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Skia Fiddle
Skia Version:
ad0b2b
void draw(SkCanvas* canvas) { SkColor colors[] = { SK_ColorRED, SK_ColorBLUE }; SkPoint horz[] = { { 0, 0 }, { 256, 0 } }; SkPaint paint; paint.setShader(SkGradientShader::MakeLinear(horz, colors, nullptr, SK_ARRAY_COUNT(colors), SkTileMode::kClamp)); canvas->drawPaint(paint); paint.setBlendMode(SkBlendMode::kDstATop); SkColor alphas[] = { SK_ColorBLACK, SK_ColorTRANSPARENT }; SkPoint vert[] = { { 0, 0 }, { 0, 256 } }; paint.setShader(SkGradientShader::MakeLinear(vert, alphas, nullptr, SK_ARRAY_COUNT(alphas), SkTileMode::kClamp)); canvas->drawPaint(paint); canvas->clipRect( { 30, 30, 226, 226 } ); canvas->drawColor(SkColorSetA(SK_ColorGREEN, 128), SkBlendMode::kOverlay); }
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