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;
}
/* Called when a new drawable is added to ensure that we have a
PVR2D context and framebuffer PVR2DMEMINFO blocks */
static int pvrQwsAddDrawable(void)
{
int numDevs, screen;
PVR2DDEVICEINFO *devs;
unsigned long devId;
unsigned long pageAddresses[2];
PVR2DMEMINFO *memInfo;
PVR2DDISPLAYINFO displayInfo;
/* Bail out early if this is not the first drawable */
if (pvrQwsDisplay.numDrawables > 0) {
++(pvrQwsDisplay.numDrawables);
return 1;
}
/* Find the first PVR2D device in the system and open it */
numDevs = PVR2DEnumerateDevices(0);
if (numDevs <= 0)
return 0;
devs = (PVR2DDEVICEINFO *)malloc(sizeof(PVR2DDEVICEINFO) * numDevs);
if (!devs)
return 0;
if (PVR2DEnumerateDevices(devs) != PVR2D_OK) {
free(devs);
return 0;
}
devId = devs[0].ulDevID;
free(devs);
if (PVR2DCreateDeviceContext(devId, &pvrQwsDisplay.context, 0) != PVR2D_OK)
return 0;
pvrQwsDisplay.numFlipBuffers = 0;
pvrQwsDisplay.flipChain = 0;
if (PVR2DGetDeviceInfo(pvrQwsDisplay.context, &displayInfo) == PVR2D_OK) {
if (displayInfo.ulMaxFlipChains > 0 && displayInfo.ulMaxBuffersInChain > 0)
pvrQwsDisplay.numFlipBuffers = displayInfo.ulMaxBuffersInChain;
if (pvrQwsDisplay.numFlipBuffers > PVRQWS_MAX_FLIP_BUFFERS)
pvrQwsDisplay.numFlipBuffers = PVRQWS_MAX_FLIP_BUFFERS;
}
/* Create the PVR2DMEMINFO blocks for the active framebuffers */
for (screen = 0; screen < PVRQWS_MAX_SCREENS; ++screen) {
if (screen != 0 && pvrQwsDisplay.screens[screen].mapped) {
pageAddresses[0]
= pvrQwsDisplay.screens[screen].screenStart & 0xFFFFF000;
pageAddresses[1] = 0;
if (PVR2DMemWrap
(pvrQwsDisplay.context,
pvrQwsDisplay.screens[screen].mapped,
PVR2D_WRAPFLAG_CONTIGUOUS,
pvrQwsDisplay.screens[screen].mappedLength,
pageAddresses, &memInfo) != PVR2D_OK) {
PVR2DDestroyDeviceContext(pvrQwsDisplay.context);
pvrQwsDisplay.context = 0;
return 0;
}
pvrQwsDisplay.screens[screen].frameBuffer = memInfo;
} else if (screen == 0) {
if (PVR2DGetFrameBuffer
(pvrQwsDisplay.context,
PVR2D_FB_PRIMARY_SURFACE, &memInfo) != PVR2D_OK) {
fprintf(stderr, "QWSWSEGL: could not get the primary framebuffer surface\n");
PVR2DDestroyDeviceContext(pvrQwsDisplay.context);
pvrQwsDisplay.context = 0;
return 0;
}
pvrQwsDisplay.screens[screen].frameBuffer = memInfo;
pvrQwsDisplay.screens[screen].mapped = memInfo->pBase;
}
}
/* Create a flip chain for the screen if supported by the hardware */
pvrQwsDisplay.usePresentBlit = 0;
if (pvrQwsDisplay.numFlipBuffers > 0) {
long stride = 0;
unsigned long flipId = 0;
unsigned long numBuffers;
if (PVR2DCreateFlipChain(pvrQwsDisplay.context, 0,
//PVR2D_CREATE_FLIPCHAIN_SHARED |
//PVR2D_CREATE_FLIPCHAIN_QUERY,
pvrQwsDisplay.numFlipBuffers,
pvrQwsDisplay.screens[0].screenRect.width,
pvrQwsDisplay.screens[0].screenRect.height,
pvrQwsDisplay.screens[0].pixelFormat,
&stride, &flipId, &(pvrQwsDisplay.flipChain))
== PVR2D_OK) {
pvrQwsDisplay.screens[0].screenStride = stride;
PVR2DGetFlipChainBuffers(pvrQwsDisplay.context,
pvrQwsDisplay.flipChain,
&numBuffers,
pvrQwsDisplay.flipBuffers);
} else {
pvrQwsDisplay.flipChain = 0;
pvrQwsDisplay.numFlipBuffers = 0;
}
/* PVR2DPresentBlt is a little more reliable than PVR2DBlt
when flip chains are present, even if we cannot create a
flip chain at the moment */
pvrQwsDisplay.usePresentBlit = 1;
}
/* The context is ready to go */
++(pvrQwsDisplay.numDrawables);
return 1;
}