/*
|
* Copyright 2015 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 "SkMorphologyImageFilter.h"
|
#include "SkScalar.h"
|
#include "SkSurface.h"
|
#include "gm.h"
|
#include "sk_tool_utils.h"
|
|
namespace skiagm {
|
|
// This GM draws image filters with a CTM containing shearing / rotation.
|
// It checks that the scale portion of the CTM is correctly extracted
|
// and applied to the image inputs separately from the non-scale portion.
|
|
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();
|
}
|
|
class ImageFiltersTransformedGM : public GM {
|
public:
|
ImageFiltersTransformedGM() {
|
this->setBGColor(SK_ColorBLACK);
|
}
|
|
protected:
|
|
SkString onShortName() override { return SkString("imagefilterstransformed"); }
|
|
SkISize onISize() override { return SkISize::Make(420, 240); }
|
|
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 {
|
sk_sp<SkImageFilter> gradient(SkImageSource::Make(fGradientCircle));
|
sk_sp<SkImageFilter> checkerboard(SkImageSource::Make(fCheckerboard));
|
sk_sp<SkImageFilter> filters[] = {
|
SkBlurImageFilter::Make(12, 0, nullptr),
|
SkDropShadowImageFilter::Make(0, 15, 8, 0, SK_ColorGREEN,
|
SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode, nullptr),
|
SkDisplacementMapEffect::Make(SkDisplacementMapEffect::kR_ChannelSelectorType,
|
SkDisplacementMapEffect::kR_ChannelSelectorType,
|
12,
|
std::move(gradient),
|
checkerboard),
|
SkDilateImageFilter::Make(2, 2, checkerboard),
|
SkErodeImageFilter::Make(2, 2, checkerboard),
|
};
|
|
const SkScalar margin = SkIntToScalar(20);
|
const SkScalar size = SkIntToScalar(60);
|
|
for (size_t j = 0; j < 3; j++) {
|
canvas->save();
|
canvas->translate(margin, 0);
|
for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) {
|
SkPaint paint;
|
paint.setColor(SK_ColorWHITE);
|
paint.setImageFilter(filters[i]);
|
paint.setAntiAlias(true);
|
canvas->save();
|
canvas->translate(size * SK_ScalarHalf, size * SK_ScalarHalf);
|
canvas->scale(SkDoubleToScalar(0.8), SkDoubleToScalar(0.8));
|
if (j == 1) {
|
canvas->rotate(SkIntToScalar(45));
|
} else if (j == 2) {
|
canvas->skew(SkDoubleToScalar(0.5), SkDoubleToScalar(0.2));
|
}
|
canvas->translate(-size * SK_ScalarHalf, -size * SK_ScalarHalf);
|
canvas->drawOval(SkRect::MakeXYWH(0, size * SkDoubleToScalar(0.1),
|
size, size * SkDoubleToScalar(0.6)), paint);
|
canvas->restore();
|
canvas->translate(size + margin, 0);
|
}
|
canvas->restore();
|
canvas->translate(0, size + margin);
|
}
|
}
|
|
private:
|
sk_sp<SkImage> fCheckerboard;
|
sk_sp<SkImage> fGradientCircle;
|
typedef GM INHERITED;
|
};
|
DEF_GM( return new ImageFiltersTransformedGM; )
|
}
|
|
//////////////////////////////////////////////////////////////////////////////
|
#include "SkXfermodeImageFilter.h"
|
|
DEF_SIMPLE_GM(rotate_imagefilter, canvas, 500, 500) {
|
SkPaint paint;
|
|
const SkRect r = SkRect::MakeXYWH(50, 50, 100, 100);
|
|
sk_sp<SkImageFilter> filters[] = {
|
nullptr,
|
SkBlurImageFilter::Make(6, 0, nullptr),
|
SkXfermodeImageFilter::Make(SkBlendMode::kSrcOver, nullptr),
|
};
|
|
for (auto& filter : filters) {
|
paint.setAntiAlias(false);
|
paint.setImageFilter(filter);
|
|
canvas->save();
|
|
canvas->drawRect(r, paint);
|
|
canvas->translate(150, 0);
|
canvas->save();
|
canvas->rotate(30, 100, 100);
|
canvas->drawRect(r, paint);
|
canvas->restore();
|
|
paint.setAntiAlias(true);
|
canvas->translate(150, 0);
|
canvas->save();
|
canvas->rotate(30, 100, 100);
|
canvas->drawRect(r, paint);
|
canvas->restore();
|
|
canvas->restore();
|
canvas->translate(0, 150);
|
}
|
}
|
