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