[Mesa-dev] [PATCH 3/9] mesa: Add QueryBuffer to context

[Ilia Mirkin]

From: Rafal Mielniczuk <rafal.mielniczuk2 at gmail.com>

Add QueryBuffer and initialise it to NullBufferObj on start

Signed-off-by: Rafal Mielniczuk <rafal.mielniczuk2 at gmail.com>
[imirkin: also release QueryBuffer on free]
Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
---
 src/mesa/main/bufferobj.c | 14 ++++++++++++++
 src/mesa/main/mtypes.h    |  2 ++
 2 files changed, 16 insertions(+)

diff --git a/src/mesa/main/bufferobj.c b/src/mesa/main/bufferobj.c
index 14ee8c8..abaa892 100644
--- a/src/mesa/main/bufferobj.c
+++ b/src/mesa/main/bufferobj.c
@@ -120,6 +120,10 @@ get_buffer_target(struct gl_context *ctx, GLenum target)
       return &ctx->CopyReadBuffer;
    case GL_COPY_WRITE_BUFFER:
       return &ctx->CopyWriteBuffer;
+   case GL_QUERY_BUFFER:
+      if (_mesa_is_desktop_gl(ctx) && ctx->Extensions.ARB_query_buffer_object)
+         return &ctx->QueryBuffer;
+      break;
    case GL_DRAW_INDIRECT_BUFFER:
       if ((ctx->API == API_OPENGL_CORE &&
            ctx->Extensions.ARB_draw_indirect) ||
@@ -877,6 +881,9 @@ _mesa_init_buffer_objects( struct gl_context *ctx )
    _mesa_reference_buffer_object(ctx, &ctx->DispatchIndirectBuffer,
 				 ctx->Shared->NullBufferObj);
 
+   _mesa_reference_buffer_object(ctx, &ctx->QueryBuffer,
+                                 ctx->Shared->NullBufferObj);
+
    for (i = 0; i < MAX_COMBINED_UNIFORM_BUFFERS; i++) {
       _mesa_reference_buffer_object(ctx,
 				    &ctx->UniformBufferBindings[i].BufferObject,
@@ -925,6 +932,8 @@ _mesa_free_buffer_objects( struct gl_context *ctx )
 
    _mesa_reference_buffer_object(ctx, &ctx->DispatchIndirectBuffer, NULL);
 
+   _mesa_reference_buffer_object(ctx, &ctx->QueryBuffer, NULL);
+
    for (i = 0; i < MAX_COMBINED_UNIFORM_BUFFERS; i++) {
       _mesa_reference_buffer_object(ctx,
 				    &ctx->UniformBufferBindings[i].BufferObject,
@@ -1348,6 +1357,11 @@ _mesa_DeleteBuffers(GLsizei n, const GLuint *ids)
             _mesa_BindBuffer(GL_EXTERNAL_VIRTUAL_MEMORY_BUFFER_AMD, 0);
          }
 
+         /* unbind query buffer binding point */
+         if (ctx->QueryBuffer == bufObj) {
+            _mesa_BindBuffer(GL_QUERY_BUFFER, 0);
+         }
+
          /* The ID is immediately freed for re-use */
          _mesa_HashRemove(ctx->Shared->BufferObjects, ids[i]);
          /* Make sure we do not run into the classic ABA problem on bind.
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index 372bce8..4e96bc2 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -4367,6 +4367,8 @@ struct gl_context
    struct gl_buffer_object *CopyReadBuffer; /**< GL_ARB_copy_buffer */
    struct gl_buffer_object *CopyWriteBuffer; /**< GL_ARB_copy_buffer */
 
+   struct gl_buffer_object *QueryBuffer; /**< GL_ARB_query_buffer_object */
+
    /**
     * Current GL_ARB_uniform_buffer_object binding referenced by
     * GL_UNIFORM_BUFFER target for glBufferData, glMapBuffer, etc.
-- 
2.4.10