gfx/harfbuzz/src/hb-paint.cc

   1 /*
   2  * Copyright © 2022 Matthias Clasen
   3  *
   4  *  This is part of HarfBuzz, a text shaping library.
   5  *
   6  * Permission is hereby granted, without written agreement and without
   7  * license or royalty fees, to use, copy, modify, and distribute this
   8  * software and its documentation for any purpose, provided that the
   9  * above copyright notice and the following two paragraphs appear in
  10  * all copies of this software.
  11  *
  12  * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
  13  * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
  14  * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
  15  * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
  16  * DAMAGE.
  17  *
  18  * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
  19  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  20  * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
  21  * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
  22  * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
  23  */
  24
  25 #include "hb.hh"
  26
  27 #ifndef HB_NO_PAINT
  28
  29 #include "hb-paint.hh"
  30
  31 /**
  32  * SECTION: hb-paint
  33  * @title: hb-paint
  34  * @short_description: Glyph painting
  35  * @include: hb.h
  36  *
  37  * Functions for painting glyphs.
  38  *
  39  * The main purpose of these functions is to paint (extract) color glyph layers
  40  * from the COLRv1 table, but the API works for drawing ordinary outlines and
  41  * images as well.
  42  *
  43  * The #hb_paint_funcs_t struct can be used with hb_font_paint_glyph().
  44  **/
  45
  46 static void
  47 hb_paint_push_transform_nil (hb_paint_funcs_t *funcs, void *paint_data,
  48                              float xx, float yx,
  49                              float xy, float yy,
  50                              float dx, float dy,
  51                              void *user_data) {}
  52
  53 static void
  54 hb_paint_pop_transform_nil (hb_paint_funcs_t *funcs, void *paint_data,
  55                             void *user_data) {}
  56
  57 static hb_bool_t
  58 hb_paint_color_glyph_nil (hb_paint_funcs_t *funcs, void *paint_data,
  59                           hb_codepoint_t glyph,
  60                           hb_font_t *font,
  61                           void *user_data) { return false; }
  62
  63 static void
  64 hb_paint_push_clip_glyph_nil (hb_paint_funcs_t *funcs, void *paint_data,
  65                               hb_codepoint_t glyph,
  66                               hb_font_t *font,
  67                               void *user_data) {}
  68
  69 static void
  70 hb_paint_push_clip_rectangle_nil (hb_paint_funcs_t *funcs, void *paint_data,
  71                                   float xmin, float ymin, float xmax, float ymax,
  72                                   void *user_data) {}
  73
  74 static void
  75 hb_paint_pop_clip_nil (hb_paint_funcs_t *funcs, void *paint_data,
  76                        void *user_data) {}
  77
  78 static void
  79 hb_paint_color_nil (hb_paint_funcs_t *funcs, void *paint_data,
  80                     hb_bool_t is_foreground,
  81                     hb_color_t color,
  82                     void *user_data) {}
  83
  84 static hb_bool_t
  85 hb_paint_image_nil (hb_paint_funcs_t *funcs, void *paint_data,
  86                     hb_blob_t *image,
  87                     unsigned int width,
  88                     unsigned int height,
  89                     hb_tag_t format,
  90                     float slant_xy,
  91                     hb_glyph_extents_t *extents,
  92                     void *user_data) { return false; }
  93
  94 static void
  95 hb_paint_linear_gradient_nil (hb_paint_funcs_t *funcs, void *paint_data,
  96                               hb_color_line_t *color_line,
  97                               float x0, float y0,
  98                               float x1, float y1,
  99                               float x2, float y2,
 100                               void *user_data) {}
 101
 102 static void
 103 hb_paint_radial_gradient_nil (hb_paint_funcs_t *funcs, void *paint_data,
 104                               hb_color_line_t *color_line,
 105                               float x0, float y0, float r0,
 106                               float x1, float y1, float r1,
 107                               void *user_data) {}
 108
 109 static void
 110 hb_paint_sweep_gradient_nil (hb_paint_funcs_t *funcs, void *paint_data,
 111                              hb_color_line_t *color_line,
 112                              float x0, float y0,
 113                              float start_angle,
 114                              float end_angle,
 115                              void *user_data) {}
 116
 117 static void
 118 hb_paint_push_group_nil (hb_paint_funcs_t *funcs, void *paint_data,
 119                          void *user_data) {}
 120
 121 static void
 122 hb_paint_pop_group_nil (hb_paint_funcs_t *funcs, void *paint_data,
 123                         hb_paint_composite_mode_t mode,
 124                         void *user_data) {}
 125
 126 static hb_bool_t
 127 hb_paint_custom_palette_color_nil (hb_paint_funcs_t *funcs, void *paint_data,
 128                                    unsigned int color_index,
 129                                    hb_color_t *color,
 130                                    void *user_data) { return false; }
 131
 132 static bool
 133 _hb_paint_funcs_set_preamble (hb_paint_funcs_t  *funcs,
 134                              bool                func_is_null,
 135                              void              **user_data,
 136                              hb_destroy_func_t  *destroy)
 137 {
 138   if (hb_object_is_immutable (funcs))
 139   {
 140     if (*destroy)
 141       (*destroy) (*user_data);
 142     return false;
 143   }
 144
 145   if (func_is_null)
 146   {
 147     if (*destroy)
 148       (*destroy) (*user_data);
 149     *destroy = nullptr;
 150     *user_data = nullptr;
 151   }
 152
 153   return true;
 154 }
 155
 156 static bool
 157 _hb_paint_funcs_set_middle (hb_paint_funcs_t  *funcs,
 158                             void              *user_data,
 159                             hb_destroy_func_t  destroy)
 160 {
 161   if (user_data && !funcs->user_data)
 162   {
 163     funcs->user_data = (decltype (funcs->user_data)) hb_calloc (1, sizeof (*funcs->user_data));
 164     if (unlikely (!funcs->user_data))
 165       goto fail;
 166   }
 167   if (destroy && !funcs->destroy)
 168   {
 169     funcs->destroy = (decltype (funcs->destroy)) hb_calloc (1, sizeof (*funcs->destroy));
 170     if (unlikely (!funcs->destroy))
 171       goto fail;
 172   }
 173
 174   return true;
 175
 176 fail:
 177   if (destroy)
 178     (destroy) (user_data);
 179   return false;
 180 }
 181
 182 #define HB_PAINT_FUNC_IMPLEMENT(name)                                           \
 183                                                                                 \
 184 void                                                                            \
 185 hb_paint_funcs_set_##name##_func (hb_paint_funcs_t         *funcs,              \
 186                                   hb_paint_##name##_func_t  func,               \
 187                                   void                     *user_data,          \
 188                                   hb_destroy_func_t         destroy)            \
 189 {                                                                               \
 190   if (!_hb_paint_funcs_set_preamble (funcs, !func, &user_data, &destroy))       \
 191       return;                                                                   \
 192                                                                                 \
 193   if (funcs->destroy && funcs->destroy->name)                                   \
 194     funcs->destroy->name (!funcs->user_data ? nullptr : funcs->user_data->name);\
 195                                                                                 \
 196   if (!_hb_paint_funcs_set_middle (funcs, user_data, destroy))                  \
 197       return;                                                                   \
 198                                                                                 \
 199   if (func)                                                                     \
 200     funcs->func.name = func;                                                    \
 201   else                                                                          \
 202     funcs->func.name = hb_paint_##name##_nil;                                   \
 203                                                                                 \
 204   if (funcs->user_data)                                                         \
 205     funcs->user_data->name = user_data;                                         \
 206   if (funcs->destroy)                                                           \
 207     funcs->destroy->name = destroy;                                             \
 208 }
 209
 210 HB_PAINT_FUNCS_IMPLEMENT_CALLBACKS
 211 #undef HB_PAINT_FUNC_IMPLEMENT
 212
 213 /**
 214  * hb_paint_funcs_create:
 215  *
 216  * Creates a new #hb_paint_funcs_t structure of paint functions.
 217  *
 218  * The initial reference count of 1 should be released with hb_paint_funcs_destroy()
 219  * when you are done using the #hb_paint_funcs_t. This function never returns
 220  * `NULL`. If memory cannot be allocated, a special singleton #hb_paint_funcs_t
 221  * object will be returned.
 222  *
 223  * Returns value: (transfer full): the paint-functions structure
 224  *
 225  * Since: 7.0.0
 226  */
 227 hb_paint_funcs_t *
 228 hb_paint_funcs_create ()
 229 {
 230   hb_paint_funcs_t *funcs;
 231   if (unlikely (!(funcs = hb_object_create<hb_paint_funcs_t> ())))
 232     return const_cast<hb_paint_funcs_t *> (&Null (hb_paint_funcs_t));
 233
 234   funcs->func =  Null (hb_paint_funcs_t).func;
 235
 236   return funcs;
 237 }
 238
 239 DEFINE_NULL_INSTANCE (hb_paint_funcs_t) =
 240 {
 241   HB_OBJECT_HEADER_STATIC,
 242
 243   {
 244 #define HB_PAINT_FUNC_IMPLEMENT(name) hb_paint_##name##_nil,
 245     HB_PAINT_FUNCS_IMPLEMENT_CALLBACKS
 246 #undef HB_PAINT_FUNC_IMPLEMENT
 247   }
 248 };
 249
 250 /**
 251  * hb_paint_funcs_get_empty:
 252  *
 253  * Fetches the singleton empty paint-functions structure.
 254  *
 255  * Return value: (transfer full): The empty paint-functions structure
 256  *
 257  * Since: 7.0.0
 258  **/
 259 hb_paint_funcs_t *
 260 hb_paint_funcs_get_empty ()
 261 {
 262   return const_cast<hb_paint_funcs_t *> (&Null (hb_paint_funcs_t));
 263 }
 264
 265 /**
 266  * hb_paint_funcs_reference: (skip)
 267  * @funcs: The paint-functions structure
 268  *
 269  * Increases the reference count on a paint-functions structure.
 270  *
 271  * This prevents @funcs from being destroyed until a matching
 272  * call to hb_paint_funcs_destroy() is made.
 273  *
 274  * Return value: The paint-functions structure
 275  *
 276  * Since: 7.0.0
 277  */
 278 hb_paint_funcs_t *
 279 hb_paint_funcs_reference (hb_paint_funcs_t *funcs)
 280 {
 281   return hb_object_reference (funcs);
 282 }
 283
 284 /**
 285  * hb_paint_funcs_destroy: (skip)
 286  * @funcs: The paint-functions structure
 287  *
 288  * Decreases the reference count on a paint-functions structure.
 289  *
 290  * When the reference count reaches zero, the structure
 291  * is destroyed, freeing all memory.
 292  *
 293  * Since: 7.0.0
 294  */
 295 void
 296 hb_paint_funcs_destroy (hb_paint_funcs_t *funcs)
 297 {
 298   if (!hb_object_destroy (funcs)) return;
 299
 300   if (funcs->destroy)
 301   {
 302 #define HB_PAINT_FUNC_IMPLEMENT(name) \
 303     if (funcs->destroy->name) funcs->destroy->name (!funcs->user_data ? nullptr : funcs->user_data->name);
 304       HB_PAINT_FUNCS_IMPLEMENT_CALLBACKS
 305 #undef HB_PAINT_FUNC_IMPLEMENT
 306   }
 307
 308   hb_free (funcs->destroy);
 309   hb_free (funcs->user_data);
 310   hb_free (funcs);
 311 }
 312
 313 /**
 314  * hb_paint_funcs_set_user_data: (skip)
 315  * @funcs: The paint-functions structure
 316  * @key: The user-data key
 317  * @data: A pointer to the user data
 318  * @destroy: (nullable): A callback to call when @data is not needed anymore
 319  * @replace: Whether to replace an existing data with the same key
 320  *
 321  * Attaches a user-data key/data pair to the specified paint-functions structure.
 322  *
 323  * Return value: `true` if success, `false` otherwise
 324  *
 325  * Since: 7.0.0
 326  **/
 327 hb_bool_t
 328 hb_paint_funcs_set_user_data (hb_paint_funcs_t *funcs,
 329                              hb_user_data_key_t *key,
 330                              void *              data,
 331                              hb_destroy_func_t   destroy,
 332                              hb_bool_t           replace)
 333 {
 334   return hb_object_set_user_data (funcs, key, data, destroy, replace);
 335 }
 336
 337 /**
 338  * hb_paint_funcs_get_user_data: (skip)
 339  * @funcs: The paint-functions structure
 340  * @key: The user-data key to query
 341  *
 342  * Fetches the user-data associated with the specified key,
 343  * attached to the specified paint-functions structure.
 344  *
 345  * Return value: (transfer none): A pointer to the user data
 346  *
 347  * Since: 7.0.0
 348  **/
 349 void *
 350 hb_paint_funcs_get_user_data (const hb_paint_funcs_t *funcs,
 351                              hb_user_data_key_t       *key)
 352 {
 353   return hb_object_get_user_data (funcs, key);
 354 }
 355
 356 /**
 357  * hb_paint_funcs_make_immutable:
 358  * @funcs: The paint-functions structure
 359  *
 360  * Makes a paint-functions structure immutable.
 361  *
 362  * After this call, all attempts to set one of the callbacks
 363  * on @funcs will fail.
 364  *
 365  * Since: 7.0.0
 366  */
 367 void
 368 hb_paint_funcs_make_immutable (hb_paint_funcs_t *funcs)
 369 {
 370   if (hb_object_is_immutable (funcs))
 371     return;
 372
 373   hb_object_make_immutable (funcs);
 374 }
 375
 376 /**
 377  * hb_paint_funcs_is_immutable:
 378  * @funcs: The paint-functions structure
 379  *
 380  * Tests whether a paint-functions structure is immutable.
 381  *
 382  * Return value: `true` if @funcs is immutable, `false` otherwise
 383  *
 384  * Since: 7.0.0
 385  */
 386 hb_bool_t
 387 hb_paint_funcs_is_immutable (hb_paint_funcs_t *funcs)
 388 {
 389   return hb_object_is_immutable (funcs);
 390 }
 391
 392
 393 /**
 394  * hb_color_line_get_color_stops:
 395  * @color_line: a #hb_color_line_t object
 396  * @start: the index of the first color stop to return
 397  * @count: (inout) (optional): Input = the maximum number of feature tags to return;
 398  *     Output = the actual number of feature tags returned (may be zero)
 399  * @color_stops: (out) (array length=count) (optional): Array of #hb_color_stop_t to populate
 400  *
 401  * Fetches a list of color stops from the given color line object.
 402  *
 403  * Note that due to variations being applied, the returned color stops
 404  * may be out of order. It is the callers responsibility to ensure that
 405  * color stops are sorted by their offset before they are used.
 406  *
 407  * Return value: the total number of color stops in @color_line
 408  *
 409  * Since: 7.0.0
 410  */
 411 unsigned int
 412 hb_color_line_get_color_stops (hb_color_line_t *color_line,
 413                                unsigned int start,
 414                                unsigned int *count,
 415                                hb_color_stop_t *color_stops)
 416 {
 417   return color_line->get_color_stops (color_line,
 418                                       color_line->data,
 419                                       start, count,
 420                                       color_stops,
 421                                       color_line->get_color_stops_user_data);
 422 }
 423
 424 /**
 425  * hb_color_line_get_extend:
 426  * @color_line: a #hb_color_line_t object
 427  *
 428  * Fetches the extend mode of the color line object.
 429  *
 430  * Return value: the extend mode of @color_line
 431  *
 432  * Since: 7.0.0
 433  */
 434 hb_paint_extend_t
 435 hb_color_line_get_extend (hb_color_line_t *color_line)
 436 {
 437   return color_line->get_extend (color_line,
 438                                  color_line->data,
 439                                  color_line->get_extend_user_data);
 440 }
 441
 442
 443 /**
 444  * hb_paint_push_transform:
 445  * @funcs: paint functions
 446  * @paint_data: associated data passed by the caller
 447  * @xx: xx component of the transform matrix
 448  * @yx: yx component of the transform matrix
 449  * @xy: xy component of the transform matrix
 450  * @yy: yy component of the transform matrix
 451  * @dx: dx component of the transform matrix
 452  * @dy: dy component of the transform matrix
 453  *
 454  * Perform a "push-transform" paint operation.
 455  *
 456  * Since: 7.0.0
 457  */
 458 void
 459 hb_paint_push_transform (hb_paint_funcs_t *funcs, void *paint_data,
 460                          float xx, float yx,
 461                          float xy, float yy,
 462                          float dx, float dy)
 463 {
 464   funcs->push_transform (paint_data, xx, yx, xy, yy, dx, dy);
 465 }
 466
 467 /**
 468  * hb_paint_pop_transform:
 469  * @funcs: paint functions
 470  * @paint_data: associated data passed by the caller
 471  *
 472  * Perform a "pop-transform" paint operation.
 473  *
 474  * Since: 7.0.0
 475  */
 476 void
 477 hb_paint_pop_transform (hb_paint_funcs_t *funcs, void *paint_data)
 478 {
 479   funcs->pop_transform (paint_data);
 480 }
 481
 482 /**
 483  * hb_paint_color_glyph:
 484  * @funcs: paint functions
 485  * @paint_data: associated data passed by the caller
 486  * @glyph: the glyph ID
 487  * @font: the font
 488  *
 489  * Perform a "color-glyph" paint operation.
 490  *
 491  * Since: 8.2.0
 492  */
 493 hb_bool_t
 494 hb_paint_color_glyph (hb_paint_funcs_t *funcs, void *paint_data,
 495                       hb_codepoint_t glyph,
 496                       hb_font_t *font)
 497 {
 498   return funcs->color_glyph (paint_data, glyph, font);
 499 }
 500
 501 /**
 502  * hb_paint_push_clip_glyph:
 503  * @funcs: paint functions
 504  * @paint_data: associated data passed by the caller
 505  * @glyph: the glyph ID
 506  * @font: the font
 507  *
 508  * Perform a "push-clip-glyph" paint operation.
 509  *
 510  * Since: 7.0.0
 511  */
 512 void
 513 hb_paint_push_clip_glyph (hb_paint_funcs_t *funcs, void *paint_data,
 514                           hb_codepoint_t glyph,
 515                           hb_font_t *font)
 516 {
 517   funcs->push_clip_glyph (paint_data, glyph, font);
 518 }
 519
 520 /**
 521  * hb_paint_push_clip_rectangle:
 522  * @funcs: paint functions
 523  * @paint_data: associated data passed by the caller
 524  * @xmin: min X for the rectangle
 525  * @ymin: min Y for the rectangle
 526  * @xmax: max X for the rectangle
 527  * @ymax: max Y for the rectangle
 528  *
 529  * Perform a "push-clip-rect" paint operation.
 530  *
 531  * Since: 7.0.0
 532  */
 533 void
 534 hb_paint_push_clip_rectangle (hb_paint_funcs_t *funcs, void *paint_data,
 535                               float xmin, float ymin, float xmax, float ymax)
 536 {
 537   funcs->push_clip_rectangle (paint_data, xmin, ymin, xmax, ymax);
 538 }
 539
 540 /**
 541  * hb_paint_pop_clip:
 542  * @funcs: paint functions
 543  * @paint_data: associated data passed by the caller
 544  *
 545  * Perform a "pop-clip" paint operation.
 546  *
 547  * Since: 7.0.0
 548  */
 549 void
 550 hb_paint_pop_clip (hb_paint_funcs_t *funcs, void *paint_data)
 551 {
 552   funcs->pop_clip (paint_data);
 553 }
 554
 555 /**
 556  * hb_paint_color:
 557  * @funcs: paint functions
 558  * @paint_data: associated data passed by the caller
 559  * @is_foreground: whether the color is the foreground
 560  * @color: The color to use
 561  *
 562  * Perform a "color" paint operation.
 563  *
 564  * Since: 7.0.0
 565  */
 566 void
 567 hb_paint_color (hb_paint_funcs_t *funcs, void *paint_data,
 568                 hb_bool_t is_foreground,
 569                 hb_color_t color)
 570 {
 571   funcs->color (paint_data, is_foreground, color);
 572 }
 573
 574 /**
 575  * hb_paint_image:
 576  * @funcs: paint functions
 577  * @paint_data: associated data passed by the caller
 578  * @image: image data
 579  * @width: width of the raster image in pixels, or 0
 580  * @height: height of the raster image in pixels, or 0
 581  * @format: the image format as a tag
 582  * @slant: the synthetic slant ratio to be applied to the image during rendering
 583  * @extents: (nullable): the extents of the glyph
 584  *
 585  * Perform a "image" paint operation.
 586  *
 587  * Since: 7.0.0
 588  */
 589 void
 590 hb_paint_image (hb_paint_funcs_t *funcs, void *paint_data,
 591                 hb_blob_t *image,
 592                 unsigned int width,
 593                 unsigned int height,
 594                 hb_tag_t format,
 595                 float slant,
 596                 hb_glyph_extents_t *extents)
 597 {
 598   funcs->image (paint_data, image, width, height, format, slant, extents);
 599 }
 600
 601 /**
 602  * hb_paint_linear_gradient:
 603  * @funcs: paint functions
 604  * @paint_data: associated data passed by the caller
 605  * @color_line: Color information for the gradient
 606  * @x0: X coordinate of the first point
 607  * @y0: Y coordinate of the first point
 608  * @x1: X coordinate of the second point
 609  * @y1: Y coordinate of the second point
 610  * @x2: X coordinate of the third point
 611  * @y2: Y coordinate of the third point
 612  *
 613  * Perform a "linear-gradient" paint operation.
 614  *
 615  * Since: 7.0.0
 616  */
 617 void
 618 hb_paint_linear_gradient (hb_paint_funcs_t *funcs, void *paint_data,
 619                           hb_color_line_t *color_line,
 620                           float x0, float y0,
 621                           float x1, float y1,
 622                           float x2, float y2)
 623 {
 624   funcs->linear_gradient (paint_data, color_line, x0, y0, x1, y1, x2, y2);
 625 }
 626
 627 /**
 628  * hb_paint_radial_gradient:
 629  * @funcs: paint functions
 630  * @paint_data: associated data passed by the caller
 631  * @color_line: Color information for the gradient
 632  * @x0: X coordinate of the first circle's center
 633  * @y0: Y coordinate of the first circle's center
 634  * @r0: radius of the first circle
 635  * @x1: X coordinate of the second circle's center
 636  * @y1: Y coordinate of the second circle's center
 637  * @r1: radius of the second circle
 638  *
 639  * Perform a "radial-gradient" paint operation.
 640  *
 641  * Since: 7.0.0
 642  */
 643 void
 644 hb_paint_radial_gradient (hb_paint_funcs_t *funcs, void *paint_data,
 645                           hb_color_line_t *color_line,
 646                           float x0, float y0, float r0,
 647                           float x1, float y1, float r1)
 648 {
 649   funcs->radial_gradient (paint_data, color_line, x0, y0, r0, y1, x1, r1);
 650 }
 651
 652 /**
 653  * hb_paint_sweep_gradient:
 654  * @funcs: paint functions
 655  * @paint_data: associated data passed by the caller
 656  * @color_line: Color information for the gradient
 657  * @x0: X coordinate of the circle's center
 658  * @y0: Y coordinate of the circle's center
 659  * @start_angle: the start angle
 660  * @end_angle: the end angle
 661  *
 662  * Perform a "sweep-gradient" paint operation.
 663  *
 664  * Since: 7.0.0
 665  */
 666 void
 667 hb_paint_sweep_gradient (hb_paint_funcs_t *funcs, void *paint_data,
 668                          hb_color_line_t *color_line,
 669                          float x0, float y0,
 670                          float start_angle, float end_angle)
 671 {
 672   funcs->sweep_gradient (paint_data, color_line, x0, y0, start_angle, end_angle);
 673 }
 674
 675 /**
 676  * hb_paint_push_group:
 677  * @funcs: paint functions
 678  * @paint_data: associated data passed by the caller
 679  *
 680  * Perform a "push-group" paint operation.
 681  *
 682  * Since: 7.0.0
 683  */
 684 void
 685 hb_paint_push_group (hb_paint_funcs_t *funcs, void *paint_data)
 686 {
 687   funcs->push_group (paint_data);
 688 }
 689
 690 /**
 691  * hb_paint_pop_group:
 692  * @funcs: paint functions
 693  * @paint_data: associated data passed by the caller
 694  * @mode: the compositing mode to use
 695  *
 696  * Perform a "pop-group" paint operation.
 697  *
 698  * Since: 7.0.0
 699  */
 700 void
 701 hb_paint_pop_group (hb_paint_funcs_t *funcs, void *paint_data,
 702                     hb_paint_composite_mode_t mode)
 703 {
 704   funcs->pop_group (paint_data, mode);
 705 }
 706
 707 /**
 708  * hb_paint_custom_palette_color:
 709  * @funcs: paint functions
 710  * @paint_data: associated data passed by the caller
 711  * @color_index: color index
 712  * @color: (out): fetched color
 713  *
 714  * Gets the custom palette color for @color_index.
 715  *
 716  * Return value: `true` if found, `false` otherwise
 717  *
 718  * Since: 7.0.0
 719  */
 720 hb_bool_t
 721 hb_paint_custom_palette_color (hb_paint_funcs_t *funcs, void *paint_data,
 722                                unsigned int color_index,
 723                                hb_color_t *color)
 724 {
 725   return funcs->custom_palette_color (paint_data, color_index, color);
 726 }
 727
 728 #endif