зеркало из https://github.com/mozilla/moz-skia.git
114 строки
3.7 KiB
C++
114 строки
3.7 KiB
C++
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/*
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* Copyright 2011 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "Test.h"
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#include "SkCanvas.h"
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#include "SkConfig8888.h"
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#include "SkDevice.h"
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#if SK_SUPPORT_GPU
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#include "SkGpuDevice.h"
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#endif
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namespace {
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void fillCanvas(SkCanvas* canvas, SkCanvas::Config8888 unpremulConfig) {
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SkBitmap bmp;
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bmp.setConfig(SkBitmap::kARGB_8888_Config, 256, 256);
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bmp.allocPixels();
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SkAutoLockPixels alp(bmp);
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uint32_t* pixels = reinterpret_cast<uint32_t*>(bmp.getPixels());
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for (int a = 0; a < 256; ++a) {
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for (int r = 0; r < 256; ++r) {
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pixels[a * 256 + r] = SkPackConfig8888(unpremulConfig, a, r, 0, 0);
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}
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}
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canvas->writePixels(bmp, 0, 0, unpremulConfig);
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}
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static const SkCanvas::Config8888 gUnpremulConfigs[] = {
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SkCanvas::kNative_Unpremul_Config8888,
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/**
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* There is a bug in Ganesh (http://code.google.com/p/skia/issues/detail?id=438)
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* that causes the readback of pixels from BGRA canvas to an RGBA bitmap to
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* fail. This should be removed as soon as the issue above is resolved.
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*/
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#if !defined(SK_BUILD_FOR_ANDROID)
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SkCanvas::kBGRA_Unpremul_Config8888,
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#endif
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SkCanvas::kRGBA_Unpremul_Config8888,
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};
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void PremulAlphaRoundTripTest(skiatest::Reporter* reporter,
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GrContext* context) {
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SkAutoTUnref<SkDevice> device;
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for (int dtype = 0; dtype < 2; ++dtype) {
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if (0 == dtype) {
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device.reset(new SkDevice(SkBitmap::kARGB_8888_Config,
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256,
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256,
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false));
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} else {
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#if !SK_SUPPORT_GPU || defined(SK_SCALAR_IS_FIXED)
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// GPU device known not to work in the fixed pt build.
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continue;
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#else
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device.reset(new SkGpuDevice(context,
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SkBitmap::kARGB_8888_Config,
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256,
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256));
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#endif
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}
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SkCanvas canvas(device);
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SkBitmap readBmp1;
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readBmp1.setConfig(SkBitmap::kARGB_8888_Config, 256, 256);
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readBmp1.allocPixels();
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SkBitmap readBmp2;
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readBmp2.setConfig(SkBitmap::kARGB_8888_Config, 256, 256);
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readBmp2.allocPixels();
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for (size_t upmaIdx = 0;
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upmaIdx < SK_ARRAY_COUNT(gUnpremulConfigs);
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++upmaIdx) {
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fillCanvas(&canvas, gUnpremulConfigs[upmaIdx]);
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{
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SkAutoLockPixels alp1(readBmp1);
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SkAutoLockPixels alp2(readBmp2);
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sk_bzero(readBmp1.getPixels(), readBmp1.getSafeSize());
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sk_bzero(readBmp2.getPixels(), readBmp2.getSafeSize());
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}
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canvas.readPixels(&readBmp1, 0, 0, gUnpremulConfigs[upmaIdx]);
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canvas.writePixels(readBmp1, 0, 0, gUnpremulConfigs[upmaIdx]);
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canvas.readPixels(&readBmp2, 0, 0, gUnpremulConfigs[upmaIdx]);
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SkAutoLockPixels alp1(readBmp1);
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SkAutoLockPixels alp2(readBmp2);
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uint32_t* pixels1 =
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reinterpret_cast<uint32_t*>(readBmp1.getPixels());
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uint32_t* pixels2 =
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reinterpret_cast<uint32_t*>(readBmp2.getPixels());
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bool success = true;
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for (int y = 0; y < 256 && success; ++y) {
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for (int x = 0; x < 256 && success; ++x) {
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int i = y * 256 + x;
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REPORTER_ASSERT(reporter, success = pixels1[i] == pixels2[i]);
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}
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}
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}
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}
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}
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}
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#include "TestClassDef.h"
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DEFINE_GPUTESTCLASS("PremulAlphaRoundTripTest", PremulAlphaRoundTripTestClass, PremulAlphaRoundTripTest)
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