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/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "Test.h"
#include "SkBitmap.h"
#include "SkCanvas.h"
#include "SkDraw.h"
#include "SkDevice.h"
#include "SkLayerDrawLooper.h"
#include "SkMatrix.h"
#include "SkPaint.h"
#include "SkRect.h"
#include "SkRefCnt.h"
#include "SkScalar.h"
#include "SkXfermode.h"
namespace {
class FakeDevice : public SkDevice {
public:
FakeDevice() : SkDevice(SkBitmap::kARGB_8888_Config, 100, 100) { }
virtual void drawRect(const SkDraw& draw, const SkRect& r,
const SkPaint& paint) SK_OVERRIDE {
fLastMatrix = *draw.fMatrix;
SkDevice::drawRect(draw, r, paint);
}
SkMatrix fLastMatrix;
};
} // namespace
static void test_frontToBack(skiatest::Reporter* reporter) {
SkAutoTUnref<SkLayerDrawLooper> looper(SkNEW(SkLayerDrawLooper));
SkLayerDrawLooper::LayerInfo layerInfo;
// Add the front layer, with the defaults.
(void)looper->addLayer(layerInfo);
// Add the back layer, with some layer info set.
layerInfo.fOffset.set(SkFloatToScalar(10.0f), SkFloatToScalar(20.0f));
layerInfo.fPaintBits |= SkLayerDrawLooper::kXfermode_Bit;
SkPaint* layerPaint = looper->addLayer(layerInfo);
layerPaint->setXfermodeMode(SkXfermode::kSrc_Mode);
FakeDevice device;
SkCanvas canvas(&device);
SkPaint paint;
looper->init(&canvas);
// The back layer should come first.
REPORTER_ASSERT(reporter, looper->next(&canvas, &paint));
REPORTER_ASSERT(reporter, SkXfermode::IsMode(paint.getXfermode(), SkXfermode::kSrc_Mode));
canvas.drawRect(SkRect::MakeWH(SkFloatToScalar(50.0f), SkFloatToScalar(50.0f)), paint);
REPORTER_ASSERT(reporter, SkFloatToScalar(10.0f) == device.fLastMatrix.getTranslateX());
REPORTER_ASSERT(reporter, SkFloatToScalar(20.0f) == device.fLastMatrix.getTranslateY());
paint.reset();
// Then the front layer.
REPORTER_ASSERT(reporter, looper->next(&canvas, &paint));
REPORTER_ASSERT(reporter, SkXfermode::IsMode(paint.getXfermode(), SkXfermode::kSrcOver_Mode));
canvas.drawRect(SkRect::MakeWH(SkFloatToScalar(50.0f), SkFloatToScalar(50.0f)), paint);
REPORTER_ASSERT(reporter, SkFloatToScalar(0.0f) == device.fLastMatrix.getTranslateX());
REPORTER_ASSERT(reporter, SkFloatToScalar(0.0f) == device.fLastMatrix.getTranslateY());
// Only two layers were added, so that should be the end.
REPORTER_ASSERT(reporter, !looper->next(&canvas, &paint));
}
static void test_backToFront(skiatest::Reporter* reporter) {
SkAutoTUnref<SkLayerDrawLooper> looper(SkNEW(SkLayerDrawLooper));
SkLayerDrawLooper::LayerInfo layerInfo;
// Add the back layer, with the defaults.
(void)looper->addLayerOnTop(layerInfo);
// Add the front layer, with some layer info set.
layerInfo.fOffset.set(SkFloatToScalar(10.0f), SkFloatToScalar(20.0f));
layerInfo.fPaintBits |= SkLayerDrawLooper::kXfermode_Bit;
SkPaint* layerPaint = looper->addLayerOnTop(layerInfo);
layerPaint->setXfermodeMode(SkXfermode::kSrc_Mode);
FakeDevice device;
SkCanvas canvas(&device);
SkPaint paint;
looper->init(&canvas);
// The back layer should come first.
REPORTER_ASSERT(reporter, looper->next(&canvas, &paint));
REPORTER_ASSERT(reporter, SkXfermode::IsMode(paint.getXfermode(), SkXfermode::kSrcOver_Mode));
canvas.drawRect(SkRect::MakeWH(SkFloatToScalar(50.0f), SkFloatToScalar(50.0f)), paint);
REPORTER_ASSERT(reporter, SkFloatToScalar(0.0f) == device.fLastMatrix.getTranslateX());
REPORTER_ASSERT(reporter, SkFloatToScalar(0.0f) == device.fLastMatrix.getTranslateY());
paint.reset();
// Then the front layer.
REPORTER_ASSERT(reporter, looper->next(&canvas, &paint));
REPORTER_ASSERT(reporter, SkXfermode::IsMode(paint.getXfermode(), SkXfermode::kSrc_Mode));
canvas.drawRect(SkRect::MakeWH(SkFloatToScalar(50.0f), SkFloatToScalar(50.0f)), paint);
REPORTER_ASSERT(reporter, SkFloatToScalar(10.0f) == device.fLastMatrix.getTranslateX());
REPORTER_ASSERT(reporter, SkFloatToScalar(20.0f) == device.fLastMatrix.getTranslateY());
// Only two layers were added, so that should be the end.
REPORTER_ASSERT(reporter, !looper->next(&canvas, &paint));
}
static void test_mixed(skiatest::Reporter* reporter) {
SkAutoTUnref<SkLayerDrawLooper> looper(SkNEW(SkLayerDrawLooper));
SkLayerDrawLooper::LayerInfo layerInfo;
// Add the back layer, with the defaults.
(void)looper->addLayer(layerInfo);
// Add the front layer, with some layer info set.
layerInfo.fOffset.set(SkFloatToScalar(10.0f), SkFloatToScalar(20.0f));
layerInfo.fPaintBits |= SkLayerDrawLooper::kXfermode_Bit;
SkPaint* layerPaint = looper->addLayerOnTop(layerInfo);
layerPaint->setXfermodeMode(SkXfermode::kSrc_Mode);
FakeDevice device;
SkCanvas canvas(&device);
SkPaint paint;
looper->init(&canvas);
// The back layer should come first.
REPORTER_ASSERT(reporter, looper->next(&canvas, &paint));
REPORTER_ASSERT(reporter, SkXfermode::IsMode(paint.getXfermode(), SkXfermode::kSrcOver_Mode));
canvas.drawRect(SkRect::MakeWH(SkFloatToScalar(50.0f), SkFloatToScalar(50.0f)), paint);
REPORTER_ASSERT(reporter, SkFloatToScalar(0.0f) == device.fLastMatrix.getTranslateX());
REPORTER_ASSERT(reporter, SkFloatToScalar(0.0f) == device.fLastMatrix.getTranslateY());
paint.reset();
// Then the front layer.
REPORTER_ASSERT(reporter, looper->next(&canvas, &paint));
REPORTER_ASSERT(reporter, SkXfermode::IsMode(paint.getXfermode(), SkXfermode::kSrc_Mode));
canvas.drawRect(SkRect::MakeWH(SkFloatToScalar(50.0f), SkFloatToScalar(50.0f)), paint);
REPORTER_ASSERT(reporter, SkFloatToScalar(10.0f) == device.fLastMatrix.getTranslateX());
REPORTER_ASSERT(reporter, SkFloatToScalar(20.0f) == device.fLastMatrix.getTranslateY());
// Only two layers were added, so that should be the end.
REPORTER_ASSERT(reporter, !looper->next(&canvas, &paint));
}
static void TestLayerDrawLooper(skiatest::Reporter* reporter) {
test_frontToBack(reporter);
test_backToFront(reporter);
test_mixed(reporter);
}
#include "TestClassDef.h"
DEFINE_TESTCLASS("LayerDrawLooper", TestLayerDrawLooperClass, TestLayerDrawLooper)
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