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 #ifndef 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
 201     if (w <= 0 || h <= 0 || x+w <= 0 || y+h <= 0) return;
 202
 203     g_assert(l->surface.type == Surface_Planar);
 204
 205     oldp = l->pixmap; /* save to free after changing the visible pixmap */
 206     l->pixmap = XCreatePixmap(ob_display, ob_root, x+w, y+h, render_depth);
 207     g_assert(l->pixmap != None);
 208
 209     if (l->xftdraw != NULL)
 210         XftDrawDestroy(l->xftdraw);
 211     l->xftdraw = XftDrawCreate(ob_display, l->pixmap, render_visual,
 212                                render_colormap);
 213     g_assert(l->xftdraw != NULL);
 214
 215     g_free(l->surface.data.planar.pixel_data);
 216     l->surface.data.planar.pixel_data = g_new(pixel32, w * h);
 217
 218
 219     if (l->surface.data.planar.grad == Background_ParentRelative) {
 220         sw = l->surface.data.planar.parent->area.width;
 221         source = l->surface.data.planar.parent->surface.data.planar.pixel_data
 222             + l->surface.data.planar.parentx
 223             + sw * l->surface.data.planar.parenty;
 224         dest = l->surface.data.planar.pixel_data;
 225         for (i = 0; i < h; i++, source += sw, dest += w) {
 226             memcpy(dest, source, w * sizeof(pixel32));
 227         }
 228     }
 229     else if (l->surface.data.planar.grad == Background_Solid)
 230         gradient_solid(l, x, y, w, h);
 231     else gradient_render(&l->surface, w, h);
 232
 233     for (i = 0; i < l->textures; i++) {
 234         switch (l->texture[i].type) {
 235         case Text:
 236             if (!transferred) {
 237                 transferred = 1;
 238                 if (l->surface.data.planar.grad != Background_Solid)
 239                     pixel32_to_pixmap(l->surface.data.planar.pixel_data,
 240                                       l->pixmap,x,y,w,h);
 241             }
 242             if (l->xftdraw == NULL) {
 243                 l->xftdraw = XftDrawCreate(ob_display, l->pixmap,
 244                                         render_visual, render_colormap);
 245             }
 246             font_draw(l->xftdraw, &l->texture[i].data.text,
 247                       &l->texture[i].position);
 248         break;
 249         case Bitmask:
 250             if (!transferred) {
 251                 transferred = 1;
 252                 if (l->surface.data.planar.grad != Background_Solid)
 253                     pixel32_to_pixmap(l->surface.data.planar.pixel_data,
 254                                       l->pixmap,x,y,w,h);
 255             }
 256             if (l->texture[i].data.mask.color->gc == None)
 257                 color_allocate_gc(l->texture[i].data.mask.color);
 258             mask_draw(l->pixmap, &l->texture[i].data.mask,
 259                       &l->texture[i].position);
 260         break;
 261         case RGBA:
 262             image_draw(l->surface.data.planar.pixel_data,
 263                        &l->texture[i].data.rgba,
 264                        &l->texture[i].position);
 265         break;
 266         }
 267     }
 268
 269     if (!transferred) {
 270         transferred = 1;
 271         if (l->surface.data.planar.grad != Background_Solid)
 272             pixel32_to_pixmap(l->surface.data.planar.pixel_data, l->pixmap
 273                               ,x,y,w,h);
 274     }
 275
 276
 277     XSetWindowBackgroundPixmap(ob_display, win, l->pixmap);
 278     XClearWindow(ob_display, win);
 279     if (oldp != None) XFreePixmap(ob_display, oldp);
 280 }
 281
 282 /*
 283 void gl_paint(Window win, Appearance *l)
 284 {
 285     glXMakeCurrent(ob_display, win, gl_context);
 286 }
 287 */
 288
 289 void render_shutdown(void)
 290 {
 291 }
 292
 293 Appearance *appearance_new(SurfaceType type, int numtex)
 294 {
 295   PlanarSurface *p;
 296   Appearance *out;
 297
 298   out = g_new(Appearance, 1);
 299   out->surface.type = type;
 300   out->textures = numtex;
 301   out->xftdraw = NULL;
 302   if (numtex) out->texture = g_new0(Texture, numtex);
 303   else out->texture = NULL;
 304   out->pixmap = None;
 305
 306   switch (type) {
 307   case Surface_Planar:
 308     p = &out->surface.data.planar;
 309     p->primary = NULL;
 310     p->secondary = NULL;
 311     p->border_color = NULL;
 312     p->pixel_data = NULL;
 313     break;
 314   }
 315   return out;
 316 }
 317
 318 Appearance *appearance_copy(Appearance *orig)
 319 {
 320     PlanarSurface *spo, *spc;
 321     Appearance *copy = g_new(Appearance, 1);
 322     copy->surface.type = orig->surface.type;
 323     switch (orig->surface.type) {
 324     case Surface_Planar:
 325         spo = &(orig->surface.data.planar);
 326         spc = &(copy->surface.data.planar);
 327         spc->grad = spo->grad;
 328         spc->relief = spo->relief;
 329         spc->bevel = spo->bevel;
 330         if (spo->primary != NULL)
 331             spc->primary = color_new(spo->primary->r,
 332                                      spo->primary->g,
 333                                      spo->primary->b);
 334         else spc->primary = NULL;
 335
 336         if (spo->secondary != NULL)
 337             spc->secondary = color_new(spo->secondary->r,
 338                                        spo->secondary->g,
 339                                        spo->secondary->b);
 340         else spc->secondary = NULL;
 341
 342         if (spo->border_color != NULL)
 343             spc->border_color = color_new(spo->border_color->r,
 344                                           spo->border_color->g,
 345                                           spo->border_color->b);
 346         else spc->border_color = NULL;
 347
 348         spc->interlaced = spo->interlaced;
 349         spc->border = spo->border;
 350         spc->pixel_data = NULL;
 351     break;
 352     }
 353     copy->textures = orig->textures;
 354     copy->texture = g_memdup(orig->texture, orig->textures * sizeof(Texture));
 355     copy->pixmap = None;
 356     copy->xftdraw = NULL;
 357     return copy;
 358 }
 359
 360 void appearance_free(Appearance *a)
 361 {
 362     PlanarSurface *p;
 363     if (a->pixmap != None) XFreePixmap(ob_display, a->pixmap);
 364     if (a->xftdraw != NULL) XftDrawDestroy(a->xftdraw);
 365     if (a->textures)
 366         g_free(a->texture);
 367     if (a->surface.type == Surface_Planar) {
 368         p = &a->surface.data.planar;
 369         if (p->primary != NULL) color_free(p->primary);
 370         if (p->secondary != NULL) color_free(p->secondary);
 371         if (p->border_color != NULL) color_free(p->border_color);
 372         if (p->pixel_data != NULL) g_free(p->pixel_data);
 373     }
 374     g_free(a);
 375 }
 376
 377
 378 void pixel32_to_pixmap(pixel32 *in, Pixmap out, int x, int y, int w, int h)
 379 {
 380     XImage *im = NULL;
 381     im = XCreateImage(ob_display, render_visual, render_depth,
 382                       ZPixmap, 0, NULL, w, h, 32, 0);
 383     g_assert(im != NULL);
 384     im->byte_order = endian;
 385     im->data = (char *)in;
 386     reduce_depth((pixel32*)im->data, im);
 387     XPutImage(ob_display, out, DefaultGC(ob_display, ob_screen),
 388               im, 0, 0, x, y, w, h);
 389     im->data = NULL;
 390     XDestroyImage(im);
 391 }
 392
 393 void appearance_minsize(Appearance *l, Size *s)
 394 {
 395     int i;
 396     SIZE_SET(*s, 0, 0);
 397
 398     switch (l->surface.type) {
 399     case Surface_Planar:
 400         if (l->surface.data.planar.border ||
 401             l->surface.data.planar.bevel == Bevel1)
 402             SIZE_SET(*s, 2, 2);
 403         else if (l->surface.data.planar.bevel == Bevel2)
 404             SIZE_SET(*s, 4, 4);
 405
 406         for (i = 0; i < l->textures; ++i)
 407             switch (l->texture[i].type) {
 408             case Bitmask:
 409                 s->width += l->texture[i].data.mask.mask->w;
 410                 s->height += l->texture[i].data.mask.mask->h;
 411                 break;
 412             case Text:
 413                 s->width +=font_measure_string(l->texture[i].data.text.font,
 414                                                l->texture[i].data.text.string,
 415                                                l->texture[i].data.text.shadow,
 416                                                l->texture[i].data.text.offset);
 417                 s->height +=  font_height(l->texture[i].data.text.font,
 418                                           l->texture[i].data.text.shadow,
 419                                           l->texture[i].data.text.offset);
 420                 break;
 421             case RGBA:
 422                 s->width += l->texture[i].data.rgba.width;
 423                 s->height += l->texture[i].data.rgba.height;
 424                 break;
 425             case NoTexture:
 426                 break;
 427             }
 428         break;
 429     }
 430     return s;
 431 }