TwoTerm/CharacterGenerator.m

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//
// CharacterGenerator.mm
// 2Term
//
// Created by Kelvin Sherlock on 7/4/2010.
// Copyright 2010 __MyCompanyName__. All rights reserved.
//
#import "CharacterGenerator.h"
@implementation CharacterGenerator
static CGImageRef PNGImage(NSString *path)
{
CGImageRef image = NULL;
CGDataProviderRef provider = NULL;
if (!path) return NULL;
provider = CGDataProviderCreateWithFilename([path fileSystemRepresentation]);
if (provider)
{
image = CGImageCreateWithPNGDataProvider( provider, NULL, NO, kCGRenderingIntentDefault);
CGDataProviderRelease(provider);
}
return image;
}
+(id)generator
{
return [[self new] autorelease];
}
-(id)init
{
if ((self = [super init]))
{
NSBundle *mainBundle;
NSString *imagePath;
CGImageRef mask;
CGImageRef src;
mainBundle = [NSBundle mainBundle];
imagePath = [mainBundle pathForResource: @"a2-charset-80" ofType: @"png"];
_characters = [[NSMutableArray alloc] initWithCapacity: 256];
_size = NSMakeSize(7, 16);
src = PNGImage(imagePath);
if (src)
{
mask = CGImageMaskCreate(CGImageGetWidth(src),
CGImageGetHeight(src),
CGImageGetBitsPerComponent(src),
CGImageGetBitsPerPixel(src),
CGImageGetBytesPerRow(src),
CGImageGetDataProvider(src),
NULL, NO);
for (unsigned i = 0; i < 16; ++i)
{
for (unsigned j = 0; j < 16; ++j)
{
CGImageRef cgimg = CGImageCreateWithImageInRect(mask, CGRectMake(j * _size.width, i * _size.height, _size.width, _size.height));
NSImage *nsimg = [[NSImage alloc] initWithCGImage: cgimg size: _size];
[_characters addObject: nsimg];
CGImageRelease(cgimg);
[nsimg release];
}
}
CGImageRelease(src);
CGImageRelease(mask);
}
}
return self;
}
-(void)dealloc
{
if (_image) CGImageRelease(_image);
[_characters release];
[super dealloc];
}
-(NSImage *)imageForCharacter: (unsigned)character
{
if (character > [_characters count]) return nil;
return (NSImage *)[_characters objectAtIndex: character];
}
-(void)drawCharacter: (unsigned)character atPoint: (NSPoint)point
{
NSImage *img = [self imageForCharacter: character];
if (!img) return;
[img drawInRect: (NSRect){point, _size}
fromRect: NSZeroRect
operation: NSCompositeCopy
fraction: 1.0
respectFlipped: YES
hints: nil];
}
@end