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