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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 "main/mtypes.h"
#include "main/formats.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 __DRIdrawable. This is used to compute
* the window's position within the framebuffer.
*/
__DRIdrawable *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 tdfx.
*/
GLboolean backBuffer;
} driRenderbuffer;
extern driRenderbuffer *
driNewRenderbuffer(gl_format format, GLvoid *addr,
GLint cpp, GLint offset, GLint pitch,
__DRIdrawable *dPriv);
extern void
driFlipRenderbuffers(struct gl_framebuffer *fb, GLboolean flipped);
extern void
driUpdateFramebufferSize(struct gl_context *ctx, const __DRIdrawable *dPriv);
#endif /* DRIRENDERBUFFER_H */
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