blob: 16a899af0e480672bcb9803e2f7ed74a896b8377 [file] [log] [blame]
// Copyright 2020 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"
REG_FIDDLE(alphaimage_shader_colorfilter, 256, 256, false, 0) {
sk_sp<SkImage> alpha_image() {
auto s = SkSurface::MakeRaster(SkImageInfo::MakeA8(64, 64));
s->getCanvas()->clear(SkColorSetARGB(0x80, 0x00, 0x00, 0x00));
return s->makeImageSnapshot();
}
sk_sp<SkShader> linear_gradient() {
SkPoint gpts[2] = {{0, 0}, {64, 64}};
SkColor gc[3] = {SK_ColorRED, SK_ColorGREEN, SK_ColorMAGENTA};
return SkGradientShader::MakeLinear(gpts, gc, nullptr, 3, (SkTileMode)0);
}
sk_sp<SkColorFilter> color_filter() {
SkScalar colorMatrix[20] = {
1, 0, 0, 0, 0,
0, 0, 1, 0, 0,
0, 1, 0, 0, 0,
0, 0, 0, 1, 0};
return SkColorFilters::Matrix(colorMatrix);
}
void draw(SkCanvas* canvas) {
SkPaint p;
p.setShader(linear_gradient());
p.setColorFilter(color_filter());
auto i = alpha_image();
canvas->scale(2, 2);
canvas->drawImage(i.get(), 32, 32, SkSamplingOptions(), &p);
}
} // END FIDDLE