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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 "gm.h"
#include "SkAlphaThresholdFilter.h"
#include "SkRandom.h"
#include "SkSurface.h"
#define WIDTH 500
#define HEIGHT 500
namespace {
void draw_rects(SkCanvas* canvas) {
SkPaint rectPaint;
rectPaint.setColor(0xFF0000FF);
canvas->drawRect(SkRect::MakeXYWH(0, 0, WIDTH / 2, HEIGHT / 2), rectPaint);
rectPaint.setColor(0xBFFF0000);
canvas->drawRect(SkRect::MakeXYWH(WIDTH / 2, 0, WIDTH / 2, HEIGHT / 2), rectPaint);
rectPaint.setColor(0x3F00FF00);
canvas->drawRect(SkRect::MakeXYWH(0, HEIGHT / 2, WIDTH / 2, HEIGHT / 2), rectPaint);
rectPaint.setColor(0x00000000);
canvas->drawRect(SkRect::MakeXYWH(WIDTH / 2, HEIGHT / 2, WIDTH / 2, HEIGHT / 2), rectPaint);
}
SkPaint create_filter_paint() {
SkIRect rects[2];
rects[0] = SkIRect::MakeXYWH(0, 150, WIDTH, HEIGHT - 300);
rects[1] = SkIRect::MakeXYWH(150, 0, WIDTH - 300, HEIGHT);
SkRegion region;
region.setRects(rects, 2);
SkPaint paint;
paint.setImageFilter(SkAlphaThresholdFilter::Create(region, 0.2f, 0.7f))->unref();
return paint;
}
};
namespace skiagm {
class ImageAlphaThresholdGM : public GM {
public:
ImageAlphaThresholdGM() {
this->setBGColor(0xFFFFFFFF);
}
protected:
SkString onShortName() override {
return SkString("imagealphathreshold");
}
SkISize onISize() override {
return SkISize::Make(WIDTH, HEIGHT);
}
void onDraw(SkCanvas* canvas) override {
SkMatrix matrix;
matrix.reset();
matrix.setTranslate(WIDTH * .1f, HEIGHT * .1f);
matrix.postScale(.8f, .8f);
canvas->concat(matrix);
SkPaint paint = create_filter_paint();
canvas->saveLayer(nullptr, &paint);
draw_rects(canvas);
canvas->restore();
}
private:
typedef GM INHERITED;
};
class ImageAlphaThresholdSurfaceGM : public GM {
public:
ImageAlphaThresholdSurfaceGM() {
this->setBGColor(0xFFFFFFFF);
}
protected:
SkString onShortName() override {
return SkString("imagealphathreshold_surface");
}
SkISize onISize() override {
return SkISize::Make(WIDTH, HEIGHT);
}
void onDraw(SkCanvas* canvas) override {
SkImageInfo info = SkImageInfo::MakeN32(WIDTH, HEIGHT, kOpaque_SkAlphaType);
SkAutoTUnref<SkSurface> surface(canvas->newSurface(info));
if (nullptr == surface) {
surface.reset(SkSurface::NewRaster(info));
}
surface->getCanvas()->clear(SK_ColorWHITE);
draw_rects(surface->getCanvas());
SkAutoTUnref<SkImage> image(surface->newImageSnapshot());
SkPaint paint = create_filter_paint();
canvas->clipRect(SkRect::MakeLTRB(100, 100, WIDTH - 100, HEIGHT - 100));
canvas->drawImage(image, 0, 0, &paint);
}
private:
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
DEF_GM(return new ImageAlphaThresholdGM();)
DEF_GM(return new ImageAlphaThresholdSurfaceGM();)
}
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