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Diffstat (limited to 'src/mesa/main/draw.c')
| -rw-r--r-- | src/mesa/main/draw.c | 2145 |
1 files changed, 2145 insertions, 0 deletions
diff --git a/src/mesa/main/draw.c b/src/mesa/main/draw.c new file mode 100644 index 00000000000..7729a860d02 --- /dev/null +++ b/src/mesa/main/draw.c @@ -0,0 +1,2145 @@ +/************************************************************************** + * + * 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 "arrayobj.h" +#include "glheader.h" +#include "context.h" +#include "state.h" +#include "draw.h" +#include "draw_validate.h" +#include "dispatch.h" +#include "varray.h" +#include "bufferobj.h" +#include "enums.h" +#include "macros.h" +#include "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("_mesa_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 +_mesa_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 +_mesa_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 +_mesa_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 +_mesa_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 +_mesa_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); + + _mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx)); + + if (_mesa_is_no_error_enabled(ctx)) { + if (ctx->NewState) + _mesa_update_state(ctx); + } else { + if (!_mesa_validate_DrawArrays(ctx, mode, count)) + return; + } + + if (0) + check_draw_arrays_data(ctx, start, count); + + _mesa_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 +_mesa_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); + + _mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx)); + + if (_mesa_is_no_error_enabled(ctx)) { + if (ctx->NewState) + _mesa_update_state(ctx); + } else { + if (!_mesa_validate_DrawArraysInstanced(ctx, mode, start, count, + numInstances)) + return; + } + + if (0) + check_draw_arrays_data(ctx, start, count); + + _mesa_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 +_mesa_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); + + _mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx)); + + if (_mesa_is_no_error_enabled(ctx)) { + if (ctx->NewState) + _mesa_update_state(ctx); + } else { + if (!_mesa_validate_DrawArraysInstanced(ctx, mode, first, count, + numInstances)) + return; + } + + if (0) + check_draw_arrays_data(ctx, first, count); + + _mesa_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 +_mesa_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); + + _mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx)); + + if (_mesa_is_no_error_enabled(ctx)) { + if (ctx->NewState) + _mesa_update_state(ctx); + } else { + 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." + */ + _mesa_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 +_mesa_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.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 +_mesa_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); + + _mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx)); + + if (_mesa_is_no_error_enabled(ctx)) { + if (ctx->NewState) + _mesa_update_state(ctx); + } else { + 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; + } + + _mesa_validated_drawrangeelements(ctx, mode, index_bounds_valid, start, end, + count, type, indices, basevertex, 1, 0); +} + + +/** + * Called by glDrawRangeElements() in immediate mode. + */ +static void GLAPIENTRY +_mesa_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); + } + + _mesa_exec_DrawRangeElementsBaseVertex(mode, start, end, count, type, + indices, 0); +} + + +/** + * Called by glDrawElements() in immediate mode. + */ +static void GLAPIENTRY +_mesa_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); + + _mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx)); + + if (_mesa_is_no_error_enabled(ctx)) { + if (ctx->NewState) + _mesa_update_state(ctx); + } else { + if (!_mesa_validate_DrawElements(ctx, mode, count, type, indices)) + return; + } + + _mesa_validated_drawrangeelements(ctx, mode, GL_FALSE, 0, ~0, + count, type, indices, 0, 1, 0); +} + + +/** + * Called by glDrawElementsBaseVertex() in immediate mode. + */ +static void GLAPIENTRY +_mesa_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); + + _mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx)); + + if (_mesa_is_no_error_enabled(ctx)) { + if (ctx->NewState) + _mesa_update_state(ctx); + } else { + if (!_mesa_validate_DrawElements(ctx, mode, count, type, indices)) + return; + } + + _mesa_validated_drawrangeelements(ctx, mode, GL_FALSE, 0, ~0, + count, type, indices, basevertex, 1, 0); +} + + +/** + * Called by glDrawElementsInstanced() in immediate mode. + */ +static void GLAPIENTRY +_mesa_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); + + _mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx)); + + if (_mesa_is_no_error_enabled(ctx)) { + if (ctx->NewState) + _mesa_update_state(ctx); + } else { + if (!_mesa_validate_DrawElementsInstanced(ctx, mode, count, type, + indices, numInstances)) + return; + } + + _mesa_validated_drawrangeelements(ctx, mode, GL_FALSE, 0, ~0, + count, type, indices, 0, numInstances, 0); +} + + +/** + * Called by glDrawElementsInstancedBaseVertex() in immediate mode. + */ +static void GLAPIENTRY +_mesa_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); + + _mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx)); + + if (_mesa_is_no_error_enabled(ctx)) { + if (ctx->NewState) + _mesa_update_state(ctx); + } else { + if (!_mesa_validate_DrawElementsInstanced(ctx, mode, count, type, + indices, numInstances)) + return; + } + + _mesa_validated_drawrangeelements(ctx, mode, GL_FALSE, 0, ~0, + count, type, indices, + basevertex, numInstances, 0); +} + + +/** + * Called by glDrawElementsInstancedBaseInstance() in immediate mode. + */ +static void GLAPIENTRY +_mesa_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); + + _mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx)); + + if (_mesa_is_no_error_enabled(ctx)) { + if (ctx->NewState) + _mesa_update_state(ctx); + } else { + if (!_mesa_validate_DrawElementsInstanced(ctx, mode, count, type, + indices, numInstances)) + return; + } + + _mesa_validated_drawrangeelements(ctx, mode, GL_FALSE, 0, ~0, + count, type, indices, 0, numInstances, + baseInstance); +} + + +/** + * Called by glDrawElementsInstancedBaseVertexBaseInstance() in immediate mode. + */ +static void GLAPIENTRY +_mesa_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); + + _mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx)); + + if (_mesa_is_no_error_enabled(ctx)) { + if (ctx->NewState) + _mesa_update_state(ctx); + } else { + if (!_mesa_validate_DrawElementsInstanced(ctx, mode, count, type, + indices, numInstances)) + return; + } + + _mesa_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 +_mesa_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].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].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 +_mesa_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; + + _mesa_validated_multidrawelements(ctx, mode, count, type, indices, primcount, + NULL); +} + + +static void GLAPIENTRY +_mesa_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); + + _mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx)); + + if (_mesa_is_no_error_enabled(ctx)) { + if (ctx->NewState) + _mesa_update_state(ctx); + } else { + if (!_mesa_validate_MultiDrawElements(ctx, mode, count, type, indices, + primcount)) + return; + } + + if (skip_validated_draw(ctx)) + return; + + _mesa_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 +_mesa_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); + + _mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx)); + + if (_mesa_is_no_error_enabled(ctx)) { + if (ctx->NewState) + _mesa_update_state(ctx); + } else { + 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); + _mesa_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 +_mesa_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); + + _mesa_draw_transform_feedback(ctx, mode, obj, 0, 1); +} + + +static void GLAPIENTRY +_mesa_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); + + _mesa_draw_transform_feedback(ctx, mode, obj, stream, 1); +} + + +static void GLAPIENTRY +_mesa_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); + + _mesa_draw_transform_feedback(ctx, mode, obj, 0, primcount); +} + + +static void GLAPIENTRY +_mesa_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); + + _mesa_draw_transform_feedback(ctx, mode, obj, stream, primcount); +} + + +static void +_mesa_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 +_mesa_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 +_mesa_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 +_mesa_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 +_mesa_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; + + _mesa_exec_DrawArraysInstancedBaseInstance(mode, cmd->first, cmd->count, + cmd->primCount, + cmd->baseInstance); + return; + } + + FLUSH_FOR_DRAW(ctx); + + _mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx)); + + if (_mesa_is_no_error_enabled(ctx)) { + if (ctx->NewState) + _mesa_update_state(ctx); + } else { + if (!_mesa_validate_DrawArraysIndirect(ctx, mode, indirect)) + return; + } + + if (skip_validated_draw(ctx)) + return; + + _mesa_validated_drawarraysindirect(ctx, mode, indirect); +} + + +static void GLAPIENTRY +_mesa_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); + + _mesa_exec_DrawElementsInstancedBaseVertexBaseInstance(mode, cmd->count, + type, offset, + cmd->primCount, + cmd->baseVertex, + cmd->baseInstance); + } + + return; + } + + FLUSH_FOR_DRAW(ctx); + + _mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx)); + + if (_mesa_is_no_error_enabled(ctx)) { + if (ctx->NewState) + _mesa_update_state(ctx); + } else { + if (!_mesa_validate_DrawElementsIndirect(ctx, mode, type, indirect)) + return; + } + + if (skip_validated_draw(ctx)) + return; + + _mesa_validated_drawelementsindirect(ctx, mode, type, indirect); +} + + +static void GLAPIENTRY +_mesa_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; + _mesa_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); + + _mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx)); + + if (_mesa_is_no_error_enabled(ctx)) { + if (ctx->NewState) + _mesa_update_state(ctx); + } else { + if (!_mesa_validate_MultiDrawArraysIndirect(ctx, mode, indirect, + primcount, stride)) + return; + } + + if (skip_validated_draw(ctx)) + return; + + _mesa_validated_multidrawarraysindirect(ctx, mode, indirect, + primcount, stride); +} + + +static void GLAPIENTRY +_mesa_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++) { + _mesa_exec_DrawElementsIndirect(mode, type, ptr); + + if (stride == 0) { + ptr += sizeof(DrawElementsIndirectCommand); + } else { + ptr += stride; + } + } + + return; + } + + FLUSH_FOR_DRAW(ctx); + + _mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx)); + + if (_mesa_is_no_error_enabled(ctx)) { + if (ctx->NewState) + _mesa_update_state(ctx); + } else { + if (!_mesa_validate_MultiDrawElementsIndirect(ctx, mode, type, indirect, + primcount, stride)) + return; + } + + if (skip_validated_draw(ctx)) + return; + + _mesa_validated_multidrawelementsindirect(ctx, mode, type, indirect, + primcount, stride); +} + + +static void +_mesa_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 +_mesa_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 +_mesa_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); + + _mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx)); + + if (_mesa_is_no_error_enabled(ctx)) { + if (ctx->NewState) + _mesa_update_state(ctx); + } else { + if (!_mesa_validate_MultiDrawArraysIndirectCount(ctx, mode, + indirect, + drawcount_offset, + maxdrawcount, stride)) + return; + } + + if (skip_validated_draw(ctx)) + return; + + _mesa_validated_multidrawarraysindirectcount(ctx, mode, indirect, + drawcount_offset, + maxdrawcount, stride); +} + + +static void GLAPIENTRY +_mesa_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); + + _mesa_set_draw_vao(ctx, ctx->Array.VAO, enabled_filter(ctx)); + + if (_mesa_is_no_error_enabled(ctx)) { + if (ctx->NewState) + _mesa_update_state(ctx); + } else { + if (!_mesa_validate_MultiDrawElementsIndirectCount(ctx, mode, type, + indirect, + drawcount_offset, + maxdrawcount, stride)) + return; + } + + if (skip_validated_draw(ctx)) + return; + + _mesa_validated_multidrawelementsindirectcount(ctx, mode, type, indirect, + drawcount_offset, maxdrawcount, + stride); +} + + +/** + * Initialize the dispatch table with the VBO functions for drawing. + */ +void +_mesa_initialize_exec_dispatch(const struct gl_context *ctx, + struct _glapi_table *exec) +{ + SET_DrawArrays(exec, _mesa_exec_DrawArrays); + SET_DrawElements(exec, _mesa_exec_DrawElements); + + if (_mesa_is_desktop_gl(ctx) || _mesa_is_gles3(ctx)) { + SET_DrawRangeElements(exec, _mesa_exec_DrawRangeElements); + } + + SET_MultiDrawArrays(exec, _mesa_exec_MultiDrawArrays); + SET_MultiDrawElementsEXT(exec, _mesa_exec_MultiDrawElements); + + if (ctx->API == API_OPENGL_COMPAT) { + SET_Rectf(exec, _mesa_exec_Rectf); + SET_EvalMesh1(exec, _mesa_exec_EvalMesh1); + SET_EvalMesh2(exec, _mesa_exec_EvalMesh2); + } + + if (ctx->API != API_OPENGLES && + ctx->Extensions.ARB_draw_elements_base_vertex) { + SET_DrawElementsBaseVertex(exec, _mesa_exec_DrawElementsBaseVertex); + SET_MultiDrawElementsBaseVertex(exec, + _mesa_exec_MultiDrawElementsBaseVertex); + + if (_mesa_is_desktop_gl(ctx) || _mesa_is_gles3(ctx)) { + SET_DrawRangeElementsBaseVertex(exec, + _mesa_exec_DrawRangeElementsBaseVertex); + SET_DrawElementsInstancedBaseVertex(exec, + _mesa_exec_DrawElementsInstancedBaseVertex); + } + } + + if (_mesa_is_desktop_gl(ctx) || _mesa_is_gles3(ctx)) { + SET_DrawArraysInstancedBaseInstance(exec, + _mesa_exec_DrawArraysInstancedBaseInstance); + SET_DrawElementsInstancedBaseInstance(exec, + _mesa_exec_DrawElementsInstancedBaseInstance); + SET_DrawElementsInstancedBaseVertexBaseInstance(exec, + _mesa_exec_DrawElementsInstancedBaseVertexBaseInstance); + } + + if (_mesa_is_desktop_gl(ctx) || _mesa_is_gles31(ctx)) { + SET_DrawArraysIndirect(exec, _mesa_exec_DrawArraysIndirect); + SET_DrawElementsIndirect(exec, _mesa_exec_DrawElementsIndirect); + } + + if (_mesa_is_desktop_gl(ctx) || _mesa_is_gles3(ctx)) { + SET_DrawArraysInstancedARB(exec, _mesa_exec_DrawArraysInstanced); + SET_DrawElementsInstancedARB(exec, _mesa_exec_DrawElementsInstanced); + } + + if (_mesa_is_desktop_gl(ctx)) { + SET_DrawTransformFeedback(exec, _mesa_exec_DrawTransformFeedback); + SET_DrawTransformFeedbackStream(exec, + _mesa_exec_DrawTransformFeedbackStream); + SET_DrawTransformFeedbackInstanced(exec, + _mesa_exec_DrawTransformFeedbackInstanced); + SET_DrawTransformFeedbackStreamInstanced(exec, + _mesa_exec_DrawTransformFeedbackStreamInstanced); + SET_MultiDrawArraysIndirect(exec, _mesa_exec_MultiDrawArraysIndirect); + SET_MultiDrawElementsIndirect(exec, _mesa_exec_MultiDrawElementsIndirect); + SET_MultiDrawArraysIndirectCountARB(exec, + _mesa_exec_MultiDrawArraysIndirectCount); + SET_MultiDrawElementsIndirectCountARB(exec, + _mesa_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) +{ + _mesa_exec_DrawArrays(mode, first, count); +} + + +void GLAPIENTRY +_mesa_DrawArraysInstanced(GLenum mode, GLint first, GLsizei count, + GLsizei primcount) +{ + _mesa_exec_DrawArraysInstanced(mode, first, count, primcount); +} + + +void GLAPIENTRY +_mesa_DrawElements(GLenum mode, GLsizei count, GLenum type, + const GLvoid *indices) +{ + _mesa_exec_DrawElements(mode, count, type, indices); +} + + +void GLAPIENTRY +_mesa_DrawElementsBaseVertex(GLenum mode, GLsizei count, GLenum type, + const GLvoid *indices, GLint basevertex) +{ + _mesa_exec_DrawElementsBaseVertex(mode, count, type, indices, basevertex); +} + + +void GLAPIENTRY +_mesa_DrawRangeElements(GLenum mode, GLuint start, GLuint end, GLsizei count, + GLenum type, const GLvoid * indices) +{ + _mesa_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) +{ + _mesa_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) +{ + _mesa_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) +{ + _mesa_exec_MultiDrawElementsBaseVertex(mode, count, type, indices, + primcount, basevertex); +} + + +void GLAPIENTRY +_mesa_DrawTransformFeedback(GLenum mode, GLuint name) +{ + _mesa_exec_DrawTransformFeedback(mode, name); +} |