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XeeSWFSource.m
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XeeSWFSource.m
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#import "XeeSWFSource.h"
#import "XeeJPEGLoader.h"
#import "XeeRawImage.h"
#import "XeeIndexedRawImage.h"
#import <XADMaster/CSMultiHandle.h>
#import <XADMaster/CSZlibHandle.h>
@implementation XeeSWFSource
+(NSArray *)fileTypes
{
return [NSArray arrayWithObject:@"swf"];
}
-(id)initWithFile:(NSString *)swfname
{
if(self=[super init])
{
filename=[swfname retain];
parser=nil;
[self setIcon:[[NSWorkspace sharedWorkspace] iconForFile:filename]];
[icon setSize:NSMakeSize(16,16)];
@try
{
parser=[[SWFParser parserForPath:filename] retain];
}
@catch(id e) {}
if(parser) return self;
}
[self release];
return nil;
}
-(void)dealloc
{
[filename release];
[parser release];
[super dealloc];
}
-(void)start
{
[self startListUpdates];
@try
{
CSMemoryHandle *jpegtables=nil;
CSHandle *fh=[parser handle];
int tag,n=0;
while(tag=[parser nextTag])
switch(tag)
{
case SWFJPEGTables:
jpegtables=[CSMemoryHandle memoryHandleForReadingData:[fh readDataOfLength:[parser tagLength]-2]];
break;
case SWFDefineBitsJPEGTag:
{
[fh skipBytes:4];
CSHandle *subhandle=[fh subHandleOfLength:[parser tagBytesLeft]];
[self addEntry:[[[XeeSWFJPEGEntry alloc] initWithHandle:
[CSMultiHandle multiHandleWithHandles:[[jpegtables copy] autorelease],subhandle,nil]
name:[NSString stringWithFormat:@"Image %d",n++]] autorelease]];
}
break;
case SWFDefineBitsJPEG3Tag:
case SWFDefineBitsJPEG2Tag:
{
[fh skipBytes:2];
int alphaoffs=0;
if(tag==SWFDefineBitsJPEG3Tag) alphaoffs=[fh readUInt32LE];
int first=[fh readUInt16BE];
if(first==0xffd9)
{
[fh skipBytes:2];
[self addEntry:[[[XeeSWFJPEGEntry alloc] initWithHandle:
[fh subHandleOfLength:[parser tagBytesLeft]]
name:[NSString stringWithFormat:@"Image %d",n++]] autorelease]];
}
else if(first==0xffd8)
{
CSMemoryHandle *tables=[CSMemoryHandle memoryHandleForWriting];
[tables writeUInt16BE:first];
for(;;)
{
int marker=[fh readUInt16BE];
if(marker==0xffd9||marker==0xffda)
{
if(marker==0xffd9) [fh skipBytes:2];
else [tables writeUInt16BE:marker];
[tables seekToFileOffset:0];
CSHandle *subhandle=[fh subHandleOfLength:[parser tagBytesLeft]];
[self addEntry:[[[XeeSWFJPEGEntry alloc] initWithHandle:
[CSMultiHandle multiHandleWithHandles:tables,subhandle,nil]
name:[NSString stringWithFormat:@"Image %d",n++]] autorelease]];
break;
}
else
{
int len=[fh readUInt16BE];
[tables writeUInt16BE:marker];
[tables writeUInt16BE:len];
for(int i=0;i<len-2;i++) [tables writeUInt8:[fh readUInt8]];
}
}
}
else NSLog(@"Error loading SWF file: invalid JPEG data in tag %d",[parser tag]);
}
break;
case SWFDefineBitsLosslessTag:
case SWFDefineBitsLossless2Tag:
{
[fh skipBytes:2];
int formatnum=[fh readUInt8];
switch(formatnum)
{
case 3:
if(tag==SWFDefineBitsLosslessTag)
[self addEntry:[[[XeeSWFLossless3Entry alloc] initWithHandle:
[fh subHandleOfLength:[parser tagBytesLeft]]
name:[NSString stringWithFormat:@"Image %d",n++]] autorelease]];
else
[self addEntry:[[[XeeSWFLossless3AlphaEntry alloc] initWithHandle:
[fh subHandleOfLength:[parser tagBytesLeft]]
name:[NSString stringWithFormat:@"Image %d",n++]] autorelease]];
break;
case 4:
NSLog(@"Error loading SWF file: unsupported lossless format 4. Please send the author of this program the file, so he can add support for it.");
break;
case 5:
if(tag==SWFDefineBitsLosslessTag)
[self addEntry:[[[XeeSWFLossless5Entry alloc] initWithHandle:
[fh subHandleOfLength:[parser tagBytesLeft]]
name:[NSString stringWithFormat:@"Image %d",n++]] autorelease]];
else
[self addEntry:[[[XeeSWFLossless5AlphaEntry alloc] initWithHandle:
[fh subHandleOfLength:[parser tagBytesLeft]]
name:[NSString stringWithFormat:@"Image %d",n++]] autorelease]];
break;
default:
NSLog(@"Error loading SWF file: unsupported lossless format %d",formatnum);
break;
}
}
break;
}
}
@catch(id e)
{
NSLog(@"Error parsing SWF file %@: %@",filename,e);
}
[self endListUpdates];
[self pickImageAtIndex:0];
[parser release];
parser=nil;
}
-(NSString *)representedFilename { return filename; }
-(BOOL)canBrowse { return YES; }
@end
@implementation XeeSWFEntry
-(id)initWithHandle:(CSHandle *)handle name:(NSString *)descname
{
if(self=[super init])
{
originalhandle=[handle retain];
name=[descname retain];
}
return self;
}
-(void)dealloc
{
[originalhandle release];
[name release];
[super dealloc];
}
-(NSString *)descriptiveName { return name; }
-(CSHandle *)newHandle { return [[originalhandle copy] autorelease]; }
@end
@implementation XeeSWFJPEGEntry
-(XeeImage *)produceImage
{
XeeJPEGImage *image=[[[XeeJPEGImage alloc] initWithHandle:[self newHandle]] autorelease];
[image setFormat:@"SWF JPEG"];
return image;
}
@end
@implementation XeeSWFLossless3Entry
-(XeeImage *)produceImage
{
CSHandle *fh=[self newHandle];
int framewidth=[fh readUInt16LE];
int frameheight=[fh readUInt16LE];
int numcols=[fh readUInt8];
CSZlibHandle *zh=[CSZlibHandle zlibHandleWithHandle:fh];
XeePalette *pal=[XeePalette palette];
for(int i=0;i<numcols+1;i++)
[pal setColourAtIndex:i red:[zh readUInt8] green:[zh readUInt8] blue:[zh readUInt8]];
XeeIndexedRawImage *image=[[[XeeIndexedRawImage alloc] initWithHandle:zh width:framewidth height:frameheight
palette:pal bytesPerRow:(framewidth+3)&~3] autorelease];
[image setDepthIndexed:numcols+1];
[image setFormat:@"SWF Lossless"];
return image;
}
@end
@implementation XeeSWFLossless3AlphaEntry
-(XeeImage *)produceImage
{
CSHandle *fh=[self newHandle];
int framewidth=[fh readUInt16LE];
int frameheight=[fh readUInt16LE];
int numcols=[fh readUInt8];
CSZlibHandle *zh=[CSZlibHandle zlibHandleWithHandle:fh];
XeePalette *pal=[XeePalette palette];
for(int i=0;i<numcols+1;i++)
[pal setColourAtIndex:i red:[zh readUInt8] green:[zh readUInt8] blue:[zh readUInt8] alpha:[zh readUInt8]];
XeeIndexedRawImage *image=[[[XeeIndexedRawImage alloc] initWithHandle:zh width:framewidth height:frameheight
palette:pal bytesPerRow:(framewidth+3)&~3] autorelease];
[image setDepthIndexed:numcols+1];
[image setFormat:@"SWF Lossless"];
return image;
}
@end
@implementation XeeSWFLossless5Entry
-(XeeImage *)produceImage
{
CSHandle *fh=[self newHandle];
int framewidth=[fh readUInt16LE];
int frameheight=[fh readUInt16LE];
CSZlibHandle *zh=[CSZlibHandle zlibHandleWithHandle:fh];
XeeRawImage *image=[[[XeeRawImage alloc] initWithHandle:zh width:framewidth height:frameheight
depth:8 colourSpace:XeeRGBRawColourSpace flags:XeeAlphaFirstRawFlag|XeeSkipAlphaRawFlag] autorelease];
[image setDepthRGB:8 alpha:NO floating:NO];
[image setFormat:@"SWF Lossless"];
return image;
}
@end
@implementation XeeSWFLossless5AlphaEntry
-(XeeImage *)produceImage
{
CSHandle *fh=[self newHandle];
int framewidth=[fh readUInt16LE];
int frameheight=[fh readUInt16LE];
CSZlibHandle *zh=[CSZlibHandle zlibHandleWithHandle:fh];
XeeRawImage *image=[[[XeeRawImage alloc] initWithHandle:zh width:framewidth height:frameheight
depth:8 colourSpace:XeeRGBRawColourSpace flags:XeeAlphaFirstRawFlag] autorelease];
[image setDepthRGB:8 alpha:YES floating:NO];
[image setFormat:@"SWF Lossless"];
return image;
}
@end