render/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_RGBA:
 134             g_assert(!transferred);
 135             RrImageDraw(a->surface.pixel_data,
 136                         &a->texture[i].data.rgba,
 137                         a->w, a->h,
 138                         &tarea);
 139             force_transfer = 1;
 140         break;
 141         }
 142     }
 143
 144     if (!transferred) {
 145         transferred = 1;
 146         if ((a->surface.grad != RR_SURFACE_SOLID) || (a->surface.interlaced) ||
 147             force_transfer)
 148         {
 149             pixel_data_to_pixmap(a, 0, 0, w, h);
 150         }
 151     }
 152
 153     return oldp;
 154 }
 155
 156 void RrPaint(RrAppearance *a, Window win, gint w, gint h)
 157 {
 158     Pixmap oldp;
 159
 160     oldp = RrPaintPixmap(a, w, h);
 161     XSetWindowBackgroundPixmap(RrDisplay(a->inst), win, a->pixmap);
 162     XClearWindow(RrDisplay(a->inst), win);
 163     /* free this after changing the visible pixmap */
 164     if (oldp) XFreePixmap(RrDisplay(a->inst), oldp);
 165 }
 166
 167 RrAppearance *RrAppearanceNew(const RrInstance *inst, gint numtex)
 168 {
 169   RrAppearance *out;
 170
 171   out = g_new0(RrAppearance, 1);
 172   out->inst = inst;
 173   out->ref = 1;
 174   out->textures = numtex;
 175   out->surface.bevel_light_adjust = 128;
 176   out->surface.bevel_dark_adjust = 64;
 177   if (numtex) out->texture = g_new0(RrTexture, numtex);
 178
 179   return out;
 180 }
 181
 182 void RrAppearanceAddTextures(RrAppearance *a, gint numtex)
 183 {
 184     g_assert(a->textures == 0);
 185
 186     a->textures = numtex;
 187     if (numtex) a->texture = g_new0(RrTexture, numtex);
 188 }
 189
 190 /* shallow copy means up the ref count and return it */
 191 RrAppearance *RrAppearanceCopyShallow(RrAppearance *orig)
 192 {
 193     orig->ref++;
 194     return orig;
 195 }
 196
 197 /* deep copy of orig, means reset ref to 1 on copy
 198  * and copy each thing memwise. */
 199 RrAppearance *RrAppearanceCopy(RrAppearance *orig)
 200 {
 201     RrSurface *spo, *spc;
 202     RrAppearance *copy = g_new(RrAppearance, 1);
 203     gint i;
 204
 205     copy->inst = orig->inst;
 206     copy->ref = 1;
 207
 208     spo = &(orig->surface);
 209     spc = &(copy->surface);
 210     spc->grad = spo->grad;
 211     spc->relief = spo->relief;
 212     spc->bevel = spo->bevel;
 213     if (spo->primary != NULL)
 214         spc->primary = RrColorNew(copy->inst,
 215                                   spo->primary->r,
 216                                   spo->primary->g,
 217                                   spo->primary->b);
 218     else spc->primary = NULL;
 219
 220     if (spo->secondary != NULL)
 221         spc->secondary = RrColorNew(copy->inst,
 222                                     spo->secondary->r,
 223                                     spo->secondary->g,
 224                                     spo->secondary->b);
 225     else spc->secondary = NULL;
 226
 227     if (spo->border_color != NULL)
 228         spc->border_color = RrColorNew(copy->inst,
 229                                        spo->border_color->r,
 230                                        spo->border_color->g,
 231                                        spo->border_color->b);
 232     else spc->border_color = NULL;
 233
 234     if (spo->interlace_color != NULL)
 235         spc->interlace_color = RrColorNew(copy->inst,
 236                                        spo->interlace_color->r,
 237                                        spo->interlace_color->g,
 238                                        spo->interlace_color->b);
 239     else spc->interlace_color = NULL;
 240
 241     if (spo->bevel_dark != NULL)
 242         spc->bevel_dark = RrColorNew(copy->inst,
 243                                      spo->bevel_dark->r,
 244                                      spo->bevel_dark->g,
 245                                      spo->bevel_dark->b);
 246     else spc->bevel_dark = NULL;
 247
 248     if (spo->bevel_light != NULL)
 249         spc->bevel_light = RrColorNew(copy->inst,
 250                                       spo->bevel_light->r,
 251                                       spo->bevel_light->g,
 252                                       spo->bevel_light->b);
 253     else spc->bevel_light = NULL;
 254
 255     if (spo->split_primary != NULL)
 256         spc->split_primary = RrColorNew(copy->inst,
 257                                         spo->split_primary->r,
 258                                         spo->split_primary->g,
 259                                         spo->split_primary->b);
 260     else spc->split_primary = NULL;
 261
 262     if (spo->split_secondary != NULL)
 263         spc->split_secondary = RrColorNew(copy->inst,
 264                                         spo->split_secondary->r,
 265                                         spo->split_secondary->g,
 266                                         spo->split_secondary->b);
 267     else spc->split_secondary = NULL;
 268
 269     spc->interlaced = spo->interlaced;
 270     spc->bevel_light_adjust = spo->bevel_light_adjust;
 271     spc->bevel_dark_adjust = spo->bevel_dark_adjust;
 272     spc->border = spo->border;
 273     spc->parent = NULL;
 274     spc->parentx = spc->parenty = 0;
 275     spc->pixel_data = NULL;
 276
 277     copy->textures = orig->textures;
 278     copy->texture = g_memdup(orig->texture,
 279                              orig->textures * sizeof(RrTexture));
 280     for (i = 0; i < copy->textures; ++i)
 281         if (copy->texture[i].type == RR_TEXTURE_RGBA) {
 282             copy->texture[i].data.rgba.cache = NULL;
 283         }
 284     copy->pixmap = None;
 285     copy->xftdraw = NULL;
 286     copy->w = copy->h = 0;
 287     return copy;
 288 }
 289
 290 /* now decrements ref counter, and frees only if ref <= 0 */
 291 void RrAppearanceFree(RrAppearance *a)
 292 {
 293     gint i;
 294
 295     if (!a) return;
 296
 297     /* decrement ref counter */
 298     if (a->ref-- > 0)
 299         return;
 300
 301     /* if we're here we have no more refs to this appearance, free it */
 302     RrSurface *p;
 303     if (a->pixmap != None) XFreePixmap(RrDisplay(a->inst), a->pixmap);
 304     if (a->xftdraw != NULL) XftDrawDestroy(a->xftdraw);
 305     for (i = 0; i < a->textures; ++i)
 306         if (a->texture[i].type == RR_TEXTURE_RGBA) {
 307             g_free(a->texture[i].data.rgba.cache);
 308             a->texture[i].data.rgba.cache = NULL;
 309         }
 310     if (a->textures)
 311         g_free(a->texture);
 312     p = &a->surface;
 313     RrColorFree(p->primary);
 314     RrColorFree(p->secondary);
 315     RrColorFree(p->border_color);
 316     RrColorFree(p->interlace_color);
 317     RrColorFree(p->bevel_dark);
 318     RrColorFree(p->bevel_light);
 319     RrColorFree(p->split_primary);
 320     RrColorFree(p->split_secondary);
 321     g_free(p->pixel_data);
 322     p->pixel_data = NULL;
 323     g_free(a);
 324
 325     /* set a to NULL so its testable afterwards if it still exists */
 326     a = NULL;
 327 }
 328
 329
 330 static void pixel_data_to_pixmap(RrAppearance *l,
 331                                  gint x, gint y, gint w, gint h)
 332 {
 333     RrPixel32 *in, *scratch;
 334     Pixmap out;
 335     XImage *im = NULL;
 336     im = XCreateImage(RrDisplay(l->inst), RrVisual(l->inst), RrDepth(l->inst),
 337                       ZPixmap, 0, NULL, w, h, 32, 0);
 338     g_assert(im != NULL);
 339
 340     in = l->surface.pixel_data;
 341     out = l->pixmap;
 342
 343 /* this malloc is a complete waste of time on normal 32bpp
 344    as reduce_depth just sets im->data = data and returns
 345 */
 346     scratch = g_new(RrPixel32, im->width * im->height);
 347     im->data = (gchar*) scratch;
 348     RrReduceDepth(l->inst, in, im);
 349     XPutImage(RrDisplay(l->inst), out,
 350               DefaultGC(RrDisplay(l->inst), RrScreen(l->inst)),
 351               im, 0, 0, x, y, w, h);
 352     im->data = NULL;
 353     XDestroyImage(im);
 354     g_free(scratch);
 355 }
 356
 357 void RrMargins (RrAppearance *a, gint *l, gint *t, gint *r, gint *b)
 358 {
 359     *l = *t = *r = *b = 0;
 360
 361     if (a->surface.grad != RR_SURFACE_PARENTREL) {
 362         if (a->surface.relief != RR_RELIEF_FLAT) {
 363             switch (a->surface.bevel) {
 364             case RR_BEVEL_1:
 365                 *l = *t = *r = *b = 1;
 366                 break;
 367             case RR_BEVEL_2:
 368                 *l = *t = *r = *b = 2;
 369                 break;
 370             }
 371         } else if (a->surface.border) {
 372             *l = *t = *r = *b = 1;
 373         }
 374     }
 375 }
 376
 377 void RrMinSize(RrAppearance *a, gint *w, gint *h)
 378 {
 379     *w = RrMinWidth(a);
 380     *h = RrMinHeight(a);
 381 }
 382
 383 gint RrMinWidth(RrAppearance *a)
 384 {
 385     gint i;
 386     RrSize *m;
 387     gint l, t, r, b;
 388     gint w = 0;
 389
 390     for (i = 0; i < a->textures; ++i) {
 391         switch (a->texture[i].type) {
 392         case RR_TEXTURE_NONE:
 393             break;
 394         case RR_TEXTURE_MASK:
 395             w = MAX(w, a->texture[i].data.mask.mask->width);
 396             break;
 397         case RR_TEXTURE_TEXT:
 398             m = RrFontMeasureString(a->texture[i].data.text.font,
 399                                     a->texture[i].data.text.string,
 400                                     a->texture[i].data.text.shadow_offset_x,
 401                                     a->texture[i].data.text.shadow_offset_y);
 402             w = MAX(w, m->width);
 403             g_free(m);
 404             break;
 405         case RR_TEXTURE_RGBA:
 406             w += MAX(w, a->texture[i].data.rgba.width);
 407             break;
 408         case RR_TEXTURE_LINE_ART:
 409             w += MAX(w, MAX(a->texture[i].data.lineart.x1,
 410                             a->texture[i].data.lineart.x2));
 411             break;
 412         }
 413     }
 414
 415     RrMargins(a, &l, &t, &r, &b);
 416
 417     w += l + r;
 418
 419     if (w < 1) w = 1;
 420     return w;
 421 }
 422
 423 gint RrMinHeight(RrAppearance *a)
 424 {
 425     gint i;
 426     gint l, t, r, b;
 427     gint h = 0;
 428
 429     for (i = 0; i < a->textures; ++i) {
 430         switch (a->texture[i].type) {
 431         case RR_TEXTURE_NONE:
 432             break;
 433         case RR_TEXTURE_MASK:
 434             h = MAX(h, a->texture[i].data.mask.mask->height);
 435             break;
 436         case RR_TEXTURE_TEXT:
 437             h += MAX(h, RrFontHeight(a->texture[i].data.text.font,
 438                                      a->texture[i].data.text.shadow_offset_y));
 439             break;
 440         case RR_TEXTURE_RGBA:
 441             h += MAX(h, a->texture[i].data.rgba.height);
 442             break;
 443         case RR_TEXTURE_LINE_ART:
 444             h += MAX(h, MAX(a->texture[i].data.lineart.y1,
 445                             a->texture[i].data.lineart.y2));
 446             break;
 447         }
 448     }
 449
 450     RrMargins(a, &l, &t, &r, &b);
 451
 452     h += t + b;
 453
 454     if (h < 1) h = 1;
 455     return h;
 456 }
 457
 458 static void reverse_bits(gchar *c, gint n)
 459 {
 460     gint i;
 461     for (i = 0; i < n; i++, c++)
 462         *c = (((*c * 0x0802UL & 0x22110UL) |
 463                (*c * 0x8020UL & 0x88440UL)) * 0x10101UL) >> 16;
 464 }
 465
 466 gboolean RrPixmapToRGBA(const RrInstance *inst,
 467                         Pixmap pmap, Pixmap mask,
 468                         gint *w, gint *h, RrPixel32 **data)
 469 {
 470     Window xr;
 471     gint xx, xy;
 472     guint pw, ph, mw, mh, xb, xd, i, x, y, di;
 473     XImage *xi, *xm = NULL;
 474
 475     if (!XGetGeometry(RrDisplay(inst), pmap,
 476                       &xr, &xx, &xy, &pw, &ph, &xb, &xd))
 477         return FALSE;
 478
 479     if (mask) {
 480         if (!XGetGeometry(RrDisplay(inst), mask,
 481                           &xr, &xx, &xy, &mw, &mh, &xb, &xd))
 482             return FALSE;
 483         if (pw != mw || ph != mh || xd != 1)
 484             return FALSE;
 485     }
 486
 487     xi = XGetImage(RrDisplay(inst), pmap,
 488                    0, 0, pw, ph, 0xffffffff, ZPixmap);
 489     if (!xi)
 490         return FALSE;
 491
 492     if (mask) {
 493         xm = XGetImage(RrDisplay(inst), mask,
 494                        0, 0, mw, mh, 0xffffffff, ZPixmap);
 495         if (!xm) {
 496             XDestroyImage(xi);
 497             return FALSE;
 498         }
 499         if ((xm->bits_per_pixel == 1) && (xm->bitmap_bit_order != LSBFirst))
 500             reverse_bits(xm->data, xm->bytes_per_line * xm->height);
 501     }
 502
 503     if ((xi->bits_per_pixel == 1) && (xi->bitmap_bit_order != LSBFirst))
 504         reverse_bits(xi->data, xi->bytes_per_line * xi->height);
 505
 506     *data = g_new(RrPixel32, pw * ph);
 507     RrIncreaseDepth(inst, *data, xi);
 508
 509     if (mask) {
 510         /* apply transparency from the mask */
 511         di = 0;
 512         for (i = 0, y = 0; y < ph; ++y) {
 513             for (x = 0; x < pw; ++x, ++i) {
 514                 if (!((((unsigned)xm->data[di + x / 8]) >> (x % 8)) & 0x1))
 515                     (*data)[i] &= ~(0xff << RrDefaultAlphaOffset);
 516             }
 517             di += xm->bytes_per_line;
 518         }
 519     }
 520
 521     *w = pw;
 522     *h = ph;
 523
 524     XDestroyImage(xi);
 525     if (mask)
 526         XDestroyImage(xm);
 527
 528     return TRUE;
 529 }