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/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkCanvas.h"
#include "SkDrawLooper.h"
#include "SkTypes.h"
#include "Test.h"
/*
* Subclass of looper that just draws once, with an offset in X.
*/
class TestLooper : public SkDrawLooper {
public:
virtual SkDrawLooper::Context* createContext(SkCanvas*, void* storage) const SK_OVERRIDE {
return SkNEW_PLACEMENT(storage, TestDrawLooperContext);
}
virtual size_t contextSize() const SK_OVERRIDE { return sizeof(TestDrawLooperContext); }
#ifndef SK_IGNORE_TO_STRING
virtual void toString(SkString* str) const SK_OVERRIDE {
str->append("TestLooper:");
}
#endif
private:
class TestDrawLooperContext : public SkDrawLooper::Context {
public:
TestDrawLooperContext() : fOnce(true) {}
virtual ~TestDrawLooperContext() {}
virtual bool next(SkCanvas* canvas, SkPaint*) SK_OVERRIDE {
if (fOnce) {
fOnce = false;
canvas->translate(SkIntToScalar(10), 0);
return true;
}
return false;
}
private:
bool fOnce;
};
SK_DECLARE_UNFLATTENABLE_OBJECT()
};
static void test_drawBitmap(skiatest::Reporter* reporter) {
SkBitmap src;
src.allocN32Pixels(10, 10);
src.eraseColor(SK_ColorWHITE);
SkBitmap dst;
dst.allocN32Pixels(10, 10);
dst.eraseColor(SK_ColorTRANSPARENT);
SkCanvas canvas(dst);
SkPaint paint;
// we are initially transparent
REPORTER_ASSERT(reporter, 0 == *dst.getAddr32(5, 5));
// we see the bitmap drawn
canvas.drawBitmap(src, 0, 0, &paint);
REPORTER_ASSERT(reporter, 0xFFFFFFFF == *dst.getAddr32(5, 5));
// reverify we are clear again
dst.eraseColor(SK_ColorTRANSPARENT);
REPORTER_ASSERT(reporter, 0 == *dst.getAddr32(5, 5));
// if the bitmap is clipped out, we don't draw it
canvas.drawBitmap(src, SkIntToScalar(-10), 0, &paint);
REPORTER_ASSERT(reporter, 0 == *dst.getAddr32(5, 5));
// now install our looper, which will draw, since it internally translates
// to the left. The test is to ensure that canvas' quickReject machinary
// allows us through, even though sans-looper we would look like we should
// be clipped out.
paint.setLooper(new TestLooper)->unref();
canvas.drawBitmap(src, SkIntToScalar(-10), 0, &paint);
REPORTER_ASSERT(reporter, 0xFFFFFFFF == *dst.getAddr32(5, 5));
}
DEF_TEST(QuickReject, reporter) {
test_drawBitmap(reporter);
}
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