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cairoint.h

/* cairo - a vector graphics library with display and print output
 *
 * Copyright © 2002 University of Southern California
 * Copyright © 2005 Red Hat, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it either under the terms of the GNU Lesser General Public
 * License version 2.1 as published by the Free Software Foundation
 * (the "LGPL") or, at your option, under the terms of the Mozilla
 * Public License Version 1.1 (the "MPL"). If you do not alter this
 * notice, a recipient may use your version of this file under either
 * the MPL or the LGPL.
 *
 * You should have received a copy of the LGPL along with this library
 * in the file COPYING-LGPL-2.1; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 * You should have received a copy of the MPL along with this library
 * in the file COPYING-MPL-1.1
 *
 * The contents of this file are subject to the Mozilla Public License
 * Version 1.1 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
 * OF ANY KIND, either express or implied. See the LGPL or the MPL for
 * the specific language governing rights and limitations.
 *
 * The Original Code is the cairo graphics library.
 *
 * The Initial Developer of the Original Code is University of Southern
 * California.
 *
 * Contributor(s):
 *    Carl D. Worth <cworth@cworth.org>
 */

/*
 * These definitions are solely for use by the implementation of cairo
 * and constitute no kind of standard.  If you need any of these
 * functions, please drop me a note.  Either the library needs new
 * functionality, or there's a way to do what you need using the
 * existing published interfaces. cworth@cworth.org
 */

#ifndef _CAIROINT_H_
#define _CAIROINT_H_

#if HAVE_CONFIG_H
#include "config.h"
#endif

#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <stddef.h>

#ifdef _MSC_VER
#define _USE_MATH_DEFINES
#endif
#include <math.h>
#include <limits.h>
#include <stdio.h>

#include "cairo.h"
#include <pixman.h>

#include "cairo-compiler-private.h"

CAIRO_BEGIN_DECLS

#ifdef _WIN32
cairo_private FILE *
_cairo_win32_tmpfile (void);
#define tmpfile() _cairo_win32_tmpfile()
#endif

#undef MIN
#define MIN(a, b) ((a) < (b) ? (a) : (b))

#undef MAX
#define MAX(a, b) ((a) > (b) ? (a) : (b))

#ifndef FALSE
#define FALSE 0
#endif

#ifndef TRUE
#define TRUE 1
#endif

#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif

#ifndef NDEBUG
#undef assert
#define assert(expr) \
    do { if (!(expr)) fprintf(stderr, "Assertion failed at %s:%d: %s\n", \
          __FILE__, __LINE__, #expr); } while (0)
#endif

#ifndef M_SQRT2
#define M_SQRT2 1.41421356237309504880
#endif

#ifndef M_SQRT1_2
#define M_SQRT1_2 0.707106781186547524400844362104849039
#endif

#undef  ARRAY_LENGTH
#define ARRAY_LENGTH(__array) ((int) (sizeof (__array) / sizeof (__array[0])))


/* This has to be updated whenever #cairo_status_t is extended.  That's
 * a bit of a pain, but it should be easy to always catch as long as
 * one adds a new test case to test a trigger of the new status value.
 */
#define CAIRO_STATUS_LAST_STATUS CAIRO_STATUS_INVALID_STRIDE


/* Size in bytes of buffer to use off the stack per functions.
 * Mostly used by text functions.  For larger allocations, they'll
 * malloc(). */
#ifndef CAIRO_STACK_BUFFER_SIZE
#define CAIRO_STACK_BUFFER_SIZE (512 * sizeof (int))
#endif

#define CAIRO_STACK_ARRAY_LENGTH(T) (CAIRO_STACK_BUFFER_SIZE / sizeof(T))

#define ASSERT_NOT_REACHED          \
do {                          \
    static const int NOT_REACHED = 0;     \
    assert (NOT_REACHED);           \
} while (0)

#define CAIRO_ALPHA_IS_OPAQUE(alpha) ((alpha) >= ((double)0xff00 / (double)0xffff))
#define CAIRO_ALPHA_SHORT_IS_OPAQUE(alpha) ((alpha) >= 0xff00)
#define CAIRO_ALPHA_IS_ZERO(alpha) ((alpha) <= 0.0)

#define CAIRO_COLOR_IS_OPAQUE(color) CAIRO_ALPHA_SHORT_IS_OPAQUE ((color)->alpha_short)

/* Reverse the bits in a byte with 7 operations (no 64-bit):
 * Devised by Sean Anderson, July 13, 2001.
 * Source: http://graphics.stanford.edu/~seander/bithacks.html#ReverseByteWith32Bits
 */
#define CAIRO_BITSWAP8(c) ((((c) * 0x0802LU & 0x22110LU) | ((c) * 0x8020LU & 0x88440LU)) * 0x10101LU >> 16)

/* Return the number of 1 bits in mask.
 *
 * GCC 3.4 supports a "population count" builtin, which on many targets is
 * implemented with a single instruction. There is a fallback definition
 * in libgcc in case a target does not have one, which should be just as
 * good as the open-coded solution below, (which is "HACKMEM 169").
 */
static inline int
_cairo_popcount (uint32_t mask)
{
#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
    return __builtin_popcount (mask);
#else
    register int y;

    y = (mask >> 1) &033333333333;
    y = mask - y - ((y >>1) & 033333333333);
    return (((y + (y >> 3)) & 030707070707) % 077);
#endif
}

#ifdef WORDS_BIGENDIAN
#define CAIRO_BITSWAP8_IF_LITTLE_ENDIAN(c) (c)
#else
#define CAIRO_BITSWAP8_IF_LITTLE_ENDIAN(c) CAIRO_BITSWAP8(c)
#endif

#ifdef WORDS_BIGENDIAN

#define cpu_to_be16(v) (v)
#define be16_to_cpu(v) (v)
#define cpu_to_be32(v) (v)
#define be32_to_cpu(v) (v)

#else

static inline uint16_t
cpu_to_be16(uint16_t v)
{
    return (v << 8) | (v >> 8);
}

static inline uint16_t
be16_to_cpu(uint16_t v)
{
    return cpu_to_be16 (v);
}

static inline uint32_t
cpu_to_be32(uint32_t v)
{
    return (cpu_to_be16 (v) << 16) | cpu_to_be16 (v >> 16);
}

static inline uint32_t
be32_to_cpu(uint32_t v)
{
    return cpu_to_be32 (v);
}

#endif

#include "cairo-types-private.h"
#include "cairo-cache-private.h"
#include "cairo-reference-count-private.h"

cairo_private void
_cairo_box_round_to_rectangle (cairo_box_t *box, cairo_rectangle_int_t *rectangle);

cairo_private void
_cairo_rectangle_intersect (cairo_rectangle_int_t *dest, cairo_rectangle_int_t *src);

cairo_private cairo_bool_t
_cairo_box_intersects_line_segment (cairo_box_t *box, cairo_line_t *line);

cairo_private cairo_bool_t
_cairo_box_contains_point (cairo_box_t *box, cairo_point_t *point);

/* cairo_array.c structures and functions */

cairo_private void
_cairo_array_init (cairo_array_t *array, int element_size);

cairo_private void
_cairo_array_init_snapshot (cairo_array_t *array,
                      const cairo_array_t *other);

cairo_private void
_cairo_array_fini (cairo_array_t *array);

cairo_private cairo_status_t
_cairo_array_grow_by (cairo_array_t *array, unsigned int additional);

cairo_private void
_cairo_array_truncate (cairo_array_t *array, unsigned int num_elements);

cairo_private cairo_status_t
_cairo_array_append (cairo_array_t *array, const void *element);

cairo_private cairo_status_t
_cairo_array_append_multiple (cairo_array_t     *array,
                        const void  *elements,
                        int          num_elements);

cairo_private cairo_status_t
_cairo_array_allocate (cairo_array_t       *array,
                   unsigned int       num_elements,
                   void       **elements);

cairo_private void *
_cairo_array_index (cairo_array_t *array, unsigned int index);

cairo_private void
_cairo_array_copy_element (cairo_array_t *array, int index, void *dst);

cairo_private int
_cairo_array_num_elements (cairo_array_t *array);

cairo_private int
_cairo_array_size (cairo_array_t *array);

cairo_private void
_cairo_user_data_array_init (cairo_user_data_array_t *array);

cairo_private void
_cairo_user_data_array_fini (cairo_user_data_array_t *array);

cairo_private void *
_cairo_user_data_array_get_data (cairo_user_data_array_t     *array,
                         const cairo_user_data_key_t *key);

cairo_private cairo_status_t
_cairo_user_data_array_set_data (cairo_user_data_array_t     *array,
                         const cairo_user_data_key_t *key,
                         void                  *user_data,
                         cairo_destroy_func_t         destroy);

cairo_private unsigned long
_cairo_hash_string (const char *c);

typedef struct _cairo_unscaled_font_backend cairo_unscaled_font_backend_t;

/*
 * A #cairo_unscaled_font_t is just an opaque handle we use in the
 * glyph cache.
 */
typedef struct _cairo_unscaled_font {
    cairo_hash_entry_t               hash_entry;
    cairo_reference_count_t          ref_count;
    const cairo_unscaled_font_backend_t   *backend;
} cairo_unscaled_font_t;

typedef struct _cairo_scaled_glyph {
    cairo_cache_entry_t     cache_entry;  /* hash is glyph index */
    cairo_scaled_font_t     *scaled_font; /* font the glyph lives in */
    cairo_text_extents_t    metrics;            /* user-space metrics */
    cairo_box_t             bbox;         /* device-space bounds */
    int16_t                 x_advance;          /* device-space rounded X advance */
    int16_t                 y_advance;          /* device-space rounded Y advance */
    cairo_image_surface_t   *surface;           /* device-space image */
    cairo_path_fixed_t      *path;        /* device-space outline */
    void              *surface_private;   /* for the surface backend */
} cairo_scaled_glyph_t;

#define _cairo_scaled_glyph_index(g) ((g)->cache_entry.hash)
#define _cairo_scaled_glyph_set_index(g,i)  ((g)->cache_entry.hash = (i))

#include "cairo-scaled-font-private.h"

struct _cairo_font_face {
    /* hash_entry must be first */
    cairo_hash_entry_t hash_entry;
    cairo_status_t status;
    cairo_reference_count_t ref_count;
    cairo_user_data_array_t user_data;
    const cairo_font_face_backend_t *backend;
};

cairo_private void
_cairo_font_reset_static_data (void);

cairo_private void
_cairo_ft_font_reset_static_data (void);

/* the font backend interface */

struct _cairo_unscaled_font_backend {
    void (*destroy)               (void                      *unscaled_font);
};

/* #cairo_toy_font_face_t - simple family/slant/weight font faces used for
 * the built-in font API
 */

typedef struct _cairo_toy_font_face {
    cairo_font_face_t base;
    const char *family;
    cairo_bool_t owns_family;
    cairo_font_slant_t slant;
    cairo_font_weight_t weight;
} cairo_toy_font_face_t;

typedef enum _cairo_scaled_glyph_info {
    CAIRO_SCALED_GLYPH_INFO_METRICS = (1 << 0),
    CAIRO_SCALED_GLYPH_INFO_SURFACE = (1 << 1),
    CAIRO_SCALED_GLYPH_INFO_PATH    = (1 << 2)
} cairo_scaled_glyph_info_t;

typedef struct _cairo_scaled_font_subset {
    cairo_scaled_font_t *scaled_font;
    unsigned int font_id;
    unsigned int subset_id;

    /* Index of glyphs array is subset_glyph_index.
     * Value of glyphs array is scaled_font_glyph_index.
     */
    unsigned long *glyphs;
    unsigned long *to_unicode;
    char          **glyph_names;
    unsigned int num_glyphs;
    cairo_bool_t is_composite;
} cairo_scaled_font_subset_t;

struct _cairo_scaled_font_backend {
    cairo_font_type_t type;

    cairo_warn cairo_status_t
    (*create_toy)  (cairo_toy_font_face_t *toy_face,
                const cairo_matrix_t      *font_matrix,
                const cairo_matrix_t      *ctm,
                const cairo_font_options_t      *options,
                cairo_scaled_font_t        **scaled_font);

    void
    (*fini)       (void             *scaled_font);

    cairo_warn cairo_int_status_t
    (*scaled_glyph_init)      (void                  *scaled_font,
                         cairo_scaled_glyph_t        *scaled_glyph,
                         cairo_scaled_glyph_info_t    info);

    /* A backend only needs to implement this or ucs4_to_index(), not
     * both. This allows the backend to do something more sophisticated
     * then just converting characters one by one.
     */
    cairo_warn cairo_int_status_t
    (*text_to_glyphs) (void                *scaled_font,
                   double               x,
                   double               y,
                   const char          *utf8,
                   cairo_glyph_t      **glyphs,
                   int           *num_glyphs);

    unsigned long
    (*ucs4_to_index)          (void                  *scaled_font,
                         uint32_t               ucs4);
    cairo_warn cairo_int_status_t
    (*show_glyphs)      (void             *scaled_font,
                   cairo_operator_t  op,
                   cairo_pattern_t  *pattern,
                   cairo_surface_t  *surface,
                   int               source_x,
                   int               source_y,
                   int               dest_x,
                   int               dest_y,
                   unsigned int            width,
                   unsigned int            height,
                   cairo_glyph_t          *glyphs,
                   int               num_glyphs);

    cairo_warn cairo_int_status_t
    (*load_truetype_table)(void                   *scaled_font,
                           unsigned long         tag,
                           long                  offset,
                           unsigned char        *buffer,
                           unsigned long        *length);

    cairo_warn cairo_int_status_t
    (*map_glyphs_to_unicode)(void                       *scaled_font,
                                   cairo_scaled_font_subset_t *font_subset);

};

struct _cairo_font_face_backend {
    cairo_font_type_t   type;

    /* The destroy() function is allowed to resurrect the font face
     * by re-referencing. This is needed for the FreeType backend.
     */
    void
    (*destroy)     (void                  *font_face);

    cairo_warn cairo_status_t
    (*scaled_font_create) (void                       *font_face,
                     const cairo_matrix_t       *font_matrix,
                     const cairo_matrix_t       *ctm,
                     const cairo_font_options_t *options,
                     cairo_scaled_font_t         **scaled_font);
};

/* concrete font backends */
#if CAIRO_HAS_FT_FONT

extern const cairo_private struct _cairo_scaled_font_backend cairo_ft_scaled_font_backend;

#endif

#if CAIRO_HAS_WIN32_FONT

extern const cairo_private struct _cairo_scaled_font_backend cairo_win32_scaled_font_backend;

#endif

#if CAIRO_HAS_QUARTZ_FONT

extern const cairo_private struct _cairo_scaled_font_backend cairo_quartz_scaled_font_backend;

#endif

struct _cairo_surface_backend {
    cairo_surface_type_t type;

    cairo_surface_t *
    (*create_similar)         (void             *surface,
                         cairo_content_t   content,
                         int               width,
                         int               height);

    cairo_warn cairo_status_t
    (*finish)                 (void             *surface);

    cairo_warn cairo_status_t
    (*acquire_source_image)   (void                    *abstract_surface,
                         cairo_image_surface_t  **image_out,
                         void                   **image_extra);

    void
    (*release_source_image)   (void                   *abstract_surface,
                         cairo_image_surface_t  *image,
                         void                   *image_extra);

    cairo_warn cairo_status_t
    (*acquire_dest_image)       (void                    *abstract_surface,
                         cairo_rectangle_int_t   *interest_rect,
                         cairo_image_surface_t  **image_out,
                         cairo_rectangle_int_t   *image_rect,
                         void                   **image_extra);

    void
    (*release_dest_image)       (void                    *abstract_surface,
                         cairo_rectangle_int_t   *interest_rect,
                         cairo_image_surface_t   *image,
                         cairo_rectangle_int_t   *image_rect,
                         void                    *image_extra);

    /* Create a new surface (@clone_out) with the following
     * characteristics:
     *
     * 1. It is as compatible as possible with @surface (in terms of
     *    efficiency)
     *
     * 2. It has the same size as @src
     *
     * 3. It has the same contents as @src within the given rectangle.
     */
    cairo_warn cairo_status_t
    (*clone_similar)            (void                   *surface,
                         cairo_surface_t        *src,
                         int                     src_x,
                         int                     src_y,
                         int                     width,
                         int                     height,
                         cairo_surface_t       **clone_out);

    /* XXX: dst should be the first argument for consistency */
    cairo_warn cairo_int_status_t
    (*composite)        (cairo_operator_t  op,
                         cairo_pattern_t        *src,
                         cairo_pattern_t  *mask,
                         void             *dst,
                         int               src_x,
                         int               src_y,
                         int               mask_x,
                         int               mask_y,
                         int               dst_x,
                         int               dst_y,
                         unsigned int            width,
                         unsigned int            height);

    cairo_warn cairo_int_status_t
    (*fill_rectangles)        (void              *surface,
                         cairo_operator_t   op,
                         const cairo_color_t     *color,
                         cairo_rectangle_int_t   *rects,
                         int                num_rects);

    /* XXX: dst should be the first argument for consistency */
    cairo_warn cairo_int_status_t
    (*composite_trapezoids)   (cairo_operator_t  op,
                         cairo_pattern_t  *pattern,
                         void             *dst,
                         cairo_antialias_t       antialias,
                         int               src_x,
                         int               src_y,
                         int               dst_x,
                         int               dst_y,
                         unsigned int            width,
                         unsigned int            height,
                         cairo_trapezoid_t      *traps,
                         int               num_traps);

    cairo_warn cairo_int_status_t
    (*copy_page)        (void             *surface);

    cairo_warn cairo_int_status_t
    (*show_page)        (void             *surface);

    /* Set given region as the clip region for the surface, replacing
     * any previously set clip region.  Passing in a NULL region will
     * clear the surface clip region.
     *
     * The surface is expected to store the clip region and clip all
     * following drawing operations against it until the clip region
     * is cleared of replaced by another clip region.
     *
     * Cairo will call this function whenever a clip path can be
     * represented as a device pixel aligned set of rectangles.  When
     * this is not possible, cairo will use mask surfaces for
     * clipping.
     */
    cairo_warn cairo_int_status_t
    (*set_clip_region)        (void             *surface,
                         cairo_region_t         *region);

    /* Intersect the given path against the clip path currently set in
     * the surface, using the given fill_rule and tolerance, and set
     * the result as the new clipping path for the surface.  Passing
     * in a NULL path will clear the surface clipping path.
     *
     * The surface is expected to store the resulting clip path and
     * clip all following drawing operations against it until the clip
     * path cleared or intersected with a new path.
     *
     * If a surface implements this function, set_clip_region() will
     * never be called and should not be implemented.  If this
     * function is not implemented cairo will use set_clip_region()
     * (if available) and mask surfaces for clipping.
     */
    cairo_warn cairo_int_status_t
    (*intersect_clip_path)    (void             *dst,
                         cairo_path_fixed_t     *path,
                         cairo_fill_rule_t      fill_rule,
                         double                 tolerance,
                         cairo_antialias_t      antialias);

    /* Get the extents of the current surface. For many surface types
     * this will be as simple as { x=0, y=0, width=surface->width,
     * height=surface->height}.
     *
     * This function need not take account of any clipping from
     * set_clip_region since the generic version of set_clip_region
     * saves those, and the generic get_clip_extents will only call
     * into the specific surface->get_extents if there is no current
     * clip.
     */
    cairo_warn cairo_int_status_t
    (*get_extents)            (void              *surface,
                         cairo_rectangle_int_t   *rectangle);

    /*
     * This is an optional entry to let the surface manage its own glyph
     * resources. If null, render against this surface, using image
     * surfaces as glyphs.
     */
    cairo_warn cairo_int_status_t
    (*old_show_glyphs)        (cairo_scaled_font_t            *font,
                         cairo_operator_t        op,
                         cairo_pattern_t        *pattern,
                         void                   *surface,
                         int                     source_x,
                         int                     source_y,
                         int                     dest_x,
                         int                     dest_y,
                         unsigned int                  width,
                         unsigned int                  height,
                         cairo_glyph_t                *glyphs,
                         int                     num_glyphs);

    void
    (*get_font_options)         (void                  *surface,
                         cairo_font_options_t  *options);

    cairo_warn cairo_status_t
    (*flush)                    (void                  *surface);

    cairo_warn cairo_status_t
    (*mark_dirty_rectangle)     (void                  *surface,
                         int                    x,
                         int                    y,
                         int                    width,
                         int                    height);

    void
    (*scaled_font_fini)       (cairo_scaled_font_t   *scaled_font);

    void
    (*scaled_glyph_fini)      (cairo_scaled_glyph_t   *scaled_glyph,
                         cairo_scaled_font_t    *scaled_font);

    /* OK, I'm starting over somewhat by defining the 5 top-level
     * drawing operators for the surface backend here with consistent
     * naming and argument-order conventions. */
    cairo_warn cairo_int_status_t
    (*paint)                  (void             *surface,
                         cairo_operator_t  op,
                         cairo_pattern_t  *source);

    cairo_warn cairo_int_status_t
    (*mask)             (void             *surface,
                         cairo_operator_t  op,
                         cairo_pattern_t  *source,
                         cairo_pattern_t  *mask);

    cairo_warn cairo_int_status_t
    (*stroke)                 (void             *surface,
                         cairo_operator_t  op,
                         cairo_pattern_t  *source,
                         cairo_path_fixed_t     *path,
                         cairo_stroke_style_t   *style,
                         cairo_matrix_t         *ctm,
                         cairo_matrix_t         *ctm_inverse,
                         double                  tolerance,
                         cairo_antialias_t       antialias);

    cairo_warn cairo_int_status_t
    (*fill)             (void             *surface,
                         cairo_operator_t  op,
                         cairo_pattern_t  *source,
                         cairo_path_fixed_t     *path,
                         cairo_fill_rule_t       fill_rule,
                         double                  tolerance,
                         cairo_antialias_t       antialias);

    cairo_warn cairo_int_status_t
    (*show_glyphs)            (void             *surface,
                         cairo_operator_t  op,
                         cairo_pattern_t  *source,
                         cairo_glyph_t          *glyphs,
                         int               num_glyphs,
                         cairo_scaled_font_t    *scaled_font);

    cairo_surface_t *
    (*snapshot)               (void             *surface);

    cairo_bool_t
    (*is_similar)       (void             *surface_a,
                               void             *surface_b,
                         cairo_content_t         content);

    cairo_warn cairo_status_t
    (*reset)                  (void             *surface);

    cairo_warn cairo_int_status_t
    (*fill_stroke)            (void             *surface,
                         cairo_operator_t  fill_op,
                         cairo_pattern_t  *fill_source,
                         cairo_fill_rule_t       fill_rule,
                         double                  fill_tolerance,
                         cairo_antialias_t       fill_antialias,
                         cairo_path_fixed_t     *path,
                         cairo_operator_t  stroke_op,
                         cairo_pattern_t  *stroke_source,
                         cairo_stroke_style_t   *stroke_style,
                         cairo_matrix_t         *stroke_ctm,
                         cairo_matrix_t         *stroke_ctm_inverse,
                         double                  stroke_tolerance,
                         cairo_antialias_t       stroke_antialias);
};

#include "cairo-surface-private.h"

struct _cairo_image_surface {
    cairo_surface_t base;

    pixman_format_code_t pixman_format;
    cairo_format_t format;
    unsigned char *data;
    cairo_bool_t owns_data;
    cairo_bool_t has_clip;
    cairo_image_transparency_t transparency;

    int width;
    int height;
    int stride;
    int depth;

    pixman_image_t *pixman_image;
};

extern const cairo_private cairo_surface_backend_t cairo_image_surface_backend;

/* XXX: Right now, the _cairo_color structure puts unpremultiplied
   color in the doubles and premultiplied color in the shorts. Yes,
   this is crazy insane, (but at least we don't export this
   madness). I'm still working on a cleaner API, but in the meantime,
   at least this does prevent precision loss in color when changing
   alpha. */
struct _cairo_color {
    double red;
    double green;
    double blue;
    double alpha;

    unsigned short red_short;
    unsigned short green_short;
    unsigned short blue_short;
    unsigned short alpha_short;
};

#define CAIRO_EXTEND_SURFACE_DEFAULT CAIRO_EXTEND_NONE
#define CAIRO_EXTEND_GRADIENT_DEFAULT CAIRO_EXTEND_PAD
#define CAIRO_FILTER_DEFAULT CAIRO_FILTER_GOOD

struct _cairo_pattern {
    cairo_pattern_type_t      type;
    cairo_reference_count_t   ref_count;
    cairo_status_t            status;
    cairo_user_data_array_t   user_data;

    cairo_matrix_t            matrix;
    cairo_filter_t            filter;
    cairo_extend_t            extend;
};

typedef struct _cairo_solid_pattern {
    cairo_pattern_t base;
    cairo_color_t color;
    cairo_content_t content;
} cairo_solid_pattern_t;

extern const cairo_private cairo_solid_pattern_t _cairo_pattern_nil;
extern const cairo_private cairo_solid_pattern_t cairo_pattern_none;

typedef struct _cairo_surface_pattern {
    cairo_pattern_t base;

    cairo_surface_t *surface;
} cairo_surface_pattern_t;

typedef struct _cairo_gradient_stop {
    double offset;
    cairo_color_t color;
} cairo_gradient_stop_t;

typedef struct _cairo_gradient_pattern {
    cairo_pattern_t base;

    unsigned int      n_stops;
    unsigned int      stops_size;
    cairo_gradient_stop_t  *stops;
    cairo_gradient_stop_t   stops_embedded[2];
} cairo_gradient_pattern_t;

typedef struct _cairo_linear_pattern {
    cairo_gradient_pattern_t base;

    cairo_point_t p1;
    cairo_point_t p2;
} cairo_linear_pattern_t;

typedef struct _cairo_radial_pattern {
    cairo_gradient_pattern_t base;

    cairo_point_t c1;
    cairo_fixed_t r1;
    cairo_point_t c2;
    cairo_fixed_t r2;
} cairo_radial_pattern_t;

typedef union {
    cairo_gradient_pattern_t base;

    cairo_linear_pattern_t linear;
    cairo_radial_pattern_t radial;
} cairo_gradient_pattern_union_t;

typedef union {
    cairo_pattern_t base;

    cairo_solid_pattern_t        solid;
    cairo_surface_pattern_t      surface;
    cairo_gradient_pattern_union_t gradient;
} cairo_pattern_union_t;

typedef struct _cairo_surface_attributes {
    cairo_matrix_t matrix;
    cairo_extend_t extend;
    cairo_filter_t filter;
    int              x_offset;
    int              y_offset;
    cairo_bool_t   acquired;
    void       *extra;
} cairo_surface_attributes_t;

typedef struct _cairo_traps {
    cairo_status_t status;

    cairo_box_t extents;

    int num_traps;
    int traps_size;
    cairo_trapezoid_t *traps;
    cairo_trapezoid_t  traps_embedded[1];

    cairo_bool_t has_limits;
    cairo_box_t limits;
} cairo_traps_t;

#define CAIRO_FONT_SLANT_DEFAULT   CAIRO_FONT_SLANT_NORMAL
#define CAIRO_FONT_WEIGHT_DEFAULT  CAIRO_FONT_WEIGHT_NORMAL

#define CAIRO_WIN32_FONT_FAMILY_DEFAULT "Arial"
#define CAIRO_QUARTZ_FONT_FAMILY_DEFAULT  "Helvetica"
#define CAIRO_FT_FONT_FAMILY_DEFAULT     ""

#if   CAIRO_HAS_WIN32_FONT

#define CAIRO_FONT_FAMILY_DEFAULT CAIRO_WIN32_FONT_FAMILY_DEFAULT
#define CAIRO_SCALED_FONT_BACKEND_DEFAULT &cairo_win32_scaled_font_backend

#elif CAIRO_HAS_QUARTZ_FONT

#define CAIRO_FONT_FAMILY_DEFAULT CAIRO_QUARTZ_FONT_FAMILY_DEFAULT
#define CAIRO_SCALED_FONT_BACKEND_DEFAULT &cairo_quartz_scaled_font_backend

#elif CAIRO_HAS_FT_FONT

#define CAIRO_FONT_FAMILY_DEFAULT CAIRO_FT_FONT_FAMILY_DEFAULT
#define CAIRO_SCALED_FONT_BACKEND_DEFAULT &cairo_ft_scaled_font_backend

#else

/* Paranoia: this should have been caught by configure. */
#error No font backends are available.

#endif

#define CAIRO_GSTATE_OPERATOR_DEFAULT     CAIRO_OPERATOR_OVER
#define CAIRO_GSTATE_TOLERANCE_DEFAULT    0.1
#define CAIRO_GSTATE_FILL_RULE_DEFAULT    CAIRO_FILL_RULE_WINDING
#define CAIRO_GSTATE_LINE_WIDTH_DEFAULT   2.0
#define CAIRO_GSTATE_LINE_CAP_DEFAULT     CAIRO_LINE_CAP_BUTT
#define CAIRO_GSTATE_LINE_JOIN_DEFAULT    CAIRO_LINE_JOIN_MITER
#define CAIRO_GSTATE_MITER_LIMIT_DEFAULT  10.0
#define CAIRO_GSTATE_DEFAULT_FONT_SIZE  10.0

#define CAIRO_SURFACE_RESOLUTION_DEFAULT 72.0
#define CAIRO_SURFACE_FALLBACK_RESOLUTION_DEFAULT 300.0

typedef struct _cairo_gstate cairo_gstate_t;

typedef struct _cairo_stroke_face {
    cairo_point_t ccw;
    cairo_point_t point;
    cairo_point_t cw;
    cairo_slope_t dev_vector;
    cairo_point_double_t usr_vector;
} cairo_stroke_face_t;

/* cairo.c */
cairo_private void
_cairo_restrict_value (double *value, double min, double max);

cairo_private int
_cairo_lround (double d);

/* cairo_gstate.c */
cairo_private cairo_status_t
_cairo_gstate_init (cairo_gstate_t  *gstate,
                cairo_surface_t *target);

cairo_private void
_cairo_gstate_fini (cairo_gstate_t *gstate);

cairo_private cairo_status_t
_cairo_gstate_save (cairo_gstate_t **gstate);

cairo_private cairo_status_t
_cairo_gstate_restore (cairo_gstate_t **gstate);

cairo_private cairo_bool_t
_cairo_gstate_is_redirected (cairo_gstate_t *gstate);

cairo_private cairo_status_t
_cairo_gstate_redirect_target (cairo_gstate_t *gstate, cairo_surface_t *child);

cairo_private cairo_surface_t *
_cairo_gstate_get_target (cairo_gstate_t *gstate);

cairo_private cairo_surface_t *
_cairo_gstate_get_parent_target (cairo_gstate_t *gstate);

cairo_private cairo_surface_t *
_cairo_gstate_get_original_target (cairo_gstate_t *gstate);

cairo_private cairo_clip_t *
_cairo_gstate_get_clip (cairo_gstate_t *gstate);

cairo_private cairo_status_t
_cairo_gstate_set_source (cairo_gstate_t *gstate, cairo_pattern_t *source);

cairo_private cairo_pattern_t *
_cairo_gstate_get_source (cairo_gstate_t *gstate);

cairo_private cairo_status_t
_cairo_gstate_set_operator (cairo_gstate_t *gstate, cairo_operator_t op);

cairo_private cairo_operator_t
_cairo_gstate_get_operator (cairo_gstate_t *gstate);

cairo_private cairo_status_t
_cairo_gstate_set_tolerance (cairo_gstate_t *gstate, double tolerance);

cairo_private double
_cairo_gstate_get_tolerance (cairo_gstate_t *gstate);

cairo_private cairo_status_t
_cairo_gstate_set_fill_rule (cairo_gstate_t *gstate, cairo_fill_rule_t fill_rule);

cairo_private cairo_fill_rule_t
_cairo_gstate_get_fill_rule (cairo_gstate_t *gstate);

cairo_private cairo_status_t
_cairo_gstate_set_line_width (cairo_gstate_t *gstate, double width);

cairo_private double
_cairo_gstate_get_line_width (cairo_gstate_t *gstate);

cairo_private cairo_status_t
_cairo_gstate_set_line_cap (cairo_gstate_t *gstate, cairo_line_cap_t line_cap);

cairo_private cairo_line_cap_t
_cairo_gstate_get_line_cap (cairo_gstate_t *gstate);

cairo_private cairo_status_t
_cairo_gstate_set_line_join (cairo_gstate_t *gstate, cairo_line_join_t line_join);

cairo_private cairo_line_join_t
_cairo_gstate_get_line_join (cairo_gstate_t *gstate);

cairo_private cairo_status_t
_cairo_gstate_set_dash (cairo_gstate_t *gstate, const double *dash, int num_dashes, double offset);

cairo_private void
_cairo_gstate_get_dash (cairo_gstate_t *gstate, double *dash, int *num_dashes, double *offset);

cairo_private cairo_status_t
_cairo_gstate_set_miter_limit (cairo_gstate_t *gstate, double limit);

cairo_private double
_cairo_gstate_get_miter_limit (cairo_gstate_t *gstate);

cairo_private void
_cairo_gstate_get_matrix (cairo_gstate_t *gstate, cairo_matrix_t *matrix);

cairo_private cairo_status_t
_cairo_gstate_translate (cairo_gstate_t *gstate, double tx, double ty);

cairo_private cairo_status_t
_cairo_gstate_scale (cairo_gstate_t *gstate, double sx, double sy);

cairo_private cairo_status_t
_cairo_gstate_rotate (cairo_gstate_t *gstate, double angle);

cairo_private cairo_status_t
_cairo_gstate_transform (cairo_gstate_t         *gstate,
                   const cairo_matrix_t *matrix);

cairo_private cairo_status_t
_cairo_gstate_set_matrix (cairo_gstate_t       *gstate,
                    const cairo_matrix_t *matrix);

cairo_private void
_cairo_gstate_identity_matrix (cairo_gstate_t *gstate);

cairo_private void
_cairo_gstate_user_to_device (cairo_gstate_t *gstate, double *x, double *y);

cairo_private void
_cairo_gstate_user_to_device_distance (cairo_gstate_t *gstate, double *dx, double *dy);

cairo_private void
_cairo_gstate_device_to_user (cairo_gstate_t *gstate, double *x, double *y);

cairo_private void
_cairo_gstate_device_to_user_distance (cairo_gstate_t *gstate, double *dx, double *dy);

cairo_private void
_cairo_gstate_user_to_backend (cairo_gstate_t *gstate, double *x, double *y);

cairo_private void
_cairo_gstate_backend_to_user (cairo_gstate_t *gstate, double *x, double *y);

cairo_private void
_cairo_gstate_backend_to_user_rectangle (cairo_gstate_t *gstate,
                                         double *x1, double *y1,
                                         double *x2, double *y2,
                                         cairo_bool_t *is_tight);

cairo_private cairo_status_t
_cairo_gstate_path_extents (cairo_gstate_t     *gstate,
                      cairo_path_fixed_t *path,
                      double *x1, double *y1,
                      double *x2, double *y2);

cairo_private cairo_status_t
_cairo_gstate_paint (cairo_gstate_t *gstate);

cairo_private cairo_status_t
_cairo_gstate_mask (cairo_gstate_t  *gstate,
                cairo_pattern_t *mask);

cairo_private cairo_status_t
_cairo_gstate_stroke (cairo_gstate_t *gstate, cairo_path_fixed_t *path);

cairo_private cairo_status_t
_cairo_gstate_fill (cairo_gstate_t *gstate, cairo_path_fixed_t *path);

cairo_private cairo_status_t
_cairo_gstate_copy_page (cairo_gstate_t *gstate);

cairo_private cairo_status_t
_cairo_gstate_show_page (cairo_gstate_t *gstate);

cairo_private cairo_status_t
_cairo_gstate_stroke_extents (cairo_gstate_t     *gstate,
                        cairo_path_fixed_t *path,
                              double *x1, double *y1,
                        double *x2, double *y2);

cairo_private cairo_status_t
_cairo_gstate_fill_extents (cairo_gstate_t     *gstate,
                      cairo_path_fixed_t *path,
                            double *x1, double *y1,
                      double *x2, double *y2);

cairo_private cairo_status_t
_cairo_gstate_in_stroke (cairo_gstate_t       *gstate,
                   cairo_path_fixed_t *path,
                   double                x,
                   double                y,
                   cairo_bool_t         *inside_ret);

cairo_private cairo_status_t
_cairo_gstate_in_fill (cairo_gstate_t       *gstate,
                   cairo_path_fixed_t *path,
                   double              x,
                   double              y,
                   cairo_bool_t       *inside_ret);

cairo_private cairo_status_t
_cairo_gstate_clip (cairo_gstate_t *gstate, cairo_path_fixed_t *path);

cairo_private cairo_status_t
_cairo_gstate_reset_clip (cairo_gstate_t *gstate);

cairo_private cairo_status_t
_cairo_gstate_clip_extents (cairo_gstate_t *gstate,
                        double         *x1,
                        double         *y1,
                      double         *x2,
                      double         *y2);

cairo_private cairo_rectangle_list_t*
_cairo_gstate_copy_clip_rectangle_list (cairo_gstate_t *gstate);

cairo_private cairo_status_t
_cairo_gstate_show_surface (cairo_gstate_t      *gstate,
                      cairo_surface_t     *surface,
                      double         x,
                      double         y,
                      double        width,
                      double        height);

cairo_private cairo_status_t
_cairo_gstate_select_font_face (cairo_gstate_t *gstate,
                        const char *family,
                        cairo_font_slant_t slant,
                        cairo_font_weight_t weight);

cairo_private cairo_status_t
_cairo_gstate_set_font_size (cairo_gstate_t *gstate,
                       double          size);

cairo_private void
_cairo_gstate_get_font_matrix (cairo_gstate_t *gstate,
                         cairo_matrix_t *matrix);

cairo_private cairo_status_t
_cairo_gstate_set_font_matrix (cairo_gstate_t       *gstate,
                         const cairo_matrix_t *matrix);

cairo_private void
_cairo_gstate_get_font_options (cairo_gstate_t       *gstate,
                        cairo_font_options_t *options);

cairo_private void
_cairo_gstate_set_font_options (cairo_gstate_t             *gstate,
                        const cairo_font_options_t *options);

cairo_private cairo_status_t
_cairo_gstate_get_font_face (cairo_gstate_t     *gstate,
                       cairo_font_face_t **font_face);

cairo_private cairo_status_t
_cairo_gstate_get_scaled_font (cairo_gstate_t       *gstate,
                         cairo_scaled_font_t **scaled_font);

cairo_private cairo_status_t
_cairo_gstate_get_font_extents (cairo_gstate_t *gstate,
                        cairo_font_extents_t *extents);

cairo_private cairo_status_t
_cairo_gstate_set_font_face (cairo_gstate_t    *gstate,
                       cairo_font_face_t *font_face);

cairo_private cairo_status_t
_cairo_gstate_text_to_glyphs (cairo_gstate_t *font,
                        const char     *utf8,
                        double            x,
                        double            y,
                        cairo_glyph_t **glyphs,
                        int        *num_glyphs);

cairo_private cairo_status_t
_cairo_gstate_glyph_extents (cairo_gstate_t *gstate,
                       const cairo_glyph_t *glyphs,
                       int num_glyphs,
                       cairo_text_extents_t *extents);

cairo_private cairo_status_t
_cairo_gstate_show_glyphs (cairo_gstate_t *gstate,
                     const cairo_glyph_t *glyphs,
                     int num_glyphs);

cairo_private cairo_status_t
_cairo_gstate_glyph_path (cairo_gstate_t      *gstate,
                    const cairo_glyph_t *glyphs,
                    int              num_glyphs,
                    cairo_path_fixed_t  *path);

cairo_private cairo_bool_t
_cairo_operator_bounded_by_mask (cairo_operator_t op);

cairo_private cairo_bool_t
_cairo_operator_bounded_by_source (cairo_operator_t op);

/* cairo_color.c */
cairo_private const cairo_color_t *
_cairo_stock_color (cairo_stock_t stock);

#define CAIRO_COLOR_WHITE       _cairo_stock_color (CAIRO_STOCK_WHITE)
#define CAIRO_COLOR_BLACK       _cairo_stock_color (CAIRO_STOCK_BLACK)
#define CAIRO_COLOR_TRANSPARENT _cairo_stock_color (CAIRO_STOCK_TRANSPARENT)

cairo_private uint16_t
_cairo_color_double_to_short (double d);

cairo_private void
_cairo_color_init (cairo_color_t *color);

cairo_private void
_cairo_color_init_rgb (cairo_color_t *color,
                   double red, double green, double blue);

cairo_private void
_cairo_color_init_rgba (cairo_color_t *color,
                  double red, double green, double blue,
                  double alpha);

cairo_private void
_cairo_color_multiply_alpha (cairo_color_t *color,
                       double     alpha);

cairo_private void
_cairo_color_get_rgba (cairo_color_t *color,
                   double          *red,
                   double          *green,
                   double          *blue,
                   double          *alpha);

cairo_private void
_cairo_color_get_rgba_premultiplied (cairo_color_t *color,
                             double    *red,
                             double    *green,
                             double    *blue,
                             double    *alpha);

cairo_private cairo_bool_t
_cairo_color_equal (const cairo_color_t *color_a,
                    const cairo_color_t *color_b);

/* cairo-font-face.c */

cairo_private void
_cairo_scaled_font_freeze_cache (cairo_scaled_font_t *scaled_font);

cairo_private void
_cairo_scaled_font_thaw_cache (cairo_scaled_font_t *scaled_font);

cairo_private void
_cairo_scaled_font_reset_cache (cairo_scaled_font_t *scaled_font);

cairo_private cairo_status_t
_cairo_scaled_font_set_error (cairo_scaled_font_t *scaled_font,
                        cairo_status_t status);

cairo_private cairo_scaled_font_t *
_cairo_scaled_font_create_in_error (cairo_status_t status);

cairo_private void
_cairo_scaled_font_reset_static_data (void);

extern const cairo_private cairo_font_face_t _cairo_font_face_nil;

cairo_private void
_cairo_font_face_init (cairo_font_face_t               *font_face,
                   const cairo_font_face_backend_t *backend);

cairo_private cairo_status_t
_cairo_font_face_set_error (cairo_font_face_t *font_face,
                          cairo_status_t     status);

cairo_private cairo_font_face_t *
_cairo_toy_font_face_create (const char           *family,
                       cairo_font_slant_t    slant,
                       cairo_font_weight_t   weight);

cairo_private void
_cairo_unscaled_font_init (cairo_unscaled_font_t               *font,
                     const cairo_unscaled_font_backend_t *backend);

cairo_private_no_warn cairo_unscaled_font_t *
_cairo_unscaled_font_reference (cairo_unscaled_font_t *font);

cairo_private void
_cairo_unscaled_font_destroy (cairo_unscaled_font_t *font);

/* cairo-font-options.c */

cairo_private void
_cairo_font_options_init_default (cairo_font_options_t *options);

cairo_private void
_cairo_font_options_init_copy (cairo_font_options_t         *options,
                         const cairo_font_options_t   *other);

/* cairo_hull.c */
cairo_private cairo_status_t
_cairo_hull_compute (cairo_pen_vertex_t *vertices, int *num_vertices);

/* cairo-lzw.c */
cairo_private unsigned char *
_cairo_lzw_compress (unsigned char *data, unsigned long *size_in_out);

/* cairo_path.c */
cairo_private void
_cairo_path_fixed_init (cairo_path_fixed_t *path);

cairo_private cairo_status_t
_cairo_path_fixed_init_copy (cairo_path_fixed_t *path,
                       cairo_path_fixed_t *other);

cairo_private cairo_bool_t
_cairo_path_fixed_is_equal (cairo_path_fixed_t *path,
                      cairo_path_fixed_t *other);

cairo_private cairo_path_fixed_t *
_cairo_path_fixed_create (void);

cairo_private void
_cairo_path_fixed_fini (cairo_path_fixed_t *path);

cairo_private void
_cairo_path_fixed_destroy (cairo_path_fixed_t *path);

cairo_private cairo_status_t
_cairo_path_fixed_move_to (cairo_path_fixed_t  *path,
                     cairo_fixed_t  x,
                     cairo_fixed_t  y);

cairo_private void
_cairo_path_fixed_new_sub_path (cairo_path_fixed_t *path);

cairo_private cairo_status_t
_cairo_path_fixed_rel_move_to (cairo_path_fixed_t *path,
                         cairo_fixed_t       dx,
                         cairo_fixed_t       dy);

cairo_private cairo_status_t
_cairo_path_fixed_line_to (cairo_path_fixed_t *path,
                     cairo_fixed_t  x,
                     cairo_fixed_t  y);

cairo_private cairo_status_t
_cairo_path_fixed_rel_line_to (cairo_path_fixed_t *path,
                         cairo_fixed_t       dx,
                         cairo_fixed_t       dy);

cairo_private cairo_status_t
_cairo_path_fixed_curve_to (cairo_path_fixed_t  *path,
                      cairo_fixed_t x0, cairo_fixed_t y0,
                      cairo_fixed_t x1, cairo_fixed_t y1,
                      cairo_fixed_t x2, cairo_fixed_t y2);

cairo_private cairo_status_t
_cairo_path_fixed_rel_curve_to (cairo_path_fixed_t *path,
                        cairo_fixed_t dx0, cairo_fixed_t dy0,
                        cairo_fixed_t dx1, cairo_fixed_t dy1,
                        cairo_fixed_t dx2, cairo_fixed_t dy2);

cairo_private cairo_status_t
_cairo_path_fixed_close_path (cairo_path_fixed_t *path);

cairo_private cairo_bool_t
_cairo_path_fixed_get_current_point (cairo_path_fixed_t *path,
                             cairo_fixed_t      *x,
                             cairo_fixed_t      *y);

typedef cairo_status_t
(cairo_path_fixed_move_to_func_t) (void          *closure,
                           cairo_point_t *point);

typedef cairo_status_t
(cairo_path_fixed_line_to_func_t) (void          *closure,
                           cairo_point_t *point);

typedef cairo_status_t
(cairo_path_fixed_curve_to_func_t) (void    *closure,
                            cairo_point_t *p0,
                            cairo_point_t *p1,
                            cairo_point_t *p2);

typedef cairo_status_t
(cairo_path_fixed_close_path_func_t) (void *closure);

cairo_private cairo_status_t
_cairo_path_fixed_interpret (cairo_path_fixed_t         *path,
                   cairo_direction_t               dir,
                   cairo_path_fixed_move_to_func_t      *move_to,
                   cairo_path_fixed_line_to_func_t      *line_to,
                   cairo_path_fixed_curve_to_func_t     *curve_to,
                   cairo_path_fixed_close_path_func_t *close_path,
                   void                     *closure);

cairo_private cairo_status_t
_cairo_path_fixed_interpret_flat (cairo_path_fixed_t    *path,
                   cairo_direction_t               dir,
                   cairo_path_fixed_move_to_func_t      *move_to,
                   cairo_path_fixed_line_to_func_t      *line_to,
                   cairo_path_fixed_close_path_func_t *close_path,
                   void                     *closure,
                   double                         tolerance);

cairo_private cairo_status_t
_cairo_path_fixed_bounds (cairo_path_fixed_t *path,
                    double *x1, double *y1,
                    double *x2, double *y2,
                    double tolerance);

cairo_private void
_cairo_path_fixed_device_transform (cairo_path_fixed_t      *path,
                            cairo_matrix_t      *device_transform);

cairo_private cairo_bool_t
_cairo_path_fixed_is_empty (cairo_path_fixed_t *path);

cairo_private cairo_bool_t
_cairo_path_fixed_is_box (cairo_path_fixed_t *path,
                          cairo_box_t *box);

cairo_private cairo_bool_t
_cairo_path_fixed_is_rectangle (cairo_path_fixed_t *path,
                        cairo_box_t        *box);

/* cairo_path_fill.c */
cairo_private cairo_status_t
_cairo_path_fixed_fill_to_traps (cairo_path_fixed_t *path,
                         cairo_fill_rule_t   fill_rule,
                         double              tolerance,
                         cairo_traps_t      *traps);

/* cairo_path_stroke.c */
cairo_private cairo_status_t
_cairo_path_fixed_stroke_to_traps (cairo_path_fixed_t *path,
                           cairo_stroke_style_t *stroke_style,
                           cairo_matrix_t *ctm,
                           cairo_matrix_t *ctm_inverse,
                           double          tolerance,
                           cairo_traps_t  *traps);

/* cairo-scaled-font.c */

cairo_private cairo_status_t
_cairo_scaled_font_init (cairo_scaled_font_t               *scaled_font,
                   cairo_font_face_t               *font_face,
                   const cairo_matrix_t              *font_matrix,
                   const cairo_matrix_t              *ctm,
                   const cairo_font_options_t      *options,
                   const cairo_scaled_font_backend_t *backend);

cairo_private cairo_status_t
_cairo_scaled_font_set_metrics (cairo_scaled_font_t       *scaled_font,
                        cairo_font_extents_t        *fs_metrics);

cairo_private void
_cairo_scaled_font_fini (cairo_scaled_font_t *scaled_font);

cairo_private cairo_status_t
_cairo_scaled_font_font_extents (cairo_scaled_font_t  *scaled_font,
                         cairo_font_extents_t *extents);

cairo_private cairo_status_t
_cairo_scaled_font_text_to_glyphs (cairo_scaled_font_t      *scaled_font,
                           double         x,
                           double         y,
                           const char           *utf8,
                           cairo_glyph_t       **glyphs,
                           int                    *num_glyphs);

cairo_private cairo_status_t
_cairo_scaled_font_glyph_device_extents (cairo_scaled_font_t       *scaled_font,
                               const cairo_glyph_t     *glyphs,
                               int                      num_glyphs,
                               cairo_rectangle_int_t   *extents);

cairo_private cairo_status_t
_cairo_scaled_font_show_glyphs (cairo_scaled_font_t *scaled_font,
                        cairo_operator_t     op,
                        cairo_pattern_t       *source,
                        cairo_surface_t       *surface,
                        int              source_x,
                        int              source_y,
                        int              dest_x,
                        int              dest_y,
                        unsigned int           width,
                        unsigned int           height,
                        cairo_glyph_t         *glyphs,
                        int              num_glyphs);

cairo_private cairo_status_t
_cairo_scaled_font_glyph_path (cairo_scaled_font_t *scaled_font,
                         const cairo_glyph_t *glyphs,
                         int                  num_glyphs,
                         cairo_path_fixed_t  *path);

cairo_private void
_cairo_scaled_glyph_set_metrics (cairo_scaled_glyph_t *scaled_glyph,
                         cairo_scaled_font_t *scaled_font,
                         cairo_text_extents_t *fs_metrics);

cairo_private void
_cairo_scaled_glyph_set_surface (cairo_scaled_glyph_t *scaled_glyph,
                         cairo_scaled_font_t *scaled_font,
                         cairo_image_surface_t *surface);

cairo_private void
_cairo_scaled_glyph_set_path (cairo_scaled_glyph_t *scaled_glyph,
                        cairo_scaled_font_t *scaled_font,
                        cairo_path_fixed_t *path);

cairo_private cairo_int_status_t
_cairo_scaled_glyph_lookup (cairo_scaled_font_t *scaled_font,
                      unsigned long index,
                      cairo_scaled_glyph_info_t info,
                      cairo_scaled_glyph_t **scaled_glyph_ret);

cairo_private void
_cairo_scaled_font_map_destroy (void);

/* cairo-stroke-style.c */

cairo_private void
_cairo_stroke_style_init (cairo_stroke_style_t *style);

cairo_private cairo_status_t
_cairo_stroke_style_init_copy (cairo_stroke_style_t *style,
                         cairo_stroke_style_t *other);

cairo_private void
_cairo_stroke_style_fini (cairo_stroke_style_t *style);

cairo_private void
_cairo_stroke_style_max_distance_from_path (const cairo_stroke_style_t *style,
                                            const cairo_matrix_t *ctm,
                                            double *dx, double *dy);

/* cairo-surface.c */

cairo_private cairo_surface_t *
_cairo_surface_create_in_error (cairo_status_t status);

cairo_private cairo_status_t
_cairo_surface_set_error (cairo_surface_t *surface,
                    cairo_status_t   status);

cairo_private void
_cairo_surface_set_resolution (cairo_surface_t *surface,
                               double x_res,
                               double y_res);

cairo_private cairo_surface_t *
_cairo_surface_create_similar_scratch (cairo_surface_t *other,
                               cairo_content_t  content,
                               int        width,
                               int        height);

/* Note: the color_pattern argument is optional - if provided it will reuse
 * that pattern instead of creating a very short-lived fresh solid pattern
 */
cairo_private cairo_surface_t *
_cairo_surface_create_similar_solid (cairo_surface_t   *other,
                             cairo_content_t      content,
                             int            width,
                             int            height,
                             const cairo_color_t *color,
                             cairo_pattern_t     *color_pattern);

cairo_private void
_cairo_surface_init (cairo_surface_t                  *surface,
                 const cairo_surface_backend_t  *backend,
                 cairo_content_t                 content);

cairo_private void
_cairo_surface_set_font_options (cairo_surface_t       *surface,
                         cairo_font_options_t  *options);

cairo_private cairo_clip_mode_t
_cairo_surface_get_clip_mode (cairo_surface_t *surface);

cairo_private cairo_status_t
_cairo_surface_composite (cairo_operator_t      op,
                    cairo_pattern_t *src,
                    cairo_pattern_t *mask,
                    cairo_surface_t *dst,
                    int             src_x,
                    int             src_y,
                    int             mask_x,
                    int             mask_y,
                    int             dst_x,
                    int             dst_y,
                    unsigned int          width,
                    unsigned int          height);

cairo_private cairo_status_t
_cairo_surface_fill_rectangle (cairo_surface_t     *surface,
                         cairo_operator_t     op,
                         const cairo_color_t *color,
                         int            x,
                         int            y,
                         int            width,
                         int            height);

cairo_private cairo_status_t
_cairo_surface_fill_region (cairo_surface_t        *surface,
                      cairo_operator_t        op,
                      const cairo_color_t    *color,
                      cairo_region_t         *region);

cairo_private cairo_status_t
_cairo_surface_fill_rectangles (cairo_surface_t       *surface,
                        cairo_operator_t         op,
                        const cairo_color_t     *color,
                        cairo_rectangle_int_t   *rects,
                        int                num_rects);

cairo_private cairo_status_t
_cairo_surface_paint (cairo_surface_t     *surface,
                  cairo_operator_t   op,
                  cairo_pattern_t   *source);

cairo_private cairo_status_t
_cairo_surface_mask (cairo_surface_t      *surface,
                 cairo_operator_t    op,
                 cairo_pattern_t    *source,
                 cairo_pattern_t    *mask);

cairo_private cairo_status_t
_cairo_surface_fill_stroke (cairo_surface_t         *surface,
                      cairo_operator_t         fill_op,
                      cairo_pattern_t         *fill_source,
                      cairo_fill_rule_t        fill_rule,
                      double             fill_tolerance,
                      cairo_antialias_t        fill_antialias,
                      cairo_path_fixed_t      *path,
                      cairo_operator_t         stroke_op,
                      cairo_pattern_t         *stroke_source,
                      cairo_stroke_style_t    *stroke_style,
                      cairo_matrix_t          *stroke_ctm,
                      cairo_matrix_t          *stroke_ctm_inverse,
                      double             stroke_tolerance,
                      cairo_antialias_t        stroke_antialias);

cairo_private cairo_status_t
_cairo_surface_stroke (cairo_surface_t          *surface,
                   cairo_operator_t        op,
                   cairo_pattern_t        *source,
                   cairo_path_fixed_t     *path,
                   cairo_stroke_style_t   *style,
                   cairo_matrix_t         *ctm,
                   cairo_matrix_t         *ctm_inverse,
                   double                  tolerance,
                   cairo_antialias_t       antialias);

cairo_private cairo_status_t
_cairo_surface_fill (cairo_surface_t      *surface,
                 cairo_operator_t    op,
                 cairo_pattern_t    *source,
                 cairo_path_fixed_t *path,
                 cairo_fill_rule_t   fill_rule,
                 double        tolerance,
                 cairo_antialias_t   antialias);

cairo_private cairo_status_t
_cairo_surface_show_glyphs (cairo_surface_t     *surface,
                      cairo_operator_t     op,
                      cairo_pattern_t     *source,
                      cairo_glyph_t *glyphs,
                      int                  num_glyphs,
                      cairo_scaled_font_t *scaled_font);

cairo_private cairo_status_t
_cairo_surface_composite_trapezoids (cairo_operator_t op,
                             cairo_pattern_t    *pattern,
                             cairo_surface_t    *dst,
                             cairo_antialias_t  antialias,
                             int          src_x,
                             int          src_y,
                             int          dst_x,
                             int          dst_y,
                             unsigned int width,
                             unsigned int height,
                             cairo_trapezoid_t  *traps,
                             int          ntraps);

cairo_private cairo_status_t
_cairo_surface_acquire_source_image (cairo_surface_t         *surface,
                             cairo_image_surface_t  **image_out,
                             void                   **image_extra);

cairo_private void
_cairo_surface_release_source_image (cairo_surface_t        *surface,
                             cairo_image_surface_t  *image,
                             void                   *image_extra);

cairo_private cairo_status_t
_cairo_surface_acquire_dest_image (cairo_surface_t         *surface,
                           cairo_rectangle_int_t   *interest_rect,
                           cairo_image_surface_t  **image_out,
                           cairo_rectangle_int_t   *image_rect,
                           void                   **image_extra);

cairo_private void
_cairo_surface_release_dest_image (cairo_surface_t        *surface,
                           cairo_rectangle_int_t  *interest_rect,
                           cairo_image_surface_t  *image,
                           cairo_rectangle_int_t  *image_rect,
                           void                   *image_extra);

cairo_private cairo_status_t
_cairo_surface_clone_similar (cairo_surface_t  *surface,
                        cairo_surface_t  *src,
                        int               src_x,
                        int               src_y,
                        int               width,
                        int               height,
                        cairo_surface_t **clone_out);

cairo_private cairo_surface_t *
_cairo_surface_snapshot (cairo_surface_t *surface);

cairo_private cairo_bool_t
_cairo_surface_is_similar (cairo_surface_t *surface_a,
                         cairo_surface_t *surface_b,
                     cairo_content_t  content);

cairo_private cairo_status_t
_cairo_surface_reset (cairo_surface_t *surface);

cairo_private unsigned int
_cairo_surface_get_current_clip_serial (cairo_surface_t *surface);

cairo_private unsigned int
_cairo_surface_allocate_clip_serial (cairo_surface_t *surface);

cairo_private cairo_status_t
_cairo_surface_reset_clip (cairo_surface_t *surface);

cairo_private cairo_status_t
_cairo_surface_set_clip_region (cairo_surface_t     *surface,
                        cairo_region_t      *region,
                        unsigned int          serial);

cairo_private cairo_int_status_t
_cairo_surface_intersect_clip_path (cairo_surface_t    *surface,
                            cairo_path_fixed_t *path,
                            cairo_fill_rule_t   fill_rule,
                            double        tolerance,
                            cairo_antialias_t   antialias);

cairo_private cairo_clip_t *
_cairo_surface_get_clip (cairo_surface_t *surface);

cairo_private cairo_status_t
_cairo_surface_set_clip (cairo_surface_t *surface, cairo_clip_t *clip);

cairo_private cairo_status_t
_cairo_surface_get_extents (cairo_surface_t         *surface,
                      cairo_rectangle_int_t   *rectangle);

cairo_private cairo_status_t
_cairo_surface_old_show_glyphs (cairo_scaled_font_t   *scaled_font,
                        cairo_operator_t   op,
                        cairo_pattern_t         *pattern,
                        cairo_surface_t         *surface,
                        int                source_x,
                        int                source_y,
                        int                dest_x,
                        int                dest_y,
                        unsigned int             width,
                        unsigned int             height,
                        cairo_glyph_t           *glyphs,
                        int                num_glyphs);

cairo_private cairo_status_t
_cairo_surface_composite_fixup_unbounded (cairo_surface_t            *dst,
                                cairo_surface_attributes_t *src_attr,
                                int                         src_width,
                                int                         src_height,
                                cairo_surface_attributes_t *mask_attr,
                                int                         mask_width,
                                int                         mask_height,
                                int                   src_x,
                                int                   src_y,
                                int                   mask_x,
                                int                   mask_y,
                                int                   dst_x,
                                int                   dst_y,
                                unsigned int                width,
                                unsigned int                height);

cairo_private cairo_status_t
_cairo_surface_composite_shape_fixup_unbounded (cairo_surface_t            *dst,
                                    cairo_surface_attributes_t *src_attr,
                                    int                         src_width,
                                    int                         src_height,
                                    int                         mask_width,
                                    int                         mask_height,
                                    int                   src_x,
                                    int                   src_y,
                                    int                   mask_x,
                                    int                   mask_y,
                                    int                   dst_x,
                                    int                   dst_y,
                                    unsigned int                width,
                                    unsigned int                height);

cairo_private cairo_bool_t
_cairo_surface_is_opaque (const cairo_surface_t *surface);

cairo_private void
_cairo_surface_set_device_scale (cairo_surface_t *surface,
                         double             sx,
                         double             sy);

cairo_private cairo_bool_t
_cairo_surface_has_device_transform (cairo_surface_t *surface);

/* cairo_image_surface.c */

/* XXX: In cairo 1.2.0 we added a new %CAIRO_FORMAT_RGB16_565 but
 * neglected to adjust this macro. The net effect is that it's
 * impossible to externally create an image surface with this
 * format. This is perhaps a good thing since we also neglected to fix
 * up things like cairo_surface_write_to_png() for the new format
 * (-Wswitch-enum will tell you where). Is it obvious that format was
 * added in haste?
 *
 * The reason for the new format was to allow the xlib backend to be
 * used on X servers with a 565 visual. So the new format did its job
 * for that, even without being considered "valid" for the sake of
 * things like cairo_image_surface_create().
 *
 * Since 1.2.0 we ran into the same situtation with X servers with BGR
 * visuals. This time we invented #cairo_internal_format_t instead,
 * (see it for more discussion).
 *
 * The punchline is that %CAIRO_FORMAT_VALID must not conside any
 * internal format to be valid. Also we need to decide if the
 * RGB16_565 should be moved to instead be an internal format. If so,
 * this macro need not change for it. (We probably will need to leave
 * an RGB16_565 value in the header files for the sake of code that
 * might have that value in it.)
 *
 * If we do decide to start fully supporting RGB16_565 as an external
 * format, then %CAIRO_FORMAT_VALID needs to be adjusted to include
 * it. But that should not happen before all necessary code is fixed
 * to support it (at least cairo_surface_write_to_png() and a few spots
 * in cairo-xlib-surface.c--again see -Wswitch-enum).
 */
#define CAIRO_FORMAT_INVALID ((unsigned int) -1)
#define CAIRO_FORMAT_VALID(format) ((format) <= CAIRO_FORMAT_A1)

/* pixman-required stride alignment in bytes. */
#define CAIRO_STRIDE_ALIGNMENT (sizeof (uint32_t))
#define CAIRO_STRIDE_FOR_WIDTH_BPP(w,bpp) \
   (((bpp)*(w)+7)/8 + CAIRO_STRIDE_ALIGNMENT-1) & ~(CAIRO_STRIDE_ALIGNMENT-1)

#define CAIRO_CONTENT_VALID(content) ((content) &&                         \
                              (((content) & ~(CAIRO_CONTENT_COLOR |      \
                                          CAIRO_CONTENT_ALPHA |      \
                                          CAIRO_CONTENT_COLOR_ALPHA))\
                               == 0))

cairo_private int
_cairo_format_bits_per_pixel (cairo_format_t format);

cairo_private cairo_format_t
_cairo_format_from_content (cairo_content_t content);

cairo_private cairo_content_t
_cairo_content_from_format (cairo_format_t format);

cairo_private cairo_surface_t *
_cairo_image_surface_create_for_pixman_image (pixman_image_t            *pixman_image,
                                    pixman_format_code_t     pixman_format);

cairo_private cairo_int_status_t
_pixman_format_from_masks (cairo_format_masks_t *masks,
                     pixman_format_code_t *format_ret);

cairo_private void
_pixman_format_to_masks (pixman_format_code_t    pixman_format,
                   cairo_format_masks_t   *masks);

cairo_private cairo_surface_t *
_cairo_image_surface_create_with_pixman_format (unsigned char           *data,
                                    pixman_format_code_t     pixman_format,
                                    int                width,
                                    int                height,
                                    int                stride);

cairo_private cairo_surface_t *
_cairo_image_surface_create_with_masks (unsigned char        *data,
                              cairo_format_masks_t   *format,
                              int               width,
                              int               height,
                              int               stride);

cairo_private cairo_surface_t *
_cairo_image_surface_create_with_content (cairo_content_t   content,
                                int             width,
                                int             height);

cairo_private cairo_surface_t *
_cairo_image_surface_create_for_data_with_content (unsigned char  *data,
                                       cairo_content_t       content,
                                       int                   width,
                                       int                   height,
                                       int                   stride);

cairo_private void
_cairo_image_surface_assume_ownership_of_data (cairo_image_surface_t *surface);

/* XXX: It's a nasty kludge that this appears here. Backend functions
 * like this should really be static. But we're doing this to work
 * around some general defects in the backend clipping interfaces,
 * (see some notes in test-paginated-surface.c).
 *
 * I want to fix the real defects, but it's "hard" as they touch many
 * backends, so doing that will require synchronizing several backend
 * maintainers.
 */
cairo_private cairo_int_status_t
_cairo_image_surface_set_clip_region (void *abstract_surface,
                              cairo_region_t *region);

cairo_private cairo_image_surface_t *
_cairo_image_surface_clone (cairo_image_surface_t     *surface,
                      cairo_format_t             format);

cairo_private cairo_image_transparency_t
_cairo_image_analyze_transparency (cairo_image_surface_t      *image);

cairo_private cairo_bool_t
_cairo_surface_is_image (const cairo_surface_t *surface);

cairo_private cairo_bool_t
_cairo_surface_is_meta (const cairo_surface_t *surface);

/* cairo_pen.c */
cairo_private cairo_status_t
_cairo_pen_init (cairo_pen_t  *pen,
             double            radius,
             double            tolerance,
             cairo_matrix_t   *ctm);

cairo_private void
_cairo_pen_init_empty (cairo_pen_t *pen);

cairo_private cairo_status_t
_cairo_pen_init_copy (cairo_pen_t *pen, cairo_pen_t *other);

cairo_private void
_cairo_pen_fini (cairo_pen_t *pen);

cairo_private cairo_status_t
_cairo_pen_add_points (cairo_pen_t *pen, cairo_point_t *point, int num_points);

cairo_private cairo_status_t
_cairo_pen_add_points_for_slopes (cairo_pen_t *pen,
                          cairo_point_t *a,
                          cairo_point_t *b,
                          cairo_point_t *c,
                          cairo_point_t *d);

cairo_private void
_cairo_pen_find_active_cw_vertex_index (cairo_pen_t *pen,
                              cairo_slope_t *slope,
                              int *active);

cairo_private void
_cairo_pen_find_active_ccw_vertex_index (cairo_pen_t *pen,
                               cairo_slope_t *slope,
                               int *active);

cairo_private cairo_status_t
_cairo_pen_stroke_spline (cairo_pen_t *pen,
                    cairo_spline_t *spline,
                    double tolerance,
                    cairo_traps_t *traps);

/* cairo_polygon.c */
cairo_private void
_cairo_polygon_init (cairo_polygon_t *polygon);

cairo_private void
_cairo_polygon_fini (cairo_polygon_t *polygon);

cairo_private cairo_status_t
_cairo_polygon_status (cairo_polygon_t *polygon);

cairo_private void
_cairo_polygon_add_edge (cairo_polygon_t *polygon, cairo_point_t *p1, cairo_point_t *p2);

cairo_private void
_cairo_polygon_move_to (cairo_polygon_t *polygon, cairo_point_t *point);

cairo_private void
_cairo_polygon_line_to (cairo_polygon_t *polygon, cairo_point_t *point);

cairo_private void
_cairo_polygon_close (cairo_polygon_t *polygon);

/* cairo_spline.c */
cairo_private cairo_int_status_t
_cairo_spline_init (cairo_spline_t *spline,
                const cairo_point_t *a,
                const cairo_point_t *b,
                const cairo_point_t *c,
                const cairo_point_t *d);

cairo_private cairo_status_t
_cairo_spline_decompose (cairo_spline_t *spline, double tolerance);

cairo_private void
_cairo_spline_fini (cairo_spline_t *spline);

/* cairo_matrix.c */
cairo_private void
_cairo_matrix_get_affine (const cairo_matrix_t *matrix,
                    double *xx, double *yx,
                    double *xy, double *yy,
                    double *x0, double *y0);

cairo_private void
_cairo_matrix_transform_bounding_box (const cairo_matrix_t *matrix,
                              double *x1, double *y1,
                              double *x2, double *y2,
                              cairo_bool_t *is_tight);

cairo_private cairo_bool_t
_cairo_matrix_is_invertible (const cairo_matrix_t *matrix);

cairo_private void
_cairo_matrix_compute_determinant (const cairo_matrix_t *matrix, double *det);

cairo_private cairo_status_t
_cairo_matrix_compute_scale_factors (const cairo_matrix_t *matrix,
                             double *sx, double *sy, int x_major);

cairo_private cairo_bool_t
_cairo_matrix_is_identity (const cairo_matrix_t *matrix);

cairo_private cairo_bool_t
_cairo_matrix_is_translation (const cairo_matrix_t *matrix);

cairo_private cairo_bool_t
_cairo_matrix_is_integer_translation(const cairo_matrix_t *matrix,
                             int *itx, int *ity);

cairo_private double
_cairo_matrix_transformed_circle_major_axis(cairo_matrix_t *matrix, double radius);

cairo_private void
_cairo_matrix_to_pixman_matrix (const cairo_matrix_t  *matrix,
                        pixman_transform_t      *pixman_transform);

/* cairo_traps.c */
cairo_private void
_cairo_traps_init (cairo_traps_t *traps);

cairo_private void
_cairo_traps_limit (cairo_traps_t   *traps,
                cairo_box_t         *limits);

cairo_private cairo_bool_t
_cairo_traps_get_limit (cairo_traps_t *traps,
                        cairo_box_t   *limits);

cairo_private cairo_status_t
_cairo_traps_init_box (cairo_traps_t *traps,
                   cairo_box_t   *box);

cairo_private void
_cairo_traps_fini (cairo_traps_t *traps);

cairo_private cairo_status_t
_cairo_traps_status (cairo_traps_t *traps);

cairo_private void
_cairo_traps_translate (cairo_traps_t *traps, int x, int y);

cairo_private cairo_status_t
_cairo_traps_tessellate_triangle (cairo_traps_t *traps, cairo_point_t t[3]);

cairo_private cairo_status_t
_cairo_traps_tessellate_convex_quad (cairo_traps_t *traps, cairo_point_t q[4]);

cairo_private cairo_status_t
_cairo_traps_tessellate_polygon (cairo_traps_t *traps,
                         cairo_polygon_t *poly,
                         cairo_fill_rule_t fill_rule);

cairo_private void
_cairo_traps_add_trap_from_points (cairo_traps_t *traps, cairo_fixed_t top, cairo_fixed_t bottom,
                           cairo_point_t left_p1, cairo_point_t left_p2,
                           cairo_point_t right_p1, cairo_point_t right_p2);

cairo_private cairo_status_t
_cairo_bentley_ottmann_tessellate_polygon (cairo_traps_t      *traps,
                                 cairo_polygon_t      *polygon,
                                 cairo_fill_rule_t     fill_rule);

cairo_private int
_cairo_traps_contain (cairo_traps_t *traps, double x, double y);

cairo_private void
_cairo_traps_extents (cairo_traps_t *traps, cairo_box_t *extents);

cairo_private cairo_int_status_t
_cairo_traps_extract_region (cairo_traps_t     *tr,
                       cairo_region_t *region);

cairo_private void
_cairo_trapezoid_array_translate_and_scale (cairo_trapezoid_t *offset_traps,
                                  cairo_trapezoid_t *src_traps,
                                  int num_traps,
                                  double tx, double ty,
                                  double sx, double sy);

/* cairo_slope.c */
cairo_private void
_cairo_slope_init (cairo_slope_t *slope, cairo_point_t *a, cairo_point_t *b);

cairo_private int
_cairo_slope_compare (cairo_slope_t *a, cairo_slope_t *b);

/* cairo_pattern.c */

cairo_private cairo_status_t
_cairo_pattern_create_copy (cairo_pattern_t       **pattern,
                      const cairo_pattern_t  *other);

cairo_private cairo_status_t
_cairo_pattern_init_copy (cairo_pattern_t *pattern,
                    const cairo_pattern_t *other);

cairo_private void
_cairo_pattern_init_solid (cairo_solid_pattern_t      *pattern,
                     const cairo_color_t        *color,
                     cairo_content_t             content);

cairo_private void
_cairo_pattern_init_for_surface (cairo_surface_pattern_t *pattern,
                         cairo_surface_t *surface);

cairo_private void
_cairo_pattern_init_linear (cairo_linear_pattern_t *pattern,
                      double x0, double y0, double x1, double y1);

cairo_private void
_cairo_pattern_init_radial (cairo_radial_pattern_t *pattern,
                      double cx0, double cy0, double radius0,
                      double cx1, double cy1, double radius1);

cairo_private void
_cairo_pattern_fini (cairo_pattern_t *pattern);

cairo_private cairo_pattern_t *
_cairo_pattern_create_solid (const cairo_color_t      *color,
                       cairo_content_t           content);

cairo_private void
_cairo_pattern_transform (cairo_pattern_t      *pattern,
                    const cairo_matrix_t *ctm_inverse);

cairo_private cairo_bool_t
_cairo_pattern_is_opaque_solid (const cairo_pattern_t *pattern);

cairo_private cairo_bool_t
_cairo_pattern_is_opaque (const cairo_pattern_t *abstract_pattern);

cairo_private cairo_int_status_t
_cairo_pattern_acquire_surface (cairo_pattern_t          *pattern,
                        cairo_surface_t            *dst,
                        int                  x,
                        int                  y,
                        unsigned int               width,
                        unsigned int               height,
                        cairo_surface_t            **surface_out,
                        cairo_surface_attributes_t *attributes);

cairo_private void
_cairo_pattern_release_surface (cairo_pattern_t          *pattern,
                        cairo_surface_t            *surface,
                        cairo_surface_attributes_t *attributes);

cairo_private cairo_int_status_t
_cairo_pattern_acquire_surfaces (cairo_pattern_t          *src,
                         cairo_pattern_t      *mask,
                         cairo_surface_t      *dst,
                         int                  src_x,
                         int                  src_y,
                         int                  mask_x,
                         int                  mask_y,
                         unsigned int               width,
                         unsigned int               height,
                         cairo_surface_t      **src_out,
                         cairo_surface_t      **mask_out,
                         cairo_surface_attributes_t *src_attributes,
                         cairo_surface_attributes_t *mask_attributes);

cairo_private cairo_status_t
_cairo_pattern_get_extents (cairo_pattern_t         *pattern,
                      cairo_rectangle_int_t   *extents);

cairo_private void
_cairo_pattern_reset_static_data (void);

cairo_private cairo_status_t
_cairo_gstate_set_antialias (cairo_gstate_t *gstate,
                       cairo_antialias_t antialias);

cairo_private cairo_antialias_t
_cairo_gstate_get_antialias (cairo_gstate_t *gstate);

/* cairo-region.c */

#include "cairo-region-private.h"

/* cairo_unicode.c */

cairo_private cairo_status_t
_cairo_utf8_to_ucs4 (const unsigned char *str,
                 int            len,
                 uint32_t             **result,
                 int           *items_written);

#if CAIRO_HAS_WIN32_FONT+0 || CAIRO_HAS_QUARTZ_FONT+0
# define CAIRO_HAS_UTF8_TO_UTF16 1
#endif
#if CAIRO_HAS_UTF8_TO_UTF16
cairo_private cairo_status_t
_cairo_utf8_to_utf16 (const unsigned char *str,
                  int            len,
                  uint16_t           **result,
                  int           *items_written);
#endif

cairo_private cairo_status_t
_cairo_error (cairo_status_t status);

/* hide compiler warnings when discarding the return value */
#define _cairo_error_throw(status) do { \
    cairo_status_t status__ = _cairo_error (status); \
    (void) status__; \
} while (0)

/* Avoid unnecessary PLT entries.  */
slim_hidden_proto (cairo_clip_preserve);
slim_hidden_proto (cairo_close_path);
slim_hidden_proto (cairo_create);
slim_hidden_proto (cairo_curve_to);
slim_hidden_proto (cairo_destroy);
slim_hidden_proto (cairo_fill_preserve);
slim_hidden_proto (cairo_font_face_destroy);
slim_hidden_proto_no_warn (cairo_font_face_reference);
slim_hidden_proto (cairo_font_options_create);
slim_hidden_proto (cairo_font_options_destroy);
slim_hidden_proto (cairo_font_options_equal);
slim_hidden_proto (cairo_font_options_hash);
slim_hidden_proto (cairo_font_options_merge);
slim_hidden_proto (cairo_font_options_set_antialias);
slim_hidden_proto (cairo_font_options_set_hint_metrics);
slim_hidden_proto (cairo_font_options_set_hint_style);
slim_hidden_proto (cairo_font_options_set_subpixel_order);
slim_hidden_proto (cairo_font_options_status);
slim_hidden_proto (cairo_get_current_point);
slim_hidden_proto (cairo_get_matrix);
slim_hidden_proto (cairo_get_tolerance);
slim_hidden_proto (cairo_image_surface_create);
slim_hidden_proto (cairo_image_surface_create_for_data);
slim_hidden_proto (cairo_image_surface_get_data);
slim_hidden_proto (cairo_image_surface_get_height);
slim_hidden_proto (cairo_image_surface_get_stride);
slim_hidden_proto (cairo_image_surface_get_width);
slim_hidden_proto (cairo_format_stride_for_width);
slim_hidden_proto (cairo_line_to);
slim_hidden_proto (cairo_mask);
slim_hidden_proto (cairo_matrix_init);
slim_hidden_proto (cairo_matrix_init_identity);
slim_hidden_proto (cairo_matrix_init_rotate);
slim_hidden_proto (cairo_matrix_init_scale);
slim_hidden_proto (cairo_matrix_init_translate);
slim_hidden_proto (cairo_matrix_invert);
slim_hidden_proto (cairo_matrix_multiply);
slim_hidden_proto (cairo_matrix_scale);
slim_hidden_proto (cairo_matrix_transform_distance);
slim_hidden_proto (cairo_matrix_transform_point);
slim_hidden_proto (cairo_matrix_translate);
slim_hidden_proto (cairo_move_to);
slim_hidden_proto (cairo_new_path);
slim_hidden_proto (cairo_paint);
slim_hidden_proto (cairo_path_extents);
slim_hidden_proto (cairo_pattern_create_for_surface);
slim_hidden_proto (cairo_pattern_create_rgb);
slim_hidden_proto (cairo_pattern_create_rgba);
slim_hidden_proto (cairo_pattern_destroy);
slim_hidden_proto (cairo_pattern_get_extend);
slim_hidden_proto (cairo_pattern_get_type);
slim_hidden_proto_no_warn (cairo_pattern_reference);
slim_hidden_proto (cairo_pattern_set_matrix);
slim_hidden_proto (cairo_pattern_status);
slim_hidden_proto (cairo_pop_group);
slim_hidden_proto (cairo_pop_group_to_source);
slim_hidden_proto (cairo_push_group);
slim_hidden_proto (cairo_push_group_with_content);
slim_hidden_proto (cairo_rel_line_to);
slim_hidden_proto (cairo_restore);
slim_hidden_proto (cairo_save);
slim_hidden_proto (cairo_scale);
slim_hidden_proto (cairo_scaled_font_create);
slim_hidden_proto (cairo_scaled_font_destroy);
slim_hidden_proto (cairo_scaled_font_extents);
slim_hidden_proto (cairo_scaled_font_get_ctm);
slim_hidden_proto (cairo_scaled_font_get_font_face);
slim_hidden_proto (cairo_scaled_font_get_font_matrix);
slim_hidden_proto (cairo_scaled_font_get_font_options);
slim_hidden_proto (cairo_scaled_font_glyph_extents);
slim_hidden_proto_no_warn (cairo_scaled_font_reference);
slim_hidden_proto (cairo_scaled_font_status);
slim_hidden_proto (cairo_set_operator);
slim_hidden_proto (cairo_set_source);
slim_hidden_proto (cairo_set_source_surface);
slim_hidden_proto (cairo_status);
slim_hidden_proto (cairo_stroke_preserve);
slim_hidden_proto (cairo_surface_create_similar);
slim_hidden_proto (cairo_surface_destroy);
slim_hidden_proto (cairo_surface_finish);
slim_hidden_proto (cairo_surface_get_content);
slim_hidden_proto (cairo_surface_get_device_offset);
slim_hidden_proto (cairo_surface_get_font_options);
slim_hidden_proto (cairo_surface_get_type);
slim_hidden_proto (cairo_surface_mark_dirty_rectangle);
slim_hidden_proto_no_warn (cairo_surface_reference);
slim_hidden_proto (cairo_surface_set_device_offset);
slim_hidden_proto (cairo_surface_set_fallback_resolution);
slim_hidden_proto (cairo_surface_copy_page);
slim_hidden_proto (cairo_surface_show_page);
slim_hidden_proto (cairo_surface_status);
slim_hidden_proto (cairo_version_string);

#if CAIRO_HAS_PNG_FUNCTIONS

slim_hidden_proto (cairo_surface_write_to_png_stream);

#endif

CAIRO_END_DECLS

#include "cairo-mutex-private.h"
#include "cairo-fixed-private.h"
#include "cairo-wideint-private.h"
#include "cairo-malloc-private.h"
#include "cairo-hash-private.h"

#endif

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