54 lines
1.8 KiB
C++
54 lines
1.8 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "gfxAlphaRecovery.h"
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#include "gfxImageSurface.h"
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#define MOZILLA_SSE_INCLUDE_HEADER_FOR_SSE2
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#include "mozilla/SSE.h"
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/* static */ bool
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gfxAlphaRecovery::RecoverAlpha(gfxImageSurface* blackSurf,
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const gfxImageSurface* whiteSurf)
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{
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mozilla::gfx::IntSize size = blackSurf->GetSize();
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if (size != whiteSurf->GetSize() ||
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(blackSurf->Format() != mozilla::gfx::SurfaceFormat::A8R8G8B8_UINT32 &&
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blackSurf->Format() != mozilla::gfx::SurfaceFormat::X8R8G8B8_UINT32) ||
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(whiteSurf->Format() != mozilla::gfx::SurfaceFormat::A8R8G8B8_UINT32 &&
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whiteSurf->Format() != mozilla::gfx::SurfaceFormat::X8R8G8B8_UINT32))
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return false;
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#ifdef MOZILLA_MAY_SUPPORT_SSE2
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if (mozilla::supports_sse2() &&
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RecoverAlphaSSE2(blackSurf, whiteSurf)) {
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return true;
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}
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#endif
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blackSurf->Flush();
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whiteSurf->Flush();
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unsigned char* blackData = blackSurf->Data();
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unsigned char* whiteData = whiteSurf->Data();
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for (int32_t i = 0; i < size.height; ++i) {
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uint32_t* blackPixel = reinterpret_cast<uint32_t*>(blackData);
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const uint32_t* whitePixel = reinterpret_cast<uint32_t*>(whiteData);
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for (int32_t j = 0; j < size.width; ++j) {
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uint32_t recovered = RecoverPixel(blackPixel[j], whitePixel[j]);
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blackPixel[j] = recovered;
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}
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blackData += blackSurf->Stride();
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whiteData += whiteSurf->Stride();
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}
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blackSurf->MarkDirty();
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return true;
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}
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