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 #ifdef __OS2__
 129     HPS                             hpsScreen;
 130     HDC                             hdcScreen;
 131     LONG                            lPlanes;
 132     LONG                            lBitsPerPixel;
 133     LONG                            nDepth;
 134
 135     hpsScreen = WinGetScreenPS(HWND_DESKTOP);
 136     hdcScreen = GpiQueryDevice(hpsScreen);
 137     DevQueryCaps(hdcScreen, CAPS_COLOR_PLANES, 1L, &lPlanes);
 138     DevQueryCaps(hdcScreen, CAPS_COLOR_BITCOUNT, 1L, &lBitsPerPixel);
 139     b = (int)lBitsPerPixel;
 140     WinReleasePS(hpsScreen);
 141 #else
 142     b = GetDeviceCaps(*display, BITSPIXEL);
 143     d = GetDeviceCaps(*display, PLANES);
 144 #endif
 145     return (b);
 146 }
 147
 148 Colormap *
 149 XDefaultColormap(Display *display, Screen *screen)
 150 {
 151     return (NULL);
 152 }
 153
 154 /* convert hex color names,
 155    wrong digits (not a-f,A-F,0-9) are treated as zero */
 156 static int
 157 hexCharToInt(char c)
 158 {
 159     int r;
 160
 161     if (c >= '0' && c <= '9')
 162         r = c - '0';
 163     else if (c >= 'a' && c <= 'f')
 164         r = c - 'a' + 10;
 165     else if (c >= 'A' && c <= 'F')
 166         r = c - 'A' + 10;
 167     else
 168         r = 0;
 169
 170     return (r);
 171 }
 172
 173 static int
 174 rgbFromHex(char *hex, int *r, int *g, int *b)
 175 {
 176     int len;
 177
 178     if (hex == NULL || hex[0] != '#')
 179         return (0);
 180
 181     len = strlen(hex);
 182     if (len == 3 + 1) {
 183         *r = hexCharToInt(hex[1]);
 184         *g = hexCharToInt(hex[2]);
 185         *b = hexCharToInt(hex[3]);
 186     } else if (len == 6 + 1) {
 187         *r = hexCharToInt(hex[1]) * 16 + hexCharToInt(hex[2]);
 188         *g = hexCharToInt(hex[3]) * 16 + hexCharToInt(hex[4]);
 189         *b = hexCharToInt(hex[5]) * 16 + hexCharToInt(hex[6]);
 190     } else if (len == 12 + 1) {
 191         /* it's like c #32329999CCCC */
 192         /* so for now only take two digits */
 193         *r = hexCharToInt(hex[1]) * 16 + hexCharToInt(hex[2]);
 194         *g = hexCharToInt(hex[5]) * 16 + hexCharToInt(hex[6]);
 195         *b = hexCharToInt(hex[9]) * 16 + hexCharToInt(hex[10]);
 196     } else
 197         return (0);
 198
 199     return (1);
 200 }
 201
 202 /* Color related functions */
 203 int
 204 XParseColor(Display *d, Colormap *cmap, char *name, XColor *color)
 205 {
 206     int r, g, b;                        /* only 8 bit values used */
 207     int okay;
 208
 209 /* TODO: use colormap via PALETTE */
 210     /* parse name either in table or #RRGGBB #RGB */
 211     if (name == NULL)
 212         return (0);
 213
 214     if (name[0] == '#') {               /* a hex string */
 215         okay = rgbFromHex(name, &r, &g, &b);
 216     } else {
 217         okay = xpmGetRGBfromName(name, &r, &g, &b);
 218     }
 219
 220     if (okay) {
 221 #ifdef __OS2__
 222         color->pixel = OS2RGB(r, g, b);
 223 #else
 224         color->pixel = RGB(r, g, b);
 225 #endif
 226         color->red = (BYTE) r;
 227         color->green = (BYTE) g;
 228         color->blue = (BYTE) b;
 229         return (1);
 230     } else
 231         return (0);                     /* --> ColorError */
 232 }
 233
 234
 235 /* GRG: 2nd arg is Colormap*, not Colormap */
 236
 237 int
 238 XAllocColor(Display *d, Colormap *cmap, XColor *color)
 239 {
 240 /* colormap not used yet so color->pixel is the real COLORREF (RBG) and not an
 241    index in some colormap as in X */
 242     return (1);
 243 }
 244 void
 245 XQueryColors(Display *display, Colormap *colormap,
 246              XColor *xcolors, int ncolors)
 247 {
 248 /* under X this fills the rgb values to given .pixel */
 249 /* since there no colormap use FOR_MSW (not yet!!), rgb is plain encoded */
 250     XColor *xc = xcolors;
 251     int i;
 252
 253     for (i = 0; i < ncolors; i++, xc++) {
 254         xc->red = GetRValue(xc->pixel);
 255         xc->green = GetGValue(xc->pixel);
 256         xc->blue = GetBValue(xc->pixel);
 257     }
 258     return;
 259 }
 260 int
 261 XFreeColors(Display *d, Colormap cmap,
 262             unsigned long pixels[], int npixels, unsigned long planes)
 263 {
 264     /* no colormap yet */
 265     return (0);                         /* correct ??? */
 266 }
 267
 268 /* XImage functions */
 269 XImage *
 270 XCreateImage(Display *d, Visual *v,
 271              int depth, int format,
 272              int x, int y, int width, int height,
 273              int pad, int foo)
 274 {
 275     XImage *img = (XImage *) XpmMalloc(sizeof(XImage));
 276 #ifdef __OS2__
 277     BITMAPINFOHEADER2    bmih;
 278
 279     memset(&bmih, 0, sizeof(BITMAPINFOHEADER2));
 280     bmih.cbFix = sizeof(BITMAPINFOHEADER2);
 281     bmih.cx = width;
 282     bmih.cy = height;
 283     bmih.cPlanes = 1;
 284     bmih.cBitCount = depth;
 285 #endif
 286
 287     if (img) {
 288         /*JW: This is what it should be, but the picture comes out
 289               just black!?  It appears to be doing monochrome reduction,
 290               but I've got no clue why.  Using CreateBitmap() is supposed
 291               to be slower, but otherwise ok
 292           if ( depth == GetDeviceCaps(*d, BITSPIXEL) ) {
 293             img->bitmap = CreateCompatibleBitmap(*d, width, height);
 294         } else*/ {
 295 #ifdef __OS2__
 296         img->bitmap = GpiCreateBitmap(*d, &bmih, 0L, NULL, NULL);
 297         WinReleasePS(*d);
 298 #else
 299             img->bitmap = CreateBitmap(width, height, 1 /* plane */ ,
 300                                        depth /* bits per pixel */ , NULL);
 301 #endif
 302         }
 303         img->width = width;
 304         img->height = height;
 305         img->depth = depth;
 306     }
 307     return (img);
 308
 309 }
 310
 311 void
 312 XImageFree(XImage *img)
 313 {
 314     if (img) {
 315         XpmFree(img);
 316     }
 317 }
 318 void
 319 XDestroyImage(XImage *img)
 320 {
 321     if (img) {
 322 #ifdef __OS2__
 323      GpiDeleteBitmap(img->bitmap);
 324 #else
 325         DeleteObject(img->bitmap);      /* check return ??? */
 326 #endif
 327         XImageFree(img);
 328     }
 329 }
 330
 331 #endif