33 lines
1.5 KiB
C++
33 lines
1.5 KiB
C++
// Copyright 2020 Google LLC.
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// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
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#include "tools/fiddle/examples.h"
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REG_FIDDLE_SRGB(gpu4444diff, 260, 260, false, 3, 0, false) {
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void draw(SkCanvas* canvas) {
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canvas->scale(16, 16);
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SkBitmap bitmap;
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SkImageInfo imageInfo = SkImageInfo::Make(2, 2, kARGB_4444_SkColorType, kPremul_SkAlphaType);
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bitmap.allocPixels(imageInfo);
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SkCanvas offscreen(bitmap);
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offscreen.clear(SK_ColorGREEN);
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canvas->drawImage(bitmap.asImage(), 0, 0);
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offscreen.clear(SK_ColorGRAY);
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canvas->drawImage(bitmap.asImage(), 2, 2);
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auto pack4444 = [](unsigned a, unsigned r, unsigned g, unsigned b) -> uint16_t {
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return (a << 0) | (b << 4) | (g << 8) | (r << 12);
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};
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uint16_t red4444[] = { pack4444(0xF, 0xF, 0x0, 0x0), pack4444(0xF, 0xb, 0x0, 0x0),
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pack4444(0xF, 0x9, 0x0, 0x0), pack4444(0xF, 0x5, 0x0, 0x0) };
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uint16_t blue4444[] = { pack4444(0xF, 0x0, 0x0, 0x0F), pack4444(0xF, 0x0, 0x0, 0x0b),
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pack4444(0xF, 0x0, 0x0, 0x09), pack4444(0xF, 0x0, 0x0, 0x05) };
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SkImageInfo pixInfo = SkImageInfo::Make(2, 2, kARGB_4444_SkColorType, kPremul_SkAlphaType);
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SkPixmap redPixmap(imageInfo, &red4444, 4);
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if (bitmap.writePixels(redPixmap, 0, 0)) {
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canvas->drawImage(bitmap.asImage(), 4, 4);
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}
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SkPixmap bluePixmap(imageInfo, &blue4444, 4);
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if (bitmap.writePixels(bluePixmap, 0, 0)) {
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canvas->drawImage(bitmap.asImage(), 6, 6);
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}
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}
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} // END FIDDLE
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