以编程方式创建ICNS: [英] Creating an ICNS programmatically: "Unsupported Image Size"

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问题描述

我正在尝试以编程方式创建ICNS(包括1024x1024图像).当前，我正在创建一个NSImage，然后创建具有适当分辨率的CGImageRef对象，最后我使用CGImageDestinationAddImage()将它们添加到图标中. Peter Hosey已经帮助我创建了"@ 2x"图像，但是这些图像的大小无法设置.

I'm trying to create an ICNS (including a 1024x1024 image) programmatically. Currently I'm creating an NSImage, then I create CGImageRef objects with the appropriate resolution, finally I'm adding them to an icon by using CGImageDestinationAddImage(). Peter Hosey has helped me create '@2x' images already, but the sizes of the images don't wanna be set.

这是代码(仍然有些混乱，sourcefile代表图像的路径):

This is the code (still a bit messy, sourcefile represents the path to the image):

NSSize sizes[10];
sizes[0] = NSMakeSize(1024,1024);
sizes[1] = NSMakeSize(512,512);
sizes[2] = NSMakeSize(512,512);
sizes[3] = NSMakeSize(256,256);
sizes[4] = NSMakeSize(256,256);
sizes[5] = NSMakeSize(128,128);
sizes[6] = NSMakeSize(64,64);
sizes[7] = NSMakeSize(32,32);
sizes[8] = NSMakeSize(32,32);
sizes[9] = NSMakeSize(16,16);
int count = 0;
for (int i=0 ; i<10 ; i++) {
    if ([[NSUserDefaults standardUserDefaults] boolForKey:[NSString stringWithFormat:@"Size%i",i+1]]) count++;
}
NSURL *fileURL = [NSURL fileURLWithPath:aPath];

// Create icns
CGImageDestinationRef dr = CGImageDestinationCreateWithURL((CFURLRef)fileURL, kUTTypeAppleICNS , count, NULL);
NSImage *img = [[NSImage alloc] initWithContentsOfFile:sourcefile];
for (int i=0 ; i<10 ; i++) {
    if ([[NSUserDefaults standardUserDefaults] boolForKey:[NSString stringWithFormat:@"Size%i",i+1]]) {

        // Create dictionary
        BOOL is2X = true;
        if (i == 1 || i == 3 || i == 5 || i == 7 || i == 9) is2X = false;
        int dpi = 144, size = (int)(sizes[i].width/2);
        if (!is2X) {dpi = 72;size = sizes[i].width;}
        [img setSize:NSMakeSize(size,size)];
        for (NSImageRep *rep in [img representations])[rep setSize:NSMakeSize(size,size)];
        const void *keys[2] = {kCGImagePropertyDPIWidth, kCGImagePropertyDPIHeight};
        const void *values[2] = {CFNumberCreate(0, kCFNumberSInt32Type, &dpi), CFNumberCreate(0, kCFNumberSInt32Type, &dpi)};
        CFDictionaryRef imgprops = CFDictionaryCreate(NULL, keys, values, 2, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);

        // Add image
        NSRect prect = NSMakeRect(0,0,size,size);
        CGImageRef i1 = [img CGImageForProposedRect:&prect context:nil hints:nil];
        CGImageDestinationAddImage(dr, i1, imgprops);
    }
}
CGImageDestinationFinalize(dr);
CFRelease(dr);

size是当前图像应为的宽度或高度.如果我们要制作"@ 2x"图像，则dpi为144，否则为72.这些值已通过NSLog进行了检查.

size is the width or height that the current image should be. dpi is 144 if we're making an '@2x' image, otherwise it's 72. These values have been checked with NSLog.

生成的ICNS文件中的图像大小均与输入图像相同.如果输入图像的大小为1024x1024，则ImageIO会抱怨:

The images in the resulting ICNS file are all the same size as the input image. If the size of the input image is 1024x1024, ImageIO complains:

ImageIO:_CGImagePluginWriteICNS不支持的图像尺寸(1024 x 1024)-缩放比例:1

ImageIO: _CGImagePluginWriteICNS unsupported image size (1024 x 1024) - scaling factor: 1

每次dpi为72，大小为1024x1024时，都会显示上述错误.

The above error is displayed every time the dpi is 72 and the size is 1024x1024.

我需要知道如何设置要添加到ICNS文件中的CGImage的大小.

我记录了图像:

2012-12-31 12:48:51.281 Eicon [912:680f] | NSImage 0x101b4caf0 大小= {512，512}重复次数=(

2012-12-31 12:48:51.281 Eicon[912:680f] |NSImage 0x101b4caf0 Size={512, 512} Reps=(

"NSBitmapImageRep 0x10380b900 Size={512, 512} ColorSpace=(not yet loaded) BPS=8 BPP=(not yet loaded) Pixels=1024x1024 Alpha=YES

Planar = NO Format =(尚未加载)CurrentBacking = nil(故障) CGImageSource = 0x10380ae70"

Planar=NO Format=(not yet loaded) CurrentBacking=nil (faulting) CGImageSource=0x10380ae70"

2012-12-31 12:48:52.058 Eicon [912:680f] | NSImage 0x101b4caf0 大小= {512，512}代表=(

2012-12-31 12:48:52.058 Eicon[912:680f] |NSImage 0x101b4caf0 Size={512, 512} Reps=(

"NSBitmapImageRep 0x10380b900 Size={512, 512} ColorSpace=Generic RGB colorspace BPS=8 BPP=32 Pixels=1024x1024 Alpha=YES Planar=NO

Format = 2 CurrentBacking = | CGImageRef:0x101c14630 | CGImageSource = 0x10380ae70"