On Thu, Jun 28, 2018 at 2:46 AM, Timothy Arceri <[email protected]> wrote:
> ---
> src/mesa/main/bufferobj.c | 3 +-
> src/mesa/main/extensions_table.h | 2 +-
> src/mesa/vbo/vbo_exec_array.c | 66 +++++++++++++++++++++++++++++++-
> 3 files changed, 67 insertions(+), 4 deletions(-)
>
> diff --git a/src/mesa/main/bufferobj.c b/src/mesa/main/bufferobj.c
> index 67f9cd0a902..1d1e51bc015 100644
> --- a/src/mesa/main/bufferobj.c
> +++ b/src/mesa/main/bufferobj.c
> @@ -129,8 +129,7 @@ get_buffer_target(struct gl_context *ctx, GLenum target)
> return &ctx->QueryBuffer;
> break;
> case GL_DRAW_INDIRECT_BUFFER:
> - if ((ctx->API == API_OPENGL_CORE &&
> - ctx->Extensions.ARB_draw_indirect) ||
> + if ((_mesa_is_desktop_gl(ctx) && ctx->Extensions.ARB_draw_indirect) ||
> _mesa_is_gles31(ctx)) {
> return &ctx->DrawIndirectBuffer;
> }
> diff --git a/src/mesa/main/extensions_table.h
> b/src/mesa/main/extensions_table.h
> index f79a52cee8c..1446a4bd421 100644
> --- a/src/mesa/main/extensions_table.h
> +++ b/src/mesa/main/extensions_table.h
> @@ -58,7 +58,7 @@ EXT(ARB_direct_state_access , dummy_true
> EXT(ARB_draw_buffers , dummy_true
> , GLL, GLC, x , x , 2002)
> EXT(ARB_draw_buffers_blend , ARB_draw_buffers_blend
> , GLL, GLC, x , x , 2009)
> EXT(ARB_draw_elements_base_vertex , ARB_draw_elements_base_vertex
> , GLL, GLC, x , x , 2009)
> -EXT(ARB_draw_indirect , ARB_draw_indirect
> , x , GLC, x , x , 2010)
> +EXT(ARB_draw_indirect , ARB_draw_indirect
> , GLL, GLC, x , x , 2010)
> EXT(ARB_draw_instanced , ARB_draw_instanced
> , GLL, GLC, x , x , 2008)
> EXT(ARB_enhanced_layouts , ARB_enhanced_layouts
> , GLL, GLC, x , x , 2013)
> EXT(ARB_explicit_attrib_location , ARB_explicit_attrib_location
> , GLL, GLC, x , x , 2009)
> diff --git a/src/mesa/vbo/vbo_exec_array.c b/src/mesa/vbo/vbo_exec_array.c
> index 792907ac044..0d92de2e3ad 100644
> --- a/src/mesa/vbo/vbo_exec_array.c
> +++ b/src/mesa/vbo/vbo_exec_array.c
> @@ -39,6 +39,21 @@
> #include "main/macros.h"
> #include "main/transformfeedback.h"
>
> +typedef struct {
> + GLuint count;
> + GLuint primCount;
> + GLuint first;
> + GLuint reservedMustBeZero;
> +} DrawArraysIndirectCommand;
> +
> +typedef struct {
> + GLuint count;
> + GLuint primCount;
> + GLuint firstIndex;
> + GLint baseVertex;
> + GLuint reservedMustBeZero;
> +} DrawElementsIndirectCommand;
> +
reservedMustBeZero is redefined by ARB_base_instance. I'm sure you'll
find out what needs to be changed here. :)
Marek
>
> /**
> * Check that element 'j' of the array has reasonable data.
> @@ -1616,6 +1631,20 @@ vbo_exec_DrawArraysIndirect(GLenum mode, const GLvoid
> *indirect)
> _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_DrawArraysInstanced(mode, cmd->first, cmd->count,
> cmd->primCount);
> + return;
> + }
> +
> FLUSH_FOR_DRAW(ctx);
>
> if (_mesa_is_no_error_enabled(ctx)) {
> @@ -1647,6 +1676,41 @@ vbo_exec_DrawElementsIndirect(GLenum mode, GLenum
> type, const GLvoid *indirect)
> _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_DrawElementsInstancedBaseVertex(mode, cmd->count, type,
> + offset, cmd->primCount,
> + cmd->baseVertex);
> + }
> +
> + return;
> + }
> +
> FLUSH_FOR_DRAW(ctx);
>
> if (_mesa_is_no_error_enabled(ctx)) {
> @@ -1933,7 +1997,7 @@ vbo_initialize_exec_dispatch(const struct gl_context
> *ctx,
>
> vbo_exec_DrawElementsInstancedBaseVertexBaseInstance);
> }
>
> - if (ctx->API == API_OPENGL_CORE || _mesa_is_gles31(ctx)) {
> + if (_mesa_is_desktop_gl(ctx) || _mesa_is_gles31(ctx)) {
> SET_DrawArraysIndirect(exec, vbo_exec_DrawArraysIndirect);
> SET_DrawElementsIndirect(exec, vbo_exec_DrawElementsIndirect);
> }
> --
> 2.17.1
>
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