18e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project/* 20bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch * Copyright (c) 2008, 2009, Google Inc. All rights reserved. 30bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch * 48e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * Redistribution and use in source and binary forms, with or without 50bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch * modification, are permitted provided that the following conditions are 60bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch * met: 70bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch * 80bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch * * Redistributions of source code must retain the above copyright 90bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch * notice, this list of conditions and the following disclaimer. 100bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch * * Redistributions in binary form must reproduce the above 110bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch * copyright notice, this list of conditions and the following disclaimer 120bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch * in the documentation and/or other materials provided with the 130bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch * distribution. 140bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch * * Neither the name of Google Inc. nor the names of its 150bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch * contributors may be used to endorse or promote products derived from 160bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch * this software without specific prior written permission. 170bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch * 180bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 190bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 200bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 210bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 220bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 230bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 240bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 250bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 260bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 278e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 280bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 298e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project */ 300bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch 318e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include "config.h" 328e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project#include "BMPImageDecoder.h" 338e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 340bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch#include "BMPImageReader.h" 350bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch 360bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdochnamespace WebCore { 370bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch 380bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch// Number of bits in .BMP used to store the file header (doesn't match 390bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch// "sizeof(BMPImageDecoder::BitmapFileHeader)" since we omit some fields and 400bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch// don't pack). 410bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdochstatic const size_t sizeOfFileHeader = 14; 420bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch 43f05b935882198ccf7d81675736e3aeb089c5113aBen MurdochBMPImageDecoder::BMPImageDecoder(ImageSource::AlphaOption alphaOption, 44f05b935882198ccf7d81675736e3aeb089c5113aBen Murdoch ImageSource::GammaAndColorProfileOption gammaAndColorProfileOption) 45f05b935882198ccf7d81675736e3aeb089c5113aBen Murdoch : ImageDecoder(alphaOption, gammaAndColorProfileOption) 46e8b154fd68f9b33be40a3590e58347f353835f5cSteve Block , m_decodedOffset(0) 478e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 480bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch} 498e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 500bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdochvoid BMPImageDecoder::setData(SharedBuffer* data, bool allDataReceived) 518e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 520bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch if (failed()) 530bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch return; 540bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch 550bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch ImageDecoder::setData(data, allDataReceived); 560bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch if (m_reader) 570bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch m_reader->setData(data); 588e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 590bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch 600bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdochbool BMPImageDecoder::isSizeAvailable() 610bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch{ 62dcc8cf2e65d1aa555cce12431a16547e66b469eeSteve Block if (!ImageDecoder::isSizeAvailable()) 63692e5dbf12901edacf14812a6fae25462920af42Steve Block decode(true); 640bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch 650bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch return ImageDecoder::isSizeAvailable(); 660bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch} 670bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch 6865f03d4f644ce73618e5f4f50dd694b26f55ae12Ben MurdochImageFrame* BMPImageDecoder::frameBufferAtIndex(size_t index) 698e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project{ 700bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch if (index) 710bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch return 0; 720bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch 73e8b154fd68f9b33be40a3590e58347f353835f5cSteve Block if (m_frameBufferCache.isEmpty()) { 740bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch m_frameBufferCache.resize(1); 75e8b154fd68f9b33be40a3590e58347f353835f5cSteve Block m_frameBufferCache.first().setPremultiplyAlpha(m_premultiplyAlpha); 76e8b154fd68f9b33be40a3590e58347f353835f5cSteve Block } 770bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch 7865f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch ImageFrame* buffer = &m_frameBufferCache.first(); 7965f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch if (buffer->status() != ImageFrame::FrameComplete) 80692e5dbf12901edacf14812a6fae25462920af42Steve Block decode(false); 810bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch return buffer; 820bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch} 830bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch 8406ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsenbool BMPImageDecoder::setFailed() 8506ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen{ 8606ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen m_reader.clear(); 8706ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen return ImageDecoder::setFailed(); 8806ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen} 8906ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen 90692e5dbf12901edacf14812a6fae25462920af42Steve Blockvoid BMPImageDecoder::decode(bool onlySize) 910bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch{ 920bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch if (failed()) 930bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch return; 940bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch 950bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch // If we couldn't decode the image but we've received all the data, decoding 960bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch // has failed. 97692e5dbf12901edacf14812a6fae25462920af42Steve Block if (!decodeHelper(onlySize) && isAllDataReceived()) 980bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch setFailed(); 9906ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen // If we're done decoding the image, we don't need the BMPImageReader 10006ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen // anymore. (If we failed, |m_reader| has already been cleared.) 10165f03d4f644ce73618e5f4f50dd694b26f55ae12Ben Murdoch else if (!m_frameBufferCache.isEmpty() && (m_frameBufferCache.first().status() == ImageFrame::FrameComplete)) 10206ea8e899e48f1f2f396b70e63fae369f2f23232Kristian Monsen m_reader.clear(); 1030bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch} 1040bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch 105692e5dbf12901edacf14812a6fae25462920af42Steve Blockbool BMPImageDecoder::decodeHelper(bool onlySize) 1060bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch{ 1070bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch size_t imgDataOffset = 0; 108692e5dbf12901edacf14812a6fae25462920af42Steve Block if ((m_decodedOffset < sizeOfFileHeader) && !processFileHeader(&imgDataOffset)) 1090bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch return false; 1100bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch 1110bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch if (!m_reader) { 112692e5dbf12901edacf14812a6fae25462920af42Steve Block m_reader.set(new BMPImageReader(this, m_decodedOffset, imgDataOffset, false)); 1130bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch m_reader->setData(m_data.get()); 1140bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch } 1150bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch 1160bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch if (!m_frameBufferCache.isEmpty()) 1170bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch m_reader->setBuffer(&m_frameBufferCache.first()); 1180bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch 1190bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch return m_reader->decodeBMP(onlySize); 1200bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch} 1210bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch 1220bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdochbool BMPImageDecoder::processFileHeader(size_t* imgDataOffset) 1230bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch{ 1240bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch ASSERT(imgDataOffset); 1250bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch 1260bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch // Read file header. 1270bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch ASSERT(!m_decodedOffset); 1280bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch if (m_data->size() < sizeOfFileHeader) 1290bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch return false; 130692e5dbf12901edacf14812a6fae25462920af42Steve Block const uint16_t fileType = (m_data->data()[0] << 8) | static_cast<uint8_t>(m_data->data()[1]); 1310bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch *imgDataOffset = readUint32(10); 1320bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch m_decodedOffset = sizeOfFileHeader; 1330bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch 1340bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch // See if this is a bitmap filetype we understand. 1350bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch enum { 1360bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch BMAP = 0x424D, // "BM" 1370bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch // The following additional OS/2 2.x header values (see 1380bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch // http://www.fileformat.info/format/os2bmp/egff.htm ) aren't widely 1390bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch // decoded, and are unlikely to be in much use. 1400bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch /* 1410bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch ICON = 0x4943, // "IC" 1420bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch POINTER = 0x5054, // "PT" 1430bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch COLORICON = 0x4349, // "CI" 1440bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch COLORPOINTER = 0x4350, // "CP" 1450bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch BITMAPARRAY = 0x4241, // "BA" 1460bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch */ 1470bf48ef3be53ddaa52bbead65dfd75bf90e7a2b5Ben Murdoch }; 148dcc8cf2e65d1aa555cce12431a16547e66b469eeSteve Block return (fileType == BMAP) || setFailed(); 1498e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project} 1508e35f3cfc7fba1d1c829dc557ebad6409cbe16a2The Android Open Source Project 1515f1ab04193ad0130ca8204aadaceae083aca9881Feng Qian} // namespace WebCore 152