| /* |
| * 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 "include/core/SkCanvas.h" |
| #include "include/core/SkPaint.h" |
| #include "include/core/SkShader.h" |
| #include "src/base/SkRandom.h" |
| #include "tools/viewer/Slide.h" |
| |
| /** |
| * Animated sample used to develop a predecessor of GrDrawOp combining. |
| */ |
| class ManyRectsSlide : public Slide { |
| private: |
| enum { |
| N = 1000, |
| }; |
| |
| public: |
| ManyRectsSlide() { fName = "ManyRects"; } |
| |
| void draw(SkCanvas* canvas) override { |
| SkISize dsize = canvas->getBaseLayerSize(); |
| canvas->clear(0xFFF0E0F0); |
| |
| for (int i = 0; i < N; ++i) { |
| SkRect rect = SkRect::MakeWH(SkIntToScalar(fRandom.nextRangeU(10, 100)), |
| SkIntToScalar(fRandom.nextRangeU(10, 100))); |
| int x = fRandom.nextRangeU(0, dsize.fWidth); |
| int y = fRandom.nextRangeU(0, dsize.fHeight); |
| canvas->save(); |
| |
| canvas->translate(SkIntToScalar(x), SkIntToScalar(y)); |
| // Uncomment to test rotated rect draw combining. |
| if ((false)) { |
| SkMatrix rotate; |
| rotate.setRotate(fRandom.nextUScalar1() * 360, |
| SkIntToScalar(x) + SkScalarHalf(rect.fRight), |
| SkIntToScalar(y) + SkScalarHalf(rect.fBottom)); |
| canvas->concat(rotate); |
| } |
| SkRect clipRect = rect; |
| // This clip will always contain the entire rect. It's here to give the GPU op combining |
| // code a little more challenge. |
| clipRect.outset(10, 10); |
| canvas->clipRect(clipRect); |
| SkPaint paint; |
| paint.setColor(fRandom.nextU()); |
| canvas->drawRect(rect, paint); |
| canvas->restore(); |
| } |
| } |
| |
| private: |
| SkRandom fRandom; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| DEF_SLIDE(return new ManyRectsSlide();) |