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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 "SkBlurImageFilter.h"
#include "SkColor.h"
#include "SkDisplacementMapEffect.h"
#include "SkDropShadowImageFilter.h"
#include "SkGradientShader.h"
#include "SkImage.h"
#include "SkImageSource.h"
#include "SkLightingImageFilter.h"
#include "SkMorphologyImageFilter.h"
#include "SkOffsetImageFilter.h"
#include "SkPaintImageFilter.h"
#include "SkPerlinNoiseShader.h"
#include "SkPoint3.h"
#include "SkScalar.h"
#include "SkSurface.h"
#include "gm.h"
#include "sk_tool_utils.h"
#define RESIZE_FACTOR SkIntToScalar(4)
static sk_sp<SkImage> make_gradient_circle(int width, int height) {
SkScalar x = SkIntToScalar(width / 2);
SkScalar y = SkIntToScalar(height / 2);
SkScalar radius = SkMinScalar(x, y) * 4 / 5;
sk_sp<SkSurface> surface(SkSurface::MakeRasterN32Premul(width, height));
SkCanvas* canvas = surface->getCanvas();
canvas->clear(0x00000000);
SkColor colors[2];
colors[0] = SK_ColorWHITE;
colors[1] = SK_ColorBLACK;
SkPaint paint;
paint.setShader(SkGradientShader::MakeRadial(SkPoint::Make(x, y), radius, colors, nullptr,
2, SkShader::kClamp_TileMode));
canvas->drawCircle(x, y, radius, paint);
return surface->makeImageSnapshot();
}
namespace skiagm {
class ImageFiltersScaledGM : public GM {
public:
ImageFiltersScaledGM() {
this->setBGColor(0x00000000);
}
protected:
SkString onShortName() override {
return SkString("imagefiltersscaled");
}
SkISize onISize() override {
return SkISize::Make(1428, 500);
}
void onOnceBeforeDraw() override {
fCheckerboard = SkImage::MakeFromBitmap(
sk_tool_utils::create_checkerboard_bitmap(64, 64, 0xFFA0A0A0, 0xFF404040, 8));
fGradientCircle = make_gradient_circle(64, 64);
}
void onDraw(SkCanvas* canvas) override {
canvas->clear(SK_ColorBLACK);
sk_sp<SkImageFilter> gradient(SkImageSource::Make(fGradientCircle));
sk_sp<SkImageFilter> checkerboard(SkImageSource::Make(fCheckerboard));
SkPaint noisePaint;
noisePaint.setShader(SkPerlinNoiseShader::MakeFractalNoise(SkDoubleToScalar(0.1),
SkDoubleToScalar(0.05), 1, 0));
SkPoint3 pointLocation = SkPoint3::Make(0, 0, SkIntToScalar(10));
SkPoint3 spotLocation = SkPoint3::Make(SkIntToScalar(-10),
SkIntToScalar(-10),
SkIntToScalar(20));
SkPoint3 spotTarget = SkPoint3::Make(SkIntToScalar(40), SkIntToScalar(40), 0);
SkScalar spotExponent = SK_Scalar1;
SkScalar cutoffAngle = SkIntToScalar(15);
SkScalar kd = SkIntToScalar(2);
SkScalar surfaceScale = SkIntToScalar(1);
SkColor white(0xFFFFFFFF);
SkMatrix resizeMatrix;
resizeMatrix.setScale(RESIZE_FACTOR, RESIZE_FACTOR);
sk_sp<SkImageFilter> filters[] = {
SkBlurImageFilter::Make(SkIntToScalar(4), SkIntToScalar(4), nullptr),
SkDropShadowImageFilter::Make(
SkIntToScalar(5), SkIntToScalar(10),
SkIntToScalar(3), SkIntToScalar(3), SK_ColorYELLOW,
SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode,
nullptr),
SkDisplacementMapEffect::Make(SkDisplacementMapEffect::kR_ChannelSelectorType,
SkDisplacementMapEffect::kR_ChannelSelectorType,
SkIntToScalar(12),
std::move(gradient),
checkerboard),
SkDilateImageFilter::Make(1, 1, checkerboard),
SkErodeImageFilter::Make(1, 1, checkerboard),
SkOffsetImageFilter::Make(SkIntToScalar(32), 0, nullptr),
SkImageFilter::MakeMatrixFilter(resizeMatrix, kNone_SkFilterQuality, nullptr),
SkPaintImageFilter::Make(noisePaint),
SkLightingImageFilter::MakePointLitDiffuse(pointLocation, white, surfaceScale, kd,
nullptr),
SkLightingImageFilter::MakeSpotLitDiffuse(spotLocation, spotTarget, spotExponent,
cutoffAngle, white, surfaceScale, kd,
nullptr),
};
SkVector scales[] = {
SkVector::Make(SkScalarInvert(2), SkScalarInvert(2)),
SkVector::Make(SkIntToScalar(1), SkIntToScalar(1)),
SkVector::Make(SkIntToScalar(1), SkIntToScalar(2)),
SkVector::Make(SkIntToScalar(2), SkIntToScalar(1)),
SkVector::Make(SkIntToScalar(2), SkIntToScalar(2)),
};
SkRect r = SkRect::MakeWH(SkIntToScalar(64), SkIntToScalar(64));
SkScalar margin = SkIntToScalar(16);
SkRect bounds = r;
bounds.outset(margin, margin);
for (size_t j = 0; j < SK_ARRAY_COUNT(scales); ++j) {
canvas->save();
for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) {
SkPaint paint;
paint.setColor(SK_ColorBLUE);
paint.setImageFilter(filters[i]);
paint.setAntiAlias(true);
canvas->save();
canvas->scale(scales[j].fX, scales[j].fY);
canvas->clipRect(r);
if (5 == i) {
canvas->translate(SkIntToScalar(-32), 0);
} else if (6 == i) {
canvas->scale(SkScalarInvert(RESIZE_FACTOR),
SkScalarInvert(RESIZE_FACTOR));
}
canvas->drawCircle(r.centerX(), r.centerY(), r.width()*2/5, paint);
canvas->restore();
canvas->translate(r.width() * scales[j].fX + margin, 0);
}
canvas->restore();
canvas->translate(0, r.height() * scales[j].fY + margin);
}
}
private:
sk_sp<SkImage> fCheckerboard, fGradientCircle;
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
DEF_GM(return new ImageFiltersScaledGM;)
}
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