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[imagemagick] / coders / ycbcr.c
diff --git a/coders/ycbcr.c b/coders/ycbcr.c
index 2546eab73e23dd9f63bff3db97bf2b538a705390..ede8af19498c716348bae7456e034bbfbeaa2e03 100644 (file)
--- a/coders/ycbcr.c
+++ b/coders/ycbcr.c
@@ -17,7 +17,7 @@
 %                                 July 1992                                   %
 %                                                                             %
 %                                                                             %
-%  Copyright 1999-2009 ImageMagick Studio LLC, a non-profit organization      %
+%  Copyright 1999-2010 ImageMagick Studio LLC, a non-profit organization      %
 %  dedicated to making software imaging solutions freely available.           %
 %                                                                             %
 %  You may not use this file except in compliance with the License.  You may  %
@@ -102,7 +102,7 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
     *canvas_image,
     *image;
 
-  long
+  ssize_t
     y;
 
   MagickBooleanType
@@ -120,7 +120,7 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
   register const PixelPacket
     *p;
 
-  register long
+  register ssize_t
     i,
     x;
 
@@ -158,13 +158,9 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
           image=DestroyImageList(image);
           return((Image *) NULL);
         }
-      for (i=0; i < image->offset; i++)
-        if (ReadBlobByte(image) == EOF)
-          {
-            ThrowFileException(exception,CorruptImageError,
-              "UnexpectedEndOfFile",image->filename);
-            break;
-          }
+      if (DiscardBlobBytes(image,image->offset) == MagickFalse)
+        ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
+          image->filename);
     }
   /*
     Create virtual canvas to support cropping (i.e. image.rgb[100x100+10+20]).
@@ -190,7 +186,7 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
       */
       image->scene++;
       length=GetQuantumExtent(canvas_image,quantum_info,quantum_type);
-      for (y=0; y < (long) image->rows; y++)
+      for (y=0; y < (ssize_t) image->rows; y++)
       {
         count=ReadBlob(image,length,pixels);
         if (count != (ssize_t) length)
@@ -222,7 +218,7 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
             length=GetQuantumExtent(canvas_image,quantum_info,quantum_type);
             count=ReadBlob(image,length,pixels);
           }
-        for (y=0; y < (long) image->extract_info.height; y++)
+        for (y=0; y < (ssize_t) image->extract_info.height; y++)
         {
           if (count != (ssize_t) length)
             {
@@ -239,7 +235,7 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
           if (SyncAuthenticPixels(canvas_image,exception) == MagickFalse)
             break;
           if (((y-image->extract_info.y) >= 0) && 
-              ((y-image->extract_info.y) < (long) image->rows))
+              ((y-image->extract_info.y) < (ssize_t) image->rows))
             {
               p=GetVirtualPixels(canvas_image,canvas_image->extract_info.x,0,
                 canvas_image->columns,1,exception);
@@ -248,13 +244,13 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
               if ((p == (const PixelPacket *) NULL) ||
                   (q == (PixelPacket *) NULL))
                 break;
-              for (x=0; x < (long) image->columns; x++)
+              for (x=0; x < (ssize_t) image->columns; x++)
               {
-                q->red=p->red;
-                q->green=p->green;
-                q->blue=p->blue;
+                SetRedPixelComponent(q,GetRedPixelComponent(p));
+                SetGreenPixelComponent(q,GetGreenPixelComponent(p));
+                SetBluePixelComponent(q,GetBluePixelComponent(p));
                 if (image->matte != MagickFalse)
-                  q->opacity=p->opacity;
+                  SetOpacityPixelComponent(q,GetOpacityPixelComponent(p));
                 p++;
                 q++;
               }
@@ -263,7 +259,8 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
             }
           if (image->previous == (Image *) NULL)
             {
-              status=SetImageProgress(image,LoadImageTag,y,image->rows);
+              status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
+                image->rows);
               if (status == MagickFalse)
                 break;
             }
@@ -290,7 +287,7 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
             length=GetQuantumExtent(canvas_image,quantum_info,RedQuantum);
             count=ReadBlob(image,length,pixels);
           }
-        for (y=0; y < (long) image->extract_info.height; y++)
+        for (y=0; y < (ssize_t) image->extract_info.height; y++)
         {
           for (i=0; i < (image->matte != MagickFalse ? 4 : 3); i++)
           {
@@ -310,7 +307,7 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
             if (SyncAuthenticPixels(canvas_image,exception) == MagickFalse)
               break;
             if (((y-image->extract_info.y) >= 0) && 
-                ((y-image->extract_info.y) < (long) image->rows))
+                ((y-image->extract_info.y) < (ssize_t) image->rows))
               {
                 p=GetVirtualPixels(canvas_image,canvas_image->extract_info.x,
                   0,canvas_image->columns,1,exception);
@@ -319,14 +316,14 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
                 if ((p == (const PixelPacket *) NULL) ||
                     (q == (PixelPacket *) NULL))
                   break;
-                for (x=0; x < (long) image->columns; x++)
+                for (x=0; x < (ssize_t) image->columns; x++)
                 {
                   switch (quantum_type)
                   {
-                    case RedQuantum: q->red=p->red; break;
-                    case GreenQuantum: q->green=p->green; break;
-                    case BlueQuantum: q->blue=p->blue; break;
-                    case OpacityQuantum: q->opacity=p->opacity; break;
+                    case RedQuantum: SetRedPixelComponent(q,GetRedPixelComponent(p)); break;
+                    case GreenQuantum: SetGreenPixelComponent(q,GetGreenPixelComponent(p)); break;
+                    case BlueQuantum: SetBluePixelComponent(q,GetBluePixelComponent(p)); break;
+                    case OpacityQuantum: SetOpacityPixelComponent(q,GetOpacityPixelComponent(p)); break;
                     default: break;
                   }
                   p++;
@@ -339,7 +336,8 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
           }
           if (image->previous == (Image *) NULL)
             {
-              status=SetImageProgress(image,LoadImageTag,y,image->rows);
+              status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
+                image->rows);
               if (status == MagickFalse)
                 break;
             }
@@ -356,7 +354,7 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
             length=GetQuantumExtent(canvas_image,quantum_info,RedQuantum);
             count=ReadBlob(image,length,pixels);
           }
-        for (y=0; y < (long) image->extract_info.height; y++)
+        for (y=0; y < (ssize_t) image->extract_info.height; y++)
         {
           if (count != (ssize_t) length)
             {
@@ -373,7 +371,7 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
           if (SyncAuthenticPixels(canvas_image,exception) == MagickFalse)
             break;
           if (((y-image->extract_info.y) >= 0) && 
-              ((y-image->extract_info.y) < (long) image->rows))
+              ((y-image->extract_info.y) < (ssize_t) image->rows))
             {
               p=GetVirtualPixels(canvas_image,canvas_image->extract_info.x,0,
                 canvas_image->columns,1,exception);
@@ -382,9 +380,9 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
               if ((p == (const PixelPacket *) NULL) ||
                   (q == (PixelPacket *) NULL))
                 break;
-              for (x=0; x < (long) image->columns; x++)
+              for (x=0; x < (ssize_t) image->columns; x++)
               {
-                q->red=p->red;
+                SetRedPixelComponent(q,GetRedPixelComponent(p));
                 p++;
                 q++;
               }
@@ -399,7 +397,7 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
             if (status == MagickFalse)
               break;
           }
-        for (y=0; y < (long) image->extract_info.height; y++)
+        for (y=0; y < (ssize_t) image->extract_info.height; y++)
         {
           if (count != (ssize_t) length)
             {
@@ -416,7 +414,7 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
           if (SyncAuthenticPixels(canvas_image,exception) == MagickFalse)
             break;
           if (((y-image->extract_info.y) >= 0) && 
-              ((y-image->extract_info.y) < (long) image->rows))
+              ((y-image->extract_info.y) < (ssize_t) image->rows))
             {
               p=GetVirtualPixels(canvas_image,canvas_image->extract_info.x,0,
                 canvas_image->columns,1,exception);
@@ -425,9 +423,9 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
               if ((p == (const PixelPacket *) NULL) ||
                   (q == (PixelPacket *) NULL))
                 break;
-              for (x=0; x < (long) image->columns; x++)
+              for (x=0; x < (ssize_t) image->columns; x++)
               {
-                q->green=p->green;
+                SetGreenPixelComponent(q,GetGreenPixelComponent(p));
                 p++;
                 q++;
               }
@@ -442,7 +440,7 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
             if (status == MagickFalse)
               break;
           }
-        for (y=0; y < (long) image->extract_info.height; y++)
+        for (y=0; y < (ssize_t) image->extract_info.height; y++)
         {
           if (count != (ssize_t) length)
             {
@@ -459,7 +457,7 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
           if (SyncAuthenticPixels(canvas_image,exception) == MagickFalse)
             break;
           if (((y-image->extract_info.y) >= 0) && 
-              ((y-image->extract_info.y) < (long) image->rows))
+              ((y-image->extract_info.y) < (ssize_t) image->rows))
             {
               p=GetVirtualPixels(canvas_image,canvas_image->extract_info.x,0,
                 canvas_image->columns,1,exception);
@@ -468,9 +466,9 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
               if ((p == (const PixelPacket *) NULL) ||
                   (q == (PixelPacket *) NULL))
                 break;
-              for (x=0; x < (long) image->columns; x++)
+              for (x=0; x < (ssize_t) image->columns; x++)
               {
-                q->blue=p->blue;
+                SetBluePixelComponent(q,GetBluePixelComponent(p));
                 p++;
                 q++;
               }
@@ -487,7 +485,7 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
           }
         if (image->matte != MagickFalse)
           {
-            for (y=0; y < (long) image->extract_info.height; y++)
+            for (y=0; y < (ssize_t) image->extract_info.height; y++)
             {
               if (count != (ssize_t) length)
                 {
@@ -504,7 +502,7 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
               if (SyncAuthenticPixels(canvas_image,exception) == MagickFalse)
                 break;
               if (((y-image->extract_info.y) >= 0) && 
-                  ((y-image->extract_info.y) < (long) image->rows))
+                  ((y-image->extract_info.y) < (ssize_t) image->rows))
                 {
                   p=GetVirtualPixels(canvas_image,
                     canvas_image->extract_info.x,0,canvas_image->columns,1,
@@ -514,9 +512,9 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
                   if ((p == (const PixelPacket *) NULL) ||
                       (q == (PixelPacket *) NULL))
                     break;
-                  for (x=0; x < (long) image->columns; x++)
+                  for (x=0; x < (ssize_t) image->columns; x++)
                   {
-                    q->opacity=p->opacity;
+                    SetOpacityPixelComponent(q,GetOpacityPixelComponent(p));
                     p++;
                     q++;
                   }
@@ -553,16 +551,12 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
             image=DestroyImageList(image);
             return((Image *) NULL);
           }
-        for (i=0; i < image->offset; i++)
-          if (ReadBlobByte(image) == EOF)
-            {
-              ThrowFileException(exception,CorruptImageError,
-                "UnexpectedEndOfFile",image->filename);
-              break;
-            }
+        if (DiscardBlobBytes(image,image->offset) == MagickFalse)
+          ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
+            image->filename);
         length=GetQuantumExtent(canvas_image,quantum_info,RedQuantum);
-        for (i=0; i < (long) scene; i++)
-          for (y=0; y < (long) image->extract_info.height; y++)
+        for (i=0; i < (ssize_t) scene; i++)
+          for (y=0; y < (ssize_t) image->extract_info.height; y++)
             if (ReadBlob(image,length,pixels) != (ssize_t) length)
               {
                 ThrowFileException(exception,CorruptImageError,
@@ -570,7 +564,7 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
                 break;
               }
         count=ReadBlob(image,length,pixels);
-        for (y=0; y < (long) image->extract_info.height; y++)
+        for (y=0; y < (ssize_t) image->extract_info.height; y++)
         {
           if (count != (ssize_t) length)
             {
@@ -587,7 +581,7 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
           if (SyncAuthenticPixels(canvas_image,exception) == MagickFalse)
             break;
           if (((y-image->extract_info.y) >= 0) && 
-              ((y-image->extract_info.y) < (long) image->rows))
+              ((y-image->extract_info.y) < (ssize_t) image->rows))
             {
               p=GetVirtualPixels(canvas_image,canvas_image->extract_info.x,0,
                 canvas_image->columns,1,exception);
@@ -596,9 +590,9 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
               if ((p == (const PixelPacket *) NULL) ||
                   (q == (PixelPacket *) NULL))
                 break;
-              for (x=0; x < (long) image->columns; x++)
+              for (x=0; x < (ssize_t) image->columns; x++)
               {
-                q->red=p->red;
+                SetRedPixelComponent(q,GetRedPixelComponent(p));
                 p++;
                 q++;
               }
@@ -623,8 +617,8 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
             return((Image *) NULL);
           }
         length=GetQuantumExtent(canvas_image,quantum_info,GreenQuantum);
-        for (i=0; i < (long) scene; i++)
-          for (y=0; y < (long) image->extract_info.height; y++)
+        for (i=0; i < (ssize_t) scene; i++)
+          for (y=0; y < (ssize_t) image->extract_info.height; y++)
             if (ReadBlob(image,length,pixels) != (ssize_t) length)
               {
                 ThrowFileException(exception,CorruptImageError,
@@ -632,7 +626,7 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
                 break;
               }
         count=ReadBlob(image,length,pixels);
-        for (y=0; y < (long) image->extract_info.height; y++)
+        for (y=0; y < (ssize_t) image->extract_info.height; y++)
         {
           if (count != (ssize_t) length)
             {
@@ -649,7 +643,7 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
           if (SyncAuthenticPixels(canvas_image,exception) == MagickFalse)
             break;
           if (((y-image->extract_info.y) >= 0) && 
-              ((y-image->extract_info.y) < (long) image->rows))
+              ((y-image->extract_info.y) < (ssize_t) image->rows))
             {
               p=GetVirtualPixels(canvas_image,canvas_image->extract_info.x,0,
                 canvas_image->columns,1,exception);
@@ -658,9 +652,9 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
               if ((p == (const PixelPacket *) NULL) ||
                   (q == (PixelPacket *) NULL))
                 break;
-              for (x=0; x < (long) image->columns; x++)
+              for (x=0; x < (ssize_t) image->columns; x++)
               {
-                q->green=p->green;
+                SetGreenPixelComponent(q,GetGreenPixelComponent(p));
                 p++;
                 q++;
               }
@@ -685,8 +679,8 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
             return((Image *) NULL);
           }
         length=GetQuantumExtent(canvas_image,quantum_info,BlueQuantum);
-        for (i=0; i < (long) scene; i++)
-          for (y=0; y < (long) image->extract_info.height; y++)
+        for (i=0; i < (ssize_t) scene; i++)
+          for (y=0; y < (ssize_t) image->extract_info.height; y++)
             if (ReadBlob(image,length,pixels) != (ssize_t) length)
               {
                 ThrowFileException(exception,CorruptImageError,
@@ -694,7 +688,7 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
                 break;
               }
         count=ReadBlob(image,length,pixels);
-        for (y=0; y < (long) image->extract_info.height; y++)
+        for (y=0; y < (ssize_t) image->extract_info.height; y++)
         {
           if (count != (ssize_t) length)
             {
@@ -711,7 +705,7 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
           if (SyncAuthenticPixels(canvas_image,exception) == MagickFalse)
             break;
           if (((y-image->extract_info.y) >= 0) && 
-              ((y-image->extract_info.y) < (long) image->rows))
+              ((y-image->extract_info.y) < (ssize_t) image->rows))
             {
               p=GetVirtualPixels(canvas_image,canvas_image->extract_info.x,0,
                 canvas_image->columns,1,exception);
@@ -720,9 +714,9 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
               if ((p == (const PixelPacket *) NULL) ||
                   (q == (PixelPacket *) NULL))
                 break;
-              for (x=0; x < (long) image->columns; x++)
+              for (x=0; x < (ssize_t) image->columns; x++)
               {
-                q->blue=p->blue;
+                SetBluePixelComponent(q,GetBluePixelComponent(p));
                 p++;
                 q++;
               }
@@ -749,8 +743,8 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
                 return((Image *) NULL);
               }
             length=GetQuantumExtent(canvas_image,quantum_info,AlphaQuantum);
-            for (i=0; i < (long) scene; i++)
-              for (y=0; y < (long) image->extract_info.height; y++)
+            for (i=0; i < (ssize_t) scene; i++)
+              for (y=0; y < (ssize_t) image->extract_info.height; y++)
                 if (ReadBlob(image,length,pixels) != (ssize_t) length)
                   {
                     ThrowFileException(exception,CorruptImageError,
@@ -758,7 +752,7 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
                     break;
                   }
             count=ReadBlob(image,length,pixels);
-            for (y=0; y < (long) image->extract_info.height; y++)
+            for (y=0; y < (ssize_t) image->extract_info.height; y++)
             {
               if (count != (ssize_t) length)
                 {
@@ -775,7 +769,7 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
               if (SyncAuthenticPixels(canvas_image,exception) == MagickFalse)
                 break;
               if (((y-image->extract_info.y) >= 0) && 
-                  ((y-image->extract_info.y) < (long) image->rows))
+                  ((y-image->extract_info.y) < (ssize_t) image->rows))
                 {
                   p=GetVirtualPixels(canvas_image,
                     canvas_image->extract_info.x,0,canvas_image->columns,1,
@@ -785,9 +779,9 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
                   if ((p == (const PixelPacket *) NULL) ||
                       (q == (PixelPacket *) NULL))
                     break;
-                  for (x=0; x < (long) image->columns; x++)
+                  for (x=0; x < (ssize_t) image->columns; x++)
                   {
-                    q->opacity=p->opacity;
+                    SetOpacityPixelComponent(q,GetOpacityPixelComponent(p));
                     p++;
                     q++;
                   }
@@ -838,8 +832,8 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
       }
     scene++;
   } while (count == (ssize_t) length);
-  InheritException(exception,&image->exception);
   quantum_info=DestroyQuantumInfo(quantum_info);
+  InheritException(&image->exception,&canvas_image->exception);
   canvas_image=DestroyImage(canvas_image);
   (void) CloseBlob(image);
   return(GetFirstImageInList(image));
@@ -865,10 +859,10 @@ static Image *ReadYCBCRImage(const ImageInfo *image_info,
 %
 %  The format of the RegisterYCBCRImage method is:
 %
-%      unsigned long RegisterYCBCRImage(void)
+%      size_t RegisterYCBCRImage(void)
 %
 */
-ModuleExport unsigned long RegisterYCBCRImage(void)
+ModuleExport size_t RegisterYCBCRImage(void)
 {
   MagickInfo
     *entry;
@@ -946,7 +940,7 @@ ModuleExport void UnregisterYCBCRImage(void)
 static MagickBooleanType WriteYCBCRImage(const ImageInfo *image_info,
   Image *image)
 {
-  long
+  ssize_t
     y;
 
   MagickBooleanType
@@ -1020,7 +1014,7 @@ static MagickBooleanType WriteYCBCRImage(const ImageInfo *image_info,
         /*
           No interlacing:  YCbCrYCbCrYCbCrYCbCrYCbCrYCbCr...
         */
-        for (y=0; y < (long) image->rows; y++)
+        for (y=0; y < (ssize_t) image->rows; y++)
         {
           p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
           if (p == (const PixelPacket *) NULL)
@@ -1032,7 +1026,8 @@ static MagickBooleanType WriteYCBCRImage(const ImageInfo *image_info,
             break;
           if (image->previous == (Image *) NULL)
             {
-              status=SetImageProgress(image,SaveImageTag,y,image->rows);
+              status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
+                image->rows);
               if (status == MagickFalse)
                 break;
             }
@@ -1044,7 +1039,7 @@ static MagickBooleanType WriteYCBCRImage(const ImageInfo *image_info,
         /*
           Line interlacing:  YYY...CbCbCb...CrCrCr...YYY...CbCbCb...CrCrCr...
         */
-        for (y=0; y < (long) image->rows; y++)
+        for (y=0; y < (ssize_t) image->rows; y++)
         {
           p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
           if (p == (const PixelPacket *) NULL)
@@ -1074,7 +1069,8 @@ static MagickBooleanType WriteYCBCRImage(const ImageInfo *image_info,
             }
           if (image->previous == (Image *) NULL)
             {
-              status=SetImageProgress(image,SaveImageTag,y,image->rows);
+              status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
+                image->rows);
               if (status == MagickFalse)
                 break;
             }
@@ -1086,7 +1082,7 @@ static MagickBooleanType WriteYCBCRImage(const ImageInfo *image_info,
         /*
           Plane interlacing:  YYYYYY...CbCbCbCbCbCb...CrCrCrCrCrCr...
         */
-        for (y=0; y < (long) image->rows; y++)
+        for (y=0; y < (ssize_t) image->rows; y++)
         {
           p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
           if (p == (const PixelPacket *) NULL)
@@ -1103,7 +1099,7 @@ static MagickBooleanType WriteYCBCRImage(const ImageInfo *image_info,
             if (status == MagickFalse)
               break;
           }
-        for (y=0; y < (long) image->rows; y++)
+        for (y=0; y < (ssize_t) image->rows; y++)
         {
           p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
           if (p == (const PixelPacket *) NULL)
@@ -1120,7 +1116,7 @@ static MagickBooleanType WriteYCBCRImage(const ImageInfo *image_info,
             if (status == MagickFalse)
               break;
           }
-        for (y=0; y < (long) image->rows; y++)
+        for (y=0; y < (ssize_t) image->rows; y++)
         {
           p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
           if (p == (const PixelPacket *) NULL)
@@ -1139,7 +1135,7 @@ static MagickBooleanType WriteYCBCRImage(const ImageInfo *image_info,
           }
         if (quantum_type == RGBAQuantum)
           {
-            for (y=0; y < (long) image->rows; y++)
+            for (y=0; y < (ssize_t) image->rows; y++)
             {
               p=GetVirtualPixels(image,0,y,image->columns,1,
                 &image->exception);
@@ -1173,7 +1169,7 @@ static MagickBooleanType WriteYCBCRImage(const ImageInfo *image_info,
           AppendBinaryBlobMode,&image->exception);
         if (status == MagickFalse)
           return(status);
-        for (y=0; y < (long) image->rows; y++)
+        for (y=0; y < (ssize_t) image->rows; y++)
         {
           p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
           if (p == (const PixelPacket *) NULL)
@@ -1196,7 +1192,7 @@ static MagickBooleanType WriteYCBCRImage(const ImageInfo *image_info,
           AppendBinaryBlobMode,&image->exception);
         if (status == MagickFalse)
           return(status);
-        for (y=0; y < (long) image->rows; y++)
+        for (y=0; y < (ssize_t) image->rows; y++)
         {
           p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
           if (p == (const PixelPacket *) NULL)
@@ -1219,7 +1215,7 @@ static MagickBooleanType WriteYCBCRImage(const ImageInfo *image_info,
           AppendBinaryBlobMode,&image->exception);
         if (status == MagickFalse)
           return(status);
-        for (y=0; y < (long) image->rows; y++)
+        for (y=0; y < (ssize_t) image->rows; y++)
         {
           p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
           if (p == (const PixelPacket *) NULL)
@@ -1244,7 +1240,7 @@ static MagickBooleanType WriteYCBCRImage(const ImageInfo *image_info,
               AppendBinaryBlobMode,&image->exception);
             if (status == MagickFalse)
               return(status);
-            for (y=0; y < (long) image->rows; y++)
+            for (y=0; y < (ssize_t) image->rows; y++)
             {
               p=GetVirtualPixels(image,0,y,image->columns,1,
                 &image->exception);
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