gallium: change set_constant_buffer to be UBO-friendly

2 files changed, 13 insertions, 1 deletions

diff --git a/src/gallium/include/pipe/p_context.h b/src/gallium/include/pipe/p_context.h
index 8b4a1588b86..1871b214610 100644
--- a/src/gallium/include/pipe/p_context.h
+++ b/src/gallium/include/pipe/p_context.h
@@ -41,6 +41,7 @@ struct pipe_blend_color;
 struct pipe_blend_state;
 struct pipe_box;
 struct pipe_clip_state;
+struct pipe_constant_buffer;
 struct pipe_depth_stencil_alpha_state;
 struct pipe_draw_info;
 struct pipe_fence_handle;
@@ -194,7 +195,7 @@ struct pipe_context {
 
    void (*set_constant_buffer)( struct pipe_context *,
                                 uint shader, uint index,
-                                struct pipe_resource *buf );
+                                struct pipe_constant_buffer *buf );
 
    void (*set_framebuffer_state)( struct pipe_context *,
                                   const struct pipe_framebuffer_state * );
diff --git a/src/gallium/include/pipe/p_state.h b/src/gallium/include/pipe/p_state.h
index a459a56a760..42510a685bf 100644
--- a/src/gallium/include/pipe/p_state.h
+++ b/src/gallium/include/pipe/p_state.h
@@ -451,6 +451,17 @@ struct pipe_vertex_buffer
 
 
 /**
+ * A constant buffer.  A subrange of an existing buffer can be set
+ * as a constant buffer.
+ */
+struct pipe_constant_buffer {
+   struct pipe_resource *buffer; /**< the actual buffer */
+   unsigned buffer_offset; /**< offset to start of data in buffer, in bytes */
+   unsigned buffer_size;   /**< how much data can be read in shader */
+};
+
+
+/**
  * A stream output target. The structure specifies the range vertices can
  * be written to.
  *