obrender/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                 narea.x += img->tx;
 139                 narea.width -= img->tx;
 140                 narea.y += img->ty;
 141                 narea.height -= img->ty;
 142                 if (img->twidth)
 143                     narea.width = MIN(narea.width, img->twidth);
 144                 if (img->theight)
 145                     narea.height = MIN(narea.height, img->theight);
 146                 RrImageDrawImage(a->surface.pixel_data,
 147                                  &a->texture[i].data.image,
 148                                  a->w, a->h,
 149                                  &narea);
 150             }
 151             force_transfer = 1;
 152             break;
 153         case RR_TEXTURE_RGBA:
 154             g_assert(!transferred);
 155             {
 156                 RrRect narea = tarea;
 157                 RrTextureRGBA *rgb = &a->texture[i].data.rgba;
 158                 narea.x += rgb->tx;
 159                 narea.width -= rgb->tx;
 160                 narea.y += rgb->ty;
 161                 narea.height -= rgb->ty;
 162                 if (rgb->twidth)
 163                     narea.width = MIN(narea.width, rgb->twidth);
 164                 if (rgb->theight)
 165                     narea.height = MIN(narea.height, rgb->theight);
 166                 RrImageDrawRGBA(a->surface.pixel_data,
 167                                 &a->texture[i].data.rgba,
 168                                 a->w, a->h,
 169                                 &narea);
 170             }
 171             force_transfer = 1;
 172         break;
 173         }
 174     }
 175
 176     if (!transferred) {
 177         transferred = 1;
 178         if ((a->surface.grad != RR_SURFACE_SOLID) || (a->surface.interlaced) ||
 179             force_transfer)
 180         {
 181             pixel_data_to_pixmap(a, 0, 0, w, h);
 182         }
 183     }
 184
 185     return oldp;
 186 }
 187
 188 void RrPaint(RrAppearance *a, Window win, gint w, gint h)
 189 {
 190     Pixmap oldp;
 191
 192     oldp = RrPaintPixmap(a, w, h);
 193     XSetWindowBackgroundPixmap(RrDisplay(a->inst), win, a->pixmap);
 194     XClearWindow(RrDisplay(a->inst), win);
 195     /* free this after changing the visible pixmap */
 196     if (oldp) XFreePixmap(RrDisplay(a->inst), oldp);
 197 }
 198
 199 RrAppearance *RrAppearanceNew(const RrInstance *inst, gint numtex)
 200 {
 201   RrAppearance *out;
 202
 203   out = g_new0(RrAppearance, 1);
 204   out->inst = inst;
 205   out->textures = numtex;
 206   out->surface.bevel_light_adjust = 128;
 207   out->surface.bevel_dark_adjust = 64;
 208   if (numtex) out->texture = g_new0(RrTexture, numtex);
 209
 210   return out;
 211 }
 212
 213 void RrAppearanceRemoveTextures(RrAppearance *a)
 214 {
 215     g_free(a->texture);
 216     a->textures = 0;
 217 }
 218
 219 void RrAppearanceAddTextures(RrAppearance *a, gint numtex)
 220 {
 221     g_assert(a->textures == 0);
 222
 223     a->textures = numtex;
 224     if (numtex) a->texture = g_new0(RrTexture, numtex);
 225 }
 226
 227 void RrAppearanceClearTextures(RrAppearance *a)
 228 {
 229     memset(a->texture, 0, a->textures * sizeof(RrTexture));
 230 }
 231
 232 RrAppearance *RrAppearanceCopy(RrAppearance *orig)
 233 {
 234     RrSurface *spo, *spc;
 235     RrAppearance *copy = g_new(RrAppearance, 1);
 236
 237     copy->inst = orig->inst;
 238
 239     spo = &(orig->surface);
 240     spc = &(copy->surface);
 241     spc->grad = spo->grad;
 242     spc->relief = spo->relief;
 243     spc->bevel = spo->bevel;
 244     if (spo->primary != NULL)
 245         spc->primary = RrColorNew(copy->inst,
 246                                   spo->primary->r,
 247                                   spo->primary->g,
 248                                   spo->primary->b);
 249     else spc->primary = NULL;
 250
 251     if (spo->secondary != NULL)
 252         spc->secondary = RrColorNew(copy->inst,
 253                                     spo->secondary->r,
 254                                     spo->secondary->g,
 255                                     spo->secondary->b);
 256     else spc->secondary = NULL;
 257
 258     if (spo->border_color != NULL)
 259         spc->border_color = RrColorNew(copy->inst,
 260                                        spo->border_color->r,
 261                                        spo->border_color->g,
 262                                        spo->border_color->b);
 263     else spc->border_color = NULL;
 264
 265     if (spo->interlace_color != NULL)
 266         spc->interlace_color = RrColorNew(copy->inst,
 267                                        spo->interlace_color->r,
 268                                        spo->interlace_color->g,
 269                                        spo->interlace_color->b);
 270     else spc->interlace_color = NULL;
 271
 272     if (spo->bevel_dark != NULL)
 273         spc->bevel_dark = RrColorNew(copy->inst,
 274                                      spo->bevel_dark->r,
 275                                      spo->bevel_dark->g,
 276                                      spo->bevel_dark->b);
 277     else spc->bevel_dark = NULL;
 278
 279     if (spo->bevel_light != NULL)
 280         spc->bevel_light = RrColorNew(copy->inst,
 281                                       spo->bevel_light->r,
 282                                       spo->bevel_light->g,
 283                                       spo->bevel_light->b);
 284     else spc->bevel_light = NULL;
 285
 286     if (spo->split_primary != NULL)
 287         spc->split_primary = RrColorNew(copy->inst,
 288                                         spo->split_primary->r,
 289                                         spo->split_primary->g,
 290                                         spo->split_primary->b);
 291     else spc->split_primary = NULL;
 292
 293     if (spo->split_secondary != NULL)
 294         spc->split_secondary = RrColorNew(copy->inst,
 295                                         spo->split_secondary->r,
 296                                         spo->split_secondary->g,
 297                                         spo->split_secondary->b);
 298     else spc->split_secondary = NULL;
 299
 300     spc->interlaced = spo->interlaced;
 301     spc->bevel_light_adjust = spo->bevel_light_adjust;
 302     spc->bevel_dark_adjust = spo->bevel_dark_adjust;
 303     spc->border = spo->border;
 304     spc->parent = NULL;
 305     spc->parentx = spc->parenty = 0;
 306     spc->pixel_data = NULL;
 307
 308     copy->textures = orig->textures;
 309     copy->texture = g_memdup(orig->texture,
 310                              orig->textures * sizeof(RrTexture));
 311     copy->pixmap = None;
 312     copy->xftdraw = NULL;
 313     copy->w = copy->h = 0;
 314     return copy;
 315 }
 316
 317 void RrAppearanceFree(RrAppearance *a)
 318 {
 319     if (a) {
 320         RrSurface *p;
 321         if (a->pixmap != None) XFreePixmap(RrDisplay(a->inst), a->pixmap);
 322         if (a->xftdraw != NULL) XftDrawDestroy(a->xftdraw);
 323         if (a->textures)
 324             g_free(a->texture);
 325         p = &a->surface;
 326         RrColorFree(p->primary);
 327         RrColorFree(p->secondary);
 328         RrColorFree(p->border_color);
 329         RrColorFree(p->interlace_color);
 330         RrColorFree(p->bevel_dark);
 331         RrColorFree(p->bevel_light);
 332         RrColorFree(p->split_primary);
 333         RrColorFree(p->split_secondary);
 334         g_free(p->pixel_data);
 335         p->pixel_data = NULL;
 336         g_free(a);
 337     }
 338 }
 339
 340 static void pixel_data_to_pixmap(RrAppearance *l,
 341                                  gint x, gint y, gint w, gint h)
 342 {
 343     RrPixel32 *in, *scratch;
 344     Pixmap out;
 345     XImage *im = NULL;
 346     im = XCreateImage(RrDisplay(l->inst), RrVisual(l->inst), RrDepth(l->inst),
 347                       ZPixmap, 0, NULL, w, h, 32, 0);
 348     g_assert(im != NULL);
 349
 350     in = l->surface.pixel_data;
 351     out = l->pixmap;
 352
 353 /* this malloc is a complete waste of time on normal 32bpp
 354    as reduce_depth just sets im->data = data and returns
 355 */
 356     scratch = g_new(RrPixel32, im->width * im->height);
 357     im->data = (gchar*) scratch;
 358     RrReduceDepth(l->inst, in, im);
 359     XPutImage(RrDisplay(l->inst), out,
 360               DefaultGC(RrDisplay(l->inst), RrScreen(l->inst)),
 361               im, 0, 0, x, y, w, h);
 362     im->data = NULL;
 363     XDestroyImage(im);
 364     g_free(scratch);
 365 }
 366
 367 void RrMargins (RrAppearance *a, gint *l, gint *t, gint *r, gint *b)
 368 {
 369     *l = *t = *r = *b = 0;
 370
 371     if (a->surface.grad != RR_SURFACE_PARENTREL) {
 372         if (a->surface.relief != RR_RELIEF_FLAT) {
 373             switch (a->surface.bevel) {
 374             case RR_BEVEL_1:
 375                 *l = *t = *r = *b = 1;
 376                 break;
 377             case RR_BEVEL_2:
 378                 *l = *t = *r = *b = 2;
 379                 break;
 380             }
 381         } else if (a->surface.border) {
 382             *l = *t = *r = *b = 1;
 383         }
 384     }
 385 }
 386
 387 void RrMinSize(RrAppearance *a, gint *w, gint *h)
 388 {
 389     *w = RrMinWidth(a);
 390     *h = RrMinHeight(a);
 391 }
 392
 393 gint RrMinWidth(RrAppearance *a)
 394 {
 395     gint i;
 396     RrSize *m;
 397     gint l, t, r, b;
 398     gint w = 0;
 399
 400     RrMargins(a, &l, &t, &r, &b);
 401
 402     for (i = 0; i < a->textures; ++i) {
 403         switch (a->texture[i].type) {
 404         case RR_TEXTURE_NONE:
 405             break;
 406         case RR_TEXTURE_MASK:
 407             w = MAX(w, a->texture[i].data.mask.mask->width);
 408             break;
 409         case RR_TEXTURE_TEXT:
 410             m = RrFontMeasureString(a->texture[i].data.text.font,
 411                                     a->texture[i].data.text.string,
 412                                     a->texture[i].data.text.shadow_offset_x,
 413                                     a->texture[i].data.text.shadow_offset_y,
 414                                     a->texture[i].data.text.flow,
 415                                     a->texture[i].data.text.maxwidth);
 416             w = MAX(w, m->width);
 417             g_free(m);
 418             break;
 419         case RR_TEXTURE_RGBA:
 420             w += MAX(w, a->texture[i].data.rgba.width);
 421             break;
 422         case RR_TEXTURE_IMAGE:
 423             /* images resize so they don't contribute anything to the min */
 424             break;
 425         case RR_TEXTURE_LINE_ART:
 426             w = MAX(w, MAX(a->texture[i].data.lineart.x1 - l - r,
 427                            a->texture[i].data.lineart.x2 - l - r));
 428             break;
 429         }
 430     }
 431
 432     w += l + r;
 433
 434     if (w < 1) w = 1;
 435     return w;
 436 }
 437
 438 gint RrMinHeight(RrAppearance *a)
 439 {
 440     gint i;
 441     gint l, t, r, b;
 442     RrSize *m;
 443     gint h = 0;
 444
 445     RrMargins(a, &l, &t, &r, &b);
 446
 447     for (i = 0; i < a->textures; ++i) {
 448         switch (a->texture[i].type) {
 449         case RR_TEXTURE_NONE:
 450             break;
 451         case RR_TEXTURE_MASK:
 452             h = MAX(h, a->texture[i].data.mask.mask->height);
 453             break;
 454         case RR_TEXTURE_TEXT:
 455             if (a->texture[i].data.text.flow) {
 456                 g_assert(a->texture[i].data.text.string != NULL);
 457
 458                 m = RrFontMeasureString
 459                     (a->texture[i].data.text.font,
 460                      a->texture[i].data.text.string,
 461                      a->texture[i].data.text.shadow_offset_x,
 462                      a->texture[i].data.text.shadow_offset_y,
 463                      a->texture[i].data.text.flow,
 464                      a->texture[i].data.text.maxwidth);
 465                 h += MAX(h, m->height);
 466                 g_free(m);
 467             }
 468             else
 469                 h += MAX(h,
 470                          RrFontHeight
 471                          (a->texture[i].data.text.font,
 472                           a->texture[i].data.text.shadow_offset_y));
 473             break;
 474         case RR_TEXTURE_RGBA:
 475             h += MAX(h, a->texture[i].data.rgba.height);
 476             break;
 477         case RR_TEXTURE_IMAGE:
 478             /* images resize so they don't contribute anything to the min */
 479             break;
 480         case RR_TEXTURE_LINE_ART:
 481             h = MAX(h, MAX(a->texture[i].data.lineart.y1 - t - b,
 482                            a->texture[i].data.lineart.y2 - t - b));
 483             break;
 484         }
 485     }
 486
 487     h += t + b;
 488
 489     if (h < 1) h = 1;
 490     return h;
 491 }
 492
 493 static void reverse_bits(gchar *c, gint n)
 494 {
 495     gint i;
 496     for (i = 0; i < n; i++, c++)
 497         *c = (((*c * 0x0802UL & 0x22110UL) |
 498                (*c * 0x8020UL & 0x88440UL)) * 0x10101UL) >> 16;
 499 }
 500
 501 gboolean RrPixmapToRGBA(const RrInstance *inst,
 502                         Pixmap pmap, Pixmap mask,
 503                         gint *w, gint *h, RrPixel32 **data)
 504 {
 505     Window xr;
 506     gint xx, xy;
 507     guint pw, ph, mw, mh, xb, xd, i, x, y, di;
 508     XImage *xi, *xm = NULL;
 509
 510     if (!XGetGeometry(RrDisplay(inst), pmap,
 511                       &xr, &xx, &xy, &pw, &ph, &xb, &xd))
 512         return FALSE;
 513
 514     if (mask) {
 515         if (!XGetGeometry(RrDisplay(inst), mask,
 516                           &xr, &xx, &xy, &mw, &mh, &xb, &xd))
 517             return FALSE;
 518         if (pw != mw || ph != mh || xd != 1)
 519             return FALSE;
 520     }
 521
 522     xi = XGetImage(RrDisplay(inst), pmap,
 523                    0, 0, pw, ph, 0xffffffff, ZPixmap);
 524     if (!xi)
 525         return FALSE;
 526
 527     if (mask) {
 528         xm = XGetImage(RrDisplay(inst), mask,
 529                        0, 0, mw, mh, 0xffffffff, ZPixmap);
 530         if (!xm) {
 531             XDestroyImage(xi);
 532             return FALSE;
 533         }
 534         if ((xm->bits_per_pixel == 1) && (xm->bitmap_bit_order != LSBFirst))
 535             reverse_bits(xm->data, xm->bytes_per_line * xm->height);
 536     }
 537
 538     if ((xi->bits_per_pixel == 1) && (xi->bitmap_bit_order != LSBFirst))
 539         reverse_bits(xi->data, xi->bytes_per_line * xi->height);
 540
 541     *data = g_new(RrPixel32, pw * ph);
 542     RrIncreaseDepth(inst, *data, xi);
 543
 544     if (mask) {
 545         /* apply transparency from the mask */
 546         di = 0;
 547         for (i = 0, y = 0; y < ph; ++y) {
 548             for (x = 0; x < pw; ++x, ++i) {
 549                 if (!((((unsigned)xm->data[di + x / 8]) >> (x % 8)) & 0x1))
 550                     (*data)[i] &= ~(0xff << RrDefaultAlphaOffset);
 551             }
 552             di += xm->bytes_per_line;
 553         }
 554     }
 555
 556     *w = pw;
 557     *h = ph;
 558
 559     XDestroyImage(xi);
 560     if (mask)
 561         XDestroyImage(xm);
 562
 563     return TRUE;
 564 }