5623d9e36f
Change-Id: I9569ba4760546be6302c24658e64cb58c7db86e5 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/550697 Reviewed-by: John Stiles <johnstiles@google.com> Commit-Queue: Herb Derby <herb@google.com>
32 lines
1.4 KiB
C++
32 lines
1.4 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=df4e355c4845350daede833b4fd21ec1
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REG_FIDDLE(Pixmap_readPixels, 256, 128, false, 0) {
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void draw(SkCanvas* canvas) {
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std::vector<int32_t> pixels;
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const int width = 256;
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const int height = 64;
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pixels.resize(height * width * 4);
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SkImageInfo srcInfo = SkImageInfo::MakeN32Premul(width, height);
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SkPixmap srcPixmap(srcInfo, (const void*) &pixels.front(), width * 4);
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SkColor gradColors[] = { 0xFFAA3300, 0x7F881122 };
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SkPoint gradPoints[] = { { 0, 0 }, { 256, 0 } };
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SkPaint paint;
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paint.setShader(SkGradientShader::MakeLinear(gradPoints, gradColors, nullptr,
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std::size(gradColors), SkTileMode::kClamp));
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SkBitmap bitmap;
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bitmap.installPixels(srcPixmap);
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SkCanvas srcCanvas(bitmap);
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srcCanvas.drawRect(SkRect::MakeWH(width, height), paint);
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canvas->drawImage(bitmap.asImage(), 0, 0);
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std::vector<int32_t> dstPixels;
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dstPixels.resize(height * width * 2);
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SkImageInfo dstInfo = srcInfo.makeColorType(kARGB_4444_SkColorType);
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srcPixmap.readPixels(dstInfo, &dstPixels.front(), width * 2);
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SkPixmap dstPixmap(dstInfo, &dstPixels.front(), width * 2);
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bitmap.installPixels(dstPixmap);
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canvas->drawImage(bitmap.asImage(), 0, 128);
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}
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} // END FIDDLE
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