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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 "SkBitmap.h"
#include "SkBitmapDevice.h"
#include "SkCanvas.h"
#include "SkDraw.h"
#include "SkLayerDrawLooper.h"
#include "SkMatrix.h"
#include "SkPaint.h"
#include "SkRect.h"
#include "SkRefCnt.h"
#include "SkScalar.h"
#include "SkSmallAllocator.h"
#include "SkXfermode.h"
#include "Test.h"
static SkBitmap make_bm(int w, int h) {
SkBitmap bm;
bm.allocN32Pixels(w, h);
return bm;
}
// TODO: can this be derived from SkBaseDevice?
class FakeDevice : public SkBitmapDevice {
public:
FakeDevice() : INHERITED(make_bm(100, 100), SkSurfaceProps(0, kUnknown_SkPixelGeometry)) {
}
void drawRect(const SkDraw& draw, const SkRect& r, const SkPaint& paint) override {
fLastMatrix = *draw.fMatrix;
this->INHERITED::drawRect(draw, r, paint);
}
SkMatrix fLastMatrix;
private:
typedef SkBitmapDevice INHERITED;
};
static void test_frontToBack(skiatest::Reporter* reporter) {
SkLayerDrawLooper::Builder looperBuilder;
SkLayerDrawLooper::LayerInfo layerInfo;
// Add the front layer, with the defaults.
(void)looperBuilder.addLayer(layerInfo);
// Add the back layer, with some layer info set.
layerInfo.fOffset.set(10.0f, 20.0f);
layerInfo.fPaintBits |= SkLayerDrawLooper::kXfermode_Bit;
SkPaint* layerPaint = looperBuilder.addLayer(layerInfo);
layerPaint->setXfermodeMode(SkXfermode::kSrc_Mode);
FakeDevice device;
SkCanvas canvas(&device);
SkPaint paint;
SkAutoTUnref<SkLayerDrawLooper> looper(looperBuilder.detachLooper());
SkSmallAllocator<1, 32> allocator;
void* buffer = allocator.reserveT<SkDrawLooper::Context>(looper->contextSize());
SkDrawLooper::Context* context = looper->createContext(&canvas, buffer);
// The back layer should come first.
REPORTER_ASSERT(reporter, context->next(&canvas, &paint));
REPORTER_ASSERT(reporter, SkXfermode::IsMode(paint.getXfermode(), SkXfermode::kSrc_Mode));
canvas.drawRect(SkRect::MakeWH(50.0f, 50.0f), paint);
REPORTER_ASSERT(reporter, 10.0f == device.fLastMatrix.getTranslateX());
REPORTER_ASSERT(reporter, 20.0f == device.fLastMatrix.getTranslateY());
paint.reset();
// Then the front layer.
REPORTER_ASSERT(reporter, context->next(&canvas, &paint));
REPORTER_ASSERT(reporter, SkXfermode::IsMode(paint.getXfermode(), SkXfermode::kSrcOver_Mode));
canvas.drawRect(SkRect::MakeWH(50.0f, 50.0f), paint);
REPORTER_ASSERT(reporter, 0.0f == device.fLastMatrix.getTranslateX());
REPORTER_ASSERT(reporter, 0.0f == device.fLastMatrix.getTranslateY());
// Only two layers were added, so that should be the end.
REPORTER_ASSERT(reporter, !context->next(&canvas, &paint));
}
static void test_backToFront(skiatest::Reporter* reporter) {
SkLayerDrawLooper::Builder looperBuilder;
SkLayerDrawLooper::LayerInfo layerInfo;
// Add the back layer, with the defaults.
(void)looperBuilder.addLayerOnTop(layerInfo);
// Add the front layer, with some layer info set.
layerInfo.fOffset.set(10.0f, 20.0f);
layerInfo.fPaintBits |= SkLayerDrawLooper::kXfermode_Bit;
SkPaint* layerPaint = looperBuilder.addLayerOnTop(layerInfo);
layerPaint->setXfermodeMode(SkXfermode::kSrc_Mode);
FakeDevice device;
SkCanvas canvas(&device);
SkPaint paint;
SkAutoTUnref<SkLayerDrawLooper> looper(looperBuilder.detachLooper());
SkSmallAllocator<1, 32> allocator;
void* buffer = allocator.reserveT<SkDrawLooper::Context>(looper->contextSize());
SkDrawLooper::Context* context = looper->createContext(&canvas, buffer);
// The back layer should come first.
REPORTER_ASSERT(reporter, context->next(&canvas, &paint));
REPORTER_ASSERT(reporter, SkXfermode::IsMode(paint.getXfermode(), SkXfermode::kSrcOver_Mode));
canvas.drawRect(SkRect::MakeWH(50.0f, 50.0f), paint);
REPORTER_ASSERT(reporter, 0.0f == device.fLastMatrix.getTranslateX());
REPORTER_ASSERT(reporter, 0.0f == device.fLastMatrix.getTranslateY());
paint.reset();
// Then the front layer.
REPORTER_ASSERT(reporter, context->next(&canvas, &paint));
REPORTER_ASSERT(reporter, SkXfermode::IsMode(paint.getXfermode(), SkXfermode::kSrc_Mode));
canvas.drawRect(SkRect::MakeWH(50.0f, 50.0f), paint);
REPORTER_ASSERT(reporter, 10.0f == device.fLastMatrix.getTranslateX());
REPORTER_ASSERT(reporter, 20.0f == device.fLastMatrix.getTranslateY());
// Only two layers were added, so that should be the end.
REPORTER_ASSERT(reporter, !context->next(&canvas, &paint));
}
static void test_mixed(skiatest::Reporter* reporter) {
SkLayerDrawLooper::Builder looperBuilder;
SkLayerDrawLooper::LayerInfo layerInfo;
// Add the back layer, with the defaults.
(void)looperBuilder.addLayer(layerInfo);
// Add the front layer, with some layer info set.
layerInfo.fOffset.set(10.0f, 20.0f);
layerInfo.fPaintBits |= SkLayerDrawLooper::kXfermode_Bit;
SkPaint* layerPaint = looperBuilder.addLayerOnTop(layerInfo);
layerPaint->setXfermodeMode(SkXfermode::kSrc_Mode);
FakeDevice device;
SkCanvas canvas(&device);
SkPaint paint;
SkAutoTUnref<SkLayerDrawLooper> looper(looperBuilder.detachLooper());
SkSmallAllocator<1, 32> allocator;
void* buffer = allocator.reserveT<SkDrawLooper::Context>(looper->contextSize());
SkDrawLooper::Context* context = looper->createContext(&canvas, buffer);
// The back layer should come first.
REPORTER_ASSERT(reporter, context->next(&canvas, &paint));
REPORTER_ASSERT(reporter, SkXfermode::IsMode(paint.getXfermode(), SkXfermode::kSrcOver_Mode));
canvas.drawRect(SkRect::MakeWH(50.0f, 50.0f), paint);
REPORTER_ASSERT(reporter, 0.0f == device.fLastMatrix.getTranslateX());
REPORTER_ASSERT(reporter, 0.0f == device.fLastMatrix.getTranslateY());
paint.reset();
// Then the front layer.
REPORTER_ASSERT(reporter, context->next(&canvas, &paint));
REPORTER_ASSERT(reporter, SkXfermode::IsMode(paint.getXfermode(), SkXfermode::kSrc_Mode));
canvas.drawRect(SkRect::MakeWH(50.0f, 50.0f), paint);
REPORTER_ASSERT(reporter, 10.0f == device.fLastMatrix.getTranslateX());
REPORTER_ASSERT(reporter, 20.0f == device.fLastMatrix.getTranslateY());
// Only two layers were added, so that should be the end.
REPORTER_ASSERT(reporter, !context->next(&canvas, &paint));
}
DEF_TEST(LayerDrawLooper, reporter) {
test_frontToBack(reporter);
test_backToFront(reporter);
test_mixed(reporter);
}
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