/* * Copyright 2011 Google Inc. * * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ #include "gm/gm.h" #include "include/core/SkBitmap.h" #include "include/core/SkBlendMode.h" #include "include/core/SkCanvas.h" #include "include/core/SkColor.h" #include "include/core/SkColorFilter.h" #include "include/core/SkFlattenable.h" #include "include/core/SkFont.h" #include "include/core/SkImageFilter.h" #include "include/core/SkPaint.h" #include "include/core/SkPoint.h" #include "include/core/SkRSXform.h" #include "include/core/SkRect.h" #include "include/core/SkRefCnt.h" #include "include/core/SkScalar.h" #include "include/core/SkSize.h" #include "include/core/SkString.h" #include "include/core/SkTypeface.h" #include "include/core/SkTypes.h" #include "include/effects/SkImageFilters.h" #include "include/utils/SkTextUtils.h" #include "src/core/SkImageFilter_Base.h" #include "src/core/SkSpecialImage.h" #include "src/utils/SkPatchUtils.h" #include "tools/ToolUtils.h" #include class SkReadBuffer; class FailImageFilter : public SkImageFilter_Base { public: static sk_sp Make() { return sk_sp(new FailImageFilter); } SK_FLATTENABLE_HOOKS(FailImageFilter) protected: FailImageFilter() : INHERITED(nullptr, 0, nullptr) {} sk_sp onFilterImage(const Context&, SkIPoint* offset) const override { return nullptr; } private: using INHERITED = SkImageFilter_Base; }; sk_sp FailImageFilter::CreateProc(SkReadBuffer& buffer) { SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 0); return FailImageFilter::Make(); } class IdentityImageFilter : public SkImageFilter_Base { public: static sk_sp Make(sk_sp input) { return sk_sp(new IdentityImageFilter(std::move(input))); } SK_FLATTENABLE_HOOKS(IdentityImageFilter) protected: sk_sp onFilterImage(const Context& ctx, SkIPoint* offset) const override { offset->set(0, 0); return sk_ref_sp(ctx.sourceImage()); } private: IdentityImageFilter(sk_sp input) : INHERITED(&input, 1, nullptr) {} using INHERITED = SkImageFilter_Base; }; // Register these image filters as deserializable before main(). namespace { static struct Initializer { Initializer() { SK_REGISTER_FLATTENABLE(IdentityImageFilter); SK_REGISTER_FLATTENABLE(FailImageFilter); } } initializer; } // namespace sk_sp IdentityImageFilter::CreateProc(SkReadBuffer& buffer) { SK_IMAGEFILTER_UNFLATTEN_COMMON(common, 1); return IdentityImageFilter::Make(common.getInput(0)); } /////////////////////////////////////////////////////////////////////////////// static void draw_paint(SkCanvas* canvas, SkImage*, const SkRect& r, sk_sp imf) { SkPaint paint; paint.setImageFilter(std::move(imf)); paint.setColor(SK_ColorGREEN); canvas->save(); canvas->clipRect(r); canvas->drawPaint(paint); canvas->restore(); } static void draw_line(SkCanvas* canvas, SkImage*, const SkRect& r, sk_sp imf) { SkPaint paint; paint.setColor(SK_ColorBLUE); paint.setImageFilter(imf); paint.setStrokeWidth(r.width()/10); canvas->drawLine(r.fLeft, r.fTop, r.fRight, r.fBottom, paint); } static void draw_rect(SkCanvas* canvas, SkImage*, const SkRect& r, sk_sp imf) { SkPaint paint; paint.setColor(SK_ColorYELLOW); paint.setImageFilter(imf); SkRect rr(r); rr.inset(r.width()/10, r.height()/10); canvas->drawRect(rr, paint); } static void draw_path(SkCanvas* canvas, SkImage*, const SkRect& r, sk_sp imf) { SkPaint paint; paint.setColor(SK_ColorMAGENTA); paint.setImageFilter(imf); paint.setAntiAlias(true); canvas->drawCircle(r.centerX(), r.centerY(), r.width()*2/5, paint); } static void draw_text(SkCanvas* canvas, SkImage*, const SkRect& r, sk_sp imf) { SkPaint paint; paint.setImageFilter(imf); paint.setColor(SK_ColorCYAN); SkFont font(ToolUtils::create_portable_typeface(), r.height() / 2); SkTextUtils::DrawString(canvas, "Text", r.centerX(), r.centerY(), font, paint, SkTextUtils::kCenter_Align); } static void draw_bitmap(SkCanvas* canvas, SkImage* i, const SkRect& r, sk_sp imf) { SkPaint paint; paint.setImageFilter(std::move(imf)); SkIRect bounds; r.roundOut(&bounds); SkBitmap bm; bm.allocN32Pixels(bounds.width(), bounds.height()); bm.eraseColor(SK_ColorTRANSPARENT); SkCanvas c(bm); draw_path(&c, i, r, nullptr); canvas->drawBitmap(bm, 0, 0, &paint); } static void draw_patch(SkCanvas* canvas, SkImage*, const SkRect& r, sk_sp imf) { SkPaint paint; paint.setImageFilter(std::move(imf)); // The order of the colors and points is clockwise starting at upper-left corner. static constexpr SkPoint gCubics[SkPatchUtils::kNumCtrlPts] = { //top points {100,100},{150,50},{250,150},{300,100}, //right points {250,150},{350,250}, //bottom points {300,300},{250,250},{150,350},{100,300}, //left points {50,250},{150,150} }; static constexpr SkColor colors[SkPatchUtils::kNumCorners] = { SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorCYAN }; SkAutoCanvasRestore acr(canvas, /*doSave=*/true); canvas->translate(-r.fLeft, -r.fTop); canvas->scale(r.width() / 400.0, r.height() / 400.0); canvas->drawPatch(gCubics, colors, /*texCoords=*/nullptr, SkBlendMode::kSrc, paint); } static void draw_atlas(SkCanvas* canvas, SkImage* atlas, const SkRect& r, sk_sp imf) { const SkScalar rad = SkDegreesToRadians(15.0f); SkRSXform xform = SkRSXform::Make(SkScalarCos(rad), SkScalarSin(rad), r.width() * 0.15f, 0); SkPaint paint; paint.setImageFilter(std::move(imf)); paint.setAntiAlias(true); SkSamplingOptions sampling({1.0f/3, 1.0f/3}); canvas->drawAtlas(atlas, &xform, &r, /*colors=*/nullptr, /*count=*/1, SkBlendMode::kSrc, sampling, /*cullRect=*/nullptr, &paint); } /////////////////////////////////////////////////////////////////////////////// class ImageFiltersBaseGM : public skiagm::GM { public: ImageFiltersBaseGM () {} protected: SkString onShortName() override { return SkString("imagefiltersbase"); } SkISize onISize() override { return SkISize::Make(700, 500); } void draw_frame(SkCanvas* canvas, const SkRect& r) { SkPaint paint; paint.setStyle(SkPaint::kStroke_Style); paint.setColor(SK_ColorRED); canvas->drawRect(r, paint); } void onDraw(SkCanvas* canvas) override { if (fAtlas == nullptr) { fAtlas = create_atlas_image(canvas); } void (*drawProc[])(SkCanvas*, SkImage*, const SkRect&, sk_sp) = { draw_paint, draw_line, draw_rect, draw_path, draw_text, draw_bitmap, draw_patch, draw_atlas }; auto cf = SkColorFilters::Blend(SK_ColorRED, SkBlendMode::kSrcIn); sk_sp filters[] = { nullptr, IdentityImageFilter::Make(nullptr), FailImageFilter::Make(), SkImageFilters::ColorFilter(std::move(cf), nullptr), // The strange 0.29 value tickles an edge case where crop rect calculates // a small border, but the blur really needs no border. This tickles // an msan uninitialized value bug. SkImageFilters::Blur(12.0f, 0.29f, nullptr), SkImageFilters::DropShadow(10.0f, 5.0f, 3.0f, 3.0f, SK_ColorBLUE, nullptr), }; SkRect r = SkRect::MakeWH(SkIntToScalar(64), SkIntToScalar(64)); SkScalar MARGIN = SkIntToScalar(16); SkScalar DX = r.width() + MARGIN; SkScalar DY = r.height() + MARGIN; canvas->translate(MARGIN, MARGIN); for (size_t i = 0; i < SK_ARRAY_COUNT(drawProc); ++i) { canvas->save(); for (size_t j = 0; j < SK_ARRAY_COUNT(filters); ++j) { drawProc[i](canvas, fAtlas.get(), r, filters[j]); draw_frame(canvas, r); canvas->translate(0, DY); } canvas->restore(); canvas->translate(DX, 0); } } private: static sk_sp create_atlas_image(SkCanvas* canvas) { static constexpr SkSize kSize = {64, 64}; SkImageInfo atlasInfo = SkImageInfo::MakeN32Premul(kSize.fWidth, kSize.fHeight); sk_sp atlasSurface(ToolUtils::makeSurface(canvas, atlasInfo)); SkCanvas* atlasCanvas = atlasSurface->getCanvas(); SkPaint atlasPaint; atlasPaint.setColor(SK_ColorGRAY); SkFont font(ToolUtils::create_portable_typeface(), kSize.fHeight * 0.4f); SkTextUtils::DrawString(atlasCanvas, "Atlas", kSize.fWidth * 0.5f, kSize.fHeight * 0.5f, font, atlasPaint, SkTextUtils::kCenter_Align); return atlasSurface->makeImageSnapshot(); } sk_sp fAtlas; using INHERITED = GM; }; DEF_GM( return new ImageFiltersBaseGM; ) /////////////////////////////////////////////////////////////////////////////// /* * Want to test combos of filter and LCD text, to be sure we disable LCD in the presence of * a filter. */ class ImageFiltersTextBaseGM : public skiagm::GM { SkString fSuffix; public: ImageFiltersTextBaseGM(const char suffix[]) : fSuffix(suffix) {} protected: SkString onShortName() override { SkString name; name.printf("%s_%s", "textfilter", fSuffix.c_str()); return name; } SkISize onISize() override { return SkISize::Make(512, 342); } void drawWaterfall(SkCanvas* canvas, const SkPaint& paint) { static const SkFont::Edging kEdgings[3] = { SkFont::Edging::kAlias, SkFont::Edging::kAntiAlias, SkFont::Edging::kSubpixelAntiAlias, }; SkFont font(ToolUtils::create_portable_typeface(), 30); SkAutoCanvasRestore acr(canvas, true); for (SkFont::Edging edging : kEdgings) { font.setEdging(edging); canvas->drawString("Hamburgefon", 0, 0, font, paint); canvas->translate(0, 40); } } virtual void installFilter(SkPaint* paint) = 0; void onDraw(SkCanvas* canvas) override { SkPaint paint; canvas->translate(20, 40); for (int doSaveLayer = 0; doSaveLayer <= 1; ++doSaveLayer) { SkAutoCanvasRestore acr(canvas, true); for (int useFilter = 0; useFilter <= 1; ++useFilter) { SkAutoCanvasRestore acr2(canvas, true); SkPaint paint; if (useFilter) { this->installFilter(&paint); } if (doSaveLayer) { canvas->saveLayer(nullptr, &paint); paint.setImageFilter(nullptr); } this->drawWaterfall(canvas, paint); acr2.restore(); canvas->translate(250, 0); } acr.restore(); canvas->translate(0, 200); } } private: using INHERITED = GM; }; class ImageFiltersText_IF : public ImageFiltersTextBaseGM { public: ImageFiltersText_IF() : ImageFiltersTextBaseGM("image") {} void installFilter(SkPaint* paint) override { paint->setImageFilter(SkImageFilters::Blur(1.5f, 1.5f, nullptr)); } }; DEF_GM( return new ImageFiltersText_IF; ) class ImageFiltersText_CF : public ImageFiltersTextBaseGM { public: ImageFiltersText_CF() : ImageFiltersTextBaseGM("color") {} void installFilter(SkPaint* paint) override { paint->setColorFilter(SkColorFilters::Blend(SK_ColorBLUE, SkBlendMode::kSrcIn)); } }; DEF_GM( return new ImageFiltersText_CF; )