obrender/render.c

   1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
   2
   3    render.c for the Openbox window manager
   4    Copyright (c) 2006        Mikael Magnusson
   5    Copyright (c) 2003-2007   Dana Jansens
   6    Copyright (c) 2003        Derek Foreman
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    See the COPYING file for a copy of the GNU General Public License.
  19 */
  20
  21 #include "render.h"
  22 #include "gradient.h"
  23 #include "font.h"
  24 #include "mask.h"
  25 #include "color.h"
  26 #include "image.h"
  27 #include "theme.h"
  28
  29 #include <glib.h>
  30 #include <X11/Xlib.h>
  31 #include <X11/Xutil.h>
  32 #include <X11/Xft/Xft.h>
  33
  34 #ifdef HAVE_STDLIB_H
  35 #  include <stdlib.h>
  36 #endif
  37
  38 static void pixel_data_to_pixmap(RrAppearance *l,
  39                                  gint x, gint y, gint w, gint h);
  40
  41 Pixmap RrPaintPixmap(RrAppearance *a, gint w, gint h)
  42 {
  43     gint i, transferred = 0, force_transfer = 0;
  44     Pixmap oldp = None;
  45     RrRect tarea; /* area in which to draw textures */
  46     gboolean resized;
  47
  48     if (w <= 0 || h <= 0) return None;
  49
  50     if (a->surface.parentx < 0 || a->surface.parenty < 0) {
  51         /* ob_debug("Invalid parent co-ordinates\n"); */
  52         return None;
  53     }
  54
  55     if (a->surface.grad == RR_SURFACE_PARENTREL &&
  56         (a->surface.parentx >= a->surface.parent->w ||
  57          a->surface.parenty >= a->surface.parent->h))
  58     {
  59         return None;
  60     }
  61
  62     resized = (a->w != w || a->h != h);
  63
  64     oldp = a->pixmap; /* save to free after changing the visible pixmap */
  65     a->pixmap = XCreatePixmap(RrDisplay(a->inst),
  66                               RrRootWindow(a->inst),
  67                               w, h, RrDepth(a->inst));
  68
  69     g_assert(a->pixmap != None);
  70     a->w = w;
  71     a->h = h;
  72
  73     if (a->xftdraw != NULL)
  74         XftDrawDestroy(a->xftdraw);
  75     a->xftdraw = XftDrawCreate(RrDisplay(a->inst), a->pixmap,
  76                                RrVisual(a->inst), RrColormap(a->inst));
  77     g_assert(a->xftdraw != NULL);
  78
  79     if (resized) {
  80         g_free(a->surface.pixel_data);
  81         a->surface.pixel_data = g_new(RrPixel32, w * h);
  82     }
  83
  84     RrRender(a, w, h);
  85
  86     {
  87         gint l, t, r, b;
  88         RrMargins(a, &l, &t, &r, &b);
  89         RECT_SET(tarea, l, t, w - l - r, h - t - b);
  90     }
  91
  92     for (i = 0; i < a->textures; i++) {
  93         switch (a->texture[i].type) {
  94         case RR_TEXTURE_NONE:
  95             break;
  96         case RR_TEXTURE_TEXT:
  97             if (!transferred) {
  98                 transferred = 1;
  99                 if ((a->surface.grad != RR_SURFACE_SOLID)
 100                     || (a->surface.interlaced))
 101                     pixel_data_to_pixmap(a, 0, 0, w, h);
 102             }
 103             if (a->xftdraw == NULL) {
 104                 a->xftdraw = XftDrawCreate(RrDisplay(a->inst), a->pixmap,
 105                                            RrVisual(a->inst),
 106                                            RrColormap(a->inst));
 107             }
 108             RrFontDraw(a->xftdraw, &a->texture[i].data.text, &tarea);
 109             break;
 110         case RR_TEXTURE_LINE_ART:
 111             if (!transferred) {
 112                 transferred = 1;
 113                 if ((a->surface.grad != RR_SURFACE_SOLID)
 114                     || (a->surface.interlaced))
 115                     pixel_data_to_pixmap(a, 0, 0, w, h);
 116             }
 117             XDrawLine(RrDisplay(a->inst), a->pixmap,
 118                       RrColorGC(a->texture[i].data.lineart.color),
 119                       a->texture[i].data.lineart.x1,
 120                       a->texture[i].data.lineart.y1,
 121                       a->texture[i].data.lineart.x2,
 122                       a->texture[i].data.lineart.y2);
 123             break;
 124         case RR_TEXTURE_MASK:
 125             if (!transferred) {
 126                 transferred = 1;
 127                 if ((a->surface.grad != RR_SURFACE_SOLID)
 128                     || (a->surface.interlaced))
 129                     pixel_data_to_pixmap(a, 0, 0, w, h);
 130             }
 131             RrPixmapMaskDraw(a->pixmap, &a->texture[i].data.mask, &tarea);
 132             break;
 133         case RR_TEXTURE_IMAGE:
 134             g_assert(!transferred);
 135             {
 136                 RrRect narea = tarea;
 137                 RrTextureImage *img = &a->texture[i].data.image;
 138                 narea.x += img->tx;
 139                 narea.width -= img->tx;
 140                 narea.y += img->ty;
 141                 narea.height -= img->ty;
 142                 if (img->twidth)
 143                     narea.width = MIN(narea.width, img->twidth);
 144                 if (img->theight)
 145                     narea.height = MIN(narea.height, img->theight);
 146                 RrImageDrawImage(a->surface.pixel_data,
 147                                  &a->texture[i].data.image,
 148                                  a->w, a->h,
 149                                  &narea);
 150             }
 151             force_transfer = 1;
 152             break;
 153         case RR_TEXTURE_RGBA:
 154             g_assert(!transferred);
 155             {
 156                 RrRect narea = tarea;
 157                 RrTextureRGBA *rgb = &a->texture[i].data.rgba;
 158                 narea.x += rgb->tx;
 159                 narea.width -= rgb->tx;
 160                 narea.y += rgb->ty;
 161                 narea.height -= rgb->ty;
 162                 if (rgb->twidth)
 163                     narea.width = MIN(narea.width, rgb->twidth);
 164                 if (rgb->theight)
 165                     narea.height = MIN(narea.height, rgb->theight);
 166                 RrImageDrawRGBA(a->surface.pixel_data,
 167                                 &a->texture[i].data.rgba,
 168                                 a->w, a->h,
 169                                 &narea);
 170             }
 171             force_transfer = 1;
 172         break;
 173         case RR_TEXTURE_NUM_TYPES:
 174             g_assert_not_reached();
 175         }
 176     }
 177
 178     if (!transferred) {
 179         transferred = 1;
 180         if ((a->surface.grad != RR_SURFACE_SOLID) || (a->surface.interlaced) ||
 181             force_transfer)
 182         {
 183             pixel_data_to_pixmap(a, 0, 0, w, h);
 184         }
 185     }
 186
 187     return oldp;
 188 }
 189
 190 void RrPaint(RrAppearance *a, Window win, gint w, gint h)
 191 {
 192     Pixmap oldp;
 193
 194     oldp = RrPaintPixmap(a, w, h);
 195     XSetWindowBackgroundPixmap(RrDisplay(a->inst), win, a->pixmap);
 196     XClearWindow(RrDisplay(a->inst), win);
 197     /* free this after changing the visible pixmap */
 198     if (oldp) XFreePixmap(RrDisplay(a->inst), oldp);
 199 }
 200
 201 RrAppearance *RrAppearanceNew(const RrInstance *inst, gint numtex)
 202 {
 203   RrAppearance *out;
 204
 205   out = g_slice_new0(RrAppearance);
 206   out->inst = inst;
 207   out->textures = numtex;
 208   out->surface.bevel_light_adjust = 128;
 209   out->surface.bevel_dark_adjust = 64;
 210   if (numtex) out->texture = g_new0(RrTexture, numtex);
 211
 212   return out;
 213 }
 214
 215 void RrAppearanceRemoveTextures(RrAppearance *a)
 216 {
 217     g_free(a->texture);
 218     a->textures = 0;
 219 }
 220
 221 void RrAppearanceAddTextures(RrAppearance *a, gint numtex)
 222 {
 223     g_assert(a->textures == 0);
 224
 225     a->textures = numtex;
 226     if (numtex) a->texture = g_new0(RrTexture, numtex);
 227 }
 228
 229 void RrAppearanceClearTextures(RrAppearance *a)
 230 {
 231     memset(a->texture, 0, a->textures * sizeof(RrTexture));
 232 }
 233
 234 RrAppearance *RrAppearanceCopy(RrAppearance *orig)
 235 {
 236     RrSurface *spo, *spc;
 237     RrAppearance *copy = g_slice_new(RrAppearance);
 238
 239     copy->inst = orig->inst;
 240
 241     spo = &(orig->surface);
 242     spc = &(copy->surface);
 243     spc->grad = spo->grad;
 244     spc->relief = spo->relief;
 245     spc->bevel = spo->bevel;
 246     if (spo->primary != NULL)
 247         spc->primary = RrColorNew(copy->inst,
 248                                   spo->primary->r,
 249                                   spo->primary->g,
 250                                   spo->primary->b);
 251     else spc->primary = NULL;
 252
 253     if (spo->secondary != NULL)
 254         spc->secondary = RrColorNew(copy->inst,
 255                                     spo->secondary->r,
 256                                     spo->secondary->g,
 257                                     spo->secondary->b);
 258     else spc->secondary = NULL;
 259
 260     if (spo->border_color != NULL)
 261         spc->border_color = RrColorNew(copy->inst,
 262                                        spo->border_color->r,
 263                                        spo->border_color->g,
 264                                        spo->border_color->b);
 265     else spc->border_color = NULL;
 266
 267     if (spo->interlace_color != NULL)
 268         spc->interlace_color = RrColorNew(copy->inst,
 269                                        spo->interlace_color->r,
 270                                        spo->interlace_color->g,
 271                                        spo->interlace_color->b);
 272     else spc->interlace_color = NULL;
 273
 274     if (spo->bevel_dark != NULL)
 275         spc->bevel_dark = RrColorNew(copy->inst,
 276                                      spo->bevel_dark->r,
 277                                      spo->bevel_dark->g,
 278                                      spo->bevel_dark->b);
 279     else spc->bevel_dark = NULL;
 280
 281     if (spo->bevel_light != NULL)
 282         spc->bevel_light = RrColorNew(copy->inst,
 283                                       spo->bevel_light->r,
 284                                       spo->bevel_light->g,
 285                                       spo->bevel_light->b);
 286     else spc->bevel_light = NULL;
 287
 288     if (spo->split_primary != NULL)
 289         spc->split_primary = RrColorNew(copy->inst,
 290                                         spo->split_primary->r,
 291                                         spo->split_primary->g,
 292                                         spo->split_primary->b);
 293     else spc->split_primary = NULL;
 294
 295     if (spo->split_secondary != NULL)
 296         spc->split_secondary = RrColorNew(copy->inst,
 297                                         spo->split_secondary->r,
 298                                         spo->split_secondary->g,
 299                                         spo->split_secondary->b);
 300     else spc->split_secondary = NULL;
 301
 302     spc->interlaced = spo->interlaced;
 303     spc->bevel_light_adjust = spo->bevel_light_adjust;
 304     spc->bevel_dark_adjust = spo->bevel_dark_adjust;
 305     spc->border = spo->border;
 306     spc->parent = NULL;
 307     spc->parentx = spc->parenty = 0;
 308     spc->pixel_data = NULL;
 309
 310     copy->textures = orig->textures;
 311     copy->texture = g_memdup(orig->texture,
 312                              orig->textures * sizeof(RrTexture));
 313     copy->pixmap = None;
 314     copy->xftdraw = NULL;
 315     copy->w = copy->h = 0;
 316     return copy;
 317 }
 318
 319 void RrAppearanceFree(RrAppearance *a)
 320 {
 321     if (a) {
 322         RrSurface *p;
 323         if (a->pixmap != None) XFreePixmap(RrDisplay(a->inst), a->pixmap);
 324         if (a->xftdraw != NULL) XftDrawDestroy(a->xftdraw);
 325         if (a->textures)
 326             g_free(a->texture);
 327         p = &a->surface;
 328         RrColorFree(p->primary);
 329         RrColorFree(p->secondary);
 330         RrColorFree(p->border_color);
 331         RrColorFree(p->interlace_color);
 332         RrColorFree(p->bevel_dark);
 333         RrColorFree(p->bevel_light);
 334         RrColorFree(p->split_primary);
 335         RrColorFree(p->split_secondary);
 336         g_free(p->pixel_data);
 337         p->pixel_data = NULL;
 338         g_slice_free(RrAppearance, a);
 339     }
 340 }
 341
 342 static void pixel_data_to_pixmap(RrAppearance *l,
 343                                  gint x, gint y, gint w, gint h)
 344 {
 345     RrPixel32 *in, *scratch;
 346     Pixmap out;
 347     XImage *im = NULL;
 348     im = XCreateImage(RrDisplay(l->inst), RrVisual(l->inst), RrDepth(l->inst),
 349                       ZPixmap, 0, NULL, w, h, 32, 0);
 350     g_assert(im != NULL);
 351
 352     in = l->surface.pixel_data;
 353     out = l->pixmap;
 354
 355 /* this malloc is a complete waste of time on normal 32bpp
 356    as reduce_depth just sets im->data = data and returns
 357 */
 358     scratch = g_new(RrPixel32, im->width * im->height);
 359     im->data = (gchar*) scratch;
 360     RrReduceDepth(l->inst, in, im);
 361     XPutImage(RrDisplay(l->inst), out,
 362               DefaultGC(RrDisplay(l->inst), RrScreen(l->inst)),
 363               im, 0, 0, x, y, w, h);
 364     im->data = NULL;
 365     XDestroyImage(im);
 366     g_free(scratch);
 367 }
 368
 369 void RrMargins (RrAppearance *a, gint *l, gint *t, gint *r, gint *b)
 370 {
 371     *l = *t = *r = *b = 0;
 372
 373     if (a->surface.grad != RR_SURFACE_PARENTREL) {
 374         if (a->surface.relief != RR_RELIEF_FLAT) {
 375             switch (a->surface.bevel) {
 376             case RR_BEVEL_1:
 377                 *l = *t = *r = *b = 1;
 378                 break;
 379             case RR_BEVEL_2:
 380                 *l = *t = *r = *b = 2;
 381                 break;
 382             case RR_BEVEL_NUM_TYPES:
 383                 g_assert_not_reached();
 384             }
 385         } else if (a->surface.border) {
 386             *l = *t = *r = *b = 1;
 387         }
 388     }
 389 }
 390
 391 void RrMinSize(RrAppearance *a, gint *w, gint *h)
 392 {
 393     *w = RrMinWidth(a);
 394     *h = RrMinHeight(a);
 395 }
 396
 397 gint RrMinWidth(RrAppearance *a)
 398 {
 399     gint i;
 400     RrSize *m;
 401     gint l, t, r, b;
 402     gint w = 0;
 403
 404     RrMargins(a, &l, &t, &r, &b);
 405
 406     for (i = 0; i < a->textures; ++i) {
 407         switch (a->texture[i].type) {
 408         case RR_TEXTURE_NONE:
 409             break;
 410         case RR_TEXTURE_MASK:
 411             w = MAX(w, a->texture[i].data.mask.mask->width);
 412             break;
 413         case RR_TEXTURE_TEXT:
 414             m = RrFontMeasureString(a->texture[i].data.text.font,
 415                                     a->texture[i].data.text.string,
 416                                     a->texture[i].data.text.shadow_offset_x,
 417                                     a->texture[i].data.text.shadow_offset_y,
 418                                     a->texture[i].data.text.flow,
 419                                     a->texture[i].data.text.maxwidth);
 420             w = MAX(w, m->width);
 421             g_slice_free(RrSize, m);
 422             break;
 423         case RR_TEXTURE_RGBA:
 424             w += MAX(w, a->texture[i].data.rgba.width);
 425             break;
 426         case RR_TEXTURE_IMAGE:
 427             /* images resize so they don't contribute anything to the min */
 428             break;
 429         case RR_TEXTURE_LINE_ART:
 430             w = MAX(w, MAX(a->texture[i].data.lineart.x1 - l - r,
 431                            a->texture[i].data.lineart.x2 - l - r));
 432             break;
 433         case RR_TEXTURE_NUM_TYPES:
 434             g_assert_not_reached();
 435         }
 436     }
 437
 438     w += l + r;
 439
 440     if (w < 1) w = 1;
 441     return w;
 442 }
 443
 444 gint RrMinHeight(RrAppearance *a)
 445 {
 446     gint i;
 447     gint l, t, r, b;
 448     RrSize *m;
 449     gint h = 0;
 450
 451     RrMargins(a, &l, &t, &r, &b);
 452
 453     for (i = 0; i < a->textures; ++i) {
 454         switch (a->texture[i].type) {
 455         case RR_TEXTURE_NONE:
 456             break;
 457         case RR_TEXTURE_MASK:
 458             h = MAX(h, a->texture[i].data.mask.mask->height);
 459             break;
 460         case RR_TEXTURE_TEXT:
 461             if (a->texture[i].data.text.flow) {
 462                 g_assert(a->texture[i].data.text.string != NULL);
 463
 464                 m = RrFontMeasureString
 465                     (a->texture[i].data.text.font,
 466                      a->texture[i].data.text.string,
 467                      a->texture[i].data.text.shadow_offset_x,
 468                      a->texture[i].data.text.shadow_offset_y,
 469                      a->texture[i].data.text.flow,
 470                      a->texture[i].data.text.maxwidth);
 471                 h += MAX(h, m->height);
 472                 g_slice_free(RrSize, m);
 473             }
 474             else
 475                 h += MAX(h,
 476                          RrFontHeight
 477                          (a->texture[i].data.text.font,
 478                           a->texture[i].data.text.shadow_offset_y));
 479             break;
 480         case RR_TEXTURE_RGBA:
 481             h += MAX(h, a->texture[i].data.rgba.height);
 482             break;
 483         case RR_TEXTURE_IMAGE:
 484             /* images resize so they don't contribute anything to the min */
 485             break;
 486         case RR_TEXTURE_LINE_ART:
 487             h = MAX(h, MAX(a->texture[i].data.lineart.y1 - t - b,
 488                            a->texture[i].data.lineart.y2 - t - b));
 489             break;
 490         case RR_TEXTURE_NUM_TYPES:
 491             g_assert_not_reached();
 492         }
 493     }
 494
 495     h += t + b;
 496
 497     if (h < 1) h = 1;
 498     return h;
 499 }
 500
 501 static void reverse_bits(gchar *c, gint n)
 502 {
 503     gint i;
 504     for (i = 0; i < n; i++, c++)
 505         *c = (((*c * 0x0802UL & 0x22110UL) |
 506                (*c * 0x8020UL & 0x88440UL)) * 0x10101UL) >> 16;
 507 }
 508
 509 gboolean RrPixmapToRGBA(const RrInstance *inst,
 510                         Pixmap pmap, Pixmap mask,
 511                         gint *w, gint *h, RrPixel32 **data)
 512 {
 513     Window xr;
 514     gint xx, xy;
 515     guint pw, ph, mw, mh, xb, xd, i, x, y, di;
 516     XImage *xi, *xm = NULL;
 517
 518     if (!XGetGeometry(RrDisplay(inst), pmap,
 519                       &xr, &xx, &xy, &pw, &ph, &xb, &xd))
 520         return FALSE;
 521
 522     if (mask) {
 523         if (!XGetGeometry(RrDisplay(inst), mask,
 524                           &xr, &xx, &xy, &mw, &mh, &xb, &xd))
 525             return FALSE;
 526         if (pw != mw || ph != mh || xd != 1)
 527             return FALSE;
 528     }
 529
 530     xi = XGetImage(RrDisplay(inst), pmap,
 531                    0, 0, pw, ph, 0xffffffff, ZPixmap);
 532     if (!xi)
 533         return FALSE;
 534
 535     if (mask) {
 536         xm = XGetImage(RrDisplay(inst), mask,
 537                        0, 0, mw, mh, 0xffffffff, ZPixmap);
 538         if (!xm) {
 539             XDestroyImage(xi);
 540             return FALSE;
 541         }
 542         if ((xm->bits_per_pixel == 1) && (xm->bitmap_bit_order != LSBFirst))
 543             reverse_bits(xm->data, xm->bytes_per_line * xm->height);
 544     }
 545
 546     if ((xi->bits_per_pixel == 1) && (xi->bitmap_bit_order != LSBFirst))
 547         reverse_bits(xi->data, xi->bytes_per_line * xi->height);
 548
 549     *data = g_new(RrPixel32, pw * ph);
 550     RrIncreaseDepth(inst, *data, xi);
 551
 552     if (mask) {
 553         /* apply transparency from the mask */
 554         di = 0;
 555         for (i = 0, y = 0; y < ph; ++y) {
 556             for (x = 0; x < pw; ++x, ++i) {
 557                 if (!((((unsigned)xm->data[di + x / 8]) >> (x % 8)) & 0x1))
 558                     (*data)[i] &= ~(0xff << RrDefaultAlphaOffset);
 559             }
 560             di += xm->bytes_per_line;
 561         }
 562     }
 563
 564     *w = pw;
 565     *h = ph;
 566
 567     XDestroyImage(xi);
 568     if (mask)
 569         XDestroyImage(xm);
 570
 571     return TRUE;
 572 }