AuroraMiddleware/skia2
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linear gradient with stops discretized gm

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TBR=reed@google.com
BUG=skia:517

Review URL: https://codereview.chromium.org/1259983009
This commit is contained in:
caryclark 2015-07-30 12:35:48 -07:00 committed by Commit bot
parent 6d901da0ec
commit 159fa572c4
1 changed files with 43 additions and 0 deletions
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43
gm/gradients.cpp
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@ -490,4 +490,47 @@ private:
};
DEF_GM( return new RadialGradient4GM; )
class LinearGradientGM : public GM {
SkAutoTUnref<SkShader> fShader[100];
protected:
SkString onShortName() override { return SkString("linear_gradient"); }
const SkScalar kWidthBump = 30.f;
const SkScalar kHeight = 5.f;
const SkScalar kMinWidth = 540.f;
SkISize onISize() override { return SkISize::Make(500, 500); }
void onOnceBeforeDraw() override {
SkPoint pts[2] = { {0, 0}, {0, 0} };
const SkColor colors[] = { SK_ColorWHITE, SK_ColorWHITE, 0xFF008200, 0xFF008200,
SK_ColorWHITE, SK_ColorWHITE };
const SkScalar unitPos[] = { 0, 50, 70, 500, 540 };
SkScalar pos[6];
pos[5] = 1;
for (int index = 0; index < (int) SK_ARRAY_COUNT(fShader); ++index) {
pts[1].fX = 500.f + index * kWidthBump;
for (int inner = 0; inner < (int) SK_ARRAY_COUNT(unitPos); ++inner) {
pos[inner] = unitPos[inner] / (kMinWidth + index * kWidthBump);
}
fShader[index].reset(SkGradientShader::CreateLinear(pts, colors, pos,
SK_ARRAY_COUNT(gColors), SkShader::kClamp_TileMode));
}
}
void onDraw(SkCanvas* canvas) override {
SkPaint paint;
paint.setAntiAlias(true);
for (int index = 0; index < (int) SK_ARRAY_COUNT(fShader); ++index) {
paint.setShader(fShader[index]);
canvas->drawRect(SkRect::MakeLTRB(0, index * kHeight, kMinWidth + index * kWidthBump,
(index + 1) * kHeight), paint);
}
}
private:
typedef GM INHERITED;
};
DEF_GM( return new LinearGradientGM; )
}