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diff --git a/src/mesa/drivers/dri/common/drirenderbuffer.h b/src/mesa/drivers/dri/common/drirenderbuffer.h
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+
+/**
+ * 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"
+#include "dri_util.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 */
+
+ /* If the driver can do page flipping (full-screen double buffering)
+ * the current front/back buffers may get swapped.
+ * If page flipping is disabled, these fields will be identical to
+ * the offset/pitch/Data above.
+ * If page flipping is enabled, and this is the front(back) renderbuffer,
+ * flippedOffset/Pitch/Data will have the back(front) renderbuffer's values.
+ */
+ GLint flippedOffset;
+ GLint flippedPitch;
+ GLvoid *flippedData; /* mmap'd address of buffer memory, if used */
+
+ /* Pointer to corresponding __DRIdrawablePrivate. This is used to compute
+ * the window's position within the framebuffer.
+ */
+ __DRIdrawablePrivate *dPriv;
+
+ /* XXX this is for radeon/r200 only. We should really create a new
+ * r200Renderbuffer class, derived from this class... not a huge deal.
+ */
+ GLboolean depthHasSurface;
+
+ /* XXX this is for s3v only. A handy flag to know if this is the back
+ * color buffer.
+ */
+ GLboolean backBuffer;
+} driRenderbuffer;
+
+
+extern driRenderbuffer *
+driNewRenderbuffer(GLenum format, GLvoid *addr,
+ GLint cpp, GLint offset, GLint pitch,
+ __DRIdrawablePrivate *dPriv);
+
+extern void
+driFlipRenderbuffers(struct gl_framebuffer *fb, GLboolean flipped);
+
+
+extern void
+driUpdateFramebufferSize(GLcontext *ctx, const __DRIdrawablePrivate *dPriv);
+
+
+#endif /* DRIRENDERBUFFER_H */