Flutter Engine
The Flutter Engine
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Darken.cpp
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1// Copyright 2019 Google LLC.
2// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
4// HASH=23c974d2759f523ca2f4a78ae86855c3
5REG_FIDDLE(Darken, 256, 256, false, 3) {
6void draw(SkCanvas* canvas) {
7 canvas->drawImage(image, 0, 0);
8 SkColor colors[] = { SK_ColorWHITE, SK_ColorBLACK };
9 SkPoint horz[] = { { 0, 0 }, { 256, 0 } };
11 paint.setShader(SkGradientShader::MakeLinear(horz, colors, nullptr, std::size(colors),
13 paint.setBlendMode(SkBlendMode::kDarken);
14 canvas->drawPaint(paint);
15}
16} // END FIDDLE
@ kDarken
rc = s + d - max(s*da, d*sa), ra = kSrcOver
uint32_t SkColor
Definition SkColor.h:37
constexpr SkColor SK_ColorBLACK
Definition SkColor.h:103
constexpr SkColor SK_ColorWHITE
Definition SkColor.h:122
static void draw(SkCanvas *canvas, SkRect &target, int x, int y)
Definition aaclip.cpp:27
void drawPaint(const SkPaint &paint)
void drawImage(const SkImage *image, SkScalar left, SkScalar top)
Definition SkCanvas.h:1528
static sk_sp< SkShader > MakeLinear(const SkPoint pts[2], const SkColor colors[], const SkScalar pos[], int count, SkTileMode mode, uint32_t flags=0, const SkMatrix *localMatrix=nullptr)
const Paint & paint
sk_sp< SkImage > image
Definition examples.cpp:29
#define REG_FIDDLE(NAME, W, H, TEXT, I)
Definition examples.h:60