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/*
* Copyright 2014 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 "SkCanvas.h"
#include "SkColorFilter.h"
#include "SkColorPriv.h"
#include "SkShader.h"
#include "SkBlurImageFilter.h"
#include "SkColorMatrixFilter.h"
#include "SkDisplacementMapEffect.h"
#include "SkDropShadowImageFilter.h"
#include "SkGradientShader.h"
#include "SkImageSource.h"
#include "SkMorphologyImageFilter.h"
#include "SkColorFilterImageFilter.h"
#include "SkMergeImageFilter.h"
#include "SkOffsetImageFilter.h"
#include "SkSurface.h"
///////////////////////////////////////////////////////////////////////////////
class ImageFiltersCropExpandGM : public skiagm::GM {
public:
ImageFiltersCropExpandGM () {}
protected:
SkString onShortName() override {
return SkString("imagefilterscropexpand");
}
SkISize onISize() override { return SkISize::Make(570, 650); }
void onDraw(SkCanvas* canvas) override {
SkAutoTUnref<SkColorFilter> cf(
SkColorFilter::CreateModeFilter(SK_ColorBLUE, SkXfermode::kSrcIn_Mode));
SkImageFilter::CropRect cropRect(
SkRect::Make(SkIRect::MakeXYWH(10, 10, 44, 44)),
SkImageFilter::CropRect::kHasAll_CropEdge);
SkAutoTUnref<SkImage> gradientCircle(MakeGradientCircle(64, 64));
SkBitmap checkerboard;
MakeCheckerboard(&checkerboard);
SkAutoTUnref<SkImageFilter> gradientCircleSource(
SkImageSource::Create(gradientCircle));
SkAutoTUnref<SkImageFilter> noopCropped(
SkOffsetImageFilter::Create(0, 0, nullptr, &cropRect));
SkScalar sk255 = SkIntToScalar(255);
SkScalar matrix[20] = { 1, 0, 0, 0, 0,
0, 1, 0, 0, sk255,
0, 0, 1, 0, 0,
0, 0, 0, 0, sk255 };
SkAutoTUnref<SkColorFilter> cfAlphaTrans(SkColorMatrixFilter::Create(matrix));
SkRect r = SkRect::MakeWH(SkIntToScalar(64), SkIntToScalar(64));
SkScalar MARGIN = SkIntToScalar(12);
SkIRect bounds;
r.roundOut(&bounds);
SkPaint paint;
canvas->translate(MARGIN, MARGIN);
for (int outset = -15; outset <= 20; outset += 5) {
canvas->save();
SkRect rect = cropRect.rect();
rect.outset(SkIntToScalar(outset),
SkIntToScalar(outset));
SkImageFilter::CropRect big_rect(rect, SkImageFilter::CropRect::kHasAll_CropEdge);
Draw(canvas, checkerboard, rect, SkColorFilterImageFilter::Create(
cfAlphaTrans, noopCropped.get(), &big_rect));
Draw(canvas, checkerboard, rect, SkBlurImageFilter::Create(
8.0f, 8.0f, noopCropped.get(), &big_rect));
Draw(canvas, checkerboard, rect, SkDilateImageFilter::Create(
2, 2, noopCropped.get(), &big_rect));
Draw(canvas, checkerboard, rect, SkErodeImageFilter::Create(
2, 2, noopCropped.get(), &big_rect));
Draw(canvas, checkerboard, rect, SkDropShadowImageFilter::Create(
SkIntToScalar(10), SkIntToScalar(10), SkIntToScalar(3), SkIntToScalar(3),
SK_ColorBLUE, SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode,
noopCropped.get(), &big_rect));
Draw(canvas, checkerboard, rect, SkDisplacementMapEffect::Create(
SkDisplacementMapEffect::kR_ChannelSelectorType,
SkDisplacementMapEffect::kR_ChannelSelectorType,
SkIntToScalar(12),
gradientCircleSource.get(),
noopCropped.get(),
&big_rect));
Draw(canvas, checkerboard, rect, SkOffsetImageFilter::Create(
SkIntToScalar(-8), SkIntToScalar(16), noopCropped.get(), &big_rect));
canvas->restore();
canvas->translate(0, SkIntToScalar(80));
}
}
private:
static void MakeCheckerboard(SkBitmap* bitmap) {
bitmap->allocN32Pixels(64, 64);
SkCanvas canvas(*bitmap);
canvas.clear(0xFFFF0000);
SkPaint darkPaint;
darkPaint.setColor(sk_tool_utils::color_to_565(0xFF404040));
SkPaint lightPaint;
lightPaint.setColor(sk_tool_utils::color_to_565(0xFFA0A0A0));
for (int y = 8; y < 48; y += 16) {
for (int x = 8; x < 48; x += 16) {
canvas.save();
canvas.translate(SkIntToScalar(x), SkIntToScalar(y));
canvas.drawRect(SkRect::MakeXYWH(0, 0, 8, 8), darkPaint);
canvas.drawRect(SkRect::MakeXYWH(8, 0, 8, 8), lightPaint);
canvas.drawRect(SkRect::MakeXYWH(0, 8, 8, 8), lightPaint);
canvas.drawRect(SkRect::MakeXYWH(8, 8, 8, 8), darkPaint);
canvas.restore();
}
}
}
static SkImage* MakeGradientCircle(int width, int height) {
SkScalar x = SkIntToScalar(width / 2);
SkScalar y = SkIntToScalar(height / 2);
SkScalar radius = SkMinScalar(x, y) * 0.8f;
SkAutoTUnref<SkSurface> surface(SkSurface::NewRasterN32Premul(width, height));
SkCanvas* canvas = surface->getCanvas();
canvas->clear(0x00000000);
SkColor colors[2];
colors[0] = SK_ColorWHITE;
colors[1] = SK_ColorBLACK;
SkAutoTUnref<SkShader> shader(
SkGradientShader::CreateRadial(SkPoint::Make(x, y), radius, colors, nullptr, 2,
SkShader::kClamp_TileMode)
);
SkPaint paint;
paint.setShader(shader);
canvas->drawCircle(x, y, radius, paint);
return surface->newImageSnapshot();
}
static void Draw(SkCanvas* canvas, const SkBitmap& bitmap, const SkRect& rect, SkImageFilter* filter) {
SkPaint paint;
paint.setImageFilter(filter)->unref();
canvas->saveLayer(&rect, &paint);
canvas->drawBitmap(bitmap, 0, 0);
canvas->restore();
SkPaint strokePaint;
strokePaint.setColor(0xFFFF0000);
strokePaint.setStyle(SkPaint::kStroke_Style);
canvas->drawRect(rect, strokePaint);
canvas->translate(SkIntToScalar(80), 0);
}
typedef GM INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
static skiagm::GM* MyFactory(void*) { return new ImageFiltersCropExpandGM; }
static skiagm::GMRegistry reg(MyFactory);
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