| /* |
| * 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/SkFont.h" |
| #include "include/core/SkImageFilter.h" |
| #include "include/core/SkPaint.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 "tools/ToolUtils.h" |
| #include "tools/fonts/FontToolUtils.h" |
| |
| #include <utility> |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| static void draw_paint(SkCanvas* canvas, const SkRect& r, sk_sp<SkImageFilter> imf) { |
| SkPaint paint; |
| paint.setImageFilter(std::move(imf)); |
| paint.setColor(SK_ColorBLACK); |
| canvas->save(); |
| canvas->clipRect(r); |
| canvas->drawPaint(paint); |
| canvas->restore(); |
| } |
| |
| static void draw_path(SkCanvas* canvas, const SkRect& r, sk_sp<SkImageFilter> imf) { |
| SkPaint paint; |
| paint.setColor(SK_ColorMAGENTA); |
| paint.setImageFilter(std::move(imf)); |
| paint.setAntiAlias(true); |
| canvas->drawCircle(r.centerX(), r.centerY(), r.width()*2/5, paint); |
| } |
| |
| static void draw_text(SkCanvas* canvas, const SkRect& r, sk_sp<SkImageFilter> imf) { |
| SkPaint paint; |
| paint.setImageFilter(std::move(imf)); |
| paint.setColor(SK_ColorGREEN); |
| |
| SkFont font(ToolUtils::DefaultPortableTypeface(), r.height() / 2); |
| SkTextUtils::DrawString(canvas, "Text", r.centerX(), r.centerY(), font, paint, SkTextUtils::kCenter_Align); |
| } |
| |
| static void draw_bitmap(SkCanvas* canvas, const SkRect& r, sk_sp<SkImageFilter> imf) { |
| SkPaint paint; |
| |
| SkIRect bounds; |
| r.roundOut(&bounds); |
| |
| auto surf = SkSurfaces::Raster(SkImageInfo::MakeN32Premul(bounds.width(), bounds.height())); |
| draw_path(surf->getCanvas(), r, nullptr); |
| |
| paint.setImageFilter(std::move(imf)); |
| surf->draw(canvas, 0, 0, SkSamplingOptions(), &paint); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| class ImageFiltersCroppedGM : public skiagm::GM { |
| public: |
| ImageFiltersCroppedGM () {} |
| |
| protected: |
| SkString getName() const override { return SkString("imagefilterscropped"); } |
| |
| SkISize getISize() override { return SkISize::Make(400, 960); } |
| |
| void make_checkerboard() { |
| auto surf = SkSurfaces::Raster(SkImageInfo::MakeN32Premul(80, 80)); |
| auto canvas = surf->getCanvas(); |
| SkPaint darkPaint; |
| darkPaint.setColor(0xFF404040); |
| SkPaint lightPaint; |
| lightPaint.setColor(0xFFA0A0A0); |
| for (int y = 0; y < 80; y += 16) { |
| for (int x = 0; x < 80; x += 16) { |
| canvas->save(); |
| canvas->translate(SkIntToScalar(x), SkIntToScalar(y)); |
| canvas->drawRect(SkRect::MakeXYWH(0, 0, 8, 8), darkPaint); |
| canvas->drawRect(SkRect::MakeXYWH(8, 0, 8, 8), lightPaint); |
| canvas->drawRect(SkRect::MakeXYWH(0, 8, 8, 8), lightPaint); |
| canvas->drawRect(SkRect::MakeXYWH(8, 8, 8, 8), darkPaint); |
| canvas->restore(); |
| } |
| } |
| fCheckerboard = surf->makeImageSnapshot(); |
| } |
| |
| void draw_frame(SkCanvas* canvas, const SkRect& r) { |
| SkPaint paint; |
| paint.setStyle(SkPaint::kStroke_Style); |
| paint.setColor(SK_ColorRED); |
| canvas->drawRect(r, paint); |
| } |
| |
| void onOnceBeforeDraw() override { |
| make_checkerboard(); |
| } |
| |
| void onDraw(SkCanvas* canvas) override { |
| void (*drawProc[])(SkCanvas*, const SkRect&, sk_sp<SkImageFilter>) = { |
| draw_bitmap, draw_path, draw_paint, draw_text |
| }; |
| |
| sk_sp<SkColorFilter> cf(SkColorFilters::Blend(SK_ColorBLUE, |
| SkBlendMode::kSrcIn)); |
| SkIRect cropRect = SkIRect::MakeXYWH(10, 10, 44, 44); |
| SkIRect bogusRect = SkIRect::MakeXYWH(-100, -100, 10, 10); |
| |
| sk_sp<SkImageFilter> offset(SkImageFilters::Offset(-10, -10, nullptr)); |
| |
| sk_sp<SkImageFilter> cfOffset(SkImageFilters::ColorFilter(cf, std::move(offset))); |
| |
| // These are composed with an outer erode along the other axis, so don't add a cropRect to |
| // them or it will interfere with the second filter evaluation. |
| sk_sp<SkImageFilter> erodeX(SkImageFilters::Erode(8, 0, nullptr)); |
| sk_sp<SkImageFilter> erodeY(SkImageFilters::Erode(0, 8, nullptr)); |
| |
| sk_sp<SkImageFilter> filters[] = { |
| nullptr, |
| SkImageFilters::ColorFilter(cf, nullptr, &cropRect), |
| SkImageFilters::Blur(0.0f, 0.0f, nullptr, &cropRect), |
| SkImageFilters::Blur(1.0f, 1.0f, nullptr, &cropRect), |
| SkImageFilters::Blur(8.0f, 0.0f, nullptr, &cropRect), |
| SkImageFilters::Blur(0.0f, 8.0f, nullptr, &cropRect), |
| SkImageFilters::Blur(8.0f, 8.0f, nullptr, &cropRect), |
| SkImageFilters::Erode(1, 1, nullptr, &cropRect), |
| SkImageFilters::Erode(8, 0, std::move(erodeY), &cropRect), |
| SkImageFilters::Erode(0, 8, std::move(erodeX), &cropRect), |
| SkImageFilters::Erode(8, 8, nullptr, &cropRect), |
| SkImageFilters::Merge(nullptr, std::move(cfOffset), &cropRect), |
| SkImageFilters::Blur(8.0f, 8.0f, nullptr, &bogusRect), |
| SkImageFilters::ColorFilter(cf, nullptr, &bogusRect), |
| }; |
| |
| 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 j = 0; j < std::size(drawProc); ++j) { |
| canvas->save(); |
| for (size_t i = 0; i < std::size(filters); ++i) { |
| SkPaint paint; |
| canvas->drawImage(fCheckerboard, 0, 0); |
| drawProc[j](canvas, r, filters[i]); |
| canvas->translate(0, DY); |
| } |
| canvas->restore(); |
| canvas->translate(DX, 0); |
| } |
| } |
| |
| private: |
| sk_sp<SkImage> fCheckerboard; |
| using INHERITED = GM; |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| DEF_GM( return new ImageFiltersCroppedGM; ) |