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path: root/plugins/AdvaImg/src/FreeImage/PluginXPM.cpp
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-rw-r--r--plugins/AdvaImg/src/FreeImage/PluginXPM.cpp487
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diff --git a/plugins/AdvaImg/src/FreeImage/PluginXPM.cpp b/plugins/AdvaImg/src/FreeImage/PluginXPM.cpp
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+// ==========================================================
+// XPM Loader and Writer
+//
+// Design and implementation by
+// - Ryan Rubley (ryan@lostreality.org)
+//
+// COVERED CODE IS PROVIDED UNDER THIS LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTY
+// OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, WARRANTIES
+// THAT THE COVERED CODE IS FREE OF DEFECTS, MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE
+// OR NON-INFRINGING. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE COVERED
+// CODE IS WITH YOU. SHOULD ANY COVERED CODE PROVE DEFECTIVE IN ANY RESPECT, YOU (NOT
+// THE INITIAL DEVELOPER OR ANY OTHER CONTRIBUTOR) ASSUME THE COST OF ANY NECESSARY
+// SERVICING, REPAIR OR CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL
+// PART OF THIS LICENSE. NO USE OF ANY COVERED CODE IS AUTHORIZED HEREUNDER EXCEPT UNDER
+// THIS DISCLAIMER.
+//
+// Use at your own risk!
+// ==========================================================
+
+#ifdef _MSC_VER
+#pragma warning (disable : 4786) // identifier was truncated to 'number' characters
+#endif
+
+// IMPLEMENTATION NOTES:
+// ------------------------
+// Initial design and implementation by
+// - Karl-Heinz Bussian (khbussian@moss.de)
+// - Hervé Drolon (drolon@infonie.fr)
+// Completely rewritten from scratch by Ryan Rubley (ryan@lostreality.org)
+// in order to address the following major fixes:
+// * Supports any number of chars per pixel (not just 1 or 2)
+// * Files with 2 chars per pixel but <= 256colors are loaded as 256 color (not 24bit)
+// * Loads much faster, uses much less memory
+// * supports #rgb #rrrgggbbb and #rrrrggggbbbb colors (not just #rrggbb)
+// * supports symbolic color names
+// ==========================================================
+
+#include "FreeImage.h"
+#include "Utilities.h"
+
+// ==========================================================
+// Plugin Interface
+// ==========================================================
+static int s_format_id;
+
+// ==========================================================
+// Internal Functions
+// ==========================================================
+
+// read in and skip all junk until we find a certain char
+static BOOL
+FindChar(FreeImageIO *io, fi_handle handle, BYTE look_for) {
+ BYTE c;
+ io->read_proc(&c, sizeof(BYTE), 1, handle);
+ while(c != look_for) {
+ if ( io->read_proc(&c, sizeof(BYTE), 1, handle) != 1 )
+ return FALSE;
+ }
+ return TRUE;
+}
+
+// find start of string, read data until ending quote found, allocate memory and return a string
+static char *
+ReadString(FreeImageIO *io, fi_handle handle) {
+ if ( !FindChar(io, handle,'"') )
+ return NULL;
+ BYTE c;
+ std::string s;
+ io->read_proc(&c, sizeof(BYTE), 1, handle);
+ while(c != '"') {
+ s += c;
+ if ( io->read_proc(&c, sizeof(BYTE), 1, handle) != 1 )
+ return NULL;
+ }
+ char *cstr = (char *)malloc(s.length()+1);
+ strcpy(cstr,s.c_str());
+ return cstr;
+}
+
+static char *
+Base92(unsigned int num) {
+ static char b92[16]; //enough for more then 64 bits
+ static char digit[] = " .XoO+@#$%&*=-;:>,<1234567890qwertyuipasdfghjklzxcvbnmMNBVCZASDFGHJKLPIUYTREWQ!~^/()_`'][{}|";
+ b92[15] = '\0';
+ int i = 14;
+ do {
+ b92[i--] = digit[num % 92];
+ num /= 92;
+ } while( num && i >= 0 );
+ return b92+i+1;
+}
+
+// ==========================================================
+// Plugin Implementation
+// ==========================================================
+
+static const char * DLL_CALLCONV
+Format() {
+ return "XPM";
+}
+
+static const char * DLL_CALLCONV
+Description() {
+ return "X11 Pixmap Format";
+}
+
+static const char * DLL_CALLCONV
+Extension() {
+ return "xpm";
+}
+
+static const char * DLL_CALLCONV
+RegExpr() {
+ return "^[ \\t]*/\\* XPM \\*/[ \\t]$";
+}
+
+static const char * DLL_CALLCONV
+MimeType() {
+ return "image/x-xpixmap";
+}
+
+static BOOL DLL_CALLCONV
+Validate(FreeImageIO *io, fi_handle handle) {
+ char buffer[256];
+
+ // checks the first 256 characters for the magic string
+ int count = io->read_proc(buffer, 1, 256, handle);
+ if(count <= 9) return FALSE;
+ for(int i = 0; i < (count - 9); i++) {
+ if(strncmp(&buffer[i], "/* XPM */", 9) == 0)
+ return TRUE;
+ }
+ return FALSE;
+}
+
+static BOOL DLL_CALLCONV
+SupportsExportDepth(int depth) {
+ return (
+ (depth == 8) ||
+ (depth == 24)
+ );
+}
+
+static BOOL DLL_CALLCONV
+SupportsExportType(FREE_IMAGE_TYPE type) {
+ return (type == FIT_BITMAP) ? TRUE : FALSE;
+}
+
+static BOOL DLL_CALLCONV
+SupportsNoPixels() {
+ return TRUE;
+}
+
+// ----------------------------------------------------------
+
+static FIBITMAP * DLL_CALLCONV
+Load(FreeImageIO *io, fi_handle handle, int page, int flags, void *data) {
+ char msg[256];
+ FIBITMAP *dib = NULL;
+
+ if (!handle) return NULL;
+
+ try {
+ char *str;
+
+ BOOL header_only = (flags & FIF_LOAD_NOPIXELS) == FIF_LOAD_NOPIXELS;
+
+ //find the starting brace
+ if ( !FindChar(io, handle,'{') )
+ throw "Could not find starting brace";
+
+ //read info string
+ str = ReadString(io, handle);
+ if (!str)
+ throw "Error reading info string";
+
+ int width, height, colors, cpp;
+ if ( sscanf(str, "%d %d %d %d", &width, &height, &colors, &cpp) != 4 ) {
+ free(str);
+ throw "Improperly formed info string";
+ }
+ free(str);
+
+ if (colors > 256) {
+ dib = FreeImage_AllocateHeader(header_only, width, height, 24, FI_RGBA_RED_MASK, FI_RGBA_GREEN_MASK, FI_RGBA_BLUE_MASK);
+ } else {
+ dib = FreeImage_AllocateHeader(header_only, width, height, 8);
+ }
+
+ //build a map of color chars to rgb values
+ std::map<std::string,FILE_RGBA> rawpal; //will store index in Alpha if 8bpp
+ for(int i = 0; i < colors; i++ ) {
+ FILE_RGBA rgba;
+
+ str = ReadString(io, handle);
+ if (!str)
+ throw "Error reading color strings";
+
+ std::string chrs(str,cpp); //create a string for the color chars using the first cpp chars
+ char *keys = str + cpp; //the color keys for these chars start after the first cpp chars
+
+ //translate all the tabs to spaces
+ char *tmp = keys;
+ while( strchr(tmp,'\t') ) {
+ tmp = strchr(tmp,'\t');
+ *tmp++ = ' ';
+ }
+
+ //prefer the color visual
+ if ( strstr(keys," c ") ) {
+ char *clr = strstr(keys," c ") + 3;
+ while( *clr == ' ' ) clr++; //find the start of the hex rgb value
+ if ( *clr == '#' ) {
+ int red = 0, green = 0, blue = 0, n;
+ clr++;
+ //end string at first space, if any found
+ if ( strchr(clr,' ') )
+ *(strchr(clr,' ')) = '\0';
+ //parse hex color, it can be #rgb #rrggbb #rrrgggbbb or #rrrrggggbbbb
+ switch( strlen(clr) ) {
+ case 3: n = sscanf(clr,"%01x%01x%01x",&red,&green,&blue);
+ red |= (red << 4);
+ green |= (green << 4);
+ blue |= (blue << 4);
+ break;
+ case 6: n = sscanf(clr,"%02x%02x%02x",&red,&green,&blue);
+ break;
+ case 9: n = sscanf(clr,"%03x%03x%03x",&red,&green,&blue);
+ red >>= 4;
+ green >>= 4;
+ blue >>= 4;
+ break;
+ case 12: n = sscanf(clr,"%04x%04x%04x",&red,&green,&blue);
+ red >>= 8;
+ green >>= 8;
+ blue >>= 8;
+ break;
+ default:
+ n = 0;
+ break;
+ }
+ if ( n != 3 ) {
+ free(str);
+ throw "Improperly formed hex color value";
+ }
+ rgba.r = (BYTE)red;
+ rgba.g = (BYTE)green;
+ rgba.b = (BYTE)blue;
+ } else if ( !strncmp(clr,"None",4) || !strncmp(clr,"none",4) ) {
+ rgba.r = rgba.g = rgba.b = 0xFF;
+ } else {
+ char *tmp = clr;
+
+ //scan forward for each space, if its " x " or " xx " end the string there
+ //this means its probably some other visual data beyond that point and not
+ //part of the color name. How many named color end with a 1 or 2 character
+ //word? Probably none in our list at least.
+ while( (tmp = strchr(tmp,' ')) != NULL ) {
+ if ( tmp[1] != ' ' ) {
+ if ( (tmp[2] == ' ') || (tmp[2] != ' ' && tmp[3] == ' ') ) {
+ tmp[0] = '\0';
+ break;
+ }
+ }
+ tmp++;
+ }
+
+ //remove any trailing spaces
+ tmp = clr+strlen(clr)-1;
+ while( *tmp == ' ' ) {
+ *tmp = '\0';
+ tmp--;
+ }
+
+ if (!FreeImage_LookupX11Color(clr, &rgba.r, &rgba.g, &rgba.b)) {
+ sprintf(msg, "Unknown color name '%s'", str);
+ free(str);
+ throw msg;
+ }
+ }
+ } else {
+ free(str);
+ throw "Only color visuals are supported";
+ }
+
+ //add color to map
+ rgba.a = (BYTE)((colors > 256) ? 0 : i);
+ rawpal[chrs] = rgba;
+
+ //build palette if needed
+ if ( colors <= 256 ) {
+ RGBQUAD *pal = FreeImage_GetPalette(dib);
+ pal[i].rgbBlue = rgba.b;
+ pal[i].rgbGreen = rgba.g;
+ pal[i].rgbRed = rgba.r;
+ }
+
+ free(str);
+ }
+ //done parsing color map
+
+ if(header_only) {
+ // header only mode
+ return dib;
+ }
+
+ //read in pixel data
+ for(int y = 0; y < height; y++ ) {
+ BYTE *line = FreeImage_GetScanLine(dib, height - y - 1);
+ str = ReadString(io, handle);
+ if (!str)
+ throw "Error reading pixel strings";
+ char *pixel_ptr = str;
+
+ for(int x = 0; x < width; x++ ) {
+ //locate the chars in the color map
+ std::string chrs(pixel_ptr,cpp);
+ FILE_RGBA rgba = rawpal[chrs];
+
+ if ( colors > 256 ) {
+ line[FI_RGBA_BLUE] = rgba.b;
+ line[FI_RGBA_GREEN] = rgba.g;
+ line[FI_RGBA_RED] = rgba.r;
+ line += 3;
+ } else {
+ *line = rgba.a;
+ line++;
+ }
+
+ pixel_ptr += cpp;
+ }
+
+ free(str);
+ }
+ //done reading pixel data
+
+ return dib;
+ } catch(const char *text) {
+ FreeImage_OutputMessageProc(s_format_id, text);
+
+ if ( dib != NULL )
+ FreeImage_Unload(dib);
+
+ return NULL;
+ }
+}
+
+static BOOL DLL_CALLCONV
+Save(FreeImageIO *io, FIBITMAP *dib, fi_handle handle, int page, int flags, void *data) {
+ if ((dib != NULL) && (handle != NULL)) {
+ char header[] = "/* XPM */\nstatic char *freeimage[] = {\n/* width height num_colors chars_per_pixel */\n\"",
+ start_colors[] = "\",\n/* colors */\n\"",
+ start_pixels[] = "\",\n/* pixels */\n\"",
+ new_line[] = "\",\n\"",
+ footer[] = "\"\n};\n",
+ buf[256]; //256 is more then enough to sprintf 4 ints into, or the base-92 chars and #rrggbb line
+
+ if ( io->write_proc(header, (unsigned int)strlen(header), 1, handle) != 1 )
+ return FALSE;
+
+ int width = FreeImage_GetWidth(dib), height = FreeImage_GetHeight(dib), bpp = FreeImage_GetBPP(dib);
+ RGBQUAD *pal = FreeImage_GetPalette(dib);
+ int x,y;
+
+ //map base92 chrs to the rgb value to create the palette
+ std::map<DWORD,FILE_RGB> chrs2color;
+ //map 8bpp index or 24bpp rgb value to the base92 chrs to create pixel data
+ typedef union {
+ DWORD index;
+ FILE_RGBA rgba;
+ } DWORDRGBA;
+ std::map<DWORD,std::string> color2chrs;
+
+ //loop thru entire dib, if new color, inc num_colors and add to both maps
+ int num_colors = 0;
+ for(y = 0; y < height; y++ ) {
+ BYTE *line = FreeImage_GetScanLine(dib, height - y - 1);
+ for(x = 0; x < width; x++ ) {
+ FILE_RGB rgb;
+ DWORDRGBA u;
+ if ( bpp > 8 ) {
+ u.rgba.b = rgb.b = line[FI_RGBA_BLUE];
+ u.rgba.g = rgb.g = line[FI_RGBA_GREEN];
+ u.rgba.r = rgb.r = line[FI_RGBA_RED];
+ u.rgba.a = 0;
+ line += 3;
+ } else {
+ u.index = *line;
+ rgb.b = pal[u.index].rgbBlue;
+ rgb.g = pal[u.index].rgbGreen;
+ rgb.r = pal[u.index].rgbRed;
+ line++;
+ }
+ if ( color2chrs.find(u.index) == color2chrs.end() ) { //new color
+ std::string chrs(Base92(num_colors));
+ color2chrs[u.index] = chrs;
+ chrs2color[num_colors] = rgb;
+ num_colors++;
+ }
+ }
+ }
+
+ int cpp = (int)(log((double)num_colors)/log(92.0)) + 1;
+
+ sprintf(buf, "%d %d %d %d", FreeImage_GetWidth(dib), FreeImage_GetHeight(dib), num_colors, cpp );
+ if ( io->write_proc(buf, (unsigned int)strlen(buf), 1, handle) != 1 )
+ return FALSE;
+
+ if ( io->write_proc(start_colors, (unsigned int)strlen(start_colors), 1, handle) != 1 )
+ return FALSE;
+
+ //write colors, using map of chrs->rgb
+ for(x = 0; x < num_colors; x++ ) {
+ sprintf(buf, "%*s c #%02x%02x%02x", cpp, Base92(x), chrs2color[x].r, chrs2color[x].g, chrs2color[x].b );
+ if ( io->write_proc(buf, (unsigned int)strlen(buf), 1, handle) != 1 )
+ return FALSE;
+ if ( x == num_colors - 1 ) {
+ if ( io->write_proc(start_pixels, (unsigned int)strlen(start_pixels), 1, handle) != 1 )
+ return FALSE;
+ } else {
+ if ( io->write_proc(new_line, (unsigned int)strlen(new_line), 1, handle) != 1 )
+ return FALSE;
+ }
+ }
+
+
+ //write pixels, using map of rgb(if 24bpp) or index(if 8bpp)->chrs
+ for(y = 0; y < height; y++ ) {
+ BYTE *line = FreeImage_GetScanLine(dib, height - y - 1);
+ for(x = 0; x < width; x++ ) {
+ DWORDRGBA u;
+ if ( bpp > 8 ) {
+ u.rgba.b = line[FI_RGBA_BLUE];
+ u.rgba.g = line[FI_RGBA_GREEN];
+ u.rgba.r = line[FI_RGBA_RED];
+ u.rgba.a = 0;
+ line += 3;
+ } else {
+ u.index = *line;
+ line++;
+ }
+ sprintf(buf, "%*s", cpp, (char *)color2chrs[u.index].c_str());
+ if ( io->write_proc(buf, cpp, 1, handle) != 1 )
+ return FALSE;
+ }
+ if ( y == height - 1 ) {
+ if ( io->write_proc(footer, (unsigned int)strlen(footer), 1, handle) != 1 )
+ return FALSE;
+ } else {
+ if ( io->write_proc(new_line, (unsigned int)strlen(new_line), 1, handle) != 1 )
+ return FALSE;
+ }
+ }
+
+ return TRUE;
+ } else {
+ return FALSE;
+ }
+}
+
+// ==========================================================
+// Init
+// ==========================================================
+
+void DLL_CALLCONV
+InitXPM(Plugin *plugin, int format_id)
+{
+ s_format_id = format_id;
+
+ plugin->format_proc = Format;
+ plugin->description_proc = Description;
+ plugin->extension_proc = Extension;
+ plugin->regexpr_proc = RegExpr;
+ plugin->open_proc = NULL;
+ plugin->close_proc = NULL;
+ plugin->pagecount_proc = NULL;
+ plugin->pagecapability_proc = NULL;
+ plugin->load_proc = Load;
+ plugin->save_proc = Save;
+ plugin->validate_proc = Validate;
+ plugin->mime_proc = MimeType;
+ plugin->supports_export_bpp_proc = SupportsExportDepth;
+ plugin->supports_export_type_proc = SupportsExportType;
+ plugin->supports_icc_profiles_proc = NULL;
+ plugin->supports_no_pixels_proc = SupportsNoPixels;
+}
+
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