/////////////////////////////////////////////////////////////////////////////
-// Name: xpmdecod.cpp
+// Name: src/common/xpmdecod.cpp
// Purpose: wxXPMDecoder
// Author: John Cristy, Vaclav Slavik
// RCS-ID: $Id$
* in this Software without prior written authorization from GROUPE BULL.
*/
-#ifdef __GNUG__
-#pragma implementation "xpmdecod.h"
-#endif
-
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
-# pragma hdrstop
+ #pragma hdrstop
#endif
+#if wxUSE_IMAGE && wxUSE_XPM
+
#ifndef WX_PRECOMP
-# include "wx/defs.h"
+ #include "wx/intl.h"
+ #include "wx/log.h"
+ #include "wx/utils.h"
+ #if wxUSE_STREAMS
+ #include "wx/stream.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/intl.h"
+#include "wx/hashmap.h"
#include <string.h>
+#include <ctype.h>
+
#include "wx/xpmdecod.h"
#if wxUSE_STREAMS
{
unsigned char buf[9];
- stream.Read(buf, 9);
- stream.SeekI(-9, wxFromCurrent);
+ if ( !stream.Read(buf, WXSIZEOF(buf)) )
+ return false;
- return (memcmp(buf, "/* XPM */", 9) == 0);
+ stream.SeekI(-(wxFileOffset)WXSIZEOF(buf), wxFromCurrent);
+
+ return memcmp(buf, "/* XPM */", WXSIZEOF(buf)) == 0;
}
wxImage wxXPMDecoder::ReadFile(wxInputStream& stream)
{
size_t length = stream.GetSize();
- wxCHECK_MSG(length != 0, wxNullImage, wxT("Cannot read XPM from stream of unknown size"));
+ 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;
+ // use a smart buffer to be sure to free memory even when we return on
+ // error
+ wxCharBuffer buffer(length);
- if ( stream.Read(xpm_buffer, length).LastError() != wxSTREAM_NO_ERROR )
- return FALSE;
+ char *xpm_buffer = (char *)buffer.data();
+ if ( stream.Read(xpm_buffer, length).GetLastError() == wxSTREAM_READ_ERROR )
+ return wxNullImage;
+ xpm_buffer[length] = '\0';
/*
* Remove comments from the file:
*/
+ char *p, *q;
for (p = xpm_buffer; *p != '\0'; p++)
{
if ( (*p == '"') || (*p == '\'') )
if ( (*q == '*') && (*(q + 1) == '/') )
break;
}
- strcpy(p, q + 2);
+
+ // memmove allows overlaps (unlike strcpy):
+ size_t cpylen = strlen(q + 2) + 1;
+ memmove(p, q + 2, cpylen);
}
/*
* Remove unquoted characters:
*/
- i = 0;
+ size_t i = 0;
for (p = xpm_buffer; *p != '\0'; p++)
{
if ( *p != '"' )
lines_cnt++;
}
- xpm_lines = new const char*[lines_cnt];
+ if ( !lines_cnt )
+ {
+ // this doesn't really look an XPM image
+ return wxNullImage;
+ }
+
+ 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[lines_cnt] = NULL;
+
/*
* Read the image:
*/
wxImage img = ReadData(xpm_lines);
- delete[] xpm_buffer;
delete[] xpm_lines;
+
return img;
}
#endif // wxUSE_STREAMS
typedef struct
{
- char *name;
+ const char *name;
wxUint32 rgb;
} rgbRecord;
{"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)},
{"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 = (unsigned char)(digit1 - 'a' + 0x0A);
+ else if (digit1 >= 'A')
+ i1 = (unsigned char)(digit1 - 'A' + 0x0A);
+ else
+ i1 = (unsigned char)(digit1 - '0');
+ if (digit2 >= 'a')
+ i2 = (unsigned char)(digit2 - 'a' + 0x0A);
+ else if (digit2 >= 'A')
+ i2 = (unsigned char)(digit2 - 'A' + 0x0A);
+ else
+ i2 = (unsigned char)(digit2 - '0');
+ return (unsigned char)(0x10 * i1 + i2);
+}
static bool GetRGBFromName(const char *inname, bool *isNone,
unsigned char *r, unsigned char*g, unsigned char *b)
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 = wxStrdupA(inname);
// theRGBRecords[] has no names with spaces, and no grey, but a
// lot of gray...
p = name;
while (*p)
{
- *p = tolower(*p);
+ *p = (char)tolower(*p);
p++;
}
grey[2] = 'a';
// check for special 'none' colour:
+ bool found;
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 = (unsigned char)((rgbVal >> 16) & 0xFF);
- *g = (unsigned char)((rgbVal >> 8) & 0xFF);
- *b = (unsigned char)((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);
- return FALSE;
+
+ return found;
}
static const char *ParseColor(const char *data)
return NULL;
}
-class wxXPMColourMapData : public wxObject
+struct wxXPMColourMapData
{
- public:
- unsigned char R,G,B;
+ wxXPMColourMapData() { R = G = B = 0; }
+ unsigned char R,G,B;
};
+WX_DECLARE_STRING_HASH_MAP(wxXPMColourMapData, wxXPMColourMap);
wxImage wxXPMDecoder::ReadData(const char **xpm_data)
{
+ wxCHECK_MSG(xpm_data, wxNullImage, wxT("NULL 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;
- wxXPMColourMapData *clr_data;
- wxHashTable clr_tbl(wxKEY_STRING);
+ wxXPMColourMap clr_tbl;
+ wxXPMColourMap::iterator it;
+ wxString maskKey;
/*
* Read hints and initialize structures:
*/
+
count = sscanf(xpm_data[0], "%u %u %u %u",
&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;
}
// 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] = '\0';
- hasMask = FALSE;
- clr_tbl.DeleteContents(TRUE);
+ img.SetMask(false);
+ key[chars_per_pixel] = wxT('\0');
+ hasMask = false;
/*
* Create colour map:
*/
+ wxXPMColourMapData clr_data;
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;
+ 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++)
+ key[i_key] = (wxChar)xmpColLine[i_key];
+ clr_def = ParseColor(xmpColLine + chars_per_pixel);
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' 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;
- 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;
- }
- else
+ wxLogError(_("XPM: malformed colour definition '%s' at line %d!"),
+ xmpColLine, (int)(1 + i));
+ return wxNullImage;
+ }
+
+ if ( isNone )
+ {
+ img.SetMask(true);
+ img.SetMaskColour(255, 0, 255);
+ clr_data.R =
+ clr_data.B = 255;
+ clr_data.G = 0;
+ hasMask = true;
+ maskKey = key;
+ }
+
+ 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)
{
- if ( isNone )
- {
- img.SetMask(TRUE);
- 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;
- }
+ it->second.B = 254;
}
}
- clr_tbl.Put(key, clr_data);
}
/*
*/
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)
{
- 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 )
+ 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++)
+ {
+ key[i_key] = (wxChar)xpmImgLine[chars_per_pixel * i + i_key];
+ }
+
+ entry = clr_tbl.find(key);
+ if ( entry == end )
{
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
{
- 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;
}
}
}
return img;
}
-
#endif // wxUSE_IMAGE && wxUSE_XPM
projects / wxWidgets.git / blobdiff