Explain various printing backends in GTK+

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

diff --git a/src/common/xpmdecod.cpp b/src/common/xpmdecod.cpp
index ed784fb578cc9b061c69e8b9fcb3cc5aa6721a7f..b866d751aa5bd0c358a7b12640218a31d11ceeb2 100644 (file)
--- a/src/common/xpmdecod.cpp
+++ b/src/common/xpmdecod.cpp
@@ -1,5 +1,5 @@
 /////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////

-// Name:        xpmdecod.cpp
+// Name:        src/common/xpmdecod.cpp

 // Purpose:     wxXPMDecoder
 // Author:      John Cristy, Vaclav Slavik
 // RCS-ID:      $Id$
 // Purpose:     wxXPMDecoder
 // Author:      John Cristy, Vaclav Slavik
 // RCS-ID:      $Id$


@@ -90,35 +90,29 @@ license is as follows:
  * in this Software without prior written authorization from GROUPE BULL.
  */
 
  * in this Software without prior written authorization from GROUPE BULL.
  */
 

-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-#pragma implementation "xpmdecod.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_XPM
+
+#include "wx/xpmdecod.h"
+

 #ifndef WX_PRECOMP
 #ifndef WX_PRECOMP

-#  include "wx/defs.h"
+    #include "wx/intl.h"
+    #include "wx/log.h"
+    #include "wx/utils.h"
+    #include "wx/hashmap.h"
+    #include "wx/stream.h"
+    #include "wx/image.h"

 #endif
 
 #endif
 

-#if wxUSE_IMAGE && wxUSE_XPM
-
-#include "wx/stream.h"
-#include "wx/image.h"
-#include "wx/utils.h"
-#include "wx/log.h"
-#include "wx/hashmap.h"
-#include "wx/intl.h"

 #include <string.h>
 #include <string.h>

-

 #include <ctype.h>
 
 #include <ctype.h>
 

-#include "wx/xpmdecod.h"
-

 #if wxUSE_STREAMS
 bool wxXPMDecoder::CanRead(wxInputStream& stream)
 {
 #if wxUSE_STREAMS
 bool wxXPMDecoder::CanRead(wxInputStream& stream)
 {


@@ -221,7 +215,7 @@ wxImage wxXPMDecoder::ReadFile(wxInputStream& stream)
         return wxNullImage;
     }
 
         return wxNullImage;
     }
 

-    xpm_lines = new const char*[lines_cnt];
+    xpm_lines = new const char*[lines_cnt + 1];

     xpm_lines[0] = xpm_buffer;
     line = 1;
     for (p = xpm_buffer; (*p != '\0') && (line < lines_cnt); p++)
     xpm_lines[0] = xpm_buffer;
     line = 1;
     for (p = xpm_buffer; (*p != '\0') && (line < lines_cnt); p++)


@@ -234,6 +228,8 @@ wxImage wxXPMDecoder::ReadFile(wxInputStream& stream)
         }
     }
 
         }
     }
 

+    xpm_lines[lines_cnt] = NULL;
+

     /*
      *  Read the image:
      */
     /*
      *  Read the image:
      */


@@ -655,12 +651,15 @@ static const char *ParseColor(const char *data)
 
 struct wxXPMColourMapData
 {
 
 struct wxXPMColourMapData
 {

+    wxXPMColourMapData() { R = G = B = 0; }

     unsigned char R,G,B;
 };
 WX_DECLARE_STRING_HASH_MAP(wxXPMColourMapData, wxXPMColourMap);
 
     unsigned char R,G,B;
 };
 WX_DECLARE_STRING_HASH_MAP(wxXPMColourMapData, wxXPMColourMap);
 

-wxImage wxXPMDecoder::ReadData(const char **xpm_data)
+wxImage wxXPMDecoder::ReadData(const char* const* xpm_data)

 {
 {

+    wxCHECK_MSG(xpm_data, wxNullImage, wxT("NULL XPM data") );
+

     wxImage img;
     int count;
     unsigned width, height, colors_cnt, chars_per_pixel;
     wxImage img;
     int count;
     unsigned width, height, colors_cnt, chars_per_pixel;


@@ -680,7 +679,7 @@ wxImage wxXPMDecoder::ReadData(const char **xpm_data)
                    &width, &height, &colors_cnt, &chars_per_pixel);
     if ( count != 4 || width * height * colors_cnt == 0 )
     {
                    &width, &height, &colors_cnt, &chars_per_pixel);
     if ( count != 4 || width * height * colors_cnt == 0 )
     {

-        wxLogError(_T("XPM: Not XPM data!"));
+        wxLogError(_("XPM: incorrect header format!"));

         return wxNullImage;
     }
 
         return wxNullImage;
     }
 


@@ -689,8 +688,8 @@ wxImage wxXPMDecoder::ReadData(const char **xpm_data)
     //     8bit RGB...
     wxCHECK_MSG(chars_per_pixel < 64, wxNullImage, wxT("XPM colormaps this large not supported."));
 
     //     8bit RGB...
     wxCHECK_MSG(chars_per_pixel < 64, wxNullImage, wxT("XPM colormaps this large not supported."));
 

-    img.Create(width, height);
-    if ( !img.Ok() ) return img;
+    if ( !img.Create(width, height) )
+        return wxNullImage;

 
     img.SetMask(false);
     key[chars_per_pixel] = wxT('\0');
 
     img.SetMask(false);
     key[chars_per_pixel] = wxT('\0');


@@ -699,58 +698,65 @@ wxImage wxXPMDecoder::ReadData(const char **xpm_data)
     /*
      *  Create colour map:
      */
     /*
      *  Create colour map:
      */

+    wxXPMColourMapData clr_data;

     for (i = 0; i < colors_cnt; i++)
     {
     for (i = 0; i < colors_cnt; i++)
     {

-        wxXPMColourMapData clr_data = {255,0,255};
+        const char *xmpColLine = xpm_data[1 + i];
+
+        // we must have at least " x y" after the colour index, hence +5
+        if ( !xmpColLine || strlen(xmpColLine) < chars_per_pixel + 5 )
+        {
+            wxLogError(_("XPM: incorrect colour description in line %d"),
+                       (int)(1 + i));
+            return wxNullImage;
+        }

 
         for (i_key = 0; i_key < chars_per_pixel; i_key++)
 
         for (i_key = 0; i_key < chars_per_pixel; i_key++)

-            key[i_key] = (wxChar)xpm_data[1 + i][i_key];
-        clr_def = ParseColor(xpm_data[1 + i] + chars_per_pixel);
+            key[i_key] = (wxChar)xmpColLine[i_key];
+        clr_def = ParseColor(xmpColLine + chars_per_pixel);

 
         if ( clr_def == NULL )
         {
 
         if ( clr_def == NULL )
         {

-            wxLogError(_("XPM: malformed colour definition '%s'!"),
-                       xpm_data[1+i]);
+            wxLogError(_("XPM: malformed colour definition '%s' at line %d!"),
+                       xmpColLine, (int)(1 + i));
+            return wxNullImage;

         }
         }

-        else
+
+        bool isNone = false;
+        if ( !GetRGBFromName(clr_def, &isNone,
+                             &clr_data.R, &clr_data.G, &clr_data.B) )

         {
         {

-            bool isNone = false;
-            if ( !GetRGBFromName(clr_def, &isNone,
-                                 &clr_data.R, &clr_data.G, &clr_data.B) )
-            {
-                wxLogError(_("XPM: malformed colour definition '%s'!"),
-                           xpm_data[1+i]);
-            }
-            else
-            {
-                if ( isNone )
-                {
-                    img.SetMask(true);
-                    img.SetMaskColour(255, 0, 255);
-                    hasMask = true;
-                    maskKey = key;
-                }
-            }
+            wxLogError(_("XPM: malformed colour definition '%s' at line %d!"),
+                       xmpColLine, (int)(1 + i));
+            return wxNullImage;
+        }
+
+        if ( isNone )
+        {
+            hasMask = true;
+            maskKey = key;

         }
         }

+

         clr_tbl[key] = clr_data;
     }
 
         clr_tbl[key] = clr_data;
     }
 

-    /*
-     *  Modify colour entries with RGB = (255,0,255) to (255,0,254) if
-     *  mask colour is present (so that existing pixels with (255,0,255)
-     *  magenta colour are not incorrectly made transparent):
-     */
+    // deal with the mask: we must replace pseudo-colour "None" with the mask
+    // colour (which can be any colour not otherwise used in the image)

     if (hasMask)
     {
     if (hasMask)
     {

-        for (it = clr_tbl.begin(); it != clr_tbl.end(); it++)
+        unsigned char r, g, b;
+        if ( !img.FindFirstUnusedColour(&r, &g, &b) )

         {
         {

-            if (it->second.R == 255 && it->second.G == 0 &&
-                it->second.B == 255 &&
-                it->first != maskKey)
-            {
-                it->second.B = 254;
-            }
+            wxLogError(_("XPM: no colors left to use for mask!"));
+            return wxNullImage;

         }
         }

+
+        clr_tbl[maskKey].R = r;
+        clr_tbl[maskKey].G = g;
+        clr_tbl[maskKey].B = b;
+
+        img.SetMask(true);
+        img.SetMaskColour(r, g, b);

     }
 
     /*
     }
 
     /*


@@ -765,9 +771,19 @@ wxImage wxXPMDecoder::ReadData(const char **xpm_data)
     {
         for (i = 0; i < width; i++, img_data += 3)
         {
     {
         for (i = 0; i < width; i++, img_data += 3)
         {

+            const char *xpmImgLine = xpm_data[1 + colors_cnt + j];
+            if ( !xpmImgLine || strlen(xpmImgLine) < width*chars_per_pixel )
+            {
+                wxLogError(_("XPM: truncated image data at line %d!"),
+                           (int)(1 + colors_cnt + j));
+                return wxNullImage;
+            }
+

             for (i_key = 0; i_key < chars_per_pixel; i_key++)
             for (i_key = 0; i_key < chars_per_pixel; i_key++)

-                key[i_key] = (wxChar)xpm_data[1 + colors_cnt + j]
-                                             [chars_per_pixel * i + i_key];
+            {
+                key[i_key] = (wxChar)xpmImgLine[chars_per_pixel * i + i_key];
+            }
+

             entry = clr_tbl.find(key);
             if ( entry == end )
             {
             entry = clr_tbl.find(key);
             if ( entry == end )
             {