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 <X11/Xlib.h>
  22 #include <X11/Xutil.h>
  23
  24 #include "render.h"
  25 #include "gradient.h"
  26 #include "font.h"
  27 #include "mask.h"
  28 #include "color.h"
  29 #include "image.h"
  30 #include "theme.h"
  31
  32 #include <glib.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, sw, sh, partial_w, partial_h;
  44     RrPixel32 *source, *dest;
  45     Pixmap oldp;
  46     RrRect tarea; /* area in which to draw textures */
  47     gboolean resized;
  48
  49     if (w <= 0 || h <= 0) return None;
  50
  51     if (a->surface.parentx < 0 || a->surface.parenty < 0) {
  52         /* ob_debug("Invalid parent co-ordinates\n"); */
  53         return None;
  54     }
  55
  56     if (a->surface.grad == RR_SURFACE_PARENTREL &&
  57         (a->surface.parentx >= a->surface.parent->w ||
  58          a->surface.parenty >= a->surface.parent->h))
  59     {
  60         return None;
  61     }
  62
  63     resized = (a->w != w || a->h != h);
  64
  65     oldp = a->pixmap; /* save to free after changing the visible pixmap */
  66     a->pixmap = XCreatePixmap(RrDisplay(a->inst),
  67                               RrRootWindow(a->inst),
  68                               w, h, RrDepth(a->inst));
  69
  70     g_assert(a->pixmap != None);
  71     a->w = w;
  72     a->h = h;
  73
  74     if (a->xftdraw != NULL)
  75         XftDrawDestroy(a->xftdraw);
  76     a->xftdraw = XftDrawCreate(RrDisplay(a->inst), a->pixmap,
  77                                RrVisual(a->inst), RrColormap(a->inst));
  78     g_assert(a->xftdraw != NULL);
  79
  80     g_free(a->surface.pixel_data);
  81     a->surface.pixel_data = g_new(RrPixel32, w * h);
  82
  83     if (a->surface.grad == RR_SURFACE_PARENTREL) {
  84         g_assert (a->surface.parent);
  85         g_assert (a->surface.parent->w);
  86
  87         sw = a->surface.parent->w;
  88         sh = a->surface.parent->h;
  89
  90         source = (a->surface.parent->surface.pixel_data +
  91                   a->surface.parentx + sw * a->surface.parenty);
  92         dest = a->surface.pixel_data;
  93
  94         if (a->surface.parentx + w > sw) {
  95             partial_w = sw - a->surface.parentx;
  96         } else partial_w = w;
  97
  98         if (a->surface.parenty + h > sh) {
  99             partial_h = sh - a->surface.parenty;
 100         } else partial_h = h;
 101
 102         for (i = 0; i < partial_h; i++, source += sw, dest += w) {
 103             memcpy(dest, source, partial_w * sizeof(RrPixel32));
 104         }
 105     } else
 106         RrRender(a, w, h);
 107
 108     {
 109         gint l, t, r, b;
 110         RrMargins(a, &l, &t, &r, &b);
 111         RECT_SET(tarea, l, t, w - l - r, h - t - b);
 112     }
 113
 114     for (i = 0; i < a->textures; i++) {
 115         switch (a->texture[i].type) {
 116         case RR_TEXTURE_NONE:
 117             break;
 118         case RR_TEXTURE_TEXT:
 119             if (!transferred) {
 120                 transferred = 1;
 121                 if ((a->surface.grad != RR_SURFACE_SOLID)
 122                     || (a->surface.interlaced))
 123                     pixel_data_to_pixmap(a, 0, 0, w, h);
 124             }
 125             if (a->xftdraw == NULL) {
 126                 a->xftdraw = XftDrawCreate(RrDisplay(a->inst), a->pixmap,
 127                                            RrVisual(a->inst),
 128                                            RrColormap(a->inst));
 129             }
 130             RrFontDraw(a->xftdraw, &a->texture[i].data.text, &tarea);
 131             break;
 132         case RR_TEXTURE_LINE_ART:
 133             if (!transferred) {
 134                 transferred = 1;
 135                 if ((a->surface.grad != RR_SURFACE_SOLID)
 136                     || (a->surface.interlaced))
 137                     pixel_data_to_pixmap(a, 0, 0, w, h);
 138             }
 139             XDrawLine(RrDisplay(a->inst), a->pixmap,
 140                       RrColorGC(a->texture[i].data.lineart.color),
 141                       a->texture[i].data.lineart.x1,
 142                       a->texture[i].data.lineart.y1,
 143                       a->texture[i].data.lineart.x2,
 144                       a->texture[i].data.lineart.y2);
 145             break;
 146         case RR_TEXTURE_MASK:
 147             if (!transferred) {
 148                 transferred = 1;
 149                 if ((a->surface.grad != RR_SURFACE_SOLID)
 150                     || (a->surface.interlaced))
 151                     pixel_data_to_pixmap(a, 0, 0, w, h);
 152             }
 153             RrPixmapMaskDraw(a->pixmap, &a->texture[i].data.mask, &tarea);
 154             break;
 155         case RR_TEXTURE_RGBA:
 156             g_assert(!transferred);
 157             RrImageDraw(a->surface.pixel_data,
 158                         &a->texture[i].data.rgba,
 159                         a->w, a->h,
 160                         &tarea);
 161         break;
 162         }
 163     }
 164
 165     if (!transferred) {
 166         transferred = 1;
 167         if ((a->surface.grad != RR_SURFACE_SOLID) || (a->surface.interlaced))
 168             pixel_data_to_pixmap(a, 0, 0, w, h);
 169     }
 170
 171     return oldp;
 172 }
 173
 174 void RrPaint(RrAppearance *a, Window win, gint w, gint h)
 175 {
 176     Pixmap oldp;
 177
 178     oldp = RrPaintPixmap(a, w, h);
 179     XSetWindowBackgroundPixmap(RrDisplay(a->inst), win, a->pixmap);
 180     XClearWindow(RrDisplay(a->inst), win);
 181     /* free this after changing the visible pixmap */
 182     if (oldp) XFreePixmap(RrDisplay(a->inst), oldp);
 183 }
 184
 185 RrAppearance *RrAppearanceNew(const RrInstance *inst, gint numtex)
 186 {
 187   RrAppearance *out;
 188
 189   out = g_new0(RrAppearance, 1);
 190   out->inst = inst;
 191   out->textures = numtex;
 192   if (numtex) out->texture = g_new0(RrTexture, numtex);
 193
 194   return out;
 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     spc->interlaced = spo->interlaced;
 253     spc->border = spo->border;
 254     spc->parent = NULL;
 255     spc->parentx = spc->parenty = 0;
 256     spc->pixel_data = NULL;
 257
 258     copy->textures = orig->textures;
 259     copy->texture = g_memdup(orig->texture,
 260                              orig->textures * sizeof(RrTexture));
 261     for (i = 0; i < copy->textures; ++i)
 262         if (copy->texture[i].type == RR_TEXTURE_RGBA) {
 263             copy->texture[i].data.rgba.cache = NULL;
 264         }
 265     copy->pixmap = None;
 266     copy->xftdraw = NULL;
 267     copy->w = copy->h = 0;
 268     return copy;
 269 }
 270
 271 void RrAppearanceFree(RrAppearance *a)
 272 {
 273     gint i;
 274
 275     if (a) {
 276         RrSurface *p;
 277         if (a->pixmap != None) XFreePixmap(RrDisplay(a->inst), a->pixmap);
 278         if (a->xftdraw != NULL) XftDrawDestroy(a->xftdraw);
 279         for (i = 0; i < a->textures; ++i)
 280             if (a->texture[i].type == RR_TEXTURE_RGBA) {
 281                 g_free(a->texture[i].data.rgba.cache);
 282                 a->texture[i].data.rgba.cache = NULL;
 283             }
 284         if (a->textures)
 285             g_free(a->texture);
 286         p = &a->surface;
 287         RrColorFree(p->primary);
 288         RrColorFree(p->secondary);
 289         RrColorFree(p->border_color);
 290         RrColorFree(p->interlace_color);
 291         RrColorFree(p->bevel_dark);
 292         RrColorFree(p->bevel_light);
 293         g_free(p->pixel_data);
 294         p->pixel_data = NULL;
 295         g_free(a);
 296     }
 297 }
 298
 299
 300 static void pixel_data_to_pixmap(RrAppearance *l,
 301                                  gint x, gint y, gint w, gint h)
 302 {
 303     RrPixel32 *in, *scratch;
 304     Pixmap out;
 305     XImage *im = NULL;
 306     im = XCreateImage(RrDisplay(l->inst), RrVisual(l->inst), RrDepth(l->inst),
 307                       ZPixmap, 0, NULL, w, h, 32, 0);
 308     g_assert(im != NULL);
 309
 310     in = l->surface.pixel_data;
 311     out = l->pixmap;
 312
 313 /* this malloc is a complete waste of time on normal 32bpp
 314    as reduce_depth just sets im->data = data and returns
 315 */
 316     scratch = g_new(RrPixel32, im->width * im->height);
 317     im->data = (gchar*) scratch;
 318     RrReduceDepth(l->inst, in, im);
 319     XPutImage(RrDisplay(l->inst), out,
 320               DefaultGC(RrDisplay(l->inst), RrScreen(l->inst)),
 321               im, 0, 0, x, y, w, h);
 322     im->data = NULL;
 323     XDestroyImage(im);
 324     g_free(scratch);
 325 }
 326
 327 void RrMargins (RrAppearance *a, gint *l, gint *t, gint *r, gint *b)
 328 {
 329     *l = *t = *r = *b = 0;
 330
 331     if (a->surface.grad != RR_SURFACE_PARENTREL) {
 332         if (a->surface.relief != RR_RELIEF_FLAT) {
 333             switch (a->surface.bevel) {
 334             case RR_BEVEL_1:
 335                 *l = *t = *r = *b = 1;
 336                 break;
 337             case RR_BEVEL_2:
 338                 *l = *t = *r = *b = 2;
 339                 break;
 340             }
 341         } else if (a->surface.border) {
 342             *l = *t = *r = *b = 1;
 343         }
 344     }
 345 }
 346
 347 void RrMinSize(RrAppearance *a, gint *w, gint *h)
 348 {
 349     *w = RrMinWidth(a);
 350     *h = RrMinHeight(a);
 351 }
 352
 353 gint RrMinWidth(RrAppearance *a)
 354 {
 355     gint i;
 356     RrSize *m;
 357     gint l, t, r, b;
 358     gint w = 0;
 359
 360     for (i = 0; i < a->textures; ++i) {
 361         switch (a->texture[i].type) {
 362         case RR_TEXTURE_NONE:
 363             break;
 364         case RR_TEXTURE_MASK:
 365             w = MAX(w, a->texture[i].data.mask.mask->width);
 366             break;
 367         case RR_TEXTURE_TEXT:
 368             m = RrFontMeasureString(a->texture[i].data.text.font,
 369                                     a->texture[i].data.text.string,
 370                                     a->texture[i].data.text.shadow_offset_x,
 371                                     a->texture[i].data.text.shadow_offset_y);
 372             w = MAX(w, m->width + 4);
 373             g_free(m);
 374             break;
 375         case RR_TEXTURE_RGBA:
 376             w += MAX(w, a->texture[i].data.rgba.width);
 377             break;
 378         case RR_TEXTURE_LINE_ART:
 379             w += MAX(w, MAX(a->texture[i].data.lineart.x1,
 380                             a->texture[i].data.lineart.x2));
 381             break;
 382         }
 383     }
 384
 385     RrMargins(a, &l, &t, &r, &b);
 386
 387     w += l + r;
 388
 389     if (w < 1) w = 1;
 390     return w;
 391 }
 392
 393 gint RrMinHeight(RrAppearance *a)
 394 {
 395     gint i;
 396     gint l, t, r, b;
 397     gint h = 0;
 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             h = MAX(h, a->texture[i].data.mask.mask->height);
 405             break;
 406         case RR_TEXTURE_TEXT:
 407             h += MAX(h, RrFontHeight(a->texture[i].data.text.font,
 408                                      a->texture[i].data.text.shadow_offset_y));
 409             break;
 410         case RR_TEXTURE_RGBA:
 411             h += MAX(h, a->texture[i].data.rgba.height);
 412             break;
 413         case RR_TEXTURE_LINE_ART:
 414             h += MAX(h, MAX(a->texture[i].data.lineart.y1,
 415                             a->texture[i].data.lineart.y2));
 416             break;
 417         }
 418     }
 419
 420     RrMargins(a, &l, &t, &r, &b);
 421
 422     h += t + b;
 423
 424     if (h < 1) h = 1;
 425     return h;
 426 }
 427
 428 static void reverse_bits(gchar *c, gint n)
 429 {
 430     gint i;
 431     for (i = 0; i < n; i++, c++)
 432         *c = (((*c * 0x0802UL & 0x22110UL) |
 433                (*c * 0x8020UL & 0x88440UL)) * 0x10101UL) >> 16;
 434 }
 435
 436 gboolean RrPixmapToRGBA(const RrInstance *inst,
 437                         Pixmap pmap, Pixmap mask,
 438                         gint *w, gint *h, RrPixel32 **data)
 439 {
 440     Window xr;
 441     gint xx, xy;
 442     guint pw, ph, mw, mh, xb, xd, i, x, y, di;
 443     XImage *xi, *xm = NULL;
 444
 445     if (!XGetGeometry(RrDisplay(inst), pmap,
 446                       &xr, &xx, &xy, &pw, &ph, &xb, &xd))
 447         return FALSE;
 448
 449     if (mask) {
 450         if (!XGetGeometry(RrDisplay(inst), mask,
 451                           &xr, &xx, &xy, &mw, &mh, &xb, &xd))
 452             return FALSE;
 453         if (pw != mw || ph != mh || xd != 1)
 454             return FALSE;
 455     }
 456
 457     xi = XGetImage(RrDisplay(inst), pmap,
 458                    0, 0, pw, ph, 0xffffffff, ZPixmap);
 459     if (!xi)
 460         return FALSE;
 461
 462     if (mask) {
 463         xm = XGetImage(RrDisplay(inst), mask,
 464                        0, 0, mw, mh, 0xffffffff, ZPixmap);
 465         if (!xm) {
 466             XDestroyImage(xi);
 467             return FALSE;
 468         }
 469         if ((xm->bits_per_pixel == 1) && (xm->bitmap_bit_order != LSBFirst))
 470             reverse_bits(xm->data, xm->bytes_per_line * xm->height);
 471     }
 472
 473     if ((xi->bits_per_pixel == 1) && (xi->bitmap_bit_order != LSBFirst))
 474         reverse_bits(xi->data, xi->bytes_per_line * xi->height);
 475
 476     *data = g_new(RrPixel32, pw * ph);
 477     RrIncreaseDepth(inst, *data, xi);
 478
 479     if (mask) {
 480         /* apply transparency from the mask */
 481         di = 0;
 482         for (i = 0, y = 0; y < ph; ++y) {
 483             for (x = 0; x < pw; ++x, ++i) {
 484                 if (!((((unsigned)xm->data[di + x / 8]) >> (x % 8)) & 0x1))
 485                     (*data)[i] &= ~(0xff << RrDefaultAlphaOffset);
 486             }
 487             di += xm->bytes_per_line;
 488         }
 489     }
 490
 491     *w = pw;
 492     *h = ph;
 493
 494     XDestroyImage(xi);
 495     if (mask)
 496         XDestroyImage(xm);
 497
 498     return TRUE;
 499 }