mesa: Add binding point for indirect buffer

Based on part of Patch 2 of Christoph Bumiller's ARB_draw_indirect series.

Signed-off-by: Chris Forbes <[email protected]>
Reviewed-by: Kenneth Graunke <[email protected]>
Reviewed-by: Eric Anholt <[email protected]>

1 files changed, 14 insertions, 0 deletions

diff --git a/src/mesa/main/bufferobj.c b/src/mesa/main/bufferobj.c
index b27f592e842..8b5ebc48904 100644
--- a/src/mesa/main/bufferobj.c
+++ b/src/mesa/main/bufferobj.c
@@ -86,6 +86,12 @@ get_buffer_target(struct gl_context *ctx, GLenum target)
       return &ctx->CopyReadBuffer;
    case GL_COPY_WRITE_BUFFER:
       return &ctx->CopyWriteBuffer;
+   case GL_DRAW_INDIRECT_BUFFER:
+      if (ctx->API == API_OPENGL_CORE &&
+          ctx->Extensions.ARB_draw_indirect) {
+         return &ctx->DrawIndirectBuffer;
+      }
+      break;
    case GL_TRANSFORM_FEEDBACK_BUFFER:
       if (ctx->Extensions.EXT_transform_feedback) {
          return &ctx->TransformFeedback.CurrentBuffer;
@@ -626,6 +632,9 @@ _mesa_init_buffer_objects( struct gl_context *ctx )
    _mesa_reference_buffer_object(ctx, &ctx->UniformBuffer,
 				 ctx->Shared->NullBufferObj);
 
+   _mesa_reference_buffer_object(ctx, &ctx->DrawIndirectBuffer,
+				 ctx->Shared->NullBufferObj);
+
    for (i = 0; i < MAX_COMBINED_UNIFORM_BUFFERS; i++) {
       _mesa_reference_buffer_object(ctx,
 				    &ctx->UniformBufferBindings[i].BufferObject,
@@ -875,6 +884,11 @@ _mesa_DeleteBuffers(GLsizei n, const GLuint *ids)
             _mesa_BindBuffer( GL_ELEMENT_ARRAY_BUFFER_ARB, 0 );
          }
 
+         /* unbind ARB_draw_indirect binding point */
+         if (ctx->DrawIndirectBuffer == bufObj) {
+            _mesa_BindBuffer( GL_DRAW_INDIRECT_BUFFER, 0 );
+         }
+
          /* unbind ARB_copy_buffer binding points */
          if (ctx->CopyReadBuffer == bufObj) {
             _mesa_BindBuffer( GL_COPY_READ_BUFFER, 0 );