static WSEGLError allocateBackBuffers(struct wl_egl_display *egldisplay, NativeWindowType nativeWindow)
{
int index;
if (nativeWindow->numFlipBuffers)
{
long stride = 0;
unsigned long flipId = 0;
unsigned long numBuffers;
PVR2DERROR ret = PVR2DCreateFlipChain(egldisplay->context, 0,
//PVR2D_CREATE_FLIPCHAIN_SHARED |
//PVR2D_CREATE_FLIPCHAIN_QUERY,
nativeWindow->numFlipBuffers,
nativeWindow->width,
nativeWindow->height,
wsegl2pvr2dformat(nativeWindow->format),
&stride, &flipId, &(nativeWindow->flipChain));
assert(ret == PVR2D_OK);
PVR2DGetFlipChainBuffers(egldisplay->context,
nativeWindow->flipChain,
&numBuffers,
nativeWindow->flipBuffers);
for (index = 0; index < numBuffers; ++index)
{
nativeWindow->backBuffers[index] = nativeWindow->flipBuffers[index];
}
}
else {
for (index = 0; index < WAYLANDWSEGL_MAX_BACK_BUFFERS; ++index)
{
if (PVR2DMemAlloc(egldisplay->context,
nativeWindow->strideBytes * nativeWindow->height,
128, 0,
&(nativeWindow->backBuffers[index])) != PVR2D_OK)
{
assert(0);
while (--index >= 0)
PVR2DMemFree(egldisplay->context, nativeWindow->backBuffers[index]);
memset(nativeWindow->backBuffers, 0, sizeof(nativeWindow->backBuffers));
nativeWindow->backBuffersValid = 0;
return WSEGL_OUT_OF_MEMORY;
}
}
}
nativeWindow->backBuffersValid = 1;
nativeWindow->currentBackBuffer = 0;
return WSEGL_SUCCESS;
}
int pvrQwsAllocBuffers(PvrQwsDrawable *drawable)
{
int index;
int numBuffers = PVRQWS_MAX_BACK_BUFFERS;
if (drawable->type == PvrQwsPixmap)
numBuffers = 1;
if (drawable->backBuffers[0]) {
if (drawable->backBuffersValid)
return 1;
if (!drawable->usingFlipBuffers) {
for (index = 0; index < numBuffers; ++index)
PVR2DMemFree(pvrQwsDisplay.context, drawable->backBuffers[index]);
}
}
drawable->stridePixels = (drawable->rect.width + 31) & ~31;
drawable->strideBytes =
drawable->stridePixels *
pvrQwsDisplay.screens[drawable->screen].bytesPerPixel;
drawable->usingFlipBuffers =
(pvrQwsDisplay.numFlipBuffers > 0 && drawable->isFullScreen);
if (drawable->usingFlipBuffers) {
if (numBuffers > (int)(pvrQwsDisplay.numFlipBuffers))
numBuffers = pvrQwsDisplay.numFlipBuffers;
for (index = 0; index < numBuffers; ++index)
drawable->backBuffers[index] = pvrQwsDisplay.flipBuffers[index];
} else {
for (index = 0; index < numBuffers; ++index) {
if (PVR2DMemAlloc(pvrQwsDisplay.context,
drawable->strideBytes * drawable->rect.height,
128, 0,
&(drawable->backBuffers[index])) != PVR2D_OK) {
while (--index >= 0)
PVR2DMemFree(pvrQwsDisplay.context, drawable->backBuffers[index]);
memset(drawable->backBuffers, 0, sizeof(drawable->backBuffers));
drawable->backBuffersValid = 0;
return 0;
}
}
}
for (index = numBuffers; index < PVRQWS_MAX_BACK_BUFFERS; ++index) {
drawable->backBuffers[index] = drawable->backBuffers[0];
}
drawable->backBuffersValid = 1;
drawable->currentBackBuffer = 0;
return 1;
}