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 static void pixel_data_to_pixmap(RrAppearance *l,
 337                                  gint x, gint y, gint w, gint h)
 338 {
 339     RrPixel32 *in, *scratch;
 340     Pixmap out;
 341     XImage *im = NULL;
 342     im = XCreateImage(RrDisplay(l->inst), RrVisual(l->inst), RrDepth(l->inst),
 343                       ZPixmap, 0, NULL, w, h, 32, 0);
 344     g_assert(im != NULL);
 345
 346     in = l->surface.pixel_data;
 347     out = l->pixmap;
 348
 349 /* this malloc is a complete waste of time on normal 32bpp
 350    as reduce_depth just sets im->data = data and returns
 351 */
 352     scratch = g_new(RrPixel32, im->width * im->height);
 353     im->data = (gchar*) scratch;
 354     RrReduceDepth(l->inst, in, im);
 355     XPutImage(RrDisplay(l->inst), out,
 356               DefaultGC(RrDisplay(l->inst), RrScreen(l->inst)),
 357               im, 0, 0, x, y, w, h);
 358     im->data = NULL;
 359     XDestroyImage(im);
 360     g_free(scratch);
 361 }
 362
 363 void RrMargins (RrAppearance *a, gint *l, gint *t, gint *r, gint *b)
 364 {
 365     *l = *t = *r = *b = 0;
 366
 367     if (a->surface.grad != RR_SURFACE_PARENTREL) {
 368         if (a->surface.relief != RR_RELIEF_FLAT) {
 369             switch (a->surface.bevel) {
 370             case RR_BEVEL_1:
 371                 *l = *t = *r = *b = 1;
 372                 break;
 373             case RR_BEVEL_2:
 374                 *l = *t = *r = *b = 2;
 375                 break;
 376             }
 377         } else if (a->surface.border) {
 378             *l = *t = *r = *b = 1;
 379         }
 380     }
 381 }
 382
 383 void RrMinSize(RrAppearance *a, gint *w, gint *h)
 384 {
 385     *w = RrMinWidth(a);
 386     *h = RrMinHeight(a);
 387 }
 388
 389 gint RrMinWidth(RrAppearance *a)
 390 {
 391     gint i;
 392     RrSize *m;
 393     gint l, t, r, b;
 394     gint w = 0;
 395
 396     RrMargins(a, &l, &t, &r, &b);
 397
 398     for (i = 0; i < a->textures; ++i) {
 399         switch (a->texture[i].type) {
 400         case RR_TEXTURE_NONE:
 401             break;
 402         case RR_TEXTURE_MASK:
 403             w = MAX(w, a->texture[i].data.mask.mask->width);
 404             break;
 405         case RR_TEXTURE_TEXT:
 406             m = RrFontMeasureString(a->texture[i].data.text.font,
 407                                     a->texture[i].data.text.string,
 408                                     a->texture[i].data.text.shadow_offset_x,
 409                                     a->texture[i].data.text.shadow_offset_y,
 410                                     a->texture[i].data.text.flow,
 411                                     a->texture[i].data.text.maxwidth);
 412             w = MAX(w, m->width);
 413             g_free(m);
 414             break;
 415         case RR_TEXTURE_RGBA:
 416             w += MAX(w, a->texture[i].data.rgba.width);
 417             break;
 418         case RR_TEXTURE_IMAGE:
 419             /* images resize so they don't contribute anything to the min */
 420             break;
 421         case RR_TEXTURE_LINE_ART:
 422             w = MAX(w, MAX(a->texture[i].data.lineart.x1 - l - r,
 423                            a->texture[i].data.lineart.x2 - l - r));
 424             break;
 425         }
 426     }
 427
 428     w += l + r;
 429
 430     if (w < 1) w = 1;
 431     return w;
 432 }
 433
 434 gint RrMinHeight(RrAppearance *a)
 435 {
 436     gint i;
 437     gint l, t, r, b;
 438     RrSize *m;
 439     gint h = 0;
 440
 441     RrMargins(a, &l, &t, &r, &b);
 442
 443     for (i = 0; i < a->textures; ++i) {
 444         switch (a->texture[i].type) {
 445         case RR_TEXTURE_NONE:
 446             break;
 447         case RR_TEXTURE_MASK:
 448             h = MAX(h, a->texture[i].data.mask.mask->height);
 449             break;
 450         case RR_TEXTURE_TEXT:
 451             if (a->texture[i].data.text.flow) {
 452                 g_assert(a->texture[i].data.text.string != NULL);
 453
 454                 m = RrFontMeasureString
 455                     (a->texture[i].data.text.font,
 456                      a->texture[i].data.text.string,
 457                      a->texture[i].data.text.shadow_offset_x,
 458                      a->texture[i].data.text.shadow_offset_y,
 459                      a->texture[i].data.text.flow,
 460                      a->texture[i].data.text.maxwidth);
 461                 h += MAX(h, m->height);
 462                 g_free(m);
 463             }
 464             else
 465                 h += MAX(h,
 466                          RrFontHeight
 467                          (a->texture[i].data.text.font,
 468                           a->texture[i].data.text.shadow_offset_y));
 469             break;
 470         case RR_TEXTURE_RGBA:
 471             h += MAX(h, a->texture[i].data.rgba.height);
 472             break;
 473         case RR_TEXTURE_IMAGE:
 474             /* images resize so they don't contribute anything to the min */
 475             break;
 476         case RR_TEXTURE_LINE_ART:
 477             h = MAX(h, MAX(a->texture[i].data.lineart.y1 - t - b,
 478                            a->texture[i].data.lineart.y2 - t - b));
 479             break;
 480         }
 481     }
 482
 483     h += t + b;
 484
 485     if (h < 1) h = 1;
 486     return h;
 487 }
 488
 489 static void reverse_bits(gchar *c, gint n)
 490 {
 491     gint i;
 492     for (i = 0; i < n; i++, c++)
 493         *c = (((*c * 0x0802UL & 0x22110UL) |
 494                (*c * 0x8020UL & 0x88440UL)) * 0x10101UL) >> 16;
 495 }
 496
 497 gboolean RrPixmapToRGBA(const RrInstance *inst,
 498                         Pixmap pmap, Pixmap mask,
 499                         gint *w, gint *h, RrPixel32 **data)
 500 {
 501     Window xr;
 502     gint xx, xy;
 503     guint pw, ph, mw, mh, xb, xd, i, x, y, di;
 504     XImage *xi, *xm = NULL;
 505
 506     if (!XGetGeometry(RrDisplay(inst), pmap,
 507                       &xr, &xx, &xy, &pw, &ph, &xb, &xd))
 508         return FALSE;
 509
 510     if (mask) {
 511         if (!XGetGeometry(RrDisplay(inst), mask,
 512                           &xr, &xx, &xy, &mw, &mh, &xb, &xd))
 513             return FALSE;
 514         if (pw != mw || ph != mh || xd != 1)
 515             return FALSE;
 516     }
 517
 518     xi = XGetImage(RrDisplay(inst), pmap,
 519                    0, 0, pw, ph, 0xffffffff, ZPixmap);
 520     if (!xi)
 521         return FALSE;
 522
 523     if (mask) {
 524         xm = XGetImage(RrDisplay(inst), mask,
 525                        0, 0, mw, mh, 0xffffffff, ZPixmap);
 526         if (!xm) {
 527             XDestroyImage(xi);
 528             return FALSE;
 529         }
 530         if ((xm->bits_per_pixel == 1) && (xm->bitmap_bit_order != LSBFirst))
 531             reverse_bits(xm->data, xm->bytes_per_line * xm->height);
 532     }
 533
 534     if ((xi->bits_per_pixel == 1) && (xi->bitmap_bit_order != LSBFirst))
 535         reverse_bits(xi->data, xi->bytes_per_line * xi->height);
 536
 537     *data = g_new(RrPixel32, pw * ph);
 538     RrIncreaseDepth(inst, *data, xi);
 539
 540     if (mask) {
 541         /* apply transparency from the mask */
 542         di = 0;
 543         for (i = 0, y = 0; y < ph; ++y) {
 544             for (x = 0; x < pw; ++x, ++i) {
 545                 if (!((((unsigned)xm->data[di + x / 8]) >> (x % 8)) & 0x1))
 546                     (*data)[i] &= ~(0xff << RrDefaultAlphaOffset);
 547             }
 548             di += xm->bytes_per_line;
 549         }
 550     }
 551
 552     *w = pw;
 553     *h = ph;
 554
 555     XDestroyImage(xi);
 556     if (mask)
 557         XDestroyImage(xm);
 558
 559     return TRUE;
 560 }