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

diff --git a/src/common/xpmdecod.cpp b/src/common/xpmdecod.cpp
index 68a56d178855738c4826c08519c8b237cb5455ae..cc0e2bad48366147fd31b9f99f46dd9b64e392c3 100644 (file)
--- a/src/common/xpmdecod.cpp
+++ b/src/common/xpmdecod.cpp
@@ -90,7 +90,7 @@ license is as follows:
  * in this Software without prior written authorization from GROUPE BULL.
  */
 
  * in this Software without prior written authorization from GROUPE BULL.
  */
 

-#ifdef __GNUG__
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)

 #pragma implementation "xpmdecod.h"
 #endif
 
 #pragma implementation "xpmdecod.h"
 #endif
 


@@ -111,9 +111,12 @@ license is as follows:
 #include "wx/image.h"
 #include "wx/utils.h"
 #include "wx/log.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 "wx/intl.h"
 #include <string.h>
 

+#include <ctype.h>
+

 #include "wx/xpmdecod.h"
 
 #if wxUSE_STREAMS
 #include "wx/xpmdecod.h"
 
 #if wxUSE_STREAMS


@@ -121,27 +124,33 @@ bool wxXPMDecoder::CanRead(wxInputStream& stream)
 {
     unsigned char buf[9];
 
 {
     unsigned char buf[9];
 

-    stream.Read(buf, 9);
-    stream.SeekI(-9, wxFromCurrent);
+    if ( !stream.Read(buf, WXSIZEOF(buf)) )
+        return false;
+
+    stream.SeekI(-(off_t)WXSIZEOF(buf), wxFromCurrent);

 
 

-    return (memcmp(buf, "/* XPM */", 9) == 0);
+    return memcmp(buf, "/* XPM */", WXSIZEOF(buf)) == 0;

 }
 
 wxImage wxXPMDecoder::ReadFile(wxInputStream& stream)
 {
     size_t length = stream.GetSize();
 }
 
 wxImage wxXPMDecoder::ReadFile(wxInputStream& stream)
 {
     size_t length = stream.GetSize();

-    wxCHECK_MSG(length != 0, wxNullImage, wxT("Cannot read XPM from stream of unknown size"));
-    
-    char *xpm_buffer = new char[length];
-    char *p, *q;
-    size_t i;
+    wxCHECK_MSG( length != 0, wxNullImage,
+                 wxT("Cannot read XPM from stream of unknown size") );
+
+    // use a smart buffer to be sure to free memory even when we return on
+    // error
+    wxCharBuffer buffer(length);
+
+    char *xpm_buffer = (char *)buffer.data();
+    if ( stream.Read(xpm_buffer, length).GetLastError() == wxSTREAM_READ_ERROR )
+        return wxNullImage;
+    xpm_buffer[length] = '\0';

 
 

-    if ( stream.Read(xpm_buffer, length).LastError() != wxSTREAM_NO_ERROR )
-        return FALSE;
-        

     /*
      *  Remove comments from the file:
      */
     /*
      *  Remove comments from the file:
      */

+    char *p, *q;

     for (p = xpm_buffer; *p != '\0'; p++)
     {
         if ( (*p == '"') || (*p == '\'') )
     for (p = xpm_buffer; *p != '\0'; p++)
     {
         if ( (*p == '"') || (*p == '\'') )


@@ -175,10 +184,10 @@ wxImage wxXPMDecoder::ReadFile(wxInputStream& stream)
     /*
      *  Remove unquoted characters:
      */
     /*
      *  Remove unquoted characters:
      */

-    i = 0;
+    size_t i = 0;

     for (p = xpm_buffer; *p != '\0'; p++)
     {
     for (p = xpm_buffer; *p != '\0'; p++)
     {

-        if ( *p != '"' ) 
+        if ( *p != '"' )

             continue;
         for (q = p + 1; *q != '\0'; q++)
             if (*q == '"')
             continue;
         for (q = p + 1; *q != '\0'; q++)
             if (*q == '"')


@@ -189,40 +198,50 @@ wxImage wxXPMDecoder::ReadFile(wxInputStream& stream)
         p = q + 1;
     }
     xpm_buffer[i] = '\0';
         p = q + 1;
     }
     xpm_buffer[i] = '\0';

-    
+

     /*
      *  Create array of lines and convert \n's to \0's:
      */
     const char **xpm_lines;
     size_t lines_cnt = 0;
     size_t line;
     /*
      *  Create array of lines and convert \n's to \0's:
      */
     const char **xpm_lines;
     size_t lines_cnt = 0;
     size_t line;

-    
+

     for (p = xpm_buffer; *p != '\0'; p++)
     {
     for (p = xpm_buffer; *p != '\0'; p++)
     {

-        if ( *p == '\n' ) 
+        if ( *p == '\n' )

             lines_cnt++;
     }
             lines_cnt++;
     }

-    
+
+    if ( !lines_cnt )
+    {
+        // this doesn't really look an XPM image
+        return wxNullImage;
+    }
+

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

-        if ( *p == '\n' ) 
+        if ( *p == '\n' )

         {
             xpm_lines[line] = p + 1;
             *p = '\0';
             line++;
         }
     }
         {
             xpm_lines[line] = p + 1;
             *p = '\0';
             line++;
         }
     }

-    
+

     /*
      *  Read the image:
      */
     wxImage img = ReadData(xpm_lines);
     /*
      *  Read the image:
      */
     wxImage img = ReadData(xpm_lines);

-    
-    delete[] xpm_buffer;
+
+#ifdef __WIN16__
+    delete[] (char**) xpm_lines;
+#else

     delete[] xpm_lines;
     delete[] xpm_lines;

+#endif
+

     return img;
 }
 #endif // wxUSE_STREAMS
     return img;
 }
 #endif // wxUSE_STREAMS


@@ -243,9 +262,9 @@ wxImage wxXPMDecoder::ReadFile(wxInputStream& stream)
 \*****************************************************************************/
 
 
 \*****************************************************************************/
 
 

-typedef struct 
+typedef struct

 {
 {

-    char *name;
+    const char *name;

     wxUint32 rgb;
 } rgbRecord;
 
     wxUint32 rgb;
 } rgbRecord;
 


@@ -469,6 +488,7 @@ static rgbRecord theRGBRecords[] =
     {"seagreen", myRGB(82, 149, 132)},
     {"seashell", myRGB(255, 245, 238)},
     {"sienna", myRGB(150, 82, 45)},
     {"seagreen", myRGB(82, 149, 132)},
     {"seashell", myRGB(255, 245, 238)},
     {"sienna", myRGB(150, 82, 45)},

+    {"silver", myRGB(192, 192, 192)},

     {"skyblue", myRGB(114, 159, 255)},
     {"slateblue", myRGB(126, 136, 171)},
     {"slategray", myRGB(112, 128, 144)},
     {"skyblue", myRGB(114, 159, 255)},
     {"slateblue", myRGB(126, 136, 171)},
     {"slategray", myRGB(112, 128, 144)},


@@ -489,7 +509,26 @@ static rgbRecord theRGBRecords[] =
     {"yellowgreen", myRGB(50, 216, 56)},
     {NULL, myRGB(0, 0, 0)}
 };
     {"yellowgreen", myRGB(50, 216, 56)},
     {NULL, myRGB(0, 0, 0)}
 };

-static int numTheRGBRecords = 234;
+static int numTheRGBRecords = 235;
+
+static unsigned char ParseHexadecimal(char digit1, char digit2)
+{
+    unsigned char i1, i2;
+
+    if (digit1 >= 'a')
+        i1 = digit1 - 'a' + 0x0A;
+    else if (digit1 >= 'A')
+        i1 = digit1 - 'A' + 0x0A;
+    else
+        i1 = digit1 - '0';
+    if (digit2 >= 'a')
+        i2 = digit2 - 'a' + 0x0A;
+    else if (digit2 >= 'A')
+        i2 = digit2 - 'A' + 0x0A;
+    else
+        i2 = digit2 - '0';
+    return (0x10 * i1 + i2);
+}

 
 static bool GetRGBFromName(const char *inname, bool *isNone,
                            unsigned char *r, unsigned char*g, unsigned char *b)
 
 static bool GetRGBFromName(const char *inname, bool *isNone,
                            unsigned char *r, unsigned char*g, unsigned char *b)


@@ -500,20 +539,16 @@ static bool GetRGBFromName(const char *inname, bool *isNone,
     char *name;
     char *grey, *p;
 
     char *name;
     char *grey, *p;
 

-    // #rrggbb are not in database, we parse them directly
-    if ( *inname == '#' && strlen(inname) == 7 )
+    // Neither #rrggbb nor #rrrrggggbbbb are in database, we parse them directly
+    size_t inname_len = strlen(inname);
+    if ( *inname == '#' && (inname_len == 7 || inname_len == 13))

     {
     {

-        char buf[3];
-        buf[2] = 0;
-        buf[0] = inname[1]; buf[1] = inname[2];
-        *r = (unsigned char) wxHexToDec(buf);
-        buf[0] = inname[3]; buf[1] = inname[4];
-        *g = (unsigned char) wxHexToDec(buf);
-        buf[0] = inname[5]; buf[1] = inname[6];
-        *b = (unsigned char) wxHexToDec(buf);
-        *isNone = FALSE;
-        
-        return TRUE;
+        size_t ofs = (inname_len == 7) ? 2 : 4;
+        *r = ParseHexadecimal(inname[1], inname[2]);
+        *g = ParseHexadecimal(inname[1*ofs+1], inname[1*ofs+2]);
+        *b = ParseHexadecimal(inname[2*ofs+1], inname[2*ofs+2]);
+        *isNone = false;
+        return true;

     }
 
     name = strdup(inname);
     }
 
     name = strdup(inname);


@@ -522,7 +557,7 @@ static bool GetRGBFromName(const char *inname, bool *isNone,
     // lot of gray...
 
     // so first extract ' '
     // lot of gray...
 
     // so first extract ' '

-    while ((p = strchr(name, ' '))) 
+    while ((p = strchr(name, ' ')) != NULL)

     {
         while (*(p))            // till eof of string
         {
     {
         while (*(p))            // till eof of string
         {


@@ -532,7 +567,7 @@ static bool GetRGBFromName(const char *inname, bool *isNone,
     }
     // fold to lower case
     p = name;
     }
     // fold to lower case
     p = name;

-    while (*p) 
+    while (*p)

     {
         *p = tolower(*p);
         p++;
     {
         *p = tolower(*p);
         p++;


@@ -540,50 +575,56 @@ static bool GetRGBFromName(const char *inname, bool *isNone,
 
     // substitute Grey with Gray, else rgbtab.h would have more than 100
     // 'duplicate' entries
 
     // substitute Grey with Gray, else rgbtab.h would have more than 100
     // 'duplicate' entries

-    if ( (grey = strstr(name, "grey")) )
+    if ( (grey = strstr(name, "grey")) != NULL )

         grey[2] = 'a';
 
     // check for special 'none' colour:
         grey[2] = 'a';
 
     // check for special 'none' colour:

+    bool found;

     if ( strcmp(name, "none") == 0 )
     {
     if ( strcmp(name, "none") == 0 )
     {

-        *isNone = TRUE;
-        return TRUE;
+        *isNone = true;
+        found = true;

     }
     }

-
-    // binary search:
-    left = 0;
-    right = numTheRGBRecords - 1;
-    do 
+    else // not "None"

     {
     {

-        middle = (left + right) / 2;
-        cmp = strcmp(name, theRGBRecords[middle].name);
-        if ( cmp == 0 )
-        {
-            rgbVal = theRGBRecords[middle].rgb;
-            *r = (rgbVal >> 16) & 0xFF;
-            *g = (rgbVal >> 8) & 0xFF;
-            *b = (rgbVal) & 0xFF;
-            *isNone = FALSE;
-            free(name);
-            return TRUE;
-        } 
-        else if ( cmp < 0 ) 
+        found = false;
+
+        // binary search:
+        left = 0;
+        right = numTheRGBRecords - 1;
+        do

         {
         {

-            right = middle - 1;
-        } 
-        else 
-        {           // > 0
-            left = middle + 1;
-        }
-    } while (left <= right);
+            middle = (left + right) / 2;
+            cmp = strcmp(name, theRGBRecords[middle].name);
+            if ( cmp == 0 )
+            {
+                rgbVal = theRGBRecords[middle].rgb;
+                *r = (unsigned char)((rgbVal >> 16) & 0xFF);
+                *g = (unsigned char)((rgbVal >> 8) & 0xFF);
+                *b = (unsigned char)((rgbVal) & 0xFF);
+                *isNone = false;
+                found = true;
+                break;
+            }
+            else if ( cmp < 0 )
+            {
+                right = middle - 1;
+            }
+            else // cmp > 0
+            {
+                left = middle + 1;
+            }
+        } while (left <= right);
+    }

 
     free(name);
 
     free(name);

-    return FALSE;
+
+    return found;

 }
 
 static const char *ParseColor(const char *data)
 {
 }
 
 static const char *ParseColor(const char *data)
 {

-    static const char *targets[] = 
+    static const char *targets[] =

                         {"c ", "g ", "g4 ", "m ", "b ", "s ", NULL};
 
     const char *p, *r;
                         {"c ", "g ", "g4 ", "m ", "b ", "s ", NULL};
 
     const char *p, *r;


@@ -613,28 +654,31 @@ static const char *ParseColor(const char *data)
     return NULL;
 }
 
     return NULL;
 }
 

-class wxXPMColourMapData : public wxObject
+struct wxXPMColourMapData

 {
 {

-    public:
-        unsigned char R,G,B;
+    unsigned char R,G,B;

 };
 };

+WX_DECLARE_STRING_HASH_MAP(wxXPMColourMapData, wxXPMColourMap);

 
 wxImage wxXPMDecoder::ReadData(const char **xpm_data)
 {
     wxImage img;
     int count;
     unsigned width, height, colors_cnt, chars_per_pixel;
 
 wxImage wxXPMDecoder::ReadData(const char **xpm_data)
 {
     wxImage img;
     int count;
     unsigned width, height, colors_cnt, chars_per_pixel;

-    unsigned i, j;
-    char key[64];
+    size_t i, j, i_key;
+    wxChar key[64];

     const char *clr_def;
     bool hasMask;
     const char *clr_def;
     bool hasMask;

-    wxXPMColourMapData *clr_data;
-    wxHashTable clr_tbl(wxKEY_STRING);
-    
+    wxXPMColourMapData clr_data;
+    wxXPMColourMap clr_tbl;
+    wxXPMColourMap::iterator it;
+    wxString maskKey;
+

     /*
      *  Read hints and initialize structures:
      */
     /*
      *  Read hints and initialize structures:
      */

-    count = sscanf(xpm_data[0], "%u %u %u %u", 
+     
+    count = sscanf(xpm_data[0], "%u %u %u %u",

                    &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 )
     {


@@ -646,80 +690,103 @@ wxImage wxXPMDecoder::ReadData(const char **xpm_data)
     //     92 possible values on each position, 92^64 is *way* larger space than
     //     8bit RGB...
     wxCHECK_MSG(chars_per_pixel < 64, wxNullImage, wxT("XPM colormaps this large not supported."));
     //     92 possible values on each position, 92^64 is *way* larger space than
     //     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;
 
     img.Create(width, height);
     if ( !img.Ok() ) return img;
 

-    img.SetMask(FALSE);
-    key[chars_per_pixel] = '\0';
-    hasMask = FALSE;
-    clr_tbl.DeleteContents(TRUE);
-    
+    img.SetMask(false);
+    key[chars_per_pixel] = wxT('\0');
+    hasMask = false;
+

     /*
      *  Create colour map:
      */
     for (i = 0; i < colors_cnt; i++)
     {
     /*
      *  Create colour map:
      */
     for (i = 0; i < colors_cnt; i++)
     {

-        memcpy(key, xpm_data[1 + i], chars_per_pixel);
-        clr_def = ParseColor(xpm_data[1 + i]);
-        clr_data = new wxXPMColourMapData;
+        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);

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

-            wxLogError(_("XPM: malformed colour definition '%s'!"), xpm_data[1+i]);
-            clr_data->R = 255, clr_data->G = 0, clr_data->B = 255;
+            wxLogError(_("XPM: malformed colour definition '%s'!"),
+                       xpm_data[1+i]);
+            clr_data.R = 255, clr_data.G = 0, clr_data.B = 255;

         }
         else
         {
             bool isNone;
         }
         else
         {
             bool isNone;

-            if ( !GetRGBFromName(clr_def, &isNone, 
-                                 &clr_data->R, &clr_data->G, &clr_data->B) )
+            if ( !GetRGBFromName(clr_def, &isNone,
+                                 &clr_data.R, &clr_data.G, &clr_data.B) )

             {
             {

-                wxLogError(_("XPM: malformed colour definition '%s'!"), xpm_data[1+i]);
-                clr_data->R = 255, clr_data->G = 0, clr_data->B = 255;
+                wxLogError(_("XPM: malformed colour definition '%s'!"),
+                           xpm_data[1+i]);
+                clr_data.R = 255, clr_data.G = 0, clr_data.B = 255;

             }
             else
             {
                 if ( isNone )
                 {
             }
             else
             {
                 if ( isNone )
                 {

-                    img.SetMask(TRUE);
+                    img.SetMask(true);

                     img.SetMaskColour(255, 0, 255);
                     img.SetMaskColour(255, 0, 255);

-                    hasMask = TRUE;
-                    clr_data->R = 255, clr_data->G = 0, clr_data->B = 255;
-                }
-                else
-                {
-                    if ( hasMask && clr_data->R == 255 && 
-                                    clr_data->G == 0 && clr_data->B == 255 )
-                        clr_data->B = 254;
+                    hasMask = true;
+                    clr_data.R = 255, clr_data.G = 0, clr_data.B = 255;
+                    maskKey = key;

                 }
             }
         }
                 }
             }
         }

-        clr_tbl.Put(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):
+     */
+    if (hasMask)
+    {
+        for (it = clr_tbl.begin(); it != clr_tbl.end(); it++)
+        {
+            if (it->second.R == 255 && it->second.G == 0 &&
+                it->second.B == 255 &&
+                it->first != maskKey)
+            {
+                it->second.B = 254;
+            }
+        }

     }
 
     /*
      *  Parse image data:
      */
     }
 
     /*
      *  Parse image data:
      */

-     
+

     unsigned char *img_data = img.GetData();
     unsigned char *img_data = img.GetData();

+    wxXPMColourMap::iterator entry;
+    wxXPMColourMap::iterator end = clr_tbl.end();
+    

     for (j = 0; j < height; j++)
     {
         for (i = 0; i < width; i++, img_data += 3)
         {
     for (j = 0; j < height; j++)
     {
         for (i = 0; i < width; i++, img_data += 3)
         {

-            memcpy(key, 
-                   xpm_data[1 + colors_cnt + j] + chars_per_pixel * i,
-                   chars_per_pixel);
-            clr_data = (wxXPMColourMapData*) clr_tbl.Get(key);
-            if ( clr_data == NULL )
+            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];
+            entry = clr_tbl.find(key);
+            if ( entry == end )

             {
                 wxLogError(_("XPM: Malformed pixel data!"));
             {
                 wxLogError(_("XPM: Malformed pixel data!"));

+
+                // better return right now as otherwise we risk to flood the
+                // user with error messages as something seems to be seriously
+                // wrong with the file and so we could give this message for
+                // each remaining pixel if we don't bail out
+                return wxNullImage;

             }
             else
             {
             }
             else
             {

-                img_data[0] = clr_data->R;
-                img_data[1] = clr_data->G;
-                img_data[2] = clr_data->B;
+                img_data[0] = entry->second.R;
+                img_data[1] = entry->second.G;
+                img_data[2] = entry->second.B;

             }
         }
     }
             }
         }
     }


@@ -727,5 +794,4 @@ wxImage wxXPMDecoder::ReadData(const char **xpm_data)
     return img;
 }
 
     return img;
 }
 

-

 #endif // wxUSE_IMAGE && wxUSE_XPM
 #endif // wxUSE_IMAGE && wxUSE_XPM