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/*
* Copyright 2012 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 "SkBlurImageFilter.h"
#include "SkColorFilter.h"
#include "SkColorFilterImageFilter.h"
#include "SkColorMatrixFilter.h"
#include "SkImage.h"
#include "SkImageSource.h"
#include "SkMatrixConvolutionImageFilter.h"
#include "SkOffsetImageFilter.h"
#include "SkReadBuffer.h"
#include "SkSpecialImage.h"
#include "SkSpecialSurface.h"
#include "SkWriteBuffer.h"
#include "SkMergeImageFilter.h"
#include "SkMorphologyImageFilter.h"
#include "SkXfermodeImageFilter.h"
class ImageFiltersGraphGM : public skiagm::GM {
public:
ImageFiltersGraphGM() {}
protected:
SkString onShortName() override {
return SkString("imagefiltersgraph");
}
SkISize onISize() override { return SkISize::Make(600, 150); }
void onOnceBeforeDraw() override {
fImage = SkImage::MakeFromBitmap(
sk_tool_utils::create_string_bitmap(100, 100, SK_ColorWHITE, 20, 70, 96, "e"));
}
void onDraw(SkCanvas* canvas) override {
canvas->clear(SK_ColorBLACK);
{
sk_sp<SkImageFilter> bitmapSource(SkImageSource::Make(fImage));
sk_sp<SkColorFilter> cf(SkColorFilter::MakeModeFilter(SK_ColorRED,
SkXfermode::kSrcIn_Mode));
sk_sp<SkImageFilter> blur(SkBlurImageFilter::Make(4.0f, 4.0f, std::move(bitmapSource)));
sk_sp<SkImageFilter> erode(SkErodeImageFilter::Make(4, 4, blur));
sk_sp<SkImageFilter> color(SkColorFilterImageFilter::Make(std::move(cf),
std::move(erode)));
sk_sp<SkImageFilter> merge(SkMergeImageFilter::Make(blur, color));
SkPaint paint;
paint.setImageFilter(std::move(merge));
canvas->drawPaint(paint);
canvas->translate(SkIntToScalar(100), 0);
}
{
sk_sp<SkImageFilter> morph(SkDilateImageFilter::Make(5, 5, nullptr));
SkScalar matrix[20] = { SK_Scalar1, 0, 0, 0, 0,
0, SK_Scalar1, 0, 0, 0,
0, 0, SK_Scalar1, 0, 0,
0, 0, 0, 0.5f, 0 };
sk_sp<SkColorFilter> matrixFilter(SkColorFilter::MakeMatrixFilterRowMajor255(matrix));
sk_sp<SkImageFilter> colorMorph(SkColorFilterImageFilter::Make(std::move(matrixFilter),
std::move(morph)));
SkPaint paint;
paint.setImageFilter(SkXfermodeImageFilter::Make(
SkXfermode::Make(SkXfermode::kSrcOver_Mode),
std::move(colorMorph)));
DrawClippedImage(canvas, fImage.get(), paint);
canvas->translate(SkIntToScalar(100), 0);
}
{
SkScalar matrix[20] = { SK_Scalar1, 0, 0, 0, 0,
0, SK_Scalar1, 0, 0, 0,
0, 0, SK_Scalar1, 0, 0,
0, 0, 0, 0.5f, 0 };
sk_sp<SkColorFilter> matrixCF(SkColorFilter::MakeMatrixFilterRowMajor255(matrix));
sk_sp<SkImageFilter> matrixFilter(SkColorFilterImageFilter::Make(std::move(matrixCF),
nullptr));
sk_sp<SkImageFilter> offsetFilter(SkOffsetImageFilter::Make(10.0f, 10.f,
matrixFilter));
SkPaint paint;
paint.setImageFilter(
SkXfermodeImageFilter::MakeArithmetic(0, 1, 1, 0, true,
std::move(matrixFilter),
std::move(offsetFilter),
nullptr));
DrawClippedImage(canvas, fImage.get(), paint);
canvas->translate(SkIntToScalar(100), 0);
}
{
sk_sp<SkImageFilter> blur(SkBlurImageFilter::Make(SkIntToScalar(10),
SkIntToScalar(10),
nullptr));
SkImageFilter::CropRect cropRect(SkRect::MakeWH(SkIntToScalar(95), SkIntToScalar(100)));
SkPaint paint;
paint.setImageFilter(
SkXfermodeImageFilter::Make(SkXfermode::Make(SkXfermode::kSrcIn_Mode),
std::move(blur),
nullptr, &cropRect));
DrawClippedImage(canvas, fImage.get(), paint);
canvas->translate(SkIntToScalar(100), 0);
}
{
// Dilate -> matrix convolution.
// This tests that a filter using asFragmentProcessor (matrix
// convolution) correctly handles a non-zero source offset
// (supplied by the dilate).
sk_sp<SkImageFilter> dilate(SkDilateImageFilter::Make(5, 5, nullptr));
SkScalar kernel[9] = {
SkIntToScalar(-1), SkIntToScalar( -1 ), SkIntToScalar(-1),
SkIntToScalar(-1), SkIntToScalar( 7 ), SkIntToScalar(-1),
SkIntToScalar(-1), SkIntToScalar( -1 ), SkIntToScalar(-1),
};
SkISize kernelSize = SkISize::Make(3, 3);
SkScalar gain = 1.0f, bias = SkIntToScalar(0);
SkIPoint kernelOffset = SkIPoint::Make(1, 1);
auto tileMode = SkMatrixConvolutionImageFilter::kClamp_TileMode;
bool convolveAlpha = false;
sk_sp<SkImageFilter> convolve(SkMatrixConvolutionImageFilter::Make(kernelSize,
kernel,
gain,
bias,
kernelOffset,
tileMode,
convolveAlpha,
std::move(dilate)));
SkPaint paint;
paint.setImageFilter(std::move(convolve));
DrawClippedImage(canvas, fImage.get(), paint);
canvas->translate(SkIntToScalar(100), 0);
}
{
// Test that crop offsets are absolute, not relative to the parent's crop rect.
sk_sp<SkColorFilter> cf1(SkColorFilter::MakeModeFilter(SK_ColorBLUE,
SkXfermode::kSrcIn_Mode));
sk_sp<SkColorFilter> cf2(SkColorFilter::MakeModeFilter(SK_ColorGREEN,
SkXfermode::kSrcIn_Mode));
SkImageFilter::CropRect outerRect(SkRect::MakeXYWH(SkIntToScalar(10), SkIntToScalar(10),
SkIntToScalar(80), SkIntToScalar(80)));
SkImageFilter::CropRect innerRect(SkRect::MakeXYWH(SkIntToScalar(20), SkIntToScalar(20),
SkIntToScalar(60), SkIntToScalar(60)));
sk_sp<SkImageFilter> color1(SkColorFilterImageFilter::Make(std::move(cf1),
nullptr,
&outerRect));
sk_sp<SkImageFilter> color2(SkColorFilterImageFilter::Make(std::move(cf2),
std::move(color1),
&innerRect));
SkPaint paint;
paint.setImageFilter(std::move(color2));
paint.setColor(SK_ColorRED);
canvas->drawRect(SkRect::MakeXYWH(0, 0, 100, 100), paint);
canvas->translate(SkIntToScalar(100), 0);
}
}
private:
static void DrawClippedImage(SkCanvas* canvas, const SkImage* image, const SkPaint& paint) {
canvas->save();
canvas->clipRect(SkRect::MakeIWH(image->width(), image->height()));
canvas->drawImage(image, 0, 0, &paint);
canvas->restore();
}
sk_sp<SkImage> fImage;
typedef GM INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
DEF_GM(return new ImageFiltersGraphGM;)
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