Major check-in of changes for GL_EXT_framebuffer_object extension.

Main driver impacts:
- new code for creating the Mesa GLframebuffer
- new span/pixel read/write code
Some drivers not yet updated/tested.

1 files changed, 39 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/common/drirenderbuffer.h b/src/mesa/drivers/dri/common/drirenderbuffer.h
new file mode 100644
index 0000000000..627f1d41d9
--- /dev/null
+++ b/src/mesa/drivers/dri/common/drirenderbuffer.h
@@ -0,0 +1,39 @@
+
+/**
+ * A driRenderbuffer is dervied from gl_renderbuffer.
+ * It describes a color buffer (front or back), a depth buffer, or stencil
+ * buffer etc.
+ * Specific to DRI drivers are the offset and pitch fields.
+ */
+
+
+#ifndef DRIRENDERBUFFER_H
+#define DRIRENDERBUFFER_H
+
+#include "mtypes.h"
+
+typedef struct {
+   struct gl_renderbuffer Base;
+
+   /* Chars or bytes per pixel.  If Z and Stencil are stored together this
+    * will typically be 32 whether this a depth or stencil renderbuffer.
+    */
+   GLint cpp;
+
+   /* Buffer position and pitch (row stride).  Recall that for today's DRI
+    * drivers, we have statically allocated color/depth/stencil buffers.
+    * So this information describes the whole screen, not just a window.
+    * To address pixels in a window, we need to know the window's position
+    * and size with respect to the screen.
+    */
+   GLint offset;  /* in bytes */
+   GLint pitch;   /* in pixels */
+
+} driRenderbuffer;
+
+
+driRenderbuffer *
+driNewRenderbuffer(GLenum format, GLint cpp, GLint offset, GLint pitch);
+
+
+#endif /* DRIRENDERBUFFER_H */