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#include "Test.h"
#include "SkMallocPixelRef.h"
#include "SkPixelRef.h"
class TestListener : public SkPixelRef::GenIDChangeListener {
public:
explicit TestListener(int* ptr) : fPtr(ptr) {}
void onChange() SK_OVERRIDE { (*fPtr)++; }
private:
int* fPtr;
};
DEF_TEST(PixelRef_GenIDChange, r) {
SkImageInfo info = SkImageInfo::MakeN32Premul(10, 10);
SkAutoTUnref<SkPixelRef> pixelRef(SkMallocPixelRef::NewAllocate(info, 0, NULL));
// Register a listener.
int count = 0;
pixelRef->addGenIDChangeListener(SkNEW_ARGS(TestListener, (&count)));
REPORTER_ASSERT(r, 0 == count);
// No one has looked at our pixelRef's generation ID, so invalidating it doesn't make sense.
// (An SkPixelRef tree falls in the forest but there's nobody around to hear it. Do we care?)
pixelRef->notifyPixelsChanged();
REPORTER_ASSERT(r, 0 == count);
// Force the generation ID to be calculated.
REPORTER_ASSERT(r, 0 != pixelRef->getGenerationID());
// Our listener was dropped in the first call to notifyPixelsChanged(). This is a no-op.
pixelRef->notifyPixelsChanged();
REPORTER_ASSERT(r, 0 == count);
// Force the generation ID to be recalculated, then add a listener.
REPORTER_ASSERT(r, 0 != pixelRef->getGenerationID());
pixelRef->addGenIDChangeListener(SkNEW_ARGS(TestListener, (&count)));
pixelRef->notifyPixelsChanged();
REPORTER_ASSERT(r, 1 == count);
// Quick check that NULL is safe.
REPORTER_ASSERT(r, 0 != pixelRef->getGenerationID());
pixelRef->addGenIDChangeListener(NULL);
pixelRef->notifyPixelsChanged();
}
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