185 lines
4.2 KiB
Plaintext
185 lines
4.2 KiB
Plaintext
//
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// CharacterGenerator.mm
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// 2Term
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//
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// Created by Kelvin Sherlock on 7/4/2010.
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// Copyright 2010 __MyCompanyName__. All rights reserved.
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//
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#import "CharacterGenerator.h"
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@interface CharacterGenerator ()
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-(void)loadImageNamed: (NSString *)imageName;
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-(id)initWithImageNamed: (NSString *)imageName;
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@end
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@implementation CharacterGenerator
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@synthesize characterSize = _size;
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#if 0
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static CGImageRef PNGImage(NSString *path)
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{
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CGImageRef image = NULL;
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CGDataProviderRef provider = NULL;
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if (!path) return NULL;
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provider = CGDataProviderCreateWithFilename([path fileSystemRepresentation]);
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if (provider)
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{
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image = CGImageCreateWithPNGDataProvider( provider, NULL, NO, kCGRenderingIntentDefault);
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CGDataProviderRelease(provider);
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}
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return image;
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}
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#endif
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+(CharacterGenerator *)generatorForCharacterSet: (unsigned)characterSet {
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static CharacterGenerator *singletons[4] = {};
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static NSString *names[] = {
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@"a2-charset-80",
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@"a2-charset-40",
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@"vt52-charset",
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@"vt100-charset",
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};
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constexpr unsigned MaxCharSet = sizeof(names) / sizeof(names[0]);
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static dispatch_once_t onceToken;
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dispatch_once(&onceToken, ^{
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for (unsigned i = 0; i < MaxCharSet; ++i)
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singletons[i] = [[CharacterGenerator alloc] initWithImageNamed: names[i]];
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});
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if (characterSet >= MaxCharSet) return nil;
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return singletons[characterSet];
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}
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+(id)generator
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{
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return [self generatorForCharacterSet: CGApple80];
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}
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-(id)initWithImageNamed: (NSString *)imageName {
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if ((self = [super init]))
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{
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[self loadImageNamed: imageName];
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}
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return self;
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}
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/*
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* This loads the image then split it up into 256 images.
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*
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* All representations are handled so it retins any @2x artwork.
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*
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*/
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-(void)loadImageNamed:(NSString *)imageName {
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_image = [[NSImage imageNamed: imageName] retain];
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_size = [_image size];
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_size.width /= 16;
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_size.height /= 16;
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for (unsigned i = 0; i < sizeof(_characters) / sizeof(_characters[0]); ++i)
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_characters[i] = [[NSImage alloc] initWithSize: _size];
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for (NSImageRep *rep in [_image representations]) {
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CGImageRef mask;
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CGImageRef src;
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NSSize size;
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/* src will auto release */
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src = [rep CGImageForProposedRect: NULL context: nil hints: nil];
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size.width = CGImageGetWidth(src) / 16;
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size.height = CGImageGetHeight(src) / 16;
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mask = CGImageMaskCreate(CGImageGetWidth(src),
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CGImageGetHeight(src),
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CGImageGetBitsPerComponent(src),
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CGImageGetBitsPerPixel(src),
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CGImageGetBytesPerRow(src),
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CGImageGetDataProvider(src),
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NULL, NO);
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for (unsigned i = 0; i < 16; ++i)
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{
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for (unsigned j = 0; j < 16; ++j)
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{
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CGImageRef cgimg = CGImageCreateWithImageInRect(mask, CGRectMake(j * size.width, i * size.height, size.width, size.height));
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NSBitmapImageRep *rep = [[NSBitmapImageRep alloc] initWithCGImage: cgimg];
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NSImage *nsimg = _characters[i * 16 + j];
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[nsimg addRepresentation: rep];
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[rep release];
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CGImageRelease(cgimg);
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}
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}
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CGImageRelease(mask);
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}
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}
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-(void)dealloc
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{
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[_image release];
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for (auto &o : _characters) [o release];
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[super dealloc];
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}
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-(NSImage *)imageForCharacter: (unsigned)character
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{
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if (character >= sizeof(_characters) / sizeof(_characters[0])) return nil;
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return _characters[character];
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}
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-(void)drawCharacter: (unsigned)character atPoint: (NSPoint)point
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{
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if (character >= sizeof(_characters) / sizeof(_characters[0])) return;
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NSImage *img = _characters[character];
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if (!img) return;
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[img drawInRect: (NSRect){point, _size}
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fromRect: NSZeroRect
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operation: NSCompositeCopy
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fraction: 1.0
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respectFlipped: YES
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hints: nil];
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}
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@end
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