#include "AppKit/AppKitExceptions.h"
#include "AppKit/NSGraphics.h"
#include "AppKit/NSGraphicsContext.h"
#include "AppKit/NSPasteboard.h"
#include "AppKit/NSView.h"
#include "GSGuiPrivate.h"
#include "nsimage-tiff.h"
/* Maximum number of planes */
#define MAX_PLANES 5
/* FIXME: By default the libtiff library (v3.5.7 and less at least) do
not support LZW compression, but it's not possible to find out if it
does or not until after we've already written an image :-(. */
static BOOL supports_lzw_compression = NO;
/* Backend methods (optional) */
@interface NSBitmapImageRep (GSPrivate)
// GNUstep extension
- _initFromTIFFImage: (TIFF *)image number: (int)imageNumber;
// Internal
- (int) _localFromCompressionType: (NSTIFFCompression)type;
- (NSTIFFCompression) _compressionTypeFromLocal: (int)type;
@end
/**
Class Description
NSBitmapImageRep is an image representation for handling images composed
of pixels. The standard image format for NSBitmapImageRep is the TIFF
format. However, through the use of image filters and other methods, many
other standard image formats can be handled by NSBitmapImageRep.
Images are typically handled through the NSImage class and there is often
no need to use the NSBitmapImageRep class directly. However there may
be cases where you want to manipulate the image bitmap data directly.
*/
@implementation NSBitmapImageRep
/** Returns YES if the image stored in data can be read and decoded */
+ (BOOL) canInitWithData: (NSData *)data
{
TIFF *image = NULL;
if (data == nil)
{
return NO;
}
if ([self _bitmapIsPNG: data])
return YES;
if ([self _bitmapIsPNM: data])
return YES;
if ([self _bitmapIsJPEG: data])
return YES;
if ([self _bitmapIsGIF: data])
return YES;
image = NSTiffOpenDataRead ((char *)[data bytes], [data length]);
if (image != NULL)
{
NSTiffClose (image);
return YES;
}
else
{
return NO;
}
}
/** Returns a list of image filename extensions that are understood by
NSBitmapImageRep. */
+ (NSArray *) imageUnfilteredFileTypes
{
static NSArray *types = nil;
if (types == nil)
{
types = [[NSArray alloc] initWithObjects:
@"tiff", @"tif",
@"pnm", @"ppm",
#if HAVE_LIBUNGIF || HAVE_LIBGIF
@"gif",
#endif
#if HAVE_LIBJPEG
@"jpeg", @"jpg",
#endif
#if HAVE_LIBPNG
@"png",
#endif
nil];
}
return types;
}
/** Returns a list of image pasteboard types that are understood by
NSBitmapImageRep. */
+ (NSArray *) imageUnfilteredPasteboardTypes
{
static NSArray *types = nil;
if (types == nil)
{
types = [[NSArray alloc] initWithObjects: NSTIFFPboardType, nil];
}
return types;
}
/** Returns a newly allocated NSBitmapImageRep object representing the
image stored in imageData. If the image data contains more than one
image, the first one is choosen. */
+ (id) imageRepWithData: (NSData *)imageData
{
NSArray* array;
array = [self imageRepsWithData: imageData];
if ([array count])
{
return [array objectAtIndex: 0];
}
return nil;
}
/** Returns an array containing newly allocated NSBitmapImageRep
objects representing the images stored in imageData. */
+ (NSArray*) imageRepsWithData: (NSData *)imageData
{
int i, images;
TIFF *image;
NSMutableArray *array;
if (imageData == nil)
{
NSLog(@"NSBitmapImageRep: nil image data");
return [NSArray array];
}
if ([self _bitmapIsPNG: imageData])
{
NSBitmapImageRep *rep;
NSArray *a;
rep=[[self alloc] _initBitmapFromPNG: imageData];
if (!rep)
return [NSArray array];
a = [NSArray arrayWithObject: rep];
DESTROY(rep);
return a;
}
if ([self _bitmapIsPNM: imageData])
{
NSBitmapImageRep *rep;
NSArray *a;
rep=[[self alloc] _initBitmapFromPNM: imageData
errorMessage: NULL];
if (!rep)
return [NSArray array];
a = [NSArray arrayWithObject: rep];
DESTROY(rep);
return a;
}
if ([self _bitmapIsJPEG: imageData])
{
NSBitmapImageRep *rep;
NSArray *a;
rep=[[self alloc] _initBitmapFromJPEG: imageData
errorMessage: NULL];
if (!rep)
return [NSArray array];
a = [NSArray arrayWithObject: rep];
DESTROY(rep);
return a;
}
if ([self _bitmapIsGIF: imageData])
{
NSBitmapImageRep *rep;
NSArray *a;
rep=[[self alloc] _initBitmapFromGIF: imageData
errorMessage: NULL];
if (!rep)
return [NSArray array];
a = [NSArray arrayWithObject: rep];
DESTROY(rep);
return a;
}
image = NSTiffOpenDataRead((char *)[imageData bytes], [imageData length]);
if (image == NULL)
{
NSLog(@"NSBitmapImageRep: unable to parse TIFF data");
return [NSArray array];
}
images = NSTiffGetImageCount(image);
NSDebugLLog(@"NSImage", @"Image contains %d directories", images);
array = [NSMutableArray arrayWithCapacity: images];
for (i = 0; i < images; i++)
{
NSBitmapImageRep* imageRep;
imageRep = [[self alloc] _initFromTIFFImage: image number: i];
if (imageRep)
{
[array addObject: AUTORELEASE(imageRep)];
}
}
NSTiffClose(image);
return array;
}
/** Loads only the default (first) image from the TIFF image contained in
data. */
- (id) initWithData: (NSData *)imageData
{
TIFF *image;
if (imageData == nil)
{
RELEASE(self);
return nil;
}
if ([isa _bitmapIsPNG: imageData])
return [self _initBitmapFromPNG: imageData];
if ([isa _bitmapIsPNM: imageData])
return [self _initBitmapFromPNM: imageData
errorMessage: NULL];
if ([isa _bitmapIsJPEG: imageData])
return [self _initBitmapFromJPEG: imageData
errorMessage: NULL];
if ([isa _bitmapIsGIF: imageData])
return [self _initBitmapFromGIF: imageData
errorMessage: NULL];
image = NSTiffOpenDataRead((char *)[imageData bytes], [imageData length]);
if (image == NULL)
{
RELEASE(self);
NSLog(@"Tiff read invalid TIFF info from data");
return nil;
}
[self _initFromTIFFImage:image number: -1];
NSTiffClose(image);
return self;
}
- (id) initWithFocusedViewRect: (NSRect)rect
{
int bps, spp, alpha;
NSSize size;
NSString *space;
unsigned char *planes[4];
NSDictionary *dict;
dict = [GSCurrentContext() GSReadRect: rect];
if (dict == nil)
{
NSLog(@"NSBitmapImageRep initWithFocusedViewRect: failed");
RELEASE(self);
return nil;
}
_imageData = RETAIN([dict objectForKey: @"Data"]);
if (_imageData == nil)
{
NSLog(@"NSBitmapImageRep initWithFocusedViewRect: failed");
RELEASE(self);
return nil;
}
bps = [[dict objectForKey: @"BitsPerSample"] intValue];
if (bps == 0)
bps = 8;
spp = [[dict objectForKey: @"SamplesPerPixel"] intValue];
alpha = [[dict objectForKey: @"HasAlpha"] intValue];
size = [[dict objectForKey: @"Size"] sizeValue];
space = [dict objectForKey: @"ColorSpace"];
planes[0] = (unsigned char *)[_imageData bytes];
self = [self initWithBitmapDataPlanes: planes
pixelsWide: size.width
pixelsHigh: size.height
bitsPerSample: bps
samplesPerPixel: spp
hasAlpha: (alpha) ? YES : NO
isPlanar: NO
colorSpaceName: space
bytesPerRow: 0
bitsPerPixel: 0];
return self;
}
/**
Initializes a newly created NSBitmapImageRep object to hold image data
specified in the planes buffer and organized according to the
additional arguments passed into the method.
The planes argument is an array of char pointers where each array
holds a single component or plane of data. Note that if data is
passed into the method via planes, the data is NOT copied and not
freed when the object is deallocated. It is assumed that the data
will always be available. If planes is NULL, then a suitable amount
of memory will be allocated to store the information needed. One can
then obtain a pointer to the planes data using the -bitmapData or
-getBitmapDataPlanes: method.
Each component of the data is in "standard" order, such as red, green,
blue for RGB color images. The transparency component, if these is one, should
always be last.
The other arguments to the method consist of:
width and height
The width and height of the image in pixels
bps
The bits per sample or the number of bits used to store a number in
one component of one pixel of the image. Typically this is 8 (bits)
but can be 2 or 4, although not all values are supported.
spp
Samples per pixel, or the number of components of color in the pixel.
For instance this would be 4 for an RGB image with transparency.
alpha
Set to YES if the image has a transparency component.
isPlanar
Set to YES if the data is arranged in planes, i.e. one component
per buffer as stored in the planes array. If NO, then the image data
is mixed in one buffer. For instance, for RGB data, the first sample
would contain red, then next green, then blue, followed by red for the
next pixel.
colorSpaceName
This argument specifies how the data values are to be interpreted.
Possible values include the typical colorspace names (although
not all values are currently supported)
rowBytes
Specifies the number of bytes contained in a single scan line of the
data. Normally this can be computed from the width of the image,
the samples per pixel and the bits per sample. However, if the data
is aligned along word boundaries, this value may differ from this.
If rowBytes is 0, the method will calculate the value assuming there
are no extra bytes at the end of the scan line.
pixelBits
This is normally bps for planar data and bps times spp for non-planar
data, but sometimes images have extra bits. If pixelBits is 0 it
will be calculated as described above.
*/
- (id) initWithBitmapDataPlanes: (unsigned char **)planes
pixelsWide: (int)width
pixelsHigh: (int)height
bitsPerSample: (int)bps
samplesPerPixel: (int)spp
hasAlpha: (BOOL)alpha
isPlanar: (BOOL)isPlanar
colorSpaceName: (NSString *)colorSpaceName
bytesPerRow: (int)rowBytes
bitsPerPixel: (int)pixelBits
{
if (!bps || !spp || !width || !height)
{
[NSException raise: NSInvalidArgumentException
format: @"Required arguments not specified creating NSBitmapImageRep"];
}
_pixelsWide = width;
_pixelsHigh = height;
_size.width = width;
_size.height = height;
_bitsPerSample = bps;
_numColors = spp;
_hasAlpha = alpha;
_isPlanar = isPlanar;
_colorSpace = RETAIN(colorSpaceName);
if (!pixelBits)
pixelBits = bps * ((_isPlanar) ? 1 : spp);
_bitsPerPixel = pixelBits;
if (!rowBytes)
rowBytes = ceil((float)width * _bitsPerPixel / 8);
_bytesPerRow = rowBytes;
_imagePlanes = NSZoneMalloc([self zone], sizeof(unsigned char*) * MAX_PLANES);
if (planes)
{
unsigned int i;
for (i = 0; i < MAX_PLANES; i++)
_imagePlanes[i] = NULL;
for (i = 0; i < ((_isPlanar) ? _numColors : 1); i++)
_imagePlanes[i] = planes[i];
}
else
{
unsigned char* bits;
long length;
unsigned int i;
// No image data was given, allocate it.
length = (long)((_isPlanar) ? _numColors : 1) * _bytesPerRow *
_pixelsHigh * sizeof(unsigned char);
_imageData = [[NSMutableData alloc] initWithLength: length];
bits = [_imageData mutableBytes];
_imagePlanes[0] = bits;
if (_isPlanar)
{
for (i=1; i < _numColors; i++)
_imagePlanes[i] = bits + i*_bytesPerRow * _pixelsHigh;
for (i= _numColors; i < MAX_PLANES; i++)
_imagePlanes[i] = NULL;
}
else
{
for (i= 1; i < MAX_PLANES; i++)
_imagePlanes[i] = NULL;
}
}
if (alpha)
{
unsigned char *bData = (unsigned char*)[self bitmapData];
BOOL allOpaque = YES;
unsigned offset = _numColors - 1;
unsigned limit = _size.height * _size.width;
unsigned i;
for (i = 0; i < limit; i++)
{
unsigned a;
bData += offset;
a = *bData++;
if (a != 255)
{
allOpaque = NO;
break;
}
}
[self setOpaque: allOpaque];
}
else
{
[self setOpaque: YES];
}
return self;
}
- (void)colorizeByMappingGray:(float)midPoint
toColor:(NSColor *)midPointColor
blackMapping:(NSColor *)shadowColor
whiteMapping:(NSColor *)lightColor
{
// TODO
}
- (id)initWithBitmapHandle:(void *)bitmap
{
// TODO Only needed on MS Windows
RELEASE(self);
return nil;
}
- (id)initWithIconHandle:(void *)icon
{
// TODO Only needed on MS Windows
RELEASE(self);
return nil;
}
- (void) dealloc
{
NSZoneFree([self zone],_imagePlanes);
RELEASE(_imageData);
[super dealloc];
}
//
// Getting Information about the Image
//
/** Returns the number of bits need to contain one pixels worth of data.
This is normally the number of samples per pixel times the number of
bits in one sample. */
- (int) bitsPerPixel
{
return _bitsPerPixel;
}
/** Returns the number of samples in a pixel. For instance, a normal RGB
image with transparency would have a samplesPerPixel of 4. */
- (int) samplesPerPixel
{
return _numColors;
}
/** Returns YES if the image components are stored separately. Returns
NO if the components are meshed (i.e. all the samples for one pixel
come before the next pixel). */
- (BOOL) isPlanar
{
return _isPlanar;
}
/** Returns the number of planes in an image. Typically this is
equal to the number of samples in a planar image or 1 for a non-planar
image. */
- (int) numberOfPlanes
{
return (_isPlanar) ? _numColors : 1;
}
/** Returns the number of bytes in a plane. This is the number of bytes
in a row times tne height of the image. */
- (int) bytesPerPlane
{
return _bytesPerRow*_pixelsHigh;
}
/** Returns the number of bytes in a row. This is typically based on the
width of the image and the bits per sample and samples per pixel (if
in medhed configuration). However it may differ from this if set
explicitly in -initWithBitmapDataPlanes:pixelsWide:pixelsHigh:bitsPerSample:samplesPerPixel:hasAlpha:isPlanar:colorSpaceName:bytesPerRow:bitsPerPixel:.
*/
- (int) bytesPerRow
{
return _bytesPerRow;
}
//
// Getting Image Data
//
/** Returns the first plane of data representing the image. */
- (unsigned char *) bitmapData
{
unsigned char *planes[MAX_PLANES];
[self getBitmapDataPlanes: planes];
return planes[0];
}
/** Files the array data with pointers to each of the data planes
representing the image. The data array must be allocated to contain
at least -samplesPerPixel pointers. */
- (void) getBitmapDataPlanes: (unsigned char **)data
{
unsigned int i;
if (data)
{
for (i = 0; i < _numColors; i++)
{
data[i] = _imagePlanes[i];
}
}
}
/** Draws the image in the current window according the information
from the current gState, including information about the current
point, scaling, etc. */
- (BOOL) draw
{
NSRect irect = NSMakeRect(0, 0, _size.width, _size.height);
NSDrawBitmap(irect,
_pixelsWide,
_pixelsHigh,
_bitsPerSample,
_numColors,
_bitsPerPixel,
_bytesPerRow,
_isPlanar,
_hasAlpha,
_colorSpace,
(const unsigned char **)_imagePlanes);
return YES;
}
//
// Producing a TIFF Representation of the Image
//
/** Produces an NSData object containing a TIFF representation of all
the images stored in anArray. BUGS: Currently this only works if the
images are NSBitmapImageRep objects, and it only creates an TIFF from the
first image in the array. */
+ (NSData*) TIFFRepresentationOfImageRepsInArray: (NSArray *)anArray
{
//FIXME: This only outputs one of the ImageReps
NSEnumerator *enumerator = [anArray objectEnumerator];
NSImageRep *rep;
while ((rep = [enumerator nextObject]) != nil)
{
if ([rep isKindOfClass: self])
{
return [(NSBitmapImageRep*)rep TIFFRepresentation];
}
}
return nil;
}
/** Produces an NSData object containing a TIFF representation of all
the images stored in anArray. The image is compressed according to
the compression type and factor. BUGS: Currently this only works if
the images are NSBitmapImageRep objects, and it only creates an
TIFF from the first image in the array. */
+ (NSData*) TIFFRepresentationOfImageRepsInArray: (NSArray *)anArray
usingCompression: (NSTIFFCompression)type
factor: (float)factor
{
//FIXME: This only outputs one of the ImageReps
NSEnumerator *enumerator = [anArray objectEnumerator];
NSImageRep *rep;
while ((rep = [enumerator nextObject]) != nil)
{
if ([rep isKindOfClass: self])
{
return [(NSBitmapImageRep*)rep TIFFRepresentationUsingCompression: type
factor: factor];
}
}
return nil;
}
/** Returns an NSData object containing a TIFF representation of the
receiver. */
- (NSData*) TIFFRepresentation
{
if ([self canBeCompressedUsing: _compression] == NO)
{
[self setCompression: NSTIFFCompressionNone factor: 0];
}
return [self TIFFRepresentationUsingCompression: _compression
factor: _comp_factor];
}
/** Returns an NSData object containing a TIFF representation of the
receiver. The TIFF data is compressed using compresssion type
and factor. */
- (NSData*) TIFFRepresentationUsingCompression: (NSTIFFCompression)type
factor: (float)factor
{
NSTiffInfo info;
TIFF *image;
char *bytes = 0;
long length = 0;
info.imageNumber = 0;
info.subfileType = 255;
info.width = _pixelsWide;
info.height = _pixelsHigh;
info.bitsPerSample = _bitsPerSample;
info.samplesPerPixel = _numColors;
if ([self canBeCompressedUsing: type] == NO)
{
type = NSTIFFCompressionNone;
factor = 0;
}
if (_isPlanar)
info.planarConfig = PLANARCONFIG_SEPARATE;
else
info.planarConfig = PLANARCONFIG_CONTIG;
if ([_colorSpace isEqual: NSDeviceRGBColorSpace]
|| [_colorSpace isEqual: NSCalibratedRGBColorSpace])
info.photoInterp = PHOTOMETRIC_RGB;
else if ([_colorSpace isEqual: NSDeviceWhiteColorSpace]
|| [_colorSpace isEqual: NSCalibratedWhiteColorSpace])
info.photoInterp = PHOTOMETRIC_MINISBLACK;
else if ([_colorSpace isEqual: NSDeviceBlackColorSpace]
|| [_colorSpace isEqual: NSCalibratedBlackColorSpace])
info.photoInterp = PHOTOMETRIC_MINISWHITE;
else
{
NSWarnMLog(@"Unknown colorspace %@.", _colorSpace);
info.photoInterp = PHOTOMETRIC_RGB;
}
info.extraSamples = (_hasAlpha) ? 1 : 0;
info.compression = [self _localFromCompressionType: type];
if (factor < 0)
factor = 0;
if (factor > 255)
factor = 255;
info.quality = (1 - ((float)factor)/255.0) * 100;
info.numImages = 1;
info.error = 0;
image = NSTiffOpenDataWrite(&bytes, &length);
if (image == 0)
{
[NSException raise: NSTIFFException
format: @"Opening data stream for writting"];
}
if (NSTiffWrite(image, &info, [self bitmapData]) != 0)
{
[NSException raise: NSTIFFException format: @"Writing data"];
}
NSTiffClose(image);
return [NSData dataWithBytesNoCopy: bytes length: length];
}
+ (NSData *)representationOfImageRepsInArray:(NSArray *)imageReps
usingType:(NSBitmapImageFileType)storageType
properties:(NSDictionary *)properties
{
// TODO
return nil;
}
- (NSData *)representationUsingType:(NSBitmapImageFileType)storageType
properties:(NSDictionary *)properties
{
// TODO
return nil;
}
//
// Setting and Checking Compression Types
//
+ (void) getTIFFCompressionTypes: (const NSTIFFCompression **)list
count: (int *)numTypes
{
static NSTIFFCompression types[] = {
NSTIFFCompressionNone,
NSTIFFCompressionCCITTFAX3,
NSTIFFCompressionCCITTFAX4,
NSTIFFCompressionLZW,
NSTIFFCompressionJPEG,
NSTIFFCompressionNEXT,
NSTIFFCompressionPackBits,
NSTIFFCompressionOldJPEG
};
if (list)
*list = types;
if (numTypes)
*numTypes = sizeof(types)/sizeof(*types);
}
+ (NSString*) localizedNameForTIFFCompressionType: (NSTIFFCompression)type
{
switch (type)
{
case NSTIFFCompressionNone: return _(@"No Compression");
case NSTIFFCompressionCCITTFAX3: return _(@"CCITTFAX3 Compression");
case NSTIFFCompressionCCITTFAX4: return _(@"CCITTFAX4 Compression");
case NSTIFFCompressionLZW: return _(@"LZW Compression");
case NSTIFFCompressionJPEG: return _(@"JPEG Compression");
case NSTIFFCompressionNEXT: return _(@"NEXT Compression");
case NSTIFFCompressionPackBits: return _(@"PackBits Compression");
case NSTIFFCompressionOldJPEG: return _(@"Old JPEG Compression");
default: return nil;
}
}
/** Returns YES if the receiver can be stored in a representation
compressed using the compression type. */
- (BOOL) canBeCompressedUsing: (NSTIFFCompression)compression
{
BOOL does;
switch (compression)
{
case NSTIFFCompressionCCITTFAX3:
case NSTIFFCompressionCCITTFAX4:
if (_numColors == 1 && _bitsPerSample == 1)
does = YES;
else
does = NO;
break;
case NSTIFFCompressionLZW:
does = supports_lzw_compression;
break;
case NSTIFFCompressionNone:
case NSTIFFCompressionJPEG:
case NSTIFFCompressionPackBits:
case NSTIFFCompressionOldJPEG:
does = YES;
break;
case NSTIFFCompressionNEXT:
default:
does = NO;
}
return does;
}
/** Returns the receivers compression and compression factor, which is
set either when the image is read in or by -setCompression:factor:.
Factor is ignored in many compression schemes. For JPEG compression,
factor can be any value from 0 to 255, with 255 being the maximum
compression. */
- (void) getCompression: (NSTIFFCompression*)compression
factor: (float*)factor
{
*compression = _compression;
*factor = _comp_factor;
}
- (void) setCompression: (NSTIFFCompression)compression
factor: (float)factor
{
_compression = compression;
_comp_factor = factor;
}
- (void)setProperty:(NSString *)property withValue:(id)value
{
// TODO
}
- (id)valueForProperty:(NSString *)property
{
// TODO
return nil;
}
// NSCopying protocol
- (id) copyWithZone: (NSZone *)zone
{
NSBitmapImageRep *copy;
copy = (NSBitmapImageRep*)[super copyWithZone: zone];
copy->_imageData = [_imageData copyWithZone: zone];
copy->_imagePlanes = NSZoneMalloc(zone, sizeof(unsigned char*) * MAX_PLANES);
if (_imageData == nil)
{
memcpy(copy->_imagePlanes, _imagePlanes, sizeof(unsigned char*) * MAX_PLANES);
}
else
{
unsigned char* bits;
unsigned int i;
bits = [copy->_imageData mutableBytes];
copy->_imagePlanes[0] = bits;
if (_isPlanar)
{
for (i=1; i < _numColors; i++)
copy->_imagePlanes[i] = bits + i*_bytesPerRow * _pixelsHigh;
for (i= _numColors; i < MAX_PLANES; i++)
copy->_imagePlanes[i] = NULL;
}
else
{
for (i= 1; i < MAX_PLANES; i++)
copy->_imagePlanes[i] = NULL;
}
}
return copy;
}
//
// NSCoding protocol
//
- (void) encodeWithCoder: (NSCoder*)aCoder
{
NSData *data = [self TIFFRepresentation];
[super encodeWithCoder: aCoder];
[aCoder encodeObject: data];
}
- (id) initWithCoder: (NSCoder*)aDecoder
{
NSData *data;
self = [super initWithCoder: aDecoder];
if ([aDecoder allowsKeyedCoding])
{
data = [aDecoder decodeObjectForKey: @"NSTIFFRepresentation"];
}
else
{
data = [aDecoder decodeObject];
}
return [self initWithData: data];
}
@end
@implementation NSBitmapImageRep (GSPrivate)
- (int) _localFromCompressionType: (NSTIFFCompression)type
{
switch (type)
{
case NSTIFFCompressionNone: return COMPRESSION_NONE;
case NSTIFFCompressionCCITTFAX3: return COMPRESSION_CCITTFAX3;
case NSTIFFCompressionCCITTFAX4: return COMPRESSION_CCITTFAX4;
case NSTIFFCompressionLZW: return COMPRESSION_LZW;
case NSTIFFCompressionJPEG: return COMPRESSION_JPEG;
case NSTIFFCompressionNEXT: return COMPRESSION_NEXT;
case NSTIFFCompressionPackBits: return COMPRESSION_PACKBITS;
case NSTIFFCompressionOldJPEG: return COMPRESSION_OJPEG;
default:
break;
}
return COMPRESSION_NONE;
}
- (NSTIFFCompression) _compressionTypeFromLocal: (int)type
{
switch (type)
{
case COMPRESSION_NONE: return NSTIFFCompressionNone;
case COMPRESSION_CCITTFAX3: return NSTIFFCompressionCCITTFAX3;
case COMPRESSION_CCITTFAX4: return NSTIFFCompressionCCITTFAX4;
case COMPRESSION_LZW: return NSTIFFCompressionLZW;
case COMPRESSION_JPEG: return NSTIFFCompressionJPEG;
case COMPRESSION_NEXT: return NSTIFFCompressionNEXT;
case COMPRESSION_PACKBITS: return NSTIFFCompressionPackBits;
case COMPRESSION_OJPEG: return NSTIFFCompressionOldJPEG;
default:
break;
}
return NSTIFFCompressionNone;
}
/* Given a TIFF image (from the libtiff library), load the image information
into our data structure. Reads the specified image. */
- _initFromTIFFImage: (TIFF *)image number: (int)imageNumber
{
NSString* space;
NSTiffInfo* info;
/* Seek to the correct image and get the dictionary information */
info = NSTiffGetInfo(imageNumber, image);
if (!info)
{
RELEASE(self);
NSLog(@"Tiff read invalid TIFF info in directory %d", imageNumber);
return nil;
}
/* 8-bit RGB will be converted to 24-bit by the tiff routines, so account
for this. */
space = nil;
switch(info->photoInterp)
{
case PHOTOMETRIC_MINISBLACK: space = NSDeviceWhiteColorSpace; break;
case PHOTOMETRIC_MINISWHITE: space = NSDeviceBlackColorSpace; break;
case PHOTOMETRIC_RGB: space = NSDeviceRGBColorSpace; break;
case PHOTOMETRIC_PALETTE:
space = NSDeviceRGBColorSpace;
info->samplesPerPixel = 3;
break;
default:
break;
}
[self initWithBitmapDataPlanes: NULL
pixelsWide: info->width
pixelsHigh: info->height
bitsPerSample: info->bitsPerSample
samplesPerPixel: info->samplesPerPixel
hasAlpha: (info->extraSamples > 0)
isPlanar: (info->planarConfig == PLANARCONFIG_SEPARATE)
colorSpaceName: space
bytesPerRow: 0
bitsPerPixel: 0];
_compression = [self _compressionTypeFromLocal: info->compression];
_comp_factor = 255 * (1 - ((float)info->quality)/100.0);
if (NSTiffRead(image, info, [self bitmapData]))
{
OBJC_FREE(info);
RELEASE(self);
NSLog(@"Tiff read invalid TIFF image data in directory %d", imageNumber);
return nil;
}
OBJC_FREE(info);
return self;
}
@end