| /* |
| * Copyright 2016 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 "SkCanvas.h" |
| #include "SkColorFilter.h" |
| #include "SkColorFilterImageFilter.h" |
| #include "SkDropShadowImageFilter.h" |
| #include "SkSurface.h" |
| #include "ToolUtils.h" |
| #include "gm.h" |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| static void show_bounds(SkCanvas* canvas, const SkIRect& subset, const SkIRect& clip) { |
| SkIRect rects[] { subset, clip }; |
| SkColor colors[] { SK_ColorRED, SK_ColorBLUE }; |
| |
| SkPaint paint; |
| paint.setStyle(SkPaint::kStroke_Style); |
| |
| for (size_t i = 0; i < SK_ARRAY_COUNT(rects); ++i) { |
| paint.setColor(colors[i]); |
| canvas->drawRect(SkRect::Make(rects[i]), paint); |
| } |
| } |
| |
| // In this GM, we're going to feed the inner portion of a 100x100 checkboard |
| // (i.e., strip off a 25-wide border) through the makeWithFilter method. |
| // We'll then draw the appropriate subset of the result to the screen at the |
| // given offset. |
| class ImageMakeWithFilterGM : public skiagm::GM { |
| public: |
| ImageMakeWithFilterGM () {} |
| |
| protected: |
| SkString onShortName() override { |
| return SkString("imagemakewithfilter"); |
| } |
| |
| SkISize onISize() override { return SkISize::Make(440, 530); } |
| |
| void onDraw(SkCanvas* canvas) override { |
| auto cf = SkColorFilter::MakeModeFilter(SK_ColorGREEN, SkBlendMode::kSrc); |
| sk_sp<SkImageFilter> filters[] = { |
| SkColorFilterImageFilter::Make(std::move(cf), nullptr), |
| SkBlurImageFilter::Make(2.0f, 2.0f, nullptr), |
| SkDropShadowImageFilter::Make( |
| 10.0f, 5.0f, 3.0f, 3.0f, SK_ColorBLUE, |
| SkDropShadowImageFilter::kDrawShadowAndForeground_ShadowMode, |
| nullptr), |
| }; |
| |
| SkIRect clipBounds[] { |
| { -20, -20, 100, 100 }, |
| { 0, 0, 75, 75 }, |
| { 20, 20, 100, 100 }, |
| { -20, -20, 50, 50 }, |
| { 20, 20, 50, 50 }, |
| }; |
| |
| SkImageInfo info = SkImageInfo::MakeN32(100, 100, kPremul_SkAlphaType); |
| SkScalar MARGIN = SkIntToScalar(40); |
| SkScalar DX = info.width() + MARGIN; |
| SkScalar DY = info.height() + MARGIN; |
| |
| canvas->translate(MARGIN, MARGIN); |
| |
| sk_sp<SkSurface> surface = ToolUtils::makeSurface(canvas, info); |
| ToolUtils::draw_checkerboard(surface->getCanvas()); |
| sk_sp<SkImage> source = surface->makeImageSnapshot(); |
| |
| for (auto clipBound : clipBounds) { |
| canvas->save(); |
| for (size_t i = 0; i < SK_ARRAY_COUNT(filters); ++i) { |
| SkIRect subset = SkIRect::MakeXYWH(25, 25, 50, 50); |
| SkIRect outSubset; |
| SkIPoint offset; |
| sk_sp<SkImage> result = source->makeWithFilter(filters[i].get(), subset, clipBound, |
| &outSubset, &offset); |
| SkASSERT(result); |
| SkASSERT(source->isTextureBacked() == result->isTextureBacked()); |
| result = result->makeSubset(outSubset); |
| canvas->drawImage(result.get(), SkIntToScalar(offset.fX), SkIntToScalar(offset.fY)); |
| show_bounds(canvas, SkIRect::MakeXYWH(offset.x(), offset.y(), outSubset.width(), |
| outSubset.height()), clipBound); |
| canvas->translate(DX, 0); |
| } |
| canvas->restore(); |
| canvas->translate(0, DY); |
| } |
| } |
| |
| private: |
| typedef GM INHERITED; |
| }; |
| DEF_GM( return new ImageMakeWithFilterGM; ) |