src/xpm/simx.c

   1 /*
   2  * Copyright (C) 1989-95 GROUPE BULL
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a copy
   5  * of this software and associated documentation files (the "Software"), to
   6  * deal in the Software without restriction, including without limitation the
   7  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
   8  * sell copies of the Software, and to permit persons to whom the Software is
   9  * furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  17  * GROUPE BULL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  18  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  19  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  20  *
  21  * Except as contained in this notice, the name of GROUPE BULL shall not be
  22  * used in advertising or otherwise to promote the sale, use or other dealings
  23  * in this Software without prior written authorization from GROUPE BULL.
  24  */
  25
  26 /*****************************************************************************\
  27 * simx.c: 0.1a                                                                *
  28 *                                                                             *
  29 * This emulates some Xlib functionality for MSW. It's not a general solution, *
  30 * it is close related to XPM-lib. It is only intended to satisfy what is need *
  31 * there. Thus allowing to read XPM files under MS windows.                    *
  32 *                                                                             *
  33 * Developed by HeDu 3/94 (hedu@cul-ipn.uni-kiel.de)                           *
  34 \*****************************************************************************/
  35
  36 /* Moved here so that FOR_MSW gets defined if we are using wxWindows (GRG) */
  37 #include "xpm.h"
  38
  39 #ifdef FOR_MSW
  40
  41 #include "xpmi.h"                       /* for XpmMalloc */
  42
  43 /*
  44  * On DOS size_t is only 2 bytes, thus malloc(size_t s) can only malloc
  45  * 64K. BUT an expression data=malloc(width*height) may result in an
  46  * overflow. So this function takes a long as input, and returns NULL if the
  47  * request is larger than 64K, is size_t is only 2 bytes.
  48  *
  49  * This requires casts like XpmMalloc( (long)width*(long(height)), else it
  50  * might have no effect at all.
  51  */
  52
  53 void *
  54 boundCheckingMalloc(long s)
  55 {
  56     if (sizeof(size_t) == sizeof(long)) {       /* same size, just do it */
  57         return (malloc((size_t) s));
  58     } else {
  59         if (sizeof(size_t) == 2) {
  60             if (s > 0xFFFF)
  61                 return (NULL);          /* to large, size_t with 2 bytes
  62                                          * only allows 16 bits */
  63             else
  64                 return (malloc((size_t) s));
  65         } else {                        /* it's not a long, not 2 bytes,
  66                                          * what is it ??? */
  67             return (malloc((size_t) s));
  68         }
  69     }
  70 }
  71 void *
  72 boundCheckingCalloc(long num, long s)
  73 {
  74     if (sizeof(size_t) == sizeof(long)) {       /* same size, just do it */
  75         return (calloc((size_t) num, (size_t) s));
  76     } else {
  77         if (sizeof(size_t) == 2) {
  78             if (s > 0xFFFF || num * s > 0xFFFF)
  79                 return (NULL);          /* to large, size_t with 2 bytes
  80                                          * only allows 16 bits */
  81             else
  82                 return (calloc((size_t) num, (size_t) s));
  83         } else {                        /* it's not a long, not 2 bytes,
  84                                          * what is it ??? */
  85             return (calloc((size_t) num, (size_t) s));
  86         }
  87     }
  88 }
  89 void *
  90 boundCheckingRealloc(void *p, long s)
  91 {
  92     if (sizeof(size_t) == sizeof(long)) {       /* same size, just do it */
  93         return (realloc(p, (size_t) s));
  94     } else {
  95         if (sizeof(size_t) == 2) {
  96             if (s > 0xFFFF)
  97                 return (NULL);          /* to large, size_t with 2 bytes
  98                                          * only allows 16 bits */
  99             else
 100                 return (realloc(p, (size_t) s));
 101         } else {                        /* it's not a long, not 2 bytes,
 102                                          * what is it ??? */
 103             return (realloc(p, (size_t) s));
 104         }
 105     }
 106 }
 107
 108 /* static Visual theVisual = { 0 }; */
 109 Visual *
 110 XDefaultVisual(Display *display, Screen *screen)
 111 {
 112     return (NULL);                      /* struct could contain info about
 113                                          * MONO, GRAY, COLOR */
 114 }
 115
 116 Screen *
 117 XDefaultScreen(Display *d)
 118 {
 119     return (NULL);
 120 }
 121
 122 /* I get only 1 plane but 8 bits per pixel,
 123    so I think BITSPIXEL should be depth */
 124 int
 125 XDefaultDepth(Display *display, Screen *screen)
 126 {
 127     int d, b;
 128
 129     b = GetDeviceCaps(*display, BITSPIXEL);
 130     d = GetDeviceCaps(*display, PLANES);
 131     return (b);
 132 }
 133
 134 Colormap *
 135 XDefaultColormap(Display *display, Screen *screen)
 136 {
 137     return (NULL);
 138 }
 139
 140 /* convert hex color names,
 141    wrong digits (not a-f,A-F,0-9) are treated as zero */
 142 static int
 143 hexCharToInt(c)
 144 {
 145     int r;
 146
 147     if (c >= '0' && c <= '9')
 148         r = c - '0';
 149     else if (c >= 'a' && c <= 'f')
 150         r = c - 'a' + 10;
 151     else if (c >= 'A' && c <= 'F')
 152         r = c - 'A' + 10;
 153     else
 154         r = 0;
 155
 156     return (r);
 157 }
 158
 159 static int
 160 rgbFromHex(char *hex, int *r, int *g, int *b)
 161 {
 162     int len;
 163
 164     if (hex == NULL || hex[0] != '#')
 165         return (0);
 166
 167     len = strlen(hex);
 168     if (len == 3 + 1) {
 169         *r = hexCharToInt(hex[1]);
 170         *g = hexCharToInt(hex[2]);
 171         *b = hexCharToInt(hex[3]);
 172     } else if (len == 6 + 1) {
 173         *r = hexCharToInt(hex[1]) * 16 + hexCharToInt(hex[2]);
 174         *g = hexCharToInt(hex[3]) * 16 + hexCharToInt(hex[4]);
 175         *b = hexCharToInt(hex[5]) * 16 + hexCharToInt(hex[6]);
 176     } else if (len == 12 + 1) {
 177         /* it's like c #32329999CCCC */
 178         /* so for now only take two digits */
 179         *r = hexCharToInt(hex[1]) * 16 + hexCharToInt(hex[2]);
 180         *g = hexCharToInt(hex[5]) * 16 + hexCharToInt(hex[6]);
 181         *b = hexCharToInt(hex[9]) * 16 + hexCharToInt(hex[10]);
 182     } else
 183         return (0);
 184
 185     return (1);
 186 }
 187
 188 /* Color related functions */
 189 int
 190 XParseColor(Display *d, Colormap *cmap, char *name, XColor *color)
 191 {
 192     int r, g, b;                        /* only 8 bit values used */
 193     int okay;
 194
 195 /* TODO: use colormap via PALETTE */
 196     /* parse name either in table or #RRGGBB #RGB */
 197     if (name == NULL)
 198         return (0);
 199
 200     if (name[0] == '#') {               /* a hex string */
 201         okay = rgbFromHex(name, &r, &g, &b);
 202     } else {
 203         okay = xpmGetRGBfromName(name, &r, &g, &b);
 204     }
 205
 206     if (okay) {
 207         color->pixel = RGB(r, g, b);
 208         color->red = (BYTE) r;
 209         color->green = (BYTE) g;
 210         color->blue = (BYTE) b;
 211         return (1);
 212     } else
 213         return (0);                     /* --> ColorError */
 214 }
 215
 216
 217 /* GRG: 2nd arg is Colormap*, not Colormap */
 218
 219 int
 220 XAllocColor(Display *d, Colormap *cmap, XColor *color)
 221 {
 222 /* colormap not used yet so color->pixel is the real COLORREF (RBG) and not an
 223    index in some colormap as in X */
 224     return (1);
 225 }
 226 void
 227 XQueryColors(Display *display, Colormap *colormap,
 228              XColor *xcolors, int ncolors)
 229 {
 230 /* under X this fills the rgb values to given .pixel */
 231 /* since there no colormap use FOR_MSW (not yet!!), rgb is plain encoded */
 232     XColor *xc = xcolors;
 233     int i;
 234
 235     for (i = 0; i < ncolors; i++, xc++) {
 236         xc->red = GetRValue(xc->pixel);
 237         xc->green = GetGValue(xc->pixel);
 238         xc->blue = GetBValue(xc->pixel);
 239     }
 240     return;
 241 }
 242 int
 243 XFreeColors(Display *d, Colormap cmap,
 244             unsigned long pixels[], int npixels, unsigned long planes)
 245 {
 246     /* no colormap yet */
 247     return (0);                         /* correct ??? */
 248 }
 249
 250 /* XImage functions */
 251 XImage *
 252 XCreateImage(Display *d, Visual *v,
 253              int depth, int format,
 254              int x, int y, int width, int height,
 255              int pad, int foo)
 256 {
 257     XImage *img = (XImage *) XpmMalloc(sizeof(XImage));
 258
 259     if (img) {
 260         /*JW: This is what it should be, but the picture comes out
 261               just black!?  It appears to be doing monochrome reduction,
 262               but I've got no clue why.  Using CreateBitmap() is supposed
 263               to be slower, but otherwise ok
 264           if ( depth == GetDeviceCaps(*d, BITSPIXEL) ) {
 265             img->bitmap = CreateCompatibleBitmap(*d, width, height);
 266         } else*/ {
 267             img->bitmap = CreateBitmap(width, height, 1 /* plane */ ,
 268                                        depth /* bits per pixel */ , NULL);
 269         }
 270         img->width = width;
 271         img->height = height;
 272         img->depth = depth;
 273     }
 274     return (img);
 275
 276 }
 277
 278 void
 279 XImageFree(XImage *img)
 280 {
 281     if (img) {
 282         XpmFree(img);
 283     }
 284 }
 285 void
 286 XDestroyImage(XImage *img)
 287 {
 288     if (img) {
 289         DeleteObject(img->bitmap);      /* check return ??? */
 290         XImageFree(img);
 291     }
 292 }
 293
 294 #endif