11cab2921ab279367f8206cdadc9259d12e603548Derek Sollenberger 21cab2921ab279367f8206cdadc9259d12e603548Derek Sollenberger/* 31cab2921ab279367f8206cdadc9259d12e603548Derek Sollenberger * Copyright 2006 The Android Open Source Project 41cab2921ab279367f8206cdadc9259d12e603548Derek Sollenberger * 51cab2921ab279367f8206cdadc9259d12e603548Derek Sollenberger * Use of this source code is governed by a BSD-style license that can be 61cab2921ab279367f8206cdadc9259d12e603548Derek Sollenberger * found in the LICENSE file. 71cab2921ab279367f8206cdadc9259d12e603548Derek Sollenberger */ 81cab2921ab279367f8206cdadc9259d12e603548Derek Sollenberger 90910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 100910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project#include "SkImageDecoder.h" 110910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project#include "SkStream.h" 120910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project#include "SkColorPriv.h" 130910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project#include "SkTypes.h" 140910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 150910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Projectclass SkICOImageDecoder : public SkImageDecoder { 160910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Projectpublic: 170910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project SkICOImageDecoder(); 180910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 190910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project virtual Format getFormat() const { 200910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project return kICO_Format; 210910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project } 220910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 230910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Projectprotected: 240a81c953145c77abea5ca1df9e84c62d9da96094Mike Reed virtual bool onDecode(SkStream* stream, SkBitmap* bm, Mode); 250910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project}; 260910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 271cab2921ab279367f8206cdadc9259d12e603548Derek SollenbergerSkImageDecoder* SkCreateICOImageDecoder(); 281cab2921ab279367f8206cdadc9259d12e603548Derek SollenbergerSkImageDecoder* SkCreateICOImageDecoder() { 291cab2921ab279367f8206cdadc9259d12e603548Derek Sollenberger return new SkICOImageDecoder; 301cab2921ab279367f8206cdadc9259d12e603548Derek Sollenberger} 311cab2921ab279367f8206cdadc9259d12e603548Derek Sollenberger 320910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project///////////////////////////////////////////////////////////////////////////////////////// 330910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 340910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project//read bytes starting from the begin-th index in the buffer 350910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project//read in Intel order, and return an integer 360910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 370910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project#define readByte(buffer,begin) buffer[begin] 380910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project#define read2Bytes(buffer,begin) buffer[begin]+(buffer[begin+1]<<8) 390910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project#define read4Bytes(buffer,begin) buffer[begin]+(buffer[begin+1]<<8)+(buffer[begin+2]<<16)+(buffer[begin+3]<<24) 400910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 410910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project///////////////////////////////////////////////////////////////////////////////////////// 420910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 430910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source ProjectSkICOImageDecoder::SkICOImageDecoder() 440910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project{ 450910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project} 460910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 470910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project//helpers - my function pointer will call one of these, depending on the bitCount, each time through the inner loop 480910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Projectstatic void editPixelBit1(const int pixelNo, const unsigned char* buf, 490910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project const int xorOffset, int& x, int y, const int w, 500910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project SkBitmap* bm, int alphaByte, int m, int shift, SkPMColor* colors); 510910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Projectstatic void editPixelBit4(const int pixelNo, const unsigned char* buf, 520910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project const int xorOffset, int& x, int y, const int w, 530910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project SkBitmap* bm, int alphaByte, int m, int shift, SkPMColor* colors); 540910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Projectstatic void editPixelBit8(const int pixelNo, const unsigned char* buf, 550910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project const int xorOffset, int& x, int y, const int w, 560910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project SkBitmap* bm, int alphaByte, int m, int shift, SkPMColor* colors); 570910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Projectstatic void editPixelBit24(const int pixelNo, const unsigned char* buf, 580910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project const int xorOffset, int& x, int y, const int w, 590910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project SkBitmap* bm, int alphaByte, int m, int shift, SkPMColor* colors); 600910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Projectstatic void editPixelBit32(const int pixelNo, const unsigned char* buf, 610910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project const int xorOffset, int& x, int y, const int w, 620910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project SkBitmap* bm, int alphaByte, int m, int shift, SkPMColor* colors); 630910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 640910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 650910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Projectstatic int calculateRowBytesFor8888(int w, int bitCount) 660910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project{ 670910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project // Default rowBytes is w << 2 for kARGB_8888 680910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project // In the case of a 4 bit image with an odd width, we need to add some 690910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project // so we can go off the end of the drawn bitmap. 700910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project // Add 4 to ensure that it is still a multiple of 4. 710910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project if (4 == bitCount && (w & 0x1)) { 720910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project return (w + 1) << 2; 730910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project } 740910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project // Otherwise return 0, which will allow it to be calculated automatically. 750910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project return 0; 760910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project} 770910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 780a81c953145c77abea5ca1df9e84c62d9da96094Mike Reedbool SkICOImageDecoder::onDecode(SkStream* stream, SkBitmap* bm, Mode mode) 790910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project{ 800910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project size_t length = stream->read(NULL, 0); 810910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project SkAutoMalloc autoMal(length); 820910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project unsigned char* buf = (unsigned char*)autoMal.get(); 830910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project if (stream->read((void*)buf, length) != length) { 840910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project return false; 850910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project } 860910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 870910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //these should always be the same - should i use for error checking? - what about files that have some 880910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //incorrect values, but still decode properly? 890910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int reserved = read2Bytes(buf, 0); // 0 900910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int type = read2Bytes(buf, 2); // 1 910910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project if (reserved != 0 || type != 1) 920910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project return false; 930910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int count = read2Bytes(buf, 4); 940910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 950910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //need to at least have enough space to hold the initial table of info 960910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project if (length < (size_t)(6 + count*16)) 970910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project return false; 980910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 990910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int choice; 1000910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project Chooser* chooser = this->getChooser(); 1010910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //FIXME:if no chooser, consider providing the largest color image 1020910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //what are the odds that the largest image would be monochrome? 1030910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project if (NULL == chooser) { 1040910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project choice = 0; 1050910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project } else { 1060910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project chooser->begin(count); 1070910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project for (int i = 0; i < count; i++) 1080910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project { 1090910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //need to find out the config, width, and height from the stream 1100910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int width = readByte(buf, 6 + i*16); 1110910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int height = readByte(buf, 7 + i*16); 1120910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int offset = read4Bytes(buf, 18 + i*16); 1130910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int bitCount = read2Bytes(buf, offset+14); 1140910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project SkBitmap::Config c; 1150910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //currently only provide ARGB_8888_, but maybe we want kIndex8_Config for 1 and 4, and possibly 8? 1160910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //or maybe we'll determine this based on the provided config 1170910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project switch (bitCount) 1180910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project { 1190910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project case 1: 1200910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project case 4: 1210910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project // In reality, at least for the moment, these will be decoded into kARGB_8888 bitmaps. 1220910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project // However, this will be used to distinguish between the lower quality 1bpp and 4 bpp 1230910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project // images and the higher quality images. 1240910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project c = SkBitmap::kIndex8_Config; 1250910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project break; 1260910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project case 8: 1270910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project case 24: 1280910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project case 32: 1290910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project c = SkBitmap::kARGB_8888_Config; 1300910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project break; 1310910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project default: 1320910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project SkDEBUGF(("Image with %ibpp not supported\n", bitCount)); 1330910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project continue; 1340910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project } 1350910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project chooser->inspect(i, c, width, height); 1360910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project } 1370910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project choice = chooser->choose(); 1380910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project } 1390910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 1400910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //you never know what the chooser is going to supply 1410910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project if (choice >= count || choice < 0) 1420910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project return false; 1430910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 1440910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //skip ahead to the correct header 1450910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //commented out lines are not used, but if i switch to other read method, need to know how many to skip 1460910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //otherwise, they could be used for error checking 1470910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int w = readByte(buf, 6 + choice*16); 1480910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int h = readByte(buf, 7 + choice*16); 1490910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int colorCount = readByte(buf, 8 + choice*16); 1500910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //int reservedToo = readByte(buf, 9 + choice*16); //0 1510910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //int planes = read2Bytes(buf, 10 + choice*16); //1 - but often 0 1520910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //int fakeBitCount = read2Bytes(buf, 12 + choice*16); //should be real - usually 0 1530910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int size = read4Bytes(buf, 14 + choice*16); //matters? 1540910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int offset = read4Bytes(buf, 18 + choice*16); 1550910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project if ((size_t)(offset + size) > length) 1560910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project return false; 1570910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //int infoSize = read4Bytes(buf, offset); //40 1580910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //int width = read4Bytes(buf, offset+4); //should == w 1590910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //int height = read4Bytes(buf, offset+8); //should == 2*h 1600910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //int planesToo = read2Bytes(buf, offset+12); //should == 1 (does it?) 1610910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int bitCount = read2Bytes(buf, offset+14); 1620910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 1630910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project void (*placePixel)(const int pixelNo, const unsigned char* buf, 1640910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project const int xorOffset, int& x, int y, const int w, 1650910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project SkBitmap* bm, int alphaByte, int m, int shift, SkPMColor* colors) = NULL; 1660910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project switch (bitCount) 1670910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project { 1680910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project case 1: 1690910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project placePixel = &editPixelBit1; 1700910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project colorCount = 2; 1710910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project break; 1720910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project case 4: 1730910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project placePixel = &editPixelBit4; 1740910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project colorCount = 16; 1750910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project break; 1760910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project case 8: 1770910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project placePixel = &editPixelBit8; 1780910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project colorCount = 256; 1790910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project break; 1800910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project case 24: 1810910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project placePixel = &editPixelBit24; 1820910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project colorCount = 0; 1830910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project break; 1840910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project case 32: 1850910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project placePixel = &editPixelBit32; 1860910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project colorCount = 0; 1870910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project break; 1880910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project default: 1890910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project SkDEBUGF(("Decoding %ibpp is unimplemented\n", bitCount)); 1900910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project return false; 1910910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project } 1920910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 1930910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //these should all be zero, but perhaps are not - need to check 1940910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //int compression = read4Bytes(buf, offset+16); //0 1950910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //int imageSize = read4Bytes(buf, offset+20); //0 - sometimes has a value 1960910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //int xPixels = read4Bytes(buf, offset+24); //0 1970910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //int yPixels = read4Bytes(buf, offset+28); //0 1980910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //int colorsUsed = read4Bytes(buf, offset+32) //0 - might have an actual value though 1990910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //int colorsImportant = read4Bytes(buf, offset+36); //0 2000910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 2010910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int begin = offset + 40; 2020910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //this array represents the colortable 2030910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //if i allow other types of bitmaps, it may actually be used as a part of the bitmap 2040910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project SkPMColor* colors = NULL; 2050910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int blue, green, red; 2060910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project if (colorCount) 2070910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project { 2080910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project colors = new SkPMColor[colorCount]; 2090910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project for (int j = 0; j < colorCount; j++) 2100910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project { 2110910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //should this be a function - maybe a #define? 2120910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project blue = readByte(buf, begin + 4*j); 2130910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project green = readByte(buf, begin + 4*j + 1); 2140910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project red = readByte(buf, begin + 4*j + 2); 2150910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project colors[j] = SkPackARGB32(0xFF, red & 0xFF, green & 0xFF, blue & 0xFF); 2160910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project } 2170910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project } 2180910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int bitWidth = w*bitCount; 2190910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int test = bitWidth & 0x1F; 2200910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int mask = -(((test >> 4) | (test >> 3) | (test >> 2) | (test >> 1) | test) & 0x1); //either 0xFFFFFFFF or 0 2210910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int lineBitWidth = (bitWidth & 0xFFFFFFE0) + (0x20 & mask); 2220910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int lineWidth = lineBitWidth/bitCount; 2230910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 2240910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int xorOffset = begin + colorCount*4; //beginning of the color bitmap 2250910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //other read method means we will just be here already 2260910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int andOffset = xorOffset + ((lineWidth*h*bitCount) >> 3); 2270910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 2280910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project /*int */test = w & 0x1F; //the low 5 bits - we are rounding up to the next 32 (2^5) 2290910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project /*int */mask = -(((test >> 4) | (test >> 3) | (test >> 2) | (test >> 1) | test) & 0x1); //either 0xFFFFFFFF or 0 2300910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int andLineWidth = (w & 0xFFFFFFE0) + (0x20 & mask); 2310910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //if we allow different Configs, everything is the same til here 2320910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //change the config, and use different address getter, and place index vs color, and add the color table 2330910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //FIXME: what is the tradeoff in size? 2340910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //if the andbitmap (mask) is all zeroes, then we can easily do an index bitmap 2350910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //however, with small images with large colortables, maybe it's better to still do argb_8888 2360910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 2370910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project if (SkImageDecoder::kDecodeBounds_Mode == mode) { 238c0b4fa78738acf9ad587eb9fcbc2021be9a3ee77Chet Haase bm->setConfig(SkBitmap::kARGB_8888_Config, w, h, calculateRowBytesFor8888(w, bitCount)); 2390910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project delete[] colors; 2400910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project return true; 2410910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project } 242c0b4fa78738acf9ad587eb9fcbc2021be9a3ee77Chet Haase#ifdef SK_BUILD_FOR_ANDROID 243c0b4fa78738acf9ad587eb9fcbc2021be9a3ee77Chet Haase // No Bitmap reuse supported for this format 244c0b4fa78738acf9ad587eb9fcbc2021be9a3ee77Chet Haase if (!bm->isNull()) { 245c0b4fa78738acf9ad587eb9fcbc2021be9a3ee77Chet Haase return false; 246c0b4fa78738acf9ad587eb9fcbc2021be9a3ee77Chet Haase } 247c0b4fa78738acf9ad587eb9fcbc2021be9a3ee77Chet Haase#endif 248c0b4fa78738acf9ad587eb9fcbc2021be9a3ee77Chet Haase bm->setConfig(SkBitmap::kARGB_8888_Config, w, h, calculateRowBytesFor8888(w, bitCount)); 2490910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 2500910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project if (!this->allocPixelRef(bm, NULL)) 2510910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project { 2520910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project delete[] colors; 2530910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project return false; 2540910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project } 2550910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 2560910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project SkAutoLockPixels alp(*bm); 2570910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 2580910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project for (int y = 0; y < h; y++) 2590910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project { 2600910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project for (int x = 0; x < w; x++) 2610910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project { 2620910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //U32* address = bm->getAddr32(x, y); 2630910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 2640910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //check the alpha bit first, but pass it along to the function to figure out how to deal with it 2650910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int andPixelNo = andLineWidth*(h-y-1)+x; 2660910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //only need to get a new alphaByte when x %8 == 0 2670910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //but that introduces an if and a mod - probably much slower 2680910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //that's ok, it's just a read of an array, not a stream 2690910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int alphaByte = readByte(buf, andOffset + (andPixelNo >> 3)); 2700910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int shift = 7 - (andPixelNo & 0x7); 2710910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int m = 1 << shift; 2720910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 2730910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int pixelNo = lineWidth*(h-y-1)+x; 2740910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project placePixel(pixelNo, buf, xorOffset, x, y, w, bm, alphaByte, m, shift, colors); 2750910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 2760910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project } 2770910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project } 2780910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 2790910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project delete [] colors; 2800910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //ensure we haven't read off the end? 2810910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //of course this doesn't help us if the andOffset was a lie... 2820910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //return andOffset + (andLineWidth >> 3) <= length; 2830910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project return true; 2840910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project} //onDecode 2850910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 2860910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project//function to place the pixel, determined by the bitCount 2870910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Projectstatic void editPixelBit1(const int pixelNo, const unsigned char* buf, 2880910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project const int xorOffset, int& x, int y, const int w, 2890910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project SkBitmap* bm, int alphaByte, int m, int shift, SkPMColor* colors) 2900910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project{ 2910910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project // note that this should be the same as/similar to the AND bitmap 2920910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project SkPMColor* address = bm->getAddr32(x,y); 2930910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int byte = readByte(buf, xorOffset + (pixelNo >> 3)); 2940910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int colorBit; 2950910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int alphaBit; 2960910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project // Read all of the bits in this byte. 2970910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int i = x + 8; 2980910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project // Pin to the width so we do not write outside the bounds of 2990910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project // our color table. 3000910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project i = i > w ? w : i; 3010910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project // While loop to check all 8 bits individually. 3020910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project while (x < i) 3030910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project { 3040910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 3050910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project colorBit = (byte & m) >> shift; 3060910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project alphaBit = (alphaByte & m) >> shift; 3070910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project *address = (alphaBit-1)&(colors[colorBit]); 3080910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project x++; 3090910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project // setup for the next pixel 3100910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project address = address + 1; 3110910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project m = m >> 1; 3120910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project shift -= 1; 3130910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project } 3140910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project x--; 3150910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project} 3160910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Projectstatic void editPixelBit4(const int pixelNo, const unsigned char* buf, 3170910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project const int xorOffset, int& x, int y, const int w, 3180910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project SkBitmap* bm, int alphaByte, int m, int shift, SkPMColor* colors) 3190910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project{ 3200910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project SkPMColor* address = bm->getAddr32(x, y); 3210910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int byte = readByte(buf, xorOffset + (pixelNo >> 1)); 3220910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int pixel = (byte >> 4) & 0xF; 3230910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int alphaBit = (alphaByte & m) >> shift; 3240910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project *address = (alphaBit-1)&(colors[pixel]); 3250910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project x++; 3260910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //if w is odd, x may be the same as w, which means we are writing to an unused portion of the bitmap 3270910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //but that's okay, since i've added an extra rowByte for just this purpose 3280910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project address = address + 1; 3290910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project pixel = byte & 0xF; 3300910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project m = m >> 1; 3310910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project alphaBit = (alphaByte & m) >> (shift-1); 3320910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //speed up trick here 3330910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project *address = (alphaBit-1)&(colors[pixel]); 3340910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project} 3350910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 3360910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Projectstatic void editPixelBit8(const int pixelNo, const unsigned char* buf, 3370910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project const int xorOffset, int& x, int y, const int w, 3380910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project SkBitmap* bm, int alphaByte, int m, int shift, SkPMColor* colors) 3390910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project{ 3400910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project SkPMColor* address = bm->getAddr32(x, y); 3410910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int pixel = readByte(buf, xorOffset + pixelNo); 3420910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int alphaBit = (alphaByte & m) >> shift; 3430910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project *address = (alphaBit-1)&(colors[pixel]); 3440910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project} 3450910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 3460910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Projectstatic void editPixelBit24(const int pixelNo, const unsigned char* buf, 3470910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project const int xorOffset, int& x, int y, const int w, 3480910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project SkBitmap* bm, int alphaByte, int m, int shift, SkPMColor* colors) 3490910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project{ 3500910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project SkPMColor* address = bm->getAddr32(x, y); 3510910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int blue = readByte(buf, xorOffset + 3*pixelNo); 3520910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int green = readByte(buf, xorOffset + 3*pixelNo + 1); 3530910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int red = readByte(buf, xorOffset + 3*pixelNo + 2); 3540910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int alphaBit = (alphaByte & m) >> shift; 3550910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project //alphaBit == 1 => alpha = 0 3560910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int alpha = (alphaBit-1) & 0xFF; 3574c1037238c8ebcef8c75b5d43730ed308a11102cMike Reed *address = SkPreMultiplyARGB(alpha, red, green, blue); 3580910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project} 3590910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 3600910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Projectstatic void editPixelBit32(const int pixelNo, const unsigned char* buf, 3610910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project const int xorOffset, int& x, int y, const int w, 3620910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project SkBitmap* bm, int alphaByte, int m, int shift, SkPMColor* colors) 3630910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project{ 3640910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project SkPMColor* address = bm->getAddr32(x, y); 3650910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int blue = readByte(buf, xorOffset + 4*pixelNo); 3660910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int green = readByte(buf, xorOffset + 4*pixelNo + 1); 3670910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int red = readByte(buf, xorOffset + 4*pixelNo + 2); 3680910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int alphaBit = (alphaByte & m) >> shift; 369d6cd36570b5f18182c711532172cf233a41e643fDerek Sollenberger#if 1 // don't trust the alphaBit for 32bit images <mrr> 370d6cd36570b5f18182c711532172cf233a41e643fDerek Sollenberger alphaBit = 0; 371d6cd36570b5f18182c711532172cf233a41e643fDerek Sollenberger#endif 3720910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int alpha = readByte(buf, xorOffset + 4*pixelNo + 3) & ((alphaBit-1)&0xFF); 3734c1037238c8ebcef8c75b5d43730ed308a11102cMike Reed *address = SkPreMultiplyARGB(alpha, red, green, blue); 3740910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project} 3750910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 3760910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project///////////////////////////////////////////////////////////////////////////////////////// 3770910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 3780910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project#include "SkTRegistry.h" 3790910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 3800910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Projectstatic SkImageDecoder* Factory(SkStream* stream) { 3810910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project // Check to see if the first four bytes are 0,0,1,0 3820910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project // FIXME: Is that required and sufficient? 3830910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project SkAutoMalloc autoMal(4); 3840910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project unsigned char* buf = (unsigned char*)autoMal.get(); 3850910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project stream->read((void*)buf, 4); 3860910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int reserved = read2Bytes(buf, 0); 3870910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project int type = read2Bytes(buf, 2); 3880910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project if (reserved != 0 || type != 1) { 3890910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project // This stream does not represent an ICO image. 3900910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project return NULL; 3910910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project } 3920910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project return SkNEW(SkICOImageDecoder); 3930910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project} 3940910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 3950910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Projectstatic SkTRegistry<SkImageDecoder*, SkStream*> gReg(Factory); 3960910916c0f7b951ee55c4b7c6358295b9bca0565The Android Open Source Project 397