1 files changed, 78 insertions, 0 deletions
diff --git a/mesalib/src/mesa/drivers/dri/common/drirenderbuffer.h b/mesalib/src/mesa/drivers/dri/common/drirenderbuffer.h
new file mode 100644
index 000000000..cf55286b3
--- /dev/null
+++ b/mesalib/src/mesa/drivers/dri/common/drirenderbuffer.h
@@ -0,0 +1,78 @@
+
+/**
+ * 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 "main/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;
+
+   /**
+    * A handy flag to know if this is the back color buffer.
+    * 
+    * \note
+    * This is currently only used by s3v and tdfx.
+    */
+   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 */