src/pixbuf_util.c

   1 /*
   2  * Geeqie
   3  * (C) 2004 John Ellis
   4  * Copyright (C) 2008 The Geeqie Team
   5  *
   6  * Author: John Ellis
   7  *
   8  * This software is released under the GNU General Public License (GNU GPL).
   9  * Please read the included file COPYING for more information.
  10  * This software comes with no warranty of any kind, use at your own risk!
  11  */
  12
  13
  14 #include "main.h"
  15 #include "pixbuf_util.h"
  16 #include "exif.h"
  17
  18 #include "icons/icons_inline.h"
  19
  20 #include <math.h>
  21
  22
  23 /*
  24  *-----------------------------------------------------------------------------
  25  * png save
  26  *-----------------------------------------------------------------------------
  27  */
  28
  29 gboolean pixbuf_to_file_as_png(GdkPixbuf *pixbuf, const char *filename)
  30 {
  31         GError *error = NULL;
  32         gint ret;
  33
  34         if (!pixbuf || !filename) return FALSE;
  35
  36         ret = gdk_pixbuf_save(pixbuf, filename, "png", &error,
  37                               "tEXt::Software", GQ_APPNAME " " VERSION, NULL);
  38
  39         if (error)
  40                 {
  41                 log_printf("Error saving png file: %s\n", error->message);
  42                 g_error_free(error);
  43                 }
  44
  45         return ret;
  46 }
  47
  48 /*
  49  *-----------------------------------------------------------------------------
  50  * jpeg save
  51  *-----------------------------------------------------------------------------
  52  */
  53
  54 gboolean pixbuf_to_file_as_jpg(GdkPixbuf *pixbuf, const gchar *filename, gint quality)
  55 {
  56         GError *error = NULL;
  57         gchar *qbuf;
  58         gboolean ret;
  59
  60         if (!pixbuf || !filename) return FALSE;
  61
  62         if (quality == -1) quality = 75;
  63         if (quality < 1 || quality > 100)
  64                 {
  65                 log_printf("Jpeg not saved, invalid quality %d\n", quality);
  66                 return FALSE;
  67                 }
  68
  69         qbuf = g_strdup_printf("%d", quality);
  70         ret = gdk_pixbuf_save(pixbuf, filename, "jpeg", &error, "quality", qbuf, NULL);
  71         g_free(qbuf);
  72
  73         if (error)
  74                 {
  75                 log_printf("Error saving jpeg to %s\n%s\n", filename, error->message);
  76                 g_error_free(error);
  77                 }
  78
  79         return ret;
  80 }
  81
  82 /*
  83  *-----------------------------------------------------------------------------
  84  * pixbuf from inline
  85  *-----------------------------------------------------------------------------
  86  */
  87
  88 typedef struct _PixbufInline PixbufInline;
  89 struct _PixbufInline
  90 {
  91         const gchar *key;
  92         const guint8 *data;
  93 };
  94
  95 static PixbufInline inline_pixbuf_data[] = {
  96         { PIXBUF_INLINE_FOLDER_CLOSED,  folder_closed },
  97         { PIXBUF_INLINE_FOLDER_LOCKED,  folder_locked },
  98         { PIXBUF_INLINE_FOLDER_OPEN,    folder_open },
  99         { PIXBUF_INLINE_FOLDER_UP,      folder_up },
 100         { PIXBUF_INLINE_SCROLLER,       icon_scroller },
 101         { PIXBUF_INLINE_BROKEN,         icon_broken },
 102         { PIXBUF_INLINE_ICON,           gqview_icon },
 103         { PIXBUF_INLINE_LOGO,           geeqie_logo },
 104         { PIXBUF_INLINE_ICON_FLOAT,     icon_float },
 105         { PIXBUF_INLINE_ICON_THUMB,     icon_thumb },
 106         { PIXBUF_INLINE_ICON_BOOK,      icon_book },
 107         { PIXBUF_INLINE_ICON_CONFIG,    icon_config },
 108         { PIXBUF_INLINE_ICON_TOOLS,     icon_tools },
 109         { PIXBUF_INLINE_ICON_VIEW,      icon_view },
 110         { NULL, NULL }
 111 };
 112
 113 GdkPixbuf *pixbuf_inline(const gchar *key)
 114 {
 115         gint i;
 116
 117         if (!key) return NULL;
 118
 119         i = 0;
 120         while (inline_pixbuf_data[i].key)
 121                 {
 122                 if (strcmp(inline_pixbuf_data[i].key, key) == 0)
 123                         {
 124                         return gdk_pixbuf_new_from_inline(-1, inline_pixbuf_data[i].data, FALSE, NULL);
 125                         }
 126                 i++;
 127                 }
 128
 129         log_printf("warning: inline pixbuf key \"%s\" not found.\n", key);
 130
 131         return NULL;
 132 }
 133
 134 /*
 135  *-----------------------------------------------------------------------------
 136  * misc utils
 137  *-----------------------------------------------------------------------------
 138  */
 139
 140 gint util_clip_region(gint x, gint y, gint w, gint h,
 141                       gint clip_x, gint clip_y, gint clip_w, gint clip_h,
 142                       gint *rx, gint *ry, gint *rw, gint *rh)
 143 {
 144         if (clip_x + clip_w <= x ||
 145             clip_x >= x + w ||
 146             clip_y + clip_h <= y ||
 147             clip_y >= y + h)
 148                 {
 149                 return FALSE;
 150                 }
 151
 152         *rx = MAX(x, clip_x);
 153         *rw = MIN((x + w), (clip_x + clip_w)) - *rx;
 154
 155         *ry = MAX(y, clip_y);
 156         *rh = MIN((y + h), (clip_y + clip_h)) - *ry;
 157
 158         return TRUE;
 159 }
 160
 161 /*
 162  *-----------------------------------------------------------------------------
 163  * pixbuf rotation
 164  *-----------------------------------------------------------------------------
 165  */
 166
 167 static void pixbuf_copy_block_rotate(guchar *src, gint src_row_stride, gint x, gint y,
 168                                      guchar *dest, gint dest_row_stride, gint w, gint h,
 169                                      gint bytes_per_pixel, gint counter_clockwise)
 170 {
 171         gint i, j;
 172         guchar *sp;
 173         guchar *dp;
 174
 175         for (i = 0; i < h; i++)
 176                 {
 177                 sp = src + ((i + y) * src_row_stride) + (x * bytes_per_pixel);
 178                 for (j = 0; j < w; j++)
 179                         {
 180                         if (counter_clockwise)
 181                                 {
 182                                 dp = dest + ((w - j - 1) * dest_row_stride) + (i * bytes_per_pixel);
 183                                 }
 184                         else
 185                                 {
 186                                 dp = dest + (j * dest_row_stride) + ((h - i - 1) * bytes_per_pixel);
 187                                 }
 188                         *(dp++) = *(sp++);      /* r */
 189                         *(dp++) = *(sp++);      /* g */
 190                         *(dp++) = *(sp++);      /* b */
 191                         if (bytes_per_pixel == 4) *(dp) = *(sp++);      /* a */
 192                         }
 193                 }
 194
 195 }
 196
 197 static void pixbuf_copy_block(guchar *src, gint src_row_stride, gint w, gint h,
 198                               guchar *dest, gint dest_row_stride, gint x, gint y, gint bytes_per_pixel)
 199 {
 200         gint i;
 201         guchar *sp;
 202         guchar *dp;
 203
 204         for (i = 0; i < h; i++)
 205                 {
 206                 sp = src + (i * src_row_stride);
 207                 dp = dest + ((y + i) * dest_row_stride) + (x * bytes_per_pixel);
 208                 memcpy(dp, sp, w * bytes_per_pixel);
 209                 }
 210 }
 211
 212 #define ROTATE_BUFFER_WIDTH 48
 213 #define ROTATE_BUFFER_HEIGHT 48
 214
 215 /*
 216  * Returns a copy of pixbuf src rotated 90 degrees clockwise or 90 counterclockwise
 217  *
 218  */
 219 GdkPixbuf *pixbuf_copy_rotate_90(GdkPixbuf *src, gint counter_clockwise)
 220 {
 221         GdkPixbuf *dest;
 222         gint has_alpha;
 223         gint sw, sh, srs;
 224         gint dw, dh, drs;
 225         guchar *s_pix;
 226         guchar *d_pix;
 227 #if 0
 228         guchar *sp;
 229         guchar *dp;
 230 #endif
 231         gint i, j;
 232         gint a;
 233         GdkPixbuf *buffer;
 234         guchar *b_pix;
 235         gint brs;
 236         gint w, h;
 237
 238         if (!src) return NULL;
 239
 240         sw = gdk_pixbuf_get_width(src);
 241         sh = gdk_pixbuf_get_height(src);
 242         has_alpha = gdk_pixbuf_get_has_alpha(src);
 243         srs = gdk_pixbuf_get_rowstride(src);
 244         s_pix = gdk_pixbuf_get_pixels(src);
 245
 246         dw = sh;
 247         dh = sw;
 248         dest = gdk_pixbuf_new(GDK_COLORSPACE_RGB, has_alpha, 8, dw, dh);
 249         drs = gdk_pixbuf_get_rowstride(dest);
 250         d_pix = gdk_pixbuf_get_pixels(dest);
 251
 252         a = (has_alpha ? 4 : 3);
 253
 254         buffer = gdk_pixbuf_new(GDK_COLORSPACE_RGB, has_alpha, 8,
 255                                 ROTATE_BUFFER_WIDTH, ROTATE_BUFFER_HEIGHT);
 256         b_pix = gdk_pixbuf_get_pixels(buffer);
 257         brs = gdk_pixbuf_get_rowstride(buffer);
 258
 259         for (i = 0; i < sh; i+= ROTATE_BUFFER_WIDTH)
 260                 {
 261                 w = MIN(ROTATE_BUFFER_WIDTH, (sh - i));
 262                 for (j = 0; j < sw; j += ROTATE_BUFFER_HEIGHT)
 263                         {
 264                         gint x, y;
 265
 266                         h = MIN(ROTATE_BUFFER_HEIGHT, (sw - j));
 267                         pixbuf_copy_block_rotate(s_pix, srs, j, i,
 268                                                  b_pix, brs, h, w,
 269                                                  a, counter_clockwise);
 270
 271                         if (counter_clockwise)
 272                                 {
 273                                 x = i;
 274                                 y = sw - h - j;
 275                                 }
 276                         else
 277                                 {
 278                                 x = sh - w - i;
 279                                 y = j;
 280                                 }
 281                         pixbuf_copy_block(b_pix, brs, w, h,
 282                                           d_pix, drs, x, y, a);
 283                         }
 284                 }
 285
 286         gdk_pixbuf_unref(buffer);
 287
 288 #if 0
 289         /* this is the simple version of rotation (roughly 2-4x slower) */
 290
 291         for (i = 0; i < sh; i++)
 292                 {
 293                 sp = s_pix + (i * srs);
 294                 for (j = 0; j < sw; j++)
 295                         {
 296                         if (counter_clockwise)
 297                                 {
 298                                 dp = d_pix + ((dh - j - 1) * drs) + (i * a);
 299                                 }
 300                         else
 301                                 {
 302                                 dp = d_pix + (j * drs) + ((dw - i - 1) * a);
 303                                 }
 304
 305                         *(dp++) = *(sp++);      /* r */
 306                         *(dp++) = *(sp++);      /* g */
 307                         *(dp++) = *(sp++);      /* b */
 308                         if (has_alpha) *(dp) = *(sp++); /* a */
 309                         }
 310                 }
 311 #endif
 312
 313         return dest;
 314 }
 315
 316 /*
 317  * Returns a copy of pixbuf mirrored and or flipped.
 318  * TO do a 180 degree rotations set both mirror and flipped TRUE
 319  * if mirror and flip are FALSE, result is a simple copy.
 320  */
 321 GdkPixbuf *pixbuf_copy_mirror(GdkPixbuf *src, gint mirror, gint flip)
 322 {
 323         GdkPixbuf *dest;
 324         gint has_alpha;
 325         gint w, h, srs;
 326         gint drs;
 327         guchar *s_pix;
 328         guchar *d_pix;
 329         guchar *sp;
 330         guchar *dp;
 331         gint i, j;
 332         gint a;
 333
 334         if (!src) return NULL;
 335
 336         w = gdk_pixbuf_get_width(src);
 337         h = gdk_pixbuf_get_height(src);
 338         has_alpha = gdk_pixbuf_get_has_alpha(src);
 339         srs = gdk_pixbuf_get_rowstride(src);
 340         s_pix = gdk_pixbuf_get_pixels(src);
 341
 342         dest = gdk_pixbuf_new(GDK_COLORSPACE_RGB, has_alpha, 8, w, h);
 343         drs = gdk_pixbuf_get_rowstride(dest);
 344         d_pix = gdk_pixbuf_get_pixels(dest);
 345
 346         a = has_alpha ? 4 : 3;
 347
 348         for (i = 0; i < h; i++)
 349                 {
 350                 sp = s_pix + (i * srs);
 351                 if (flip)
 352                         {
 353                         dp = d_pix + ((h - i - 1) * drs);
 354                         }
 355                 else
 356                         {
 357                         dp = d_pix + (i * drs);
 358                         }
 359                 if (mirror)
 360                         {
 361                         dp += (w - 1) * a;
 362                         for (j = 0; j < w; j++)
 363                                 {
 364                                 *(dp++) = *(sp++);      /* r */
 365                                 *(dp++) = *(sp++);      /* g */
 366                                 *(dp++) = *(sp++);      /* b */
 367                                 if (has_alpha) *(dp) = *(sp++); /* a */
 368                                 dp -= (a + 3);
 369                                 }
 370                         }
 371                 else
 372                         {
 373                         for (j = 0; j < w; j++)
 374                                 {
 375                                 *(dp++) = *(sp++);      /* r */
 376                                 *(dp++) = *(sp++);      /* g */
 377                                 *(dp++) = *(sp++);      /* b */
 378                                 if (has_alpha) *(dp++) = *(sp++);       /* a */
 379                                 }
 380                         }
 381                 }
 382
 383         return dest;
 384 }
 385
 386 GdkPixbuf* pixbuf_apply_orientation(GdkPixbuf *pixbuf, gint orientation)
 387 {
 388         GdkPixbuf *dest;
 389         GdkPixbuf *tmp = NULL;
 390
 391         switch (orientation)
 392                 {
 393                 case EXIF_ORIENTATION_TOP_LEFT:
 394                         dest = gdk_pixbuf_copy(pixbuf);
 395                         break;
 396                 case EXIF_ORIENTATION_TOP_RIGHT:
 397                         /* mirrored */
 398                         dest = pixbuf_copy_mirror(pixbuf, TRUE, FALSE);
 399                         break;
 400                 case EXIF_ORIENTATION_BOTTOM_RIGHT:
 401                         /* upside down */
 402                         dest = pixbuf_copy_mirror(pixbuf, TRUE, TRUE);
 403                         break;
 404                 case EXIF_ORIENTATION_BOTTOM_LEFT:
 405                         /* flipped */
 406                         dest = pixbuf_copy_mirror(pixbuf, FALSE, TRUE);
 407                         break;
 408                 case EXIF_ORIENTATION_LEFT_TOP:
 409                         tmp = pixbuf_copy_mirror(pixbuf, FALSE, TRUE);
 410                         dest = pixbuf_copy_rotate_90(tmp, FALSE);
 411                         break;
 412                 case EXIF_ORIENTATION_RIGHT_TOP:
 413                         /* rotated -90 (270) */
 414                         dest = pixbuf_copy_rotate_90(pixbuf, FALSE);
 415                         break;
 416                 case EXIF_ORIENTATION_RIGHT_BOTTOM:
 417                         tmp = pixbuf_copy_mirror(pixbuf, FALSE, TRUE);
 418                         dest = pixbuf_copy_rotate_90(tmp, TRUE);
 419                         break;
 420                 case EXIF_ORIENTATION_LEFT_BOTTOM:
 421                         /* rotated 90 */
 422                         dest = pixbuf_copy_rotate_90(pixbuf, TRUE);
 423                         break;
 424                 default:
 425                         dest = gdk_pixbuf_copy(pixbuf);
 426                         break;
 427                 }
 428         if (tmp) gdk_pixbuf_unref(tmp);
 429         return dest;
 430
 431 }
 432
 433
 434 /*
 435  *-----------------------------------------------------------------------------
 436  * pixbuf drawing (rectangles)
 437  *-----------------------------------------------------------------------------
 438  */
 439
 440 /*
 441  * Fills region of pixbuf at x,y over w,h
 442  * with colors red (r), green (g), blue (b)
 443  * applying alpha (a), use a=255 for solid.
 444  */
 445 void pixbuf_draw_rect_fill(GdkPixbuf *pb,
 446                            gint x, gint y, gint w, gint h,
 447                            gint r, gint g, gint b, gint a)
 448 {
 449         gint p_alpha;
 450         gint pw, ph, prs;
 451         guchar *p_pix;
 452         guchar *pp;
 453         gint i, j;
 454
 455         if (!pb) return;
 456
 457         pw = gdk_pixbuf_get_width(pb);
 458         ph = gdk_pixbuf_get_height(pb);
 459
 460         if (x < 0 || x + w > pw) return;
 461         if (y < 0 || y + h > ph) return;
 462
 463         p_alpha = gdk_pixbuf_get_has_alpha(pb);
 464         prs = gdk_pixbuf_get_rowstride(pb);
 465         p_pix = gdk_pixbuf_get_pixels(pb);
 466
 467         for (i = 0; i < h; i++)
 468                 {
 469                 pp = p_pix + (y + i) * prs + (x * (p_alpha ? 4 : 3));
 470                 for (j = 0; j < w; j++)
 471                         {
 472                         *pp = (r * a + *pp * (256-a)) >> 8;
 473                         pp++;
 474                         *pp = (g * a + *pp * (256-a)) >> 8;
 475                         pp++;
 476                         *pp = (b * a + *pp * (256-a)) >> 8;
 477                         pp++;
 478                         if (p_alpha) pp++;
 479                         }
 480                 }
 481 }
 482
 483 void pixbuf_draw_rect(GdkPixbuf *pb,
 484                       gint x, gint y, gint w, gint h,
 485                       gint r, gint g, gint b, gint a,
 486                       gint left, gint right, gint top, gint bottom)
 487 {
 488         pixbuf_draw_rect_fill(pb, x + left, y, w - left - right, top,
 489                               r, g, b ,a);
 490         pixbuf_draw_rect_fill(pb, x + w - right, y, right, h,
 491                               r, g, b ,a);
 492         pixbuf_draw_rect_fill(pb, x + left, y + h - bottom, w - left - right, bottom,
 493                               r, g, b ,a);
 494         pixbuf_draw_rect_fill(pb, x, y, left, h,
 495                               r, g, b ,a);
 496 }
 497
 498 void pixbuf_set_rect_fill(GdkPixbuf *pb,
 499                           gint x, gint y, gint w, gint h,
 500                           gint r, gint g, gint b, gint a)
 501 {
 502         gint p_alpha;
 503         gint pw, ph, prs;
 504         guchar *p_pix;
 505         guchar *pp;
 506         gint i, j;
 507
 508         if (!pb) return;
 509
 510         pw = gdk_pixbuf_get_width(pb);
 511         ph = gdk_pixbuf_get_height(pb);
 512
 513         if (x < 0 || x + w > pw) return;
 514         if (y < 0 || y + h > ph) return;
 515
 516         p_alpha = gdk_pixbuf_get_has_alpha(pb);
 517         prs = gdk_pixbuf_get_rowstride(pb);
 518         p_pix = gdk_pixbuf_get_pixels(pb);
 519
 520         for (i = 0; i < h; i++)
 521                 {
 522                 pp = p_pix + (y + i) * prs + (x * (p_alpha ? 4 : 3));
 523                 for (j = 0; j < w; j++)
 524                         {
 525                         *pp = r; pp++;
 526                         *pp = g; pp++;
 527                         *pp = b; pp++;
 528                         if (p_alpha) { *pp = a; pp++; }
 529                         }
 530                 }
 531 }
 532
 533 void pixbuf_set_rect(GdkPixbuf *pb,
 534                      gint x, gint y, gint w, gint h,
 535                      gint r, gint g, gint b, gint a,
 536                      gint left, gint right, gint top, gint bottom)
 537 {
 538         pixbuf_set_rect_fill(pb, x + left, y, w - left - right, top,
 539                              r, g, b ,a);
 540         pixbuf_set_rect_fill(pb, x + w - right, y, right, h,
 541                              r, g, b ,a);
 542         pixbuf_set_rect_fill(pb, x + left, y + h - bottom, w - left - right, bottom,
 543                              r, g, b ,a);
 544         pixbuf_set_rect_fill(pb, x, y, left, h,
 545                              r, g, b ,a);
 546 }
 547
 548 void pixbuf_pixel_set(GdkPixbuf *pb, gint x, gint y, gint r, gint g, gint b, gint a)
 549 {
 550         guchar *buf;
 551         gint has_alpha;
 552         gint rowstride;
 553         guchar *p;
 554
 555         if (x < 0 || x >= gdk_pixbuf_get_width(pb) ||
 556             y < 0 || y >= gdk_pixbuf_get_height(pb)) return;
 557
 558         buf = gdk_pixbuf_get_pixels(pb);
 559         has_alpha = gdk_pixbuf_get_has_alpha(pb);
 560         rowstride = gdk_pixbuf_get_rowstride(pb);
 561
 562         p = buf + (y * rowstride) + (x * (has_alpha ? 4 : 3));
 563         *p = r; p++;
 564         *p = g; p++;
 565         *p = b; p++;
 566         if (has_alpha) *p = a;
 567 }
 568
 569
 570 /*
 571  *-----------------------------------------------------------------------------
 572  * pixbuf text rendering
 573  *-----------------------------------------------------------------------------
 574  */
 575
 576 static void pixbuf_copy_font(GdkPixbuf *src, gint sx, gint sy,
 577                              GdkPixbuf *dest, gint dx, gint dy,
 578                              gint w, gint h,
 579                              guint8 r, guint8 g, guint8 b, guint8 a)
 580 {
 581         gint sw, sh, srs;
 582         gint s_alpha;
 583         gint s_step;
 584         guchar *s_pix;
 585         gint dw, dh, drs;
 586         gint d_alpha;
 587         gint d_step;
 588         guchar *d_pix;
 589
 590         guchar *sp;
 591         guchar *dp;
 592         gint i, j;
 593
 594         if (!src || !dest) return;
 595
 596         sw = gdk_pixbuf_get_width(src);
 597         sh = gdk_pixbuf_get_height(src);
 598
 599         if (sx < 0 || sx + w > sw) return;
 600         if (sy < 0 || sy + h > sh) return;
 601
 602         dw = gdk_pixbuf_get_width(dest);
 603         dh = gdk_pixbuf_get_height(dest);
 604
 605         if (dx < 0 || dx + w > dw) return;
 606         if (dy < 0 || dy + h > dh) return;
 607
 608         s_alpha = gdk_pixbuf_get_has_alpha(src);
 609         d_alpha = gdk_pixbuf_get_has_alpha(dest);
 610         srs = gdk_pixbuf_get_rowstride(src);
 611         drs = gdk_pixbuf_get_rowstride(dest);
 612         s_pix = gdk_pixbuf_get_pixels(src);
 613         d_pix = gdk_pixbuf_get_pixels(dest);
 614
 615         s_step = (s_alpha) ? 4 : 3;
 616         d_step = (d_alpha) ? 4 : 3;
 617
 618         for (i = 0; i < h; i++)
 619                 {
 620                 sp = s_pix + (sy + i) * srs + sx * s_step;
 621                 dp = d_pix + (dy + i) * drs + dx * d_step;
 622                 for (j = 0; j < w; j++)
 623                         {
 624                         if (*sp)
 625                                 {
 626                                 guint8 asub;
 627
 628                                 asub = a * sp[0] / 255;
 629                                 *dp = (r * asub + *dp * (256-asub)) >> 8;
 630                                 dp++;
 631                                 asub = a * sp[1] / 255;
 632                                 *dp = (g * asub + *dp * (256-asub)) >> 8;
 633                                 dp++;
 634                                 asub = a * sp[2] / 255;
 635                                 *dp = (b * asub + *dp * (256-asub)) >> 8;
 636                                 dp++;
 637
 638                                 if (d_alpha)
 639                                         {
 640                                         *dp = MAX(*dp, a * ((sp[0] + sp[1] + sp[2]) / 3) / 255);
 641                                         dp++;
 642                                         }
 643                                 }
 644                         else
 645                                 {
 646                                 dp += d_step;
 647                                 }
 648
 649                         sp += s_step;
 650                         }
 651                 }
 652 }
 653
 654 void pixbuf_draw_layout(GdkPixbuf *pixbuf, PangoLayout *layout, GtkWidget *widget,
 655                         gint x, gint y,
 656                         guint8 r, guint8 g, guint8 b, guint8 a)
 657 {
 658         GdkPixmap *pixmap;
 659         GdkPixbuf *buffer;
 660         gint w, h;
 661         GdkGC *gc;
 662         gint sx, sy;
 663         gint dw, dh;
 664
 665         if (!widget || !widget->window) return;
 666
 667         pango_layout_get_pixel_size(layout, &w, &h);
 668         if (w < 1 || h < 1) return;
 669
 670         pixmap = gdk_pixmap_new(widget->window, w, h, -1);
 671
 672         gc = gdk_gc_new(widget->window);
 673         gdk_gc_copy(gc, widget->style->black_gc);
 674         gdk_draw_rectangle(pixmap, gc, TRUE, 0, 0, w, h);
 675         gdk_gc_copy(gc, widget->style->white_gc);
 676         gdk_draw_layout(pixmap, gc, 0, 0, layout);
 677         g_object_unref(gc);
 678
 679         buffer = gdk_pixbuf_new(GDK_COLORSPACE_RGB, FALSE, 8, w, h);
 680         gdk_pixbuf_get_from_drawable(buffer, pixmap,
 681                                      gdk_drawable_get_colormap(widget->window),
 682                                      0, 0, 0, 0, w, h);
 683         g_object_unref(pixmap);
 684
 685         sx = 0;
 686         sy = 0;
 687         dw = gdk_pixbuf_get_width(pixbuf);
 688         dh = gdk_pixbuf_get_height(pixbuf);
 689
 690         if (x < 0)
 691                 {
 692                 w += x;
 693                 sx = -x;
 694                 x = 0;
 695                 }
 696
 697         if (y < 0)
 698                 {
 699                 h += y;
 700                 sy = -y;
 701                 y = 0;
 702                 }
 703
 704         if (x + w > dw) w = dw - x;
 705         if (y + h > dh) h = dh - y;
 706
 707         pixbuf_copy_font(buffer, sx, sy,
 708                          pixbuf, x, y, w, h,
 709                          r, g, b, a);
 710
 711         g_object_unref(buffer);
 712 }
 713
 714 /*
 715  *-----------------------------------------------------------------------------
 716  * pixbuf drawing (triangle)
 717  *-----------------------------------------------------------------------------
 718  */
 719
 720 void util_clip_triangle(gint x1, gint y1, gint x2, gint y2, gint x3, gint y3,
 721                         gint *rx, gint *ry, gint *rw, gint *rh)
 722 {
 723         gint tx, ty, tw, th;
 724
 725         tx = MIN(x1, x2);
 726         tx = MIN(tx, x3);
 727         ty = MIN(y1, y2);
 728         ty = MIN(ty, y3);
 729         tw = MAX(abs(x1 - x2), abs(x2 - x3));
 730         tw = MAX(tw, abs(x3 - x1));
 731         th = MAX(abs(y1 - y2), abs(y2 - y3));
 732         th = MAX(th, abs(y3 - y1));
 733
 734         *rx = tx;
 735         *ry = ty;
 736         *rw = tw;
 737         *rh = th;
 738 }
 739
 740 void pixbuf_draw_triangle(GdkPixbuf *pb,
 741                           gint clip_x, gint clip_y, gint clip_w, gint clip_h,
 742                           gint x1, gint y1, gint x2, gint y2, gint x3, gint y3,
 743                           guint8 r, guint8 g, guint8 b, guint8 a)
 744 {
 745         gint p_alpha;
 746         gint pw, ph, prs;
 747         gint rx, ry, rw, rh;
 748         gint tx, ty, tw, th;
 749         gint fx1, fy1;
 750         gint fx2, fy2;
 751         gint fw, fh;
 752         guchar *p_pix;
 753         guchar *pp;
 754         gint p_step;
 755         gdouble slope1, slope2;
 756         gint slope1_x, slope1_y;
 757         gint y;
 758         gint t;
 759         gint middle = FALSE;
 760
 761         if (!pb) return;
 762
 763         pw = gdk_pixbuf_get_width(pb);
 764         ph = gdk_pixbuf_get_height(pb);
 765
 766         if (!util_clip_region(0, 0, pw, ph,
 767                               clip_x, clip_y, clip_w, clip_h,
 768                               &rx, &ry, &rw, &rh)) return;
 769
 770         util_clip_triangle(x1, y1, x2, y2, x3, y3,
 771                            &tx, &ty, &tw, &th);
 772
 773         if (!util_clip_region(rx, ry, rw, rh,
 774                               tx, ty, tw, th,
 775                               &fx1, &fy1, &fw, &fh)) return;
 776         fx2 = fx1 + fw;
 777         fy2 = fy1 + fh;
 778
 779         p_alpha = gdk_pixbuf_get_has_alpha(pb);
 780         prs = gdk_pixbuf_get_rowstride(pb);
 781         p_pix = gdk_pixbuf_get_pixels(pb);
 782
 783         p_step = (p_alpha) ? 4 : 3;
 784
 785         if (y1 > y2)
 786                 {
 787                 t = x1; x1 = x2; x2 = t;
 788                 t = y1; y1 = y2; y2 = t;
 789                 }
 790         if (y2 > y3)
 791                 {
 792                 t = x2; x2 = x3; x3 = t;
 793                 t = y2; y2 = y3; y3 = t;
 794                 }
 795         if (y1 > y2)
 796                 {
 797                 t = x1; x1 = x2; x2 = t;
 798                 t = y1; y1 = y2; y2 = t;
 799                 }
 800
 801         slope1 = (gdouble)(y2 - y1);
 802         if (slope1) slope1 = (gdouble)(x2 - x1) / slope1;
 803         slope1_x = x1;
 804         slope1_y = y1;
 805         slope2 = (gdouble)(y3 - y1);
 806         if (slope2) slope2 = (gdouble)(x3 - x1) / slope2;
 807
 808         for (y = fy1; y < fy2; y++)
 809                 {
 810                 gint xa, xb;
 811
 812                 if (!middle && y > y2)
 813                         {
 814                         slope1 = (gdouble)(y3 - y2);
 815                         if (slope1) slope1 = (gdouble)(x3 - x2) / slope1;
 816                         slope1_x = x2;
 817                         slope1_y = y2;
 818
 819                         middle = TRUE;
 820                         }
 821
 822                 xa = slope1_x + ((gdouble)slope1 * (y - slope1_y) + 0.5);
 823                 xb = x1 + ((gdouble)slope2 * (y - y1) + 0.5);
 824
 825                 if (xa > xb)
 826                         {
 827                         t = xa; xa = xb; xb = t;
 828                         }
 829
 830                 xa = CLAMP(xa, fx1, fx2);
 831                 xb = CLAMP(xb, fx1, fx2);
 832
 833                 pp = p_pix + y * prs + xa * p_step;
 834
 835                 while (xa < xb)
 836                         {
 837                         *pp = (r * a + *pp * (256-a)) >> 8;
 838                         pp++;
 839                         *pp = (g * a + *pp * (256-a)) >> 8;
 840                         pp++;
 841                         *pp = (b * a + *pp * (256-a)) >> 8;
 842                         pp++;
 843                         if (p_alpha) pp++;
 844
 845                         xa++;
 846                         }
 847                 }
 848 }
 849
 850 /*
 851  *-----------------------------------------------------------------------------
 852  * pixbuf drawing (line)
 853  *-----------------------------------------------------------------------------
 854  */
 855
 856 static gint util_clip_line(gdouble clip_x, gdouble clip_y, gdouble clip_w, gdouble clip_h,
 857                            gdouble x1, gdouble y1, gdouble x2, gdouble y2,
 858                            gdouble *rx1, gdouble *ry1, gdouble *rx2, gdouble *ry2)
 859 {
 860         gint flip = FALSE;
 861         gdouble d;
 862
 863         if (x1 > x2)
 864                 {
 865                 gdouble t;
 866
 867                 t = x1; x1 = x2; x2 = t;
 868                 t = y1; y1 = y2; y2 = t;
 869                 flip = TRUE;
 870                 }
 871
 872         if (x2 < clip_x || x1 > clip_x + clip_w) return FALSE;
 873
 874         if (y1 < y2)
 875                 {
 876                 if (y2 < clip_y || y1 > clip_y + clip_h) return FALSE;
 877                 }
 878         else
 879                 {
 880                 if (y1 < clip_y || y2 > clip_y + clip_h) return FALSE;
 881                 }
 882
 883 #if 0
 884         if (x1 >= clip_x && x2 <= clip_x + clip_w)
 885                 {
 886                 if (y1 < y2)
 887                         {
 888                         if (y1 >= clip_y && y2 <= clip_y + clip_h) return TRUE;
 889                         }
 890                 else
 891                         {
 892                         if (y2 >= clip_y && y1 <= clip_y + clip_h) return TRUE;
 893                         }
 894                 }
 895 #endif
 896
 897         d = x2 - x1;
 898         if (d > 0.0)
 899                 {
 900                 gdouble slope;
 901
 902                 slope = (y2 - y1) / d;
 903                 if (x1 < clip_x)
 904                         {
 905                         y1 = y1 + slope * (clip_x - x1);
 906                         x1 = clip_x;
 907                         }
 908                 if (x2 > clip_x + clip_w)
 909                         {
 910                         y2 = y2 + slope * (clip_x + clip_w - x2);
 911                         x2 = clip_x + clip_w;
 912                         }
 913                 }
 914
 915         if (y1 < y2)
 916                 {
 917                 if (y2 < clip_y || y1 > clip_y + clip_h) return FALSE;
 918                 }
 919         else
 920                 {
 921                 gdouble t;
 922
 923                 if (y1 < clip_y || y2 > clip_y + clip_h) return FALSE;
 924
 925                 t = x1; x1 = x2; x2 = t;
 926                 t = y1; y1 = y2; y2 = t;
 927                 flip = !flip;
 928                 }
 929
 930         d = y2 - y1;
 931         if (d > 0.0)
 932                 {
 933                 gdouble slope;
 934
 935                 slope = (x2 - x1) / d;
 936                 if (y1 < clip_y)
 937                         {
 938                         x1 = x1 + slope * (clip_y - y1);
 939                         y1 = clip_y;
 940                         }
 941                 if (y2 > clip_y + clip_h)
 942                         {
 943                         x2 = x2 + slope * (clip_y + clip_h - y2);
 944                         y2 = clip_y + clip_h;
 945                         }
 946                 }
 947
 948         if (flip)
 949                 {
 950                 *rx1 = x2;
 951                 *ry1 = y2;
 952                 *rx2 = x1;
 953                 *ry2 = y1;
 954                 }
 955         else
 956                 {
 957                 *rx1 = x1;
 958                 *ry1 = y1;
 959                 *rx2 = x2;
 960                 *ry2 = y2;
 961                 }
 962
 963         return TRUE;
 964 }
 965
 966 void pixbuf_draw_line(GdkPixbuf *pb,
 967                       gint clip_x, gint clip_y, gint clip_w, gint clip_h,
 968                       gint x1, gint y1, gint x2, gint y2,
 969                       guint8 r, guint8 g, guint8 b, guint8 a)
 970 {
 971         gint p_alpha;
 972         gint pw, ph, prs;
 973         gint rx, ry, rw, rh;
 974         gdouble rx1, ry1, rx2, ry2;
 975         guchar *p_pix;
 976         guchar *pp;
 977         gint p_step;
 978         gdouble slope;
 979         gdouble x, y;
 980         gint px, py;
 981         gint cx1, cy1, cx2, cy2;
 982
 983         if (!pb) return;
 984
 985         pw = gdk_pixbuf_get_width(pb);
 986         ph = gdk_pixbuf_get_height(pb);
 987
 988         if (!util_clip_region(0, 0, pw, ph,
 989                               clip_x, clip_y, clip_w, clip_h,
 990                               &rx, &ry, &rw, &rh)) return;
 991         if (!util_clip_line((gdouble)rx, (gdouble)ry, (gdouble)rw, (gdouble)rh,
 992                             (gdouble)x1, (gdouble)y1, (gdouble)x2, (gdouble)y2,
 993                             &rx1, &ry1, &rx2, &ry2)) return;
 994
 995         cx1 = rx;
 996         cy1 = ry;
 997         cx2 = rx + rw;
 998         cy2 = ry + rh;
 999
1000         p_alpha = gdk_pixbuf_get_has_alpha(pb);
1001         prs = gdk_pixbuf_get_rowstride(pb);
1002         p_pix = gdk_pixbuf_get_pixels(pb);
1003
1004         p_step = (p_alpha) ? 4 : 3;
1005
1006         if (fabs(rx2 - rx1) > fabs(ry2 - ry1))
1007                 {
1008                 if (rx1 > rx2)
1009                         {
1010                         gdouble t;
1011                         t = rx1; rx1 = rx2; rx2 = t;
1012                         t = ry1; ry1 = ry2; ry2 = t;
1013                         }
1014
1015                 slope = rx2 - rx1;
1016                 if (slope != 0.0) slope = (ry2 - ry1) / slope;
1017                 for (x = rx1; x < rx2; x += 1.0)
1018                         {
1019                         px = (gint)(x + 0.5);
1020                         py = (gint)(ry1 + (x - rx1) * slope + 0.5);
1021
1022                         if (px >=  cx1 && px < cx2 && py >= cy1 && py < cy2)
1023                                 {
1024                                 pp = p_pix + py * prs + px * p_step;
1025                                 *pp = (r * a + *pp * (256-a)) >> 8;
1026                                 pp++;
1027                                 *pp = (g * a + *pp * (256-a)) >> 8;
1028                                 pp++;
1029                                 *pp = (b * a + *pp * (256-a)) >> 8;
1030                                 }
1031                         }
1032                 }
1033         else
1034                 {
1035                 if (ry1 > ry2)
1036                         {
1037                         gdouble t;
1038                         t = rx1; rx1 = rx2; rx2 = t;
1039                         t = ry1; ry1 = ry2; ry2 = t;
1040                         }
1041
1042                 slope = ry2 - ry1;
1043                 if (slope != 0.0) slope = (rx2 - rx1) / slope;
1044                 for (y = ry1; y < ry2; y += 1.0)
1045                         {
1046                         px = (gint)(rx1 + (y - ry1) * slope + 0.5);
1047                         py = (gint)(y + 0.5);
1048
1049                         if (px >=  cx1 && px < cx2 && py >= cy1 && py < cy2)
1050                                 {
1051                                 pp = p_pix + py * prs + px * p_step;
1052                                 *pp = (r * a + *pp * (256-a)) >> 8;
1053                                 pp++;
1054                                 *pp = (g * a + *pp * (256-a)) >> 8;
1055                                 pp++;
1056                                 *pp = (b * a + *pp * (256-a)) >> 8;
1057                                 }
1058                         }
1059                 }
1060 }
1061
1062 /*
1063  *-----------------------------------------------------------------------------
1064  * pixbuf drawing (fades and shadows)
1065  *-----------------------------------------------------------------------------
1066  */
1067
1068 static void pixbuf_draw_fade_linear(guchar *p_pix, gint prs, gint p_alpha,
1069                                     gint s, gint vertical, gint border,
1070                                     gint x1, gint y1, gint x2, gint y2,
1071                                     guint8 r, guint8 g, guint8 b, guint8 a)
1072 {
1073         guchar *pp;
1074         gint p_step;
1075         guint8 n = a;
1076         gint i, j;
1077
1078         p_step = (p_alpha) ? 4 : 3;
1079         for (j = y1; j < y2; j++)
1080                 {
1081                 pp = p_pix + j * prs + x1 * p_step;
1082                 if (!vertical) n = a - a * abs(j - s) / border;
1083                 for (i = x1; i < x2; i++)
1084                         {
1085                         if (vertical) n = a - a * abs(i - s) / border;
1086                         *pp = (r * n + *pp * (256-n)) >> 8;
1087                         pp++;
1088                         *pp = (g * n + *pp * (256-n)) >> 8;
1089                         pp++;
1090                         *pp = (b * n + *pp * (256-n)) >> 8;
1091                         pp++;
1092                         if (p_alpha) pp++;
1093                         }
1094                 }
1095 }
1096
1097 static void pixbuf_draw_fade_radius(guchar *p_pix, gint prs, gint p_alpha,
1098                                     gint sx, gint sy, gint border,
1099                                     gint x1, gint y1, gint x2, gint y2,
1100                                     guint8 r, guint8 g, guint8 b, guint8 a)
1101 {
1102         guchar *pp;
1103         gint p_step;
1104         gint i, j;
1105
1106         p_step = (p_alpha) ? 4 : 3;
1107         for (j = y1; j < y2; j++)
1108                 {
1109                 pp = p_pix + j * prs + x1 * p_step;
1110                 for (i = x1; i < x2; i++)
1111                         {
1112                         guint8 n;
1113                         gint r;
1114
1115                         r = MIN(border, (gint)sqrt((i-sx)*(i-sx) + (j-sy)*(j-sy)));
1116                         n = a - a * r / border;
1117                         *pp = (r * n + *pp * (256-n)) >> 8;
1118                         pp++;
1119                         *pp = (g * n + *pp * (256-n)) >> 8;
1120                         pp++;
1121                         *pp = (b * n + *pp * (256-n)) >> 8;
1122                         pp++;
1123                         if (p_alpha) pp++;
1124                         }
1125                 }
1126 }
1127
1128 void pixbuf_draw_shadow(GdkPixbuf *pb,
1129                         gint clip_x, gint clip_y, gint clip_w, gint clip_h,
1130                         gint x, gint y, gint w, gint h, gint border,
1131                         guint8 r, guint8 g, guint8 b, guint8 a)
1132 {
1133         gint p_alpha;
1134         gint pw, ph, prs;
1135         gint rx, ry, rw, rh;
1136         gint fx, fy, fw, fh;
1137         guchar *p_pix;
1138
1139         if (!pb) return;
1140
1141         pw = gdk_pixbuf_get_width(pb);
1142         ph = gdk_pixbuf_get_height(pb);
1143
1144         if (!util_clip_region(0, 0, pw, ph,
1145                               clip_x, clip_y, clip_w, clip_h,
1146                               &rx, &ry, &rw, &rh)) return;
1147
1148         p_alpha = gdk_pixbuf_get_has_alpha(pb);
1149         prs = gdk_pixbuf_get_rowstride(pb);
1150         p_pix = gdk_pixbuf_get_pixels(pb);
1151
1152         if (util_clip_region(x + border, y + border, w - border * 2, h - border * 2,
1153                              rx, ry, rw, rh,
1154                              &fx, &fy, &fw, &fh))
1155                 {
1156                 pixbuf_draw_rect_fill(pb, fx, fy, fw, fh, r, g, b, a);
1157                 }
1158
1159         if (border < 1) return;
1160
1161         if (util_clip_region(x, y + border, border, h - border * 2,
1162                              rx, ry, rw, rh,
1163                              &fx, &fy, &fw, &fh))
1164                 {
1165                 pixbuf_draw_fade_linear(p_pix, prs, p_alpha,
1166                                         x + border, TRUE, border,
1167                                         fx, fy, fx + fw, fy + fh,
1168                                         r, g, b, a);
1169                 }
1170         if (util_clip_region(x + w - border, y + border, border, h - border * 2,
1171                              rx, ry, rw, rh,
1172                              &fx, &fy, &fw, &fh))
1173                 {
1174                 pixbuf_draw_fade_linear(p_pix, prs, p_alpha,
1175                                         x + w - border, TRUE, border,
1176                                         fx, fy, fx + fw, fy + fh,
1177                                         r, g, b, a);
1178                 }
1179         if (util_clip_region(x + border, y, w - border * 2, border,
1180                              rx, ry, rw, rh,
1181                              &fx, &fy, &fw, &fh))
1182                 {
1183                 pixbuf_draw_fade_linear(p_pix, prs, p_alpha,
1184                                         y + border, FALSE, border,
1185                                         fx, fy, fx + fw, fy + fh,
1186                                         r, g, b, a);
1187                 }
1188         if (util_clip_region(x + border, y + h - border, w - border * 2, border,
1189                              rx, ry, rw, rh,
1190                              &fx, &fy, &fw, &fh))
1191                 {
1192                 pixbuf_draw_fade_linear(p_pix, prs, p_alpha,
1193                                         y + h - border, FALSE, border,
1194                                         fx, fy, fx + fw, fy + fh,
1195                                         r, g, b, a);
1196                 }
1197         if (util_clip_region(x, y, border, border,
1198                              rx, ry, rw, rh,
1199                              &fx, &fy, &fw, &fh))
1200                 {
1201                 pixbuf_draw_fade_radius(p_pix, prs, p_alpha,
1202                                         x + border, y + border, border,
1203                                         fx, fy, fx + fw, fy + fh,
1204                                         r, g, b, a);
1205                 }
1206         if (util_clip_region(x + w - border, y, border, border,
1207                              rx, ry, rw, rh,
1208                              &fx, &fy, &fw, &fh))
1209                 {
1210                 pixbuf_draw_fade_radius(p_pix, prs, p_alpha,
1211                                         x + w - border, y + border, border,
1212                                         fx, fy, fx + fw, fy + fh,
1213                                         r, g, b, a);
1214                 }
1215         if (util_clip_region(x, y + h - border, border, border,
1216                              rx, ry, rw, rh,
1217                              &fx, &fy, &fw, &fh))
1218                 {
1219                 pixbuf_draw_fade_radius(p_pix, prs, p_alpha,
1220                                         x + border, y + h - border, border,
1221                                         fx, fy, fx + fw, fy + fh,
1222                                         r, g, b, a);
1223                 }
1224         if (util_clip_region(x + w - border, y + h - border, border, border,
1225                              rx, ry, rw, rh,
1226                              &fx, &fy, &fw, &fh))
1227                 {
1228                 pixbuf_draw_fade_radius(p_pix, prs, p_alpha,
1229                                         x + w - border, y + h - border, border,
1230                                         fx, fy, fx + fw, fy + fh,
1231                                         r, g, b, a);
1232                 }
1233 }
1234
1235
1236 /*
1237  *-----------------------------------------------------------------------------
1238  * pixbuf color alterations
1239  *-----------------------------------------------------------------------------
1240  */
1241
1242 void pixbuf_desaturate_rect(GdkPixbuf *pb,
1243                             gint x, gint y, gint w, gint h)
1244 {
1245         gint p_alpha;
1246         gint pw, ph, prs;
1247         guchar *p_pix;
1248         guchar *pp;
1249         gint i, j;
1250
1251         if (!pb) return;
1252
1253         pw = gdk_pixbuf_get_width(pb);
1254         ph = gdk_pixbuf_get_height(pb);
1255
1256         if (x < 0 || x + w > pw) return;
1257         if (y < 0 || y + h > ph) return;
1258
1259         p_alpha = gdk_pixbuf_get_has_alpha(pb);
1260         prs = gdk_pixbuf_get_rowstride(pb);
1261         p_pix = gdk_pixbuf_get_pixels(pb);
1262
1263         for (i = 0; i < h; i++)
1264                 {
1265                 pp = p_pix + (y + i) * prs + (x * (p_alpha ? 4 : 3));
1266                 for (j = 0; j < w; j++)
1267                         {
1268                         guint8 grey;
1269
1270                         grey = (pp[0] + pp[1] + pp[2]) / 3;
1271                         *pp = grey;
1272                         pp++;
1273                         *pp = grey;
1274                         pp++;
1275                         *pp = grey;
1276                         pp++;
1277                         if (p_alpha) pp++;
1278                         }
1279                 }
1280 }