3 * A driRenderbuffer is dervied from gl_renderbuffer.
4 * It describes a color buffer (front or back), a depth buffer, or stencil
6 * Specific to DRI drivers are the offset and pitch fields.
10 #ifndef DRIRENDERBUFFER_H
11 #define DRIRENDERBUFFER_H
13 #include "main/mtypes.h"
14 #include "main/formats.h"
19 struct gl_renderbuffer Base;
21 /* Chars or bytes per pixel. If Z and Stencil are stored together this
22 * will typically be 32 whether this a depth or stencil renderbuffer.
26 /* Buffer position and pitch (row stride). Recall that for today's DRI
27 * drivers, we have statically allocated color/depth/stencil buffers.
28 * So this information describes the whole screen, not just a window.
29 * To address pixels in a window, we need to know the window's position
30 * and size with respect to the screen.
32 GLint offset; /* in bytes */
33 GLint pitch; /* in pixels */
35 /* If the driver can do page flipping (full-screen double buffering)
36 * the current front/back buffers may get swapped.
37 * If page flipping is disabled, these fields will be identical to
38 * the offset/pitch/Data above.
39 * If page flipping is enabled, and this is the front(back) renderbuffer,
40 * flippedOffset/Pitch/Data will have the back(front) renderbuffer's values.
44 GLvoid *flippedData; /* mmap'd address of buffer memory, if used */
46 /* Pointer to corresponding __DRIdrawable. This is used to compute
47 * the window's position within the framebuffer.
51 /* XXX this is for radeon/r200 only. We should really create a new
52 * r200Renderbuffer class, derived from this class... not a huge deal.
54 GLboolean depthHasSurface;
57 * A handy flag to know if this is the back color buffer.
60 * This is currently only used by tdfx.
66 extern driRenderbuffer *
67 driNewRenderbuffer(gl_format format, GLvoid *addr,
68 GLint cpp, GLint offset, GLint pitch,
69 __DRIdrawable *dPriv);
72 driFlipRenderbuffers(struct gl_framebuffer *fb, GLboolean flipped);
76 driUpdateFramebufferSize(struct gl_context *ctx, const __DRIdrawable *dPriv);
79 #endif /* DRIRENDERBUFFER_H */