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