src/cairoint.h

   1 /* cairo - a vector graphics library with display and print output
   2  *
   3  * Copyright © 2002 University of Southern California
   4  * Copyright © 2005 Red Hat, Inc.
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it either under the terms of the GNU Lesser General Public
   8  * License version 2.1 as published by the Free Software Foundation
   9  * (the "LGPL") or, at your option, under the terms of the Mozilla
  10  * Public License Version 1.1 (the "MPL"). If you do not alter this
  11  * notice, a recipient may use your version of this file under either
  12  * the MPL or the LGPL.
  13  *
  14  * You should have received a copy of the LGPL along with this library
  15  * in the file COPYING-LGPL-2.1; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
  17  * You should have received a copy of the MPL along with this library
  18  * in the file COPYING-MPL-1.1
  19  *
  20  * The contents of this file are subject to the Mozilla Public License
  21  * Version 1.1 (the "License"); you may not use this file except in
  22  * compliance with the License. You may obtain a copy of the License at
  23  * http://www.mozilla.org/MPL/
  24  *
  25  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
  26  * OF ANY KIND, either express or implied. See the LGPL or the MPL for
  27  * the specific language governing rights and limitations.
  28  *
  29  * The Original Code is the cairo graphics library.
  30  *
  31  * The Initial Developer of the Original Code is University of Southern
  32  * California.
  33  *
  34  * Contributor(s):
  35  *      Carl D. Worth <cworth@cworth.org>
  36  */
  37
  38 /*
  39  * These definitions are solely for use by the implementation of cairo
  40  * and constitute no kind of standard.  If you need any of these
  41  * functions, please drop me a note.  Either the library needs new
  42  * functionality, or there's a way to do what you need using the
  43  * existing published interfaces. cworth@cworth.org
  44  */
  45
  46 #ifndef _CAIROINT_H_
  47 #define _CAIROINT_H_
  48
  49 #if HAVE_CONFIG_H
  50 #include "config.h"
  51 #endif
  52
  53 #ifdef _MSC_VER
  54 #define cairo_public __declspec(dllexport)
  55 #endif
  56
  57 #include <assert.h>
  58 #include <stdlib.h>
  59 #include <string.h>
  60 #include <stdarg.h>
  61 #include <stddef.h>
  62
  63 #ifdef _MSC_VER
  64 #define _USE_MATH_DEFINES
  65 #endif
  66 #include <math.h>
  67 #include <limits.h>
  68 #include <stdio.h>
  69
  70 #include "cairo.h"
  71 #include <pixman.h>
  72
  73 #include "cairo-compiler-private.h"
  74 #include "cairo-error-private.h"
  75
  76 #if CAIRO_HAS_PDF_SURFACE    || \
  77     CAIRO_HAS_PS_SURFACE     || \
  78     CAIRO_HAS_SCRIPT_SURFACE || \
  79     CAIRO_HAS_XML_SURFACE
  80 #define CAIRO_HAS_DEFLATE_STREAM 1
  81 #endif
  82
  83 #if CAIRO_HAS_PS_SURFACE  || \
  84     CAIRO_HAS_PDF_SURFACE || \
  85     CAIRO_HAS_SVG_SURFACE || \
  86     CAIRO_HAS_WIN32_SURFACE
  87 #define CAIRO_HAS_FONT_SUBSET 1
  88 #endif
  89
  90 #if CAIRO_HAS_PS_SURFACE  || \
  91     CAIRO_HAS_PDF_SURFACE || \
  92     CAIRO_HAS_FONT_SUBSET
  93 #define CAIRO_HAS_PDF_OPERATORS 1
  94 #endif
  95
  96 CAIRO_BEGIN_DECLS
  97
  98 #if _WIN32 && !_WIN32_WCE /* Permissions on WinCE? No worries! */
  99 cairo_private FILE *
 100 _cairo_win32_tmpfile (void);
 101 #define tmpfile() _cairo_win32_tmpfile()
 102 #endif
 103
 104 #undef MIN
 105 #define MIN(a, b) ((a) < (b) ? (a) : (b))
 106
 107 #undef MAX
 108 #define MAX(a, b) ((a) > (b) ? (a) : (b))
 109
 110 #ifndef FALSE
 111 #define FALSE 0
 112 #endif
 113
 114 #ifndef TRUE
 115 #define TRUE 1
 116 #endif
 117
 118 #ifndef M_PI
 119 #define M_PI 3.14159265358979323846
 120 #endif
 121
 122 #ifndef M_SQRT2
 123 #define M_SQRT2 1.41421356237309504880
 124 #endif
 125
 126 #ifndef M_SQRT1_2
 127 #define M_SQRT1_2 0.707106781186547524400844362104849039
 128 #endif
 129
 130 #undef  ARRAY_LENGTH
 131 #define ARRAY_LENGTH(__array) ((int) (sizeof (__array) / sizeof (__array[0])))
 132
 133 #undef STRINGIFY
 134 #undef STRINGIFY_ARG
 135 #define STRINGIFY(macro_or_string)    STRINGIFY_ARG (macro_or_string)
 136 #define STRINGIFY_ARG(contents)       #contents
 137
 138 #if defined (__GNUC__)
 139 #define cairo_container_of(ptr, type, member) ({ \
 140     const __typeof__ (((type *) 0)->member) *mptr__ = (ptr); \
 141     (type *) ((char *) mptr__ - offsetof (type, member)); \
 142 })
 143 #else
 144 #define cairo_container_of(ptr, type, member) \
 145     ((type *)((char *) (ptr) - (char *) &((type *)0)->member))
 146 #endif
 147
 148
 149 #define ASSERT_NOT_REACHED              \
 150 do {                                    \
 151     assert (!"reached");                \
 152 } while (0)
 153 #define COMPILE_TIME_ASSERT1(condition, line)           \
 154     typedef int compile_time_assertion_at_line_##line##_failed [(condition)?1:-1]
 155 #define COMPILE_TIME_ASSERT0(condition, line)   COMPILE_TIME_ASSERT1(condition, line)
 156 #define COMPILE_TIME_ASSERT(condition)          COMPILE_TIME_ASSERT0(condition, __LINE__)
 157
 158 #define CAIRO_ALPHA_IS_CLEAR(alpha) ((alpha) <= ((double)0x00ff / (double)0xffff))
 159 #define CAIRO_ALPHA_SHORT_IS_CLEAR(alpha) ((alpha) <= 0x00ff)
 160
 161 #define CAIRO_ALPHA_IS_OPAQUE(alpha) ((alpha) >= ((double)0xff00 / (double)0xffff))
 162 #define CAIRO_ALPHA_SHORT_IS_OPAQUE(alpha) ((alpha) >= 0xff00)
 163 #define CAIRO_ALPHA_IS_ZERO(alpha) ((alpha) <= 0.0)
 164
 165 #define CAIRO_COLOR_IS_CLEAR(color) CAIRO_ALPHA_SHORT_IS_CLEAR ((color)->alpha_short)
 166 #define CAIRO_COLOR_IS_OPAQUE(color) CAIRO_ALPHA_SHORT_IS_OPAQUE ((color)->alpha_short)
 167
 168 /* Reverse the bits in a byte with 7 operations (no 64-bit):
 169  * Devised by Sean Anderson, July 13, 2001.
 170  * Source: http://graphics.stanford.edu/~seander/bithacks.html#ReverseByteWith32Bits
 171  */
 172 #define CAIRO_BITSWAP8(c) ((((c) * 0x0802LU & 0x22110LU) | ((c) * 0x8020LU & 0x88440LU)) * 0x10101LU >> 16)
 173
 174 /* Return the number of 1 bits in mask.
 175  *
 176  * GCC 3.4 supports a "population count" builtin, which on many targets is
 177  * implemented with a single instruction. There is a fallback definition
 178  * in libgcc in case a target does not have one, which should be just as
 179  * good as the open-coded solution below, (which is "HACKMEM 169").
 180  */
 181 static inline int cairo_const
 182 _cairo_popcount (uint32_t mask)
 183 {
 184 #if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
 185     return __builtin_popcount (mask);
 186 #else
 187     register int y;
 188
 189     y = (mask >> 1) &033333333333;
 190     y = mask - y - ((y >>1) & 033333333333);
 191     return (((y + (y >> 3)) & 030707070707) % 077);
 192 #endif
 193 }
 194
 195 static cairo_always_inline cairo_bool_t
 196 _cairo_is_little_endian (void)
 197 {
 198     static const int i = 1;
 199     return *((char *) &i) == 0x01;
 200 }
 201
 202 #ifdef WORDS_BIGENDIAN
 203 #define CAIRO_BITSWAP8_IF_LITTLE_ENDIAN(c) (c)
 204 #else
 205 #define CAIRO_BITSWAP8_IF_LITTLE_ENDIAN(c) CAIRO_BITSWAP8(c)
 206 #endif
 207
 208 #ifdef WORDS_BIGENDIAN
 209
 210 #define cpu_to_be16(v) (v)
 211 #define be16_to_cpu(v) (v)
 212 #define cpu_to_be32(v) (v)
 213 #define be32_to_cpu(v) (v)
 214
 215 #else
 216
 217 static inline uint16_t cairo_const
 218 cpu_to_be16(uint16_t v)
 219 {
 220     return (v << 8) | (v >> 8);
 221 }
 222
 223 static inline uint16_t cairo_const
 224 be16_to_cpu(uint16_t v)
 225 {
 226     return cpu_to_be16 (v);
 227 }
 228
 229 static inline uint32_t cairo_const
 230 cpu_to_be32(uint32_t v)
 231 {
 232     return (cpu_to_be16 (v) << 16) | cpu_to_be16 (v >> 16);
 233 }
 234
 235 static inline uint32_t cairo_const
 236 be32_to_cpu(uint32_t v)
 237 {
 238     return cpu_to_be32 (v);
 239 }
 240
 241 #endif
 242
 243
 244 /* The glibc versions of ispace() and isdigit() are slow in UTF-8 locales.
 245  */
 246
 247 static inline int cairo_const
 248 _cairo_isspace (int c)
 249 {
 250     return (c == 0x20 || (c >= 0x09 && c <= 0x0d));
 251 }
 252
 253 static inline int cairo_const
 254 _cairo_isdigit (int c)
 255 {
 256     return (c >= '0' && c <= '9');
 257 }
 258
 259 #include "cairo-types-private.h"
 260 #include "cairo-cache-private.h"
 261 #include "cairo-reference-count-private.h"
 262 #include "cairo-spans-private.h"
 263 #include "cairo-surface-private.h"
 264
 265 cairo_private void
 266 _cairo_box_from_doubles (cairo_box_t *box,
 267                          double *x1, double *y1,
 268                          double *x2, double *y2);
 269
 270 cairo_private void
 271 _cairo_box_to_doubles (const cairo_box_t *box,
 272                        double *x1, double *y1,
 273                        double *x2, double *y2);
 274
 275 cairo_private void
 276 _cairo_box_from_rectangle (cairo_box_t                 *box,
 277                            const cairo_rectangle_int_t *rectangle);
 278
 279 cairo_private void
 280 _cairo_box_round_to_rectangle (const cairo_box_t     *box,
 281                                cairo_rectangle_int_t *rectangle);
 282
 283 cairo_private void
 284 _cairo_box_add_curve_to (cairo_box_t         *extents,
 285                          const cairo_point_t *a,
 286                          const cairo_point_t *b,
 287                          const cairo_point_t *c,
 288                          const cairo_point_t *d);
 289
 290 cairo_private void
 291 _cairo_boxes_get_extents (const cairo_box_t *boxes,
 292                           int num_boxes,
 293                           cairo_box_t *extents);
 294
 295 cairo_private extern const cairo_rectangle_int_t _cairo_empty_rectangle;
 296 cairo_private extern const cairo_rectangle_int_t _cairo_unbounded_rectangle;
 297
 298 static inline void
 299 _cairo_unbounded_rectangle_init (cairo_rectangle_int_t *rect)
 300 {
 301     *rect = _cairo_unbounded_rectangle;
 302 }
 303
 304 cairo_private_no_warn cairo_bool_t
 305 _cairo_rectangle_intersect (cairo_rectangle_int_t *dst,
 306                             const cairo_rectangle_int_t *src);
 307
 308 static inline cairo_bool_t
 309 _cairo_rectangle_intersects (const cairo_rectangle_int_t *dst,
 310                              const cairo_rectangle_int_t *src)
 311 {
 312     return !(src->x >= dst->x + (int) dst->width ||
 313              src->x + (int) src->width <= dst->x ||
 314              src->y >= dst->y + (int) dst->height ||
 315              src->y + (int) src->height <= dst->y);
 316 }
 317
 318 static inline cairo_bool_t
 319 _cairo_rectangle_contains_rectangle (const cairo_rectangle_int_t *a,
 320                                      const cairo_rectangle_int_t *b)
 321 {
 322     return (a->x <= b->x &&
 323             a->x + (int) a->width >= b->x + (int) b->width &&
 324             a->y <= b->y &&
 325             a->y + (int) a->height >= b->y + (int) b->height);
 326 }
 327
 328 cairo_private void
 329 _cairo_rectangle_int_from_double (cairo_rectangle_int_t *recti,
 330                                   const cairo_rectangle_t *rectf);
 331
 332 /* Extends the dst rectangle to also contain src.
 333  * If one of the rectangles is empty, the result is undefined
 334  */
 335 cairo_private void
 336 _cairo_rectangle_union (cairo_rectangle_int_t *dst,
 337                         const cairo_rectangle_int_t *src);
 338
 339 cairo_private cairo_bool_t
 340 _cairo_box_intersects_line_segment (cairo_box_t *box,
 341                                     cairo_line_t *line) cairo_pure;
 342
 343 cairo_private cairo_bool_t
 344 _cairo_spline_intersects (const cairo_point_t *a,
 345                           const cairo_point_t *b,
 346                           const cairo_point_t *c,
 347                           const cairo_point_t *d,
 348                           const cairo_box_t *box) cairo_pure;
 349
 350 typedef struct {
 351     const cairo_user_data_key_t *key;
 352     void *user_data;
 353     cairo_destroy_func_t destroy;
 354 } cairo_user_data_slot_t;
 355
 356 cairo_private void
 357 _cairo_user_data_array_init (cairo_user_data_array_t *array);
 358
 359 cairo_private void
 360 _cairo_user_data_array_fini (cairo_user_data_array_t *array);
 361
 362 cairo_private void *
 363 _cairo_user_data_array_get_data (cairo_user_data_array_t     *array,
 364                                  const cairo_user_data_key_t *key);
 365
 366 cairo_private cairo_status_t
 367 _cairo_user_data_array_set_data (cairo_user_data_array_t     *array,
 368                                  const cairo_user_data_key_t *key,
 369                                  void                        *user_data,
 370                                  cairo_destroy_func_t         destroy);
 371
 372 cairo_private cairo_status_t
 373 _cairo_user_data_array_copy (cairo_user_data_array_t            *dst,
 374                              const cairo_user_data_array_t      *src);
 375
 376 cairo_private void
 377 _cairo_user_data_array_foreach (cairo_user_data_array_t     *array,
 378                                 void (*func) (const void *key,
 379                                               void *elt,
 380                                               void *closure),
 381                                 void *closure);
 382
 383 #define _CAIRO_HASH_INIT_VALUE 5381
 384
 385 cairo_private unsigned long
 386 _cairo_hash_string (const char *c);
 387
 388 cairo_private unsigned long
 389 _cairo_hash_bytes (unsigned long hash,
 390                    const void *bytes,
 391                    unsigned int length);
 392
 393 #define _cairo_scaled_glyph_index(g) ((g)->hash_entry.hash)
 394 #define _cairo_scaled_glyph_set_index(g, i)  ((g)->hash_entry.hash = (i))
 395
 396 #include "cairo-scaled-font-private.h"
 397
 398 struct _cairo_font_face {
 399     /* hash_entry must be first */
 400     cairo_hash_entry_t hash_entry;
 401     cairo_status_t status;
 402     cairo_reference_count_t ref_count;
 403     cairo_user_data_array_t user_data;
 404     const cairo_font_face_backend_t *backend;
 405 };
 406
 407 cairo_private void
 408 _cairo_default_context_reset_static_data (void);
 409
 410 cairo_private void
 411 _cairo_toy_font_face_reset_static_data (void);
 412
 413 cairo_private void
 414 _cairo_ft_font_reset_static_data (void);
 415
 416 cairo_private void
 417 _cairo_win32_font_reset_static_data (void);
 418
 419 #if CAIRO_HAS_COGL_SURFACE
 420 void
 421 _cairo_cogl_context_reset_static_data (void);
 422 #endif
 423
 424 /* the font backend interface */
 425
 426 struct _cairo_unscaled_font_backend {
 427     void (*destroy)                 (void                            *unscaled_font);
 428 };
 429
 430 /* #cairo_toy_font_face_t - simple family/slant/weight font faces used for
 431  * the built-in font API
 432  */
 433
 434 typedef struct _cairo_toy_font_face {
 435     cairo_font_face_t base;
 436     const char *family;
 437     cairo_bool_t owns_family;
 438     cairo_font_slant_t slant;
 439     cairo_font_weight_t weight;
 440
 441     cairo_font_face_t *impl_face; /* The non-toy font face this actually uses */
 442 } cairo_toy_font_face_t;
 443
 444 typedef enum _cairo_scaled_glyph_info {
 445     CAIRO_SCALED_GLYPH_INFO_METRICS      = (1 << 0),
 446     CAIRO_SCALED_GLYPH_INFO_SURFACE      = (1 << 1),
 447     CAIRO_SCALED_GLYPH_INFO_PATH         = (1 << 2),
 448     CAIRO_SCALED_GLYPH_INFO_RECORDING_SURFACE = (1 << 3)
 449 } cairo_scaled_glyph_info_t;
 450
 451 typedef struct _cairo_scaled_font_subset {
 452     cairo_scaled_font_t *scaled_font;
 453     unsigned int font_id;
 454     unsigned int subset_id;
 455
 456     /* Index of glyphs array is subset_glyph_index.
 457      * Value of glyphs array is scaled_font_glyph_index.
 458      */
 459     unsigned long *glyphs;
 460     char          **utf8;
 461     char          **glyph_names;
 462     int           *to_latin_char;
 463     unsigned long *latin_to_subset_glyph_index;
 464     unsigned int num_glyphs;
 465     cairo_bool_t is_composite;
 466     cairo_bool_t is_scaled;
 467     cairo_bool_t is_latin;
 468 } cairo_scaled_font_subset_t;
 469
 470 struct _cairo_scaled_font_backend {
 471     cairo_font_type_t type;
 472
 473     void
 474     (*fini)             (void                   *scaled_font);
 475
 476     cairo_warn cairo_int_status_t
 477     (*scaled_glyph_init)        (void                        *scaled_font,
 478                                  cairo_scaled_glyph_t        *scaled_glyph,
 479                                  cairo_scaled_glyph_info_t    info);
 480
 481     /* A backend only needs to implement this or ucs4_to_index(), not
 482      * both. This allows the backend to do something more sophisticated
 483      * then just converting characters one by one.
 484      */
 485     cairo_warn cairo_int_status_t
 486     (*text_to_glyphs) (void                       *scaled_font,
 487                        double                      x,
 488                        double                      y,
 489                        const char                 *utf8,
 490                        int                         utf8_len,
 491                        cairo_glyph_t             **glyphs,
 492                        int                        *num_glyphs,
 493                        cairo_text_cluster_t      **clusters,
 494                        int                        *num_clusters,
 495                        cairo_text_cluster_flags_t *cluster_flags);
 496
 497     unsigned long
 498     (*ucs4_to_index)            (void                        *scaled_font,
 499                                  uint32_t                     ucs4);
 500
 501     /* Read data from a sfnt font table.
 502      * @scaled_font: font
 503      * @tag: 4 byte table name specifying the table to read.
 504      * @offset: offset into the table
 505      * @buffer: buffer to write data into. Caller must ensure there is sufficient space.
 506      *          If NULL, return the size of the table in @length.
 507      * @length: If @buffer is NULL, the size of the table will be returned in @length.
 508      *          If @buffer is not null, @length specifies the number of bytes to read.
 509      *
 510      * If less than @length bytes are available to read this function
 511      * returns CAIRO_INT_STATUS_UNSUPPORTED. Note that requesting more
 512      * bytes than are available in the table may continue reading data
 513      * from the following table and return success. If this is
 514      * undesirable the caller should first query the table size. If an
 515      * error occurs the output value of @length is undefined.
 516      *
 517      * Returns CAIRO_INT_STATUS_UNSUPPORTED if not a sfnt style font or table not found.
 518      */
 519     cairo_warn cairo_int_status_t
 520     (*load_truetype_table)(void                 *scaled_font,
 521                            unsigned long         tag,
 522                            long                  offset,
 523                            unsigned char        *buffer,
 524                            unsigned long        *length);
 525
 526     /* ucs4 is set to -1 if the unicode character could not be found
 527      * for the glyph */
 528     cairo_warn cairo_int_status_t
 529     (*index_to_ucs4)(void                       *scaled_font,
 530                      unsigned long               index,
 531                      uint32_t                   *ucs4);
 532
 533     cairo_warn cairo_bool_t
 534     (*is_synthetic)(void                       *scaled_font);
 535
 536     /* For type 1 fonts, return the glyph name for a given glyph index.
 537      * A glyph index and list of glyph names in the Type 1 fonts is provided.
 538      * The function returns the index of the glyph in the list of glyph names.
 539      * @scaled_font: font
 540      * @glyph_names: the names of each glyph in the Type 1 font in the
 541      *   order they appear in the CharStrings array
 542      * @num_glyph_names: the number of names in the glyph_names array
 543      * @glyph_index: the given glyph index
 544      * @glyph_array_index: (index into glyph_names) the glyph name corresponding
 545      *  to the glyph_index
 546      */
 547
 548     cairo_warn cairo_int_status_t
 549     (*index_to_glyph_name)(void                 *scaled_font,
 550                            char                **glyph_names,
 551                            int                   num_glyph_names,
 552                            unsigned long         glyph_index,
 553                            unsigned long        *glyph_array_index);
 554
 555     /* Read data from a PostScript font.
 556      * @scaled_font: font
 557      * @offset: offset into the table
 558      * @buffer: buffer to write data into. Caller must ensure there is sufficient space.
 559      *          If NULL, return the size of the table in @length.
 560      * @length: If @buffer is NULL, the size of the table will be returned in @length.
 561      *          If @buffer is not null, @length specifies the number of bytes to read.
 562      *
 563      * If less than @length bytes are available to read this function
 564      * returns CAIRO_INT_STATUS_UNSUPPORTED. If an error occurs the
 565      * output value of @length is undefined.
 566      *
 567      * Returns CAIRO_INT_STATUS_UNSUPPORTED if not a Type 1 font.
 568      */
 569     cairo_warn cairo_int_status_t
 570     (*load_type1_data)    (void                 *scaled_font,
 571                            long                  offset,
 572                            unsigned char        *buffer,
 573                            unsigned long        *length);
 574 };
 575
 576 struct _cairo_font_face_backend {
 577     cairo_font_type_t   type;
 578
 579     cairo_warn cairo_status_t
 580     (*create_for_toy)  (cairo_toy_font_face_t   *toy_face,
 581                         cairo_font_face_t      **font_face);
 582
 583     /* The destroy() function is allowed to resurrect the font face
 584      * by re-referencing. This is needed for the FreeType backend.
 585      */
 586     void
 587     (*destroy)     (void                        *font_face);
 588
 589     cairo_warn cairo_status_t
 590     (*scaled_font_create) (void                         *font_face,
 591                            const cairo_matrix_t         *font_matrix,
 592                            const cairo_matrix_t         *ctm,
 593                            const cairo_font_options_t   *options,
 594                            cairo_scaled_font_t         **scaled_font);
 595
 596     cairo_font_face_t *
 597     (*get_implementation) (void                         *font_face,
 598                            const cairo_matrix_t         *font_matrix,
 599                            const cairo_matrix_t         *ctm,
 600                            const cairo_font_options_t   *options);
 601 };
 602
 603 extern const cairo_private struct _cairo_font_face_backend _cairo_user_font_face_backend;
 604
 605 /* concrete font backends */
 606 #if CAIRO_HAS_FT_FONT
 607
 608 extern const cairo_private struct _cairo_font_face_backend _cairo_ft_font_face_backend;
 609
 610 #endif
 611
 612 #if CAIRO_HAS_WIN32_FONT
 613
 614 extern const cairo_private struct _cairo_font_face_backend _cairo_win32_font_face_backend;
 615
 616 #endif
 617
 618 #if CAIRO_HAS_QUARTZ_FONT
 619
 620 extern const cairo_private struct _cairo_font_face_backend _cairo_quartz_font_face_backend;
 621
 622 #endif
 623
 624 #define CAIRO_EXTEND_SURFACE_DEFAULT CAIRO_EXTEND_NONE
 625 #define CAIRO_EXTEND_GRADIENT_DEFAULT CAIRO_EXTEND_PAD
 626 #define CAIRO_FILTER_DEFAULT CAIRO_FILTER_GOOD
 627
 628 extern const cairo_private cairo_solid_pattern_t _cairo_pattern_clear;
 629 extern const cairo_private cairo_solid_pattern_t _cairo_pattern_black;
 630 extern const cairo_private cairo_solid_pattern_t _cairo_pattern_white;
 631
 632 struct _cairo_surface_attributes {
 633     cairo_matrix_t matrix;
 634     cairo_extend_t extend;
 635     cairo_filter_t filter;
 636     cairo_bool_t has_component_alpha;
 637     int            x_offset;
 638     int            y_offset;
 639     void           *extra;
 640 };
 641
 642 #define CAIRO_FONT_SLANT_DEFAULT   CAIRO_FONT_SLANT_NORMAL
 643 #define CAIRO_FONT_WEIGHT_DEFAULT  CAIRO_FONT_WEIGHT_NORMAL
 644
 645 #define CAIRO_WIN32_FONT_FAMILY_DEFAULT "Arial"
 646 #define CAIRO_QUARTZ_FONT_FAMILY_DEFAULT  "Helvetica"
 647 #define CAIRO_FT_FONT_FAMILY_DEFAULT     ""
 648 #define CAIRO_USER_FONT_FAMILY_DEFAULT     "@cairo:"
 649
 650 #if   CAIRO_HAS_WIN32_FONT
 651
 652 #define CAIRO_FONT_FAMILY_DEFAULT CAIRO_WIN32_FONT_FAMILY_DEFAULT
 653 #define CAIRO_FONT_FACE_BACKEND_DEFAULT &_cairo_win32_font_face_backend
 654
 655 #elif CAIRO_HAS_QUARTZ_FONT
 656
 657 #define CAIRO_FONT_FAMILY_DEFAULT CAIRO_QUARTZ_FONT_FAMILY_DEFAULT
 658 #define CAIRO_FONT_FACE_BACKEND_DEFAULT &_cairo_quartz_font_face_backend
 659
 660 #elif CAIRO_HAS_FT_FONT
 661
 662 #define CAIRO_FONT_FAMILY_DEFAULT CAIRO_FT_FONT_FAMILY_DEFAULT
 663 #define CAIRO_FONT_FACE_BACKEND_DEFAULT &_cairo_ft_font_face_backend
 664
 665 #else
 666
 667 #define CAIRO_FONT_FAMILY_DEFAULT CAIRO_FT_FONT_FAMILY_DEFAULT
 668 #define CAIRO_FONT_FACE_BACKEND_DEFAULT &_cairo_user_font_face_backend
 669
 670 #endif
 671
 672 #define CAIRO_GSTATE_OPERATOR_DEFAULT   CAIRO_OPERATOR_OVER
 673 #define CAIRO_GSTATE_TOLERANCE_DEFAULT  0.1
 674 #define CAIRO_GSTATE_FILL_RULE_DEFAULT  CAIRO_FILL_RULE_WINDING
 675 #define CAIRO_GSTATE_LINE_WIDTH_DEFAULT 2.0
 676 #define CAIRO_GSTATE_LINE_CAP_DEFAULT   CAIRO_LINE_CAP_BUTT
 677 #define CAIRO_GSTATE_LINE_JOIN_DEFAULT  CAIRO_LINE_JOIN_MITER
 678 #define CAIRO_GSTATE_MITER_LIMIT_DEFAULT        10.0
 679 #define CAIRO_GSTATE_DEFAULT_FONT_SIZE  10.0
 680
 681 #define CAIRO_SURFACE_RESOLUTION_DEFAULT 72.0
 682 #define CAIRO_SURFACE_FALLBACK_RESOLUTION_DEFAULT 300.0
 683
 684 typedef struct _cairo_stroke_face {
 685     cairo_point_t ccw;
 686     cairo_point_t point;
 687     cairo_point_t cw;
 688     cairo_slope_t dev_vector;
 689     cairo_point_double_t dev_slope;
 690     cairo_point_double_t usr_vector;
 691     double length;
 692 } cairo_stroke_face_t;
 693
 694 /* cairo.c */
 695
 696 static inline double cairo_const
 697 _cairo_restrict_value (double value, double min, double max)
 698 {
 699     if (value < min)
 700         return min;
 701     else if (value > max)
 702         return max;
 703     else
 704         return value;
 705 }
 706
 707 /* C99 round() rounds to the nearest integral value with halfway cases rounded
 708  * away from 0. _cairo_round rounds halfway cases toward positive infinity.
 709  * This matches the rounding behaviour of _cairo_lround. */
 710 static inline double cairo_const
 711 _cairo_round (double r)
 712 {
 713     return floor (r + .5);
 714 }
 715
 716 #if DISABLE_SOME_FLOATING_POINT
 717 cairo_private int
 718 _cairo_lround (double d) cairo_const;
 719 #else
 720 static inline int cairo_const
 721 _cairo_lround (double r)
 722 {
 723     return _cairo_round (r);
 724 }
 725 #endif
 726
 727 cairo_private uint16_t
 728 _cairo_half_from_float (float f) cairo_const;
 729
 730 cairo_private cairo_bool_t
 731 _cairo_operator_bounded_by_mask (cairo_operator_t op) cairo_const;
 732
 733 cairo_private cairo_bool_t
 734 _cairo_operator_bounded_by_source (cairo_operator_t op) cairo_const;
 735
 736 enum {
 737     CAIRO_OPERATOR_BOUND_BY_MASK = 1 << 1,
 738     CAIRO_OPERATOR_BOUND_BY_SOURCE = 1 << 2,
 739 };
 740
 741 cairo_private uint32_t
 742 _cairo_operator_bounded_by_either (cairo_operator_t op) cairo_const;
 743 /* cairo-color.c */
 744 cairo_private const cairo_color_t *
 745 _cairo_stock_color (cairo_stock_t stock) cairo_pure;
 746
 747 #define CAIRO_COLOR_WHITE       _cairo_stock_color (CAIRO_STOCK_WHITE)
 748 #define CAIRO_COLOR_BLACK       _cairo_stock_color (CAIRO_STOCK_BLACK)
 749 #define CAIRO_COLOR_TRANSPARENT _cairo_stock_color (CAIRO_STOCK_TRANSPARENT)
 750
 751 cairo_private uint16_t
 752 _cairo_color_double_to_short (double d) cairo_const;
 753
 754 cairo_private void
 755 _cairo_color_init_rgba (cairo_color_t *color,
 756                         double red, double green, double blue,
 757                         double alpha);
 758
 759 cairo_private void
 760 _cairo_color_multiply_alpha (cairo_color_t *color,
 761                              double         alpha);
 762
 763 cairo_private void
 764 _cairo_color_get_rgba (cairo_color_t *color,
 765                        double        *red,
 766                        double        *green,
 767                        double        *blue,
 768                        double        *alpha);
 769
 770 cairo_private void
 771 _cairo_color_get_rgba_premultiplied (cairo_color_t *color,
 772                                      double        *red,
 773                                      double        *green,
 774                                      double        *blue,
 775                                      double        *alpha);
 776
 777 cairo_private cairo_bool_t
 778 _cairo_color_equal (const cairo_color_t *color_a,
 779                     const cairo_color_t *color_b) cairo_pure;
 780
 781 cairo_private cairo_bool_t
 782 _cairo_color_stop_equal (const cairo_color_stop_t *color_a,
 783                          const cairo_color_stop_t *color_b) cairo_pure;
 784
 785 cairo_private cairo_content_t
 786 _cairo_color_get_content (const cairo_color_t *color) cairo_pure;
 787
 788 /* cairo-font-face.c */
 789
 790 extern const cairo_private cairo_font_face_t _cairo_font_face_nil;
 791
 792 cairo_private void
 793 _cairo_font_face_init (cairo_font_face_t               *font_face,
 794                        const cairo_font_face_backend_t *backend);
 795
 796 cairo_private cairo_status_t
 797 _cairo_font_face_set_error (cairo_font_face_t *font_face,
 798                             cairo_status_t     status);
 799
 800 cairo_private void
 801 _cairo_unscaled_font_init (cairo_unscaled_font_t               *font,
 802                            const cairo_unscaled_font_backend_t *backend);
 803
 804 cairo_private_no_warn cairo_unscaled_font_t *
 805 _cairo_unscaled_font_reference (cairo_unscaled_font_t *font);
 806
 807 cairo_private void
 808 _cairo_unscaled_font_destroy (cairo_unscaled_font_t *font);
 809
 810 /* cairo-font-face-twin.c */
 811
 812 cairo_private cairo_font_face_t *
 813 _cairo_font_face_twin_create_fallback (void);
 814
 815 cairo_private cairo_status_t
 816 _cairo_font_face_twin_create_for_toy (cairo_toy_font_face_t   *toy_face,
 817                                       cairo_font_face_t      **font_face);
 818
 819 /* cairo-font-face-twin-data.c */
 820
 821 extern const cairo_private int8_t _cairo_twin_outlines[];
 822 extern const cairo_private uint16_t _cairo_twin_charmap[128];
 823
 824 /* cairo-font-options.c */
 825
 826 cairo_private void
 827 _cairo_font_options_init_default (cairo_font_options_t *options);
 828
 829 cairo_private void
 830 _cairo_font_options_init_copy (cairo_font_options_t             *options,
 831                                const cairo_font_options_t       *other);
 832
 833 cairo_private void
 834 _cairo_font_options_set_lcd_filter (cairo_font_options_t   *options,
 835                                    cairo_lcd_filter_t  lcd_filter);
 836
 837 cairo_private cairo_lcd_filter_t
 838 _cairo_font_options_get_lcd_filter (const cairo_font_options_t *options);
 839
 840 cairo_private void
 841 _cairo_font_options_set_round_glyph_positions (cairo_font_options_t   *options,
 842                                                cairo_round_glyph_positions_t  round);
 843
 844 cairo_private cairo_round_glyph_positions_t
 845 _cairo_font_options_get_round_glyph_positions (const cairo_font_options_t *options);
 846
 847 /* cairo-hull.c */
 848 cairo_private cairo_status_t
 849 _cairo_hull_compute (cairo_pen_vertex_t *vertices, int *num_vertices);
 850
 851 /* cairo-lzw.c */
 852 cairo_private unsigned char *
 853 _cairo_lzw_compress (unsigned char *data, unsigned long *size_in_out);
 854
 855 /* cairo-misc.c */
 856 cairo_private cairo_status_t
 857 _cairo_validate_text_clusters (const char                  *utf8,
 858                                int                          utf8_len,
 859                                const cairo_glyph_t         *glyphs,
 860                                int                          num_glyphs,
 861                                const cairo_text_cluster_t  *clusters,
 862                                int                          num_clusters,
 863                                cairo_text_cluster_flags_t   cluster_flags);
 864
 865 cairo_private cairo_status_t
 866 _cairo_intern_string (const char **str_inout, int len);
 867
 868 cairo_private void
 869 _cairo_intern_string_reset_static_data (void);
 870
 871 /* cairo-path-fixed.c */
 872 cairo_private cairo_path_fixed_t *
 873 _cairo_path_fixed_create (void);
 874
 875 cairo_private void
 876 _cairo_path_fixed_init (cairo_path_fixed_t *path);
 877
 878 cairo_private cairo_status_t
 879 _cairo_path_fixed_init_copy (cairo_path_fixed_t *path,
 880                              const cairo_path_fixed_t *other);
 881
 882 cairo_private void
 883 _cairo_path_fixed_fini (cairo_path_fixed_t *path);
 884
 885 cairo_private void
 886 _cairo_path_fixed_destroy (cairo_path_fixed_t *path);
 887
 888 cairo_private cairo_status_t
 889 _cairo_path_fixed_move_to (cairo_path_fixed_t  *path,
 890                            cairo_fixed_t        x,
 891                            cairo_fixed_t        y);
 892
 893 cairo_private void
 894 _cairo_path_fixed_new_sub_path (cairo_path_fixed_t *path);
 895
 896 cairo_private cairo_status_t
 897 _cairo_path_fixed_rel_move_to (cairo_path_fixed_t *path,
 898                                cairo_fixed_t       dx,
 899                                cairo_fixed_t       dy);
 900
 901 cairo_private cairo_status_t
 902 _cairo_path_fixed_line_to (cairo_path_fixed_t *path,
 903                            cairo_fixed_t        x,
 904                            cairo_fixed_t        y);
 905
 906 cairo_private cairo_status_t
 907 _cairo_path_fixed_rel_line_to (cairo_path_fixed_t *path,
 908                                cairo_fixed_t       dx,
 909                                cairo_fixed_t       dy);
 910
 911 cairo_private cairo_status_t
 912 _cairo_path_fixed_curve_to (cairo_path_fixed_t  *path,
 913                             cairo_fixed_t x0, cairo_fixed_t y0,
 914                             cairo_fixed_t x1, cairo_fixed_t y1,
 915                             cairo_fixed_t x2, cairo_fixed_t y2);
 916
 917 cairo_private cairo_status_t
 918 _cairo_path_fixed_rel_curve_to (cairo_path_fixed_t *path,
 919                                 cairo_fixed_t dx0, cairo_fixed_t dy0,
 920                                 cairo_fixed_t dx1, cairo_fixed_t dy1,
 921                                 cairo_fixed_t dx2, cairo_fixed_t dy2);
 922
 923 cairo_private cairo_status_t
 924 _cairo_path_fixed_close_path (cairo_path_fixed_t *path);
 925
 926 cairo_private cairo_bool_t
 927 _cairo_path_fixed_get_current_point (cairo_path_fixed_t *path,
 928                                      cairo_fixed_t      *x,
 929                                      cairo_fixed_t      *y);
 930
 931 typedef cairo_status_t
 932 (cairo_path_fixed_move_to_func_t) (void          *closure,
 933                                    const cairo_point_t *point);
 934
 935 typedef cairo_status_t
 936 (cairo_path_fixed_line_to_func_t) (void          *closure,
 937                                    const cairo_point_t *point);
 938
 939 typedef cairo_status_t
 940 (cairo_path_fixed_curve_to_func_t) (void          *closure,
 941                                     const cairo_point_t *p0,
 942                                     const cairo_point_t *p1,
 943                                     const cairo_point_t *p2);
 944
 945 typedef cairo_status_t
 946 (cairo_path_fixed_close_path_func_t) (void *closure);
 947
 948 cairo_private cairo_status_t
 949 _cairo_path_fixed_interpret (const cairo_path_fixed_t     *path,
 950                        cairo_path_fixed_move_to_func_t    *move_to,
 951                        cairo_path_fixed_line_to_func_t    *line_to,
 952                        cairo_path_fixed_curve_to_func_t   *curve_to,
 953                        cairo_path_fixed_close_path_func_t *close_path,
 954                        void                               *closure);
 955
 956 cairo_private cairo_status_t
 957 _cairo_path_fixed_interpret_flat (const cairo_path_fixed_t *path,
 958                        cairo_path_fixed_move_to_func_t    *move_to,
 959                        cairo_path_fixed_line_to_func_t    *line_to,
 960                        cairo_path_fixed_close_path_func_t *close_path,
 961                        void                               *closure,
 962                        double                             tolerance);
 963
 964
 965 cairo_private cairo_bool_t
 966 _cairo_path_bounder_extents (const cairo_path_fixed_t *path,
 967                              cairo_box_t *box);
 968
 969 cairo_private cairo_bool_t
 970 _cairo_path_fixed_extents (const cairo_path_fixed_t *path,
 971                            cairo_box_t *box);
 972
 973 cairo_private void
 974 _cairo_path_fixed_approximate_clip_extents (const cairo_path_fixed_t    *path,
 975                                             cairo_rectangle_int_t *extents);
 976
 977 cairo_private void
 978 _cairo_path_fixed_approximate_fill_extents (const cairo_path_fixed_t *path,
 979                                             cairo_rectangle_int_t *extents);
 980
 981 cairo_private void
 982 _cairo_path_fixed_fill_extents (const cairo_path_fixed_t        *path,
 983                                 cairo_fill_rule_t        fill_rule,
 984                                 double                   tolerance,
 985                                 cairo_rectangle_int_t   *extents);
 986
 987 cairo_private void
 988 _cairo_path_fixed_approximate_stroke_extents (const cairo_path_fixed_t *path,
 989                                               const cairo_stroke_style_t *style,
 990                                               const cairo_matrix_t *ctm,
 991                                               cairo_rectangle_int_t *extents);
 992
 993 cairo_private cairo_status_t
 994 _cairo_path_fixed_stroke_extents (const cairo_path_fixed_t *path,
 995                                   const cairo_stroke_style_t *style,
 996                                   const cairo_matrix_t *ctm,
 997                                   const cairo_matrix_t *ctm_inverse,
 998                                   double tolerance,
 999                                   cairo_rectangle_int_t *extents);
1000
1001 cairo_private void
1002 _cairo_path_fixed_transform (cairo_path_fixed_t *path,
1003                              const cairo_matrix_t       *matrix);
1004
1005 cairo_private cairo_bool_t
1006 _cairo_path_fixed_is_single_arc (const cairo_path_fixed_t *path);
1007
1008 cairo_private cairo_bool_t
1009 _cairo_path_fixed_is_single_line (const cairo_path_fixed_t *path);
1010
1011 cairo_private cairo_bool_t
1012 _cairo_path_fixed_is_box (const cairo_path_fixed_t *path,
1013                           cairo_box_t *box);
1014
1015 cairo_private cairo_bool_t
1016 _cairo_path_fixed_is_rectangle (const cairo_path_fixed_t *path,
1017                                 cairo_box_t        *box);
1018
1019 /* cairo-path-in-fill.c */
1020 cairo_private cairo_bool_t
1021 _cairo_path_fixed_in_fill (const cairo_path_fixed_t     *path,
1022                            cairo_fill_rule_t     fill_rule,
1023                            double                tolerance,
1024                            double                x,
1025                            double                y);
1026
1027 /* cairo-path-fill.c */
1028 cairo_private cairo_status_t
1029 _cairo_path_fixed_fill_to_polygon (const cairo_path_fixed_t *path,
1030                                    double              tolerance,
1031                                    cairo_polygon_t      *polygon);
1032
1033 cairo_private cairo_status_t
1034 _cairo_path_fixed_fill_rectilinear_to_polygon (const cairo_path_fixed_t *path,
1035                                                cairo_antialias_t antialias,
1036                                                cairo_polygon_t *polygon);
1037
1038 cairo_private cairo_status_t
1039 _cairo_path_fixed_fill_rectilinear_to_boxes (const cairo_path_fixed_t *path,
1040                                              cairo_fill_rule_t fill_rule,
1041                                              cairo_antialias_t antialias,
1042                                              cairo_boxes_t *boxes);
1043
1044 cairo_private cairo_region_t *
1045 _cairo_path_fixed_fill_rectilinear_to_region (const cairo_path_fixed_t  *path,
1046                                               cairo_fill_rule_t  fill_rule,
1047                                               const cairo_rectangle_int_t *extents);
1048
1049 cairo_private cairo_status_t
1050 _cairo_path_fixed_fill_to_traps (const cairo_path_fixed_t   *path,
1051                                  cairo_fill_rule_t           fill_rule,
1052                                  double                      tolerance,
1053                                  cairo_traps_t              *traps);
1054
1055 cairo_private cairo_status_t
1056 _cairo_path_fixed_fill_rectilinear_to_traps (const cairo_path_fixed_t *path,
1057                                              cairo_fill_rule_t        fill_rule,
1058                                              cairo_antialias_t        antialias,
1059                                              cairo_traps_t                *traps);
1060
1061 /* cairo-path-stroke.c */
1062 cairo_private cairo_status_t
1063 _cairo_path_fixed_stroke_to_polygon (const cairo_path_fixed_t   *path,
1064                                      const cairo_stroke_style_t *stroke_style,
1065                                      const cairo_matrix_t       *ctm,
1066                                      const cairo_matrix_t       *ctm_inverse,
1067                                      double              tolerance,
1068                                      cairo_polygon_t    *polygon);
1069
1070 cairo_private cairo_int_status_t
1071 _cairo_path_fixed_stroke_to_tristrip (const cairo_path_fixed_t  *path,
1072                                       const cairo_stroke_style_t*style,
1073                                       const cairo_matrix_t      *ctm,
1074                                       const cairo_matrix_t      *ctm_inverse,
1075                                       double                     tolerance,
1076                                       cairo_tristrip_t           *strip);
1077
1078 cairo_private cairo_status_t
1079 _cairo_path_fixed_stroke_dashed_to_polygon (const cairo_path_fixed_t    *path,
1080                                             const cairo_stroke_style_t  *stroke_style,
1081                                             const cairo_matrix_t        *ctm,
1082                                             const cairo_matrix_t        *ctm_inverse,
1083                                             double               tolerance,
1084                                             cairo_polygon_t     *polygon);
1085
1086 cairo_private cairo_int_status_t
1087 _cairo_path_fixed_stroke_rectilinear_to_boxes (const cairo_path_fixed_t *path,
1088                                                const cairo_stroke_style_t       *stroke_style,
1089                                                const cairo_matrix_t     *ctm,
1090                                                cairo_antialias_t         antialias,
1091                                                cairo_boxes_t            *boxes);
1092
1093 cairo_private cairo_int_status_t
1094 _cairo_path_fixed_stroke_to_traps (const cairo_path_fixed_t     *path,
1095                                    const cairo_stroke_style_t   *stroke_style,
1096                                    const cairo_matrix_t *ctm,
1097                                    const cairo_matrix_t *ctm_inverse,
1098                                    double                tolerance,
1099                                    cairo_traps_t        *traps);
1100
1101 cairo_private cairo_status_t
1102 _cairo_path_fixed_stroke_to_shaper (cairo_path_fixed_t  *path,
1103                                    const cairo_stroke_style_t   *stroke_style,
1104                                    const cairo_matrix_t *ctm,
1105                                    const cairo_matrix_t *ctm_inverse,
1106                                    double                tolerance,
1107                                    cairo_status_t (*add_triangle) (void *closure,
1108                                                                    const cairo_point_t triangle[3]),
1109                                    cairo_status_t (*add_triangle_fan) (void *closure,
1110                                                                        const cairo_point_t *midpt,
1111                                                                        const cairo_point_t *points,
1112                                                                        int npoints),
1113                                    cairo_status_t (*add_quad) (void *closure,
1114                                                                const cairo_point_t quad[4]),
1115                                    void *closure);
1116
1117 /* cairo-scaled-font.c */
1118
1119 cairo_private void
1120 _cairo_scaled_font_freeze_cache (cairo_scaled_font_t *scaled_font);
1121
1122 cairo_private void
1123 _cairo_scaled_font_thaw_cache (cairo_scaled_font_t *scaled_font);
1124
1125 cairo_private void
1126 _cairo_scaled_font_reset_cache (cairo_scaled_font_t *scaled_font);
1127
1128 cairo_private cairo_status_t
1129 _cairo_scaled_font_set_error (cairo_scaled_font_t *scaled_font,
1130                               cairo_status_t status);
1131
1132 cairo_private cairo_scaled_font_t *
1133 _cairo_scaled_font_create_in_error (cairo_status_t status);
1134
1135 cairo_private void
1136 _cairo_scaled_font_reset_static_data (void);
1137
1138 cairo_private cairo_status_t
1139 _cairo_scaled_font_register_placeholder_and_unlock_font_map (cairo_scaled_font_t *scaled_font);
1140
1141 cairo_private void
1142 _cairo_scaled_font_unregister_placeholder_and_lock_font_map (cairo_scaled_font_t *scaled_font);
1143
1144 cairo_private cairo_status_t
1145 _cairo_scaled_font_init (cairo_scaled_font_t               *scaled_font,
1146                          cairo_font_face_t                 *font_face,
1147                          const cairo_matrix_t              *font_matrix,
1148                          const cairo_matrix_t              *ctm,
1149                          const cairo_font_options_t        *options,
1150                          const cairo_scaled_font_backend_t *backend);
1151
1152 cairo_private cairo_status_t
1153 _cairo_scaled_font_set_metrics (cairo_scaled_font_t         *scaled_font,
1154                                 cairo_font_extents_t        *fs_metrics);
1155
1156 /* This should only be called on an error path by a scaled_font constructor */
1157 cairo_private void
1158 _cairo_scaled_font_fini (cairo_scaled_font_t *scaled_font);
1159
1160 cairo_private cairo_status_t
1161 _cairo_scaled_font_font_extents (cairo_scaled_font_t  *scaled_font,
1162                                  cairo_font_extents_t *extents);
1163
1164 cairo_private cairo_status_t
1165 _cairo_scaled_font_glyph_device_extents (cairo_scaled_font_t     *scaled_font,
1166                                          const cairo_glyph_t     *glyphs,
1167                                          int                      num_glyphs,
1168                                          cairo_rectangle_int_t   *extents,
1169                                          cairo_bool_t            *overlap);
1170
1171 cairo_private cairo_bool_t
1172 _cairo_scaled_font_glyph_approximate_extents (cairo_scaled_font_t        *scaled_font,
1173                                               const cairo_glyph_t        *glyphs,
1174                                               int                      num_glyphs,
1175                                               cairo_rectangle_int_t   *extents);
1176
1177 cairo_private cairo_status_t
1178 _cairo_scaled_font_show_glyphs (cairo_scaled_font_t *scaled_font,
1179                                 cairo_operator_t     op,
1180                                 const cairo_pattern_t *source,
1181                                 cairo_surface_t     *surface,
1182                                 int                  source_x,
1183                                 int                  source_y,
1184                                 int                  dest_x,
1185                                 int                  dest_y,
1186                                 unsigned int         width,
1187                                 unsigned int         height,
1188                                 cairo_glyph_t       *glyphs,
1189                                 int                  num_glyphs,
1190                                 cairo_region_t      *clip_region);
1191
1192 cairo_private cairo_status_t
1193 _cairo_scaled_font_glyph_path (cairo_scaled_font_t *scaled_font,
1194                                const cairo_glyph_t *glyphs,
1195                                int                  num_glyphs,
1196                                cairo_path_fixed_t  *path);
1197
1198 cairo_private void
1199 _cairo_scaled_glyph_set_metrics (cairo_scaled_glyph_t *scaled_glyph,
1200                                  cairo_scaled_font_t *scaled_font,
1201                                  cairo_text_extents_t *fs_metrics);
1202
1203 cairo_private void
1204 _cairo_scaled_glyph_set_surface (cairo_scaled_glyph_t *scaled_glyph,
1205                                  cairo_scaled_font_t *scaled_font,
1206                                  cairo_image_surface_t *surface);
1207
1208 cairo_private void
1209 _cairo_scaled_glyph_set_path (cairo_scaled_glyph_t *scaled_glyph,
1210                               cairo_scaled_font_t *scaled_font,
1211                               cairo_path_fixed_t *path);
1212
1213 cairo_private void
1214 _cairo_scaled_glyph_set_recording_surface (cairo_scaled_glyph_t *scaled_glyph,
1215                                            cairo_scaled_font_t *scaled_font,
1216                                            cairo_surface_t *recording_surface);
1217
1218 cairo_private cairo_int_status_t
1219 _cairo_scaled_glyph_lookup (cairo_scaled_font_t *scaled_font,
1220                             unsigned long index,
1221                             cairo_scaled_glyph_info_t info,
1222                             cairo_scaled_glyph_t **scaled_glyph_ret);
1223
1224 cairo_private double
1225 _cairo_scaled_font_get_max_scale (cairo_scaled_font_t *scaled_font);
1226
1227 cairo_private void
1228 _cairo_scaled_font_map_destroy (void);
1229
1230 /* cairo-stroke-style.c */
1231
1232 cairo_private void
1233 _cairo_stroke_style_init (cairo_stroke_style_t *style);
1234
1235 cairo_private cairo_status_t
1236 _cairo_stroke_style_init_copy (cairo_stroke_style_t *style,
1237                                const cairo_stroke_style_t *other);
1238
1239 cairo_private void
1240 _cairo_stroke_style_fini (cairo_stroke_style_t *style);
1241
1242 cairo_private void
1243 _cairo_stroke_style_max_distance_from_path (const cairo_stroke_style_t *style,
1244                                             const cairo_path_fixed_t *path,
1245                                             const cairo_matrix_t *ctm,
1246                                             double *dx, double *dy);
1247
1248 cairo_private double
1249 _cairo_stroke_style_dash_period (const cairo_stroke_style_t *style);
1250
1251 cairo_private double
1252 _cairo_stroke_style_dash_stroked (const cairo_stroke_style_t *style);
1253
1254 cairo_private cairo_bool_t
1255 _cairo_stroke_style_dash_can_approximate (const cairo_stroke_style_t *style,
1256                                           const cairo_matrix_t *ctm,
1257                                           double tolerance);
1258
1259 cairo_private void
1260 _cairo_stroke_style_dash_approximate (const cairo_stroke_style_t *style,
1261                                       const cairo_matrix_t *ctm,
1262                                       double tolerance,
1263                                       double *dash_offset,
1264                                       double *dashes,
1265                                       unsigned int *num_dashes);
1266
1267
1268 /* cairo-surface.c */
1269
1270 cairo_private cairo_status_t
1271 _cairo_surface_copy_mime_data (cairo_surface_t *dst,
1272                                cairo_surface_t *src);
1273
1274 cairo_private_no_warn cairo_int_status_t
1275 _cairo_surface_set_error (cairo_surface_t       *surface,
1276                           cairo_int_status_t     status);
1277
1278 cairo_private void
1279 _cairo_surface_set_resolution (cairo_surface_t *surface,
1280                                double x_res,
1281                                double y_res);
1282
1283 cairo_private cairo_surface_t *
1284 _cairo_surface_create_similar_scratch (cairo_surface_t *other,
1285                                        cairo_content_t  content,
1286                                        int              width,
1287                                        int              height);
1288
1289 cairo_private cairo_surface_t *
1290 _cairo_surface_create_for_rectangle_int (cairo_surface_t *target,
1291                                          const cairo_rectangle_int_t *extents);
1292
1293 cairo_private cairo_surface_t *
1294 _cairo_surface_create_similar_solid (cairo_surface_t        *other,
1295                                      cairo_content_t         content,
1296                                      int                     width,
1297                                      int                     height,
1298                                      const cairo_color_t    *color);
1299
1300 cairo_private void
1301 _cairo_surface_init (cairo_surface_t                    *surface,
1302                      const cairo_surface_backend_t      *backend,
1303                      cairo_device_t                     *device,
1304                      cairo_content_t                     content);
1305
1306 cairo_private void
1307 _cairo_surface_set_font_options (cairo_surface_t       *surface,
1308                                  cairo_font_options_t  *options);
1309
1310 cairo_private cairo_status_t
1311 _cairo_surface_paint (cairo_surface_t   *surface,
1312                       cairo_operator_t   op,
1313                       const cairo_pattern_t *source,
1314                       const cairo_clip_t            *clip);
1315
1316 cairo_private cairo_image_surface_t *
1317 _cairo_surface_map_to_image (cairo_surface_t  *surface,
1318                              const cairo_rectangle_int_t *extents);
1319
1320 cairo_private cairo_int_status_t
1321 _cairo_surface_unmap_image (cairo_surface_t       *surface,
1322                             cairo_image_surface_t *image);
1323
1324 cairo_private cairo_status_t
1325 _cairo_surface_mask (cairo_surface_t    *surface,
1326                      cairo_operator_t    op,
1327                      const cairo_pattern_t      *source,
1328                      const cairo_pattern_t      *mask,
1329                      const cairo_clip_t         *clip);
1330
1331 cairo_private cairo_status_t
1332 _cairo_surface_fill_stroke (cairo_surface_t         *surface,
1333                             cairo_operator_t         fill_op,
1334                             const cairo_pattern_t   *fill_source,
1335                             cairo_fill_rule_t        fill_rule,
1336                             double                   fill_tolerance,
1337                             cairo_antialias_t        fill_antialias,
1338                             cairo_path_fixed_t      *path,
1339                             cairo_operator_t         stroke_op,
1340                             const cairo_pattern_t   *stroke_source,
1341                             const cairo_stroke_style_t    *stroke_style,
1342                             const cairo_matrix_t            *stroke_ctm,
1343                             const cairo_matrix_t            *stroke_ctm_inverse,
1344                             double                   stroke_tolerance,
1345                             cairo_antialias_t        stroke_antialias,
1346                             const cairo_clip_t      *clip);
1347
1348 cairo_private cairo_status_t
1349 _cairo_surface_stroke (cairo_surface_t          *surface,
1350                        cairo_operator_t          op,
1351                        const cairo_pattern_t    *source,
1352                        const cairo_path_fixed_t *path,
1353                        const cairo_stroke_style_t       *style,
1354                        const cairo_matrix_t             *ctm,
1355                        const cairo_matrix_t             *ctm_inverse,
1356                        double                    tolerance,
1357                        cairo_antialias_t         antialias,
1358                        const cairo_clip_t               *clip);
1359
1360 cairo_private cairo_status_t
1361 _cairo_surface_fill (cairo_surface_t    *surface,
1362                      cairo_operator_t    op,
1363                      const cairo_pattern_t *source,
1364                      const cairo_path_fixed_t   *path,
1365                      cairo_fill_rule_t   fill_rule,
1366                      double              tolerance,
1367                      cairo_antialias_t   antialias,
1368                      const cairo_clip_t *clip);
1369
1370 cairo_private cairo_status_t
1371 _cairo_surface_show_text_glyphs (cairo_surface_t            *surface,
1372                                  cairo_operator_t            op,
1373                                  const cairo_pattern_t      *source,
1374                                  const char                 *utf8,
1375                                  int                         utf8_len,
1376                                  cairo_glyph_t              *glyphs,
1377                                  int                         num_glyphs,
1378                                  const cairo_text_cluster_t *clusters,
1379                                  int                         num_clusters,
1380                                  cairo_text_cluster_flags_t  cluster_flags,
1381                                  cairo_scaled_font_t        *scaled_font,
1382                                  const cairo_clip_t                 *clip);
1383
1384 cairo_private cairo_status_t
1385 _cairo_surface_acquire_source_image (cairo_surface_t         *surface,
1386                                      cairo_image_surface_t  **image_out,
1387                                      void                   **image_extra);
1388
1389 cairo_private void
1390 _cairo_surface_release_source_image (cairo_surface_t        *surface,
1391                                      cairo_image_surface_t  *image,
1392                                      void                   *image_extra);
1393
1394 cairo_private cairo_surface_t *
1395 _cairo_surface_snapshot (cairo_surface_t *surface);
1396
1397 cairo_private void
1398 _cairo_surface_attach_snapshot (cairo_surface_t *surface,
1399                                 cairo_surface_t *snapshot,
1400                                 cairo_surface_func_t detach_func);
1401
1402 cairo_private void
1403 _cairo_surface_attach_subsurface_snapshot (cairo_surface_t *surface,
1404                                            cairo_surface_subsurface_t *subsurface,
1405                                            cairo_surface_t *snapshot,
1406                                            cairo_surface_func_t detach_func);
1407
1408 cairo_private cairo_surface_t *
1409 _cairo_surface_has_snapshot (cairo_surface_t *surface,
1410                              const cairo_surface_backend_t *backend);
1411
1412 cairo_private void
1413 _cairo_surface_detach_snapshot (cairo_surface_t *snapshot);
1414
1415 cairo_private cairo_status_t
1416 _cairo_surface_begin_modification (cairo_surface_t *surface);
1417
1418 cairo_private_no_warn cairo_bool_t
1419 _cairo_surface_get_extents (cairo_surface_t         *surface,
1420                             cairo_rectangle_int_t   *extents);
1421
1422 cairo_private void
1423 _cairo_surface_set_device_scale (cairo_surface_t *surface,
1424                                  double           sx,
1425                                  double           sy);
1426
1427 cairo_private cairo_bool_t
1428 _cairo_surface_has_device_transform (cairo_surface_t *surface) cairo_pure;
1429
1430 cairo_private void
1431 _cairo_surface_release_device_reference (cairo_surface_t *surface);
1432
1433 /* cairo-image-surface.c */
1434
1435 /* XXX: In cairo 1.2.0 we added a new %CAIRO_FORMAT_RGB16_565 but
1436  * neglected to adjust this macro. The net effect is that it's
1437  * impossible to externally create an image surface with this
1438  * format. This is perhaps a good thing since we also neglected to fix
1439  * up things like cairo_surface_write_to_png() for the new format
1440  * (-Wswitch-enum will tell you where). Is it obvious that format was
1441  * added in haste?
1442  *
1443  * The reason for the new format was to allow the xlib backend to be
1444  * used on X servers with a 565 visual. So the new format did its job
1445  * for that, even without being considered "valid" for the sake of
1446  * things like cairo_image_surface_create().
1447  *
1448  * Since 1.2.0 we ran into the same situtation with X servers with BGR
1449  * visuals. This time we invented #cairo_internal_format_t instead,
1450  * (see it for more discussion).
1451  *
1452  * The punchline is that %CAIRO_FORMAT_VALID must not conside any
1453  * internal format to be valid. Also we need to decide if the
1454  * RGB16_565 should be moved to instead be an internal format. If so,
1455  * this macro need not change for it. (We probably will need to leave
1456  * an RGB16_565 value in the header files for the sake of code that
1457  * might have that value in it.)
1458  *
1459  * If we do decide to start fully supporting RGB16_565 as an external
1460  * format, then %CAIRO_FORMAT_VALID needs to be adjusted to include
1461  * it. But that should not happen before all necessary code is fixed
1462  * to support it (at least cairo_surface_write_to_png() and a few spots
1463  * in cairo-xlib-surface.c--again see -Wswitch-enum).
1464  */
1465 #define CAIRO_FORMAT_VALID(format) ((format) >= CAIRO_FORMAT_ARGB32 &&          \
1466                                     (format) <= CAIRO_FORMAT_RGB30)
1467
1468 /* pixman-required stride alignment in bytes. */
1469 #define CAIRO_STRIDE_ALIGNMENT (sizeof (uint32_t))
1470 #define CAIRO_STRIDE_FOR_WIDTH_BPP(w,bpp) \
1471    ((((bpp)*(w)+7)/8 + CAIRO_STRIDE_ALIGNMENT-1) & -CAIRO_STRIDE_ALIGNMENT)
1472
1473 #define CAIRO_CONTENT_VALID(content) ((content) &&                               \
1474                                       (((content) & ~(CAIRO_CONTENT_COLOR |      \
1475                                                       CAIRO_CONTENT_ALPHA |      \
1476                                                       CAIRO_CONTENT_COLOR_ALPHA))\
1477                                        == 0))
1478
1479 cairo_private int
1480 _cairo_format_bits_per_pixel (cairo_format_t format) cairo_const;
1481
1482 cairo_private cairo_format_t
1483 _cairo_format_from_content (cairo_content_t content) cairo_const;
1484
1485 cairo_private cairo_format_t
1486 _cairo_format_from_pixman_format (pixman_format_code_t pixman_format);
1487
1488 cairo_private cairo_content_t
1489 _cairo_content_from_format (cairo_format_t format) cairo_const;
1490
1491 cairo_private cairo_content_t
1492 _cairo_content_from_pixman_format (pixman_format_code_t pixman_format);
1493
1494 cairo_private cairo_surface_t *
1495 _cairo_image_surface_create_for_pixman_image (pixman_image_t            *pixman_image,
1496                                               pixman_format_code_t       pixman_format);
1497
1498 cairo_private pixman_format_code_t
1499 _cairo_format_to_pixman_format_code (cairo_format_t format);
1500
1501 cairo_private cairo_bool_t
1502 _pixman_format_from_masks (cairo_format_masks_t *masks,
1503                            pixman_format_code_t *format_ret);
1504
1505 cairo_private cairo_bool_t
1506 _pixman_format_to_masks (pixman_format_code_t    pixman_format,
1507                          cairo_format_masks_t   *masks);
1508
1509 cairo_private void
1510 _cairo_image_scaled_glyph_fini (cairo_scaled_font_t *scaled_font,
1511                                 cairo_scaled_glyph_t *scaled_glyph);
1512
1513 cairo_private void
1514 _cairo_image_reset_static_data (void);
1515
1516 cairo_private cairo_surface_t *
1517 _cairo_image_surface_create_with_pixman_format (unsigned char           *data,
1518                                                 pixman_format_code_t     pixman_format,
1519                                                 int                      width,
1520                                                 int                      height,
1521                                                 int                      stride);
1522
1523 cairo_private cairo_surface_t *
1524 _cairo_image_surface_create_with_content (cairo_content_t       content,
1525                                           int                   width,
1526                                           int                   height);
1527
1528 cairo_private void
1529 _cairo_image_surface_assume_ownership_of_data (cairo_image_surface_t *surface);
1530
1531 cairo_private cairo_image_surface_t *
1532 _cairo_image_surface_coerce (cairo_image_surface_t      *surface);
1533
1534 cairo_private cairo_image_surface_t *
1535 _cairo_image_surface_coerce_to_format (cairo_image_surface_t    *surface,
1536                                        cairo_format_t            format);
1537
1538 cairo_private cairo_image_transparency_t
1539 _cairo_image_analyze_transparency (cairo_image_surface_t      *image);
1540
1541 cairo_private cairo_image_color_t
1542 _cairo_image_analyze_color (cairo_image_surface_t      *image);
1543
1544 /* cairo-pen.c */
1545 cairo_private int
1546 _cairo_pen_vertices_needed (double          tolerance,
1547                             double          radius,
1548                             const cairo_matrix_t  *matrix);
1549
1550 cairo_private cairo_status_t
1551 _cairo_pen_init (cairo_pen_t    *pen,
1552                  double          radius,
1553                  double          tolerance,
1554                  const cairo_matrix_t   *ctm);
1555
1556 cairo_private void
1557 _cairo_pen_init_empty (cairo_pen_t *pen);
1558
1559 cairo_private cairo_status_t
1560 _cairo_pen_init_copy (cairo_pen_t *pen, const cairo_pen_t *other);
1561
1562 cairo_private void
1563 _cairo_pen_fini (cairo_pen_t *pen);
1564
1565 cairo_private cairo_status_t
1566 _cairo_pen_add_points (cairo_pen_t *pen, cairo_point_t *point, int num_points);
1567
1568 cairo_private int
1569 _cairo_pen_find_active_cw_vertex_index (const cairo_pen_t *pen,
1570                                         const cairo_slope_t *slope);
1571
1572 cairo_private int
1573 _cairo_pen_find_active_ccw_vertex_index (const cairo_pen_t *pen,
1574                                          const cairo_slope_t *slope);
1575
1576 cairo_private void
1577 _cairo_pen_find_active_cw_vertices (const cairo_pen_t *pen,
1578                                      const cairo_slope_t *in,
1579                                      const cairo_slope_t *out,
1580                                      int *start, int *stop);
1581
1582 cairo_private void
1583 _cairo_pen_find_active_ccw_vertices (const cairo_pen_t *pen,
1584                                      const cairo_slope_t *in,
1585                                      const cairo_slope_t *out,
1586                                      int *start, int *stop);
1587
1588 /* cairo-polygon.c */
1589 cairo_private void
1590 _cairo_polygon_init (cairo_polygon_t   *polygon,
1591                      const cairo_box_t *boxes,
1592                      int                num_boxes);
1593
1594 cairo_private void
1595 _cairo_polygon_init_with_clip (cairo_polygon_t *polygon,
1596                                const cairo_clip_t *clip);
1597
1598 cairo_private cairo_status_t
1599 _cairo_polygon_init_boxes (cairo_polygon_t *polygon,
1600                            const cairo_boxes_t *boxes);
1601
1602 cairo_private cairo_status_t
1603 _cairo_polygon_init_box_array (cairo_polygon_t *polygon,
1604                                cairo_box_t *boxes,
1605                                int num_boxes);
1606
1607 cairo_private void
1608 _cairo_polygon_limit (cairo_polygon_t *polygon,
1609                      const cairo_box_t *limits,
1610                      int num_limits);
1611
1612 cairo_private void
1613 _cairo_polygon_limit_to_clip (cairo_polygon_t *polygon,
1614                               const cairo_clip_t *clip);
1615
1616 cairo_private void
1617 _cairo_polygon_fini (cairo_polygon_t *polygon);
1618
1619 cairo_private cairo_status_t
1620 _cairo_polygon_add_line (cairo_polygon_t *polygon,
1621                          const cairo_line_t *line,
1622                          int top, int bottom,
1623                          int dir);
1624
1625 cairo_private cairo_status_t
1626 _cairo_polygon_add_external_edge (void *polygon,
1627                                   const cairo_point_t *p1,
1628                                   const cairo_point_t *p2);
1629
1630 cairo_private cairo_status_t
1631 _cairo_polygon_add_contour (cairo_polygon_t *polygon,
1632                             const cairo_contour_t *contour);
1633
1634 cairo_private void
1635 _cairo_polygon_translate (cairo_polygon_t *polygon, int dx, int dy);
1636
1637 cairo_private cairo_status_t
1638 _cairo_polygon_reduce (cairo_polygon_t *polygon,
1639                        cairo_fill_rule_t fill_rule);
1640
1641 cairo_private cairo_status_t
1642 _cairo_polygon_intersect (cairo_polygon_t *a, int winding_a,
1643                           cairo_polygon_t *b, int winding_b);
1644
1645 cairo_private cairo_status_t
1646 _cairo_polygon_intersect_with_boxes (cairo_polygon_t *polygon,
1647                                      cairo_fill_rule_t *winding,
1648                                      cairo_box_t *boxes,
1649                                      int num_boxes);
1650
1651 static inline cairo_bool_t
1652 _cairo_polygon_is_empty (const cairo_polygon_t *polygon)
1653 {
1654     return
1655         polygon->num_edges == 0 ||
1656         polygon->extents.p2.x <= polygon->extents.p1.x;
1657 }
1658
1659 #define _cairo_polygon_status(P) ((cairo_polygon_t *) (P))->status
1660
1661 /* cairo-spline.c */
1662 cairo_private cairo_bool_t
1663 _cairo_spline_init (cairo_spline_t *spline,
1664                     cairo_spline_add_point_func_t add_point_func,
1665                     void *closure,
1666                     const cairo_point_t *a, const cairo_point_t *b,
1667                     const cairo_point_t *c, const cairo_point_t *d);
1668
1669 cairo_private cairo_status_t
1670 _cairo_spline_decompose (cairo_spline_t *spline, double tolerance);
1671
1672 cairo_private cairo_status_t
1673 _cairo_spline_bound (cairo_spline_add_point_func_t add_point_func,
1674                      void *closure,
1675                      const cairo_point_t *p0, const cairo_point_t *p1,
1676                      const cairo_point_t *p2, const cairo_point_t *p3);
1677
1678 /* cairo-matrix.c */
1679 cairo_private void
1680 _cairo_matrix_get_affine (const cairo_matrix_t *matrix,
1681                           double *xx, double *yx,
1682                           double *xy, double *yy,
1683                           double *x0, double *y0);
1684
1685 cairo_private void
1686 _cairo_matrix_transform_bounding_box (const cairo_matrix_t *matrix,
1687                                       double *x1, double *y1,
1688                                       double *x2, double *y2,
1689                                       cairo_bool_t *is_tight);
1690
1691 cairo_private void
1692 _cairo_matrix_transform_bounding_box_fixed (const cairo_matrix_t *matrix,
1693                                             cairo_box_t          *bbox,
1694                                             cairo_bool_t         *is_tight);
1695
1696 cairo_private cairo_bool_t
1697 _cairo_matrix_is_invertible (const cairo_matrix_t *matrix) cairo_pure;
1698
1699 cairo_private cairo_bool_t
1700 _cairo_matrix_is_scale_0 (const cairo_matrix_t *matrix) cairo_pure;
1701
1702 cairo_private double
1703 _cairo_matrix_compute_determinant (const cairo_matrix_t *matrix) cairo_pure;
1704
1705 cairo_private cairo_status_t
1706 _cairo_matrix_compute_basis_scale_factors (const cairo_matrix_t *matrix,
1707                                            double *sx, double *sy, int x_major);
1708
1709 static inline cairo_bool_t
1710 _cairo_matrix_is_identity (const cairo_matrix_t *matrix)
1711 {
1712     return (matrix->xx == 1.0 && matrix->yx == 0.0 &&
1713             matrix->xy == 0.0 && matrix->yy == 1.0 &&
1714             matrix->x0 == 0.0 && matrix->y0 == 0.0);
1715 }
1716
1717 static inline cairo_bool_t
1718 _cairo_matrix_is_translation (const cairo_matrix_t *matrix)
1719 {
1720     return (matrix->xx == 1.0 && matrix->yx == 0.0 &&
1721             matrix->xy == 0.0 && matrix->yy == 1.0);
1722 }
1723
1724 static inline cairo_bool_t
1725 _cairo_matrix_is_scale (const cairo_matrix_t *matrix)
1726 {
1727     return matrix->yx == 0.0 && matrix->xy == 0.0;
1728 }
1729
1730 cairo_private cairo_bool_t
1731 _cairo_matrix_is_integer_translation(const cairo_matrix_t *matrix,
1732                                      int *itx, int *ity);
1733
1734 cairo_private cairo_bool_t
1735 _cairo_matrix_has_unity_scale (const cairo_matrix_t *matrix);
1736
1737 cairo_private cairo_bool_t
1738 _cairo_matrix_is_pixel_exact (const cairo_matrix_t *matrix) cairo_pure;
1739
1740 cairo_private double
1741 _cairo_matrix_transformed_circle_major_axis (const cairo_matrix_t *matrix,
1742                                              double radius) cairo_pure;
1743
1744 cairo_private cairo_bool_t
1745 _cairo_matrix_is_pixman_translation (const cairo_matrix_t     *matrix,
1746                                      cairo_filter_t            filter,
1747                                      int                      *out_x_offset,
1748                                      int                      *out_y_offset);
1749
1750 cairo_private cairo_status_t
1751 _cairo_matrix_to_pixman_matrix_offset (const cairo_matrix_t     *matrix,
1752                                        cairo_filter_t            filter,
1753                                        double                    xc,
1754                                        double                    yc,
1755                                        pixman_transform_t       *out_transform,
1756                                        int                      *out_x_offset,
1757                                        int                      *out_y_offset);
1758
1759 cairo_private cairo_status_t
1760 _cairo_bentley_ottmann_tessellate_rectilinear_polygon (cairo_traps_t     *traps,
1761                                                        const cairo_polygon_t *polygon,
1762                                                        cairo_fill_rule_t          fill_rule);
1763
1764 cairo_private cairo_status_t
1765 _cairo_bentley_ottmann_tessellate_polygon (cairo_traps_t         *traps,
1766                                            const cairo_polygon_t *polygon,
1767                                            cairo_fill_rule_t      fill_rule);
1768
1769 cairo_private cairo_status_t
1770 _cairo_bentley_ottmann_tessellate_traps (cairo_traps_t *traps,
1771                                          cairo_fill_rule_t fill_rule);
1772
1773 cairo_private cairo_status_t
1774 _cairo_bentley_ottmann_tessellate_rectangular_traps (cairo_traps_t *traps,
1775                                                      cairo_fill_rule_t fill_rule);
1776
1777 cairo_private cairo_status_t
1778 _cairo_bentley_ottmann_tessellate_boxes (const cairo_boxes_t *in,
1779                                          cairo_fill_rule_t fill_rule,
1780                                          cairo_boxes_t *out);
1781
1782 cairo_private cairo_status_t
1783 _cairo_bentley_ottmann_tessellate_rectilinear_traps (cairo_traps_t *traps,
1784                                                      cairo_fill_rule_t fill_rule);
1785
1786 cairo_private cairo_status_t
1787 _cairo_bentley_ottmann_tessellate_rectilinear_polygon_to_boxes (const cairo_polygon_t *polygon,
1788                                                                 cairo_fill_rule_t fill_rule,
1789                                                                 cairo_boxes_t *boxes);
1790
1791 cairo_private void
1792 _cairo_trapezoid_array_translate_and_scale (cairo_trapezoid_t *offset_traps,
1793                                             cairo_trapezoid_t *src_traps,
1794                                             int num_traps,
1795                                             double tx, double ty,
1796                                             double sx, double sy);
1797
1798 #if CAIRO_HAS_DRM_SURFACE
1799
1800 cairo_private void
1801 _cairo_drm_device_reset_static_data (void);
1802
1803 #endif
1804
1805 cairo_private void
1806 _cairo_clip_reset_static_data (void);
1807
1808 cairo_private void
1809 _cairo_pattern_reset_static_data (void);
1810
1811 /* cairo-unicode.c */
1812
1813 cairo_private int
1814 _cairo_utf8_get_char_validated (const char *p,
1815                                 uint32_t   *unicode);
1816
1817 cairo_private cairo_status_t
1818 _cairo_utf8_to_ucs4 (const char *str,
1819                      int         len,
1820                      uint32_t  **result,
1821                      int        *items_written);
1822
1823 cairo_private int
1824 _cairo_ucs4_to_utf8 (uint32_t    unicode,
1825                      char       *utf8);
1826
1827 #if CAIRO_HAS_WIN32_FONT || CAIRO_HAS_QUARTZ_FONT || CAIRO_HAS_PDF_OPERATORS
1828 # define CAIRO_HAS_UTF8_TO_UTF16 1
1829 #endif
1830 #if CAIRO_HAS_UTF8_TO_UTF16
1831 cairo_private cairo_status_t
1832 _cairo_utf8_to_utf16 (const char *str,
1833                       int         len,
1834                       uint16_t  **result,
1835                       int        *items_written);
1836 #endif
1837
1838 cairo_private void
1839 _cairo_matrix_multiply (cairo_matrix_t *r,
1840                         const cairo_matrix_t *a,
1841                         const cairo_matrix_t *b);
1842
1843 /* cairo-observer.c */
1844
1845 cairo_private void
1846 _cairo_observers_notify (cairo_list_t *observers, void *arg);
1847
1848 /* Avoid unnecessary PLT entries.  */
1849 slim_hidden_proto (cairo_clip_preserve);
1850 slim_hidden_proto (cairo_close_path);
1851 slim_hidden_proto (cairo_create);
1852 slim_hidden_proto (cairo_curve_to);
1853 slim_hidden_proto (cairo_destroy);
1854 slim_hidden_proto (cairo_fill_preserve);
1855 slim_hidden_proto (cairo_font_face_destroy);
1856 slim_hidden_proto (cairo_font_face_get_user_data);
1857 slim_hidden_proto_no_warn (cairo_font_face_reference);
1858 slim_hidden_proto (cairo_font_face_set_user_data);
1859 slim_hidden_proto (cairo_font_options_equal);
1860 slim_hidden_proto (cairo_font_options_hash);
1861 slim_hidden_proto (cairo_font_options_merge);
1862 slim_hidden_proto (cairo_font_options_set_antialias);
1863 slim_hidden_proto (cairo_font_options_set_hint_metrics);
1864 slim_hidden_proto (cairo_font_options_set_hint_style);
1865 slim_hidden_proto (cairo_font_options_set_subpixel_order);
1866 slim_hidden_proto (cairo_font_options_status);
1867 slim_hidden_proto (cairo_format_stride_for_width);
1868 slim_hidden_proto (cairo_get_current_point);
1869 slim_hidden_proto (cairo_get_line_width);
1870 slim_hidden_proto (cairo_get_matrix);
1871 slim_hidden_proto (cairo_get_scaled_font);
1872 slim_hidden_proto (cairo_get_target);
1873 slim_hidden_proto (cairo_get_tolerance);
1874 slim_hidden_proto (cairo_glyph_allocate);
1875 slim_hidden_proto (cairo_glyph_free);
1876 slim_hidden_proto (cairo_image_surface_create);
1877 slim_hidden_proto (cairo_image_surface_create_for_data);
1878 slim_hidden_proto (cairo_image_surface_get_data);
1879 slim_hidden_proto (cairo_image_surface_get_format);
1880 slim_hidden_proto (cairo_image_surface_get_height);
1881 slim_hidden_proto (cairo_image_surface_get_stride);
1882 slim_hidden_proto (cairo_image_surface_get_width);
1883 slim_hidden_proto (cairo_line_to);
1884 slim_hidden_proto (cairo_mask);
1885 slim_hidden_proto (cairo_matrix_init);
1886 slim_hidden_proto (cairo_matrix_init_identity);
1887 slim_hidden_proto (cairo_matrix_init_rotate);
1888 slim_hidden_proto (cairo_matrix_init_scale);
1889 slim_hidden_proto (cairo_matrix_init_translate);
1890 slim_hidden_proto (cairo_matrix_invert);
1891 slim_hidden_proto (cairo_matrix_multiply);
1892 slim_hidden_proto (cairo_matrix_scale);
1893 slim_hidden_proto (cairo_matrix_transform_distance);
1894 slim_hidden_proto (cairo_matrix_transform_point);
1895 slim_hidden_proto (cairo_matrix_translate);
1896 slim_hidden_proto (cairo_move_to);
1897 slim_hidden_proto (cairo_new_path);
1898 slim_hidden_proto (cairo_paint);
1899 slim_hidden_proto (cairo_pattern_add_color_stop_rgba);
1900 slim_hidden_proto (cairo_pattern_create_for_surface);
1901 slim_hidden_proto (cairo_pattern_create_rgb);
1902 slim_hidden_proto (cairo_pattern_create_rgba);
1903 slim_hidden_proto (cairo_pattern_destroy);
1904 slim_hidden_proto (cairo_pattern_get_extend);
1905 slim_hidden_proto (cairo_mesh_pattern_curve_to);
1906 slim_hidden_proto (cairo_mesh_pattern_get_control_point);
1907 slim_hidden_proto (cairo_mesh_pattern_get_corner_color_rgba);
1908 slim_hidden_proto (cairo_mesh_pattern_get_patch_count);
1909 slim_hidden_proto (cairo_mesh_pattern_get_path);
1910 slim_hidden_proto (cairo_mesh_pattern_line_to);
1911 slim_hidden_proto (cairo_mesh_pattern_move_to);
1912 slim_hidden_proto (cairo_mesh_pattern_set_corner_color_rgba);
1913 slim_hidden_proto_no_warn (cairo_pattern_reference);
1914 slim_hidden_proto (cairo_pattern_set_matrix);
1915 slim_hidden_proto (cairo_pop_group);
1916 slim_hidden_proto (cairo_push_group_with_content);
1917 slim_hidden_proto_no_warn (cairo_path_destroy);
1918 slim_hidden_proto (cairo_rel_line_to);
1919 slim_hidden_proto (cairo_restore);
1920 slim_hidden_proto (cairo_save);
1921 slim_hidden_proto (cairo_scale);
1922 slim_hidden_proto (cairo_scaled_font_create);
1923 slim_hidden_proto (cairo_scaled_font_destroy);
1924 slim_hidden_proto (cairo_scaled_font_extents);
1925 slim_hidden_proto (cairo_scaled_font_get_ctm);
1926 slim_hidden_proto (cairo_scaled_font_get_font_face);
1927 slim_hidden_proto (cairo_scaled_font_get_font_matrix);
1928 slim_hidden_proto (cairo_scaled_font_get_font_options);
1929 slim_hidden_proto (cairo_scaled_font_glyph_extents);
1930 slim_hidden_proto_no_warn (cairo_scaled_font_reference);
1931 slim_hidden_proto (cairo_scaled_font_status);
1932 slim_hidden_proto (cairo_scaled_font_get_user_data);
1933 slim_hidden_proto (cairo_scaled_font_set_user_data);
1934 slim_hidden_proto (cairo_scaled_font_text_to_glyphs);
1935 slim_hidden_proto (cairo_set_font_matrix);
1936 slim_hidden_proto (cairo_set_font_options);
1937 slim_hidden_proto (cairo_set_font_size);
1938 slim_hidden_proto (cairo_set_line_cap);
1939 slim_hidden_proto (cairo_set_line_join);
1940 slim_hidden_proto (cairo_set_line_width);
1941 slim_hidden_proto (cairo_set_matrix);
1942 slim_hidden_proto (cairo_set_operator);
1943 slim_hidden_proto (cairo_set_source);
1944 slim_hidden_proto (cairo_set_source_rgb);
1945 slim_hidden_proto (cairo_set_source_surface);
1946 slim_hidden_proto (cairo_set_tolerance);
1947 slim_hidden_proto (cairo_status);
1948 slim_hidden_proto (cairo_stroke);
1949 slim_hidden_proto (cairo_stroke_preserve);
1950 slim_hidden_proto (cairo_surface_copy_page);
1951 slim_hidden_proto (cairo_surface_create_similar_image);
1952 slim_hidden_proto (cairo_surface_destroy);
1953 slim_hidden_proto (cairo_surface_finish);
1954 slim_hidden_proto (cairo_surface_flush);
1955 slim_hidden_proto (cairo_surface_get_device_offset);
1956 slim_hidden_proto (cairo_surface_get_font_options);
1957 slim_hidden_proto (cairo_surface_get_mime_data);
1958 slim_hidden_proto (cairo_surface_has_show_text_glyphs);
1959 slim_hidden_proto (cairo_surface_mark_dirty);
1960 slim_hidden_proto (cairo_surface_mark_dirty_rectangle);
1961 slim_hidden_proto_no_warn (cairo_surface_reference);
1962 slim_hidden_proto (cairo_surface_set_device_offset);
1963 slim_hidden_proto (cairo_surface_set_fallback_resolution);
1964 slim_hidden_proto (cairo_surface_set_mime_data);
1965 slim_hidden_proto (cairo_surface_show_page);
1966 slim_hidden_proto (cairo_surface_status);
1967 slim_hidden_proto (cairo_surface_supports_mime_type);
1968 slim_hidden_proto (cairo_text_cluster_allocate);
1969 slim_hidden_proto (cairo_text_cluster_free);
1970 slim_hidden_proto (cairo_toy_font_face_create);
1971 slim_hidden_proto (cairo_toy_font_face_get_slant);
1972 slim_hidden_proto (cairo_toy_font_face_get_weight);
1973 slim_hidden_proto (cairo_translate);
1974 slim_hidden_proto (cairo_transform);
1975 slim_hidden_proto (cairo_user_font_face_create);
1976 slim_hidden_proto (cairo_user_font_face_set_init_func);
1977 slim_hidden_proto (cairo_user_font_face_set_render_glyph_func);
1978 slim_hidden_proto (cairo_user_font_face_set_unicode_to_glyph_func);
1979 slim_hidden_proto (cairo_device_to_user);
1980 slim_hidden_proto (cairo_user_to_device);
1981 slim_hidden_proto (cairo_user_to_device_distance);
1982 slim_hidden_proto (cairo_version_string);
1983 slim_hidden_proto (cairo_region_create);
1984 slim_hidden_proto (cairo_region_create_rectangle);
1985 slim_hidden_proto (cairo_region_create_rectangles);
1986 slim_hidden_proto (cairo_region_copy);
1987 slim_hidden_proto (cairo_region_reference);
1988 slim_hidden_proto (cairo_region_destroy);
1989 slim_hidden_proto (cairo_region_equal);
1990 slim_hidden_proto (cairo_region_status);
1991 slim_hidden_proto (cairo_region_get_extents);
1992 slim_hidden_proto (cairo_region_num_rectangles);
1993 slim_hidden_proto (cairo_region_get_rectangle);
1994 slim_hidden_proto (cairo_region_is_empty);
1995 slim_hidden_proto (cairo_region_contains_rectangle);
1996 slim_hidden_proto (cairo_region_contains_point);
1997 slim_hidden_proto (cairo_region_translate);
1998 slim_hidden_proto (cairo_region_subtract);
1999 slim_hidden_proto (cairo_region_subtract_rectangle);
2000 slim_hidden_proto (cairo_region_intersect);
2001 slim_hidden_proto (cairo_region_intersect_rectangle);
2002 slim_hidden_proto (cairo_region_union);
2003 slim_hidden_proto (cairo_region_union_rectangle);
2004 slim_hidden_proto (cairo_region_xor);
2005 slim_hidden_proto (cairo_region_xor_rectangle);
2006
2007 #if CAIRO_HAS_PNG_FUNCTIONS
2008
2009 slim_hidden_proto (cairo_surface_write_to_png_stream);
2010
2011 #endif
2012
2013 cairo_private_no_warn cairo_filter_t
2014 _cairo_pattern_analyze_filter (const cairo_pattern_t    *pattern,
2015                                double                   *pad_out);
2016
2017 CAIRO_END_DECLS
2018
2019 #include "cairo-mutex-private.h"
2020 #include "cairo-fixed-private.h"
2021 #include "cairo-wideint-private.h"
2022 #include "cairo-malloc-private.h"
2023 #include "cairo-hash-private.h"
2024
2025 #if HAVE_VALGRIND
2026 #include <memcheck.h>
2027
2028 #define VG(x) x
2029
2030 cairo_private void
2031 _cairo_debug_check_image_surface_is_defined (const cairo_surface_t *surface);
2032
2033 #else
2034
2035 #define VG(x)
2036 #define _cairo_debug_check_image_surface_is_defined(X)
2037
2038 #endif
2039
2040 cairo_private void
2041 _cairo_debug_print_path (FILE *stream, cairo_path_fixed_t *path);
2042
2043 cairo_private void
2044 _cairo_debug_print_polygon (FILE *stream, cairo_polygon_t *polygon);
2045
2046 cairo_private void
2047 _cairo_debug_print_traps (FILE *file, const cairo_traps_t *traps);
2048
2049 cairo_private void
2050 _cairo_debug_print_clip (FILE *stream, const cairo_clip_t *clip);
2051
2052 #if 0
2053 #define TRACE(x) fprintf x
2054 #define TRACE_(x) x
2055 #else
2056 #define TRACE(x)
2057 #define TRACE_(x)
2058 #endif
2059
2060 #endif