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) 2003        Ben Jansens
   5    Copyright (c) 2003        Derek Foreman
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    See the COPYING file for a copy of the GNU General Public License.
  18 */
  19
  20 #include <X11/Xlib.h>
  21 #include <X11/Xutil.h>
  22
  23 #include "render.h"
  24 #include "gradient.h"
  25 #include "font.h"
  26 #include "mask.h"
  27 #include "color.h"
  28 #include "image.h"
  29 #include "theme.h"
  30
  31 #include <glib.h>
  32
  33 #ifdef HAVE_STDLIB_H
  34 #  include <stdlib.h>
  35 #endif
  36
  37 static void pixel_data_to_pixmap(RrAppearance *l,
  38                                  gint x, gint y, gint w, gint h);
  39
  40 void RrPaint(RrAppearance *a, Window win, gint w, gint h)
  41 {
  42     gint i, transferred = 0, sw, sh, partial_w, partial_h;
  43     RrPixel32 *source, *dest;
  44     Pixmap oldp;
  45     RrRect tarea; /* area in which to draw textures */
  46     gboolean resized;
  47
  48     if (w <= 0 || h <= 0) return;
  49
  50     if (a->surface.parentx < 0 || a->surface.parenty < 0) {
  51         /* ob_debug("Invalid parent co-ordinates\n"); */
  52         return;
  53     }
  54     resized = (a->w != w || a->h != h);
  55
  56     oldp = a->pixmap; /* save to free after changing the visible pixmap */
  57     a->pixmap = XCreatePixmap(RrDisplay(a->inst),
  58                               RrRootWindow(a->inst),
  59                               w, h, RrDepth(a->inst));
  60
  61     g_assert(a->pixmap != None);
  62     a->w = w;
  63     a->h = h;
  64
  65     if (a->xftdraw != NULL)
  66         XftDrawDestroy(a->xftdraw);
  67     a->xftdraw = XftDrawCreate(RrDisplay(a->inst), a->pixmap,
  68                                RrVisual(a->inst), RrColormap(a->inst));
  69     g_assert(a->xftdraw != NULL);
  70
  71     g_free(a->surface.pixel_data);
  72     a->surface.pixel_data = g_new(RrPixel32, w * h);
  73
  74     if (a->surface.grad == RR_SURFACE_PARENTREL) {
  75         g_assert (a->surface.parent);
  76         g_assert (a->surface.parent->w);
  77
  78         sw = a->surface.parent->w;
  79         sh = a->surface.parent->h;
  80
  81         if (a->surface.parentx >= sw || a->surface.parenty >= sh) {
  82             return;
  83         }
  84
  85         source = (a->surface.parent->surface.pixel_data +
  86                   a->surface.parentx + sw * a->surface.parenty);
  87         dest = a->surface.pixel_data;
  88
  89         if (a->surface.parentx + w > sw) {
  90             partial_w = sw - a->surface.parentx;
  91         } else partial_w = w;
  92
  93         if (a->surface.parenty + h > sh) {
  94             partial_h = sh - a->surface.parenty;
  95         } else partial_h = h;
  96
  97         for (i = 0; i < partial_h; i++, source += sw, dest += w) {
  98             memcpy(dest, source, partial_w * sizeof(RrPixel32));
  99         }
 100     } else
 101         RrRender(a, w, h);
 102
 103     {
 104         gint l, t, r, b;
 105         RrMargins(a, &l, &t, &r, &b);
 106         RECT_SET(tarea, l, t, w - l - r, h - t - b);
 107     }
 108
 109     for (i = 0; i < a->textures; i++) {
 110         switch (a->texture[i].type) {
 111         case RR_TEXTURE_NONE:
 112             break;
 113         case RR_TEXTURE_TEXT:
 114             if (!transferred) {
 115                 transferred = 1;
 116                 if ((a->surface.grad != RR_SURFACE_SOLID) || (a->surface.interlaced))
 117                     pixel_data_to_pixmap(a, 0, 0, w, h);
 118             }
 119             if (a->xftdraw == NULL) {
 120                 a->xftdraw = XftDrawCreate(RrDisplay(a->inst), a->pixmap,
 121                                            RrVisual(a->inst),
 122                                            RrColormap(a->inst));
 123             }
 124             RrFontDraw(a->xftdraw, &a->texture[i].data.text, &tarea);
 125             break;
 126         case RR_TEXTURE_LINE_ART:
 127             if (!transferred) {
 128                 transferred = 1;
 129                 if ((a->surface.grad != RR_SURFACE_SOLID) || (a->surface.interlaced))
 130                     pixel_data_to_pixmap(a, 0, 0, w, h);
 131             }
 132             XDrawLine(RrDisplay(a->inst), a->pixmap,
 133                       RrColorGC(a->texture[i].data.lineart.color),
 134                       a->texture[i].data.lineart.x1,
 135                       a->texture[i].data.lineart.y1,
 136                       a->texture[i].data.lineart.x2,
 137                       a->texture[i].data.lineart.y2);
 138             break;
 139         case RR_TEXTURE_MASK:
 140             if (!transferred) {
 141                 transferred = 1;
 142                 if ((a->surface.grad != RR_SURFACE_SOLID) || (a->surface.interlaced))
 143                     pixel_data_to_pixmap(a, 0, 0, w, h);
 144             }
 145             RrPixmapMaskDraw(a->pixmap, &a->texture[i].data.mask, &tarea);
 146             break;
 147         case RR_TEXTURE_RGBA:
 148             g_assert(!transferred);
 149             RrImageDraw(a->surface.pixel_data,
 150                         &a->texture[i].data.rgba,
 151                         a->w, a->h,
 152                         &tarea);
 153         break;
 154         }
 155     }
 156
 157     if (!transferred) {
 158         transferred = 1;
 159         if ((a->surface.grad != RR_SURFACE_SOLID) || (a->surface.interlaced))
 160             pixel_data_to_pixmap(a, 0, 0, w, h);
 161     }
 162
 163     XSetWindowBackgroundPixmap(RrDisplay(a->inst), win, a->pixmap);
 164     XClearWindow(RrDisplay(a->inst), win);
 165     if (oldp) XFreePixmap(RrDisplay(a->inst), oldp);
 166 }
 167
 168 RrAppearance *RrAppearanceNew(const RrInstance *inst, gint numtex)
 169 {
 170   RrAppearance *out;
 171
 172   out = g_new0(RrAppearance, 1);
 173   out->inst = inst;
 174   out->textures = numtex;
 175   if (numtex) out->texture = g_new0(RrTexture, numtex);
 176
 177   return out;
 178 }
 179
 180 RrAppearance *RrAppearanceCopy(RrAppearance *orig)
 181 {
 182     RrSurface *spo, *spc;
 183     RrAppearance *copy = g_new(RrAppearance, 1);
 184     gint i;
 185
 186     copy->inst = orig->inst;
 187
 188     spo = &(orig->surface);
 189     spc = &(copy->surface);
 190     spc->grad = spo->grad;
 191     spc->relief = spo->relief;
 192     spc->bevel = spo->bevel;
 193     if (spo->primary != NULL)
 194         spc->primary = RrColorNew(copy->inst,
 195                                   spo->primary->r,
 196                                   spo->primary->g,
 197                                   spo->primary->b);
 198     else spc->primary = NULL;
 199
 200     if (spo->secondary != NULL)
 201         spc->secondary = RrColorNew(copy->inst,
 202                                     spo->secondary->r,
 203                                     spo->secondary->g,
 204                                     spo->secondary->b);
 205     else spc->secondary = NULL;
 206
 207     if (spo->border_color != NULL)
 208         spc->border_color = RrColorNew(copy->inst,
 209                                        spo->border_color->r,
 210                                        spo->border_color->g,
 211                                        spo->border_color->b);
 212     else spc->border_color = NULL;
 213
 214     if (spo->interlace_color != NULL)
 215         spc->interlace_color = RrColorNew(copy->inst,
 216                                        spo->interlace_color->r,
 217                                        spo->interlace_color->g,
 218                                        spo->interlace_color->b);
 219     else spc->interlace_color = NULL;
 220
 221     if (spo->bevel_dark != NULL)
 222         spc->bevel_dark = RrColorNew(copy->inst,
 223                                      spo->bevel_dark->r,
 224                                      spo->bevel_dark->g,
 225                                      spo->bevel_dark->b);
 226     else spc->bevel_dark = NULL;
 227
 228     if (spo->bevel_light != NULL)
 229         spc->bevel_light = RrColorNew(copy->inst,
 230                                       spo->bevel_light->r,
 231                                       spo->bevel_light->g,
 232                                       spo->bevel_light->b);
 233     else spc->bevel_light = NULL;
 234
 235     spc->interlaced = spo->interlaced;
 236     spc->border = spo->border;
 237     spc->parent = NULL;
 238     spc->parentx = spc->parenty = 0;
 239     spc->pixel_data = NULL;
 240
 241     copy->textures = orig->textures;
 242     copy->texture = g_memdup(orig->texture,
 243                              orig->textures * sizeof(RrTexture));
 244     for (i = 0; i < copy->textures; ++i)
 245         if (copy->texture[i].type == RR_TEXTURE_RGBA) {
 246             copy->texture[i].data.rgba.cache = NULL;
 247         }
 248     copy->pixmap = None;
 249     copy->xftdraw = NULL;
 250     copy->w = copy->h = 0;
 251     return copy;
 252 }
 253
 254 void RrAppearanceFree(RrAppearance *a)
 255 {
 256     gint i;
 257
 258     if (a) {
 259         RrSurface *p;
 260         if (a->pixmap != None) XFreePixmap(RrDisplay(a->inst), a->pixmap);
 261         if (a->xftdraw != NULL) XftDrawDestroy(a->xftdraw);
 262         for (i = 0; i < a->textures; ++i)
 263             if (a->texture[i].type == RR_TEXTURE_RGBA) {
 264                 g_free(a->texture[i].data.rgba.cache);
 265                 a->texture[i].data.rgba.cache = NULL;
 266             }
 267         if (a->textures)
 268             g_free(a->texture);
 269         p = &a->surface;
 270         RrColorFree(p->primary);
 271         RrColorFree(p->secondary);
 272         RrColorFree(p->border_color);
 273         RrColorFree(p->interlace_color);
 274         RrColorFree(p->bevel_dark);
 275         RrColorFree(p->bevel_light);
 276         g_free(p->pixel_data);
 277         p->pixel_data = NULL;
 278         g_free(a);
 279     }
 280 }
 281
 282
 283 static void pixel_data_to_pixmap(RrAppearance *l,
 284                                  gint x, gint y, gint w, gint h)
 285 {
 286     RrPixel32 *in, *scratch;
 287     Pixmap out;
 288     XImage *im = NULL;
 289     im = XCreateImage(RrDisplay(l->inst), RrVisual(l->inst), RrDepth(l->inst),
 290                       ZPixmap, 0, NULL, w, h, 32, 0);
 291     g_assert(im != NULL);
 292
 293     in = l->surface.pixel_data;
 294     out = l->pixmap;
 295
 296 /* this malloc is a complete waste of time on normal 32bpp
 297    as reduce_depth just sets im->data = data and returns
 298 */
 299     scratch = g_new(RrPixel32, im->width * im->height);
 300     im->data = (gchar*) scratch;
 301     RrReduceDepth(l->inst, in, im);
 302     XPutImage(RrDisplay(l->inst), out,
 303               DefaultGC(RrDisplay(l->inst), RrScreen(l->inst)),
 304               im, 0, 0, x, y, w, h);
 305     im->data = NULL;
 306     XDestroyImage(im);
 307     g_free(scratch);
 308 }
 309
 310 void RrMargins (RrAppearance *a, gint *l, gint *t, gint *r, gint *b)
 311 {
 312     *l = *t = *r = *b = 0;
 313
 314     if (a->surface.grad != RR_SURFACE_PARENTREL) {
 315         if (a->surface.relief != RR_RELIEF_FLAT) {
 316             switch (a->surface.bevel) {
 317             case RR_BEVEL_1:
 318                 *l = *t = *r = *b = 1;
 319                 break;
 320             case RR_BEVEL_2:
 321                 *l = *t = *r = *b = 2;
 322                 break;
 323             }
 324         } else if (a->surface.border) {
 325             *l = *t = *r = *b = 1;
 326         }
 327     }
 328 }
 329
 330 void RrMinsize(RrAppearance *a, gint *w, gint *h)
 331 {
 332     gint i;
 333     RrSize *m;
 334     gint l, t, r, b;
 335     *w = *h = 0;
 336
 337     for (i = 0; i < a->textures; ++i) {
 338         switch (a->texture[i].type) {
 339         case RR_TEXTURE_NONE:
 340             break;
 341         case RR_TEXTURE_MASK:
 342             *w = MAX(*w, a->texture[i].data.mask.mask->width);
 343             *h = MAX(*h, a->texture[i].data.mask.mask->height);
 344             break;
 345         case RR_TEXTURE_TEXT:
 346             m = RrFontMeasureString(a->texture[i].data.text.font,
 347                                     a->texture[i].data.text.string);
 348             *w = MAX(*w, m->width + 4);
 349             m->height = RrFontHeight(a->texture[i].data.text.font);
 350             *h += MAX(*h, m->height);
 351             g_free(m);
 352             break;
 353         case RR_TEXTURE_RGBA:
 354             *w += MAX(*w, a->texture[i].data.rgba.width);
 355             *h += MAX(*h, a->texture[i].data.rgba.height);
 356             break;
 357         case RR_TEXTURE_LINE_ART:
 358             *w += MAX(*w, MAX(a->texture[i].data.lineart.x1,
 359                               a->texture[i].data.lineart.x2));
 360             *h += MAX(*h, MAX(a->texture[i].data.lineart.y1,
 361                               a->texture[i].data.lineart.y2));
 362             break;
 363         }
 364     }
 365
 366     RrMargins(a, &l, &t, &r, &b);
 367
 368     *w += l + r;
 369     *h += t + b;
 370
 371     if (*w < 1) *w = 1;
 372     if (*h < 1) *h = 1;
 373 }
 374
 375 static void reverse_bits(gchar *c, gint n)
 376 {
 377     gint i;
 378     for (i = 0; i < n; i++, c++)
 379         *c = (((*c * 0x0802UL & 0x22110UL) |
 380                (*c * 0x8020UL & 0x88440UL)) * 0x10101UL) >> 16;
 381 }
 382
 383 gboolean RrPixmapToRGBA(const RrInstance *inst,
 384                         Pixmap pmap, Pixmap mask,
 385                         gint *w, gint *h, RrPixel32 **data)
 386 {
 387     Window xr;
 388     gint xx, xy;
 389     guint pw, ph, mw, mh, xb, xd, i, x, y, di;
 390     XImage *xi, *xm = NULL;
 391
 392     if (!XGetGeometry(RrDisplay(inst), pmap,
 393                       &xr, &xx, &xy, &pw, &ph, &xb, &xd))
 394         return FALSE;
 395
 396     if (mask) {
 397         if (!XGetGeometry(RrDisplay(inst), mask,
 398                           &xr, &xx, &xy, &mw, &mh, &xb, &xd))
 399             return FALSE;
 400         if (pw != mw || ph != mh || xd != 1)
 401             return FALSE;
 402     }
 403
 404     xi = XGetImage(RrDisplay(inst), pmap,
 405                    0, 0, pw, ph, 0xffffffff, ZPixmap);
 406     if (!xi)
 407         return FALSE;
 408
 409     if (mask) {
 410         xm = XGetImage(RrDisplay(inst), mask,
 411                        0, 0, mw, mh, 0xffffffff, ZPixmap);
 412         if (!xm) {
 413             XDestroyImage(xi);
 414             return FALSE;
 415         }
 416         if ((xm->bits_per_pixel == 1) && (xm->bitmap_bit_order != LSBFirst))
 417             reverse_bits(xm->data, xm->bytes_per_line * xm->height);
 418     }
 419
 420     if ((xi->bits_per_pixel == 1) && (xi->bitmap_bit_order != LSBFirst))
 421         reverse_bits(xi->data, xi->bytes_per_line * xi->height);
 422
 423     *data = g_new(RrPixel32, pw * ph);
 424     RrIncreaseDepth(inst, *data, xi);
 425
 426     if (mask) {
 427         /* apply transparency from the mask */
 428         di = 0;
 429         for (i = 0, y = 0; y < ph; ++y) {
 430             for (x = 0; x < pw; ++x, ++i) {
 431                 if (!((((unsigned)xm->data[di + x / 8]) >> (x % 8)) & 0x1))
 432                     (*data)[i] &= ~(0xff << RrDefaultAlphaOffset);
 433             }
 434             di += xm->bytes_per_line;
 435         }
 436     }
 437
 438     *w = pw;
 439     *h = ph;
 440
 441     XDestroyImage(xi);
 442     if (mask)
 443         XDestroyImage(xm);
 444
 445     return TRUE;
 446 }