Dogcows Code - chaz/openbox/blob - render/render.c

   1 #include <X11/Xlib.h>
   2 #include <X11/Xutil.h>
   3 #include <glib.h>
   4 #include "render.h"
   5 #include "gradient.h"
   6 #include "font.h"
   7 #include "mask.h"
   8 #include "color.h"
   9 #include "image.h"
  10 #include "kernel/openbox.h"
  11
  12 #ifdef HAVE_STDLIB_H
  13 #  include <stdlib.h>
  14 #endif
  15
  16 int render_depth;
  17 Visual *render_visual;
  18 Colormap render_colormap;
  19 int render_red_offset = 0, render_green_offset = 0, render_blue_offset = 0;
  20 int render_red_shift, render_green_shift, render_blue_shift;
  21
  22 void render_startup(void)
  23 {
  24     paint = x_paint;
  25
  26     render_depth = DefaultDepth(ob_display, ob_screen);
  27     render_visual = DefaultVisual(ob_display, ob_screen);
  28     render_colormap = DefaultColormap(ob_display, ob_screen);
  29
  30     if (render_depth < 8) {
  31       XVisualInfo vinfo_template, *vinfo_return;
  32       /* search for a TrueColor Visual... if we can't find one...
  33          we will use the default visual for the screen */
  34       int vinfo_nitems;
  35       int best = -1;
  36
  37       vinfo_template.screen = ob_screen;
  38       vinfo_template.class = TrueColor;
  39       vinfo_return = XGetVisualInfo(ob_display,
  40                                     VisualScreenMask | VisualClassMask,
  41                                     &vinfo_template, &vinfo_nitems);
  42       if (vinfo_return) {
  43         int i;
  44         int max_depth = 1;
  45         for (i = 0; i < vinfo_nitems; ++i) {
  46           if (vinfo_return[i].depth > max_depth) {
  47             if (max_depth == 24 && vinfo_return[i].depth > 24)
  48                 break;          /* prefer 24 bit over 32 */
  49             max_depth = vinfo_return[i].depth;
  50             best = i;
  51           }
  52         }
  53         if (max_depth < render_depth) best = -1;
  54       }
  55       if (best != -1) {
  56         render_depth = vinfo_return[best].depth;
  57         render_visual = vinfo_return[best].visual;
  58         render_colormap = XCreateColormap(ob_display, ob_root, render_visual,
  59                                           AllocNone);
  60       }
  61       XFree(vinfo_return);
  62     }
  63   switch (render_visual->class) {
  64   case TrueColor:
  65     truecolor_startup();
  66     break;
  67   case PseudoColor:
  68   case StaticColor:
  69   case GrayScale:
  70   case StaticGray:
  71     pseudocolor_startup();
  72     break;
  73   default:
  74     g_critical("unsupported visual class.\n");
  75     exit(EXIT_FAILURE);
  76
  77   }
  78 }
  79
  80 void truecolor_startup(void)
  81 {
  82   unsigned long red_mask, green_mask, blue_mask;
  83   XImage *timage = NULL;
  84
  85   timage = XCreateImage(ob_display, render_visual, render_depth,
  86                         ZPixmap, 0, NULL, 1, 1, 32, 0);
  87   g_assert(timage != NULL);
  88   /* find the offsets for each color in the visual's masks */
  89   red_mask = timage->red_mask;
  90   green_mask = timage->green_mask;
  91   blue_mask = timage->blue_mask;
  92
  93   render_red_offset = 0;
  94   render_green_offset = 0;
  95   render_blue_offset = 0;
  96
  97   while (! (red_mask & 1))   { render_red_offset++;   red_mask   >>= 1; }
  98   while (! (green_mask & 1)) { render_green_offset++; green_mask >>= 1; }
  99   while (! (blue_mask & 1))  { render_blue_offset++;  blue_mask  >>= 1; }
 100
 101   render_red_shift = render_green_shift = render_blue_shift = 8;
 102   while (red_mask)   { red_mask   >>= 1; render_red_shift--;   }
 103   while (green_mask) { green_mask >>= 1; render_green_shift--; }
 104   while (blue_mask)  { blue_mask  >>= 1; render_blue_shift--;  }
 105   XFree(timage);
 106 }
 107
 108 void pseudocolor_startup(void)
 109 {
 110   XColor icolors[256];
 111   int tr, tg, tb, n, r, g, b, i, incolors, ii;
 112   unsigned long dev;
 113   int cpc, _ncolors;
 114   g_message("Initializing PseudoColor RenderControl\n");
 115
 116   /* determine the number of colors and the bits-per-color */
 117   pseudo_bpc = 2; /* XXX THIS SHOULD BE A USER OPTION */
 118   g_assert(pseudo_bpc >= 1);
 119   _ncolors = 1 << (pseudo_bpc * 3);
 120
 121   if (_ncolors > 1 << render_depth) {
 122     g_warning("PseudoRenderControl: Invalid colormap size. Resizing.\n");
 123     pseudo_bpc = 1 << (render_depth/3) >> 3;
 124     _ncolors = 1 << (pseudo_bpc * 3);
 125   }
 126
 127   /* build a color cube */
 128   pseudo_colors = malloc(_ncolors * sizeof(XColor));
 129   cpc = 1 << pseudo_bpc; /* colors per channel */
 130
 131   for (n = 0, r = 0; r < cpc; r++)
 132     for (g = 0; g < cpc; g++)
 133       for (b = 0; b < cpc; b++, n++) {
 134         tr = (int)(((float)(r)/(float)(cpc-1)) * 0xFF);
 135         tg = (int)(((float)(g)/(float)(cpc-1)) * 0xFF);
 136         tb = (int)(((float)(b)/(float)(cpc-1)) * 0xFF);
 137         pseudo_colors[n].red = tr | tr << 8;
 138         pseudo_colors[n].green = tg | tg << 8;
 139         pseudo_colors[n].blue = tb | tb << 8;
 140         pseudo_colors[n].flags = DoRed|DoGreen|DoBlue; /* used to track
 141                                                           allocation */
 142       }
 143
 144   /* allocate the colors */
 145   for (i = 0; i < _ncolors; i++)
 146     if (!XAllocColor(ob_display, render_colormap, &pseudo_colors[i]))
 147       pseudo_colors[i].flags = 0; /* mark it as unallocated */
 148
 149   /* try allocate any colors that failed allocation above */
 150
 151   /* get the allocated values from the X server (only the first 256 XXX why!?)
 152    */
 153   incolors = (((1 << render_depth) > 256) ? 256 : (1 << render_depth));
 154   for (i = 0; i < incolors; i++)
 155     icolors[i].pixel = i;
 156   XQueryColors(ob_display, render_colormap, icolors, incolors);
 157
 158   /* try match unallocated ones */
 159   for (i = 0; i < _ncolors; i++) {
 160     if (!pseudo_colors[i].flags) { /* if it wasn't allocated... */
 161       unsigned long closest = 0xffffffff, close = 0;
 162       for (ii = 0; ii < incolors; ii++) {
 163         /* find deviations */
 164         r = (pseudo_colors[i].red - icolors[ii].red) & 0xff;
 165         g = (pseudo_colors[i].green - icolors[ii].green) & 0xff;
 166         b = (pseudo_colors[i].blue - icolors[ii].blue) & 0xff;
 167         /* find a weighted absolute deviation */
 168         dev = (r * r) + (g * g) + (b * b);
 169
 170         if (dev < closest) {
 171           closest = dev;
 172           close = ii;
 173         }
 174       }
 175
 176       pseudo_colors[i].red = icolors[close].red;
 177       pseudo_colors[i].green = icolors[close].green;
 178       pseudo_colors[i].blue = icolors[close].blue;
 179       pseudo_colors[i].pixel = icolors[close].pixel;
 180
 181       /* try alloc this closest color, it had better succeed! */
 182       if (XAllocColor(ob_display, render_colormap, &pseudo_colors[i]))
 183         pseudo_colors[i].flags = DoRed|DoGreen|DoBlue; /* mark as alloced */
 184       else
 185         g_assert(FALSE); /* wtf has gone wrong, its already alloced for
 186                             chissake! */
 187     }
 188   }
 189 }
 190
 191 void x_paint(Window win, Appearance *l)
 192 {
 193     int i, transferred = 0, sw;
 194     pixel32 *source, *dest;
 195     Pixmap oldp;
 196     int x = l->area.x;
 197     int y = l->area.y;
 198     int w = l->area.width;
 199     int h = l->area.height;
 200     Rect tarea; /* area in which to draw textures */
 201
 202     if (w <= 0 || h <= 0 || x+w <= 0 || y+h <= 0) return;
 203
 204     g_assert(l->surface.type == Surface_Planar);
 205
 206     oldp = l->pixmap; /* save to free after changing the visible pixmap */
 207     l->pixmap = XCreatePixmap(ob_display, ob_root, x+w, y+h, render_depth);
 208     g_assert(l->pixmap != None);
 209
 210     if (l->xftdraw != NULL)
 211         XftDrawDestroy(l->xftdraw);
 212     l->xftdraw = XftDrawCreate(ob_display, l->pixmap, render_visual,
 213                                render_colormap);
 214     g_assert(l->xftdraw != NULL);
 215
 216     g_free(l->surface.data.planar.pixel_data);
 217     l->surface.data.planar.pixel_data = g_new(pixel32, w * h);
 218
 219
 220     if (l->surface.data.planar.grad == Background_ParentRelative) {
 221         sw = l->surface.data.planar.parent->area.width;
 222         source = l->surface.data.planar.parent->surface.data.planar.pixel_data
 223             + l->surface.data.planar.parentx
 224             + sw * l->surface.data.planar.parenty;
 225         dest = l->surface.data.planar.pixel_data;
 226         for (i = 0; i < h; i++, source += sw, dest += w) {
 227             memcpy(dest, source, w * sizeof(pixel32));
 228         }
 229     }
 230     else if (l->surface.data.planar.grad == Background_Solid)
 231         gradient_solid(l, x, y, w, h);
 232     else gradient_render(&l->surface, w, h);
 233
 234     for (i = 0; i < l->textures; i++) {
 235         tarea = l->texture[i].position;
 236         if (l->surface.data.planar.grad != Background_ParentRelative) {
 237             if (l->surface.data.planar.relief != Flat) {
 238                 switch (l->surface.data.planar.bevel) {
 239                 case Bevel1:
 240                     tarea.x += 1; tarea.y += 1;
 241                     tarea.width -= 2; tarea.height -= 2;
 242                     break;
 243                 case Bevel2:
 244                     tarea.x += 2; tarea.y += 2;
 245                     tarea.width -= 4; tarea.height -= 4;
 246                     break;
 247                 }
 248             } else if (l->surface.data.planar.border) {
 249                 tarea.x += 1; tarea.y += 1;
 250                 tarea.width -= 2; tarea.height -= 2;
 251             }
 252         }
 253
 254         switch (l->texture[i].type) {
 255         case Text:
 256             if (!transferred) {
 257                 transferred = 1;
 258                 if (l->surface.data.planar.grad != Background_Solid)
 259                     pixel32_to_pixmap(l->surface.data.planar.pixel_data,
 260                                       l->pixmap,x,y,w,h);
 261             }
 262             if (l->xftdraw == NULL) {
 263                 l->xftdraw = XftDrawCreate(ob_display, l->pixmap,
 264                                         render_visual, render_colormap);
 265             }
 266             font_draw(l->xftdraw, &l->texture[i].data.text,
 267                       &tarea);
 268         break;
 269         case Bitmask:
 270             if (!transferred) {
 271                 transferred = 1;
 272                 if (l->surface.data.planar.grad != Background_Solid)
 273                     pixel32_to_pixmap(l->surface.data.planar.pixel_data,
 274                                       l->pixmap,x,y,w,h);
 275             }
 276             if (l->texture[i].data.mask.color->gc == None)
 277                 color_allocate_gc(l->texture[i].data.mask.color);
 278             mask_draw(l->pixmap, &l->texture[i].data.mask,
 279                       &tarea);
 280         break;
 281         case RGBA:
 282             image_draw(l->surface.data.planar.pixel_data,
 283                        &l->texture[i].data.rgba,
 284                        &tarea, &l->area);
 285         break;
 286         }
 287     }
 288
 289     if (!transferred) {
 290         transferred = 1;
 291         if (l->surface.data.planar.grad != Background_Solid)
 292             pixel32_to_pixmap(l->surface.data.planar.pixel_data, l->pixmap
 293                               ,x,y,w,h);
 294     }
 295
 296
 297     XSetWindowBackgroundPixmap(ob_display, win, l->pixmap);
 298     XClearWindow(ob_display, win);
 299     if (oldp != None) XFreePixmap(ob_display, oldp);
 300 }
 301
 302 /*
 303 void gl_paint(Window win, Appearance *l)
 304 {
 305     glXMakeCurrent(ob_display, win, gl_context);
 306 }
 307 */
 308
 309 void render_shutdown(void)
 310 {
 311 }
 312
 313 Appearance *appearance_new(SurfaceType type, int numtex)
 314 {
 315   PlanarSurface *p;
 316   Appearance *out;
 317
 318   out = g_new(Appearance, 1);
 319   out->surface.type = type;
 320   out->textures = numtex;
 321   out->xftdraw = NULL;
 322   if (numtex) out->texture = g_new0(Texture, numtex);
 323   else out->texture = NULL;
 324   out->pixmap = None;
 325
 326   switch (type) {
 327   case Surface_Planar:
 328     p = &out->surface.data.planar;
 329     p->primary = NULL;
 330     p->secondary = NULL;
 331     p->border_color = NULL;
 332     p->pixel_data = NULL;
 333     break;
 334   }
 335   return out;
 336 }
 337
 338 Appearance *appearance_copy(Appearance *orig)
 339 {
 340     PlanarSurface *spo, *spc;
 341     Appearance *copy = g_new(Appearance, 1);
 342     copy->surface.type = orig->surface.type;
 343     switch (orig->surface.type) {
 344     case Surface_Planar:
 345         spo = &(orig->surface.data.planar);
 346         spc = &(copy->surface.data.planar);
 347         spc->grad = spo->grad;
 348         spc->relief = spo->relief;
 349         spc->bevel = spo->bevel;
 350         if (spo->primary != NULL)
 351             spc->primary = color_new(spo->primary->r,
 352                                      spo->primary->g,
 353                                      spo->primary->b);
 354         else spc->primary = NULL;
 355
 356         if (spo->secondary != NULL)
 357             spc->secondary = color_new(spo->secondary->r,
 358                                        spo->secondary->g,
 359                                        spo->secondary->b);
 360         else spc->secondary = NULL;
 361
 362         if (spo->border_color != NULL)
 363             spc->border_color = color_new(spo->border_color->r,
 364                                           spo->border_color->g,
 365                                           spo->border_color->b);
 366         else spc->border_color = NULL;
 367
 368         spc->interlaced = spo->interlaced;
 369         spc->border = spo->border;
 370         spc->pixel_data = NULL;
 371     break;
 372     }
 373     copy->textures = orig->textures;
 374     copy->texture = g_memdup(orig->texture, orig->textures * sizeof(Texture));
 375     copy->pixmap = None;
 376     copy->xftdraw = NULL;
 377     return copy;
 378 }
 379
 380 void appearance_free(Appearance *a)
 381 {
 382     if (a) {
 383         PlanarSurface *p;
 384         if (a->pixmap != None) XFreePixmap(ob_display, a->pixmap);
 385         if (a->xftdraw != NULL) XftDrawDestroy(a->xftdraw);
 386         if (a->textures)
 387             g_free(a->texture);
 388         if (a->surface.type == Surface_Planar) {
 389             p = &a->surface.data.planar;
 390             if (p->primary != NULL) color_free(p->primary);
 391             if (p->secondary != NULL) color_free(p->secondary);
 392             if (p->border_color != NULL) color_free(p->border_color);
 393             if (p->pixel_data != NULL) g_free(p->pixel_data);
 394         }
 395         g_free(a);
 396     }
 397 }
 398
 399
 400 void pixel32_to_pixmap(pixel32 *in, Pixmap out, int x, int y, int w, int h)
 401 {
 402     unsigned char *scratch;
 403     XImage *im = NULL;
 404     im = XCreateImage(ob_display, render_visual, render_depth,
 405                       ZPixmap, 0, NULL, w, h, 32, 0);
 406     g_assert(im != NULL);
 407     im->byte_order = endian;
 408 /* this malloc is a complete waste of time on normal 32bpp
 409    as reduce_depth just sets im->data = data and returns
 410 */
 411     scratch = malloc(im->width * im->height * sizeof(pixel32));
 412     im->data = (char*) scratch;
 413     reduce_depth(in, im);
 414     XPutImage(ob_display, out, DefaultGC(ob_display, ob_screen),
 415               im, 0, 0, x, y, w, h);
 416     im->data = NULL;
 417     XDestroyImage(im);
 418     free(scratch);
 419 }
 420
 421 void appearance_minsize(Appearance *l, int *w, int *h)
 422 {
 423     int i;
 424     *w = *h = 1;
 425
 426     switch (l->surface.type) {
 427     case Surface_Planar:
 428         if (l->surface.data.planar.relief != Flat) {
 429             switch (l->surface.data.planar.bevel) {
 430             case Bevel1:
 431                 *w = *h = 2;
 432                 break;
 433             case Bevel2:
 434                 *w = *h = 4;
 435                 break;
 436             }
 437         } else if (l->surface.data.planar.border)
 438             *w = *h = 2;
 439
 440         for (i = 0; i < l->textures; ++i)
 441             switch (l->texture[i].type) {
 442             case Bitmask:
 443                 *w += l->texture[i].data.mask.mask->w;
 444                 *h += l->texture[i].data.mask.mask->h;
 445                 break;
 446             case Text:
 447                 *w +=font_measure_string(l->texture[i].data.text.font,
 448                                          l->texture[i].data.text.string,
 449                                          l->texture[i].data.text.shadow,
 450                                          l->texture[i].data.text.offset);
 451                 *h +=  font_height(l->texture[i].data.text.font,
 452                                    l->texture[i].data.text.shadow,
 453                                    l->texture[i].data.text.offset);
 454                 break;
 455             case RGBA:
 456                 *w += l->texture[i].data.rgba.width;
 457                 *h += l->texture[i].data.rgba.height;
 458                 break;
 459             case NoTexture:
 460                 break;
 461             }
 462         break;
 463     }
 464 }