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added flippedData field for page flipping, code to flip stereo color buffers

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This commit is contained in:
Brian Paul 2005-09-03 16:42:19 +00:00
parent c6262cd8c5
commit e6925b51e1
2 changed files with 52 additions and 26 deletions
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66
src/mesa/drivers/dri/common/drirenderbuffer.c
View file

@ -22,6 +22,16 @@ driRenderbufferStorage(GLcontext *ctx, struct gl_renderbuffer *rb,
}
static void
driDeleteRenderbuffer(struct gl_renderbuffer *rb)
{
/* don't free rb->Data Chances are it's a memory mapped region for
* the dri drivers.
*/
_mesa_free(rb);
}
/**
* Allocate a new driRenderbuffer object.
* Individual drivers are free to implement different versions of
@ -86,8 +96,7 @@ driNewRenderbuffer(GLenum format, GLint cpp, GLint offset, GLint pitch)
*/
drb->Base.AllocStorage = driRenderbufferStorage;
/* using default Delete function */
drb->Base.Delete = driDeleteRenderbuffer;
/* DRI renderbuffer-specific fields: */
drb->offset = offset;
@ -103,32 +112,43 @@ driNewRenderbuffer(GLenum format, GLint cpp, GLint offset, GLint pitch)
/**
* Update the front and back renderbuffers' flippedPitch/Offset fields.
* Update the front and back renderbuffers' flippedPitch/Offset/Data fields.
* If stereo, flip both the left and right pairs.
* This is used when we do double buffering via page flipping.
* \param fb the framebuffer we're page flipping
* \param flipped if true, set flipped values, else set non-flipped values
*/
void
driFlipRenderbuffers(struct gl_framebuffer *fb, GLenum flipped)
driFlipRenderbuffers(struct gl_framebuffer *fb, GLboolean flipped)
{
driRenderbuffer *front_drb
= (driRenderbuffer *) fb->Attachment[BUFFER_FRONT_LEFT].Renderbuffer;
driRenderbuffer *back_drb
= (driRenderbuffer *) fb->Attachment[BUFFER_BACK_LEFT].Renderbuffer;
const GLuint count = fb->Visual.stereoMode ? 2 : 1;
GLuint lr; /* left or right */
/* If this fails, it means we're trying to do page flipping for a
* single-buffered window!
*/
assert(back_drb);
ASSERT(fb->Visual.doubleBufferMode);
if (flipped) {
front_drb->flippedOffset = back_drb->offset;
front_drb->flippedPitch = back_drb->pitch;
back_drb->flippedOffset = front_drb->offset;
back_drb->flippedPitch = front_drb->pitch;
}
else {
front_drb->flippedOffset = front_drb->offset;
front_drb->flippedPitch = front_drb->pitch;
back_drb->flippedOffset = back_drb->offset;
back_drb->flippedPitch = back_drb->pitch;
for (lr = 0; lr < count; lr++) {
GLuint frontBuf = (lr == 0) ? BUFFER_FRONT_LEFT : BUFFER_FRONT_RIGHT;
GLuint backBuf = (lr == 0) ? BUFFER_BACK_LEFT : BUFFER_BACK_RIGHT;
driRenderbuffer *front_drb
= (driRenderbuffer *) fb->Attachment[frontBuf].Renderbuffer;
driRenderbuffer *back_drb
= (driRenderbuffer *) fb->Attachment[backBuf].Renderbuffer;
if (flipped) {
front_drb->flippedOffset = back_drb->offset;
front_drb->flippedPitch = back_drb->pitch;
front_drb->flippedData = back_drb->Base.Data;
back_drb->flippedOffset = front_drb->offset;
back_drb->flippedPitch = front_drb->pitch;
back_drb->flippedData = front_drb->Base.Data;
}
else {
front_drb->flippedOffset = front_drb->offset;
front_drb->flippedPitch = front_drb->pitch;
front_drb->flippedData = front_drb->Base.Data;
back_drb->flippedOffset = back_drb->offset;
back_drb->flippedPitch = back_drb->pitch;
back_drb->flippedData = back_drb->Base.Data;
}
}
}

12
src/mesa/drivers/dri/common/drirenderbuffer.h
View file

@ -32,17 +32,23 @@ typedef struct {
/* 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 above.
* the offset/pitch/Data above.
* If page flipping is enabled, and this is the front(back) renderbuffer,
* flippedOffset/Pitch will have the back(front) renderbuffer's values.
* flippedOffset/Pitch/Data will have the back(front) renderbuffer's values.
*/
GLint flippedOffset;
GLint flippedPitch;
GLubyte *flippedData; /* mmap'd memory, if used */
/* 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;
@ -50,6 +56,6 @@ extern driRenderbuffer *
driNewRenderbuffer(GLenum format, GLint cpp, GLint offset, GLint pitch);
extern void
driFlipRenderbuffers(struct gl_framebuffer *fb, GLenum flipped);
driFlipRenderbuffers(struct gl_framebuffer *fb, GLboolean flipped);
#endif /* DRIRENDERBUFFER_H */