36 lines
1.3 KiB
C++
36 lines
1.3 KiB
C++
|
// 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(UnpremulGPU, 256, 256, false, 6) {
|
||
|
|
void draw(SkCanvas* canvas) {
|
||
|
|
canvas->clear(0xffa020a0);
|
||
|
|
SkImageInfo premulInfo = SkImageInfo::MakeS32(10, 10, kPremul_SkAlphaType);
|
||
|
|
SkBitmap premulBitmap;
|
||
|
|
premulBitmap.allocPixels(premulInfo);
|
||
|
|
for (int y = 0; y < 10; y++) {
|
||
|
|
for (int x = 0; x < 10; x++) {
|
||
|
|
*(premulBitmap.getAddr32(x, y)) = 0x80808080;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
sk_sp<SkImage> premulImage = SkImage::MakeFromBitmap(premulBitmap);
|
||
|
|
|
||
|
|
SkImageInfo unpremulInfo = premulInfo.makeAlphaType(kUnpremul_SkAlphaType);
|
||
|
|
SkBitmap unpremulBitmap;
|
||
|
|
unpremulBitmap.allocPixels(unpremulInfo);
|
||
|
|
for (int y = 0; y < 10; y++) {
|
||
|
|
for (int x = 0; x < 10; x++) {
|
||
|
|
*(unpremulBitmap.getAddr32(x, y)) = 0x80FFFFFF;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
sk_sp<SkImage> unpremulImage = SkImage::MakeFromBitmap(unpremulBitmap);
|
||
|
|
|
||
|
|
SkPaint paint;
|
||
|
|
const SkTileMode tile = SkTileMode::kRepeat;
|
||
|
|
paint.setShader(premulImage->makeShader(tile, tile, nullptr));
|
||
|
|
canvas->drawCircle(10.0f, 10.0f, 10.0f, paint);
|
||
|
|
|
||
|
|
paint.setShader(unpremulImage->makeShader(tile, tile, nullptr));
|
||
|
|
canvas->drawCircle(10.0f, 35.0f, 10.0f, paint);
|
||
|
|
}
|
||
|
|
} // END FIDDLE
|