Alien-FreeImage
view release on metacpan or search on metacpan
src/Source/FreeImage/PluginGIF.cpp view on Meta::CPAN
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;
src/Source/FreeImage/PluginGIF.cpp view on Meta::CPAN
}
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", 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;
src/Source/FreeImage/PluginGIF.cpp view on Meta::CPAN
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++;
}
( run in 0.800 second using v1.01-cache-2.11-cpan-787462296c9 )