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- /*
- * 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, &s));
- if (fHQ) {
- paint.setFilterQuality(kHigh_SkFilterQuality);
- }
- 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:
- typedef GM INHERITED;
- };
- } // 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); )
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