1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- 2 * This Source Code Form is subject to the terms of the Mozilla Public 3 * License, v. 2.0. If a copy of the MPL was not distributed with this 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 5 6 #include "gfxAlphaRecovery.h" 7 8 #include "gfxImageSurface.h" 9 10 #define MOZILLA_SSE_INCLUDE_HEADER_FOR_SSE2 11 #include "mozilla/SSE.h" 12 13 /* static */ bool RecoverAlpha(gfxImageSurface * blackSurf,const gfxImageSurface * whiteSurf)14gfxAlphaRecovery::RecoverAlpha(gfxImageSurface* blackSurf, 15 const gfxImageSurface* whiteSurf) 16 { 17 mozilla::gfx::IntSize size = blackSurf->GetSize(); 18 19 if (size != whiteSurf->GetSize() || 20 (blackSurf->Format() != mozilla::gfx::SurfaceFormat::A8R8G8B8_UINT32 && 21 blackSurf->Format() != mozilla::gfx::SurfaceFormat::X8R8G8B8_UINT32) || 22 (whiteSurf->Format() != mozilla::gfx::SurfaceFormat::A8R8G8B8_UINT32 && 23 whiteSurf->Format() != mozilla::gfx::SurfaceFormat::X8R8G8B8_UINT32)) 24 return false; 25 26 #ifdef MOZILLA_MAY_SUPPORT_SSE2 27 if (mozilla::supports_sse2() && 28 RecoverAlphaSSE2(blackSurf, whiteSurf)) { 29 return true; 30 } 31 #endif 32 33 blackSurf->Flush(); 34 whiteSurf->Flush(); 35 36 unsigned char* blackData = blackSurf->Data(); 37 unsigned char* whiteData = whiteSurf->Data(); 38 39 for (int32_t i = 0; i < size.height; ++i) { 40 uint32_t* blackPixel = reinterpret_cast<uint32_t*>(blackData); 41 const uint32_t* whitePixel = reinterpret_cast<uint32_t*>(whiteData); 42 for (int32_t j = 0; j < size.width; ++j) { 43 uint32_t recovered = RecoverPixel(blackPixel[j], whitePixel[j]); 44 blackPixel[j] = recovered; 45 } 46 blackData += blackSurf->Stride(); 47 whiteData += whiteSurf->Stride(); 48 } 49 50 blackSurf->MarkDirty(); 51 52 return true; 53 } 54