| /* |
| * 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/gm.h" |
| #include "include/core/SkBitmap.h" |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkFont.h" |
| #include "include/core/SkImageFilter.h" |
| #include "include/core/SkPaint.h" |
| #include "include/core/SkRect.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 "tools/ToolUtils.h" |
| |
| #define WIDTH 700 |
| #define HEIGHT 560 |
| |
| namespace skiagm { |
| |
| class MorphologyGM : public GM { |
| public: |
| MorphologyGM() { |
| this->setBGColor(0xFF000000); |
| } |
| |
| protected: |
| SkString onShortName() override { |
| return SkString("morphology"); |
| } |
| |
| void onOnceBeforeDraw() override { |
| auto surf = SkSurface::MakeRasterN32Premul(135, 135); |
| |
| SkFont font(ToolUtils::create_portable_typeface(), 64.0f); |
| SkPaint paint; |
| paint.setColor(0xFFFFFFFF); |
| surf->getCanvas()->drawString("ABC", 10, 55, font, paint); |
| surf->getCanvas()->drawString("XYZ", 10, 110, font, paint); |
| |
| fImage = surf->makeImageSnapshot(); |
| } |
| |
| SkISize onISize() override { |
| return SkISize::Make(WIDTH, HEIGHT); |
| } |
| |
| void drawClippedBitmap(SkCanvas* canvas, const SkPaint& paint, int x, int y) { |
| canvas->save(); |
| canvas->translate(SkIntToScalar(x), SkIntToScalar(y)); |
| canvas->clipIRect(fImage->bounds()); |
| canvas->drawImage(fImage, 0, 0, SkSamplingOptions(), &paint); |
| canvas->restore(); |
| } |
| |
| void onDraw(SkCanvas* canvas) override { |
| struct { |
| int fWidth, fHeight; |
| int fRadiusX, fRadiusY; |
| } samples[] = { |
| { 140, 140, 0, 0 }, |
| { 140, 140, 0, 2 }, |
| { 140, 140, 2, 0 }, |
| { 140, 140, 2, 2 }, |
| { 24, 24, 25, 25 }, |
| }; |
| SkPaint paint; |
| SkIRect cropRect = SkIRect::MakeXYWH(25, 20, 100, 80); |
| |
| for (unsigned j = 0; j < 4; ++j) { |
| for (unsigned i = 0; i < std::size(samples); ++i) { |
| const SkIRect* cr = j & 0x02 ? &cropRect : nullptr; |
| if (j & 0x01) { |
| paint.setImageFilter(SkImageFilters::Erode( |
| samples[i].fRadiusX, samples[i].fRadiusY, nullptr, cr)); |
| } else { |
| paint.setImageFilter(SkImageFilters::Dilate( |
| samples[i].fRadiusX, samples[i].fRadiusY, nullptr, cr)); |
| } |
| this->drawClippedBitmap(canvas, paint, i * 140, j * 140); |
| } |
| } |
| } |
| |
| private: |
| sk_sp<SkImage> fImage; |
| |
| using INHERITED = GM; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| DEF_GM(return new MorphologyGM;) |
| |
| } // namespace skiagm |