/* * Copyright 2013 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/SkColor.h" #include "include/core/SkFilterQuality.h" #include "include/core/SkMatrix.h" #include "include/core/SkPaint.h" #include "include/core/SkRect.h" #include "include/core/SkScalar.h" #include "include/core/SkShader.h" #include "include/core/SkSize.h" #include "include/core/SkString.h" #include "include/core/SkTileMode.h" #include "include/core/SkTypes.h" namespace { // This GM draws a 3x3 grid (with the center element excluded) of rectangles // filled with a bitmap shader. The bitmap shader is transformed so that the // pattern cell is at the center (excluded) region. // // In Repeat and Mirror mode, this tests that the bitmap shader still draws // even though the pattern cell is outside the clip. // // In Clamp mode, this tests that the clamp is handled properly. For PDF, // (and possibly other exported formats) this also "tests" that the image itself // is not stored (well, you'll need to open it up with an external tool to // verify that). static SkBitmap create_bitmap() { SkBitmap bmp; bmp.allocN32Pixels(2, 2); uint32_t* pixels = reinterpret_cast<uint32_t*>(bmp.getPixels()); pixels[0] = SkPreMultiplyColor(SK_ColorRED); pixels[1] = SkPreMultiplyColor(SK_ColorGREEN); pixels[2] = SkPreMultiplyColor(SK_ColorBLACK); pixels[3] = SkPreMultiplyColor(SK_ColorBLUE); return bmp; } constexpr SkScalar RECT_SIZE = 64; constexpr SkScalar SLIDE_SIZE = 300; class ClippedBitmapShadersGM : public skiagm::GM { public: ClippedBitmapShadersGM(SkTileMode mode, bool hq=false) : fMode(mode), fHQ(hq) { } protected: SkTileMode fMode; bool fHQ; SkString onShortName() override { SkString descriptor; switch (fMode) { case SkTileMode::kRepeat: descriptor = "tile"; break; case SkTileMode::kMirror: descriptor = "mirror"; break; case SkTileMode::kClamp: descriptor = "clamp"; break; case SkTileMode::kDecal: descriptor = "decal"; break; } descriptor.prepend("clipped-bitmap-shaders-"); if (fHQ) { descriptor.append("-hq"); } return descriptor; } SkISize onISize() override { return {300, 300}; } void onDraw(SkCanvas* canvas) override { SkBitmap bmp = create_bitmap(); SkMatrix s; s.reset(); s.setScale(8, 8); s.postTranslate(SLIDE_SIZE / 2, SLIDE_SIZE / 2); SkPaint paint; paint.setShader(bmp.makeShader(fMode, fMode, fHQ ? SkSamplingOptions(SkCubicResampler::Mitchell()) : SkSamplingOptions(), s)); SkScalar margin = (SLIDE_SIZE / 3 - RECT_SIZE) / 2; for (int i = 0; i < 3; i++) { SkScalar yOrigin = SLIDE_SIZE / 3 * i + margin; for (int j = 0; j < 3; j++) { SkScalar xOrigin = SLIDE_SIZE / 3 * j + margin; if (i == 1 && j == 1) { continue; // skip center element } SkRect rect = SkRect::MakeXYWH(xOrigin, yOrigin, RECT_SIZE, RECT_SIZE); canvas->save(); canvas->clipRect(rect); canvas->drawRect(rect, paint); canvas->restore(); } } } private: using INHERITED = GM; }; } // namespace DEF_GM( return new ClippedBitmapShadersGM(SkTileMode::kRepeat); ) DEF_GM( return new ClippedBitmapShadersGM(SkTileMode::kMirror); ) DEF_GM( return new ClippedBitmapShadersGM(SkTileMode::kClamp); ) DEF_GM( return new ClippedBitmapShadersGM(SkTileMode::kRepeat, true); ) DEF_GM( return new ClippedBitmapShadersGM(SkTileMode::kMirror, true); ) DEF_GM( return new ClippedBitmapShadersGM(SkTileMode::kClamp, true); )