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-rw-r--r--src/mesa/main/framebuffer.c21
-rw-r--r--src/mesa/main/framebuffer.h5
2 files changed, 26 insertions, 0 deletions
diff --git a/src/mesa/main/framebuffer.c b/src/mesa/main/framebuffer.c
index 13887f8f54b..8cbfbd6bcfb 100644
--- a/src/mesa/main/framebuffer.c
+++ b/src/mesa/main/framebuffer.c
@@ -42,6 +42,7 @@
#include "framebuffer.h"
#include "renderbuffer.h"
#include "texobj.h"
+#include "glformats.h"
@@ -899,6 +900,26 @@ _mesa_get_color_read_type(struct gl_context *ctx)
/**
+ * Returns the read renderbuffer for the specified format.
+ */
+struct gl_renderbuffer *
+_mesa_get_read_renderbuffer_for_format(struct gl_context *ctx,
+ GLenum format)
+{
+ struct gl_framebuffer *rfb = ctx->ReadBuffer;
+
+ if (_mesa_is_color_format(format)) {
+ return rfb->Attachment[rfb->_ColorReadBufferIndex].Renderbuffer;
+ } else if (_mesa_is_depth_format(format) ||
+ _mesa_is_depthstencil_format(format)) {
+ return rfb->Attachment[BUFFER_DEPTH].Renderbuffer;
+ } else {
+ return rfb->Attachment[BUFFER_STENCIL].Renderbuffer;
+ }
+}
+
+
+/**
* Print framebuffer info to stderr, for debugging.
*/
void
diff --git a/src/mesa/main/framebuffer.h b/src/mesa/main/framebuffer.h
index ad53d8cbeb0..06db0492544 100644
--- a/src/mesa/main/framebuffer.h
+++ b/src/mesa/main/framebuffer.h
@@ -30,6 +30,7 @@
struct gl_config;
struct gl_context;
+struct gl_renderbuffer;
extern struct gl_framebuffer *
_mesa_create_framebuffer(const struct gl_config *visual);
@@ -96,6 +97,10 @@ _mesa_get_color_read_type(struct gl_context *ctx);
extern GLenum
_mesa_get_color_read_format(struct gl_context *ctx);
+extern struct gl_renderbuffer *
+_mesa_get_read_renderbuffer_for_format(struct gl_context *ctx,
+ GLenum format);
+
extern void
_mesa_print_framebuffer(const struct gl_framebuffer *fb);