aosp12/external/skia/docs/examples/Difference.cpp

22 lines
896 B
C++

// Copyright 2019 Google LLC.
// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
#include "tools/fiddle/examples.h"
// HASH=52d2c8d1b9b428de4477b4caa1543a3d
REG_FIDDLE(Difference, 256, 256, false, 5) {
void draw(SkCanvas* canvas) {
canvas->drawImage(image, 0, 0);
canvas->drawImage(image, 128, 0);
canvas->drawImage(image, 0, 128);
canvas->drawImage(image, 128, 128);
SkPaint 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(0x80bb9977, SkBlendMode::kDifference);
}
} // END FIDDLE