support mac on little endian systems

[wxWidgets.git] / src / common / gifdecod.cpp

diff --git a/src/common/gifdecod.cpp b/src/common/gifdecod.cpp
index 732557ca3b2d7fa1c623fa8f95a92ae27dcee8d4..ad4395a84968b01d2606dca897d8fcd20606f3a8 100644 (file)
--- a/src/common/gifdecod.cpp
+++ b/src/common/gifdecod.cpp
@@ -271,17 +271,19 @@ bool wxGIFDecoder::GoPrevFrame(bool cyclic)
 
 bool wxGIFDecoder::GoFrame(int which)
 {
 
 bool wxGIFDecoder::GoFrame(int which)
 {

-    int i;
-

     if (!IsAnimation())
         return false;
 
     if ((which >= 1) && (which <= m_nimages))
     {
     if (!IsAnimation())
         return false;
 
     if ((which >= 1) && (which <= m_nimages))
     {

+        m_image = 1;

         m_pimage = m_pfirst;
 
         m_pimage = m_pfirst;
 

-        for (i = 0; i < which; i++)
+        while (m_image < which)
+        {
+            m_image++;

             m_pimage = m_pimage->next;
             m_pimage = m_pimage->next;

+        }

 
         return true;
     }
 
         return true;
     }


@@ -507,7 +509,7 @@ int wxGIFDecoder::dgif(GIFImage *img, int interl, int bits)
                     /* loop until a valid y coordinate has been
                     found, Or if the maximum number of passes has
                     been reached, exit the loop, and stop image
                     /* loop until a valid y coordinate has been
                     found, Or if the maximum number of passes has
                     been reached, exit the loop, and stop image

-                    decoding (At this point the image is succesfully
+                    decoding (At this point the image is successfully

                     decoded).
                     If we don't loop, but merely set y to some other
                     value, that new value might still be invalid depending
                     decoded).
                     If we don't loop, but merely set y to some other
                     value, that new value might still be invalid depending


@@ -621,7 +623,7 @@ bool wxGIFDecoder::CanRead()
     if ( !m_f->Read(buf, WXSIZEOF(buf)) )
         return false;
 
     if ( !m_f->Read(buf, WXSIZEOF(buf)) )
         return false;
 

-    m_f->SeekI(-(off_t)WXSIZEOF(buf), wxFromCurrent);
+    m_f->SeekI(-(wxFileOffset)WXSIZEOF(buf), wxFromCurrent);

 
     return memcmp(buf, "GIF", WXSIZEOF(buf)) == 0;
 }
 
     return memcmp(buf, "GIF", WXSIZEOF(buf)) == 0;
 }


@@ -752,7 +754,7 @@ int wxGIFDecoder::ReadGIF()
                     transparent = buf[4];
 
                 /* read disposal method */
                     transparent = buf[4];
 
                 /* read disposal method */

-                disposal = (buf[1] & 0x1C) - 1;
+                disposal = ((buf[1] & 0x1C) >> 2) - 1;

             }
             else
             /* other extension, skip */
             }
             else
             /* other extension, skip */