RCGImageDevice.m

   1 #import "RCGImageDevice.h"
   2
   3 @implementation RCGImageDevice
   4 + (void)load {
   5         [RDevice registerDevice:self forDisplay:@"jpeg"];
   6         [RDevice registerDevice:self forDisplay:@"png"];
   7         [RDevice registerDevice:self forDisplay:@"tiff"];
   8         [RDevice registerDevice:self forDisplay:@""];
   9 }
  10
  11 - (void)didResize {
  12         //Dispose of old context if needed
  13         if(context != NULL && bitmap != NULL) {
  14                 CGContextRelease(context);
  15                 free(bitmap);
  16                 bitmapSize = 0;
  17         }
  18
  19         NSSize size = [self size];
  20         size_t width    = 1*size.width;
  21         size_t height   = 1*size.height;
  22         size_t rowBytes = (width*8*4+7)/8;
  23
  24         bitmapSize = rowBytes*height;
  25         bitmap = malloc(bitmapSize);
  26         memset(bitmap,0,bitmapSize);
  27         context = CGBitmapContextCreate(bitmap,width,height,8,rowBytes,CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB),kCGImageAlphaPremultipliedLast);
  28         CGContextTranslateCTM(context,0,1*size.height);
  29         CGContextScaleCTM(context,1.0,-1.0);
  30         CGContextSetShouldAntialias(context,RDevice_GetAntialias(desc) ? true : false);
  31         RDevice_ResetGDepth(desc);
  32 }
  33
  34 - (void)finishOpening {
  35         RDevice_SetScale(desc,1.0);
  36         [self didResize];
  37 }
  38
  39 - (void)drawInRect:(NSRect)rect {
  40         if(NULL != context) {
  41                 CGImageRef image = CGBitmapContextCreateImage(context);
  42                 CGContextDrawImage([[NSGraphicsContext currentContext] graphicsPort],CGRectMake(rect.origin.x,rect.origin.y,rect.size.width,rect.size.height),image);
  43                 CGImageRelease(image);
  44         }
  45 }
  46
  47 - (CGContextRef)context {
  48         return context;
  49 }
  50
  51 - (BOOL)canDrawInView { return YES; }
  52 - (BOOL)canResize { return YES; }
  53
  54 - (void)close {
  55         if(nil != [self display] && nil != [self target]) {
  56                 NSData *data = [self deviceRepresentationOfType:[self display]];
  57                 if(nil != data) {
  58                         [data retain];
  59                         [data writeToURL:[NSURL URLWithString:[self target]] atomically:YES];
  60                         [data release];
  61                 }
  62         }
  63         [super close];
  64 }
  65
  66 - (NSData*)deviceRepresentationOfType:(NSString*)aType {
  67         if((nil == aType || [aType isEqual:@""])) {
  68                 NSString *aDisplay = [self display];
  69                 //If we don't have a display just return the raw bitmap
  70                 if(nil == aDisplay || [aDisplay isEqual:@""])
  71                         return [[[NSData alloc] initWithBytes:bitmap length:bitmapSize] autorelease];
  72                 else aType = aDisplay;
  73         }
  74         if([aType isEqual:@"tiff"] || [aType isEqual:NSTIFFPboardType]) {
  75         }
  76         return nil;
  77 }
  78
  79 //For easier access
  80 - (NSData*)deviceRepresentation { return [self deviceRepresentationOfType:nil]; }
  81
  82
  83 @end