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