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->textures = numtex;
 174   out->surface.bevel_light_adjust = 128;
 175   out->surface.bevel_dark_adjust = 64;
 176   if (numtex) out->texture = g_new0(RrTexture, numtex);
 177
 178   return out;
 179 }
 180
 181 void RrAppearanceRemoveTextures(RrAppearance *a)
 182 {
 183     g_free(a->texture);
 184     a->textures = 0;
 185 }
 186
 187 void RrAppearanceAddTextures(RrAppearance *a, gint numtex)
 188 {
 189     g_assert(a->textures == 0);
 190
 191     a->textures = numtex;
 192     if (numtex) a->texture = g_new0(RrTexture, numtex);
 193 }
 194
 195 RrAppearance *RrAppearanceCopy(RrAppearance *orig)
 196 {
 197     RrSurface *spo, *spc;
 198     RrAppearance *copy = g_new(RrAppearance, 1);
 199     gint i;
 200
 201     copy->inst = orig->inst;
 202
 203     spo = &(orig->surface);
 204     spc = &(copy->surface);
 205     spc->grad = spo->grad;
 206     spc->relief = spo->relief;
 207     spc->bevel = spo->bevel;
 208     if (spo->primary != NULL)
 209         spc->primary = RrColorNew(copy->inst,
 210                                   spo->primary->r,
 211                                   spo->primary->g,
 212                                   spo->primary->b);
 213     else spc->primary = NULL;
 214
 215     if (spo->secondary != NULL)
 216         spc->secondary = RrColorNew(copy->inst,
 217                                     spo->secondary->r,
 218                                     spo->secondary->g,
 219                                     spo->secondary->b);
 220     else spc->secondary = NULL;
 221
 222     if (spo->border_color != NULL)
 223         spc->border_color = RrColorNew(copy->inst,
 224                                        spo->border_color->r,
 225                                        spo->border_color->g,
 226                                        spo->border_color->b);
 227     else spc->border_color = NULL;
 228
 229     if (spo->interlace_color != NULL)
 230         spc->interlace_color = RrColorNew(copy->inst,
 231                                        spo->interlace_color->r,
 232                                        spo->interlace_color->g,
 233                                        spo->interlace_color->b);
 234     else spc->interlace_color = NULL;
 235
 236     if (spo->bevel_dark != NULL)
 237         spc->bevel_dark = RrColorNew(copy->inst,
 238                                      spo->bevel_dark->r,
 239                                      spo->bevel_dark->g,
 240                                      spo->bevel_dark->b);
 241     else spc->bevel_dark = NULL;
 242
 243     if (spo->bevel_light != NULL)
 244         spc->bevel_light = RrColorNew(copy->inst,
 245                                       spo->bevel_light->r,
 246                                       spo->bevel_light->g,
 247                                       spo->bevel_light->b);
 248     else spc->bevel_light = NULL;
 249
 250     if (spo->split_primary != NULL)
 251         spc->split_primary = RrColorNew(copy->inst,
 252                                         spo->split_primary->r,
 253                                         spo->split_primary->g,
 254                                         spo->split_primary->b);
 255     else spc->split_primary = NULL;
 256
 257     if (spo->split_secondary != NULL)
 258         spc->split_secondary = RrColorNew(copy->inst,
 259                                         spo->split_secondary->r,
 260                                         spo->split_secondary->g,
 261                                         spo->split_secondary->b);
 262     else spc->split_secondary = NULL;
 263
 264     spc->interlaced = spo->interlaced;
 265     spc->bevel_light_adjust = spo->bevel_light_adjust;
 266     spc->bevel_dark_adjust = spo->bevel_dark_adjust;
 267     spc->border = spo->border;
 268     spc->parent = NULL;
 269     spc->parentx = spc->parenty = 0;
 270     spc->pixel_data = NULL;
 271
 272     copy->textures = orig->textures;
 273     copy->texture = g_memdup(orig->texture,
 274                              orig->textures * sizeof(RrTexture));
 275     for (i = 0; i < copy->textures; ++i)
 276         if (copy->texture[i].type == RR_TEXTURE_RGBA) {
 277             copy->texture[i].data.rgba.cache = NULL;
 278         }
 279     copy->pixmap = None;
 280     copy->xftdraw = NULL;
 281     copy->w = copy->h = 0;
 282     return copy;
 283 }
 284
 285 void RrAppearanceFree(RrAppearance *a)
 286 {
 287     gint i;
 288
 289     if (a) {
 290         RrSurface *p;
 291         if (a->pixmap != None) XFreePixmap(RrDisplay(a->inst), a->pixmap);
 292         if (a->xftdraw != NULL) XftDrawDestroy(a->xftdraw);
 293         for (i = 0; i < a->textures; ++i)
 294             if (a->texture[i].type == RR_TEXTURE_RGBA) {
 295                 g_free(a->texture[i].data.rgba.cache);
 296                 a->texture[i].data.rgba.cache = NULL;
 297             }
 298         if (a->textures)
 299             g_free(a->texture);
 300         p = &a->surface;
 301         RrColorFree(p->primary);
 302         RrColorFree(p->secondary);
 303         RrColorFree(p->border_color);
 304         RrColorFree(p->interlace_color);
 305         RrColorFree(p->bevel_dark);
 306         RrColorFree(p->bevel_light);
 307         RrColorFree(p->split_primary);
 308         RrColorFree(p->split_secondary);
 309         g_free(p->pixel_data);
 310         p->pixel_data = NULL;
 311         g_free(a);
 312     }
 313 }
 314
 315
 316 static void pixel_data_to_pixmap(RrAppearance *l,
 317                                  gint x, gint y, gint w, gint h)
 318 {
 319     RrPixel32 *in, *scratch;
 320     Pixmap out;
 321     XImage *im = NULL;
 322     im = XCreateImage(RrDisplay(l->inst), RrVisual(l->inst), RrDepth(l->inst),
 323                       ZPixmap, 0, NULL, w, h, 32, 0);
 324     g_assert(im != NULL);
 325
 326     in = l->surface.pixel_data;
 327     out = l->pixmap;
 328
 329 /* this malloc is a complete waste of time on normal 32bpp
 330    as reduce_depth just sets im->data = data and returns
 331 */
 332     scratch = g_new(RrPixel32, im->width * im->height);
 333     im->data = (gchar*) scratch;
 334     RrReduceDepth(l->inst, in, im);
 335     XPutImage(RrDisplay(l->inst), out,
 336               DefaultGC(RrDisplay(l->inst), RrScreen(l->inst)),
 337               im, 0, 0, x, y, w, h);
 338     im->data = NULL;
 339     XDestroyImage(im);
 340     g_free(scratch);
 341 }
 342
 343 void RrMargins (RrAppearance *a, gint *l, gint *t, gint *r, gint *b)
 344 {
 345     *l = *t = *r = *b = 0;
 346
 347     if (a->surface.grad != RR_SURFACE_PARENTREL) {
 348         if (a->surface.relief != RR_RELIEF_FLAT) {
 349             switch (a->surface.bevel) {
 350             case RR_BEVEL_1:
 351                 *l = *t = *r = *b = 1;
 352                 break;
 353             case RR_BEVEL_2:
 354                 *l = *t = *r = *b = 2;
 355                 break;
 356             }
 357         } else if (a->surface.border) {
 358             *l = *t = *r = *b = 1;
 359         }
 360     }
 361 }
 362
 363 void RrMinSize(RrAppearance *a, gint *w, gint *h)
 364 {
 365     *w = RrMinWidth(a);
 366     *h = RrMinHeight(a);
 367 }
 368
 369 gint RrMinWidth(RrAppearance *a)
 370 {
 371     gint i;
 372     RrSize *m;
 373     gint l, t, r, b;
 374     gint w = 0;
 375
 376     for (i = 0; i < a->textures; ++i) {
 377         switch (a->texture[i].type) {
 378         case RR_TEXTURE_NONE:
 379             break;
 380         case RR_TEXTURE_MASK:
 381             w = MAX(w, a->texture[i].data.mask.mask->width);
 382             break;
 383         case RR_TEXTURE_TEXT:
 384             m = RrFontMeasureString(a->texture[i].data.text.font,
 385                                     a->texture[i].data.text.string,
 386                                     a->texture[i].data.text.shadow_offset_x,
 387                                     a->texture[i].data.text.shadow_offset_y,
 388                                     a->texture[i].data.text.flow,
 389                                     a->texture[i].data.text.maxwidth);
 390             w = MAX(w, m->width);
 391             g_free(m);
 392             break;
 393         case RR_TEXTURE_RGBA:
 394             w += MAX(w, a->texture[i].data.rgba.width);
 395             break;
 396         case RR_TEXTURE_LINE_ART:
 397             w += MAX(w, MAX(a->texture[i].data.lineart.x1,
 398                             a->texture[i].data.lineart.x2));
 399             break;
 400         }
 401     }
 402
 403     RrMargins(a, &l, &t, &r, &b);
 404
 405     w += l + r;
 406
 407     if (w < 1) w = 1;
 408     return w;
 409 }
 410
 411 gint RrMinHeight(RrAppearance *a)
 412 {
 413     gint i;
 414     gint l, t, r, b;
 415     RrSize *m;
 416     gint h = 0;
 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             h = MAX(h, a->texture[i].data.mask.mask->height);
 424             break;
 425         case RR_TEXTURE_TEXT:
 426             if (a->texture[i].data.text.flow) {
 427                 g_assert(a->texture[i].data.text.string != NULL);
 428
 429                 m = RrFontMeasureString
 430                     (a->texture[i].data.text.font,
 431                      a->texture[i].data.text.string,
 432                      a->texture[i].data.text.shadow_offset_x,
 433                      a->texture[i].data.text.shadow_offset_y,
 434                      a->texture[i].data.text.flow,
 435                      a->texture[i].data.text.maxwidth);
 436                 h += MAX(h, m->height);
 437                 g_free(m);
 438             }
 439             else
 440                 h += MAX(h,
 441                          RrFontHeight
 442                          (a->texture[i].data.text.font,
 443                           a->texture[i].data.text.shadow_offset_y));
 444             break;
 445         case RR_TEXTURE_RGBA:
 446             h += MAX(h, a->texture[i].data.rgba.height);
 447             break;
 448         case RR_TEXTURE_LINE_ART:
 449             h += MAX(h, MAX(a->texture[i].data.lineart.y1,
 450                             a->texture[i].data.lineart.y2));
 451             break;
 452         }
 453     }
 454
 455     RrMargins(a, &l, &t, &r, &b);
 456
 457     h += t + b;
 458
 459     if (h < 1) h = 1;
 460     return h;
 461 }
 462
 463 static void reverse_bits(gchar *c, gint n)
 464 {
 465     gint i;
 466     for (i = 0; i < n; i++, c++)
 467         *c = (((*c * 0x0802UL & 0x22110UL) |
 468                (*c * 0x8020UL & 0x88440UL)) * 0x10101UL) >> 16;
 469 }
 470
 471 gboolean RrPixmapToRGBA(const RrInstance *inst,
 472                         Pixmap pmap, Pixmap mask,
 473                         gint *w, gint *h, RrPixel32 **data)
 474 {
 475     Window xr;
 476     gint xx, xy;
 477     guint pw, ph, mw, mh, xb, xd, i, x, y, di;
 478     XImage *xi, *xm = NULL;
 479
 480     if (!XGetGeometry(RrDisplay(inst), pmap,
 481                       &xr, &xx, &xy, &pw, &ph, &xb, &xd))
 482         return FALSE;
 483
 484     if (mask) {
 485         if (!XGetGeometry(RrDisplay(inst), mask,
 486                           &xr, &xx, &xy, &mw, &mh, &xb, &xd))
 487             return FALSE;
 488         if (pw != mw || ph != mh || xd != 1)
 489             return FALSE;
 490     }
 491
 492     xi = XGetImage(RrDisplay(inst), pmap,
 493                    0, 0, pw, ph, 0xffffffff, ZPixmap);
 494     if (!xi)
 495         return FALSE;
 496
 497     if (mask) {
 498         xm = XGetImage(RrDisplay(inst), mask,
 499                        0, 0, mw, mh, 0xffffffff, ZPixmap);
 500         if (!xm) {
 501             XDestroyImage(xi);
 502             return FALSE;
 503         }
 504         if ((xm->bits_per_pixel == 1) && (xm->bitmap_bit_order != LSBFirst))
 505             reverse_bits(xm->data, xm->bytes_per_line * xm->height);
 506     }
 507
 508     if ((xi->bits_per_pixel == 1) && (xi->bitmap_bit_order != LSBFirst))
 509         reverse_bits(xi->data, xi->bytes_per_line * xi->height);
 510
 511     *data = g_new(RrPixel32, pw * ph);
 512     RrIncreaseDepth(inst, *data, xi);
 513
 514     if (mask) {
 515         /* apply transparency from the mask */
 516         di = 0;
 517         for (i = 0, y = 0; y < ph; ++y) {
 518             for (x = 0; x < pw; ++x, ++i) {
 519                 if (!((((unsigned)xm->data[di + x / 8]) >> (x % 8)) & 0x1))
 520                     (*data)[i] &= ~(0xff << RrDefaultAlphaOffset);
 521             }
 522             di += xm->bytes_per_line;
 523         }
 524     }
 525
 526     *w = pw;
 527     *h = ph;
 528
 529     XDestroyImage(xi);
 530     if (mask)
 531         XDestroyImage(xm);
 532
 533     return TRUE;
 534 }