24 lines
1.1 KiB
C++
24 lines
1.1 KiB
C++
// Copyright 2019 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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// HASH=e9f70cbc9827097449a386ec7a8a8188
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REG_FIDDLE(Bitmap_readPixels_2, 256, 256, false, 3) {
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void draw(SkCanvas* canvas) {
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std::vector<int32_t> srcPixels;
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srcPixels.resize(source.height() * source.rowBytes());
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for (int y = 0; y < 4; ++y) {
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for (int x = 0; x < 4; ++x) {
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SkPixmap pixmap(SkImageInfo::MakeN32Premul(source.width() / 4, source.height() / 4),
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&srcPixels.front() + x * source.height() * source.width() / 4 +
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y * source.width() / 4, source.rowBytes());
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source.readPixels(pixmap, x * source.width() / 4, y * source.height() / 4);
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}
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}
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canvas->scale(.5f, .5f);
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SkBitmap bitmap;
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bitmap.installPixels(SkImageInfo::MakeN32Premul(source.width(), source.height()),
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&srcPixels.front(), source.rowBytes());
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canvas->drawImage(bitmap.asImage(), 0, 0);
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}
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} // END FIDDLE
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