Don't use mnemonic for Cancel button under MSW.

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

diff --git a/src/common/imagiff.cpp b/src/common/imagiff.cpp
index 5a6dc5cced6e3343ddec1ae76aa064725dda8d26..3dd0f7f392bcbc4b8701bb627c0fad48c0e29676 100644 (file)
--- a/src/common/imagiff.cpp
+++ b/src/common/imagiff.cpp
@@ -1,5 +1,5 @@
 /////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////

-// Name:        imagiff.h
+// Name:        src/common/imagiff.h

 // Purpose:     wxImage handler for Amiga IFF images
 // Author:      Steffen Gutmann, Thomas Meyer
 // RCS-ID:      $Id$
 // Purpose:     wxImage handler for Amiga IFF images
 // Author:      Steffen Gutmann, Thomas Meyer
 // RCS-ID:      $Id$


@@ -12,27 +12,22 @@
 // by the author of xv, John Bradley for using the iff loading part
 // in wxWidgets has been gratefully given.
 
 // by the author of xv, John Bradley for using the iff loading part
 // in wxWidgets has been gratefully given.
 

-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-#pragma implementation "imagiff.h"
-#endif
-

 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
 #ifdef __BORLANDC__
 // For compilers that support precompilation, includes "wx.h".
 #include "wx/wxprec.h"
 
 #ifdef __BORLANDC__

-#  pragma hdrstop
+    #pragma hdrstop

 #endif
 
 #endif
 

+#if wxUSE_IMAGE && wxUSE_IFF
+

 #ifndef WX_PRECOMP
 #ifndef WX_PRECOMP

-#  include "wx/defs.h"
+    #include "wx/log.h"
+    #include "wx/intl.h"

 #endif
 
 #endif
 

-#if wxUSE_IMAGE && wxUSE_IFF
-

 #include "wx/imagiff.h"
 #include "wx/wfstream.h"
 #include "wx/imagiff.h"
 #include "wx/wfstream.h"

-#include "wx/log.h"
-#include "wx/intl.h"

 
 #if wxUSE_PALETTE
     #include "wx/palette.h"
 
 #if wxUSE_PALETTE
     #include "wx/palette.h"


@@ -103,7 +98,10 @@ public:
     // constructor, destructor, etc.
     wxIFFDecoder(wxInputStream *s);
     ~wxIFFDecoder() { Destroy(); }
     // constructor, destructor, etc.
     wxIFFDecoder(wxInputStream *s);
     ~wxIFFDecoder() { Destroy(); }

+    
+    // NOTE: this function modifies the current stream position

     bool CanRead();
     bool CanRead();

+    

     int ReadIFF();
     bool ConvertToImage(wxImage *image) const;
 };
     int ReadIFF();
     bool ConvertToImage(wxImage *image) const;
 };


@@ -239,8 +237,6 @@ bool wxIFFDecoder::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);
-

     return (memcmp(buf, "FORM", 4) == 0) && (memcmp(buf+8, "ILBM", 4) == 0);
 }
 
     return (memcmp(buf, "FORM", 4) == 0) && (memcmp(buf+8, "ILBM", 4) == 0);
 }
 


@@ -253,13 +249,13 @@ typedef unsigned char byte;
 #define IFFDEBUG 0
 
 /*************************************************************************
 #define IFFDEBUG 0
 
 /*************************************************************************

-  void decomprle(source, destination, source length, buffer size)
+void decomprle(source, destination, source length, buffer size)

 
 

-  Decompress run-length encoded data from source to destination. Terminates
-  when source is decoded completely or destination buffer is full.
+Decompress run-length encoded data from source to destination. Terminates
+when source is decoded completely or destination buffer is full.

 
 

-  The decruncher is as optimized as I could make it, without risking
-  safety in case of corrupt BODY chunks.
+The decruncher is as optimized as I could make it, without risking
+safety in case of corrupt BODY chunks.

 **************************************************************************/
 
 static void decomprle(const byte *sptr, byte *dptr, long slen, long dlen)
 **************************************************************************/
 
 static void decomprle(const byte *sptr, byte *dptr, long slen, long dlen)


@@ -334,20 +330,27 @@ int wxIFFDecoder::ReadIFF()
 
     m_image = new IFFImage();
     if (m_image == 0) {
 
     m_image = new IFFImage();
     if (m_image == 0) {

-    Destroy();
-    return wxIFF_MEMERR;
+        Destroy();
+        return wxIFF_MEMERR;

     }
 
     // compute file length
     }
 
     // compute file length

-    off_t currentPos = m_f->TellI();
-    m_f->SeekI(0, wxFromEnd);
+    wxFileOffset currentPos = m_f->TellI();
+    if (m_f->SeekI(0, wxFromEnd) == wxInvalidOffset) {
+        Destroy();
+        return wxIFF_MEMERR;
+    }
+

     long filesize = m_f->TellI();
     long filesize = m_f->TellI();

-    m_f->SeekI(currentPos, wxFromStart);
+    if (m_f->SeekI(currentPos, wxFromStart) == wxInvalidOffset) {
+        Destroy();
+        return wxIFF_MEMERR;
+    }

 
     // allocate memory for complete file
     if ((databuf = new byte[filesize]) == 0) {
 
     // allocate memory for complete file
     if ((databuf = new byte[filesize]) == 0) {

-    Destroy();
-    return wxIFF_MEMERR;
+        Destroy();
+        return wxIFF_MEMERR;

     }
 
     m_f->Read(databuf, filesize);
     }
 
     m_f->Read(databuf, filesize);


@@ -358,25 +361,25 @@ int wxIFFDecoder::ReadIFF()
 
     // check for minmal size
     if (dataptr + 12 > dataend) {
 
     // check for minmal size
     if (dataptr + 12 > dataend) {

-    Destroy();
-    return wxIFF_INVFORMAT;
+        Destroy();
+        return wxIFF_INVFORMAT;

     }
 
     // check if we really got an IFF file
     if (strncmp((char *)dataptr, "FORM", 4) != 0) {
     }
 
     // check if we really got an IFF file
     if (strncmp((char *)dataptr, "FORM", 4) != 0) {

-    Destroy();
-    return wxIFF_INVFORMAT;
+        Destroy();
+        return wxIFF_INVFORMAT;

     }
 
     dataptr = dataptr + 8;                  // skip ID and length of FORM
 
     // check if the IFF file is an ILBM (picture) file
     if (strncmp((char *) dataptr, "ILBM", 4) != 0) {
     }
 
     dataptr = dataptr + 8;                  // skip ID and length of FORM
 
     // check if the IFF file is an ILBM (picture) file
     if (strncmp((char *) dataptr, "ILBM", 4) != 0) {

-    Destroy();
-    return wxIFF_INVFORMAT;
+        Destroy();
+        return wxIFF_INVFORMAT;

     }
 
     }
 

-    wxLogTrace(_T("iff"), _T("IFF ILBM file recognized"));
+    wxLogTrace(wxT("iff"), wxT("IFF ILBM file recognized"));

 
     dataptr = dataptr + 4;                                // skip ID
 
 
     dataptr = dataptr + 4;                                // skip ID
 


@@ -384,23 +387,16 @@ int wxIFFDecoder::ReadIFF()
     // main decoding loop. searches IFF chunks and handles them.
     // terminates when BODY chunk was found or dataptr ran over end of file
     //
     // main decoding loop. searches IFF chunks and handles them.
     // terminates when BODY chunk was found or dataptr ran over end of file
     //

-    bool BMHDok = false, CMAPok = false, CAMGok = false;
+    bool BMHDok = false, CAMGok = false;

     int bmhd_width = 0, bmhd_height = 0, bmhd_bitplanes = 0, bmhd_transcol = -1;
     int bmhd_width = 0, bmhd_height = 0, bmhd_bitplanes = 0, bmhd_transcol = -1;

-    byte bmhd_masking = 0, bmhd_compression = 0;
+    byte bmhd_compression = 0;

     long camg_viewmode = 0;
     int colors = 0;
     while (dataptr + 8 <= dataend) {
     // get chunk length and make even
     long camg_viewmode = 0;
     int colors = 0;
     while (dataptr + 8 <= dataend) {
     // get chunk length and make even

-    size_t chunkLen = (iff_getlong(dataptr + 4) + 1) & 0xfffffffe;
-#ifdef __VMS
-       // Silence compiler warning
-       int chunkLen_;
-       chunkLen_ = chunkLen;
-       if (chunkLen_ < 0) {     // format error?
-#else
-       if (chunkLen < 0) {     // format error?
-#endif
-         break;
+    long chunkLen = (iff_getlong(dataptr + 4) + 1) & 0xfffffffe;
+    if (chunkLen < 0) {     // format error?
+        break;

     }
     bool truncated = (dataptr + 8 + chunkLen > dataend);
 
     }
     bool truncated = (dataptr + 8 + chunkLen > dataend);
 


@@ -411,7 +407,7 @@ int wxIFFDecoder::ReadIFF()
         bmhd_width = iff_getword(dataptr + 8);      // width of picture
         bmhd_height= iff_getword(dataptr + 8 + 2);  // height of picture
         bmhd_bitplanes = *(dataptr + 8 + 8);        // # of bitplanes
         bmhd_width = iff_getword(dataptr + 8);      // width of picture
         bmhd_height= iff_getword(dataptr + 8 + 2);  // height of picture
         bmhd_bitplanes = *(dataptr + 8 + 8);        // # of bitplanes

-        bmhd_masking  = *(dataptr + 8 + 9);
+        // bmhd_masking  = *(dataptr + 8 + 9); -- unused currently

         bmhd_compression = *(dataptr + 8 + 10);     // get compression
         bmhd_transcol    = iff_getword(dataptr + 8 + 12);
         BMHDok = true;                              // got BMHD
         bmhd_compression = *(dataptr + 8 + 10);     // get compression
         bmhd_transcol    = iff_getword(dataptr + 8 + 12);
         BMHDok = true;                              // got BMHD


@@ -442,10 +438,9 @@ int wxIFFDecoder::ReadIFF()
         }
         }
 
         }
         }
 

-        wxLogTrace(_T("iff"), _T("Read %d colors from IFF file."),
+        wxLogTrace(wxT("iff"), wxT("Read %d colors from IFF file."),

             colors);
 
             colors);
 

-        CMAPok = true;                              // got CMAP

         dataptr += 8 + chunkLen;                    // to next chunk
     } else if (strncmp((char *)dataptr, "CAMG", 4) == 0) { // CAMG ?
         if (chunkLen < 4 || truncated) {
         dataptr += 8 + chunkLen;                    // to next chunk
     } else if (strncmp((char *)dataptr, "CAMG", 4) == 0) { // CAMG ?
         if (chunkLen < 4 || truncated) {


@@ -506,8 +501,8 @@ int wxIFFDecoder::ReadIFF()
         }
         }
 
         }
         }
 

-        wxLogTrace(_T("iff"),
-            _T("LoadIFF: %s %dx%d, planes=%d (%d cols), comp=%d"),
+        wxLogTrace(wxT("iff"),
+            wxT("LoadIFF: %s %dx%d, planes=%d (%d cols), comp=%d"),

             (fmt==ILBM_NORMAL) ? "Normal ILBM" :
             (fmt==ILBM_HAM)    ? "HAM ILBM" :
             (fmt==ILBM_HAM8)   ? "HAM8 ILBM" :
             (fmt==ILBM_NORMAL) ? "Normal ILBM" :
             (fmt==ILBM_HAM)    ? "HAM ILBM" :
             (fmt==ILBM_HAM8)   ? "HAM8 ILBM" :


@@ -517,8 +512,8 @@ int wxIFFDecoder::ReadIFF()
             1<<bmhd_bitplanes, bmhd_compression);
 
         if ((fmt==ILBM_NORMAL) || (fmt==ILBM_EHB) || (fmt==ILBM_HAM)) {
             1<<bmhd_bitplanes, bmhd_compression);
 
         if ((fmt==ILBM_NORMAL) || (fmt==ILBM_EHB) || (fmt==ILBM_HAM)) {

-        wxLogTrace(_T("iff"),
-            _T("Converting CMAP from normal ILBM CMAP"));
+        wxLogTrace(wxT("iff"),
+            wxT("Converting CMAP from normal ILBM CMAP"));

 
         switch(fmt) {
             case ILBM_NORMAL: colors = 1 << bmhd_bitplanes; break;
 
         switch(fmt) {
             case ILBM_NORMAL: colors = 1 << bmhd_bitplanes; break;


@@ -599,36 +594,36 @@ int wxIFFDecoder::ReadIFF()
                 int c = (col & 0x0f);
                 switch (col & 0x30) {
                 case 0x00: if (c >= 0 && c < colors) {
                 int c = (col & 0x0f);
                 switch (col & 0x30) {
                 case 0x00: if (c >= 0 && c < colors) {

-                           rval = pal[3*c + 0];
-                           gval = pal[3*c + 1];
-                           bval = pal[3*c + 2];
-                       }
-                       break;
+                        rval = pal[3*c + 0];
+                        gval = pal[3*c + 1];
+                        bval = pal[3*c + 2];
+                    }
+                    break;

 
                 case 0x10: bval = c * 17;
 
                 case 0x10: bval = c * 17;

-                       break;
+                    break;

 
                 case 0x20: rval = c * 17;
 
                 case 0x20: rval = c * 17;

-                       break;
+                    break;

 
                 case 0x30: gval = c * 17;
 
                 case 0x30: gval = c * 17;

-                       break;
+                    break;

                 }
             } else if (fmt == ILBM_HAM8) {
                 int c = (col & 0x3f);
                 switch(col & 0xc0) {
                 case 0x00: if (c >= 0 && c < colors) {
                 }
             } else if (fmt == ILBM_HAM8) {
                 int c = (col & 0x3f);
                 switch(col & 0xc0) {
                 case 0x00: if (c >= 0 && c < colors) {

-                           rval = pal[3*c + 0];
-                           gval = pal[3*c + 1];
-                           bval = pal[3*c + 2];
-                       }
-                       break;
+                        rval = pal[3*c + 0];
+                        gval = pal[3*c + 1];
+                        bval = pal[3*c + 2];
+                    }
+                    break;

 
                 case 0x40: bval = (bval & 3) | (c << 2);
 
                 case 0x40: bval = (bval & 3) | (c << 2);

-                       break;
+                    break;

 
                 case 0x80: rval = (rval & 3) | (c << 2);
 
                 case 0x80: rval = (rval & 3) | (c << 2);

-                       break;
+                    break;

 
                 case 0xc0: gval = (rval & 3) | (c << 2);
                 }
 
                 case 0xc0: gval = (rval & 3) | (c << 2);
                 }


@@ -652,7 +647,7 @@ int wxIFFDecoder::ReadIFF()
         }
         }  else if ((fmt == ILBM_NORMAL) || (fmt == ILBM_EHB)) {
         if (fmt == ILBM_EHB) {
         }
         }  else if ((fmt == ILBM_NORMAL) || (fmt == ILBM_EHB)) {
         if (fmt == ILBM_EHB) {

-            wxLogTrace(_T("iff"), _T("Doubling CMAP for EHB mode"));
+            wxLogTrace(wxT("iff"), wxT("Doubling CMAP for EHB mode"));

 
             for (int i=0; i<32; i++) {
             pal[3*(i + 32) + 0] = pal[3*i + 0] >> 1;
 
             for (int i=0; i<32; i++) {
             pal[3*(i + 32) + 0] = pal[3*i + 0] >> 1;


@@ -709,12 +704,12 @@ int wxIFFDecoder::ReadIFF()
         m_image->h = height;
         m_image->transparent = bmhd_transcol;
 
         m_image->h = height;
         m_image->transparent = bmhd_transcol;
 

-        wxLogTrace(_T("iff"), _T("Loaded IFF picture %s"),
+        wxLogTrace(wxT("iff"), wxT("Loaded IFF picture %s"),

             truncated? "truncated" : "completely");
 
         return (truncated? wxIFF_TRUNCATED : wxIFF_OK);
     } else {
             truncated? "truncated" : "completely");
 
         return (truncated? wxIFF_TRUNCATED : wxIFF_OK);
     } else {

-        wxLogTrace(_T("iff"), _T("Skipping unknown chunk '%c%c%c%c'"),
+        wxLogTrace(wxT("iff"), wxT("Skipping unknown chunk '%c%c%c%c'"),

                 *dataptr, *(dataptr+1), *(dataptr+2), *(dataptr+3));
 
         dataptr = dataptr + 8 + chunkLen;      // skip unknown chunk
                 *dataptr, *(dataptr+1), *(dataptr+2), *(dataptr+3));
 
         dataptr = dataptr + 8 + chunkLen;      // skip unknown chunk


@@ -782,7 +777,9 @@ bool wxIFFHandler::SaveFile(wxImage * WXUNUSED(image),
                             wxOutputStream& WXUNUSED(stream), bool verbose)
 {
     if (verbose)
                             wxOutputStream& WXUNUSED(stream), bool verbose)
 {
     if (verbose)

+    {

         wxLogDebug(wxT("IFF: the handler is read-only!!"));
         wxLogDebug(wxT("IFF: the handler is read-only!!"));

+    }

 
     return false;
 }
 
     return false;
 }


@@ -792,6 +789,7 @@ bool wxIFFHandler::DoCanRead(wxInputStream& stream)
     wxIFFDecoder decod(&stream);
 
     return decod.CanRead();
     wxIFFDecoder decod(&stream);
 
     return decod.CanRead();

+         // it's ok to modify the stream position here

 }
 
 #endif // wxUSE_STREAMS
 }
 
 #endif // wxUSE_STREAMS