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Diffstat (limited to 'gm/localmatriximagefilter.cpp')
-rw-r--r-- | gm/localmatriximagefilter.cpp | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/gm/localmatriximagefilter.cpp b/gm/localmatriximagefilter.cpp new file mode 100644 index 0000000000..1bdc940d92 --- /dev/null +++ b/gm/localmatriximagefilter.cpp @@ -0,0 +1,103 @@ +/* + * 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 "gm.h" +#include "SkCanvas.h" +#include "SkBlurImageFilter.h" +#include "SkColorFilterImageFilter.h" +#include "SkModeColorFilter.h" +#include "SkMorphologyImageFilter.h" +#include "SkOffsetImageFilter.h" +#include "SkSurface.h" + +static SkImage* make_image(SkCanvas* rootCanvas) { + SkImageInfo info = SkImageInfo::MakeN32Premul(100, 100); + SkAutoTUnref<SkSurface> surface(rootCanvas->newSurface(info)); + if (!surface) { + surface.reset(SkSurface::NewRaster(info)); + } + + SkPaint paint; + paint.setAntiAlias(true); + paint.setColor(SK_ColorRED); + surface->getCanvas()->drawCircle(50, 50, 50, paint); + return surface->newImageSnapshot(); +} + +typedef SkImageFilter* (*ImageFilterFactory)(); + +// +[]{...} did not work on windows (VS) +// (ImageFilterFactory)[]{...} did not work on linux (gcc) +// hence this cast function +template <typename T> ImageFilterFactory IFCCast(T arg) { return arg; } + +// Show the effect of localmatriximagefilter with various matrices, on various filters +class LocalMatrixImageFilterGM : public skiagm::GM { +public: + LocalMatrixImageFilterGM() {} + +protected: + SkString onShortName() override { + return SkString("localmatriximagefilter"); + } + + SkISize onISize() override { + return SkISize::Make(640, 640); + } + + static void show_image(SkCanvas* canvas, SkImage* image, SkImageFilter* filter) { + SkPaint paint; + paint.setStyle(SkPaint::kStroke_Style); + SkRect r = SkRect::MakeIWH(image->width(), image->height()).makeOutset(SK_ScalarHalf, + SK_ScalarHalf); + canvas->drawRect(r, paint); + + paint.setStyle(SkPaint::kFill_Style); + paint.setImageFilter(filter); + canvas->drawImage(image, 0, 0, &paint); + } + + void onDraw(SkCanvas* canvas) override { + SkAutoTUnref<SkImage> image0(make_image(canvas)); + + const ImageFilterFactory factories[] = { + IFCCast([]{ return SkBlurImageFilter::Create(8, 8); }), + IFCCast([]{ return SkDilateImageFilter::Create(8, 8); }), + IFCCast([]{ return SkErodeImageFilter::Create(8, 8); }), + IFCCast([]{ return SkOffsetImageFilter::Create(8, 8); }), + }; + + const SkMatrix matrices[] = { + SkMatrix::MakeScale(SK_ScalarHalf, SK_ScalarHalf), + SkMatrix::MakeScale(2, 2), + SkMatrix::MakeTrans(10, 10) + }; + + const SkScalar spacer = image0->width() * 3.0f / 2; + + canvas->translate(40, 40); + for (auto&& factory : factories) { + SkAutoTUnref<SkImageFilter> filter(factory()); + + canvas->save(); + show_image(canvas, image0, filter); + for (const auto& matrix : matrices) { + SkAutoTUnref<SkImageFilter> localFilter( + SkImageFilter::CreateLocalMatrixFilter(matrix, filter)); + canvas->translate(spacer, 0); + show_image(canvas, image0, localFilter); + } + canvas->restore(); + canvas->translate(0, spacer); + } + } + +private: + typedef GM INHERITED; +}; +DEF_GM( return new LocalMatrixImageFilterGM; ) + |