void SkPixelRef::setPreLocked(void* pixels, size_t rowBytes, SkColorTable* ctable) {
SkASSERT(pixels);
validate_pixels_ctable(fInfo, ctable);
// only call me in your constructor, otherwise fLockCount tracking can get
// out of sync.
fRec.fPixels = pixels;
fRec.fColorTable = ctable;
fRec.fRowBytes = rowBytes;
fLockCount = SKPIXELREF_PRELOCKED_LOCKCOUNT;
fPreLocked = true;
}
// Increments fLockCount only on success
bool SkPixelRef::lockPixelsInsideMutex() {
fMutex->assertHeld();
if (1 == ++fLockCount) {
SkASSERT(fRec.isZero());
if (!this->onNewLockPixels(&fRec)) {
fRec.zero();
fLockCount -= 1; // we return fLockCount unchanged if we fail.
return false;
}
}
validate_pixels_ctable(fInfo, fRec.fPixels, fRec.fColorTable);
return fRec.fPixels != NULL;
}