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