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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 "SkBitmapSource.h"
#include "SkBlurImageFilter.h"
#include "SkColor.h"
#include "SkDisplacementMapEffect.h"
#include "SkDropShadowImageFilter.h"
#include "SkGradientShader.h"
#include "SkLightingImageFilter.h"
#include "SkMorphologyImageFilter.h"
#include "SkOffsetImageFilter.h"
#include "SkPerlinNoiseShader.h"
#include "SkPoint3.h"
#include "SkRectShaderImageFilter.h"
#include "SkScalar.h"
#include "gm.h"
#define RESIZE_FACTOR_X SkIntToScalar(2)
#define RESIZE_FACTOR_Y SkIntToScalar(5)
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 makeGradientCircle(int width, int height) {
SkScalar x = SkIntToScalar(width / 2);
SkScalar y = SkIntToScalar(height / 2);
SkScalar radius = SkMinScalar(x, y) * 0.8f;
fGradientCircle.allocN32Pixels(width, height);
SkCanvas canvas(fGradientCircle);
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);
}
static void draw_clipped_filter(SkCanvas* canvas, SkImageFilter* filter, size_t i,
const SkRect& primBounds, const SkRect& clipBounds) {
SkPaint paint;
paint.setColor(SK_ColorWHITE);
paint.setImageFilter(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();
}
void onOnceBeforeDraw() override {
fCheckerboard = sk_tool_utils::create_checkerboard_bitmap(64, 64,
0xFFA0A0A0, 0xFF404040, 8);
this->makeGradientCircle(64, 64);
}
void onDraw(SkCanvas* canvas) override {
canvas->clear(SK_ColorBLACK);
SkAutoTUnref<SkImageFilter> gradient(SkBitmapSource::Create(fGradientCircle));
SkAutoTUnref<SkImageFilter> checkerboard(SkBitmapSource::Create(fCheckerboard));
SkAutoTUnref<SkShader> noise(SkPerlinNoiseShader::CreateFractalNoise(
SkDoubleToScalar(0.1), SkDoubleToScalar(0.05), 1, 0));
SkMatrix resizeMatrix;
resizeMatrix.setScale(RESIZE_FACTOR_X, RESIZE_FACTOR_Y);
SkPoint3 pointLocation = SkPoint3::Make(32, 32, SkIntToScalar(10));
SkImageFilter* filters[] = {
SkBlurImageFilter::Create(SkIntToScalar(12), SkIntToScalar(12)),
SkDropShadowImageFilter::Create(SkIntToScalar(10), SkIntToScalar(10),
SkIntToScalar(3), SkIntToScalar(3), SK_ColorGREEN,
SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode),
SkDisplacementMapEffect::Create(SkDisplacementMapEffect::kR_ChannelSelectorType,
SkDisplacementMapEffect::kR_ChannelSelectorType,
SkIntToScalar(12),
gradient.get(),
checkerboard.get()),
SkDilateImageFilter::Create(2, 2, checkerboard.get()),
SkErodeImageFilter::Create(2, 2, checkerboard.get()),
SkOffsetImageFilter::Create(SkIntToScalar(-16), SkIntToScalar(32)),
SkImageFilter::CreateMatrixFilter(resizeMatrix, kNone_SkFilterQuality),
SkLightingImageFilter::CreatePointLitDiffuse(pointLocation, SK_ColorWHITE, SK_Scalar1, SkIntToScalar(2), checkerboard.get()),
};
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();
for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) {
SkSafeUnref(filters[i]);
}
SkImageFilter* rectFilter = SkRectShaderImageFilter::Create(noise);
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);
}
SkSafeUnref(rectFilter);
}
private:
SkBitmap fCheckerboard;
SkBitmap fGradientCircle;
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
DEF_GM(return new ImageFiltersClippedGM;)
}
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