pixiv_down/source/pd/image_reader/osx.d

/*
 * pixiv_down - CLI-based downloading tool for https://www.pixiv.net.
 * Copyright (C) 2024  Mio
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, version 3 of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
module pd.image_reader.osx;

version(OSX):

import std.string;

public class ImageReader
{
   this(string filename)
   {
      CFStringRef cfFilename = CFStringCreateWithCString(kCFAllocatorDefault, toStringz(filename), kCFStringEncodingUTF8);
      CFURLRef path = CFURLCreateWithFileSystemPath(kCFAllocatorDefault, cfFilename, kCFURLPOSIXPathStyle, false);
      scope(exit) {
         CFRelease(cfFilename);
         CFRelease(path);
      }

      systemRef = CGImageSourceCreateWithURL(path, null);
      if (null is systemRef) {
         // TODO: Check errno and see if we can use strerror.
         throw new Exception("Unable to create image source.");
      }
   }

   void dispose()
   {
      if (this.disposed) {
         return;
      }

      if (null !is systemRef) {
         CFRelease(systemRef);
      }

      this.disposed = true;
   }

   CGImageSourceRef getSystemRef() {
      return this.systemRef;
   }

private:
   CGImageSourceRef systemRef;
   bool disposed = false;
}

private:
nothrow:
extern(C):
@nogc:

alias CFTypeRef = void*;

alias CFAllocatorRef = CFTypeRef;
alias CFDictionaryRef = CFTypeRef;
alias CFStringRef = CFTypeRef;
alias CFURLRef = CFTypeRef;

alias CFStringEncoding = int;
alias CFURLPathStyle = int;

alias CGImageSourceRef = CFTypeRef;

enum kCFAllocatorDefault = null;

enum : CFStringEncoding
{
   kCFStringEncodingUTF8 = 0x08000100,
}

enum : CFURLPathStyle
{
   kCFURLPOSIXPathStyle = 0,
}

extern __gshared CFStringRef kCGImagePropertyGIFDictionary;
extern __gshared CFStringRef kCGImagePropertyGIFLoopCount;

void CFRelease(void*);

CFStringRef CFStringCreateWithCString(CFAllocatorRef allocator, const char *cStr, CFStringEncoding encoding);

CFURLRef CFURLCreateWithFileSystemPath(CFAllocatorRef allocator, CFStringRef filePath, CFURLPathStyle pathStyle, bool isDirectory);

CGImageSourceRef CGImageSourceCreateWithURL(CFURLRef url, CFDictionaryRef options);