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->ref = 1;
 208   out->textures = numtex;
 209   out->surface.bevel_light_adjust = 128;
 210   out->surface.bevel_dark_adjust = 64;
 211   if (numtex) out->texture = g_new0(RrTexture, numtex);
 212
 213   return out;
 214 }
 215
 216 void RrAppearanceRemoveTextures(RrAppearance *a)
 217 {
 218     g_free(a->texture);
 219     a->textures = 0;
 220 }
 221
 222 void RrAppearanceAddTextures(RrAppearance *a, gint numtex)
 223 {
 224     g_assert(a->textures == 0);
 225
 226     a->textures = numtex;
 227     if (numtex) a->texture = g_new0(RrTexture, numtex);
 228 }
 229
 230 void RrAppearanceClearTextures(RrAppearance *a)
 231 {
 232     memset(a->texture, 0, a->textures * sizeof(RrTexture));
 233 }
 234
 235 /* shallow copy means up the ref count and return it */
 236 RrAppearance *RrAppearanceCopyShallow(RrAppearance *orig)
 237 {
 238     orig->ref++;
 239     return orig;
 240 }
 241
 242 /* deep copy of orig, means reset ref to 1 on copy
 243  * and copy each thing memwise. */
 244 RrAppearance *RrAppearanceCopy(RrAppearance *orig)
 245 {
 246     RrSurface *spo, *spc;
 247     RrAppearance *copy = g_slice_new(RrAppearance);
 248
 249     copy->inst = orig->inst;
 250     copy->ref = 1;
 251
 252     spo = &(orig->surface);
 253     spc = &(copy->surface);
 254     spc->grad = spo->grad;
 255     spc->relief = spo->relief;
 256     spc->bevel = spo->bevel;
 257     if (spo->primary != NULL)
 258         spc->primary = RrColorNew(copy->inst,
 259                                   spo->primary->r,
 260                                   spo->primary->g,
 261                                   spo->primary->b);
 262     else spc->primary = NULL;
 263
 264     if (spo->secondary != NULL)
 265         spc->secondary = RrColorNew(copy->inst,
 266                                     spo->secondary->r,
 267                                     spo->secondary->g,
 268                                     spo->secondary->b);
 269     else spc->secondary = NULL;
 270
 271     if (spo->border_color != NULL)
 272         spc->border_color = RrColorNew(copy->inst,
 273                                        spo->border_color->r,
 274                                        spo->border_color->g,
 275                                        spo->border_color->b);
 276     else spc->border_color = NULL;
 277
 278     if (spo->interlace_color != NULL)
 279         spc->interlace_color = RrColorNew(copy->inst,
 280                                        spo->interlace_color->r,
 281                                        spo->interlace_color->g,
 282                                        spo->interlace_color->b);
 283     else spc->interlace_color = NULL;
 284
 285     if (spo->bevel_dark != NULL)
 286         spc->bevel_dark = RrColorNew(copy->inst,
 287                                      spo->bevel_dark->r,
 288                                      spo->bevel_dark->g,
 289                                      spo->bevel_dark->b);
 290     else spc->bevel_dark = NULL;
 291
 292     if (spo->bevel_light != NULL)
 293         spc->bevel_light = RrColorNew(copy->inst,
 294                                       spo->bevel_light->r,
 295                                       spo->bevel_light->g,
 296                                       spo->bevel_light->b);
 297     else spc->bevel_light = NULL;
 298
 299     if (spo->split_primary != NULL)
 300         spc->split_primary = RrColorNew(copy->inst,
 301                                         spo->split_primary->r,
 302                                         spo->split_primary->g,
 303                                         spo->split_primary->b);
 304     else spc->split_primary = NULL;
 305
 306     if (spo->split_secondary != NULL)
 307         spc->split_secondary = RrColorNew(copy->inst,
 308                                         spo->split_secondary->r,
 309                                         spo->split_secondary->g,
 310                                         spo->split_secondary->b);
 311     else spc->split_secondary = NULL;
 312
 313     spc->interlaced = spo->interlaced;
 314     spc->bevel_light_adjust = spo->bevel_light_adjust;
 315     spc->bevel_dark_adjust = spo->bevel_dark_adjust;
 316     spc->border = spo->border;
 317     spc->parent = NULL;
 318     spc->parentx = spc->parenty = 0;
 319     spc->pixel_data = NULL;
 320
 321     copy->textures = orig->textures;
 322     copy->texture = g_memdup(orig->texture,
 323                              orig->textures * sizeof(RrTexture));
 324     copy->pixmap = None;
 325     copy->xftdraw = NULL;
 326     copy->w = copy->h = 0;
 327     return copy;
 328 }
 329
 330 /* now decrements ref counter, and frees only if ref <= 0 */
 331 void RrAppearanceFree(RrAppearance *a)
 332 {
 333     if (a) {
 334         RrSurface *p;
 335         if (a->pixmap != None) XFreePixmap(RrDisplay(a->inst), a->pixmap);
 336         if (a->xftdraw != NULL) XftDrawDestroy(a->xftdraw);
 337         if (a->textures)
 338             g_free(a->texture);
 339         p = &a->surface;
 340         RrColorFree(p->primary);
 341         RrColorFree(p->secondary);
 342         RrColorFree(p->border_color);
 343         RrColorFree(p->interlace_color);
 344         RrColorFree(p->bevel_dark);
 345         RrColorFree(p->bevel_light);
 346         RrColorFree(p->split_primary);
 347         RrColorFree(p->split_secondary);
 348         g_free(p->pixel_data);
 349         p->pixel_data = NULL;
 350         g_slice_free(RrAppearance, a);
 351     }
 352 }
 353
 354 static void pixel_data_to_pixmap(RrAppearance *l,
 355                                  gint x, gint y, gint w, gint h)
 356 {
 357     RrPixel32 *in, *scratch;
 358     Pixmap out;
 359     XImage *im = NULL;
 360     im = XCreateImage(RrDisplay(l->inst), RrVisual(l->inst), RrDepth(l->inst),
 361                       ZPixmap, 0, NULL, w, h, 32, 0);
 362     g_assert(im != NULL);
 363
 364     in = l->surface.pixel_data;
 365     out = l->pixmap;
 366
 367 /* this malloc is a complete waste of time on normal 32bpp
 368    as reduce_depth just sets im->data = data and returns
 369 */
 370     scratch = g_new(RrPixel32, im->width * im->height);
 371     im->data = (gchar*) scratch;
 372     RrReduceDepth(l->inst, in, im);
 373     XPutImage(RrDisplay(l->inst), out,
 374               DefaultGC(RrDisplay(l->inst), RrScreen(l->inst)),
 375               im, 0, 0, x, y, w, h);
 376     im->data = NULL;
 377     XDestroyImage(im);
 378     g_free(scratch);
 379 }
 380
 381 void RrMargins (RrAppearance *a, gint *l, gint *t, gint *r, gint *b)
 382 {
 383     *l = *t = *r = *b = 0;
 384
 385     if (a->surface.grad != RR_SURFACE_PARENTREL) {
 386         if (a->surface.relief != RR_RELIEF_FLAT) {
 387             switch (a->surface.bevel) {
 388             case RR_BEVEL_1:
 389                 *l = *t = *r = *b = 1;
 390                 break;
 391             case RR_BEVEL_2:
 392                 *l = *t = *r = *b = 2;
 393                 break;
 394             case RR_BEVEL_NUM_TYPES:
 395                 g_assert_not_reached();
 396             }
 397         } else if (a->surface.border) {
 398             *l = *t = *r = *b = 1;
 399         }
 400     }
 401 }
 402
 403 void RrMinSize(RrAppearance *a, gint *w, gint *h)
 404 {
 405     *w = RrMinWidth(a);
 406     *h = RrMinHeight(a);
 407 }
 408
 409 gint RrMinWidth(RrAppearance *a)
 410 {
 411     gint i;
 412     RrSize *m;
 413     gint l, t, r, b;
 414     gint w = 0;
 415
 416     RrMargins(a, &l, &t, &r, &b);
 417
 418     for (i = 0; i < a->textures; ++i) {
 419         switch (a->texture[i].type) {
 420         case RR_TEXTURE_NONE:
 421             break;
 422         case RR_TEXTURE_MASK:
 423             w = MAX(w, a->texture[i].data.mask.mask->width);
 424             break;
 425         case RR_TEXTURE_TEXT:
 426             m = RrFontMeasureString(a->texture[i].data.text.font,
 427                                     a->texture[i].data.text.string,
 428                                     a->texture[i].data.text.shadow_offset_x,
 429                                     a->texture[i].data.text.shadow_offset_y,
 430                                     a->texture[i].data.text.flow,
 431                                     a->texture[i].data.text.maxwidth);
 432             w = MAX(w, m->width);
 433             g_slice_free(RrSize, m);
 434             break;
 435         case RR_TEXTURE_RGBA:
 436             w += MAX(w, a->texture[i].data.rgba.width);
 437             break;
 438         case RR_TEXTURE_IMAGE:
 439             /* images resize so they don't contribute anything to the min */
 440             break;
 441         case RR_TEXTURE_LINE_ART:
 442             w = MAX(w, MAX(a->texture[i].data.lineart.x1 - l - r,
 443                            a->texture[i].data.lineart.x2 - l - r));
 444             break;
 445         case RR_TEXTURE_NUM_TYPES:
 446             g_assert_not_reached();
 447         }
 448     }
 449
 450     w += l + r;
 451
 452     if (w < 1) w = 1;
 453     return w;
 454 }
 455
 456 gint RrMinHeight(RrAppearance *a)
 457 {
 458     gint i;
 459     gint l, t, r, b;
 460     RrSize *m;
 461     gint h = 0;
 462
 463     RrMargins(a, &l, &t, &r, &b);
 464
 465     for (i = 0; i < a->textures; ++i) {
 466         switch (a->texture[i].type) {
 467         case RR_TEXTURE_NONE:
 468             break;
 469         case RR_TEXTURE_MASK:
 470             h = MAX(h, a->texture[i].data.mask.mask->height);
 471             break;
 472         case RR_TEXTURE_TEXT:
 473             if (a->texture[i].data.text.flow) {
 474                 g_assert(a->texture[i].data.text.string != NULL);
 475
 476                 m = RrFontMeasureString
 477                     (a->texture[i].data.text.font,
 478                      a->texture[i].data.text.string,
 479                      a->texture[i].data.text.shadow_offset_x,
 480                      a->texture[i].data.text.shadow_offset_y,
 481                      a->texture[i].data.text.flow,
 482                      a->texture[i].data.text.maxwidth);
 483                 h += MAX(h, m->height);
 484                 g_slice_free(RrSize, m);
 485             }
 486             else
 487                 h += MAX(h,
 488                          RrFontHeight
 489                          (a->texture[i].data.text.font,
 490                           a->texture[i].data.text.shadow_offset_y));
 491             break;
 492         case RR_TEXTURE_RGBA:
 493             h += MAX(h, a->texture[i].data.rgba.height);
 494             break;
 495         case RR_TEXTURE_IMAGE:
 496             /* images resize so they don't contribute anything to the min */
 497             break;
 498         case RR_TEXTURE_LINE_ART:
 499             h = MAX(h, MAX(a->texture[i].data.lineart.y1 - t - b,
 500                            a->texture[i].data.lineart.y2 - t - b));
 501             break;
 502         case RR_TEXTURE_NUM_TYPES:
 503             g_assert_not_reached();
 504         }
 505     }
 506
 507     h += t + b;
 508
 509     if (h < 1) h = 1;
 510     return h;
 511 }
 512
 513 static void reverse_bits(gchar *c, gint n)
 514 {
 515     gint i;
 516     for (i = 0; i < n; i++, c++)
 517         *c = (((*c * 0x0802UL & 0x22110UL) |
 518                (*c * 0x8020UL & 0x88440UL)) * 0x10101UL) >> 16;
 519 }
 520
 521 gboolean RrPixmapToRGBA(const RrInstance *inst,
 522                         Pixmap pmap, Pixmap mask,
 523                         gint *w, gint *h, RrPixel32 **data)
 524 {
 525     Window xr;
 526     gint xx, xy;
 527     guint pw, ph, mw, mh, xb, xd, i, x, y, di;
 528     XImage *xi, *xm = NULL;
 529
 530     if (!XGetGeometry(RrDisplay(inst), pmap,
 531                       &xr, &xx, &xy, &pw, &ph, &xb, &xd))
 532         return FALSE;
 533
 534     if (mask) {
 535         if (!XGetGeometry(RrDisplay(inst), mask,
 536                           &xr, &xx, &xy, &mw, &mh, &xb, &xd))
 537             return FALSE;
 538         if (pw != mw || ph != mh || xd != 1)
 539             return FALSE;
 540     }
 541
 542     xi = XGetImage(RrDisplay(inst), pmap,
 543                    0, 0, pw, ph, 0xffffffff, ZPixmap);
 544     if (!xi)
 545         return FALSE;
 546
 547     if (mask) {
 548         xm = XGetImage(RrDisplay(inst), mask,
 549                        0, 0, mw, mh, 0xffffffff, ZPixmap);
 550         if (!xm) {
 551             XDestroyImage(xi);
 552             return FALSE;
 553         }
 554         if ((xm->bits_per_pixel == 1) && (xm->bitmap_bit_order != LSBFirst))
 555             reverse_bits(xm->data, xm->bytes_per_line * xm->height);
 556     }
 557
 558     if ((xi->bits_per_pixel == 1) && (xi->bitmap_bit_order != LSBFirst))
 559         reverse_bits(xi->data, xi->bytes_per_line * xi->height);
 560
 561     *data = g_new(RrPixel32, pw * ph);
 562     RrIncreaseDepth(inst, *data, xi);
 563
 564     if (mask) {
 565         /* apply transparency from the mask */
 566         di = 0;
 567         for (i = 0, y = 0; y < ph; ++y) {
 568             for (x = 0; x < pw; ++x, ++i) {
 569                 if (!((((unsigned)xm->data[di + x / 8]) >> (x % 8)) & 0x1))
 570                     (*data)[i] &= ~(0xff << RrDefaultAlphaOffset);
 571             }
 572             di += xm->bytes_per_line;
 573         }
 574     }
 575
 576     *w = pw;
 577     *h = ph;
 578
 579     XDestroyImage(xi);
 580     if (mask)
 581         XDestroyImage(xm);
 582
 583     return TRUE;
 584 }