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DRI2: Add fake front-buffer to request list for windows

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If a front-buffer is requested for a window, add the fake front-buffer
to the list of requested buffers.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
(cherry picked from commit aa2928325f)
This commit is contained in:
Ian Romanick 2009-04-08 15:44:34 -07:00
parent db61eff891
commit 32d250a881
1 changed files with 40 additions and 0 deletions
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40
hw/xfree86/dri2/dri2.c
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@ -139,6 +139,42 @@ DRI2GetBuffers(DrawablePtr pDraw, int *width, int *height,
DRI2ScreenPtr ds = DRI2GetScreen(pDraw->pScreen);
DRI2DrawablePtr pPriv = DRI2GetDrawable(pDraw);
DRI2BufferPtr buffers;
unsigned int temp_buf[32];
unsigned int *temp = temp_buf;
/* If the drawable is a window and the front-buffer is requested, silently
* add the fake front-buffer to the list of requested attachments. The
* counting logic in the loop accounts for the case where the client
* requests both the fake and real front-buffer.
*/
if (pDraw->type == DRAWABLE_WINDOW) {
int need_fake_front = 0;
int i;
if ((count + 1) > 32) {
temp = xalloc((count + 1) * sizeof(temp[0]));
}
for (i = 0; i < count; i++) {
if (attachments[i] == DRI2BufferFrontLeft) {
need_fake_front++;
}
if (attachments[i] == DRI2BufferFakeFrontLeft) {
need_fake_front--;
}
temp[i] = attachments[i];
}
if (need_fake_front > 0) {
temp[i] = DRI2BufferFakeFrontLeft;
count++;
attachments = temp;
}
}
if (pPriv->buffers == NULL ||
pDraw->width != pPriv->width || pDraw->height != pPriv->height)
@ -151,6 +187,10 @@ DRI2GetBuffers(DrawablePtr pDraw, int *width, int *height,
pPriv->height = pDraw->height;
}
if (temp != temp_buf) {
xfree(temp);
}
*width = pPriv->width;
*height = pPriv->height;
*out_count = pPriv->bufferCount;