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_IMAGE:
 134             g_assert(!transferred);
 135             {
 136                 RrRect narea = tarea;
 137                 RrTextureImage *img = &a->texture[i].data.image;
 138                 if (img->twidth)
 139                     narea.width = MIN(tarea.width, img->twidth);
 140                 if (img->theight)
 141                     narea.height = MIN(tarea.height, img->theight);
 142                 narea.x += img->tx;
 143                 narea.y += img->ty;
 144                 RrImageDrawImage(a->surface.pixel_data,
 145                                  &a->texture[i].data.image,
 146                                  a->w, a->h,
 147                                  &narea);
 148             }
 149             force_transfer = 1;
 150             break;
 151         case RR_TEXTURE_RGBA:
 152             g_assert(!transferred);
 153             {
 154                 RrRect narea = tarea;
 155                 RrTextureRGBA *rgb = &a->texture[i].data.rgba;
 156                 if (rgb->twidth)
 157                     narea.width = MIN(tarea.width, rgb->twidth);
 158                 if (rgb->theight)
 159                     narea.height = MIN(tarea.height, rgb->theight);
 160                 narea.x += rgb->tx;
 161                 narea.y += rgb->ty;
 162                 RrImageDrawRGBA(a->surface.pixel_data,
 163                                 &a->texture[i].data.rgba,
 164                                 a->w, a->h,
 165                                 &narea);
 166             }
 167             force_transfer = 1;
 168         break;
 169         }
 170     }
 171
 172     if (!transferred) {
 173         transferred = 1;
 174         if ((a->surface.grad != RR_SURFACE_SOLID) || (a->surface.interlaced) ||
 175             force_transfer)
 176         {
 177             pixel_data_to_pixmap(a, 0, 0, w, h);
 178         }
 179     }
 180
 181     return oldp;
 182 }
 183
 184 void RrPaint(RrAppearance *a, Window win, gint w, gint h)
 185 {
 186     Pixmap oldp;
 187
 188     oldp = RrPaintPixmap(a, w, h);
 189     XSetWindowBackgroundPixmap(RrDisplay(a->inst), win, a->pixmap);
 190     XClearWindow(RrDisplay(a->inst), win);
 191     /* free this after changing the visible pixmap */
 192     if (oldp) XFreePixmap(RrDisplay(a->inst), oldp);
 193 }
 194
 195 RrAppearance *RrAppearanceNew(const RrInstance *inst, gint numtex)
 196 {
 197   RrAppearance *out;
 198
 199   out = g_new0(RrAppearance, 1);
 200   out->inst = inst;
 201   out->textures = numtex;
 202   out->surface.bevel_light_adjust = 128;
 203   out->surface.bevel_dark_adjust = 64;
 204   if (numtex) out->texture = g_new0(RrTexture, numtex);
 205
 206   return out;
 207 }
 208
 209 void RrAppearanceRemoveTextures(RrAppearance *a)
 210 {
 211     g_free(a->texture);
 212     a->textures = 0;
 213 }
 214
 215 void RrAppearanceAddTextures(RrAppearance *a, gint numtex)
 216 {
 217     g_assert(a->textures == 0);
 218
 219     a->textures = numtex;
 220     if (numtex) a->texture = g_new0(RrTexture, numtex);
 221 }
 222
 223 void RrAppearanceClearTextures(RrAppearance *a)
 224 {
 225     memset(a->texture, 0, a->textures * sizeof(RrTexture));
 226 }
 227
 228 RrAppearance *RrAppearanceCopy(RrAppearance *orig)
 229 {
 230     RrSurface *spo, *spc;
 231     RrAppearance *copy = g_new(RrAppearance, 1);
 232
 233     copy->inst = orig->inst;
 234
 235     spo = &(orig->surface);
 236     spc = &(copy->surface);
 237     spc->grad = spo->grad;
 238     spc->relief = spo->relief;
 239     spc->bevel = spo->bevel;
 240     if (spo->primary != NULL)
 241         spc->primary = RrColorNew(copy->inst,
 242                                   spo->primary->r,
 243                                   spo->primary->g,
 244                                   spo->primary->b);
 245     else spc->primary = NULL;
 246
 247     if (spo->secondary != NULL)
 248         spc->secondary = RrColorNew(copy->inst,
 249                                     spo->secondary->r,
 250                                     spo->secondary->g,
 251                                     spo->secondary->b);
 252     else spc->secondary = NULL;
 253
 254     if (spo->border_color != NULL)
 255         spc->border_color = RrColorNew(copy->inst,
 256                                        spo->border_color->r,
 257                                        spo->border_color->g,
 258                                        spo->border_color->b);
 259     else spc->border_color = NULL;
 260
 261     if (spo->interlace_color != NULL)
 262         spc->interlace_color = RrColorNew(copy->inst,
 263                                        spo->interlace_color->r,
 264                                        spo->interlace_color->g,
 265                                        spo->interlace_color->b);
 266     else spc->interlace_color = NULL;
 267
 268     if (spo->bevel_dark != NULL)
 269         spc->bevel_dark = RrColorNew(copy->inst,
 270                                      spo->bevel_dark->r,
 271                                      spo->bevel_dark->g,
 272                                      spo->bevel_dark->b);
 273     else spc->bevel_dark = NULL;
 274
 275     if (spo->bevel_light != NULL)
 276         spc->bevel_light = RrColorNew(copy->inst,
 277                                       spo->bevel_light->r,
 278                                       spo->bevel_light->g,
 279                                       spo->bevel_light->b);
 280     else spc->bevel_light = NULL;
 281
 282     if (spo->split_primary != NULL)
 283         spc->split_primary = RrColorNew(copy->inst,
 284                                         spo->split_primary->r,
 285                                         spo->split_primary->g,
 286                                         spo->split_primary->b);
 287     else spc->split_primary = NULL;
 288
 289     if (spo->split_secondary != NULL)
 290         spc->split_secondary = RrColorNew(copy->inst,
 291                                         spo->split_secondary->r,
 292                                         spo->split_secondary->g,
 293                                         spo->split_secondary->b);
 294     else spc->split_secondary = NULL;
 295
 296     spc->interlaced = spo->interlaced;
 297     spc->bevel_light_adjust = spo->bevel_light_adjust;
 298     spc->bevel_dark_adjust = spo->bevel_dark_adjust;
 299     spc->border = spo->border;
 300     spc->parent = NULL;
 301     spc->parentx = spc->parenty = 0;
 302     spc->pixel_data = NULL;
 303
 304     copy->textures = orig->textures;
 305     copy->texture = g_memdup(orig->texture,
 306                              orig->textures * sizeof(RrTexture));
 307     copy->pixmap = None;
 308     copy->xftdraw = NULL;
 309     copy->w = copy->h = 0;
 310     return copy;
 311 }
 312
 313 void RrAppearanceFree(RrAppearance *a)
 314 {
 315     if (a) {
 316         RrSurface *p;
 317         if (a->pixmap != None) XFreePixmap(RrDisplay(a->inst), a->pixmap);
 318         if (a->xftdraw != NULL) XftDrawDestroy(a->xftdraw);
 319         if (a->textures)
 320             g_free(a->texture);
 321         p = &a->surface;
 322         RrColorFree(p->primary);
 323         RrColorFree(p->secondary);
 324         RrColorFree(p->border_color);
 325         RrColorFree(p->interlace_color);
 326         RrColorFree(p->bevel_dark);
 327         RrColorFree(p->bevel_light);
 328         RrColorFree(p->split_primary);
 329         RrColorFree(p->split_secondary);
 330         g_free(p->pixel_data);
 331         p->pixel_data = NULL;
 332         g_free(a);
 333     }
 334 }
 335
 336
 337 static void pixel_data_to_pixmap(RrAppearance *l,
 338                                  gint x, gint y, gint w, gint h)
 339 {
 340     RrPixel32 *in, *scratch;
 341     Pixmap out;
 342     XImage *im = NULL;
 343     im = XCreateImage(RrDisplay(l->inst), RrVisual(l->inst), RrDepth(l->inst),
 344                       ZPixmap, 0, NULL, w, h, 32, 0);
 345     g_assert(im != NULL);
 346
 347     in = l->surface.pixel_data;
 348     out = l->pixmap;
 349
 350 /* this malloc is a complete waste of time on normal 32bpp
 351    as reduce_depth just sets im->data = data and returns
 352 */
 353     scratch = g_new(RrPixel32, im->width * im->height);
 354     im->data = (gchar*) scratch;
 355     RrReduceDepth(l->inst, in, im);
 356     XPutImage(RrDisplay(l->inst), out,
 357               DefaultGC(RrDisplay(l->inst), RrScreen(l->inst)),
 358               im, 0, 0, x, y, w, h);
 359     im->data = NULL;
 360     XDestroyImage(im);
 361     g_free(scratch);
 362 }
 363
 364 void RrMargins (RrAppearance *a, gint *l, gint *t, gint *r, gint *b)
 365 {
 366     *l = *t = *r = *b = 0;
 367
 368     if (a->surface.grad != RR_SURFACE_PARENTREL) {
 369         if (a->surface.relief != RR_RELIEF_FLAT) {
 370             switch (a->surface.bevel) {
 371             case RR_BEVEL_1:
 372                 *l = *t = *r = *b = 1;
 373                 break;
 374             case RR_BEVEL_2:
 375                 *l = *t = *r = *b = 2;
 376                 break;
 377             }
 378         } else if (a->surface.border) {
 379             *l = *t = *r = *b = 1;
 380         }
 381     }
 382 }
 383
 384 void RrMinSize(RrAppearance *a, gint *w, gint *h)
 385 {
 386     *w = RrMinWidth(a);
 387     *h = RrMinHeight(a);
 388 }
 389
 390 gint RrMinWidth(RrAppearance *a)
 391 {
 392     gint i;
 393     RrSize *m;
 394     gint l, t, r, b;
 395     gint w = 0;
 396
 397     RrMargins(a, &l, &t, &r, &b);
 398
 399     for (i = 0; i < a->textures; ++i) {
 400         switch (a->texture[i].type) {
 401         case RR_TEXTURE_NONE:
 402             break;
 403         case RR_TEXTURE_MASK:
 404             w = MAX(w, a->texture[i].data.mask.mask->width);
 405             break;
 406         case RR_TEXTURE_TEXT:
 407             m = RrFontMeasureString(a->texture[i].data.text.font,
 408                                     a->texture[i].data.text.string,
 409                                     a->texture[i].data.text.shadow_offset_x,
 410                                     a->texture[i].data.text.shadow_offset_y,
 411                                     a->texture[i].data.text.flow,
 412                                     a->texture[i].data.text.maxwidth);
 413             w = MAX(w, m->width);
 414             g_free(m);
 415             break;
 416         case RR_TEXTURE_RGBA:
 417             w += MAX(w, a->texture[i].data.rgba.width);
 418             break;
 419         case RR_TEXTURE_IMAGE:
 420             /* images resize so they don't contribute anything to the min */
 421             break;
 422         case RR_TEXTURE_LINE_ART:
 423             w = MAX(w, MAX(a->texture[i].data.lineart.x1 - l - r,
 424                            a->texture[i].data.lineart.x2 - l - r));
 425             break;
 426         }
 427     }
 428
 429     w += l + r;
 430
 431     if (w < 1) w = 1;
 432     return w;
 433 }
 434
 435 gint RrMinHeight(RrAppearance *a)
 436 {
 437     gint i;
 438     gint l, t, r, b;
 439     RrSize *m;
 440     gint h = 0;
 441
 442     RrMargins(a, &l, &t, &r, &b);
 443
 444     for (i = 0; i < a->textures; ++i) {
 445         switch (a->texture[i].type) {
 446         case RR_TEXTURE_NONE:
 447             break;
 448         case RR_TEXTURE_MASK:
 449             h = MAX(h, a->texture[i].data.mask.mask->height);
 450             break;
 451         case RR_TEXTURE_TEXT:
 452             if (a->texture[i].data.text.flow) {
 453                 g_assert(a->texture[i].data.text.string != NULL);
 454
 455                 m = RrFontMeasureString
 456                     (a->texture[i].data.text.font,
 457                      a->texture[i].data.text.string,
 458                      a->texture[i].data.text.shadow_offset_x,
 459                      a->texture[i].data.text.shadow_offset_y,
 460                      a->texture[i].data.text.flow,
 461                      a->texture[i].data.text.maxwidth);
 462                 h += MAX(h, m->height);
 463                 g_free(m);
 464             }
 465             else
 466                 h += MAX(h,
 467                          RrFontHeight
 468                          (a->texture[i].data.text.font,
 469                           a->texture[i].data.text.shadow_offset_y));
 470             break;
 471         case RR_TEXTURE_RGBA:
 472             h += MAX(h, a->texture[i].data.rgba.height);
 473             break;
 474         case RR_TEXTURE_IMAGE:
 475             /* images resize so they don't contribute anything to the min */
 476             break;
 477         case RR_TEXTURE_LINE_ART:
 478             h = MAX(h, MAX(a->texture[i].data.lineart.y1 - t - b,
 479                            a->texture[i].data.lineart.y2 - t - b));
 480             break;
 481         }
 482     }
 483
 484     h += t + b;
 485
 486     if (h < 1) h = 1;
 487     return h;
 488 }
 489
 490 static void reverse_bits(gchar *c, gint n)
 491 {
 492     gint i;
 493     for (i = 0; i < n; i++, c++)
 494         *c = (((*c * 0x0802UL & 0x22110UL) |
 495                (*c * 0x8020UL & 0x88440UL)) * 0x10101UL) >> 16;
 496 }
 497
 498 gboolean RrPixmapToRGBA(const RrInstance *inst,
 499                         Pixmap pmap, Pixmap mask,
 500                         gint *w, gint *h, RrPixel32 **data)
 501 {
 502     Window xr;
 503     gint xx, xy;
 504     guint pw, ph, mw, mh, xb, xd, i, x, y, di;
 505     XImage *xi, *xm = NULL;
 506
 507     if (!XGetGeometry(RrDisplay(inst), pmap,
 508                       &xr, &xx, &xy, &pw, &ph, &xb, &xd))
 509         return FALSE;
 510
 511     if (mask) {
 512         if (!XGetGeometry(RrDisplay(inst), mask,
 513                           &xr, &xx, &xy, &mw, &mh, &xb, &xd))
 514             return FALSE;
 515         if (pw != mw || ph != mh || xd != 1)
 516             return FALSE;
 517     }
 518
 519     xi = XGetImage(RrDisplay(inst), pmap,
 520                    0, 0, pw, ph, 0xffffffff, ZPixmap);
 521     if (!xi)
 522         return FALSE;
 523
 524     if (mask) {
 525         xm = XGetImage(RrDisplay(inst), mask,
 526                        0, 0, mw, mh, 0xffffffff, ZPixmap);
 527         if (!xm) {
 528             XDestroyImage(xi);
 529             return FALSE;
 530         }
 531         if ((xm->bits_per_pixel == 1) && (xm->bitmap_bit_order != LSBFirst))
 532             reverse_bits(xm->data, xm->bytes_per_line * xm->height);
 533     }
 534
 535     if ((xi->bits_per_pixel == 1) && (xi->bitmap_bit_order != LSBFirst))
 536         reverse_bits(xi->data, xi->bytes_per_line * xi->height);
 537
 538     *data = g_new(RrPixel32, pw * ph);
 539     RrIncreaseDepth(inst, *data, xi);
 540
 541     if (mask) {
 542         /* apply transparency from the mask */
 543         di = 0;
 544         for (i = 0, y = 0; y < ph; ++y) {
 545             for (x = 0; x < pw; ++x, ++i) {
 546                 if (!((((unsigned)xm->data[di + x / 8]) >> (x % 8)) & 0x1))
 547                     (*data)[i] &= ~(0xff << RrDefaultAlphaOffset);
 548             }
 549             di += xm->bytes_per_line;
 550         }
 551     }
 552
 553     *w = pw;
 554     *h = ph;
 555
 556     XDestroyImage(xi);
 557     if (mask)
 558         XDestroyImage(xm);
 559
 560     return TRUE;
 561 }