#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"
if (ctx->NewState)
_mesa_update_state( ctx );
- if (!vbo_validate_shaders(ctx)) {
- _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawArrays(bad shader)");
+ if (!_mesa_valid_to_render(ctx, "glDrawArrays")) {
return;
}
if (ctx->NewState)
_mesa_update_state( ctx );
- if (!vbo_validate_shaders(ctx)) {
- _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawRangeElements(bad shader)");
+ if (!_mesa_valid_to_render(ctx, "glDraw[Range]Elements")) {
return;
}
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
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
}
{
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);
+}
projects / mesa.git / blobdiff