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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 "sk_tool_utils.h"
#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"
#define RESIZE_FACTOR_X SkIntToScalar(2)
#define RESIZE_FACTOR_Y SkIntToScalar(5)
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) * 0.8f;
auto 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();
}
static void draw_clipped_filter(SkCanvas* canvas, sk_sp<SkImageFilter> filter, size_t i,
const SkRect& primBounds, const SkRect& clipBounds) {
SkPaint paint;
paint.setColor(SK_ColorWHITE);
paint.setImageFilter(std::move(filter));
paint.setAntiAlias(true);
canvas->save();
canvas->clipRect(clipBounds);
if (5 == i) {
canvas->translate(SkIntToScalar(16), SkIntToScalar(-32));
} else if (6 == i) {
canvas->scale(SkScalarInvert(RESIZE_FACTOR_X), SkScalarInvert(RESIZE_FACTOR_Y));
}
canvas->drawCircle(primBounds.centerX(), primBounds.centerY(),
primBounds.width() * 2 / 5, paint);
canvas->restore();
}
namespace skiagm {
class ImageFiltersClippedGM : public GM {
public:
ImageFiltersClippedGM() {
this->setBGColor(0x00000000);
}
protected:
SkString onShortName() override {
return SkString("imagefiltersclipped");
}
SkISize onISize() override {
return SkISize::Make(860, 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));
SkMatrix resizeMatrix;
resizeMatrix.setScale(RESIZE_FACTOR_X, RESIZE_FACTOR_Y);
SkPoint3 pointLocation = SkPoint3::Make(32, 32, SkIntToScalar(10));
sk_sp<SkImageFilter> filters[] = {
SkBlurImageFilter::Make(SkIntToScalar(12), SkIntToScalar(12), nullptr),
SkDropShadowImageFilter::Make(
SkIntToScalar(10), SkIntToScalar(10),
SkIntToScalar(3), SkIntToScalar(3), SK_ColorGREEN,
SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode,
nullptr),
SkDisplacementMapEffect::Make(SkDisplacementMapEffect::kR_ChannelSelectorType,
SkDisplacementMapEffect::kR_ChannelSelectorType,
SkIntToScalar(12),
std::move(gradient),
checkerboard),
SkDilateImageFilter::Make(2, 2, checkerboard),
SkErodeImageFilter::Make(2, 2, checkerboard),
SkOffsetImageFilter::Make(SkIntToScalar(-16), SkIntToScalar(32), nullptr),
SkImageFilter::MakeMatrixFilter(resizeMatrix, kNone_SkFilterQuality, nullptr),
SkLightingImageFilter::MakePointLitDiffuse(pointLocation, SK_ColorWHITE, SK_Scalar1,
SkIntToScalar(2), checkerboard),
};
SkRect r = SkRect::MakeWH(SkIntToScalar(64), SkIntToScalar(64));
SkScalar margin = SkIntToScalar(16);
SkRect bounds = r;
bounds.outset(margin, margin);
canvas->save();
for (int xOffset = 0; xOffset < 80; xOffset += 16) {
canvas->save();
bounds.fLeft = SkIntToScalar(xOffset);
for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) {
draw_clipped_filter(canvas, filters[i], i, r, bounds);
canvas->translate(r.width() + margin, 0);
}
canvas->restore();
canvas->translate(0, r.height() + margin);
}
canvas->restore();
SkPaint noisePaint;
noisePaint.setShader(SkPerlinNoiseShader::MakeFractalNoise(0.1f, 0.05f, 1, 0));
sk_sp<SkImageFilter> rectFilter(SkPaintImageFilter::Make(noisePaint));
canvas->translate(SK_ARRAY_COUNT(filters)*(r.width() + margin), 0);
for (int xOffset = 0; xOffset < 80; xOffset += 16) {
bounds.fLeft = SkIntToScalar(xOffset);
draw_clipped_filter(canvas, rectFilter, 0, r, bounds);
canvas->translate(0, r.height() + margin);
}
}
private:
sk_sp<SkImage> fCheckerboard, fGradientCircle;
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
DEF_GM(return new ImageFiltersClippedGM;)
}
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