| /* |
| * Copyright 2021 Google LLC. |
| * |
| * 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/SkCanvas.h" |
| #include "include/core/SkPaint.h" |
| #include "include/core/SkPath.h" |
| #include "include/gpu/GrContextOptions.h" |
| |
| namespace skiagm { |
| |
| class BatchedConvexPathsGM : public GM { |
| private: |
| SkString getName() const override { return SkString("batchedconvexpaths"); } |
| SkISize getISize() override { return SkISize::Make(512, 512); } |
| |
| void modifyGrContextOptions(GrContextOptions* ctxOptions) override { |
| // Ensure our paths don't go through the atlas path renderer. |
| ctxOptions->fGpuPathRenderers &= ~GpuPathRenderers::kAtlas; |
| } |
| |
| DrawResult onDraw(SkCanvas* canvas, SkString* errorMsg) override { |
| canvas->clear(SK_ColorBLACK); |
| for (uint32_t i = 0; i < 10; ++i) { |
| SkAutoCanvasRestore acr(canvas, true); |
| |
| int numPoints = (i + 3) * 3; |
| SkPath path; |
| path.moveTo(1, 0); |
| for (float j = 1; j < numPoints; j += 3) { |
| constexpr float k2PI = SK_ScalarPI * 2; |
| path.cubicTo(cosf(j/numPoints * k2PI), sinf(j/numPoints * k2PI), |
| cosf((j+1)/numPoints * k2PI), sinf((j+1)/numPoints * k2PI), |
| j+2 == numPoints ? 1 : cosf((j+2)/numPoints * k2PI), |
| j+2 == numPoints ? 0 : sinf((j+2)/numPoints * k2PI)); |
| } |
| float scale = 256 - i*24; |
| canvas->translate(scale + (256 - scale) * .33f, scale + (256 - scale) * .33f); |
| canvas->scale(scale, scale); |
| |
| SkPaint paint; |
| paint.setColor(((i + 123458383u) * 285018463u) | 0xff808080); |
| paint.setAlphaf(0.3f); |
| paint.setAntiAlias(true); |
| |
| canvas->drawPath(path, paint); |
| } |
| return DrawResult::kOk; |
| } |
| }; |
| |
| DEF_GM( return new BatchedConvexPathsGM; ) |
| |
| } // namespace skiagm |