diff options
Diffstat (limited to 'src/mesa/vbo/vbo_exec_array.c')
| -rw-r--r-- | src/mesa/vbo/vbo_exec_array.c | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/src/mesa/vbo/vbo_exec_array.c b/src/mesa/vbo/vbo_exec_array.c index 4148469ef45..12911f5750c 100644 --- a/src/mesa/vbo/vbo_exec_array.c +++ b/src/mesa/vbo/vbo_exec_array.c @@ -33,6 +33,7 @@ #include "main/api_noop.h" #include "main/varray.h" #include "main/bufferobj.h" +#include "main/macros.h" #include "glapi/dispatch.h" #include "vbo_context.h" @@ -721,6 +722,152 @@ vbo_exec_DrawElements(GLenum mode, GLsizei count, GLenum type, count, type, indices); } +/* Inner support for both _mesa_DrawElements and _mesa_DrawRangeElements */ +static void +vbo_validated_multidrawelements(GLcontext *ctx, GLenum mode, + const GLsizei *count, GLenum type, + const GLvoid **indices, GLsizei primcount) +{ + struct vbo_context *vbo = vbo_context(ctx); + struct vbo_exec_context *exec = &vbo->exec; + struct _mesa_index_buffer ib; + struct _mesa_prim *prim; + unsigned int index_type_size = 0; + uintptr_t min_index_ptr, max_index_ptr; + GLboolean fallback = GL_FALSE; + int i; + + if (primcount == 0) + return; + + FLUSH_CURRENT( ctx, 0 ); + + if (ctx->NewState) + _mesa_update_state( ctx ); + + if (!_mesa_valid_to_render(ctx, "glMultiDrawElements")) { + return; + } + + if (ctx->NewState) + _mesa_update_state( ctx ); + + prim = _mesa_calloc(primcount * sizeof(*prim)); + if (prim == NULL) { + _mesa_error(ctx, GL_OUT_OF_MEMORY, "glMultiDrawElements"); + return; + } + + /* Decide if we can do this all as one set of primitives sharing the + * same index buffer, or if we have to reset the index pointer per primitive. + */ + bind_arrays( ctx ); + + switch (type) { + case GL_UNSIGNED_INT: + index_type_size = 4; + break; + case GL_UNSIGNED_SHORT: + index_type_size = 2; + break; + case GL_UNSIGNED_BYTE: + index_type_size = 1; + break; + default: + assert(0); + } + + 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. + */ + 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; + } + } + } + + /* 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.ElementArrayBufferObj)) + fallback = GL_TRUE; + + if (!fallback) { + ib.count = (max_index_ptr - min_index_ptr) / index_type_size; + ib.type = type; + ib.obj = ctx->Array.ElementArrayBufferObj; + 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; + } + + vbo->draw_prims(ctx, exec->array.inputs, prim, primcount, &ib, + GL_FALSE, ~0, ~0); + } else { + for (i = 0; i < primcount; i++) { + ib.count = count[i]; + ib.type = type; + ib.obj = ctx->Array.ElementArrayBufferObj; + 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; + } + + vbo->draw_prims(ctx, exec->array.inputs, prim, 1, &ib, + GL_FALSE, ~0, ~0); + } + _mesa_free(prim); +} + +static void GLAPIENTRY +vbo_exec_MultiDrawElements(GLenum mode, + const GLsizei *count, GLenum type, + const GLvoid **indices, + GLsizei primcount) +{ + GET_CURRENT_CONTEXT(ctx); + GLint i; + + ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); + + for (i = 0; i < primcount; i++) { + if (!_mesa_validate_DrawElements( ctx, mode, count[i], type, indices[i] )) + return; + } + + vbo_validated_multidrawelements(ctx, mode, count, type, indices, primcount); +} + + /*********************************************************************** * Initialization @@ -733,10 +880,12 @@ vbo_exec_array_init( struct vbo_exec_context *exec ) exec->vtxfmt.DrawArrays = vbo_exec_DrawArrays; exec->vtxfmt.DrawElements = vbo_exec_DrawElements; exec->vtxfmt.DrawRangeElements = vbo_exec_DrawRangeElements; + exec->vtxfmt.MultiDrawElementsEXT = vbo_exec_MultiDrawElements; #else exec->vtxfmt.DrawArrays = _mesa_noop_DrawArrays; exec->vtxfmt.DrawElements = _mesa_noop_DrawElements; exec->vtxfmt.DrawRangeElements = _mesa_noop_DrawRangeElements; + exec->vtxfmt.MultiDrawElementsEXT = _mesa_noop_MultiDrawElements; #endif } @@ -772,3 +921,11 @@ _mesa_DrawRangeElements(GLenum mode, GLuint start, GLuint end, GLsizei count, { vbo_exec_DrawRangeElements(mode, start, end, count, type, indices); } + +/* GL_EXT_multi_draw_arrays */ +void GLAPIENTRY +_mesa_MultiDrawElementsEXT(GLenum mode, const GLsizei *count, GLenum type, + const GLvoid **indices, GLsizei primcount) +{ + vbo_exec_MultiDrawElements(mode, count, type, indices, primcount); +} |