diff options
Diffstat (limited to 'plugins/AdvaImg/src/FreeImage/PluginGIF.cpp')
| -rw-r--r-- | plugins/AdvaImg/src/FreeImage/PluginGIF.cpp | 1406 |
1 files changed, 0 insertions, 1406 deletions
diff --git a/plugins/AdvaImg/src/FreeImage/PluginGIF.cpp b/plugins/AdvaImg/src/FreeImage/PluginGIF.cpp deleted file mode 100644 index d9b430eac5..0000000000 --- a/plugins/AdvaImg/src/FreeImage/PluginGIF.cpp +++ /dev/null @@ -1,1406 +0,0 @@ -// ========================================================== -// GIF Loader and Writer -// -// Design and implementation by -// - Ryan Rubley <ryan@lostreality.org> -// - Raphaлl Gaquer <raphael.gaquer@alcer.com> -// - Aaron Shumate <aaron@shumate.us> -// -// This file is part of FreeImage 3 -// -// COVERED CODE IS PROVIDED UNDER THIS LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTY -// OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, WARRANTIES -// THAT THE COVERED CODE IS FREE OF DEFECTS, MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE -// OR NON-INFRINGING. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE COVERED -// CODE IS WITH YOU. SHOULD ANY COVERED CODE PROVE DEFECTIVE IN ANY RESPECT, YOU (NOT -// THE INITIAL DEVELOPER OR ANY OTHER CONTRIBUTOR) ASSUME THE COST OF ANY NECESSARY -// SERVICING, REPAIR OR CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL -// PART OF THIS LICENSE. NO USE OF ANY COVERED CODE IS AUTHORIZED HEREUNDER EXCEPT UNDER -// THIS DISCLAIMER. -// -// Use at your own risk! -// ========================================================== - -#ifdef _MSC_VER -#pragma warning (disable : 4786) // identifier was truncated to 'number' characters -#endif - -#include "FreeImage.h" -#include "Utilities.h" -#include "../Metadata/FreeImageTag.h" - -// ========================================================== -// Metadata declarations -// ========================================================== - -#define GIF_DISPOSAL_UNSPECIFIED 0 -#define GIF_DISPOSAL_LEAVE 1 -#define GIF_DISPOSAL_BACKGROUND 2 -#define GIF_DISPOSAL_PREVIOUS 3 - -// ========================================================== -// Constant/Typedef declarations -// ========================================================== - -struct GIFinfo { - BOOL read; - //only really used when reading - size_t global_color_table_offset; - int global_color_table_size; - BYTE background_color; - std::vector<size_t> application_extension_offsets; - std::vector<size_t> comment_extension_offsets; - std::vector<size_t> graphic_control_extension_offsets; - std::vector<size_t> image_descriptor_offsets; - - GIFinfo() : read(0), global_color_table_offset(0), global_color_table_size(0), background_color(0) - { - } -}; - -struct PageInfo { - PageInfo(int d, int l, int t, int w, int h) { - disposal_method = d; left = (WORD)l; top = (WORD)t; width = (WORD)w; height = (WORD)h; - } - int disposal_method; - WORD left, top, width, height; -}; - -//GIF defines a max of 12 bits per code -#define MAX_LZW_CODE 4096 - -class StringTable -{ -public: - StringTable(); - ~StringTable(); - void Initialize(int minCodeSize); - BYTE *FillInputBuffer(int len); - void CompressStart(int bpp, int width); - int CompressEnd(BYTE *buf); //0-4 bytes - bool Compress(BYTE *buf, int *len); - bool Decompress(BYTE *buf, int *len); - void Done(void); - -protected: - bool m_done; - - int m_minCodeSize, m_clearCode, m_endCode, m_nextCode; - - int m_bpp, m_slack; //Compressor information - - int m_prefix; //Compressor state variable - int m_codeSize, m_codeMask; //Compressor/Decompressor state variables - int m_oldCode; //Decompressor state variable - int m_partial, m_partialSize; //Compressor/Decompressor bit buffer - - int firstPixelPassed; // A specific flag that indicates if the first pixel - // of the whole image had already been read - - std::string m_strings[MAX_LZW_CODE]; //This is what is really the "string table" data for the Decompressor - int* m_strmap; - - //input buffer - BYTE *m_buffer; - int m_bufferSize, m_bufferRealSize, m_bufferPos, m_bufferShift; - - void ClearCompressorTable(void); - void ClearDecompressorTable(void); -}; - -#define GIF_PACKED_LSD_HAVEGCT 0x80 -#define GIF_PACKED_LSD_COLORRES 0x70 -#define GIF_PACKED_LSD_GCTSORTED 0x08 -#define GIF_PACKED_LSD_GCTSIZE 0x07 -#define GIF_PACKED_ID_HAVELCT 0x80 -#define GIF_PACKED_ID_INTERLACED 0x40 -#define GIF_PACKED_ID_LCTSORTED 0x20 -#define GIF_PACKED_ID_RESERVED 0x18 -#define GIF_PACKED_ID_LCTSIZE 0x07 -#define GIF_PACKED_GCE_RESERVED 0xE0 -#define GIF_PACKED_GCE_DISPOSAL 0x1C -#define GIF_PACKED_GCE_WAITINPUT 0x02 -#define GIF_PACKED_GCE_HAVETRANS 0x01 - -#define GIF_BLOCK_IMAGE_DESCRIPTOR 0x2C -#define GIF_BLOCK_EXTENSION 0x21 -#define GIF_BLOCK_TRAILER 0x3B - -#define GIF_EXT_PLAINTEXT 0x01 -#define GIF_EXT_GRAPHIC_CONTROL 0xF9 -#define GIF_EXT_COMMENT 0xFE -#define GIF_EXT_APPLICATION 0xFF - -#define GIF_INTERLACE_PASSES 4 -static int g_GifInterlaceOffset[GIF_INTERLACE_PASSES] = {0, 4, 2, 1}; -static int g_GifInterlaceIncrement[GIF_INTERLACE_PASSES] = {8, 8, 4, 2}; - -// ========================================================== -// Helpers Functions -// ========================================================== - -static BOOL -FreeImage_SetMetadataEx(FREE_IMAGE_MDMODEL model, FIBITMAP *dib, const char *key, WORD id, FREE_IMAGE_MDTYPE type, DWORD count, DWORD length, const void *value) -{ - BOOL bResult = FALSE; - FITAG *tag = FreeImage_CreateTag(); - if(tag) { - FreeImage_SetTagKey(tag, key); - FreeImage_SetTagID(tag, id); - FreeImage_SetTagType(tag, type); - FreeImage_SetTagCount(tag, count); - FreeImage_SetTagLength(tag, length); - FreeImage_SetTagValue(tag, value); - if(model == FIMD_ANIMATION) { - TagLib& s = TagLib::instance(); - // get the tag description - const char *description = s.getTagDescription(TagLib::ANIMATION, id); - FreeImage_SetTagDescription(tag, description); - } - // store the tag - bResult = FreeImage_SetMetadata(model, dib, key, tag); - FreeImage_DeleteTag(tag); - } - return bResult; -} - -static BOOL -FreeImage_GetMetadataEx(FREE_IMAGE_MDMODEL model, FIBITMAP *dib, const char *key, FREE_IMAGE_MDTYPE type, FITAG **tag) -{ - if( FreeImage_GetMetadata(model, dib, key, tag) ) { - if( FreeImage_GetTagType(*tag) == type ) { - return TRUE; - } - } - return FALSE; -} - -StringTable::StringTable() -{ - m_buffer = NULL; - firstPixelPassed = 0; // Still no pixel read - // Maximum number of entries in the map is MAX_LZW_CODE * 256 - // (aka 2**12 * 2**8 => a 20 bits key) - // This Map could be optmized to only handle MAX_LZW_CODE * 2**(m_bpp) - m_strmap = new(std::nothrow) int[1<<20]; -} - -StringTable::~StringTable() -{ - if( m_buffer != NULL ) { - delete [] m_buffer; - } - if( m_strmap != NULL ) { - delete [] m_strmap; - m_strmap = NULL; - } -} - -void StringTable::Initialize(int minCodeSize) -{ - m_done = false; - - m_bpp = 8; - m_minCodeSize = minCodeSize; - m_clearCode = 1 << m_minCodeSize; - if(m_clearCode > MAX_LZW_CODE) { - m_clearCode = MAX_LZW_CODE; - } - m_endCode = m_clearCode + 1; - - m_partial = 0; - m_partialSize = 0; - - m_bufferSize = 0; - ClearCompressorTable(); - ClearDecompressorTable(); -} - -BYTE *StringTable::FillInputBuffer(int len) -{ - if( m_buffer == NULL ) { - m_buffer = new(std::nothrow) BYTE[len]; - m_bufferRealSize = len; - } else if( len > m_bufferRealSize ) { - delete [] m_buffer; - m_buffer = new(std::nothrow) BYTE[len]; - m_bufferRealSize = len; - } - m_bufferSize = len; - m_bufferPos = 0; - m_bufferShift = 8 - m_bpp; - return m_buffer; -} - -void StringTable::CompressStart(int bpp, int width) -{ - m_bpp = bpp; - m_slack = (8 - ((width * bpp) % 8)) % 8; - - m_partial |= m_clearCode << m_partialSize; - m_partialSize += m_codeSize; - ClearCompressorTable(); -} - -int StringTable::CompressEnd(BYTE *buf) -{ - int len = 0; - - //output code for remaining prefix - m_partial |= m_prefix << m_partialSize; - m_partialSize += m_codeSize; - while( m_partialSize >= 8 ) { - *buf++ = (BYTE)m_partial; - m_partial >>= 8; - m_partialSize -= 8; - len++; - } - - //add the end of information code and flush the entire buffer out - m_partial |= m_endCode << m_partialSize; - m_partialSize += m_codeSize; - while( m_partialSize > 0 ) { - *buf++ = (BYTE)m_partial; - m_partial >>= 8; - m_partialSize -= 8; - len++; - } - - //most this can be is 4 bytes. 7 bits in m_partial to start + 12 for the - //last code + 12 for the end code = 31 bits total. - return len; -} - -bool StringTable::Compress(BYTE *buf, int *len) -{ - if( m_bufferSize == 0 || m_done ) { - return false; - } - - int mask = (1 << m_bpp) - 1; - BYTE *bufpos = buf; - while( m_bufferPos < m_bufferSize ) { - //get the current pixel value - char ch = (char)((m_buffer[m_bufferPos] >> m_bufferShift) & mask); - - // The next prefix is : - // <the previous LZW code (on 12 bits << 8)> | <the code of the current pixel (on 8 bits)> - int nextprefix = (((m_prefix)<<8)&0xFFF00) + (ch & 0x000FF); - if(firstPixelPassed) { - - if( m_strmap[nextprefix] > 0) { - m_prefix = m_strmap[nextprefix]; - } else { - m_partial |= m_prefix << m_partialSize; - m_partialSize += m_codeSize; - //grab full bytes for the output buffer - while( m_partialSize >= 8 && bufpos - buf < *len ) { - *bufpos++ = (BYTE)m_partial; - m_partial >>= 8; - m_partialSize -= 8; - } - - //add the code to the "table map" - m_strmap[nextprefix] = m_nextCode; - - //increment the next highest valid code, increase the code size - if( m_nextCode == (1 << m_codeSize) ) { - m_codeSize++; - } - m_nextCode++; - - //if we're out of codes, restart the string table - if( m_nextCode == MAX_LZW_CODE ) { - m_partial |= m_clearCode << m_partialSize; - m_partialSize += m_codeSize; - ClearCompressorTable(); - } - - // Only keep the 8 lowest bits (prevent problems with "negative chars") - m_prefix = ch & 0x000FF; - } - - //increment to the next pixel - if( m_bufferShift > 0 && !(m_bufferPos + 1 == m_bufferSize && m_bufferShift <= m_slack) ) { - m_bufferShift -= m_bpp; - } else { - m_bufferPos++; - m_bufferShift = 8 - m_bpp; - } - - //jump out here if the output buffer is full - if( bufpos - buf == *len ) { - return true; - } - - } else { - // Specific behavior for the first pixel of the whole image - - firstPixelPassed=1; - // Only keep the 8 lowest bits (prevent problems with "negative chars") - m_prefix = ch & 0x000FF; - - //increment to the next pixel - if( m_bufferShift > 0 && !(m_bufferPos + 1 == m_bufferSize && m_bufferShift <= m_slack) ) { - m_bufferShift -= m_bpp; - } else { - m_bufferPos++; - m_bufferShift = 8 - m_bpp; - } - - //jump out here if the output buffer is full - if( bufpos - buf == *len ) { - return true; - } - } - } - - m_bufferSize = 0; - *len = (int)(bufpos - buf); - - return true; -} - -bool StringTable::Decompress(BYTE *buf, int *len) -{ - if( m_bufferSize == 0 || m_done ) { - return false; - } - - BYTE *bufpos = buf; - for( ; m_bufferPos < m_bufferSize; m_bufferPos++ ) { - m_partial |= (int)m_buffer[m_bufferPos] << m_partialSize; - m_partialSize += 8; - while( m_partialSize >= m_codeSize ) { - int code = m_partial & m_codeMask; - m_partial >>= m_codeSize; - m_partialSize -= m_codeSize; - - if( code > m_nextCode || /*(m_nextCode == MAX_LZW_CODE && code != m_clearCode) || */code == m_endCode ) { - m_done = true; - *len = (int)(bufpos - buf); - return true; - } - if( code == m_clearCode ) { - ClearDecompressorTable(); - continue; - } - - //add new string to string table, if not the first pass since a clear code - if( m_oldCode != MAX_LZW_CODE && m_nextCode < MAX_LZW_CODE) { - m_strings[m_nextCode] = m_strings[m_oldCode] + m_strings[code == m_nextCode ? m_oldCode : code][0]; - } - - if( (int)m_strings[code].size() > *len - (bufpos - buf) ) { - //out of space, stuff the code back in for next time - m_partial <<= m_codeSize; - m_partialSize += m_codeSize; - m_partial |= code; - m_bufferPos++; - *len = (int)(bufpos - buf); - return true; - } - - //output the string into the buffer - memcpy(bufpos, m_strings[code].data(), m_strings[code].size()); - bufpos += m_strings[code].size(); - - //increment the next highest valid code, add a bit to the mask if we need to increase the code size - if( m_oldCode != MAX_LZW_CODE && m_nextCode < MAX_LZW_CODE ) { - if( ++m_nextCode < MAX_LZW_CODE ) { - if( (m_nextCode & m_codeMask) == 0 ) { - m_codeSize++; - m_codeMask |= m_nextCode; - } - } - } - - m_oldCode = code; - } - } - - m_bufferSize = 0; - *len = (int)(bufpos - buf); - - return true; -} - -void StringTable::Done(void) -{ - m_done = true; -} - -void StringTable::ClearCompressorTable(void) -{ - if(m_strmap) { - memset(m_strmap, 0xFF, sizeof(unsigned int)*(1<<20)); - } - m_nextCode = m_endCode + 1; - - m_prefix = 0; - m_codeSize = m_minCodeSize + 1; -} - -void StringTable::ClearDecompressorTable(void) -{ - for( int i = 0; i < m_clearCode; i++ ) { - m_strings[i].resize(1); - m_strings[i][0] = (char)i; - } - m_nextCode = m_endCode + 1; - - m_codeSize = m_minCodeSize + 1; - m_codeMask = (1 << m_codeSize) - 1; - m_oldCode = MAX_LZW_CODE; -} - -// ========================================================== -// Plugin Interface -// ========================================================== - -static int s_format_id; - -// ========================================================== -// Plugin Implementation -// ========================================================== - -static const char * DLL_CALLCONV -Format() { - return "GIF"; -} - -static const char * DLL_CALLCONV -Description() { - return "Graphics Interchange Format"; -} - -static const char * DLL_CALLCONV -Extension() { - return "gif"; -} - -static const char * DLL_CALLCONV -RegExpr() { - return "^GIF"; -} - -static const char * DLL_CALLCONV -MimeType() { - return "image/gif"; -} - -static BOOL DLL_CALLCONV -Validate(FreeImageIO *io, fi_handle handle) { - char buf[6]; - if( io->read_proc(buf, 6, 1, handle) < 1 ) { - return FALSE; - } - - BOOL bResult = FALSE; - if( !strncmp(buf, "GIF", 3) ) { - if( buf[3] >= '0' && buf[3] <= '9' && buf[4] >= '0' && buf[4] <= '9' && buf[5] >= 'a' && buf[5] <= 'z' ) { - bResult = TRUE; - } - } - - io->seek_proc(handle, -6, SEEK_CUR); - - return bResult; -} - -static BOOL DLL_CALLCONV -SupportsExportDepth(int depth) { - return (depth == 1) || - (depth == 4) || - (depth == 8); -} - -static BOOL DLL_CALLCONV -SupportsExportType(FREE_IMAGE_TYPE type) { - return (type == FIT_BITMAP) ? TRUE : FALSE; -} - -// ---------------------------------------------------------- - -static void *DLL_CALLCONV -Open(FreeImageIO *io, fi_handle handle, BOOL read) { - GIFinfo *info = new(std::nothrow) GIFinfo; - if( info == NULL ) { - return NULL; - } - - // 25/02/2008 MDA: Not safe to memset GIFinfo structure with VS 2008 (safe iterators), - // perform initialization in constructor instead. - // memset(info, 0, sizeof(GIFinfo)); - - info->read = read; - if( read ) { - try { - //Header - if( !Validate(io, handle) ) { - throw FI_MSG_ERROR_MAGIC_NUMBER; - } - io->seek_proc(handle, 6, SEEK_CUR); - - //Logical Screen Descriptor - io->seek_proc(handle, 4, SEEK_CUR); - BYTE packed; - if( io->read_proc(&packed, 1, 1, handle) < 1 ) { - throw "EOF reading Logical Screen Descriptor"; - } - if( io->read_proc(&info->background_color, 1, 1, handle) < 1 ) { - throw "EOF reading Logical Screen Descriptor"; - } - io->seek_proc(handle, 1, SEEK_CUR); - - //Global Color Table - if( packed & GIF_PACKED_LSD_HAVEGCT ) { - info->global_color_table_offset = io->tell_proc(handle); - info->global_color_table_size = 2 << (packed & GIF_PACKED_LSD_GCTSIZE); - io->seek_proc(handle, 3 * info->global_color_table_size, SEEK_CUR); - } - - //Scan through all the rest of the blocks, saving offsets - size_t gce_offset = 0; - BYTE block = 0; - while( block != GIF_BLOCK_TRAILER ) { - if( io->read_proc(&block, 1, 1, handle) < 1 ) { - throw "EOF reading blocks"; - } - if( block == GIF_BLOCK_IMAGE_DESCRIPTOR ) { - info->image_descriptor_offsets.push_back(io->tell_proc(handle)); - //GCE may be 0, meaning no GCE preceded this ID - info->graphic_control_extension_offsets.push_back(gce_offset); - gce_offset = 0; - - io->seek_proc(handle, 8, SEEK_CUR); - if( io->read_proc(&packed, 1, 1, handle) < 1 ) { - throw "EOF reading Image Descriptor"; - } - - //Local Color Table - if( packed & GIF_PACKED_ID_HAVELCT ) { - io->seek_proc(handle, 3 * (2 << (packed & GIF_PACKED_ID_LCTSIZE)), SEEK_CUR); - } - - //LZW Minimum Code Size - io->seek_proc(handle, 1, SEEK_CUR); - } else if( block == GIF_BLOCK_EXTENSION ) { - BYTE ext; - if( io->read_proc(&ext, 1, 1, handle) < 1 ) { - throw "EOF reading extension"; - } - - if( ext == GIF_EXT_GRAPHIC_CONTROL ) { - //overwrite previous offset if more than one GCE found before an ID - gce_offset = io->tell_proc(handle); - } else if( ext == GIF_EXT_COMMENT ) { - info->comment_extension_offsets.push_back(io->tell_proc(handle)); - } else if( ext == GIF_EXT_APPLICATION ) { - info->application_extension_offsets.push_back(io->tell_proc(handle)); - } - } else if( block == GIF_BLOCK_TRAILER ) { - continue; - } else { - throw "Invalid GIF block found"; - } - - //Data Sub-blocks - BYTE len; - if( io->read_proc(&len, 1, 1, handle) < 1 ) { - throw "EOF reading sub-block"; - } - while( len != 0 ) { - io->seek_proc(handle, len, SEEK_CUR); - if( io->read_proc(&len, 1, 1, handle) < 1 ) { - throw "EOF reading sub-block"; - } - } - } - } catch (const char *msg) { - FreeImage_OutputMessageProc(s_format_id, msg); - delete info; - return NULL; - } - } else { - //Header - io->write_proc((void *)"GIF89a", 6, 1, handle); - } - - return info; -} - -static void DLL_CALLCONV -Close(FreeImageIO *io, fi_handle handle, void *data) { - if( data == NULL ) { - return; - } - GIFinfo *info = (GIFinfo *)data; - - if( !info->read ) { - //Trailer - BYTE b = GIF_BLOCK_TRAILER; - io->write_proc(&b, 1, 1, handle); - } - - delete info; -} - -static int DLL_CALLCONV -PageCount(FreeImageIO *io, fi_handle handle, void *data) { - if( data == NULL ) { - return 0; - } - GIFinfo *info = (GIFinfo *)data; - - return (int) info->image_descriptor_offsets.size(); -} - -static FIBITMAP * DLL_CALLCONV -Load(FreeImageIO *io, fi_handle handle, int page, int flags, void *data) { - if( data == NULL ) { - return NULL; - } - GIFinfo *info = (GIFinfo *)data; - - if( page == -1 ) { - page = 0; - } - if( page < 0 || page >= (int)info->image_descriptor_offsets.size() ) { - return NULL; - } - - FIBITMAP *dib = NULL; - try { - bool have_transparent = false, no_local_palette = false, interlaced = false; - int disposal_method = GIF_DISPOSAL_LEAVE, delay_time = 0, transparent_color = 0; - WORD left, top, width, height; - BYTE packed, b; - WORD w; - - //playback pages to generate what the user would see for this frame - if( (flags & GIF_PLAYBACK) == GIF_PLAYBACK ) { - //Logical Screen Descriptor - io->seek_proc(handle, 6, SEEK_SET); - WORD logicalwidth, logicalheight; - io->read_proc(&logicalwidth, 2, 1, handle); - io->read_proc(&logicalheight, 2, 1, handle); -#ifdef FREEIMAGE_BIGENDIAN - SwapShort(&logicalwidth); - SwapShort(&logicalheight); -#endif - //set the background color with 0 alpha - RGBQUAD background; - if( info->global_color_table_offset != 0 && info->background_color < info->global_color_table_size ) { - io->seek_proc(handle, (long)(info->global_color_table_offset + (info->background_color * 3)), SEEK_SET); - io->read_proc(&background.rgbRed, 1, 1, handle); - io->read_proc(&background.rgbGreen, 1, 1, handle); - io->read_proc(&background.rgbBlue, 1, 1, handle); - } else { - background.rgbRed = 0; - background.rgbGreen = 0; - background.rgbBlue = 0; - } - background.rgbReserved = 0; - - //allocate entire logical area - dib = FreeImage_Allocate(logicalwidth, logicalheight, 32); - if( dib == NULL ) { - throw FI_MSG_ERROR_DIB_MEMORY; - } - - //fill with background color to start - int x, y; - RGBQUAD *scanline; - for( y = 0; y < logicalheight; y++ ) { - scanline = (RGBQUAD *)FreeImage_GetScanLine(dib, y); - for( x = 0; x < logicalwidth; x++ ) { - *scanline++ = background; - } - } - - //cache some info about each of the pages so we can avoid decoding as many of them as possible - std::vector<PageInfo> pageinfo; - int start = page, end = page; - while( start >= 0 ) { - //Graphic Control Extension - io->seek_proc(handle, (long)(info->graphic_control_extension_offsets[start] + 1), SEEK_SET); - io->read_proc(&packed, 1, 1, handle); - have_transparent = (packed & GIF_PACKED_GCE_HAVETRANS) ? true : false; - disposal_method = (packed & GIF_PACKED_GCE_DISPOSAL) >> 2; - //Image Descriptor - io->seek_proc(handle, (long)(info->image_descriptor_offsets[start]), SEEK_SET); - io->read_proc(&left, 2, 1, handle); - io->read_proc(&top, 2, 1, handle); - io->read_proc(&width, 2, 1, handle); - io->read_proc(&height, 2, 1, handle); -#ifdef FREEIMAGE_BIGENDIAN - SwapShort(&left); - SwapShort(&top); - SwapShort(&width); - SwapShort(&height); -#endif - - pageinfo.push_back(PageInfo(disposal_method, left, top, width, height)); - - if( start != end ) { - if( left == 0 && top == 0 && width == logicalwidth && height == logicalheight ) { - if( disposal_method == GIF_DISPOSAL_BACKGROUND ) { - pageinfo.pop_back(); - start++; - break; - } else if( disposal_method != GIF_DISPOSAL_PREVIOUS ) { - if( !have_transparent ) { - break; - } - } - } - } - start--; - } - if( start < 0 ) { - start = 0; - } - - //draw each page into the logical area - delay_time = 0; - for( page = start; page <= end; page++ ) { - PageInfo &info = pageinfo[end - page]; - //things we can skip having to decode - if( page != end ) { - if( info.disposal_method == GIF_DISPOSAL_PREVIOUS ) { - continue; - } - if( info.disposal_method == GIF_DISPOSAL_BACKGROUND ) { - for( y = 0; y < info.height; y++ ) { - const int scanidx = logicalheight - (y + info.top) - 1; - if ( scanidx < 0 ) { - break; // If data is corrupt, don't calculate in invalid scanline - } - scanline = (RGBQUAD *)FreeImage_GetScanLine(dib, scanidx) + info.left; - for( x = 0; x < info.width; x++ ) { - *scanline++ = background; - } - } - continue; - } - } - - //decode page - FIBITMAP *pagedib = Load(io, handle, page, GIF_LOAD256, data); - if( pagedib != NULL ) { - RGBQUAD *pal = FreeImage_GetPalette(pagedib); - have_transparent = false; - if( FreeImage_IsTransparent(pagedib) ) { - int count = FreeImage_GetTransparencyCount(pagedib); - BYTE *table = FreeImage_GetTransparencyTable(pagedib); - for( int i = 0; i < count; i++ ) { - if( table[i] == 0 ) { - have_transparent = true; - transparent_color = i; - break; - } - } - } - //copy page data into logical buffer, with full alpha opaqueness - for( y = 0; y < info.height; y++ ) { - const int scanidx = logicalheight - (y + info.top) - 1; - if ( scanidx < 0 ) { - break; // If data is corrupt, don't calculate in invalid scanline - } - scanline = (RGBQUAD *)FreeImage_GetScanLine(dib, scanidx) + info.left; - BYTE *pageline = FreeImage_GetScanLine(pagedib, info.height - y - 1); - for( x = 0; x < info.width; x++ ) { - if( !have_transparent || *pageline != transparent_color ) { - *scanline = pal[*pageline]; - scanline->rgbReserved = 255; - } - scanline++; - pageline++; - } - } - //copy frame time - if( page == end ) { - FITAG *tag; - if( FreeImage_GetMetadataEx(FIMD_ANIMATION, pagedib, "FrameTime", FIDT_LONG, &tag) ) { - delay_time = *(LONG *)FreeImage_GetTagValue(tag); - } - } - FreeImage_Unload(pagedib); - } - } - - //setup frame time - FreeImage_SetMetadataEx(FIMD_ANIMATION, dib, "FrameTime", ANIMTAG_FRAMETIME, FIDT_LONG, 1, 4, &delay_time); - return dib; - } - - //get the actual frame image data for a single frame - - //Image Descriptor - io->seek_proc(handle, (long)info->image_descriptor_offsets[page], SEEK_SET); - io->read_proc(&left, 2, 1, handle); - io->read_proc(&top, 2, 1, handle); - io->read_proc(&width, 2, 1, handle); - io->read_proc(&height, 2, 1, handle); -#ifdef FREEIMAGE_BIGENDIAN - SwapShort(&left); - SwapShort(&top); - SwapShort(&width); - SwapShort(&height); -#endif - io->read_proc(&packed, 1, 1, handle); - interlaced = (packed & GIF_PACKED_ID_INTERLACED) ? true : false; - no_local_palette = (packed & GIF_PACKED_ID_HAVELCT) ? false : true; - - int bpp = 8; - if( (flags & GIF_LOAD256) == 0 ) { - if( !no_local_palette ) { - int size = 2 << (packed & GIF_PACKED_ID_LCTSIZE); - if( size <= 2 ) bpp = 1; - else if( size <= 16 ) bpp = 4; - } else if( info->global_color_table_offset != 0 ) { - if( info->global_color_table_size <= 2 ) bpp = 1; - else if( info->global_color_table_size <= 16 ) bpp = 4; - } - } - dib = FreeImage_Allocate(width, height, bpp); - if( dib == NULL ) { - throw FI_MSG_ERROR_DIB_MEMORY; - } - - FreeImage_SetMetadataEx(FIMD_ANIMATION, dib, "FrameLeft", ANIMTAG_FRAMELEFT, FIDT_SHORT, 1, 2, &left); - FreeImage_SetMetadataEx(FIMD_ANIMATION, dib, "FrameTop", ANIMTAG_FRAMETOP, FIDT_SHORT, 1, 2, &top); - b = no_local_palette ? 1 : 0; - FreeImage_SetMetadataEx(FIMD_ANIMATION, dib, "NoLocalPalette", ANIMTAG_NOLOCALPALETTE, FIDT_BYTE, 1, 1, &b); - b = interlaced ? 1 : 0; - FreeImage_SetMetadataEx(FIMD_ANIMATION, dib, "Interlaced", ANIMTAG_INTERLACED, FIDT_BYTE, 1, 1, &b); - - //Palette - RGBQUAD *pal = FreeImage_GetPalette(dib); - if( !no_local_palette ) { - int size = 2 << (packed & GIF_PACKED_ID_LCTSIZE); - - int i = 0; - while( i < size ) { - io->read_proc(&pal[i].rgbRed, 1, 1, handle); - io->read_proc(&pal[i].rgbGreen, 1, 1, handle); - io->read_proc(&pal[i].rgbBlue, 1, 1, handle); - i++; - } - } else if( info->global_color_table_offset != 0 ) { - long pos = io->tell_proc(handle); - io->seek_proc(handle, (long)info->global_color_table_offset, SEEK_SET); - - int i = 0; - while( i < info->global_color_table_size ) { - io->read_proc(&pal[i].rgbRed, 1, 1, handle); - io->read_proc(&pal[i].rgbGreen, 1, 1, handle); - io->read_proc(&pal[i].rgbBlue, 1, 1, handle); - i++; - } - - io->seek_proc(handle, pos, SEEK_SET); - } else { - //its legal to have no palette, but we're going to generate *something* - for( int i = 0; i < 256; i++ ) { - pal[i].rgbRed = (BYTE)i; - pal[i].rgbGreen = (BYTE)i; - pal[i].rgbBlue = (BYTE)i; - } - } - - //LZW Minimum Code Size - io->read_proc(&b, 1, 1, handle); - StringTable *stringtable = new(std::nothrow) StringTable; - stringtable->Initialize(b); - - //Image Data Sub-blocks - int x = 0, xpos = 0, y = 0, shift = 8 - bpp, mask = (1 << bpp) - 1, interlacepass = 0; - BYTE *scanline = FreeImage_GetScanLine(dib, height - 1); - BYTE buf[4096]; - io->read_proc(&b, 1, 1, handle); - while( b ) { - io->read_proc(stringtable->FillInputBuffer(b), b, 1, handle); - int size = sizeof(buf); - while( stringtable->Decompress(buf, &size) ) { - for( int i = 0; i < size; i++ ) { - scanline[xpos] |= (buf[i] & mask) << shift; - if( shift > 0 ) { - shift -= bpp; - } else { - xpos++; - shift = 8 - bpp; - } - if( ++x >= width ) { - if( interlaced ) { - y += g_GifInterlaceIncrement[interlacepass]; - if( y >= height && ++interlacepass < GIF_INTERLACE_PASSES ) { - y = g_GifInterlaceOffset[interlacepass]; - } - } else { - y++; - } - if( y >= height ) { - stringtable->Done(); - break; - } - x = xpos = 0; - shift = 8 - bpp; - scanline = FreeImage_GetScanLine(dib, height - y - 1); - } - } - size = sizeof(buf); - } - io->read_proc(&b, 1, 1, handle); - } - - if( page == 0 ) { - size_t idx; - - //Logical Screen Descriptor - io->seek_proc(handle, 6, SEEK_SET); - WORD logicalwidth, logicalheight; - io->read_proc(&logicalwidth, 2, 1, handle); - io->read_proc(&logicalheight, 2, 1, handle); -#ifdef FREEIMAGE_BIGENDIAN - SwapShort(&logicalwidth); - SwapShort(&logicalheight); -#endif - FreeImage_SetMetadataEx(FIMD_ANIMATION, dib, "LogicalWidth", ANIMTAG_LOGICALWIDTH, FIDT_SHORT, 1, 2, &logicalwidth); - FreeImage_SetMetadataEx(FIMD_ANIMATION, dib, "LogicalHeight", ANIMTAG_LOGICALHEIGHT, FIDT_SHORT, 1, 2, &logicalheight); - - //Global Color Table - if( info->global_color_table_offset != 0 ) { - RGBQUAD globalpalette[256]; - io->seek_proc(handle, (long)info->global_color_table_offset, SEEK_SET); - int i = 0; - while( i < info->global_color_table_size ) { - io->read_proc(&globalpalette[i].rgbRed, 1, 1, handle); - io->read_proc(&globalpalette[i].rgbGreen, 1, 1, handle); - io->read_proc(&globalpalette[i].rgbBlue, 1, 1, handle); - globalpalette[i].rgbReserved = 0; - i++; - } - FreeImage_SetMetadataEx(FIMD_ANIMATION, dib, "GlobalPalette", ANIMTAG_GLOBALPALETTE, FIDT_PALETTE, info->global_color_table_size, info->global_color_table_size * 4, globalpalette); - //background color - if( info->background_color < info->global_color_table_size ) { - FreeImage_SetBackgroundColor(dib, &globalpalette[info->background_color]); - } - } - - //Application Extension - LONG loop = 1; //If no AE with a loop count is found, the default must be 1 - for( idx = 0; idx < info->application_extension_offsets.size(); idx++ ) { - io->seek_proc(handle, (long)info->application_extension_offsets[idx], SEEK_SET); - io->read_proc(&b, 1, 1, handle); - if( b == 11 ) { //All AEs start with an 11 byte sub-block to determine what type of AE it is - char buf[11]; - io->read_proc(buf, 11, 1, handle); - if( !memcmp(buf, "NETSCAPE2.0", 11) || !memcmp(buf, "ANIMEXTS1.0", 11) ) { //Not everybody recognizes ANIMEXTS1.0 but it is valid - io->read_proc(&b, 1, 1, handle); - if( b == 3 ) { //we're supposed to have a 3 byte sub-block now - io->read_proc(&b, 1, 1, handle); //this should be 0x01 but isn't really important - io->read_proc(&w, 2, 1, handle); -#ifdef FREEIMAGE_BIGENDIAN - SwapShort(&w); -#endif - loop = w; - if( loop > 0 ) loop++; - break; - } - } - } - } - FreeImage_SetMetadataEx(FIMD_ANIMATION, dib, "Loop", ANIMTAG_LOOP, FIDT_LONG, 1, 4, &loop); - - // Comment Extension - for (idx = 0; idx < info->comment_extension_offsets.size(); idx++) { - io->seek_proc(handle, (long)info->comment_extension_offsets[idx], SEEK_SET); - std::string comment; - char buf[255]; - io->read_proc(&b, 1, 1, handle); - while (b) { - io->read_proc(buf, b, 1, handle); - comment.append(buf, b); - io->read_proc(&b, 1, 1, handle); - } - comment.append(1, '\0'); - sprintf(buf, "Comment%d", (int)idx); - DWORD comment_size = (DWORD)comment.size(); - FreeImage_SetMetadataEx(FIMD_COMMENTS, dib, buf, 1, FIDT_ASCII, comment_size, comment_size, comment.c_str()); - } - } - - //Graphic Control Extension - if( info->graphic_control_extension_offsets[page] != 0 ) { - io->seek_proc(handle, (long)(info->graphic_control_extension_offsets[page] + 1), SEEK_SET); - io->read_proc(&packed, 1, 1, handle); - io->read_proc(&w, 2, 1, handle); -#ifdef FREEIMAGE_BIGENDIAN - SwapShort(&w); -#endif - io->read_proc(&b, 1, 1, handle); - have_transparent = (packed & GIF_PACKED_GCE_HAVETRANS) ? true : false; - disposal_method = (packed & GIF_PACKED_GCE_DISPOSAL) >> 2; - delay_time = w * 10; //convert cs to ms - transparent_color = b; - if( have_transparent ) { - int size = 1 << bpp; - if( transparent_color <= size ) { - BYTE table[256]; - memset(table, 0xFF, size); - table[transparent_color] = 0; - FreeImage_SetTransparencyTable(dib, table, size); - } - } - } - FreeImage_SetMetadataEx(FIMD_ANIMATION, dib, "FrameTime", ANIMTAG_FRAMETIME, FIDT_LONG, 1, 4, &delay_time); - b = (BYTE)disposal_method; - FreeImage_SetMetadataEx(FIMD_ANIMATION, dib, "DisposalMethod", ANIMTAG_DISPOSALMETHOD, FIDT_BYTE, 1, 1, &b); - - delete stringtable; - - } catch (const char *msg) { - if( dib != NULL ) { - FreeImage_Unload(dib); - } - FreeImage_OutputMessageProc(s_format_id, msg); - return NULL; - } - - return dib; -} - -static BOOL DLL_CALLCONV -Save(FreeImageIO *io, FIBITMAP *dib, fi_handle handle, int page, int flags, void *data) { - if( data == NULL ) { - return FALSE; - } - //GIFinfo *info = (GIFinfo *)data; - - if( page == -1 ) { - page = 0; - } - - try { - BYTE packed, b; - WORD w; - FITAG *tag; - - int bpp = FreeImage_GetBPP(dib); - if( bpp != 1 && bpp != 4 && bpp != 8 ) { - throw "Only 1, 4, or 8 bpp images supported"; - } - - bool have_transparent = false, no_local_palette = false, interlaced = false; - int disposal_method = GIF_DISPOSAL_BACKGROUND, delay_time = 100, transparent_color = 0; - WORD left = 0, top = 0, width = (WORD)FreeImage_GetWidth(dib), height = (WORD)FreeImage_GetHeight(dib); - WORD output_height = height; - if( FreeImage_GetMetadataEx(FIMD_ANIMATION, dib, "FrameLeft", FIDT_SHORT, &tag) ) { - left = *(WORD *)FreeImage_GetTagValue(tag); - } - if( FreeImage_GetMetadataEx(FIMD_ANIMATION, dib, "FrameTop", FIDT_SHORT, &tag) ) { - top = *(WORD *)FreeImage_GetTagValue(tag); - } - if( FreeImage_GetMetadataEx(FIMD_ANIMATION, dib, "NoLocalPalette", FIDT_BYTE, &tag) ) { - no_local_palette = *(BYTE *)FreeImage_GetTagValue(tag) ? true : false; - } - if( FreeImage_GetMetadataEx(FIMD_ANIMATION, dib, "Interlaced", FIDT_BYTE, &tag) ) { - interlaced = *(BYTE *)FreeImage_GetTagValue(tag) ? true : false; - } - if( FreeImage_GetMetadataEx(FIMD_ANIMATION, dib, "FrameTime", FIDT_LONG, &tag) ) { - delay_time = *(LONG *)FreeImage_GetTagValue(tag); - } - if( FreeImage_GetMetadataEx(FIMD_ANIMATION, dib, "DisposalMethod", FIDT_BYTE, &tag) ) { - disposal_method = *(BYTE *)FreeImage_GetTagValue(tag); - } - - RGBQUAD *pal = FreeImage_GetPalette(dib); -#ifdef FREEIMAGE_BIGENDIAN - SwapShort(&left); - SwapShort(&top); - SwapShort(&width); - SwapShort(&height); -#endif - - if( page == 0 ) { - //gather some info - WORD logicalwidth = width; // width has already been swapped... - if( FreeImage_GetMetadataEx(FIMD_ANIMATION, dib, "LogicalWidth", FIDT_SHORT, &tag) ) { - logicalwidth = *(WORD *)FreeImage_GetTagValue(tag); -#ifdef FREEIMAGE_BIGENDIAN - SwapShort(&logicalwidth); -#endif - } - WORD logicalheight = height; // height has already been swapped... - if( FreeImage_GetMetadataEx(FIMD_ANIMATION, dib, "LogicalHeight", FIDT_SHORT, &tag) ) { - logicalheight = *(WORD *)FreeImage_GetTagValue(tag); -#ifdef FREEIMAGE_BIGENDIAN - SwapShort(&logicalheight); -#endif - } - RGBQUAD *globalpalette = NULL; - int globalpalette_size = 0; - if( FreeImage_GetMetadataEx(FIMD_ANIMATION, dib, "GlobalPalette", FIDT_PALETTE, &tag) ) { - globalpalette_size = FreeImage_GetTagCount(tag); - if( globalpalette_size >= 2 ) { - globalpalette = (RGBQUAD *)FreeImage_GetTagValue(tag); - } - } - - //Logical Screen Descriptor - io->write_proc(&logicalwidth, 2, 1, handle); - io->write_proc(&logicalheight, 2, 1, handle); - packed = GIF_PACKED_LSD_COLORRES; - b = 0; - RGBQUAD background_color; - if( globalpalette != NULL ) { - packed |= GIF_PACKED_LSD_HAVEGCT; - if( globalpalette_size < 4 ) { - globalpalette_size = 2; - packed |= 0 & GIF_PACKED_LSD_GCTSIZE; - } else if( globalpalette_size < 8 ) { - globalpalette_size = 4; - packed |= 1 & GIF_PACKED_LSD_GCTSIZE; - } else if( globalpalette_size < 16 ) { - globalpalette_size = 8; - packed |= 2 & GIF_PACKED_LSD_GCTSIZE; - } else if( globalpalette_size < 32 ) { - globalpalette_size = 16; - packed |= 3 & GIF_PACKED_LSD_GCTSIZE; - } else if( globalpalette_size < 64 ) { - globalpalette_size = 32; - packed |= 4 & GIF_PACKED_LSD_GCTSIZE; - } else if( globalpalette_size < 128 ) { - globalpalette_size = 64; - packed |= 5 & GIF_PACKED_LSD_GCTSIZE; - } else if( globalpalette_size < 256 ) { - globalpalette_size = 128; - packed |= 6 & GIF_PACKED_LSD_GCTSIZE; - } else { - globalpalette_size = 256; - packed |= 7 & GIF_PACKED_LSD_GCTSIZE; - } - if( FreeImage_GetBackgroundColor(dib, &background_color) ) { - for( int i = 0; i < globalpalette_size; i++ ) { - if( background_color.rgbRed == globalpalette[i].rgbRed && - background_color.rgbGreen == globalpalette[i].rgbGreen && - background_color.rgbBlue == globalpalette[i].rgbBlue ) { - - b = (BYTE)i; - break; - } - } - } - } else { - packed |= (bpp - 1) & GIF_PACKED_LSD_GCTSIZE; - } - io->write_proc(&packed, 1, 1, handle); - io->write_proc(&b, 1, 1, handle); - b = 0; - io->write_proc(&b, 1, 1, handle); - - //Global Color Table - if( globalpalette != NULL ) { - int i = 0; - while( i < globalpalette_size ) { - io->write_proc(&globalpalette[i].rgbRed, 1, 1, handle); - io->write_proc(&globalpalette[i].rgbGreen, 1, 1, handle); - io->write_proc(&globalpalette[i].rgbBlue, 1, 1, handle); - i++; - } - } - - //Application Extension - LONG loop = 0; - if( FreeImage_GetMetadataEx(FIMD_ANIMATION, dib, "Loop", FIDT_LONG, &tag) ) { - loop = *(LONG *)FreeImage_GetTagValue(tag); - } - if( loop != 1 ) { - //the Netscape extension is really "repeats" not "loops" - if( loop > 1 ) loop--; - if( loop > 0xFFFF ) loop = 0xFFFF; - w = (WORD)loop; -#ifdef FREEIMAGE_BIGENDIAN - SwapShort(&w); -#endif - io->write_proc((void *)"\x21\xFF\x0BNETSCAPE2.0\x03\x01", 16, 1, handle); - io->write_proc(&w, 2, 1, handle); - b = 0; - io->write_proc(&b, 1, 1, handle); - } - - //Comment Extension - FIMETADATA *mdhandle = NULL; - FITAG *tag = NULL; - mdhandle = FreeImage_FindFirstMetadata(FIMD_COMMENTS, dib, &tag); - if( mdhandle ) { - do { - if( FreeImage_GetTagType(tag) == FIDT_ASCII ) { - int length = FreeImage_GetTagLength(tag) - 1; - char *value = (char *)FreeImage_GetTagValue(tag); - io->write_proc((void *)"\x21\xFE", 2, 1, handle); - while( length > 0 ) { - b = (BYTE)(length >= 255 ? 255 : length); - io->write_proc(&b, 1, 1, handle); - io->write_proc(value, b, 1, handle); - value += b; - length -= b; - } - b = 0; - io->write_proc(&b, 1, 1, handle); - } - } while(FreeImage_FindNextMetadata(mdhandle, &tag)); - - FreeImage_FindCloseMetadata(mdhandle); - } - } - - //Graphic Control Extension - if( FreeImage_IsTransparent(dib) ) { - int count = FreeImage_GetTransparencyCount(dib); - BYTE *table = FreeImage_GetTransparencyTable(dib); - for( int i = 0; i < count; i++ ) { - if( table[i] == 0 ) { - have_transparent = true; - transparent_color = i; - break; - } - } - } - io->write_proc((void *)"\x21\xF9\x04", 3, 1, handle); - b = (BYTE)((disposal_method << 2) & GIF_PACKED_GCE_DISPOSAL); - if( have_transparent ) b |= GIF_PACKED_GCE_HAVETRANS; - io->write_proc(&b, 1, 1, handle); - //Notes about delay time for GIFs: - //IE5/IE6 have a minimum and default of 100ms - //Mozilla/Firefox/Netscape 6+/Opera have a minimum of 20ms and a default of 100ms if <20ms is specified or the GCE is absent - //Netscape 4 has a minimum of 10ms if 0ms is specified, but will use 0ms if the GCE is absent - w = (WORD)(delay_time / 10); //convert ms to cs -#ifdef FREEIMAGE_BIGENDIAN - SwapShort(&w); -#endif - io->write_proc(&w, 2, 1, handle); - b = (BYTE)transparent_color; - io->write_proc(&b, 1, 1, handle); - b = 0; - io->write_proc(&b, 1, 1, handle); - - //Image Descriptor - b = GIF_BLOCK_IMAGE_DESCRIPTOR; - io->write_proc(&b, 1, 1, handle); - io->write_proc(&left, 2, 1, handle); - io->write_proc(&top, 2, 1, handle); - io->write_proc(&width, 2, 1, handle); - io->write_proc(&height, 2, 1, handle); - packed = 0; - if( !no_local_palette ) packed |= GIF_PACKED_ID_HAVELCT | ((bpp - 1) & GIF_PACKED_ID_LCTSIZE); - if( interlaced ) packed |= GIF_PACKED_ID_INTERLACED; - io->write_proc(&packed, 1, 1, handle); - - //Local Color Table - if( !no_local_palette ) { - int palsize = 1 << bpp; - for( int i = 0; i < palsize; i++ ) { - io->write_proc(&pal[i].rgbRed, 1, 1, handle); - io->write_proc(&pal[i].rgbGreen, 1, 1, handle); - io->write_proc(&pal[i].rgbBlue, 1, 1, handle); - } - } - - - //LZW Minimum Code Size - b = (BYTE)(bpp == 1 ? 2 : bpp); - io->write_proc(&b, 1, 1, handle); - StringTable *stringtable = new(std::nothrow) StringTable; - stringtable->Initialize(b); - stringtable->CompressStart(bpp, width); - - //Image Data Sub-blocks - int y = 0, interlacepass = 0, line = FreeImage_GetLine(dib); - BYTE buf[255], *bufptr = buf; //255 is the max sub-block length - int size = sizeof(buf); - b = sizeof(buf); - while( y < output_height ) { - memcpy(stringtable->FillInputBuffer(line), FreeImage_GetScanLine(dib, output_height - y - 1), line); - while( stringtable->Compress(bufptr, &size) ) { - bufptr += size; - if( bufptr - buf == sizeof(buf) ) { - io->write_proc(&b, 1, 1, handle); - io->write_proc(buf, sizeof(buf), 1, handle); - size = sizeof(buf); - bufptr = buf; - } else { - size = (int)(sizeof(buf) - (bufptr - buf)); - } - } - if( interlaced ) { - y += g_GifInterlaceIncrement[interlacepass]; - if( y >= output_height && ++interlacepass < GIF_INTERLACE_PASSES ) { - y = g_GifInterlaceOffset[interlacepass]; - } - } else { - y++; - } - } - size = (int)(bufptr - buf); - BYTE last[4]; - w = (WORD)stringtable->CompressEnd(last); - if( size + w >= sizeof(buf) ) { - //one last full size sub-block - io->write_proc(&b, 1, 1, handle); - io->write_proc(buf, size, 1, handle); - io->write_proc(last, sizeof(buf) - size, 1, handle); - //and possibly a tiny additional sub-block - b = (BYTE)(w - (sizeof(buf) - size)); - if( b > 0 ) { - io->write_proc(&b, 1, 1, handle); - io->write_proc(last + w - b, b, 1, handle); - } - } else { - //last sub-block less than full size - b = (BYTE)(size + w); - io->write_proc(&b, 1, 1, handle); - io->write_proc(buf, size, 1, handle); - io->write_proc(last, w, 1, handle); - } - - //Block Terminator - b = 0; - io->write_proc(&b, 1, 1, handle); - - delete stringtable; - - } catch (const char *msg) { - FreeImage_OutputMessageProc(s_format_id, msg); - return FALSE; - } - - return TRUE; -} - -// ========================================================== -// Init -// ========================================================== - -void DLL_CALLCONV -InitGIF(Plugin *plugin, int format_id) { - s_format_id = format_id; - - plugin->format_proc = Format; - plugin->description_proc = Description; - plugin->extension_proc = Extension; - plugin->regexpr_proc = RegExpr; - plugin->open_proc = Open; - plugin->close_proc = Close; - plugin->pagecount_proc = PageCount; - plugin->pagecapability_proc = NULL; - plugin->load_proc = Load; - plugin->save_proc = Save; - plugin->validate_proc = Validate; - plugin->mime_proc = MimeType; - plugin->supports_export_bpp_proc = SupportsExportDepth; - plugin->supports_export_type_proc = SupportsExportType; - plugin->supports_icc_profiles_proc = NULL; -} |