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 "theme.h"
  11 #include "kernel/openbox.h"
  12
  13 #ifdef HAVE_STDLIB_H
  14 #  include <stdlib.h>
  15 #endif
  16
  17 int render_depth;
  18 Visual *render_visual;
  19 Colormap render_colormap;
  20 int render_red_offset = 0, render_green_offset = 0, render_blue_offset = 0;
  21 int render_red_shift, render_green_shift, render_blue_shift;
  22 int render_red_mask, render_green_mask, render_blue_mask;
  23
  24 void render_startup(void)
  25 {
  26     paint = x_paint;
  27
  28     render_depth = DefaultDepth(ob_display, ob_screen);
  29     render_visual = DefaultVisual(ob_display, ob_screen);
  30     render_colormap = DefaultColormap(ob_display, ob_screen);
  31
  32     if (render_depth < 8) {
  33       XVisualInfo vinfo_template, *vinfo_return;
  34       /* search for a TrueColor Visual... if we can't find one...
  35          we will use the default visual for the screen */
  36       int vinfo_nitems;
  37       int best = -1;
  38
  39       vinfo_template.screen = ob_screen;
  40       vinfo_template.class = TrueColor;
  41       vinfo_return = XGetVisualInfo(ob_display,
  42                                     VisualScreenMask | VisualClassMask,
  43                                     &vinfo_template, &vinfo_nitems);
  44       if (vinfo_return) {
  45         int i;
  46         int max_depth = 1;
  47         for (i = 0; i < vinfo_nitems; ++i) {
  48           if (vinfo_return[i].depth > max_depth) {
  49             if (max_depth == 24 && vinfo_return[i].depth > 24)
  50                 break;          /* prefer 24 bit over 32 */
  51             max_depth = vinfo_return[i].depth;
  52             best = i;
  53           }
  54         }
  55         if (max_depth < render_depth) best = -1;
  56       }
  57       if (best != -1) {
  58         render_depth = vinfo_return[best].depth;
  59         render_visual = vinfo_return[best].visual;
  60         render_colormap = XCreateColormap(ob_display, ob_root, render_visual,
  61                                           AllocNone);
  62       }
  63       XFree(vinfo_return);
  64     }
  65   switch (render_visual->class) {
  66   case TrueColor:
  67     truecolor_startup();
  68     break;
  69   case PseudoColor:
  70   case StaticColor:
  71   case GrayScale:
  72   case StaticGray:
  73     pseudocolor_startup();
  74     break;
  75   default:
  76     g_critical("unsupported visual class.\n");
  77     exit(EXIT_FAILURE);
  78
  79   }
  80 }
  81
  82 void truecolor_startup(void)
  83 {
  84   unsigned long red_mask, green_mask, blue_mask;
  85   XImage *timage = NULL;
  86
  87   timage = XCreateImage(ob_display, render_visual, render_depth,
  88                         ZPixmap, 0, NULL, 1, 1, 32, 0);
  89   g_assert(timage != NULL);
  90   /* find the offsets for each color in the visual's masks */
  91   render_red_mask = red_mask = timage->red_mask;
  92   render_green_mask = green_mask = timage->green_mask;
  93   render_blue_mask = blue_mask = timage->blue_mask;
  94
  95   render_red_offset = 0;
  96   render_green_offset = 0;
  97   render_blue_offset = 0;
  98
  99   while (! (red_mask & 1))   { render_red_offset++;   red_mask   >>= 1; }
 100   while (! (green_mask & 1)) { render_green_offset++; green_mask >>= 1; }
 101   while (! (blue_mask & 1))  { render_blue_offset++;  blue_mask  >>= 1; }
 102
 103   render_red_shift = render_green_shift = render_blue_shift = 8;
 104   while (red_mask)   { red_mask   >>= 1; render_red_shift--;   }
 105   while (green_mask) { green_mask >>= 1; render_green_shift--; }
 106   while (blue_mask)  { blue_mask  >>= 1; render_blue_shift--;  }
 107   XFree(timage);
 108 }
 109
 110 void pseudocolor_startup(void)
 111 {
 112   XColor icolors[256];
 113   int tr, tg, tb, n, r, g, b, i, incolors, ii;
 114   unsigned long dev;
 115   int cpc, _ncolors;
 116   g_message("Initializing PseudoColor RenderControl\n");
 117
 118   /* determine the number of colors and the bits-per-color */
 119   pseudo_bpc = 2; /* XXX THIS SHOULD BE A USER OPTION */
 120   g_assert(pseudo_bpc >= 1);
 121   _ncolors = pseudo_ncolors();
 122
 123   if (_ncolors > 1 << render_depth) {
 124     g_warning("PseudoRenderControl: Invalid colormap size. Resizing.\n");
 125     pseudo_bpc = 1 << (render_depth/3) >> 3;
 126     _ncolors = 1 << (pseudo_bpc * 3);
 127   }
 128
 129   /* build a color cube */
 130   pseudo_colors = malloc(_ncolors * sizeof(XColor));
 131   cpc = 1 << pseudo_bpc; /* colors per channel */
 132
 133   for (n = 0, r = 0; r < cpc; r++)
 134     for (g = 0; g < cpc; g++)
 135       for (b = 0; b < cpc; b++, n++) {
 136         tr = (int)(((float)(r)/(float)(cpc-1)) * 0xFF);
 137         tg = (int)(((float)(g)/(float)(cpc-1)) * 0xFF);
 138         tb = (int)(((float)(b)/(float)(cpc-1)) * 0xFF);
 139         pseudo_colors[n].red = tr | tr << 8;
 140         pseudo_colors[n].green = tg | tg << 8;
 141         pseudo_colors[n].blue = tb | tb << 8;
 142         pseudo_colors[n].flags = DoRed|DoGreen|DoBlue; /* used to track
 143                                                           allocation */
 144       }
 145
 146   /* allocate the colors */
 147   for (i = 0; i < _ncolors; i++)
 148     if (!XAllocColor(ob_display, render_colormap, &pseudo_colors[i]))
 149       pseudo_colors[i].flags = 0; /* mark it as unallocated */
 150
 151   /* try allocate any colors that failed allocation above */
 152
 153   /* get the allocated values from the X server (only the first 256 XXX why!?)
 154    */
 155   incolors = (((1 << render_depth) > 256) ? 256 : (1 << render_depth));
 156   for (i = 0; i < incolors; i++)
 157     icolors[i].pixel = i;
 158   XQueryColors(ob_display, render_colormap, icolors, incolors);
 159
 160   /* try match unallocated ones */
 161   for (i = 0; i < _ncolors; i++) {
 162     if (!pseudo_colors[i].flags) { /* if it wasn't allocated... */
 163       unsigned long closest = 0xffffffff, close = 0;
 164       for (ii = 0; ii < incolors; ii++) {
 165         /* find deviations */
 166         r = (pseudo_colors[i].red - icolors[ii].red) & 0xff;
 167         g = (pseudo_colors[i].green - icolors[ii].green) & 0xff;
 168         b = (pseudo_colors[i].blue - icolors[ii].blue) & 0xff;
 169         /* find a weighted absolute deviation */
 170         dev = (r * r) * (0xff - (icolors[ii].red & 0xff)) +
 171             (g * g) * (0xff - (icolors[ii].green & 0xff)) +
 172             (b * b) * (0xff - (icolors[ii].blue & 0xff));
 173
 174         if (dev < closest) {
 175           closest = dev;
 176           close = ii;
 177         }
 178       }
 179
 180       pseudo_colors[i].red = icolors[close].red;
 181       pseudo_colors[i].green = icolors[close].green;
 182       pseudo_colors[i].blue = icolors[close].blue;
 183       pseudo_colors[i].pixel = icolors[close].pixel;
 184
 185       /* try alloc this closest color, it had better succeed! */
 186       if (XAllocColor(ob_display, render_colormap, &pseudo_colors[i]))
 187         pseudo_colors[i].flags = DoRed|DoGreen|DoBlue; /* mark as alloced */
 188       else
 189         g_assert(FALSE); /* wtf has gone wrong, its already alloced for
 190                             chissake! */
 191     }
 192   }
 193 }
 194
 195 void x_paint(Window win, Appearance *l)
 196 {
 197     int i, transferred = 0, sw;
 198     pixel32 *source, *dest;
 199     Pixmap oldp;
 200     int x = l->area.x;
 201     int y = l->area.y;
 202     int w = l->area.width;
 203     int h = l->area.height;
 204     Rect tarea; /* area in which to draw textures */
 205
 206     if (w <= 0 || h <= 0 || x+w <= 0 || y+h <= 0) return;
 207
 208     g_assert(l->surface.type == Surface_Planar);
 209
 210     oldp = l->pixmap; /* save to free after changing the visible pixmap */
 211     l->pixmap = XCreatePixmap(ob_display, ob_root, x+w, y+h, render_depth);
 212     g_assert(l->pixmap != None);
 213
 214     if (l->xftdraw != NULL)
 215         XftDrawDestroy(l->xftdraw);
 216     l->xftdraw = XftDrawCreate(ob_display, l->pixmap, render_visual,
 217                                render_colormap);
 218     g_assert(l->xftdraw != NULL);
 219
 220     g_free(l->surface.data.planar.pixel_data);
 221     l->surface.data.planar.pixel_data = g_new(pixel32, w * h);
 222
 223
 224     if (l->surface.data.planar.grad == Background_ParentRelative) {
 225         sw = l->surface.data.planar.parent->area.width;
 226         source = l->surface.data.planar.parent->surface.data.planar.pixel_data
 227             + l->surface.data.planar.parentx
 228             + sw * l->surface.data.planar.parenty;
 229         dest = l->surface.data.planar.pixel_data;
 230         for (i = 0; i < h; i++, source += sw, dest += w) {
 231             memcpy(dest, source, w * sizeof(pixel32));
 232         }
 233     }
 234     else if (l->surface.data.planar.grad == Background_Solid)
 235         gradient_solid(l, x, y, w, h);
 236     else gradient_render(&l->surface, w, h);
 237
 238     for (i = 0; i < l->textures; i++) {
 239         tarea = l->texture[i].position;
 240         if (l->surface.data.planar.grad != Background_ParentRelative) {
 241             if (l->surface.data.planar.relief != Flat) {
 242                 switch (l->surface.data.planar.bevel) {
 243                 case Bevel1:
 244                     tarea.x += 1; tarea.y += 1;
 245                     tarea.width -= 2; tarea.height -= 2;
 246                     break;
 247                 case Bevel2:
 248                     tarea.x += 2; tarea.y += 2;
 249                     tarea.width -= 4; tarea.height -= 4;
 250                     break;
 251                 }
 252             } else if (l->surface.data.planar.border) {
 253                 tarea.x += 1; tarea.y += 1;
 254                 tarea.width -= 2; tarea.height -= 2;
 255             }
 256         }
 257
 258         switch (l->texture[i].type) {
 259         case Text:
 260             if (!transferred) {
 261                 transferred = 1;
 262                 if (l->surface.data.planar.grad != Background_Solid)
 263                     pixel32_to_pixmap(l->surface.data.planar.pixel_data,
 264                                       l->pixmap,x,y,w,h);
 265             }
 266             if (l->xftdraw == NULL) {
 267                 l->xftdraw = XftDrawCreate(ob_display, l->pixmap,
 268                                         render_visual, render_colormap);
 269             }
 270             font_draw(l->xftdraw, &l->texture[i].data.text,
 271                       &tarea);
 272         break;
 273         case Bitmask:
 274             if (!transferred) {
 275                 transferred = 1;
 276                 if (l->surface.data.planar.grad != Background_Solid)
 277                     pixel32_to_pixmap(l->surface.data.planar.pixel_data,
 278                                       l->pixmap,x,y,w,h);
 279             }
 280             if (l->texture[i].data.mask.color->gc == None)
 281                 color_allocate_gc(l->texture[i].data.mask.color);
 282             mask_draw(l->pixmap, &l->texture[i].data.mask,
 283                       &tarea);
 284         break;
 285         case RGBA:
 286             image_draw(l->surface.data.planar.pixel_data,
 287                        &l->texture[i].data.rgba,
 288                        &tarea, &l->area);
 289         break;
 290         }
 291     }
 292
 293     if (!transferred) {
 294         transferred = 1;
 295         if (l->surface.data.planar.grad != Background_Solid)
 296             pixel32_to_pixmap(l->surface.data.planar.pixel_data, l->pixmap
 297                               ,x,y,w,h);
 298     }
 299
 300
 301     XSetWindowBackgroundPixmap(ob_display, win, l->pixmap);
 302     XClearWindow(ob_display, win);
 303     if (oldp != None) XFreePixmap(ob_display, oldp);
 304 }
 305
 306 /*
 307 void gl_paint(Window win, Appearance *l)
 308 {
 309     glXMakeCurrent(ob_display, win, gl_context);
 310 }
 311 */
 312
 313 void render_shutdown(void)
 314 {
 315 }
 316
 317 Appearance *appearance_new(SurfaceType type, int numtex)
 318 {
 319   PlanarSurface *p;
 320   Appearance *out;
 321
 322   out = g_new(Appearance, 1);
 323   out->surface.type = type;
 324   out->textures = numtex;
 325   out->xftdraw = NULL;
 326   if (numtex) out->texture = g_new0(Texture, numtex);
 327   else out->texture = NULL;
 328   out->pixmap = None;
 329
 330   switch (type) {
 331   case Surface_Planar:
 332     p = &out->surface.data.planar;
 333     p->primary = NULL;
 334     p->secondary = NULL;
 335     p->border_color = NULL;
 336     p->pixel_data = NULL;
 337     break;
 338   }
 339   return out;
 340 }
 341
 342 Appearance *appearance_copy(Appearance *orig)
 343 {
 344     PlanarSurface *spo, *spc;
 345     Appearance *copy = g_new(Appearance, 1);
 346     copy->surface.type = orig->surface.type;
 347     switch (orig->surface.type) {
 348     case Surface_Planar:
 349         spo = &(orig->surface.data.planar);
 350         spc = &(copy->surface.data.planar);
 351         spc->grad = spo->grad;
 352         spc->relief = spo->relief;
 353         spc->bevel = spo->bevel;
 354         if (spo->primary != NULL)
 355             spc->primary = color_new(spo->primary->r,
 356                                      spo->primary->g,
 357                                      spo->primary->b);
 358         else spc->primary = NULL;
 359
 360         if (spo->secondary != NULL)
 361             spc->secondary = color_new(spo->secondary->r,
 362                                        spo->secondary->g,
 363                                        spo->secondary->b);
 364         else spc->secondary = NULL;
 365
 366         if (spo->border_color != NULL)
 367             spc->border_color = color_new(spo->border_color->r,
 368                                           spo->border_color->g,
 369                                           spo->border_color->b);
 370         else spc->border_color = NULL;
 371
 372         spc->interlaced = spo->interlaced;
 373         spc->border = spo->border;
 374         spc->pixel_data = NULL;
 375     break;
 376     }
 377     copy->textures = orig->textures;
 378     copy->texture = g_memdup(orig->texture, orig->textures * sizeof(Texture));
 379     copy->pixmap = None;
 380     copy->xftdraw = NULL;
 381     return copy;
 382 }
 383
 384 void appearance_free(Appearance *a)
 385 {
 386     if (a) {
 387         PlanarSurface *p;
 388         if (a->pixmap != None) XFreePixmap(ob_display, a->pixmap);
 389         if (a->xftdraw != NULL) XftDrawDestroy(a->xftdraw);
 390         if (a->textures)
 391             g_free(a->texture);
 392         if (a->surface.type == Surface_Planar) {
 393             p = &a->surface.data.planar;
 394             if (p->primary != NULL) color_free(p->primary);
 395             if (p->secondary != NULL) color_free(p->secondary);
 396             if (p->border_color != NULL) color_free(p->border_color);
 397             if (p->pixel_data != NULL) g_free(p->pixel_data);
 398         }
 399         g_free(a);
 400     }
 401 }
 402
 403
 404 void pixel32_to_pixmap(pixel32 *in, Pixmap out, int x, int y, int w, int h)
 405 {
 406     pixel32 *scratch;
 407     XImage *im = NULL;
 408     im = XCreateImage(ob_display, render_visual, render_depth,
 409                       ZPixmap, 0, NULL, w, h, 32, 0);
 410     g_assert(im != NULL);
 411     im->byte_order = render_endian;
 412 /* this malloc is a complete waste of time on normal 32bpp
 413    as reduce_depth just sets im->data = data and returns
 414 */
 415     scratch = g_new(pixel32, im->width * im->height);
 416     im->data = (char*) scratch;
 417     reduce_depth(in, im);
 418     XPutImage(ob_display, out, DefaultGC(ob_display, ob_screen),
 419               im, 0, 0, x, y, w, h);
 420     im->data = NULL;
 421     XDestroyImage(im);
 422     g_free(scratch);
 423 }
 424
 425 void appearance_minsize(Appearance *l, int *w, int *h)
 426 {
 427     int i;
 428     int m;
 429     *w = *h = 1;
 430
 431     switch (l->surface.type) {
 432     case Surface_Planar:
 433         if (l->surface.data.planar.relief != Flat) {
 434             switch (l->surface.data.planar.bevel) {
 435             case Bevel1:
 436                 *w = *h = 2;
 437                 break;
 438             case Bevel2:
 439                 *w = *h = 4;
 440                 break;
 441             }
 442         } else if (l->surface.data.planar.border)
 443             *w = *h = 2;
 444
 445         for (i = 0; i < l->textures; ++i) {
 446             switch (l->texture[i].type) {
 447             case Bitmask:
 448                 *w += l->texture[i].data.mask.mask->w;
 449                 *h += l->texture[i].data.mask.mask->h;
 450                 break;
 451             case Text:
 452                 m = font_measure_string(l->texture[i].data.text.font,
 453                                         l->texture[i].data.text.string,
 454                                         l->texture[i].data.text.shadow,
 455                                         l->texture[i].data.text.offset);
 456                 *w += m;
 457                 m = font_height(l->texture[i].data.text.font,
 458                                 l->texture[i].data.text.shadow,
 459                                 l->texture[i].data.text.offset);
 460                 *h += m;
 461                 break;
 462             case RGBA:
 463                 *w += l->texture[i].data.rgba.width;
 464                 *h += l->texture[i].data.rgba.height;
 465                 break;
 466             case NoTexture:
 467                 break;
 468             }
 469         }
 470         break;
 471     }
 472 }
 473
 474 gboolean render_pixmap_to_rgba(Pixmap pmap, Pixmap mask,
 475                                int *w, int *h, pixel32 **data)
 476 {
 477     Window xr;
 478     int xx, xy;
 479     guint pw, ph, mw, mh, xb, xd, i, x, y, di;
 480     XImage *xi, *xm = NULL;
 481
 482     if (!XGetGeometry(ob_display, pmap, &xr, &xx, &xy, &pw, &ph, &xb, &xd))
 483         return FALSE;
 484     if (mask) {
 485         if (!XGetGeometry(ob_display, mask, &xr, &xx, &xy, &mw, &mh, &xb, &xd))
 486             return FALSE;
 487         if (pw != mw || ph != mh || xd != 1)
 488             return FALSE;
 489     }
 490
 491     xi = XGetImage(ob_display, pmap, 0, 0, pw, ph, 0xffffffff, ZPixmap);
 492     if (!xi)
 493         return FALSE;
 494
 495     if (mask) {
 496         xm = XGetImage(ob_display, mask, 0, 0, mw, mh, 0xffffffff, ZPixmap);
 497         if (!xm)
 498             return FALSE;
 499     }
 500
 501     *data = g_new(pixel32, pw * ph);
 502     increase_depth(*data, xi);
 503
 504     if (mask) {
 505         /* apply transparency from the mask */
 506         di = 0;
 507         for (i = 0, y = 0; y < ph; ++y) {
 508             for (x = 0; x < pw; ++x, ++i) {
 509                 if (!((((unsigned)xm->data[di + x / 8]) >> (x % 8)) & 0x1))
 510                     (*data)[i] &= ~(0xff << default_alpha_offset);
 511             }
 512             di += xm->bytes_per_line;
 513         }
 514     }
 515
 516     *w = pw;
 517     *h = ph;
 518
 519     return TRUE;
 520 }