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             {
 136                 RrRect narea = tarea;
 137                 RrTextureRGBA *rgb = &a->texture[i].data.rgba;
 138                 if (rgb->twidth)
 139                     narea.width = MIN(tarea.width, rgb->twidth);
 140                 if (rgb->theight)
 141                     narea.height = MIN(tarea.height, rgb->theight);
 142                 narea.x += rgb->tx;
 143                 narea.y += rgb->ty;
 144                 RrImageDraw(a->surface.pixel_data,
 145                             &a->texture[i].data.rgba,
 146                             a->w, a->h,
 147                             &narea);
 148             }
 149             force_transfer = 1;
 150         break;
 151         }
 152     }
 153
 154     if (!transferred) {
 155         transferred = 1;
 156         if ((a->surface.grad != RR_SURFACE_SOLID) || (a->surface.interlaced) ||
 157             force_transfer)
 158         {
 159             pixel_data_to_pixmap(a, 0, 0, w, h);
 160         }
 161     }
 162
 163     return oldp;
 164 }
 165
 166 void RrPaint(RrAppearance *a, Window win, gint w, gint h)
 167 {
 168     Pixmap oldp;
 169
 170     oldp = RrPaintPixmap(a, w, h);
 171     XSetWindowBackgroundPixmap(RrDisplay(a->inst), win, a->pixmap);
 172     XClearWindow(RrDisplay(a->inst), win);
 173     /* free this after changing the visible pixmap */
 174     if (oldp) XFreePixmap(RrDisplay(a->inst), oldp);
 175 }
 176
 177 RrAppearance *RrAppearanceNew(const RrInstance *inst, gint numtex)
 178 {
 179   RrAppearance *out;
 180
 181   out = g_new0(RrAppearance, 1);
 182   out->inst = inst;
 183   out->textures = numtex;
 184   out->surface.bevel_light_adjust = 128;
 185   out->surface.bevel_dark_adjust = 64;
 186   if (numtex) out->texture = g_new0(RrTexture, numtex);
 187
 188   return out;
 189 }
 190
 191 void RrAppearanceRemoveTextures(RrAppearance *a)
 192 {
 193     g_free(a->texture);
 194     a->textures = 0;
 195 }
 196
 197 void RrAppearanceAddTextures(RrAppearance *a, gint numtex)
 198 {
 199     g_assert(a->textures == 0);
 200
 201     a->textures = numtex;
 202     if (numtex) a->texture = g_new0(RrTexture, numtex);
 203 }
 204
 205 RrAppearance *RrAppearanceCopy(RrAppearance *orig)
 206 {
 207     RrSurface *spo, *spc;
 208     RrAppearance *copy = g_new(RrAppearance, 1);
 209     gint i;
 210
 211     copy->inst = orig->inst;
 212
 213     spo = &(orig->surface);
 214     spc = &(copy->surface);
 215     spc->grad = spo->grad;
 216     spc->relief = spo->relief;
 217     spc->bevel = spo->bevel;
 218     if (spo->primary != NULL)
 219         spc->primary = RrColorNew(copy->inst,
 220                                   spo->primary->r,
 221                                   spo->primary->g,
 222                                   spo->primary->b);
 223     else spc->primary = NULL;
 224
 225     if (spo->secondary != NULL)
 226         spc->secondary = RrColorNew(copy->inst,
 227                                     spo->secondary->r,
 228                                     spo->secondary->g,
 229                                     spo->secondary->b);
 230     else spc->secondary = NULL;
 231
 232     if (spo->border_color != NULL)
 233         spc->border_color = RrColorNew(copy->inst,
 234                                        spo->border_color->r,
 235                                        spo->border_color->g,
 236                                        spo->border_color->b);
 237     else spc->border_color = NULL;
 238
 239     if (spo->interlace_color != NULL)
 240         spc->interlace_color = RrColorNew(copy->inst,
 241                                        spo->interlace_color->r,
 242                                        spo->interlace_color->g,
 243                                        spo->interlace_color->b);
 244     else spc->interlace_color = NULL;
 245
 246     if (spo->bevel_dark != NULL)
 247         spc->bevel_dark = RrColorNew(copy->inst,
 248                                      spo->bevel_dark->r,
 249                                      spo->bevel_dark->g,
 250                                      spo->bevel_dark->b);
 251     else spc->bevel_dark = NULL;
 252
 253     if (spo->bevel_light != NULL)
 254         spc->bevel_light = RrColorNew(copy->inst,
 255                                       spo->bevel_light->r,
 256                                       spo->bevel_light->g,
 257                                       spo->bevel_light->b);
 258     else spc->bevel_light = NULL;
 259
 260     if (spo->split_primary != NULL)
 261         spc->split_primary = RrColorNew(copy->inst,
 262                                         spo->split_primary->r,
 263                                         spo->split_primary->g,
 264                                         spo->split_primary->b);
 265     else spc->split_primary = NULL;
 266
 267     if (spo->split_secondary != NULL)
 268         spc->split_secondary = RrColorNew(copy->inst,
 269                                         spo->split_secondary->r,
 270                                         spo->split_secondary->g,
 271                                         spo->split_secondary->b);
 272     else spc->split_secondary = NULL;
 273
 274     spc->interlaced = spo->interlaced;
 275     spc->bevel_light_adjust = spo->bevel_light_adjust;
 276     spc->bevel_dark_adjust = spo->bevel_dark_adjust;
 277     spc->border = spo->border;
 278     spc->parent = NULL;
 279     spc->parentx = spc->parenty = 0;
 280     spc->pixel_data = NULL;
 281
 282     copy->textures = orig->textures;
 283     copy->texture = g_memdup(orig->texture,
 284                              orig->textures * sizeof(RrTexture));
 285     for (i = 0; i < copy->textures; ++i)
 286         if (copy->texture[i].type == RR_TEXTURE_RGBA) {
 287             copy->texture[i].data.rgba.cache = NULL;
 288         }
 289     copy->pixmap = None;
 290     copy->xftdraw = NULL;
 291     copy->w = copy->h = 0;
 292     return copy;
 293 }
 294
 295 void RrAppearanceFree(RrAppearance *a)
 296 {
 297     gint i;
 298
 299     if (a) {
 300         RrSurface *p;
 301         if (a->pixmap != None) XFreePixmap(RrDisplay(a->inst), a->pixmap);
 302         if (a->xftdraw != NULL) XftDrawDestroy(a->xftdraw);
 303         for (i = 0; i < a->textures; ++i)
 304             if (a->texture[i].type == RR_TEXTURE_RGBA) {
 305                 g_free(a->texture[i].data.rgba.cache);
 306                 a->texture[i].data.rgba.cache = NULL;
 307             }
 308         if (a->textures)
 309             g_free(a->texture);
 310         p = &a->surface;
 311         RrColorFree(p->primary);
 312         RrColorFree(p->secondary);
 313         RrColorFree(p->border_color);
 314         RrColorFree(p->interlace_color);
 315         RrColorFree(p->bevel_dark);
 316         RrColorFree(p->bevel_light);
 317         RrColorFree(p->split_primary);
 318         RrColorFree(p->split_secondary);
 319         g_free(p->pixel_data);
 320         p->pixel_data = NULL;
 321         g_free(a);
 322     }
 323 }
 324
 325
 326 static void pixel_data_to_pixmap(RrAppearance *l,
 327                                  gint x, gint y, gint w, gint h)
 328 {
 329     RrPixel32 *in, *scratch;
 330     Pixmap out;
 331     XImage *im = NULL;
 332     im = XCreateImage(RrDisplay(l->inst), RrVisual(l->inst), RrDepth(l->inst),
 333                       ZPixmap, 0, NULL, w, h, 32, 0);
 334     g_assert(im != NULL);
 335
 336     in = l->surface.pixel_data;
 337     out = l->pixmap;
 338
 339 /* this malloc is a complete waste of time on normal 32bpp
 340    as reduce_depth just sets im->data = data and returns
 341 */
 342     scratch = g_new(RrPixel32, im->width * im->height);
 343     im->data = (gchar*) scratch;
 344     RrReduceDepth(l->inst, in, im);
 345     XPutImage(RrDisplay(l->inst), out,
 346               DefaultGC(RrDisplay(l->inst), RrScreen(l->inst)),
 347               im, 0, 0, x, y, w, h);
 348     im->data = NULL;
 349     XDestroyImage(im);
 350     g_free(scratch);
 351 }
 352
 353 void RrMargins (RrAppearance *a, gint *l, gint *t, gint *r, gint *b)
 354 {
 355     *l = *t = *r = *b = 0;
 356
 357     if (a->surface.grad != RR_SURFACE_PARENTREL) {
 358         if (a->surface.relief != RR_RELIEF_FLAT) {
 359             switch (a->surface.bevel) {
 360             case RR_BEVEL_1:
 361                 *l = *t = *r = *b = 1;
 362                 break;
 363             case RR_BEVEL_2:
 364                 *l = *t = *r = *b = 2;
 365                 break;
 366             }
 367         } else if (a->surface.border) {
 368             *l = *t = *r = *b = 1;
 369         }
 370     }
 371 }
 372
 373 void RrMinSize(RrAppearance *a, gint *w, gint *h)
 374 {
 375     *w = RrMinWidth(a);
 376     *h = RrMinHeight(a);
 377 }
 378
 379 gint RrMinWidth(RrAppearance *a)
 380 {
 381     gint i;
 382     RrSize *m;
 383     gint l, t, r, b;
 384     gint w = 0;
 385
 386     RrMargins(a, &l, &t, &r, &b);
 387
 388     for (i = 0; i < a->textures; ++i) {
 389         switch (a->texture[i].type) {
 390         case RR_TEXTURE_NONE:
 391             break;
 392         case RR_TEXTURE_MASK:
 393             w = MAX(w, a->texture[i].data.mask.mask->width);
 394             break;
 395         case RR_TEXTURE_TEXT:
 396             m = RrFontMeasureString(a->texture[i].data.text.font,
 397                                     a->texture[i].data.text.string,
 398                                     a->texture[i].data.text.shadow_offset_x,
 399                                     a->texture[i].data.text.shadow_offset_y,
 400                                     a->texture[i].data.text.flow,
 401                                     a->texture[i].data.text.maxwidth);
 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 - l - r,
 410                            a->texture[i].data.lineart.x2 - l - r));
 411             break;
 412         }
 413     }
 414
 415     w += l + r;
 416
 417     if (w < 1) w = 1;
 418     return w;
 419 }
 420
 421 gint RrMinHeight(RrAppearance *a)
 422 {
 423     gint i;
 424     gint l, t, r, b;
 425     RrSize *m;
 426     gint h = 0;
 427
 428     RrMargins(a, &l, &t, &r, &b);
 429
 430     for (i = 0; i < a->textures; ++i) {
 431         switch (a->texture[i].type) {
 432         case RR_TEXTURE_NONE:
 433             break;
 434         case RR_TEXTURE_MASK:
 435             h = MAX(h, a->texture[i].data.mask.mask->height);
 436             break;
 437         case RR_TEXTURE_TEXT:
 438             if (a->texture[i].data.text.flow) {
 439                 g_assert(a->texture[i].data.text.string != NULL);
 440
 441                 m = RrFontMeasureString
 442                     (a->texture[i].data.text.font,
 443                      a->texture[i].data.text.string,
 444                      a->texture[i].data.text.shadow_offset_x,
 445                      a->texture[i].data.text.shadow_offset_y,
 446                      a->texture[i].data.text.flow,
 447                      a->texture[i].data.text.maxwidth);
 448                 h += MAX(h, m->height);
 449                 g_free(m);
 450             }
 451             else
 452                 h += MAX(h,
 453                          RrFontHeight
 454                          (a->texture[i].data.text.font,
 455                           a->texture[i].data.text.shadow_offset_y));
 456             break;
 457         case RR_TEXTURE_RGBA:
 458             h += MAX(h, a->texture[i].data.rgba.height);
 459             break;
 460         case RR_TEXTURE_LINE_ART:
 461             h = MAX(h, MAX(a->texture[i].data.lineart.y1 - t - b,
 462                            a->texture[i].data.lineart.y2 - t - b));
 463             break;
 464         }
 465     }
 466
 467     h += t + b;
 468
 469     if (h < 1) h = 1;
 470     return h;
 471 }
 472
 473 static void reverse_bits(gchar *c, gint n)
 474 {
 475     gint i;
 476     for (i = 0; i < n; i++, c++)
 477         *c = (((*c * 0x0802UL & 0x22110UL) |
 478                (*c * 0x8020UL & 0x88440UL)) * 0x10101UL) >> 16;
 479 }
 480
 481 gboolean RrPixmapToRGBA(const RrInstance *inst,
 482                         Pixmap pmap, Pixmap mask,
 483                         gint *w, gint *h, RrPixel32 **data)
 484 {
 485     Window xr;
 486     gint xx, xy;
 487     guint pw, ph, mw, mh, xb, xd, i, x, y, di;
 488     XImage *xi, *xm = NULL;
 489
 490     if (!XGetGeometry(RrDisplay(inst), pmap,
 491                       &xr, &xx, &xy, &pw, &ph, &xb, &xd))
 492         return FALSE;
 493
 494     if (mask) {
 495         if (!XGetGeometry(RrDisplay(inst), mask,
 496                           &xr, &xx, &xy, &mw, &mh, &xb, &xd))
 497             return FALSE;
 498         if (pw != mw || ph != mh || xd != 1)
 499             return FALSE;
 500     }
 501
 502     xi = XGetImage(RrDisplay(inst), pmap,
 503                    0, 0, pw, ph, 0xffffffff, ZPixmap);
 504     if (!xi)
 505         return FALSE;
 506
 507     if (mask) {
 508         xm = XGetImage(RrDisplay(inst), mask,
 509                        0, 0, mw, mh, 0xffffffff, ZPixmap);
 510         if (!xm) {
 511             XDestroyImage(xi);
 512             return FALSE;
 513         }
 514         if ((xm->bits_per_pixel == 1) && (xm->bitmap_bit_order != LSBFirst))
 515             reverse_bits(xm->data, xm->bytes_per_line * xm->height);
 516     }
 517
 518     if ((xi->bits_per_pixel == 1) && (xi->bitmap_bit_order != LSBFirst))
 519         reverse_bits(xi->data, xi->bytes_per_line * xi->height);
 520
 521     *data = g_new(RrPixel32, pw * ph);
 522     RrIncreaseDepth(inst, *data, xi);
 523
 524     if (mask) {
 525         /* apply transparency from the mask */
 526         di = 0;
 527         for (i = 0, y = 0; y < ph; ++y) {
 528             for (x = 0; x < pw; ++x, ++i) {
 529                 if (!((((unsigned)xm->data[di + x / 8]) >> (x % 8)) & 0x1))
 530                     (*data)[i] &= ~(0xff << RrDefaultAlphaOffset);
 531             }
 532             di += xm->bytes_per_line;
 533         }
 534     }
 535
 536     *w = pw;
 537     *h = ph;
 538
 539     XDestroyImage(xi);
 540     if (mask)
 541         XDestroyImage(xm);
 542
 543     return TRUE;
 544 }