type, indices, 0, 1, 0);
}
/**
* Called by glDrawElementsBaseVertex() in immediate mode.
*/
static void GLAPIENTRY
vbo_exec_DrawElementsBaseVertex(GLenum mode, GLsizei count, GLenum type,
const GLvoid * indices, GLint basevertex)
{
GET_CURRENT_CONTEXT(ctx);
if (MESA_VERBOSE & VERBOSE_DRAW)
_mesa_debug(ctx, "glDrawElements(%s, %u, %s, %p)\n",
_mesa_enum_to_string(mode), count,
_mesa_enum_to_string(type), indices);
FLUSH_FOR_DRAW(ctx);
if (_mesa_is_no_error_enabled(ctx)) {
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (ctx->NewState)
_mesa_update_state(ctx);
} else {
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (!_mesa_validate_DrawElements(ctx, mode, count, type, indices))
return;
}
vbo_validated_drawrangeelements(ctx, mode, GL_FALSE, 0, ~0,
count, type, indices, basevertex, 1, 0);
}
/**
* Called by glDrawElementsInstanced() in immediate mode.
*/
static void GLAPIENTRY
vbo_exec_DrawElementsInstanced(GLenum mode, GLsizei count, GLenum type,
const GLvoid * indices, GLsizei numInstances)
{
GET_CURRENT_CONTEXT(ctx);
if (MESA_VERBOSE & VERBOSE_DRAW)
_mesa_debug(ctx, "glDrawElements(%s, %u, %s, %p)\n",
_mesa_enum_to_string(mode), count,
_mesa_enum_to_string(type), indices);
FLUSH_FOR_DRAW(ctx);
if (_mesa_is_no_error_enabled(ctx)) {
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (ctx->NewState)
_mesa_update_state(ctx);
} else {
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (!_mesa_validate_DrawElementsInstanced(ctx, mode, count, type,
indices, numInstances))
return;
}
vbo_validated_drawrangeelements(ctx, mode, GL_FALSE, 0, ~0,
count, type, indices, 0, numInstances, 0);
}
/**
* Called by glDrawElementsInstancedBaseVertex() in immediate mode.
*/
static void GLAPIENTRY
vbo_exec_DrawElementsInstancedBaseVertex(GLenum mode, GLsizei count,
GLenum type, const GLvoid * indices,
GLsizei numInstances,
GLint basevertex)
{
GET_CURRENT_CONTEXT(ctx);
if (MESA_VERBOSE & VERBOSE_DRAW)
_mesa_debug(ctx,
"glDrawElementsInstancedBaseVertex"
"(%s, %d, %s, %p, %d; %d)\n",
_mesa_enum_to_string(mode), count,
_mesa_enum_to_string(type), indices,
numInstances, basevertex);
FLUSH_FOR_DRAW(ctx);
if (_mesa_is_no_error_enabled(ctx)) {
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (ctx->NewState)
_mesa_update_state(ctx);
} else {
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (!_mesa_validate_DrawElementsInstanced(ctx, mode, count, type,
indices, numInstances))
return;
}
vbo_validated_drawrangeelements(ctx, mode, GL_FALSE, 0, ~0,
count, type, indices,
basevertex, numInstances, 0);
}
/**
* Called by glDrawElementsInstancedBaseInstance() in immediate mode.
*/
static void GLAPIENTRY
vbo_exec_DrawElementsInstancedBaseInstance(GLenum mode, GLsizei count,
GLenum type,
const GLvoid *indices,
GLsizei numInstances,
GLuint baseInstance)
{
GET_CURRENT_CONTEXT(ctx);
if (MESA_VERBOSE & VERBOSE_DRAW)
_mesa_debug(ctx,
"glDrawElementsInstancedBaseInstance"
"(%s, %d, %s, %p, %d, %d)\n",
_mesa_enum_to_string(mode), count,
_mesa_enum_to_string(type), indices,
numInstances, baseInstance);
FLUSH_FOR_DRAW(ctx);
if (_mesa_is_no_error_enabled(ctx)) {
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (ctx->NewState)
_mesa_update_state(ctx);
} else {
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (!_mesa_validate_DrawElementsInstanced(ctx, mode, count, type,
indices, numInstances))
return;
}
vbo_validated_drawrangeelements(ctx, mode, GL_FALSE, 0, ~0,
count, type, indices, 0, numInstances,
baseInstance);
}
/**
* Called by glDrawElementsInstancedBaseVertexBaseInstance() in immediate mode.
*/
static void GLAPIENTRY
vbo_exec_DrawElementsInstancedBaseVertexBaseInstance(GLenum mode,
GLsizei count,
GLenum type,
const GLvoid *indices,
GLsizei numInstances,
GLint basevertex,
GLuint baseInstance)
{
GET_CURRENT_CONTEXT(ctx);
if (MESA_VERBOSE & VERBOSE_DRAW)
_mesa_debug(ctx,
"glDrawElementsInstancedBaseVertexBaseInstance"
"(%s, %d, %s, %p, %d, %d, %d)\n",
_mesa_enum_to_string(mode), count,
_mesa_enum_to_string(type), indices,
numInstances, basevertex, baseInstance);
FLUSH_FOR_DRAW(ctx);
if (_mesa_is_no_error_enabled(ctx)) {
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (ctx->NewState)
_mesa_update_state(ctx);
} else {
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (!_mesa_validate_DrawElementsInstanced(ctx, mode, count, type,
indices, numInstances))
return;
}
vbo_validated_drawrangeelements(ctx, mode, GL_FALSE, 0, ~0,
count, type, indices, basevertex,
numInstances, baseInstance);
}
/**
* Inner support for both _mesa_MultiDrawElements() and
* _mesa_MultiDrawRangeElements().
* This does the actual rendering after we've checked array indexes, etc.
*/
static void
vbo_validated_multidrawelements(struct gl_context *ctx, GLenum mode,
const GLsizei *count, GLenum type,
const GLvoid * const *indices,
GLsizei primcount, const GLint *basevertex)
{
struct _mesa_index_buffer ib;
struct _mesa_prim *prim;
unsigned int index_type_size = sizeof_ib_type(type);
uintptr_t min_index_ptr, max_index_ptr;
GLboolean fallback = GL_FALSE;
int i;
if (primcount == 0)
return;
prim = calloc(primcount, sizeof(*prim));
if (prim == NULL) {
_mesa_error(ctx, GL_OUT_OF_MEMORY, "glMultiDrawElements");
return;
}
min_index_ptr = (uintptr_t) indices[0];
max_index_ptr = 0;
for (i = 0; i < primcount; i++) {
min_index_ptr = MIN2(min_index_ptr, (uintptr_t) indices[i]);
max_index_ptr = MAX2(max_index_ptr, (uintptr_t) indices[i] +
index_type_size * count[i]);
}
/* Check if we can handle this thing as a bunch of index offsets from the
* same index pointer. If we can't, then we have to fall back to doing
* a draw_prims per primitive.
* Check that the difference between each prim's indexes is a multiple of
* the index/element size.
*/
if (index_type_size != 1) {
for (i = 0; i < primcount; i++) {
if ((((uintptr_t) indices[i] - min_index_ptr) % index_type_size) !=
0) {
fallback = GL_TRUE;
break;
}
}
}
/* Draw primitives individually if one count is zero, so we can easily skip
* that primitive.
*/
for (i = 0; i < primcount; i++) {
if (count[i] == 0) {
fallback = GL_TRUE;
break;
}
}
/* If the index buffer isn't in a VBO, then treating the application's
* subranges of the index buffer as one large index buffer may lead to
* us reading unmapped memory.
*/
if (!_mesa_is_bufferobj(ctx->Array.VAO->IndexBufferObj))
fallback = GL_TRUE;
if (!fallback) {
ib.count = (max_index_ptr - min_index_ptr) / index_type_size;
ib.index_size = sizeof_ib_type(type);
ib.obj = ctx->Array.VAO->IndexBufferObj;
ib.ptr = (void *) min_index_ptr;
for (i = 0; i < primcount; i++) {
prim[i].begin = (i == 0);
prim[i].end = (i == primcount - 1);
prim[i].weak = 0;
prim[i].pad = 0;
prim[i].mode = mode;
prim[i].start =
((uintptr_t) indices[i] - min_index_ptr) / index_type_size;
prim[i].count = count[i];
prim[i].indexed = 1;
prim[i].num_instances = 1;
prim[i].base_instance = 0;
prim[i].draw_id = i;
prim[i].is_indirect = 0;
if (basevertex != NULL)
prim[i].basevertex = basevertex[i];
else
prim[i].basevertex = 0;
}
ctx->Driver.Draw(ctx, prim, primcount, &ib,
false, 0, ~0, NULL, 0, NULL);
}
else {
/* render one prim at a time */
for (i = 0; i < primcount; i++) {
if (count[i] == 0)
continue;
ib.count = count[i];
ib.index_size = sizeof_ib_type(type);
ib.obj = ctx->Array.VAO->IndexBufferObj;
ib.ptr = indices[i];
prim[0].begin = 1;
prim[0].end = 1;
prim[0].weak = 0;
prim[0].pad = 0;
prim[0].mode = mode;
prim[0].start = 0;
prim[0].count = count[i];
prim[0].indexed = 1;
prim[0].num_instances = 1;
prim[0].base_instance = 0;
prim[0].draw_id = i;
prim[0].is_indirect = 0;
if (basevertex != NULL)
prim[0].basevertex = basevertex[i];
else
prim[0].basevertex = 0;
ctx->Driver.Draw(ctx, prim, 1, &ib, false, 0, ~0, NULL, 0, NULL);
}
}
free(prim);
if (MESA_DEBUG_FLAGS & DEBUG_ALWAYS_FLUSH) {
_mesa_flush(ctx);
}
}
static void GLAPIENTRY
vbo_exec_MultiDrawElements(GLenum mode,
const GLsizei *count, GLenum type,
const GLvoid * const *indices, GLsizei primcount)
{
GET_CURRENT_CONTEXT(ctx);
FLUSH_FOR_DRAW(ctx);
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (!_mesa_validate_MultiDrawElements(ctx, mode, count, type, indices,
primcount))
return;
if (skip_validated_draw(ctx))
return;
vbo_validated_multidrawelements(ctx, mode, count, type, indices, primcount,
NULL);
}
static void GLAPIENTRY
vbo_exec_MultiDrawElementsBaseVertex(GLenum mode,
const GLsizei *count, GLenum type,
const GLvoid * const *indices,
GLsizei primcount,
const GLsizei *basevertex)
{
GET_CURRENT_CONTEXT(ctx);
FLUSH_FOR_DRAW(ctx);
if (_mesa_is_no_error_enabled(ctx)) {
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (ctx->NewState)
_mesa_update_state(ctx);
} else {
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (!_mesa_validate_MultiDrawElements(ctx, mode, count, type, indices,
primcount))
return;
}
if (skip_validated_draw(ctx))
return;
vbo_validated_multidrawelements(ctx, mode, count, type, indices, primcount,
basevertex);
}
/**
* Draw a GL primitive using a vertex count obtained from transform feedback.
* \param mode the type of GL primitive to draw
* \param obj the transform feedback object to use
* \param stream index of the transform feedback stream from which to
* get the primitive count.
* \param numInstances number of instances to draw
*/
static void
vbo_draw_transform_feedback(struct gl_context *ctx, GLenum mode,
struct gl_transform_feedback_object *obj,
GLuint stream, GLuint numInstances)
{
struct _mesa_prim prim;
FLUSH_FOR_DRAW(ctx);
if (_mesa_is_no_error_enabled(ctx)) {
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (ctx->NewState)
_mesa_update_state(ctx);
} else {
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (!_mesa_validate_DrawTransformFeedback(ctx, mode, obj, stream,
numInstances)) {
return;
}
}
if (ctx->Driver.GetTransformFeedbackVertexCount &&
(ctx->Const.AlwaysUseGetTransformFeedbackVertexCount ||
!_mesa_all_varyings_in_vbos(ctx->Array.VAO))) {
GLsizei n =
ctx->Driver.GetTransformFeedbackVertexCount(ctx, obj, stream);
vbo_draw_arrays(ctx, mode, 0, n, numInstances, 0, 0);
return;
}
if (skip_validated_draw(ctx))
return;
/* init most fields to zero */
memset(&prim, 0, sizeof(prim));
prim.begin = 1;
prim.end = 1;
prim.mode = mode;
prim.num_instances = numInstances;
prim.base_instance = 0;
prim.is_indirect = 0;
/* Maybe we should do some primitive splitting for primitive restart
* (like in DrawArrays), but we have no way to know how many vertices
* will be rendered. */
ctx->Driver.Draw(ctx, &prim, 1, NULL, GL_FALSE, 0, ~0, obj, stream, NULL);
if (MESA_DEBUG_FLAGS & DEBUG_ALWAYS_FLUSH) {
_mesa_flush(ctx);
}
}
/**
* Like DrawArrays, but take the count from a transform feedback object.
* \param mode GL_POINTS, GL_LINES, GL_TRIANGLE_STRIP, etc.
* \param name the transform feedback object
* User still has to setup of the vertex attribute info with
* glVertexPointer, glColorPointer, etc.
* Part of GL_ARB_transform_feedback2.
*/
static void GLAPIENTRY
vbo_exec_DrawTransformFeedback(GLenum mode, GLuint name)
{
GET_CURRENT_CONTEXT(ctx);
struct gl_transform_feedback_object *obj =
_mesa_lookup_transform_feedback_object(ctx, name);
if (MESA_VERBOSE & VERBOSE_DRAW)
_mesa_debug(ctx, "glDrawTransformFeedback(%s, %d)\n",
_mesa_enum_to_string(mode), name);
vbo_draw_transform_feedback(ctx, mode, obj, 0, 1);
}
static void GLAPIENTRY
vbo_exec_DrawTransformFeedbackStream(GLenum mode, GLuint name, GLuint stream)
{
GET_CURRENT_CONTEXT(ctx);
struct gl_transform_feedback_object *obj =
_mesa_lookup_transform_feedback_object(ctx, name);
if (MESA_VERBOSE & VERBOSE_DRAW)
_mesa_debug(ctx, "glDrawTransformFeedbackStream(%s, %u, %u)\n",
_mesa_enum_to_string(mode), name, stream);
vbo_draw_transform_feedback(ctx, mode, obj, stream, 1);
}
static void GLAPIENTRY
vbo_exec_DrawTransformFeedbackInstanced(GLenum mode, GLuint name,
GLsizei primcount)
{
GET_CURRENT_CONTEXT(ctx);
struct gl_transform_feedback_object *obj =
_mesa_lookup_transform_feedback_object(ctx, name);
if (MESA_VERBOSE & VERBOSE_DRAW)
_mesa_debug(ctx, "glDrawTransformFeedbackInstanced(%s, %d)\n",
_mesa_enum_to_string(mode), name);
vbo_draw_transform_feedback(ctx, mode, obj, 0, primcount);
}
static void GLAPIENTRY
vbo_exec_DrawTransformFeedbackStreamInstanced(GLenum mode, GLuint name,
GLuint stream,
GLsizei primcount)
{
GET_CURRENT_CONTEXT(ctx);
struct gl_transform_feedback_object *obj =
_mesa_lookup_transform_feedback_object(ctx, name);
if (MESA_VERBOSE & VERBOSE_DRAW)
_mesa_debug(ctx, "glDrawTransformFeedbackStreamInstanced"
"(%s, %u, %u, %i)\n",
_mesa_enum_to_string(mode), name, stream, primcount);
vbo_draw_transform_feedback(ctx, mode, obj, stream, primcount);
}
static void
vbo_validated_drawarraysindirect(struct gl_context *ctx,
GLenum mode, const GLvoid *indirect)
{
ctx->Driver.DrawIndirect(ctx, mode,
ctx->DrawIndirectBuffer, (GLsizeiptr) indirect,
1 /* draw_count */ , 16 /* stride */ ,
NULL, 0, NULL);
if (MESA_DEBUG_FLAGS & DEBUG_ALWAYS_FLUSH)
_mesa_flush(ctx);
}
static void
vbo_validated_multidrawarraysindirect(struct gl_context *ctx,
GLenum mode,
const GLvoid *indirect,
GLsizei primcount, GLsizei stride)
{
GLsizeiptr offset = (GLsizeiptr) indirect;
if (primcount == 0)
return;
ctx->Driver.DrawIndirect(ctx, mode, ctx->DrawIndirectBuffer, offset,
primcount, stride, NULL, 0, NULL);
if (MESA_DEBUG_FLAGS & DEBUG_ALWAYS_FLUSH)
_mesa_flush(ctx);
}
static void
vbo_validated_drawelementsindirect(struct gl_context *ctx,
GLenum mode, GLenum type,
const GLvoid *indirect)
{
struct _mesa_index_buffer ib;
ib.count = 0; /* unknown */
ib.index_size = sizeof_ib_type(type);
ib.obj = ctx->Array.VAO->IndexBufferObj;
ib.ptr = NULL;
ctx->Driver.DrawIndirect(ctx, mode,
ctx->DrawIndirectBuffer, (GLsizeiptr) indirect,
1 /* draw_count */ , 20 /* stride */ ,
NULL, 0, &ib);
if (MESA_DEBUG_FLAGS & DEBUG_ALWAYS_FLUSH)
_mesa_flush(ctx);
}
static void
vbo_validated_multidrawelementsindirect(struct gl_context *ctx,
GLenum mode, GLenum type,
const GLvoid *indirect,
GLsizei primcount, GLsizei stride)
{
struct _mesa_index_buffer ib;
GLsizeiptr offset = (GLsizeiptr) indirect;
if (primcount == 0)
return;
/* NOTE: IndexBufferObj is guaranteed to be a VBO. */
ib.count = 0; /* unknown */
ib.index_size = sizeof_ib_type(type);
ib.obj = ctx->Array.VAO->IndexBufferObj;
ib.ptr = NULL;
ctx->Driver.DrawIndirect(ctx, mode,
ctx->DrawIndirectBuffer, offset,
primcount, stride, NULL, 0, &ib);
if (MESA_DEBUG_FLAGS & DEBUG_ALWAYS_FLUSH)
_mesa_flush(ctx);
}
/**
* Like [Multi]DrawArrays/Elements, but they take most arguments from
* a buffer object.
*/
static void GLAPIENTRY
vbo_exec_DrawArraysIndirect(GLenum mode, const GLvoid *indirect)
{
GET_CURRENT_CONTEXT(ctx);
if (MESA_VERBOSE & VERBOSE_DRAW)
_mesa_debug(ctx, "glDrawArraysIndirect(%s, %p)\n",
_mesa_enum_to_string(mode), indirect);
/* From the ARB_draw_indirect spec:
*
* "Initially zero is bound to DRAW_INDIRECT_BUFFER. In the
* compatibility profile, this indicates that DrawArraysIndirect and
* DrawElementsIndirect are to source their arguments directly from the
* pointer passed as their <indirect> parameters."
*/
if (ctx->API == API_OPENGL_COMPAT &&
!_mesa_is_bufferobj(ctx->DrawIndirectBuffer)) {
DrawArraysIndirectCommand *cmd = (DrawArraysIndirectCommand *) indirect;
vbo_exec_DrawArraysInstancedBaseInstance(mode, cmd->first, cmd->count,
cmd->primCount,
cmd->baseInstance);
return;
}
FLUSH_FOR_DRAW(ctx);
if (_mesa_is_no_error_enabled(ctx)) {
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (ctx->NewState)
_mesa_update_state(ctx);
} else {
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (!_mesa_validate_DrawArraysIndirect(ctx, mode, indirect))
return;
}
if (skip_validated_draw(ctx))
return;
vbo_validated_drawarraysindirect(ctx, mode, indirect);
}
static void GLAPIENTRY
vbo_exec_DrawElementsIndirect(GLenum mode, GLenum type, const GLvoid *indirect)
{
GET_CURRENT_CONTEXT(ctx);
if (MESA_VERBOSE & VERBOSE_DRAW)
_mesa_debug(ctx, "glDrawElementsIndirect(%s, %s, %p)\n",
_mesa_enum_to_string(mode),
_mesa_enum_to_string(type), indirect);
/* From the ARB_draw_indirect spec:
*
* "Initially zero is bound to DRAW_INDIRECT_BUFFER. In the
* compatibility profile, this indicates that DrawArraysIndirect and
* DrawElementsIndirect are to source their arguments directly from the
* pointer passed as their <indirect> parameters."
*/
if (ctx->API == API_OPENGL_COMPAT &&
!_mesa_is_bufferobj(ctx->DrawIndirectBuffer)) {
/*
* Unlike regular DrawElementsInstancedBaseVertex commands, the indices
* may not come from a client array and must come from an index buffer.
* If no element array buffer is bound, an INVALID_OPERATION error is
* generated.
*/
if (!_mesa_is_bufferobj(ctx->Array.VAO->IndexBufferObj)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glDrawElementsIndirect(no buffer bound "
"to GL_ELEMENT_ARRAY_BUFFER)");
} else {
DrawElementsIndirectCommand *cmd =
(DrawElementsIndirectCommand *) indirect;
/* Convert offset to pointer */
void *offset = (void *)
((cmd->firstIndex * _mesa_sizeof_type(type)) & 0xffffffffUL);
vbo_exec_DrawElementsInstancedBaseVertexBaseInstance(mode, cmd->count,
type, offset,
cmd->primCount,
cmd->baseVertex,
cmd->baseInstance);
}
return;
}
FLUSH_FOR_DRAW(ctx);
if (_mesa_is_no_error_enabled(ctx)) {
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (ctx->NewState)
_mesa_update_state(ctx);
} else {
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (!_mesa_validate_DrawElementsIndirect(ctx, mode, type, indirect))
return;
}
if (skip_validated_draw(ctx))
return;
vbo_validated_drawelementsindirect(ctx, mode, type, indirect);
}
static void GLAPIENTRY
vbo_exec_MultiDrawArraysIndirect(GLenum mode, const GLvoid *indirect,
GLsizei primcount, GLsizei stride)
{
GET_CURRENT_CONTEXT(ctx);
if (MESA_VERBOSE & VERBOSE_DRAW)
_mesa_debug(ctx, "glMultiDrawArraysIndirect(%s, %p, %i, %i)\n",
_mesa_enum_to_string(mode), indirect, primcount, stride);
/* If <stride> is zero, the array elements are treated as tightly packed. */
if (stride == 0)
stride = sizeof(DrawArraysIndirectCommand);
/* From the ARB_draw_indirect spec:
*
* "Initially zero is bound to DRAW_INDIRECT_BUFFER. In the
* compatibility profile, this indicates that DrawArraysIndirect and
* DrawElementsIndirect are to source their arguments directly from the
* pointer passed as their <indirect> parameters."
*/
if (ctx->API == API_OPENGL_COMPAT &&
!_mesa_is_bufferobj(ctx->DrawIndirectBuffer)) {
if (!_mesa_valid_draw_indirect_multi(ctx, primcount, stride,
"glMultiDrawArraysIndirect"))
return;
const ubyte *ptr = (const ubyte *) indirect;
for (unsigned i = 0; i < primcount; i++) {
DrawArraysIndirectCommand *cmd = (DrawArraysIndirectCommand *) ptr;
vbo_exec_DrawArraysInstancedBaseInstance(mode, cmd->first,
cmd->count, cmd->primCount,
cmd->baseInstance);
if (stride == 0) {
ptr += sizeof(DrawArraysIndirectCommand);
} else {
ptr += stride;
}
}
return;
}
FLUSH_FOR_DRAW(ctx);
if (_mesa_is_no_error_enabled(ctx)) {
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (ctx->NewState)
_mesa_update_state(ctx);
} else {
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (!_mesa_validate_MultiDrawArraysIndirect(ctx, mode, indirect,
primcount, stride))
return;
}
if (skip_validated_draw(ctx))
return;
vbo_validated_multidrawarraysindirect(ctx, mode, indirect,
primcount, stride);
}
static void GLAPIENTRY
vbo_exec_MultiDrawElementsIndirect(GLenum mode, GLenum type,
const GLvoid *indirect,
GLsizei primcount, GLsizei stride)
{
GET_CURRENT_CONTEXT(ctx);
if (MESA_VERBOSE & VERBOSE_DRAW)
_mesa_debug(ctx, "glMultiDrawElementsIndirect(%s, %s, %p, %i, %i)\n",
_mesa_enum_to_string(mode),
_mesa_enum_to_string(type), indirect, primcount, stride);
/* If <stride> is zero, the array elements are treated as tightly packed. */
if (stride == 0)
stride = sizeof(DrawElementsIndirectCommand);
/* From the ARB_draw_indirect spec:
*
* "Initially zero is bound to DRAW_INDIRECT_BUFFER. In the
* compatibility profile, this indicates that DrawArraysIndirect and
* DrawElementsIndirect are to source their arguments directly from the
* pointer passed as their <indirect> parameters."
*/
if (ctx->API == API_OPENGL_COMPAT &&
!_mesa_is_bufferobj(ctx->DrawIndirectBuffer)) {
/*
* Unlike regular DrawElementsInstancedBaseVertex commands, the indices
* may not come from a client array and must come from an index buffer.
* If no element array buffer is bound, an INVALID_OPERATION error is
* generated.
*/
if (!_mesa_is_bufferobj(ctx->Array.VAO->IndexBufferObj)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glMultiDrawElementsIndirect(no buffer bound "
"to GL_ELEMENT_ARRAY_BUFFER)");
return;
}
if (!_mesa_valid_draw_indirect_multi(ctx, primcount, stride,
"glMultiDrawArraysIndirect"))
return;
const ubyte *ptr = (const ubyte *) indirect;
for (unsigned i = 0; i < primcount; i++) {
vbo_exec_DrawElementsIndirect(mode, type, ptr);
if (stride == 0) {
ptr += sizeof(DrawElementsIndirectCommand);
} else {
ptr += stride;
}
}
return;
}
FLUSH_FOR_DRAW(ctx);
if (_mesa_is_no_error_enabled(ctx)) {
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (ctx->NewState)
_mesa_update_state(ctx);
} else {
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (!_mesa_validate_MultiDrawElementsIndirect(ctx, mode, type, indirect,
primcount, stride))
return;
}
if (skip_validated_draw(ctx))
return;
vbo_validated_multidrawelementsindirect(ctx, mode, type, indirect,
primcount, stride);
}
static void
vbo_validated_multidrawarraysindirectcount(struct gl_context *ctx,
GLenum mode,
GLintptr indirect,
GLintptr drawcount_offset,
GLsizei maxdrawcount,
GLsizei stride)
{
GLsizeiptr offset = indirect;
if (maxdrawcount == 0)
return;
ctx->Driver.DrawIndirect(ctx, mode,
ctx->DrawIndirectBuffer, offset,
maxdrawcount, stride,
ctx->ParameterBuffer, drawcount_offset, NULL);
if (MESA_DEBUG_FLAGS & DEBUG_ALWAYS_FLUSH)
_mesa_flush(ctx);
}
static void
vbo_validated_multidrawelementsindirectcount(struct gl_context *ctx,
GLenum mode, GLenum type,
GLintptr indirect,
GLintptr drawcount_offset,
GLsizei maxdrawcount,
GLsizei stride)
{
struct _mesa_index_buffer ib;
GLsizeiptr offset = (GLsizeiptr) indirect;
if (maxdrawcount == 0)
return;
/* NOTE: IndexBufferObj is guaranteed to be a VBO. */
ib.count = 0; /* unknown */
ib.index_size = sizeof_ib_type(type);
ib.obj = ctx->Array.VAO->IndexBufferObj;
ib.ptr = NULL;
ctx->Driver.DrawIndirect(ctx, mode,
ctx->DrawIndirectBuffer, offset,
maxdrawcount, stride,
ctx->ParameterBuffer, drawcount_offset, &ib);
if (MESA_DEBUG_FLAGS & DEBUG_ALWAYS_FLUSH)
_mesa_flush(ctx);
}
static void GLAPIENTRY
vbo_exec_MultiDrawArraysIndirectCount(GLenum mode, GLintptr indirect,
GLintptr drawcount_offset,
GLsizei maxdrawcount, GLsizei stride)
{
GET_CURRENT_CONTEXT(ctx);
if (MESA_VERBOSE & VERBOSE_DRAW)
_mesa_debug(ctx, "glMultiDrawArraysIndirectCountARB"
"(%s, %lx, %lx, %i, %i)\n",
_mesa_enum_to_string(mode),
(unsigned long) indirect, (unsigned long) drawcount_offset,
maxdrawcount, stride);
/* If <stride> is zero, the array elements are treated as tightly packed. */
if (stride == 0)
stride = 4 * sizeof(GLuint); /* sizeof(DrawArraysIndirectCommand) */
FLUSH_FOR_DRAW(ctx);
if (_mesa_is_no_error_enabled(ctx)) {
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (ctx->NewState)
_mesa_update_state(ctx);
} else {
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (!_mesa_validate_MultiDrawArraysIndirectCount(ctx, mode,
indirect,
drawcount_offset,
maxdrawcount, stride))
return;
}
if (skip_validated_draw(ctx))
return;
vbo_validated_multidrawarraysindirectcount(ctx, mode, indirect,
drawcount_offset,
maxdrawcount, stride);
}
static void GLAPIENTRY
vbo_exec_MultiDrawElementsIndirectCount(GLenum mode, GLenum type,
GLintptr indirect,
GLintptr drawcount_offset,
GLsizei maxdrawcount, GLsizei stride)
{
GET_CURRENT_CONTEXT(ctx);
if (MESA_VERBOSE & VERBOSE_DRAW)
_mesa_debug(ctx, "glMultiDrawElementsIndirectCountARB"
"(%s, %s, %lx, %lx, %i, %i)\n",
_mesa_enum_to_string(mode), _mesa_enum_to_string(type),
(unsigned long) indirect, (unsigned long) drawcount_offset,
maxdrawcount, stride);
/* If <stride> is zero, the array elements are treated as tightly packed. */
if (stride == 0)
stride = 5 * sizeof(GLuint); /* sizeof(DrawElementsIndirectCommand) */
FLUSH_FOR_DRAW(ctx);
if (_mesa_is_no_error_enabled(ctx)) {
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (ctx->NewState)
_mesa_update_state(ctx);
} else {
_mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx));
if (!_mesa_validate_MultiDrawElementsIndirectCount(ctx, mode, type,
indirect,
drawcount_offset,
maxdrawcount, stride))
return;
}
if (skip_validated_draw(ctx))
return;
vbo_validated_multidrawelementsindirectcount(ctx, mode, type, indirect,
drawcount_offset, maxdrawcount,
stride);
}
/**
* Initialize the dispatch table with the VBO functions for drawing.
*/
void
vbo_initialize_exec_dispatch(const struct gl_context *ctx,
struct _glapi_table *exec)
{
SET_DrawArrays(exec, vbo_exec_DrawArrays);
SET_DrawElements(exec, vbo_exec_DrawElements);
if (_mesa_is_desktop_gl(ctx) || _mesa_is_gles3(ctx)) {
SET_DrawRangeElements(exec, vbo_exec_DrawRangeElements);
}
SET_MultiDrawArrays(exec, vbo_exec_MultiDrawArrays);
SET_MultiDrawElementsEXT(exec, vbo_exec_MultiDrawElements);
if (ctx->API == API_OPENGL_COMPAT) {
SET_Rectf(exec, vbo_exec_Rectf);
SET_EvalMesh1(exec, vbo_exec_EvalMesh1);
SET_EvalMesh2(exec, vbo_exec_EvalMesh2);
}
if (ctx->API != API_OPENGLES &&
ctx->Extensions.ARB_draw_elements_base_vertex) {
SET_DrawElementsBaseVertex(exec, vbo_exec_DrawElementsBaseVertex);
SET_MultiDrawElementsBaseVertex(exec,
vbo_exec_MultiDrawElementsBaseVertex);
if (_mesa_is_desktop_gl(ctx) || _mesa_is_gles3(ctx)) {
SET_DrawRangeElementsBaseVertex(exec,
vbo_exec_DrawRangeElementsBaseVertex);
SET_DrawElementsInstancedBaseVertex(exec,
vbo_exec_DrawElementsInstancedBaseVertex);
}
}
if (_mesa_is_desktop_gl(ctx) || _mesa_is_gles3(ctx)) {
SET_DrawArraysInstancedBaseInstance(exec,
vbo_exec_DrawArraysInstancedBaseInstance);
SET_DrawElementsInstancedBaseInstance(exec,
vbo_exec_DrawElementsInstancedBaseInstance);
SET_DrawElementsInstancedBaseVertexBaseInstance(exec,
vbo_exec_DrawElementsInstancedBaseVertexBaseInstance);
}
if (_mesa_is_desktop_gl(ctx) || _mesa_is_gles31(ctx)) {
SET_DrawArraysIndirect(exec, vbo_exec_DrawArraysIndirect);
SET_DrawElementsIndirect(exec, vbo_exec_DrawElementsIndirect);
}
if (_mesa_is_desktop_gl(ctx) || _mesa_is_gles3(ctx)) {
SET_DrawArraysInstancedARB(exec, vbo_exec_DrawArraysInstanced);
SET_DrawElementsInstancedARB(exec, vbo_exec_DrawElementsInstanced);
}
if (_mesa_is_desktop_gl(ctx)) {
SET_DrawTransformFeedback(exec, vbo_exec_DrawTransformFeedback);
SET_DrawTransformFeedbackStream(exec,
vbo_exec_DrawTransformFeedbackStream);
SET_DrawTransformFeedbackInstanced(exec,
vbo_exec_DrawTransformFeedbackInstanced);
SET_DrawTransformFeedbackStreamInstanced(exec,
vbo_exec_DrawTransformFeedbackStreamInstanced);
SET_MultiDrawArraysIndirect(exec, vbo_exec_MultiDrawArraysIndirect);
SET_MultiDrawElementsIndirect(exec, vbo_exec_MultiDrawElementsIndirect);
SET_MultiDrawArraysIndirectCountARB(exec,
vbo_exec_MultiDrawArraysIndirectCount);
SET_MultiDrawElementsIndirectCountARB(exec,
vbo_exec_MultiDrawElementsIndirectCount);
}
}
/**
* The following functions are only used for OpenGL ES 1/2 support.
* And some aren't even supported (yet) in ES 1/2.
*/
void GLAPIENTRY
_mesa_DrawArrays(GLenum mode, GLint first, GLsizei count)
{
vbo_exec_DrawArrays(mode, first, count);
}
void GLAPIENTRY
_mesa_DrawArraysInstanced(GLenum mode, GLint first, GLsizei count,
GLsizei primcount)
{
vbo_exec_DrawArraysInstanced(mode, first, count, primcount);
}
void GLAPIENTRY
_mesa_DrawElements(GLenum mode, GLsizei count, GLenum type,
const GLvoid *indices)
{
vbo_exec_DrawElements(mode, count, type, indices);
}
void GLAPIENTRY
_mesa_DrawElementsBaseVertex(GLenum mode, GLsizei count, GLenum type,
const GLvoid *indices, GLint basevertex)
{
vbo_exec_DrawElementsBaseVertex(mode, count, type, indices, basevertex);
}
void GLAPIENTRY
_mesa_DrawRangeElements(GLenum mode, GLuint start, GLuint end, GLsizei count,
GLenum type, const GLvoid * indices)
{
vbo_exec_DrawRangeElements(mode, start, end, count, type, indices);
}
void GLAPIENTRY
_mesa_DrawRangeElementsBaseVertex(GLenum mode, GLuint start, GLuint end,
GLsizei count, GLenum type,
const GLvoid *indices, GLint basevertex)
{
vbo_exec_DrawRangeElementsBaseVertex(mode, start, end, count, type,
indices, basevertex);
}
void GLAPIENTRY
_mesa_MultiDrawElementsEXT(GLenum mode, const GLsizei *count, GLenum type,
const GLvoid ** indices, GLsizei primcount)
{
vbo_exec_MultiDrawElements(mode, count, type, indices, primcount);
}
void GLAPIENTRY
_mesa_MultiDrawElementsBaseVertex(GLenum mode,
const GLsizei *count, GLenum type,
const GLvoid **indices, GLsizei primcount,
const GLint *basevertex)
{
vbo_exec_MultiDrawElementsBaseVertex(mode, count, type, indices,
primcount, basevertex);
}
void GLAPIENTRY
_mesa_DrawTransformFeedback(GLenum mode, GLuint name)
{
vbo_exec_DrawTransformFeedback(mode, name);
}