From: cristy <urban-warrior@git.imagemagick.org>
Date: Mon, 8 Apr 2013 00:50:13 +0000 (+0000)
Subject: (no commit message)
X-Git-Tag: 7.0.1-0~3918
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=883fde11debec15cedb05dc5d7228d8588066bc0;p=imagemagick

---

diff --git a/MagickCore/attribute.c b/MagickCore/attribute.c
index 86ac12e30..ef8c3328f 100644
--- a/MagickCore/attribute.c
+++ b/MagickCore/attribute.c
@@ -413,7 +413,7 @@ MagickExport size_t GetImageDepth(const Image *image,ExceptionInfo *exception)
           register ssize_t
             i;
 
-          if (GetPixelMask(image,p) == 0)
+          if (GetPixelReadMask(image,p) == 0)
             {
               p+=GetPixelChannels(image);
               continue;
@@ -423,7 +423,8 @@ MagickExport size_t GetImageDepth(const Image *image,ExceptionInfo *exception)
             PixelChannel channel=GetPixelChannelChannel(image,i);
             PixelTrait traits=GetPixelChannelTraits(image,channel);
             if ((traits == UndefinedPixelTrait) ||
-                (channel == IndexPixelChannel) || (channel == MaskPixelChannel))
+                (channel == IndexPixelChannel) ||
+                (channel == ReadMaskPixelChannel) || (channel == MetaPixelChannel))
               continue;
             if (depth_map[ScaleQuantumToMap(p[i])] > current_depth[id])
               current_depth[id]=depth_map[ScaleQuantumToMap(p[i])];
@@ -471,7 +472,7 @@ MagickExport size_t GetImageDepth(const Image *image,ExceptionInfo *exception)
       register ssize_t
         i;
 
-      if (GetPixelMask(image,p) == 0)
+      if (GetPixelReadMask(image,p) == 0)
         {
           p+=GetPixelChannels(image);
           continue;
@@ -487,7 +488,7 @@ MagickExport size_t GetImageDepth(const Image *image,ExceptionInfo *exception)
         channel=GetPixelChannelChannel(image,i);
         traits=GetPixelChannelTraits(image,channel);
         if ((traits == UndefinedPixelTrait) || (channel == IndexPixelChannel) ||
-            (channel == MaskPixelChannel))
+            (channel == ReadMaskPixelChannel))
           continue;
         while (current_depth[id] < MAGICKCORE_QUANTUM_DEPTH)
         {
@@ -996,7 +997,7 @@ MagickExport MagickBooleanType SetImageDepth(Image *image,
           register ssize_t
             i;
 
-          if (GetPixelMask(image,q) == 0)
+          if (GetPixelReadMask(image,q) == 0)
             {
               q+=GetPixelChannels(image);
               continue;
@@ -1012,7 +1013,7 @@ MagickExport MagickBooleanType SetImageDepth(Image *image,
             channel=GetPixelChannelChannel(image,i);
             traits=GetPixelChannelTraits(image,channel);
             if ((traits == UndefinedPixelTrait) ||
-                (channel == IndexPixelChannel) || (channel == MaskPixelChannel))
+                (channel == IndexPixelChannel) || (channel == ReadMaskPixelChannel))
               continue;
             q[i]=depth_map[ScaleQuantumToMap(q[i])];
           }
@@ -1059,7 +1060,7 @@ MagickExport MagickBooleanType SetImageDepth(Image *image,
       register ssize_t
         i;
 
-      if (GetPixelMask(image,q) == 0)
+      if (GetPixelReadMask(image,q) == 0)
         {
           q+=GetPixelChannels(image);
           continue;
@@ -1075,7 +1076,7 @@ MagickExport MagickBooleanType SetImageDepth(Image *image,
         channel=GetPixelChannelChannel(image,i);
         traits=GetPixelChannelTraits(image,channel);
         if ((traits == UndefinedPixelTrait) || (channel == IndexPixelChannel) ||
-            (channel == MaskPixelChannel))
+            (channel == ReadMaskPixelChannel))
           continue;
         q[i]=ScaleAnyToQuantum(ScaleQuantumToAny(q[i],range),range);
       }
diff --git a/MagickCore/cache-private.h b/MagickCore/cache-private.h
index 51afa32f7..b106cc6c2 100644
--- a/MagickCore/cache-private.h
+++ b/MagickCore/cache-private.h
@@ -116,7 +116,8 @@ typedef struct _CacheInfo
     alpha_trait;
 
   MagickBooleanType
-    mask;
+    read_mask,
+    write_mask;
 
   size_t
     columns,
diff --git a/MagickCore/cache.c b/MagickCore/cache.c
index 1f2df2f08..be869ab95 100644
--- a/MagickCore/cache.c
+++ b/MagickCore/cache.c
@@ -1464,7 +1464,8 @@ static inline MagickBooleanType ValidatePixelCacheMorphology(
   if ((image->storage_class != cache_info->storage_class) ||
       (image->colorspace != cache_info->colorspace) ||
       (image->alpha_trait != cache_info->alpha_trait) ||
-      (image->mask != cache_info->mask) ||
+      (image->read_mask != cache_info->read_mask) ||
+      (image->write_mask != cache_info->write_mask) ||
       (image->columns != cache_info->columns) ||
       (image->rows != cache_info->rows) ||
       (image->number_channels != cache_info->number_channels) ||
@@ -3455,7 +3456,8 @@ static MagickBooleanType OpenPixelCache(Image *image,const MapMode mode,
   cache_info->storage_class=image->storage_class;
   cache_info->colorspace=image->colorspace;
   cache_info->alpha_trait=image->alpha_trait;
-  cache_info->mask=image->mask;
+  cache_info->read_mask=image->read_mask;
+  cache_info->write_mask=image->write_mask;
   cache_info->rows=image->rows;
   cache_info->columns=image->columns;
   InitializePixelChannelMap(image);
diff --git a/MagickCore/channel.c b/MagickCore/channel.c
index a6ef95d7d..0d829c3ea 100644
--- a/MagickCore/channel.c
+++ b/MagickCore/channel.c
@@ -677,7 +677,7 @@ MagickExport Image *SeparateImage(const Image *image,
       register ssize_t
         i;
 
-      if (GetPixelMask(image,p) == 0)
+      if (GetPixelReadMask(image,p) == 0)
         {
           p+=GetPixelChannels(image);
           q+=GetPixelChannels(separate_image);
diff --git a/MagickCore/compare.c b/MagickCore/compare.c
index 192397b4f..79520e73c 100644
--- a/MagickCore/compare.c
+++ b/MagickCore/compare.c
@@ -221,7 +221,7 @@ MagickExport Image *CompareImages(Image *image,const Image *reconstruct_image,
       register ssize_t
         i;
 
-      if (GetPixelMask(image,p) == 0)
+      if (GetPixelReadMask(image,p) == 0)
         {
           SetPixelInfoPixel(highlight_image,&lowlight,r);
           p+=GetPixelChannels(image);
@@ -385,7 +385,7 @@ static MagickBooleanType GetAbsoluteDistortion(const Image *image,
       register ssize_t
         i;
 
-      if (GetPixelMask(image,p) == 0)
+      if (GetPixelReadMask(image,p) == 0)
         {
           p+=GetPixelChannels(image);
           q+=GetPixelChannels(reconstruct_image);
@@ -508,7 +508,7 @@ static MagickBooleanType GetFuzzDistortion(const Image *image,
       register ssize_t
         i;
 
-      if (GetPixelMask(image,p) == 0)
+      if (GetPixelReadMask(image,p) == 0)
         {
           p+=GetPixelChannels(image);
           q+=GetPixelChannels(reconstruct_image);
@@ -608,7 +608,7 @@ static MagickBooleanType GetMeanAbsoluteDistortion(const Image *image,
       register ssize_t
         i;
 
-      if (GetPixelMask(image,p) == 0)
+      if (GetPixelReadMask(image,p) == 0)
         {
           p+=GetPixelChannels(image);
           q+=GetPixelChannels(reconstruct_image);
@@ -701,7 +701,7 @@ static MagickBooleanType GetMeanErrorPerPixel(Image *image,
       register ssize_t
         i;
 
-      if (GetPixelMask(image,p) == 0)
+      if (GetPixelReadMask(image,p) == 0)
         {
           p+=GetPixelChannels(image);
           q+=GetPixelChannels(reconstruct_image);
@@ -799,7 +799,7 @@ static MagickBooleanType GetMeanSquaredDistortion(const Image *image,
       register ssize_t
         i;
 
-      if (GetPixelMask(image,p) == 0)
+      if (GetPixelReadMask(image,p) == 0)
         {
           p+=GetPixelChannels(image);
           q+=GetPixelChannels(reconstruct_image);
@@ -911,7 +911,7 @@ static MagickBooleanType GetNormalizedCrossCorrelationDistortion(
       register ssize_t
         i;
 
-      if (GetPixelMask(image,p) == 0)
+      if (GetPixelReadMask(image,p) == 0)
         {
           p+=GetPixelChannels(image);
           q+=GetPixelChannels(reconstruct_image);
@@ -1030,7 +1030,7 @@ static MagickBooleanType GetPeakAbsoluteDistortion(const Image *image,
       register ssize_t
         i;
 
-      if (GetPixelMask(image,p) == 0)
+      if (GetPixelReadMask(image,p) == 0)
         {
           p+=GetPixelChannels(image);
           q+=GetPixelChannels(reconstruct_image);
@@ -1439,7 +1439,7 @@ MagickExport MagickBooleanType IsImagesEqual(Image *image,
       register ssize_t
         i;
 
-      if (GetPixelMask(image,p) == 0)
+      if (GetPixelReadMask(image,p) == 0)
         {
           p+=GetPixelChannels(image);
           q+=GetPixelChannels(reconstruct_image);
@@ -1645,7 +1645,7 @@ MagickExport Image *SimilarityImage(Image *image,const Image *reference,
           offset->y=y;
           *similarity_metric=similarity;
         }
-      if (GetPixelMask(similarity_image,q) == 0)
+      if (GetPixelReadMask(similarity_image,q) == 0)
         {
           q+=GetPixelChannels(similarity_image);
           continue;
diff --git a/MagickCore/composite.c b/MagickCore/composite.c
index 306750a5a..2ce5dc456 100644
--- a/MagickCore/composite.c
+++ b/MagickCore/composite.c
@@ -431,7 +431,7 @@ static MagickBooleanType CompositeOverImage(Image *image,
               Sc: source color.
               Dc: destination color.
           */
-          if (GetPixelMask(image,q) == 0)
+          if (GetPixelReadMask(image,q) == 0)
             {
               q+=GetPixelChannels(image);
               continue;
@@ -457,7 +457,7 @@ static MagickBooleanType CompositeOverImage(Image *image,
           Sa:  normalized source alpha.
           Da:  normalized destination alpha.
       */
-      if (GetPixelMask(composite_image,p) == 0)
+      if (GetPixelReadMask(composite_image,p) == 0)
         {
           p+=GetPixelChannels(composite_image);
           channels=GetPixelChannels(composite_image);
@@ -645,7 +645,7 @@ MagickExport MagickBooleanType CompositeImage(Image *image,
           register ssize_t
             i;
 
-          if (GetPixelMask(composite_image,p) == 0)
+          if (GetPixelReadMask(composite_image,p) == 0)
             {
               p+=GetPixelChannels(composite_image);
               q+=GetPixelChannels(image);
@@ -1285,7 +1285,7 @@ MagickExport MagickBooleanType CompositeImage(Image *image,
           */
           (void) GetOneVirtualPixel(composite_image,x-x_offset,y-y_offset,
             source,exception);
-          if (GetPixelMask(image,q) == 0)
+          if (GetPixelReadMask(image,q) == 0)
             {
               q+=GetPixelChannels(image);
               continue;
@@ -1451,7 +1451,7 @@ MagickExport MagickBooleanType CompositeImage(Image *image,
           break;
         }
       }
-      if (GetPixelMask(image,q) == 0)
+      if (GetPixelReadMask(image,q) == 0)
         {
           p+=GetPixelChannels(composite_image);
           q+=GetPixelChannels(image);
@@ -2459,7 +2459,7 @@ MagickExport MagickBooleanType TextureImage(Image *image,const Image *texture,
         register ssize_t
           i;
 
-        if (GetPixelMask(image,q) == 0)
+        if (GetPixelReadMask(image,q) == 0)
           {
             p+=GetPixelChannels(texture_image);
             q+=GetPixelChannels(image);
diff --git a/MagickCore/decorate.c b/MagickCore/decorate.c
index 455a6f45c..57b18c776 100644
--- a/MagickCore/decorate.c
+++ b/MagickCore/decorate.c
@@ -451,7 +451,7 @@ MagickExport Image *FrameImage(const Image *image,const FrameInfo *frame_info,
           register ssize_t
             i;
 
-          if (GetPixelMask(image,q) == 0)
+          if (GetPixelReadMask(image,q) == 0)
             {
               p+=GetPixelChannels(image);
               q+=GetPixelChannels(frame_image);
@@ -720,7 +720,7 @@ MagickExport MagickBooleanType RaiseImage(Image *image,
       }
     for (x=0; x < y; x++)
     {
-      if (GetPixelMask(image,q) == 0)
+      if (GetPixelReadMask(image,q) == 0)
         {
           q+=GetPixelChannels(image);
           continue;
@@ -738,7 +738,7 @@ MagickExport MagickBooleanType RaiseImage(Image *image,
     }
     for ( ; x < (ssize_t) (image->columns-y); x++)
     {
-      if (GetPixelMask(image,q) == 0)
+      if (GetPixelReadMask(image,q) == 0)
         {
           q+=GetPixelChannels(image);
           continue;
@@ -756,7 +756,7 @@ MagickExport MagickBooleanType RaiseImage(Image *image,
     }
     for ( ; x < (ssize_t) image->columns; x++)
     {
-      if (GetPixelMask(image,q) == 0)
+      if (GetPixelReadMask(image,q) == 0)
         {
           q+=GetPixelChannels(image);
           continue;
@@ -810,7 +810,7 @@ MagickExport MagickBooleanType RaiseImage(Image *image,
       }
     for (x=0; x < (ssize_t) raise_info->width; x++)
     {
-      if (GetPixelMask(image,q) == 0)
+      if (GetPixelReadMask(image,q) == 0)
         {
           q+=GetPixelChannels(image);
           continue;
@@ -830,7 +830,7 @@ MagickExport MagickBooleanType RaiseImage(Image *image,
       q+=GetPixelChannels(image);
     for ( ; x < (ssize_t) image->columns; x++)
     {
-      if (GetPixelMask(image,q) == 0)
+      if (GetPixelReadMask(image,q) == 0)
         {
           q+=GetPixelChannels(image);
           continue;
@@ -884,7 +884,7 @@ MagickExport MagickBooleanType RaiseImage(Image *image,
       }
     for (x=0; x < (ssize_t) (image->rows-y); x++)
     {
-      if (GetPixelMask(image,q) == 0)
+      if (GetPixelReadMask(image,q) == 0)
         {
           q+=GetPixelChannels(image);
           continue;
@@ -915,7 +915,7 @@ MagickExport MagickBooleanType RaiseImage(Image *image,
     }
     for ( ; x < (ssize_t) image->columns; x++)
     {
-      if (GetPixelMask(image,q) == 0)
+      if (GetPixelReadMask(image,q) == 0)
         {
           q+=GetPixelChannels(image);
           continue;
diff --git a/MagickCore/distribute-cache.c b/MagickCore/distribute-cache.c
index b9c2b17ee..2a8206194 100644
--- a/MagickCore/distribute-cache.c
+++ b/MagickCore/distribute-cache.c
@@ -452,9 +452,10 @@ static MagickBooleanType OpenDistributeCache(SplayTreeInfo *registry,
   if (image == (Image *) NULL)
     return(MagickFalse);
   length=sizeof(image->storage_class)+sizeof(image->colorspace)+
-    sizeof(image->alpha_trait)+sizeof(image->mask)+sizeof(image->columns)+
-    sizeof(image->rows)+sizeof(image->number_channels)+MaxPixelChannels*
-    sizeof(*image->channel_map)+sizeof(image->metacontent_extent);
+    sizeof(image->alpha_trait)+sizeof(image->read_mask)+
+    sizeof(image->write_mask)+sizeof(image->columns)+sizeof(image->rows)+
+    sizeof(image->number_channels)+MaxPixelChannels*sizeof(*image->channel_map)+
+    sizeof(image->metacontent_extent);
   count=dpc_read(file,length,message);
   if (count != (MagickOffsetType) length)
     return(MagickFalse);
@@ -468,8 +469,10 @@ static MagickBooleanType OpenDistributeCache(SplayTreeInfo *registry,
   p+=sizeof(image->colorspace);
   (void) memcpy(&image->alpha_trait,p,sizeof(image->alpha_trait));
   p+=sizeof(image->alpha_trait);
-  (void) memcpy(&image->mask,p,sizeof(image->mask));
-  p+=sizeof(image->mask);
+  (void) memcpy(&image->read_mask,p,sizeof(image->read_mask));
+  p+=sizeof(image->read_mask);
+  (void) memcpy(&image->write_mask,p,sizeof(image->write_mask));
+  p+=sizeof(image->write_mask);
   (void) memcpy(&image->columns,p,sizeof(image->columns));
   p+=sizeof(image->columns);
   (void) memcpy(&image->rows,p,sizeof(image->rows));
@@ -1084,8 +1087,10 @@ MagickPrivate MagickBooleanType OpenDistributePixelCache(
   p+=sizeof(image->colorspace);
   (void) memcpy(p,&image->alpha_trait,sizeof(image->alpha_trait));
   p+=sizeof(image->alpha_trait);
-  (void) memcpy(p,&image->mask,sizeof(image->mask));
-  p+=sizeof(image->mask);
+  (void) memcpy(p,&image->read_mask,sizeof(image->read_mask));
+  p+=sizeof(image->read_mask);
+  (void) memcpy(p,&image->write_mask,sizeof(image->write_mask));
+  p+=sizeof(image->write_mask);
   (void) memcpy(p,&image->columns,sizeof(image->columns));
   p+=sizeof(image->columns);
   (void) memcpy(p,&image->rows,sizeof(image->rows));
diff --git a/MagickCore/effect.c b/MagickCore/effect.c
index 18874229b..3b5ac93a6 100644
--- a/MagickCore/effect.c
+++ b/MagickCore/effect.c
@@ -384,7 +384,7 @@ MagickExport Image *AdaptiveBlurImage(const Image *image,const double radius,
             (blur_traits == UndefinedPixelTrait))
           continue;
         if (((blur_traits & CopyPixelTrait) != 0) ||
-            (GetPixelMask(image,p+center) == 0))
+            (GetPixelReadMask(image,p+center) == 0))
           {
             SetPixelChannel(blur_image,channel,p[center+i],q);
             continue;
@@ -709,7 +709,7 @@ MagickExport Image *AdaptiveSharpenImage(const Image *image,const double radius,
             (sharp_traits == UndefinedPixelTrait))
           continue;
         if (((sharp_traits & CopyPixelTrait) != 0) ||
-            (GetPixelMask(image,p+center) == 0))
+            (GetPixelReadMask(image,p+center) == 0))
           {
             SetPixelChannel(sharp_image,channel,p[center+i],q);
             continue;
@@ -1617,7 +1617,7 @@ MagickExport Image *MotionBlurImage(const Image *image,const double radius,
             (blur_traits == UndefinedPixelTrait))
           continue;
         if (((blur_traits & CopyPixelTrait) != 0) ||
-            (GetPixelMask(image,p) == 0))
+            (GetPixelReadMask(image,p) == 0))
           {
             SetPixelChannel(blur_image,channel,p[i],q);
             continue;
@@ -2410,7 +2410,7 @@ MagickExport Image *RadialBlurImage(const Image *image,const double angle,
             (blur_traits == UndefinedPixelTrait))
           continue;
         if (((blur_traits & CopyPixelTrait) != 0) ||
-            (GetPixelMask(image,p) == 0))
+            (GetPixelReadMask(image,p) == 0))
           {
             SetPixelChannel(blur_image,channel,p[i],q);
             continue;
@@ -2719,7 +2719,7 @@ MagickExport Image *SelectiveBlurImage(const Image *image,const double radius,
             (blur_traits == UndefinedPixelTrait))
           continue;
         if (((blur_traits & CopyPixelTrait) != 0) ||
-            (GetPixelMask(image,p+center) == 0))
+            (GetPixelReadMask(image,p+center) == 0))
           {
             SetPixelChannel(blur_image,channel,p[center+i],q);
             continue;
@@ -3010,7 +3010,7 @@ MagickExport Image *ShadeImage(const Image *image,const MagickBooleanType gray,
             (shade_traits == UndefinedPixelTrait))
           continue;
         if (((shade_traits & CopyPixelTrait) != 0) ||
-            (GetPixelMask(linear_image,center) == 0))
+            (GetPixelReadMask(linear_image,center) == 0))
           {
             SetPixelChannel(shade_image,channel,center[i],q);
             continue;
@@ -3444,7 +3444,7 @@ MagickExport Image *UnsharpMaskImage(const Image *image,const double radius,
             (unsharp_traits == UndefinedPixelTrait))
           continue;
         if (((unsharp_traits & CopyPixelTrait) != 0) ||
-            (GetPixelMask(image,p) != 0))
+            (GetPixelReadMask(image,p) != 0))
           {
             SetPixelChannel(unsharp_image,channel,p[i],q);
             continue;
diff --git a/MagickCore/enhance.c b/MagickCore/enhance.c
index fbba44c55..77a5be8a4 100644
--- a/MagickCore/enhance.c
+++ b/MagickCore/enhance.c
@@ -374,7 +374,7 @@ MagickExport MagickBooleanType ClutImage(Image *image,const Image *clut_image,
     GetPixelInfo(image,&pixel);
     for (x=0; x < (ssize_t) image->columns; x++)
     {
-      if (GetPixelMask(image,q) == 0)
+      if (GetPixelReadMask(image,q) == 0)
         {
           q+=GetPixelChannels(image);
           continue;
@@ -1220,7 +1220,7 @@ MagickExport MagickBooleanType ContrastStretchImage(Image *image,
       register ssize_t
         i;
 
-      if (GetPixelMask(image,q) == 0)
+      if (GetPixelReadMask(image,q) == 0)
         {
           q+=GetPixelChannels(image);
           continue;
@@ -1374,7 +1374,7 @@ MagickExport Image *EnhanceImage(const Image *image,ExceptionInfo *exception)
       register ssize_t
         i;
 
-      if (GetPixelMask(image,p) == 0)
+      if (GetPixelReadMask(image,p) == 0)
         {
           p+=GetPixelChannels(image);
           q+=GetPixelChannels(enhance_image);
@@ -1675,7 +1675,7 @@ MagickExport MagickBooleanType EqualizeImage(Image *image,
       register ssize_t
         i;
 
-      if (GetPixelMask(image,q) == 0)
+      if (GetPixelReadMask(image,q) == 0)
         {
           q+=GetPixelChannels(image);
           continue;
@@ -1836,7 +1836,7 @@ MagickExport MagickBooleanType GammaImage(Image *image,const double gamma,
       register ssize_t
         i;
 
-      if (GetPixelMask(image,q) == 0)
+      if (GetPixelReadMask(image,q) == 0)
         {
           q+=GetPixelChannels(image);
           continue;
@@ -1980,7 +1980,7 @@ MagickExport MagickBooleanType GrayscaleImage(Image *image,
         red,
         intensity;
 
-      if (GetPixelMask(image,q) == 0)
+      if (GetPixelReadMask(image,q) == 0)
         {
           q+=GetPixelChannels(image);
           continue;
@@ -2390,7 +2390,7 @@ MagickExport MagickBooleanType LevelImage(Image *image,const double black_point,
       register ssize_t
         i;
 
-      if (GetPixelMask(image,q) == 0)
+      if (GetPixelReadMask(image,q) == 0)
         {
           q+=GetPixelChannels(image);
           continue;
@@ -2545,7 +2545,7 @@ MagickExport MagickBooleanType LevelizeImage(Image *image,
       register ssize_t
         i;
 
-      if (GetPixelMask(image,q) == 0)
+      if (GetPixelReadMask(image,q) == 0)
         {
           q+=GetPixelChannels(image);
           continue;
@@ -3347,7 +3347,7 @@ MagickExport MagickBooleanType NegateImage(Image *image,
           register ssize_t
             i;
 
-          if ((GetPixelMask(image,q) == 0) ||
+          if ((GetPixelReadMask(image,q) == 0) ||
               (IsPixelGray(image,q) != MagickFalse))
             {
               q+=GetPixelChannels(image);
@@ -3411,7 +3411,7 @@ MagickExport MagickBooleanType NegateImage(Image *image,
       register ssize_t
         i;
 
-      if (GetPixelMask(image,q) == 0)
+      if (GetPixelReadMask(image,q) == 0)
         {
           q+=GetPixelChannels(image);
           continue;
@@ -3715,7 +3715,7 @@ MagickExport MagickBooleanType SigmoidalContrastImage(Image *image,
       register ssize_t
         i;
 
-      if (GetPixelMask(image,q) == 0)
+      if (GetPixelReadMask(image,q) == 0)
         {
           q+=GetPixelChannels(image);
           continue;
diff --git a/MagickCore/fx.c b/MagickCore/fx.c
index d94bfeeb3..bfddc3dbb 100644
--- a/MagickCore/fx.c
+++ b/MagickCore/fx.c
@@ -360,7 +360,7 @@ MagickExport Image *AddNoiseImage(const Image *image,const NoiseType noise_type,
             (noise_traits == UndefinedPixelTrait))
           continue;
         if (((noise_traits & CopyPixelTrait) != 0) ||
-            (GetPixelMask(image,p) == 0))
+            (GetPixelReadMask(image,p) == 0))
           {
             SetPixelChannel(noise_image,channel,p[i],q);
             continue;
@@ -777,7 +777,7 @@ MagickExport Image *ColorizeImage(const Image *image,const char *blend,
             (colorize_traits == UndefinedPixelTrait))
           continue;
         if (((colorize_traits & CopyPixelTrait) != 0) ||
-            (GetPixelMask(image,p) == 0))
+            (GetPixelReadMask(image,p) == 0))
           {
             SetPixelChannel(colorize_image,channel,p[i],q);
             continue;
@@ -3102,7 +3102,7 @@ MagickExport Image *FxImage(const Image *image,const char *expression,
             (fx_traits == UndefinedPixelTrait))
           continue;
         if (((fx_traits & CopyPixelTrait) != 0) ||
-            (GetPixelMask(image,p) == 0))
+            (GetPixelReadMask(image,p) == 0))
           {
             SetPixelChannel(fx_image,channel,p[i],q);
             continue;
@@ -3285,7 +3285,7 @@ MagickExport Image *ImplodeImage(const Image *image,const double amount,
       /*
         Determine if the pixel is within an ellipse.
       */
-      if (GetPixelMask(image,p) == 0)
+      if (GetPixelReadMask(image,p) == 0)
         {
           p+=GetPixelChannels(image);
           q+=GetPixelChannels(implode_image);
@@ -3527,7 +3527,7 @@ MagickExport Image *MorphImages(const Image *image,const size_t number_frames,
                 (morph_traits == UndefinedPixelTrait))
               continue;
             if (((morph_traits & CopyPixelTrait) != 0) ||
-                (GetPixelMask(image,p) == 0))
+                (GetPixelReadMask(image,p) == 0))
               {
                 SetPixelChannel(morph_image,channel,p[i],q);
                 continue;
@@ -4449,7 +4449,7 @@ MagickExport Image *SketchImage(const Image *image,const double radius,
       register ssize_t
         i;
 
-      if (GetPixelMask(random_image,q) == 0)
+      if (GetPixelReadMask(random_image,q) == 0)
         {
           q+=GetPixelChannels(random_image);
           continue;
@@ -4613,7 +4613,7 @@ MagickExport MagickBooleanType SolarizeImage(Image *image,
       register ssize_t
         i;
 
-      if (GetPixelMask(image,q) == 0)
+      if (GetPixelReadMask(image,q) == 0)
         {
           q+=GetPixelChannels(image);
           continue;
@@ -5099,7 +5099,7 @@ MagickExport Image *SwirlImage(const Image *image,double degrees,
       /*
         Determine if the pixel is within an ellipse.
       */
-      if (GetPixelMask(image,p) == 0)
+      if (GetPixelReadMask(image,p) == 0)
         {
           p+=GetPixelChannels(image);
           q+=GetPixelChannels(swirl_image);
@@ -5337,7 +5337,7 @@ MagickExport Image *TintImage(const Image *image,const char *blend,
             (tint_traits == UndefinedPixelTrait))
           continue;
         if (((tint_traits & CopyPixelTrait) != 0) ||
-            (GetPixelMask(image,p) == 0))
+            (GetPixelReadMask(image,p) == 0))
           {
             SetPixelChannel(tint_image,channel,p[i],q);
             continue;
diff --git a/MagickCore/image.c b/MagickCore/image.c
index 915a6a8c4..71e4a9bc9 100644
--- a/MagickCore/image.c
+++ b/MagickCore/image.c
@@ -577,7 +577,7 @@ MagickExport Image *AppendImages(const Image *images,
       GetPixelInfo(image,&pixel);
       for (x=0; x < (ssize_t) image->columns; x++)
       {
-        if (GetPixelMask(image,p) == 0)
+        if (GetPixelReadMask(image,p) == 0)
           {
             p+=GetPixelChannels(image);
             q+=GetPixelChannels(append_image);
@@ -821,7 +821,8 @@ MagickExport Image *CloneImage(const Image *image,const size_t columns,
   clone_image->number_meta_channels=image->number_meta_channels;
   clone_image->metacontent_extent=image->metacontent_extent;
   clone_image->colorspace=image->colorspace;
-  clone_image->mask=image->mask;
+  clone_image->read_mask=image->read_mask;
+  clone_image->write_mask=image->write_mask;
   clone_image->alpha_trait=image->alpha_trait;
   clone_image->columns=image->columns;
   clone_image->rows=image->rows;
@@ -1320,7 +1321,7 @@ MagickExport Image *GetImageMask(const Image *image,ExceptionInfo *exception)
     return((Image *) NULL);
   status=MagickTrue;
   (void) SetImageColorspace(mask_image,GRAYColorspace,exception);
-  mask_image->mask=MagickFalse;
+  mask_image->read_mask=MagickFalse;
   image_view=AcquireVirtualCacheView(image,exception);
   mask_view=AcquireAuthenticCacheView(mask_image,exception);
   for (y=0; y < (ssize_t) image->rows; y++)
@@ -1346,7 +1347,7 @@ MagickExport Image *GetImageMask(const Image *image,ExceptionInfo *exception)
       }
     for (x=0; x < (ssize_t) image->columns; x++)
     {
-      SetPixelGray(mask_image,GetPixelMask(image,p),q);
+      SetPixelGray(mask_image,GetPixelReadMask(image,p),q);
       p+=GetPixelChannels(image);
       q+=GetPixelChannels(mask_image);
     }
@@ -1686,7 +1687,7 @@ MagickExport MagickBooleanType IsHighDynamicRangeImage(const Image *image,
       register ssize_t
         i;
 
-      if (GetPixelMask(image,p) == 0)
+      if (GetPixelReadMask(image,p) == 0)
         {
           p+=GetPixelChannels(image);
           continue;
@@ -3059,10 +3060,10 @@ MagickExport MagickBooleanType SetImageMask(Image *image,const Image *mask,
   assert(image->signature == MagickSignature);
   if (mask == (const Image *) NULL)
     {
-      image->mask=MagickFalse;
+      image->read_mask=MagickFalse;
       return(SyncImagePixelCache(image,exception));
     }
-  image->mask=MagickTrue;
+  image->read_mask=MagickTrue;
   if (SyncImagePixelCache(image,exception) == MagickFalse)
     return(MagickFalse);
   status=MagickTrue;
@@ -3094,7 +3095,7 @@ MagickExport MagickBooleanType SetImageMask(Image *image,const Image *mask,
       }
     for (x=0; x < (ssize_t) image->columns; x++)
     {
-      SetPixelMask(image,ClampToQuantum(GetPixelIntensity(mask,p)),q);
+      SetPixelReadMask(image,ClampToQuantum(GetPixelIntensity(mask,p)),q);
       p+=GetPixelChannels(mask);
       q+=GetPixelChannels(image);
     }
diff --git a/MagickCore/image.h b/MagickCore/image.h
index ebd0f67b8..c8ca0040c 100644
--- a/MagickCore/image.h
+++ b/MagickCore/image.h
@@ -270,7 +270,8 @@ struct _Image
     ping;              /* no image data read, just attributes */
 
   MagickBooleanType
-    mask;
+    read_mask,
+    write_mask;
 
   PixelTrait
     alpha_trait;       /* is transparency channel defined and active */
diff --git a/MagickCore/morphology.c b/MagickCore/morphology.c
index b91a23bf6..5487a7882 100644
--- a/MagickCore/morphology.c
+++ b/MagickCore/morphology.c
@@ -2696,7 +2696,7 @@ static ssize_t MorphologyPrimitive(const Image *image,Image *morphology_image,
                 (morphology_traits == UndefinedPixelTrait))
               continue;
             if (((morphology_traits & CopyPixelTrait) != 0) ||
-                (GetPixelMask(image,p+center) == 0))
+                (GetPixelReadMask(image,p+center) == 0))
               {
                 SetPixelChannel(morphology_image,channel,p[center+i],q);
                 continue;
@@ -2842,7 +2842,7 @@ static ssize_t MorphologyPrimitive(const Image *image,Image *morphology_image,
             (morphology_traits == UndefinedPixelTrait))
           continue;
         if (((morphology_traits & CopyPixelTrait) != 0) ||
-            (GetPixelMask(image,p+center) == 0))
+            (GetPixelReadMask(image,p+center) == 0))
           {
             SetPixelChannel(morphology_image,channel,p[center+i],q);
             continue;
@@ -3296,7 +3296,7 @@ static ssize_t MorphologyPrimitiveDirect(Image *image,
         if (traits == UndefinedPixelTrait)
           continue;
         if (((traits & CopyPixelTrait) != 0) ||
-            (GetPixelMask(image,p+center) == 0))
+            (GetPixelReadMask(image,p+center) == 0))
           continue;
         pixels=p;
         pixel=(double) QuantumRange;
@@ -3459,7 +3459,7 @@ static ssize_t MorphologyPrimitiveDirect(Image *image,
         if (traits == UndefinedPixelTrait)
           continue;
         if (((traits & CopyPixelTrait) != 0) ||
-             (GetPixelMask(image,p+center) == 0))
+             (GetPixelReadMask(image,p+center) == 0))
           continue;
         pixels=p;
         pixel=(double) QuantumRange;
diff --git a/MagickCore/option.c b/MagickCore/option.c
index defde3132..fef29344a 100644
--- a/MagickCore/option.c
+++ b/MagickCore/option.c
@@ -1428,10 +1428,11 @@ static const OptionInfo
     { "K", BlackPixelChannel, UndefinedOptionFlag, MagickFalse },
     { "M", MagentaPixelChannel, UndefinedOptionFlag, MagickFalse },
     { "Magenta", MagentaPixelChannel, UndefinedOptionFlag, MagickFalse },
-    { "Mask", MaskPixelChannel, UndefinedOptionFlag, MagickFalse },
     { "R", RedPixelChannel, UndefinedOptionFlag, MagickFalse },
+    { "ReadMask", ReadMaskPixelChannel, UndefinedOptionFlag, MagickFalse },
     { "Red", RedPixelChannel, UndefinedOptionFlag, MagickFalse },
     { "Sync", SyncPixelChannel, UndefinedOptionFlag, MagickFalse },
+    { "WriteMask", WriteMaskPixelChannel, UndefinedOptionFlag, MagickFalse },
     { "Y", YellowPixelChannel, UndefinedOptionFlag, MagickFalse },
     { "Yellow", YellowPixelChannel, UndefinedOptionFlag, MagickFalse },
     { (char *) NULL, UndefinedPixelChannel, UndefinedOptionFlag, MagickFalse }
diff --git a/MagickCore/paint.c b/MagickCore/paint.c
index 9259a99f8..e9d1df8fe 100644
--- a/MagickCore/paint.c
+++ b/MagickCore/paint.c
@@ -676,7 +676,7 @@ MagickExport Image *OilPaintImage(const Image *image,const double radius,
             (paint_traits == UndefinedPixelTrait))
           continue;
         if (((paint_traits & CopyPixelTrait) != 0) ||
-            (GetPixelMask(linear_image,p) == 0))
+            (GetPixelReadMask(linear_image,p) == 0))
           {
             SetPixelChannel(paint_image,channel,p[center+i],q);
             continue;
diff --git a/MagickCore/pixel-accessor.h b/MagickCore/pixel-accessor.h
index d11ea4507..4d6724cc6 100644
--- a/MagickCore/pixel-accessor.h
+++ b/MagickCore/pixel-accessor.h
@@ -283,17 +283,25 @@ static inline PixelTrait GetPixelMagentaTraits(const Image *restrict image)
   return(image->channel_map[MagentaPixelChannel].traits);
 }
 
-static inline Quantum GetPixelMask(const Image *restrict image,
+static inline Quantum GetPixelReadMask(const Image *restrict image,
   const Quantum *restrict pixel)
 {
-  if (image->channel_map[MaskPixelChannel].traits == UndefinedPixelTrait)
+  if (image->channel_map[ReadMaskPixelChannel].traits == UndefinedPixelTrait)
     return((Quantum) QuantumRange);
-  return(pixel[image->channel_map[MaskPixelChannel].offset]);
+  return(pixel[image->channel_map[ReadMaskPixelChannel].offset]);
 }
 
-static inline PixelTrait GetPixelMaskTraits(const Image *restrict image)
+static inline Quantum GetPixelWriteMask(const Image *restrict image,
+  const Quantum *restrict pixel)
+{
+  if (image->channel_map[WriteMaskPixelChannel].traits == UndefinedPixelTrait)
+    return((Quantum) QuantumRange);
+  return(pixel[image->channel_map[WriteMaskPixelChannel].offset]);
+}
+
+static inline PixelTrait GetPixelReadMaskTraits(const Image *restrict image)
 {
-  return(image->channel_map[MaskPixelChannel].traits);
+  return(image->channel_map[ReadMaskPixelChannel].traits);
 }
 
 static inline size_t GetPixelMetaChannels(const Image *restrict image)
@@ -674,11 +682,18 @@ static inline void SetPixelMagentaTraits(Image *image,const PixelTrait traits)
   image->channel_map[MagentaPixelChannel].traits=traits;
 }
 
-static inline void SetPixelMask(const Image *restrict image,
+static inline void SetPixelReadMask(const Image *restrict image,
+  const Quantum mask,Quantum *restrict pixel)
+{
+  if (image->channel_map[ReadMaskPixelChannel].traits != UndefinedPixelTrait)
+    pixel[image->channel_map[ReadMaskPixelChannel].offset]=mask;
+}
+
+static inline void SetPixelWriteMask(const Image *restrict image,
   const Quantum mask,Quantum *restrict pixel)
 {
-  if (image->channel_map[MaskPixelChannel].traits != UndefinedPixelTrait)
-    pixel[image->channel_map[MaskPixelChannel].offset]=mask;
+  if (image->channel_map[WriteMaskPixelChannel].traits != UndefinedPixelTrait)
+    pixel[image->channel_map[WriteMaskPixelChannel].offset]=mask;
 }
 
 static inline void SetPixelMetacontentExtent(Image *image,const size_t extent)
diff --git a/MagickCore/pixel.c b/MagickCore/pixel.c
index 5f3917855..3d9ce6341 100644
--- a/MagickCore/pixel.c
+++ b/MagickCore/pixel.c
@@ -130,7 +130,7 @@
         name="alpha"; \
         break; \
       } \
-      case MaskPixelChannel: \
+      case ReadMaskPixelChannel: \
       { \
         name="mask"; \
         break; \
@@ -4116,8 +4116,10 @@ MagickExport void InitializePixelChannelMap(Image *image)
     SetPixelChannelAttributes(image,AlphaPixelChannel,CopyPixelTrait,n++);
   if (image->storage_class == PseudoClass)
     SetPixelChannelAttributes(image,IndexPixelChannel,CopyPixelTrait,n++);
-  if (image->mask != MagickFalse)
-    SetPixelChannelAttributes(image,MaskPixelChannel,CopyPixelTrait,n++);
+  if (image->read_mask != MagickFalse)
+    SetPixelChannelAttributes(image,ReadMaskPixelChannel,CopyPixelTrait,n++);
+  if (image->write_mask != MagickFalse)
+    SetPixelChannelAttributes(image,WriteMaskPixelChannel,CopyPixelTrait,n++);
   assert((n+image->number_meta_channels) < MaxPixelChannels);
   for (i=0; i < (ssize_t) image->number_meta_channels; i++)
     SetPixelChannelAttributes(image,(PixelChannel) (MetaPixelChannel+i),
@@ -6068,8 +6070,10 @@ MagickExport void SetPixelChannelMask(Image *image,
   }
   if (image->storage_class == PseudoClass)
     SetPixelChannelTraits(image,IndexPixelChannel,CopyPixelTrait);
-  if (image->mask != MagickFalse)
-    SetPixelChannelTraits(image,MaskPixelChannel,CopyPixelTrait);
+  if (image->read_mask != MagickFalse)
+    SetPixelChannelTraits(image,ReadMaskPixelChannel,CopyPixelTrait);
+  if (image->write_mask != MagickFalse)
+    SetPixelChannelTraits(image,WriteMaskPixelChannel,CopyPixelTrait);
   if (image->debug != MagickFalse)
     LogPixelChannels(image);
 }
diff --git a/MagickCore/pixel.h b/MagickCore/pixel.h
index 851501c8a..b935f4d44 100644
--- a/MagickCore/pixel.h
+++ b/MagickCore/pixel.h
@@ -44,8 +44,9 @@ typedef enum
   AlphaChannel = 0x0010,
   OpacityChannel = 0x0010,
   IndexChannel = 0x0020,
-  MaskChannel = 0x0040,
-  MetaChannel = 0x0080,
+  ReadMaskChannel = 0x0040,
+  WriteMaskChannel = 0x0080,
+  MetaChannel = 0x0100,
   CompositeChannels = 0x002F,
   AllChannels = 0x7ffffff,
   /*
@@ -80,9 +81,10 @@ typedef enum
   BlackPixelChannel = 3,
   AlphaPixelChannel = 4,
   IndexPixelChannel = 5,
-  MaskPixelChannel = 6,                 /* Image Write Mask */
-  MetaPixelChannel = 7,                 /* ??? */
-  IntensityPixelChannel = MaxPixelChannels,  /* what are these ??? */
+  ReadMaskPixelChannel = 6,
+  WriteMaskPixelChannel = 7,
+  MetaPixelChannel = 8,
+  IntensityPixelChannel = MaxPixelChannels,
   CompositePixelChannel = MaxPixelChannels,
   SyncPixelChannel = MaxPixelChannels+1
 } PixelChannel;  /* must correspond to ChannelType */
diff --git a/MagickCore/quantum-export.c b/MagickCore/quantum-export.c
index 839e898de..8bd8c76a9 100644
--- a/MagickCore/quantum-export.c
+++ b/MagickCore/quantum-export.c
@@ -3237,7 +3237,7 @@ MagickExport size_t ExportQuantumPixels(const Image *image,
         register ssize_t
           i;
 
-        if (GetPixelMask(image,q) == 0)
+        if (GetPixelReadMask(image,q) == 0)
           {
             q+=GetPixelChannels(image);
             continue;
diff --git a/MagickCore/quantum-import.c b/MagickCore/quantum-import.c
index 406a7d706..cf20086f5 100644
--- a/MagickCore/quantum-import.c
+++ b/MagickCore/quantum-import.c
@@ -3604,7 +3604,7 @@ MagickExport size_t ImportQuantumPixels(const Image *image,
         register ssize_t
           i;
 
-        if (GetPixelMask(image,q) == 0)
+        if (GetPixelReadMask(image,q) == 0)
           {
             q+=GetPixelChannels(image);
             continue;
diff --git a/MagickCore/resize.c b/MagickCore/resize.c
index f618e93d4..4cbfbf6e8 100644
--- a/MagickCore/resize.c
+++ b/MagickCore/resize.c
@@ -1652,7 +1652,7 @@ MagickExport Image *InterpolativeResizeImage(const Image *image,
       register ssize_t
         i;
 
-      if (GetPixelMask(resize_image,q) == 0)
+      if (GetPixelReadMask(resize_image,q) == 0)
         {
           q+=GetPixelChannels(resize_image);
           continue;
@@ -2328,7 +2328,7 @@ static MagickBooleanType HorizontalFilter(const ResizeFilter *resize_filter,
             (resize_traits == UndefinedPixelTrait))
           continue;
         if (((resize_traits & CopyPixelTrait) != 0) ||
-            (GetPixelMask(resize_image,q) == 0))
+            (GetPixelReadMask(resize_image,q) == 0))
           {
             j=(ssize_t) (MagickMin(MagickMax(bisect,(double) start),(double)
               stop-1.0)+0.5);
@@ -2543,7 +2543,7 @@ static MagickBooleanType VerticalFilter(const ResizeFilter *resize_filter,
             (resize_traits == UndefinedPixelTrait))
           continue;
         if (((resize_traits & CopyPixelTrait) != 0) ||
-            (GetPixelMask(resize_image,q) == 0))
+            (GetPixelReadMask(resize_image,q) == 0))
           {
             j=(ssize_t) (MagickMin(MagickMax(bisect,(double) start),(double)
               stop-1.0)+0.5);
@@ -2864,7 +2864,7 @@ MagickExport Image *SampleImage(const Image *image,const size_t columns,
       register ssize_t
         i;
 
-      if (GetPixelMask(sample_image,q) == 0)
+      if (GetPixelReadMask(sample_image,q) == 0)
         {
           q+=GetPixelChannels(sample_image);
           continue;
@@ -3078,7 +3078,7 @@ MagickExport Image *ScaleImage(const Image *image,const size_t columns,
           }
         for (x=0; x < (ssize_t) image->columns; x++)
         {
-          if (GetPixelMask(image,p) == 0)
+          if (GetPixelReadMask(image,p) == 0)
             {
               p+=GetPixelChannels(image);
               continue;
@@ -3125,7 +3125,7 @@ MagickExport Image *ScaleImage(const Image *image,const size_t columns,
                 }
               for (x=0; x < (ssize_t) image->columns; x++)
               {
-                if (GetPixelMask(image,p) == 0)
+                if (GetPixelReadMask(image,p) == 0)
                   {
                     p+=GetPixelChannels(image);
                     continue;
@@ -3175,7 +3175,7 @@ MagickExport Image *ScaleImage(const Image *image,const size_t columns,
               }
             for (x=0; x < (ssize_t) image->columns; x++)
             {
-              if (GetPixelMask(image,p) == 0)
+              if (GetPixelReadMask(image,p) == 0)
                 {
                   p+=GetPixelChannels(image);
                   continue;
@@ -3228,7 +3228,7 @@ MagickExport Image *ScaleImage(const Image *image,const size_t columns,
         */
         for (x=0; x < (ssize_t) scale_image->columns; x++)
         {
-          if (GetPixelMask(scale_image,q) == 0)
+          if (GetPixelReadMask(scale_image,q) == 0)
             {
               q+=GetPixelChannels(scale_image);
               continue;
@@ -3334,7 +3334,7 @@ MagickExport Image *ScaleImage(const Image *image,const size_t columns,
       */
       for (x=0; x < (ssize_t) scale_image->columns; x++)
       {
-        if (GetPixelMask(scale_image,q) == 0)
+        if (GetPixelReadMask(scale_image,q) == 0)
           {
             q+=GetPixelChannels(scale_image);
             continue;
diff --git a/MagickCore/shear.c b/MagickCore/shear.c
index dc0b62a29..d22ee32e9 100644
--- a/MagickCore/shear.c
+++ b/MagickCore/shear.c
@@ -1093,7 +1093,7 @@ MagickExport Image *IntegralRotateImage(const Image *image,size_t rotations,
               register ssize_t
                 i;
 
-              if (GetPixelMask(image,tile_pixels) == 0)
+              if (GetPixelReadMask(image,tile_pixels) == 0)
                 {
                   tile_pixels-=width*GetPixelChannels(image);
                   q+=GetPixelChannels(rotate_image);
@@ -1180,7 +1180,7 @@ MagickExport Image *IntegralRotateImage(const Image *image,size_t rotations,
             i;
 
           q-=GetPixelChannels(rotate_image);
-          if (GetPixelMask(image,p) == 0)
+          if (GetPixelReadMask(image,p) == 0)
             {
               p+=GetPixelChannels(image);
               continue;
@@ -1303,7 +1303,7 @@ MagickExport Image *IntegralRotateImage(const Image *image,size_t rotations,
               register ssize_t
                 i;
 
-              if (GetPixelMask(image,tile_pixels) == 0)
+              if (GetPixelReadMask(image,tile_pixels) == 0)
                 {
                   tile_pixels+=width*GetPixelChannels(image);
                   q+=GetPixelChannels(rotate_image);
diff --git a/MagickCore/signature.c b/MagickCore/signature.c
index 6ca54b5b8..9c828b72d 100644
--- a/MagickCore/signature.c
+++ b/MagickCore/signature.c
@@ -526,7 +526,7 @@ MagickExport MagickBooleanType SignatureImage(Image *image,
       register ssize_t
         i;
 
-      if (GetPixelMask(image,p) == 0)
+      if (GetPixelReadMask(image,p) == 0)
         {
           p+=GetPixelChannels(image);
           continue;
diff --git a/MagickCore/statistic.c b/MagickCore/statistic.c
index 81ae530ad..415f48328 100644
--- a/MagickCore/statistic.c
+++ b/MagickCore/statistic.c
@@ -650,7 +650,7 @@ MagickExport Image *EvaluateImages(const Image *images,
             register ssize_t
               i;
 
-            if (GetPixelMask(next,p) == 0)
+            if (GetPixelReadMask(next,p) == 0)
               {
                 p+=GetPixelChannels(next);
                 continue;
@@ -708,7 +708,7 @@ MagickExport Image *EvaluateImages(const Image *images,
           register ssize_t
             i;
 
-          if (GetPixelMask(image,q) == 0)
+          if (GetPixelReadMask(image,q) == 0)
             {
               q+=GetPixelChannels(image);
               continue;
@@ -823,7 +823,7 @@ MagickExport MagickBooleanType EvaluateImage(Image *image,
         if (traits == UndefinedPixelTrait)
           continue;
         if (((traits & CopyPixelTrait) != 0) ||
-            (GetPixelMask(image,q) == 0))
+            (GetPixelReadMask(image,q) == 0))
           continue;
         q[i]=ClampToQuantum(ApplyEvaluateOperator(random_info[id],q[i],op,
           value));
@@ -1036,7 +1036,7 @@ MagickExport MagickBooleanType FunctionImage(Image *image,
       register ssize_t
         i;
 
-      if (GetPixelMask(image,q) == 0)
+      if (GetPixelReadMask(image,q) == 0)
         {
           q+=GetPixelChannels(image);
           continue;
@@ -1288,7 +1288,7 @@ MagickExport MagickBooleanType GetImageKurtosis(const Image *image,
       register ssize_t
         i;
 
-      if (GetPixelMask(image,p) == 0)
+      if (GetPixelReadMask(image,p) == 0)
         {
           p+=GetPixelChannels(image);
           continue;
@@ -1413,7 +1413,7 @@ MagickExport MagickBooleanType GetImageRange(const Image *image,double *minima,
       register ssize_t
         i;
 
-      if (GetPixelMask(image,p) == 0)
+      if (GetPixelReadMask(image,p) == 0)
         {
           p+=GetPixelChannels(image);
           continue;
@@ -1559,7 +1559,7 @@ MagickExport ChannelStatistics *GetImageStatistics(const Image *image,
       register ssize_t
         i;
 
-      if (GetPixelMask(image,p) == 0)
+      if (GetPixelReadMask(image,p) == 0)
         {
           p+=GetPixelChannels(image);
           continue;
@@ -1825,7 +1825,7 @@ MagickExport Image *PolynomialImage(const Image *images,
         register ssize_t
           i;
 
-        if (GetPixelMask(next,p) == 0)
+        if (GetPixelReadMask(next,p) == 0)
           {
             p+=GetPixelChannels(next);
             continue;
@@ -1859,7 +1859,7 @@ MagickExport Image *PolynomialImage(const Image *images,
       register ssize_t
         i;
 
-      if (GetPixelMask(image,q) == 0)
+      if (GetPixelReadMask(image,q) == 0)
         {
           q+=GetPixelChannels(image);
           continue;
@@ -2485,7 +2485,7 @@ MagickExport Image *StatisticImage(const Image *image,const StatisticType type,
             (statistic_traits == UndefinedPixelTrait))
           continue;
         if (((statistic_traits & CopyPixelTrait) != 0) ||
-            (GetPixelMask(image,p) == 0))
+            (GetPixelReadMask(image,p) == 0))
           {
             SetPixelChannel(statistic_image,channel,p[center+i],q);
             continue;
diff --git a/MagickCore/threshold.c b/MagickCore/threshold.c
index fb821da53..d39ba2301 100644
--- a/MagickCore/threshold.c
+++ b/MagickCore/threshold.c
@@ -273,7 +273,7 @@ MagickExport Image *AdaptiveThresholdImage(const Image *image,
           (threshold_traits == UndefinedPixelTrait))
         continue;
       if (((threshold_traits & CopyPixelTrait) != 0) ||
-          (GetPixelMask(image,p) == 0))
+          (GetPixelReadMask(image,p) == 0))
         {
           SetPixelChannel(threshold_image,channel,p[center+i],q);
           continue;
@@ -308,7 +308,7 @@ MagickExport Image *AdaptiveThresholdImage(const Image *image,
             (threshold_traits == UndefinedPixelTrait))
           continue;
         if (((threshold_traits & CopyPixelTrait) != 0) ||
-            (GetPixelMask(image,p) == 0))
+            (GetPixelReadMask(image,p) == 0))
           {
             SetPixelChannel(threshold_image,channel,p[center+i],q);
             continue;
@@ -454,7 +454,7 @@ MagickExport MagickBooleanType BilevelImage(Image *image,const double threshold,
       register ssize_t
         i;
 
-      if (GetPixelMask(image,q) == 0)
+      if (GetPixelReadMask(image,q) == 0)
         {
           q+=GetPixelChannels(image);
           continue;
@@ -619,7 +619,7 @@ MagickExport MagickBooleanType BlackThresholdImage(Image *image,
       register ssize_t
         i;
 
-      if (GetPixelMask(image,q) == 0)
+      if (GetPixelReadMask(image,q) == 0)
         {
           q+=GetPixelChannels(image);
           continue;
@@ -768,7 +768,7 @@ MagickExport MagickBooleanType ClampImage(Image *image,ExceptionInfo *exception)
       register ssize_t
         i;
 
-      if (GetPixelMask(image,q) == 0)
+      if (GetPixelReadMask(image,q) == 0)
         {
           q+=GetPixelChannels(image);
           continue;
@@ -1397,7 +1397,7 @@ MagickExport MagickBooleanType OrderedPosterizeImage(Image *image,
         n;
 
       n=0;
-      if (GetPixelMask(image,q) == 0)
+      if (GetPixelReadMask(image,q) == 0)
         {
           q+=GetPixelChannels(image);
           continue;
@@ -1561,7 +1561,7 @@ MagickExport MagickBooleanType PerceptibleImage(Image *image,
       register ssize_t
         i;
 
-      if (GetPixelMask(image,q) == 0)
+      if (GetPixelReadMask(image,q) == 0)
         {
           q+=GetPixelChannels(image);
           continue;
@@ -1725,7 +1725,7 @@ MagickExport MagickBooleanType RandomThresholdImage(Image *image,
       register ssize_t
         i;
 
-      if (GetPixelMask(image,q) == 0)
+      if (GetPixelReadMask(image,q) == 0)
         {
           q+=GetPixelChannels(image);
           continue;
@@ -1899,7 +1899,7 @@ MagickExport MagickBooleanType WhiteThresholdImage(Image *image,
       register ssize_t
         i;
 
-      if (GetPixelMask(image,q) == 0)
+      if (GetPixelReadMask(image,q) == 0)
         {
           q+=GetPixelChannels(image);
           continue;
diff --git a/MagickCore/transform.c b/MagickCore/transform.c
index bc95c641f..ba0e8295f 100644
--- a/MagickCore/transform.c
+++ b/MagickCore/transform.c
@@ -696,7 +696,7 @@ MagickExport Image *CropImage(const Image *image,const RectangleInfo *geometry,
       register ssize_t
         i;
 
-      if (GetPixelMask(image,p) == 0)
+      if (GetPixelReadMask(image,p) == 0)
         {
           p+=GetPixelChannels(image);
           q+=GetPixelChannels(crop_image);
@@ -1051,7 +1051,7 @@ MagickExport Image *ExcerptImage(const Image *image,
       register ssize_t
         i;
 
-      if (GetPixelMask(image,p) == 0)
+      if (GetPixelReadMask(image,p) == 0)
         {
           p+=GetPixelChannels(image);
           q+=GetPixelChannels(excerpt_image);
@@ -1251,7 +1251,7 @@ MagickExport Image *FlipImage(const Image *image,ExceptionInfo *exception)
       register ssize_t
         i;
 
-      if (GetPixelMask(image,p) == 0)
+      if (GetPixelReadMask(image,p) == 0)
         {
           p+=GetPixelChannels(image);
           q+=GetPixelChannels(flip_image);
@@ -1393,7 +1393,7 @@ MagickExport Image *FlopImage(const Image *image,ExceptionInfo *exception)
         i;
 
       q-=GetPixelChannels(flop_image);
-      if (GetPixelMask(image,p) == 0)
+      if (GetPixelReadMask(image,p) == 0)
         {
           p+=GetPixelChannels(image);
           continue;
@@ -1519,7 +1519,7 @@ static inline MagickBooleanType CopyImageRegion(Image *destination,
       register ssize_t
         i;
 
-      if (GetPixelMask(source,p) == 0)
+      if (GetPixelReadMask(source,p) == 0)
         {
           p+=GetPixelChannels(source);
           q+=GetPixelChannels(destination);
@@ -1837,7 +1837,7 @@ MagickExport Image *SpliceImage(const Image *image,
       register ssize_t
         i;
 
-      if (GetPixelMask(image,p) == 0)
+      if (GetPixelReadMask(image,p) == 0)
         {
           p+=GetPixelChannels(image);
           q+=GetPixelChannels(splice_image);
@@ -1863,7 +1863,7 @@ MagickExport Image *SpliceImage(const Image *image,
       register ssize_t
         i;
 
-      if (GetPixelMask(image,p) == 0)
+      if (GetPixelReadMask(image,p) == 0)
         {
           p+=GetPixelChannels(image);
           q+=GetPixelChannels(splice_image);
@@ -1932,7 +1932,7 @@ MagickExport Image *SpliceImage(const Image *image,
       register ssize_t
         i;
 
-      if (GetPixelMask(image,q) == 0)
+      if (GetPixelReadMask(image,q) == 0)
         {
           p+=GetPixelChannels(image);
           q+=GetPixelChannels(splice_image);
@@ -1958,7 +1958,7 @@ MagickExport Image *SpliceImage(const Image *image,
       register ssize_t
         i;
 
-      if (GetPixelMask(image,q) == 0)
+      if (GetPixelReadMask(image,q) == 0)
         {
           p+=GetPixelChannels(image);
           q+=GetPixelChannels(splice_image);
@@ -2267,7 +2267,7 @@ MagickExport Image *TransposeImage(const Image *image,ExceptionInfo *exception)
       register ssize_t
         i;
 
-      if (GetPixelMask(image,q) == 0)
+      if (GetPixelReadMask(image,q) == 0)
         {
           p+=GetPixelChannels(image);
           q+=GetPixelChannels(transpose_image);
@@ -2415,7 +2415,7 @@ MagickExport Image *TransverseImage(const Image *image,ExceptionInfo *exception)
         i;
 
       q-=GetPixelChannels(transverse_image);
-      if (GetPixelMask(image,p) == 0)
+      if (GetPixelReadMask(image,p) == 0)
         {
           p+=GetPixelChannels(image);
           continue;
diff --git a/PerlMagick/quantum/quantum.xs.in b/PerlMagick/quantum/quantum.xs.in
index cd40c8571..bf2486863 100644
--- a/PerlMagick/quantum/quantum.xs.in
+++ b/PerlMagick/quantum/quantum.xs.in
@@ -4589,7 +4589,7 @@ Get(ref,...)
                     *sv;
 
                   sv=NULL;
-                  if (image->mask == MagickFalse)
+                  if (image->read_mask == MagickFalse)
                     ClipImage(image,exception);
                   mask_image=GetImageMask(image,exception);
                   if (mask_image != (Image *) NULL)
@@ -4612,7 +4612,7 @@ Get(ref,...)
                     *sv;
 
                   sv=NULL;
-                  if (image->mask != MagickFalse)
+                  if (image->read_mask != MagickFalse)
                     ClipImage(image,exception);
                   mask_image=GetImageMask(image,exception);
                   if (mask_image != (Image *) NULL)
diff --git a/coders/clip.c b/coders/clip.c
index 918878297..ca65ad7bd 100644
--- a/coders/clip.c
+++ b/coders/clip.c
@@ -223,9 +223,9 @@ static MagickBooleanType WriteCLIPImage(const ImageInfo *image_info,
   MagickBooleanType
     status;
 
-  if (image->mask == MagickFalse)
+  if (image->read_mask == MagickFalse)
     (void) ClipImage(image,exception);
-  if (image->mask == MagickFalse)
+  if (image->read_mask == MagickFalse)
     ThrowWriterException(CoderError,"ImageDoesNotHaveAClipMask");
   clip_image=GetImageMask(image,exception);
   if (clip_image == (Image *) NULL)
diff --git a/coders/mask.c b/coders/mask.c
index 6fcb2e3b8..9153dc54f 100644
--- a/coders/mask.c
+++ b/coders/mask.c
@@ -270,7 +270,7 @@ static Image *MaskImage(const Image *image,ExceptionInfo *exception)
     for (x=0; x < (ssize_t) image->columns; x++)
     {
       SetPixelChannel(mask_image,GrayPixelChannel,0,q);
-      SetPixelChannel(mask_image,GrayPixelChannel,GetPixelMask(image,p),q);
+      SetPixelChannel(mask_image,GrayPixelChannel,GetPixelReadMask(image,p),q);
       p+=GetPixelChannels(image);
       q+=GetPixelChannels(mask_image);
     }
diff --git a/coders/ps3.c b/coders/ps3.c
index c3556de67..30be999c3 100644
--- a/coders/ps3.c
+++ b/coders/ps3.c
@@ -1129,7 +1129,7 @@ static MagickBooleanType WritePS3Image(const ImageInfo *image_info,Image *image,
     /*
       PS clipping path from Photoshop clipping path.
     */
-    if ((image->mask != MagickFalse) ||
+    if ((image->read_mask != MagickFalse) ||
         (LocaleNCompare("8BIM:",image->magick_filename,5) != 0))
       (void) WriteBlobString(image,"/ClipImage {} def\n");
     else
@@ -1205,7 +1205,7 @@ static MagickBooleanType WritePS3Image(const ImageInfo *image_info,Image *image,
     /*
       Photoshop clipping path active?
     */
-    if ((image->mask != MagickFalse) &&
+    if ((image->read_mask != MagickFalse) &&
         (LocaleNCompare("8BIM:",image->magick_filename,5) == 0))
         (void) WriteBlobString(image,"true\n");
       else