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+/* 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., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, 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>
+ */
+
+#ifndef CAIRO_H
+#define CAIRO_H
+
+#include "cairo-version.h"
+#include "cairo-features.h"
+#include "cairo-deprecated.h"
+
+#ifdef __cplusplus
+# define CAIRO_BEGIN_DECLS extern "C" {
+# define CAIRO_END_DECLS }
+#else
+# define CAIRO_BEGIN_DECLS
+# define CAIRO_END_DECLS
+#endif
+
+#ifndef cairo_public
+# if defined (_MSC_VER) && ! defined (CAIRO_WIN32_STATIC_BUILD)
+# define cairo_public __declspec(dllimport)
+# else
+# define cairo_public
+# endif
+#endif
+
+CAIRO_BEGIN_DECLS
+
+#define CAIRO_VERSION_ENCODE(major, minor, micro) ( \
+ ((major) * 10000) \
+ + ((minor) * 100) \
+ + ((micro) * 1))
+
+#define CAIRO_VERSION CAIRO_VERSION_ENCODE( \
+ CAIRO_VERSION_MAJOR, \
+ CAIRO_VERSION_MINOR, \
+ CAIRO_VERSION_MICRO)
+
+
+#define CAIRO_VERSION_STRINGIZE_(major, minor, micro) \
+ #major"."#minor"."#micro
+#define CAIRO_VERSION_STRINGIZE(major, minor, micro) \
+ CAIRO_VERSION_STRINGIZE_(major, minor, micro)
+
+#define CAIRO_VERSION_STRING CAIRO_VERSION_STRINGIZE( \
+ CAIRO_VERSION_MAJOR, \
+ CAIRO_VERSION_MINOR, \
+ CAIRO_VERSION_MICRO)
+
+
+cairo_public int
+cairo_version (void);
+
+cairo_public const char*
+cairo_version_string (void);
+
+/**
+ * cairo_bool_t:
+ *
+ * #cairo_bool_t is used for boolean values. Returns of type
+ * #cairo_bool_t will always be either 0 or 1, but testing against
+ * these values explicitly is not encouraged; just use the
+ * value as a boolean condition.
+ *
+ * <informalexample><programlisting>
+ * if (cairo_in_stroke (cr, x, y)) {
+ * /<!-- -->* do something *<!-- -->/
+ * }
+ * </programlisting></informalexample>
+ *
+ * Since: 1.0
+ **/
+typedef int cairo_bool_t;
+
+/**
+ * cairo_t:
+ *
+ * A #cairo_t contains the current state of the rendering device,
+ * including coordinates of yet to be drawn shapes.
+ *
+ * Cairo contexts, as #cairo_t objects are named, are central to
+ * cairo and all drawing with cairo is always done to a #cairo_t
+ * object.
+ *
+ * Memory management of #cairo_t is done with
+ * cairo_reference() and cairo_destroy().
+ *
+ * Since: 1.0
+ **/
+typedef struct _cairo cairo_t;
+
+/**
+ * cairo_surface_t:
+ *
+ * A #cairo_surface_t represents an image, either as the destination
+ * of a drawing operation or as source when drawing onto another
+ * surface. To draw to a #cairo_surface_t, create a cairo context
+ * with the surface as the target, using cairo_create().
+ *
+ * There are different subtypes of #cairo_surface_t for
+ * different drawing backends; for example, cairo_image_surface_create()
+ * creates a bitmap image in memory.
+ * The type of a surface can be queried with cairo_surface_get_type().
+ *
+ * The initial contents of a surface after creation depend upon the manner
+ * of its creation. If cairo creates the surface and backing storage for
+ * the user, it will be initially cleared; for example,
+ * cairo_image_surface_create() and cairo_surface_create_similar().
+ * Alternatively, if the user passes in a reference to some backing storage
+ * and asks cairo to wrap that in a #cairo_surface_t, then the contents are
+ * not modified; for example, cairo_image_surface_create_for_data() and
+ * cairo_xlib_surface_create().
+ *
+ * Memory management of #cairo_surface_t is done with
+ * cairo_surface_reference() and cairo_surface_destroy().
+ *
+ * Since: 1.0
+ **/
+typedef struct _cairo_surface cairo_surface_t;
+
+/**
+ * cairo_device_t:
+ *
+ * A #cairo_device_t represents the driver interface for drawing
+ * operations to a #cairo_surface_t. There are different subtypes of
+ * #cairo_device_t for different drawing backends; for example,
+ * cairo_egl_device_create() creates a device that wraps an EGL display and
+ * context.
+ *
+ * The type of a device can be queried with cairo_device_get_type().
+ *
+ * Memory management of #cairo_device_t is done with
+ * cairo_device_reference() and cairo_device_destroy().
+ *
+ * Since: 1.10
+ **/
+typedef struct _cairo_device cairo_device_t;
+
+/**
+ * cairo_matrix_t:
+ * @xx: xx component of the affine transformation
+ * @yx: yx component of the affine transformation
+ * @xy: xy component of the affine transformation
+ * @yy: yy component of the affine transformation
+ * @x0: X translation component of the affine transformation
+ * @y0: Y translation component of the affine transformation
+ *
+ * A #cairo_matrix_t holds an affine transformation, such as a scale,
+ * rotation, shear, or a combination of those. The transformation of
+ * a point (x, y) is given by:
+ * <programlisting>
+ * x_new = xx * x + xy * y + x0;
+ * y_new = yx * x + yy * y + y0;
+ * </programlisting>
+ *
+ * Since: 1.0
+ **/
+typedef struct _cairo_matrix {
+ double xx; double yx;
+ double xy; double yy;
+ double x0; double y0;
+} cairo_matrix_t;
+
+/**
+ * cairo_pattern_t:
+ *
+ * A #cairo_pattern_t represents a source when drawing onto a
+ * surface. There are different subtypes of #cairo_pattern_t,
+ * for different types of sources; for example,
+ * cairo_pattern_create_rgb() creates a pattern for a solid
+ * opaque color.
+ *
+ * Other than various
+ * <function>cairo_pattern_create_<emphasis>type</emphasis>()</function>
+ * functions, some of the pattern types can be implicitly created using various
+ * <function>cairo_set_source_<emphasis>type</emphasis>()</function> functions;
+ * for example cairo_set_source_rgb().
+ *
+ * The type of a pattern can be queried with cairo_pattern_get_type().
+ *
+ * Memory management of #cairo_pattern_t is done with
+ * cairo_pattern_reference() and cairo_pattern_destroy().
+ *
+ * Since: 1.0
+ **/
+typedef struct _cairo_pattern cairo_pattern_t;
+
+/**
+ * cairo_destroy_func_t:
+ * @data: The data element being destroyed.
+ *
+ * #cairo_destroy_func_t the type of function which is called when a
+ * data element is destroyed. It is passed the pointer to the data
+ * element and should free any memory and resources allocated for it.
+ *
+ * Since: 1.0
+ **/
+typedef void (*cairo_destroy_func_t) (void *data);
+
+/**
+ * cairo_user_data_key_t:
+ * @unused: not used; ignore.
+ *
+ * #cairo_user_data_key_t is used for attaching user data to cairo
+ * data structures. The actual contents of the struct is never used,
+ * and there is no need to initialize the object; only the unique
+ * address of a #cairo_data_key_t object is used. Typically, you
+ * would just use the address of a static #cairo_data_key_t object.
+ *
+ * Since: 1.0
+ **/
+typedef struct _cairo_user_data_key {
+ int unused;
+} cairo_user_data_key_t;
+
+/**
+ * cairo_status_t:
+ * @CAIRO_STATUS_SUCCESS: no error has occurred (Since 1.0)
+ * @CAIRO_STATUS_NO_MEMORY: out of memory (Since 1.0)
+ * @CAIRO_STATUS_INVALID_RESTORE: cairo_restore() called without matching cairo_save() (Since 1.0)
+ * @CAIRO_STATUS_INVALID_POP_GROUP: no saved group to pop, i.e. cairo_pop_group() without matching cairo_push_group() (Since 1.0)
+ * @CAIRO_STATUS_NO_CURRENT_POINT: no current point defined (Since 1.0)
+ * @CAIRO_STATUS_INVALID_MATRIX: invalid matrix (not invertible) (Since 1.0)
+ * @CAIRO_STATUS_INVALID_STATUS: invalid value for an input #cairo_status_t (Since 1.0)
+ * @CAIRO_STATUS_NULL_POINTER: %NULL pointer (Since 1.0)
+ * @CAIRO_STATUS_INVALID_STRING: input string not valid UTF-8 (Since 1.0)
+ * @CAIRO_STATUS_INVALID_PATH_DATA: input path data not valid (Since 1.0)
+ * @CAIRO_STATUS_READ_ERROR: error while reading from input stream (Since 1.0)
+ * @CAIRO_STATUS_WRITE_ERROR: error while writing to output stream (Since 1.0)
+ * @CAIRO_STATUS_SURFACE_FINISHED: target surface has been finished (Since 1.0)
+ * @CAIRO_STATUS_SURFACE_TYPE_MISMATCH: the surface type is not appropriate for the operation (Since 1.0)
+ * @CAIRO_STATUS_PATTERN_TYPE_MISMATCH: the pattern type is not appropriate for the operation (Since 1.0)
+ * @CAIRO_STATUS_INVALID_CONTENT: invalid value for an input #cairo_content_t (Since 1.0)
+ * @CAIRO_STATUS_INVALID_FORMAT: invalid value for an input #cairo_format_t (Since 1.0)
+ * @CAIRO_STATUS_INVALID_VISUAL: invalid value for an input Visual* (Since 1.0)
+ * @CAIRO_STATUS_FILE_NOT_FOUND: file not found (Since 1.0)
+ * @CAIRO_STATUS_INVALID_DASH: invalid value for a dash setting (Since 1.0)
+ * @CAIRO_STATUS_INVALID_DSC_COMMENT: invalid value for a DSC comment (Since 1.2)
+ * @CAIRO_STATUS_INVALID_INDEX: invalid index passed to getter (Since 1.4)
+ * @CAIRO_STATUS_CLIP_NOT_REPRESENTABLE: clip region not representable in desired format (Since 1.4)
+ * @CAIRO_STATUS_TEMP_FILE_ERROR: error creating or writing to a temporary file (Since 1.6)
+ * @CAIRO_STATUS_INVALID_STRIDE: invalid value for stride (Since 1.6)
+ * @CAIRO_STATUS_FONT_TYPE_MISMATCH: the font type is not appropriate for the operation (Since 1.8)
+ * @CAIRO_STATUS_USER_FONT_IMMUTABLE: the user-font is immutable (Since 1.8)
+ * @CAIRO_STATUS_USER_FONT_ERROR: error occurred in a user-font callback function (Since 1.8)
+ * @CAIRO_STATUS_NEGATIVE_COUNT: negative number used where it is not allowed (Since 1.8)
+ * @CAIRO_STATUS_INVALID_CLUSTERS: input clusters do not represent the accompanying text and glyph array (Since 1.8)
+ * @CAIRO_STATUS_INVALID_SLANT: invalid value for an input #cairo_font_slant_t (Since 1.8)
+ * @CAIRO_STATUS_INVALID_WEIGHT: invalid value for an input #cairo_font_weight_t (Since 1.8)
+ * @CAIRO_STATUS_INVALID_SIZE: invalid value (typically too big) for the size of the input (surface, pattern, etc.) (Since 1.10)
+ * @CAIRO_STATUS_USER_FONT_NOT_IMPLEMENTED: user-font method not implemented (Since 1.10)
+ * @CAIRO_STATUS_DEVICE_TYPE_MISMATCH: the device type is not appropriate for the operation (Since 1.10)
+ * @CAIRO_STATUS_DEVICE_ERROR: an operation to the device caused an unspecified error (Since 1.10)
+ * @CAIRO_STATUS_INVALID_MESH_CONSTRUCTION: a mesh pattern
+ * construction operation was used outside of a
+ * cairo_mesh_pattern_begin_patch()/cairo_mesh_pattern_end_patch()
+ * pair (Since 1.12)
+ * @CAIRO_STATUS_DEVICE_FINISHED: target device has been finished (Since 1.12)
+ * @CAIRO_STATUS_LAST_STATUS: this is a special value indicating the number of
+ * status values defined in this enumeration. When using this value, note
+ * that the version of cairo at run-time may have additional status values
+ * defined than the value of this symbol at compile-time. (Since 1.10)
+ *
+ * #cairo_status_t is used to indicate errors that can occur when
+ * using Cairo. In some cases it is returned directly by functions.
+ * but when using #cairo_t, the last error, if any, is stored in
+ * the context and can be retrieved with cairo_status().
+ *
+ * New entries may be added in future versions. Use cairo_status_to_string()
+ * to get a human-readable representation of an error message.
+ *
+ * Since: 1.0
+ **/
+typedef enum _cairo_status {
+ CAIRO_STATUS_SUCCESS = 0,
+
+ CAIRO_STATUS_NO_MEMORY,
+ CAIRO_STATUS_INVALID_RESTORE,
+ CAIRO_STATUS_INVALID_POP_GROUP,
+ CAIRO_STATUS_NO_CURRENT_POINT,
+ CAIRO_STATUS_INVALID_MATRIX,
+ CAIRO_STATUS_INVALID_STATUS,
+ CAIRO_STATUS_NULL_POINTER,
+ CAIRO_STATUS_INVALID_STRING,
+ CAIRO_STATUS_INVALID_PATH_DATA,
+ CAIRO_STATUS_READ_ERROR,
+ CAIRO_STATUS_WRITE_ERROR,
+ CAIRO_STATUS_SURFACE_FINISHED,
+ CAIRO_STATUS_SURFACE_TYPE_MISMATCH,
+ CAIRO_STATUS_PATTERN_TYPE_MISMATCH,
+ CAIRO_STATUS_INVALID_CONTENT,
+ CAIRO_STATUS_INVALID_FORMAT,
+ CAIRO_STATUS_INVALID_VISUAL,
+ CAIRO_STATUS_FILE_NOT_FOUND,
+ CAIRO_STATUS_INVALID_DASH,
+ CAIRO_STATUS_INVALID_DSC_COMMENT,
+ CAIRO_STATUS_INVALID_INDEX,
+ CAIRO_STATUS_CLIP_NOT_REPRESENTABLE,
+ CAIRO_STATUS_TEMP_FILE_ERROR,
+ CAIRO_STATUS_INVALID_STRIDE,
+ CAIRO_STATUS_FONT_TYPE_MISMATCH,
+ CAIRO_STATUS_USER_FONT_IMMUTABLE,
+ CAIRO_STATUS_USER_FONT_ERROR,
+ CAIRO_STATUS_NEGATIVE_COUNT,
+ CAIRO_STATUS_INVALID_CLUSTERS,
+ CAIRO_STATUS_INVALID_SLANT,
+ CAIRO_STATUS_INVALID_WEIGHT,
+ CAIRO_STATUS_INVALID_SIZE,
+ CAIRO_STATUS_USER_FONT_NOT_IMPLEMENTED,
+ CAIRO_STATUS_DEVICE_TYPE_MISMATCH,
+ CAIRO_STATUS_DEVICE_ERROR,
+ CAIRO_STATUS_INVALID_MESH_CONSTRUCTION,
+ CAIRO_STATUS_DEVICE_FINISHED,
+
+ CAIRO_STATUS_LAST_STATUS
+} cairo_status_t;
+
+/**
+ * cairo_content_t:
+ * @CAIRO_CONTENT_COLOR: The surface will hold color content only. (Since 1.0)
+ * @CAIRO_CONTENT_ALPHA: The surface will hold alpha content only. (Since 1.0)
+ * @CAIRO_CONTENT_COLOR_ALPHA: The surface will hold color and alpha content. (Since 1.0)
+ *
+ * #cairo_content_t is used to describe the content that a surface will
+ * contain, whether color information, alpha information (translucence
+ * vs. opacity), or both.
+ *
+ * Note: The large values here are designed to keep #cairo_content_t
+ * values distinct from #cairo_format_t values so that the
+ * implementation can detect the error if users confuse the two types.
+ *
+ * Since: 1.0
+ **/
+typedef enum _cairo_content {
+ CAIRO_CONTENT_COLOR = 0x1000,
+ CAIRO_CONTENT_ALPHA = 0x2000,
+ CAIRO_CONTENT_COLOR_ALPHA = 0x3000
+} cairo_content_t;
+
+/**
+ * cairo_format_t:
+ * @CAIRO_FORMAT_INVALID: no such format exists or is supported.
+ * @CAIRO_FORMAT_ARGB32: each pixel is a 32-bit quantity, with
+ * alpha in the upper 8 bits, then red, then green, then blue.
+ * The 32-bit quantities are stored native-endian. Pre-multiplied
+ * alpha is used. (That is, 50% transparent red is 0x80800000,
+ * not 0x80ff0000.) (Since 1.0)
+ * @CAIRO_FORMAT_RGB24: each pixel is a 32-bit quantity, with
+ * the upper 8 bits unused. Red, Green, and Blue are stored
+ * in the remaining 24 bits in that order. (Since 1.0)
+ * @CAIRO_FORMAT_A8: each pixel is a 8-bit quantity holding
+ * an alpha value. (Since 1.0)
+ * @CAIRO_FORMAT_A1: each pixel is a 1-bit quantity holding
+ * an alpha value. Pixels are packed together into 32-bit
+ * quantities. The ordering of the bits matches the
+ * endianess of the platform. On a big-endian machine, the
+ * first pixel is in the uppermost bit, on a little-endian
+ * machine the first pixel is in the least-significant bit. (Since 1.0)
+ * @CAIRO_FORMAT_RGB16_565: each pixel is a 16-bit quantity
+ * with red in the upper 5 bits, then green in the middle
+ * 6 bits, and blue in the lower 5 bits. (Since 1.2)
+ * @CAIRO_FORMAT_RGB30: like RGB24 but with 10bpc. (Since 1.12)
+ *
+ * #cairo_format_t is used to identify the memory format of
+ * image data.
+ *
+ * New entries may be added in future versions.
+ *
+ * Since: 1.0
+ **/
+typedef enum _cairo_format {
+ CAIRO_FORMAT_INVALID = -1,
+ CAIRO_FORMAT_ARGB32 = 0,
+ CAIRO_FORMAT_RGB24 = 1,
+ CAIRO_FORMAT_A8 = 2,
+ CAIRO_FORMAT_A1 = 3,
+ CAIRO_FORMAT_RGB16_565 = 4,
+ CAIRO_FORMAT_RGB30 = 5
+} cairo_format_t;
+
+
+/**
+ * cairo_write_func_t:
+ * @closure: the output closure
+ * @data: the buffer containing the data to write
+ * @length: the amount of data to write
+ *
+ * #cairo_write_func_t is the type of function which is called when a
+ * backend needs to write data to an output stream. It is passed the
+ * closure which was specified by the user at the time the write
+ * function was registered, the data to write and the length of the
+ * data in bytes. The write function should return
+ * %CAIRO_STATUS_SUCCESS if all the data was successfully written,
+ * %CAIRO_STATUS_WRITE_ERROR otherwise.
+ *
+ * Returns: the status code of the write operation
+ *
+ * Since: 1.0
+ **/
+typedef cairo_status_t (*cairo_write_func_t) (void *closure,
+ const unsigned char *data,
+ unsigned int length);
+
+/**
+ * cairo_read_func_t:
+ * @closure: the input closure
+ * @data: the buffer into which to read the data
+ * @length: the amount of data to read
+ *
+ * #cairo_read_func_t is the type of function which is called when a
+ * backend needs to read data from an input stream. It is passed the
+ * closure which was specified by the user at the time the read
+ * function was registered, the buffer to read the data into and the
+ * length of the data in bytes. The read function should return
+ * %CAIRO_STATUS_SUCCESS if all the data was successfully read,
+ * %CAIRO_STATUS_READ_ERROR otherwise.
+ *
+ * Returns: the status code of the read operation
+ *
+ * Since: 1.0
+ **/
+typedef cairo_status_t (*cairo_read_func_t) (void *closure,
+ unsigned char *data,
+ unsigned int length);
+
+/**
+ * cairo_rectangle_int_t:
+ * @x: X coordinate of the left side of the rectangle
+ * @y: Y coordinate of the the top side of the rectangle
+ * @width: width of the rectangle
+ * @height: height of the rectangle
+ *
+ * A data structure for holding a rectangle with integer coordinates.
+ *
+ * Since: 1.10
+ **/
+
+typedef struct _cairo_rectangle_int {
+ int x, y;
+ int width, height;
+} cairo_rectangle_int_t;
+
+
+/* Functions for manipulating state objects */
+cairo_public cairo_t *
+cairo_create (cairo_surface_t *target);
+
+cairo_public cairo_t *
+cairo_reference (cairo_t *cr);
+
+cairo_public void
+cairo_destroy (cairo_t *cr);
+
+cairo_public unsigned int
+cairo_get_reference_count (cairo_t *cr);
+
+cairo_public void *
+cairo_get_user_data (cairo_t *cr,
+ const cairo_user_data_key_t *key);
+
+cairo_public cairo_status_t
+cairo_set_user_data (cairo_t *cr,
+ const cairo_user_data_key_t *key,
+ void *user_data,
+ cairo_destroy_func_t destroy);
+
+cairo_public void
+cairo_save (cairo_t *cr);
+
+cairo_public void
+cairo_restore (cairo_t *cr);
+
+cairo_public void
+cairo_push_group (cairo_t *cr);
+
+cairo_public void
+cairo_push_group_with_content (cairo_t *cr, cairo_content_t content);
+
+cairo_public cairo_pattern_t *
+cairo_pop_group (cairo_t *cr);
+
+cairo_public void
+cairo_pop_group_to_source (cairo_t *cr);
+
+/* Modify state */
+
+/**
+ * cairo_operator_t:
+ * @CAIRO_OPERATOR_CLEAR: clear destination layer (bounded) (Since 1.0)
+ * @CAIRO_OPERATOR_SOURCE: replace destination layer (bounded) (Since 1.0)
+ * @CAIRO_OPERATOR_OVER: draw source layer on top of destination layer
+ * (bounded) (Since 1.0)
+ * @CAIRO_OPERATOR_IN: draw source where there was destination content
+ * (unbounded) (Since 1.0)
+ * @CAIRO_OPERATOR_OUT: draw source where there was no destination
+ * content (unbounded) (Since 1.0)
+ * @CAIRO_OPERATOR_ATOP: draw source on top of destination content and
+ * only there (Since 1.0)
+ * @CAIRO_OPERATOR_DEST: ignore the source (Since 1.0)
+ * @CAIRO_OPERATOR_DEST_OVER: draw destination on top of source (Since 1.0)
+ * @CAIRO_OPERATOR_DEST_IN: leave destination only where there was
+ * source content (unbounded) (Since 1.0)
+ * @CAIRO_OPERATOR_DEST_OUT: leave destination only where there was no
+ * source content (Since 1.0)
+ * @CAIRO_OPERATOR_DEST_ATOP: leave destination on top of source content
+ * and only there (unbounded) (Since 1.0)
+ * @CAIRO_OPERATOR_XOR: source and destination are shown where there is only
+ * one of them (Since 1.0)
+ * @CAIRO_OPERATOR_ADD: source and destination layers are accumulated (Since 1.0)
+ * @CAIRO_OPERATOR_SATURATE: like over, but assuming source and dest are
+ * disjoint geometries (Since 1.0)
+ * @CAIRO_OPERATOR_MULTIPLY: source and destination layers are multiplied.
+ * This causes the result to be at least as dark as the darker inputs. (Since 1.10)
+ * @CAIRO_OPERATOR_SCREEN: source and destination are complemented and
+ * multiplied. This causes the result to be at least as light as the lighter
+ * inputs. (Since 1.10)
+ * @CAIRO_OPERATOR_OVERLAY: multiplies or screens, depending on the
+ * lightness of the destination color. (Since 1.10)
+ * @CAIRO_OPERATOR_DARKEN: replaces the destination with the source if it
+ * is darker, otherwise keeps the source. (Since 1.10)
+ * @CAIRO_OPERATOR_LIGHTEN: replaces the destination with the source if it
+ * is lighter, otherwise keeps the source. (Since 1.10)
+ * @CAIRO_OPERATOR_COLOR_DODGE: brightens the destination color to reflect
+ * the source color. (Since 1.10)
+ * @CAIRO_OPERATOR_COLOR_BURN: darkens the destination color to reflect
+ * the source color. (Since 1.10)
+ * @CAIRO_OPERATOR_HARD_LIGHT: Multiplies or screens, dependent on source
+ * color. (Since 1.10)
+ * @CAIRO_OPERATOR_SOFT_LIGHT: Darkens or lightens, dependent on source
+ * color. (Since 1.10)
+ * @CAIRO_OPERATOR_DIFFERENCE: Takes the difference of the source and
+ * destination color. (Since 1.10)
+ * @CAIRO_OPERATOR_EXCLUSION: Produces an effect similar to difference, but
+ * with lower contrast. (Since 1.10)
+ * @CAIRO_OPERATOR_HSL_HUE: Creates a color with the hue of the source
+ * and the saturation and luminosity of the target. (Since 1.10)
+ * @CAIRO_OPERATOR_HSL_SATURATION: Creates a color with the saturation
+ * of the source and the hue and luminosity of the target. Painting with
+ * this mode onto a gray area produces no change. (Since 1.10)
+ * @CAIRO_OPERATOR_HSL_COLOR: Creates a color with the hue and saturation
+ * of the source and the luminosity of the target. This preserves the gray
+ * levels of the target and is useful for coloring monochrome images or
+ * tinting color images. (Since 1.10)
+ * @CAIRO_OPERATOR_HSL_LUMINOSITY: Creates a color with the luminosity of
+ * the source and the hue and saturation of the target. This produces an
+ * inverse effect to @CAIRO_OPERATOR_HSL_COLOR. (Since 1.10)
+ *
+ * #cairo_operator_t is used to set the compositing operator for all cairo
+ * drawing operations.
+ *
+ * The default operator is %CAIRO_OPERATOR_OVER.
+ *
+ * The operators marked as <firstterm>unbounded</firstterm> modify their
+ * destination even outside of the mask layer (that is, their effect is not
+ * bound by the mask layer). However, their effect can still be limited by
+ * way of clipping.
+ *
+ * To keep things simple, the operator descriptions here
+ * document the behavior for when both source and destination are either fully
+ * transparent or fully opaque. The actual implementation works for
+ * translucent layers too.
+ * For a more detailed explanation of the effects of each operator, including
+ * the mathematical definitions, see
+ * <ulink url="http://cairographics.org/operators/">http://cairographics.org/operators/</ulink>.
+ *
+ * Since: 1.0
+ **/
+typedef enum _cairo_operator {
+ CAIRO_OPERATOR_CLEAR,
+
+ CAIRO_OPERATOR_SOURCE,
+ CAIRO_OPERATOR_OVER,
+ CAIRO_OPERATOR_IN,
+ CAIRO_OPERATOR_OUT,
+ CAIRO_OPERATOR_ATOP,
+
+ CAIRO_OPERATOR_DEST,
+ CAIRO_OPERATOR_DEST_OVER,
+ CAIRO_OPERATOR_DEST_IN,
+ CAIRO_OPERATOR_DEST_OUT,
+ CAIRO_OPERATOR_DEST_ATOP,
+
+ CAIRO_OPERATOR_XOR,
+ CAIRO_OPERATOR_ADD,
+ CAIRO_OPERATOR_SATURATE,
+
+ CAIRO_OPERATOR_MULTIPLY,
+ CAIRO_OPERATOR_SCREEN,
+ CAIRO_OPERATOR_OVERLAY,
+ CAIRO_OPERATOR_DARKEN,
+ CAIRO_OPERATOR_LIGHTEN,
+ CAIRO_OPERATOR_COLOR_DODGE,
+ CAIRO_OPERATOR_COLOR_BURN,
+ CAIRO_OPERATOR_HARD_LIGHT,
+ CAIRO_OPERATOR_SOFT_LIGHT,
+ CAIRO_OPERATOR_DIFFERENCE,
+ CAIRO_OPERATOR_EXCLUSION,
+ CAIRO_OPERATOR_HSL_HUE,
+ CAIRO_OPERATOR_HSL_SATURATION,
+ CAIRO_OPERATOR_HSL_COLOR,
+ CAIRO_OPERATOR_HSL_LUMINOSITY
+} cairo_operator_t;
+
+cairo_public void
+cairo_set_operator (cairo_t *cr, cairo_operator_t op);
+
+cairo_public void
+cairo_set_source (cairo_t *cr, cairo_pattern_t *source);
+
+cairo_public void
+cairo_set_source_rgb (cairo_t *cr, double red, double green, double blue);
+
+cairo_public void
+cairo_set_source_rgba (cairo_t *cr,
+ double red, double green, double blue,
+ double alpha);
+
+cairo_public void
+cairo_set_source_surface (cairo_t *cr,
+ cairo_surface_t *surface,
+ double x,
+ double y);
+
+cairo_public void
+cairo_set_tolerance (cairo_t *cr, double tolerance);
+
+/**
+ * cairo_antialias_t:
+ * @CAIRO_ANTIALIAS_DEFAULT: Use the default antialiasing for
+ * the subsystem and target device, since 1.0
+ * @CAIRO_ANTIALIAS_NONE: Use a bilevel alpha mask, since 1.0
+ * @CAIRO_ANTIALIAS_GRAY: Perform single-color antialiasing (using
+ * shades of gray for black text on a white background, for example), since 1.0
+ * @CAIRO_ANTIALIAS_SUBPIXEL: Perform antialiasing by taking
+ * advantage of the order of subpixel elements on devices
+ * such as LCD panels, since 1.0
+ * @CAIRO_ANTIALIAS_FAST: Hint that the backend should perform some
+ * antialiasing but prefer speed over quality, since 1.12
+ * @CAIRO_ANTIALIAS_GOOD: The backend should balance quality against
+ * performance, since 1.12
+ * @CAIRO_ANTIALIAS_BEST: Hint that the backend should render at the highest
+ * quality, sacrificing speed if necessary, since 1.12
+ *
+ * Specifies the type of antialiasing to do when rendering text or shapes.
+ *
+ * As it is not necessarily clear from the above what advantages a particular
+ * antialias method provides, since 1.12, there is also a set of hints:
+ * @CAIRO_ANTIALIAS_FAST: Allow the backend to degrade raster quality for speed
+ * @CAIRO_ANTIALIAS_GOOD: A balance between speed and quality
+ * @CAIRO_ANTIALIAS_BEST: A high-fidelity, but potentially slow, raster mode
+ *
+ * These make no guarantee on how the backend will perform its rasterisation
+ * (if it even rasterises!), nor that they have any differing effect other
+ * than to enable some form of antialiasing. In the case of glyph rendering,
+ * @CAIRO_ANTIALIAS_FAST and @CAIRO_ANTIALIAS_GOOD will be mapped to
+ * @CAIRO_ANTIALIAS_GRAY, with @CAIRO_ANTALIAS_BEST being equivalent to
+ * @CAIRO_ANTIALIAS_SUBPIXEL.
+ *
+ * The interpretation of @CAIRO_ANTIALIAS_DEFAULT is left entirely up to
+ * the backend, typically this will be similar to @CAIRO_ANTIALIAS_GOOD.
+ *
+ * Since: 1.0
+ **/
+typedef enum _cairo_antialias {
+ CAIRO_ANTIALIAS_DEFAULT,
+
+ /* method */
+ CAIRO_ANTIALIAS_NONE,
+ CAIRO_ANTIALIAS_GRAY,
+ CAIRO_ANTIALIAS_SUBPIXEL,
+
+ /* hints */
+ CAIRO_ANTIALIAS_FAST,
+ CAIRO_ANTIALIAS_GOOD,
+ CAIRO_ANTIALIAS_BEST
+} cairo_antialias_t;
+
+cairo_public void
+cairo_set_antialias (cairo_t *cr, cairo_antialias_t antialias);
+
+/**
+ * cairo_fill_rule_t:
+ * @CAIRO_FILL_RULE_WINDING: If the path crosses the ray from
+ * left-to-right, counts +1. If the path crosses the ray
+ * from right to left, counts -1. (Left and right are determined
+ * from the perspective of looking along the ray from the starting
+ * point.) If the total count is non-zero, the point will be filled. (Since 1.0)
+ * @CAIRO_FILL_RULE_EVEN_ODD: Counts the total number of
+ * intersections, without regard to the orientation of the contour. If
+ * the total number of intersections is odd, the point will be
+ * filled. (Since 1.0)
+ *
+ * #cairo_fill_rule_t is used to select how paths are filled. For both
+ * fill rules, whether or not a point is included in the fill is
+ * determined by taking a ray from that point to infinity and looking
+ * at intersections with the path. The ray can be in any direction,
+ * as long as it doesn't pass through the end point of a segment
+ * or have a tricky intersection such as intersecting tangent to the path.
+ * (Note that filling is not actually implemented in this way. This
+ * is just a description of the rule that is applied.)
+ *
+ * The default fill rule is %CAIRO_FILL_RULE_WINDING.
+ *
+ * New entries may be added in future versions.
+ *
+ * Since: 1.0
+ **/
+typedef enum _cairo_fill_rule {
+ CAIRO_FILL_RULE_WINDING,
+ CAIRO_FILL_RULE_EVEN_ODD
+} cairo_fill_rule_t;
+
+cairo_public void
+cairo_set_fill_rule (cairo_t *cr, cairo_fill_rule_t fill_rule);
+
+cairo_public void
+cairo_set_line_width (cairo_t *cr, double width);
+
+/**
+ * cairo_line_cap_t:
+ * @CAIRO_LINE_CAP_BUTT: start(stop) the line exactly at the start(end) point (Since 1.0)
+ * @CAIRO_LINE_CAP_ROUND: use a round ending, the center of the circle is the end point (Since 1.0)
+ * @CAIRO_LINE_CAP_SQUARE: use squared ending, the center of the square is the end point (Since 1.0)
+ *
+ * Specifies how to render the endpoints of the path when stroking.
+ *
+ * The default line cap style is %CAIRO_LINE_CAP_BUTT.
+ *
+ * Since: 1.0
+ **/
+typedef enum _cairo_line_cap {
+ CAIRO_LINE_CAP_BUTT,
+ CAIRO_LINE_CAP_ROUND,
+ CAIRO_LINE_CAP_SQUARE
+} cairo_line_cap_t;
+
+cairo_public void
+cairo_set_line_cap (cairo_t *cr, cairo_line_cap_t line_cap);
+
+/**
+ * cairo_line_join_t:
+ * @CAIRO_LINE_JOIN_MITER: use a sharp (angled) corner, see
+ * cairo_set_miter_limit() (Since 1.0)
+ * @CAIRO_LINE_JOIN_ROUND: use a rounded join, the center of the circle is the
+ * joint point (Since 1.0)
+ * @CAIRO_LINE_JOIN_BEVEL: use a cut-off join, the join is cut off at half
+ * the line width from the joint point (Since 1.0)
+ *
+ * Specifies how to render the junction of two lines when stroking.
+ *
+ * The default line join style is %CAIRO_LINE_JOIN_MITER.
+ *
+ * Since: 1.0
+ **/
+typedef enum _cairo_line_join {
+ CAIRO_LINE_JOIN_MITER,
+ CAIRO_LINE_JOIN_ROUND,
+ CAIRO_LINE_JOIN_BEVEL
+} cairo_line_join_t;
+
+cairo_public void
+cairo_set_line_join (cairo_t *cr, cairo_line_join_t line_join);
+
+cairo_public void
+cairo_set_dash (cairo_t *cr,
+ const double *dashes,
+ int num_dashes,
+ double offset);
+
+cairo_public void
+cairo_set_miter_limit (cairo_t *cr, double limit);
+
+cairo_public void
+cairo_translate (cairo_t *cr, double tx, double ty);
+
+cairo_public void
+cairo_scale (cairo_t *cr, double sx, double sy);
+
+cairo_public void
+cairo_rotate (cairo_t *cr, double angle);
+
+cairo_public void
+cairo_transform (cairo_t *cr,
+ const cairo_matrix_t *matrix);
+
+cairo_public void
+cairo_set_matrix (cairo_t *cr,
+ const cairo_matrix_t *matrix);
+
+cairo_public void
+cairo_identity_matrix (cairo_t *cr);
+
+cairo_public void
+cairo_user_to_device (cairo_t *cr, double *x, double *y);
+
+cairo_public void
+cairo_user_to_device_distance (cairo_t *cr, double *dx, double *dy);
+
+cairo_public void
+cairo_device_to_user (cairo_t *cr, double *x, double *y);
+
+cairo_public void
+cairo_device_to_user_distance (cairo_t *cr, double *dx, double *dy);
+
+/* Path creation functions */
+cairo_public void
+cairo_new_path (cairo_t *cr);
+
+cairo_public void
+cairo_move_to (cairo_t *cr, double x, double y);
+
+cairo_public void
+cairo_new_sub_path (cairo_t *cr);
+
+cairo_public void
+cairo_line_to (cairo_t *cr, double x, double y);
+
+cairo_public void
+cairo_curve_to (cairo_t *cr,
+ double x1, double y1,
+ double x2, double y2,
+ double x3, double y3);
+
+cairo_public void
+cairo_arc (cairo_t *cr,
+ double xc, double yc,
+ double radius,
+ double angle1, double angle2);
+
+cairo_public void
+cairo_arc_negative (cairo_t *cr,
+ double xc, double yc,
+ double radius,
+ double angle1, double angle2);
+
+/* XXX: NYI
+cairo_public void
+cairo_arc_to (cairo_t *cr,
+ double x1, double y1,
+ double x2, double y2,
+ double radius);
+*/
+
+cairo_public void
+cairo_rel_move_to (cairo_t *cr, double dx, double dy);
+
+cairo_public void
+cairo_rel_line_to (cairo_t *cr, double dx, double dy);
+
+cairo_public void
+cairo_rel_curve_to (cairo_t *cr,
+ double dx1, double dy1,
+ double dx2, double dy2,
+ double dx3, double dy3);
+
+cairo_public void
+cairo_rectangle (cairo_t *cr,
+ double x, double y,
+ double width, double height);
+
+/* XXX: NYI
+cairo_public void
+cairo_stroke_to_path (cairo_t *cr);
+*/
+
+cairo_public void
+cairo_close_path (cairo_t *cr);
+
+cairo_public void
+cairo_path_extents (cairo_t *cr,
+ double *x1, double *y1,
+ double *x2, double *y2);
+
+/* Painting functions */
+cairo_public void
+cairo_paint (cairo_t *cr);
+
+cairo_public void
+cairo_paint_with_alpha (cairo_t *cr,
+ double alpha);
+
+cairo_public void
+cairo_mask (cairo_t *cr,
+ cairo_pattern_t *pattern);
+
+cairo_public void
+cairo_mask_surface (cairo_t *cr,
+ cairo_surface_t *surface,
+ double surface_x,
+ double surface_y);
+
+cairo_public void
+cairo_stroke (cairo_t *cr);
+
+cairo_public void
+cairo_stroke_preserve (cairo_t *cr);
+
+cairo_public void
+cairo_fill (cairo_t *cr);
+
+cairo_public void
+cairo_fill_preserve (cairo_t *cr);
+
+cairo_public void
+cairo_copy_page (cairo_t *cr);
+
+cairo_public void
+cairo_show_page (cairo_t *cr);
+
+/* Insideness testing */
+cairo_public cairo_bool_t
+cairo_in_stroke (cairo_t *cr, double x, double y);
+
+cairo_public cairo_bool_t
+cairo_in_fill (cairo_t *cr, double x, double y);
+
+cairo_public cairo_bool_t
+cairo_in_clip (cairo_t *cr, double x, double y);
+
+/* Rectangular extents */
+cairo_public void
+cairo_stroke_extents (cairo_t *cr,
+ double *x1, double *y1,
+ double *x2, double *y2);
+
+cairo_public void
+cairo_fill_extents (cairo_t *cr,
+ double *x1, double *y1,
+ double *x2, double *y2);
+
+/* Clipping */
+cairo_public void
+cairo_reset_clip (cairo_t *cr);
+
+cairo_public void
+cairo_clip (cairo_t *cr);
+
+cairo_public void
+cairo_clip_preserve (cairo_t *cr);
+
+cairo_public void
+cairo_clip_extents (cairo_t *cr,
+ double *x1, double *y1,
+ double *x2, double *y2);
+
+/**
+ * cairo_rectangle_t:
+ * @x: X coordinate of the left side of the rectangle
+ * @y: Y coordinate of the the top side of the rectangle
+ * @width: width of the rectangle
+ * @height: height of the rectangle
+ *
+ * A data structure for holding a rectangle.
+ *
+ * Since: 1.4
+ **/
+typedef struct _cairo_rectangle {
+ double x, y, width, height;
+} cairo_rectangle_t;
+
+/**
+ * cairo_rectangle_list_t:
+ * @status: Error status of the rectangle list
+ * @rectangles: Array containing the rectangles
+ * @num_rectangles: Number of rectangles in this list
+ *
+ * A data structure for holding a dynamically allocated
+ * array of rectangles.
+ *
+ * Since: 1.4
+ **/
+typedef struct _cairo_rectangle_list {
+ cairo_status_t status;
+ cairo_rectangle_t *rectangles;
+ int num_rectangles;
+} cairo_rectangle_list_t;
+
+cairo_public cairo_rectangle_list_t *
+cairo_copy_clip_rectangle_list (cairo_t *cr);
+
+cairo_public void
+cairo_rectangle_list_destroy (cairo_rectangle_list_t *rectangle_list);
+
+/* Font/Text functions */
+
+/**
+ * cairo_scaled_font_t:
+ *
+ * A #cairo_scaled_font_t is a font scaled to a particular size and device
+ * resolution. A #cairo_scaled_font_t is most useful for low-level font
+ * usage where a library or application wants to cache a reference
+ * to a scaled font to speed up the computation of metrics.
+ *
+ * There are various types of scaled fonts, depending on the
+ * <firstterm>font backend</firstterm> they use. The type of a
+ * scaled font can be queried using cairo_scaled_font_get_type().
+ *
+ * Memory management of #cairo_scaled_font_t is done with
+ * cairo_scaled_font_reference() and cairo_scaled_font_destroy().
+ *
+ * Since: 1.0
+ **/
+typedef struct _cairo_scaled_font cairo_scaled_font_t;
+
+/**
+ * cairo_font_face_t:
+ *
+ * A #cairo_font_face_t specifies all aspects of a font other
+ * than the size or font matrix (a font matrix is used to distort
+ * a font by sheering it or scaling it unequally in the two
+ * directions) . A font face can be set on a #cairo_t by using
+ * cairo_set_font_face(); the size and font matrix are set with
+ * cairo_set_font_size() and cairo_set_font_matrix().
+ *
+ * There are various types of font faces, depending on the
+ * <firstterm>font backend</firstterm> they use. The type of a
+ * font face can be queried using cairo_font_face_get_type().
+ *
+ * Memory management of #cairo_font_face_t is done with
+ * cairo_font_face_reference() and cairo_font_face_destroy().
+ *
+ * Since: 1.0
+ **/
+typedef struct _cairo_font_face cairo_font_face_t;
+
+/**
+ * cairo_glyph_t:
+ * @index: glyph index in the font. The exact interpretation of the
+ * glyph index depends on the font technology being used.
+ * @x: the offset in the X direction between the origin used for
+ * drawing or measuring the string and the origin of this glyph.
+ * @y: the offset in the Y direction between the origin used for
+ * drawing or measuring the string and the origin of this glyph.
+ *
+ * The #cairo_glyph_t structure holds information about a single glyph
+ * when drawing or measuring text. A font is (in simple terms) a
+ * collection of shapes used to draw text. A glyph is one of these
+ * shapes. There can be multiple glyphs for a single character
+ * (alternates to be used in different contexts, for example), or a
+ * glyph can be a <firstterm>ligature</firstterm> of multiple
+ * characters. Cairo doesn't expose any way of converting input text
+ * into glyphs, so in order to use the Cairo interfaces that take
+ * arrays of glyphs, you must directly access the appropriate
+ * underlying font system.
+ *
+ * Note that the offsets given by @x and @y are not cumulative. When
+ * drawing or measuring text, each glyph is individually positioned
+ * with respect to the overall origin
+ *
+ * Since: 1.0
+ **/
+typedef struct {
+ unsigned long index;
+ double x;
+ double y;
+} cairo_glyph_t;
+
+cairo_public cairo_glyph_t *
+cairo_glyph_allocate (int num_glyphs);
+
+cairo_public void
+cairo_glyph_free (cairo_glyph_t *glyphs);
+
+/**
+ * cairo_text_cluster_t:
+ * @num_bytes: the number of bytes of UTF-8 text covered by cluster
+ * @num_glyphs: the number of glyphs covered by cluster
+ *
+ * The #cairo_text_cluster_t structure holds information about a single
+ * <firstterm>text cluster</firstterm>. A text cluster is a minimal
+ * mapping of some glyphs corresponding to some UTF-8 text.
+ *
+ * For a cluster to be valid, both @num_bytes and @num_glyphs should
+ * be non-negative, and at least one should be non-zero.
+ * Note that clusters with zero glyphs are not as well supported as
+ * normal clusters. For example, PDF rendering applications typically
+ * ignore those clusters when PDF text is being selected.
+ *
+ * See cairo_show_text_glyphs() for how clusters are used in advanced
+ * text operations.
+ *
+ * Since: 1.8
+ **/
+typedef struct {
+ int num_bytes;
+ int num_glyphs;
+} cairo_text_cluster_t;
+
+cairo_public cairo_text_cluster_t *
+cairo_text_cluster_allocate (int num_clusters);
+
+cairo_public void
+cairo_text_cluster_free (cairo_text_cluster_t *clusters);
+
+/**
+ * cairo_text_cluster_flags_t:
+ * @CAIRO_TEXT_CLUSTER_FLAG_BACKWARD: The clusters in the cluster array
+ * map to glyphs in the glyph array from end to start. (Since 1.8)
+ *
+ * Specifies properties of a text cluster mapping.
+ *
+ * Since: 1.8
+ **/
+typedef enum _cairo_text_cluster_flags {
+ CAIRO_TEXT_CLUSTER_FLAG_BACKWARD = 0x00000001
+} cairo_text_cluster_flags_t;
+
+/**
+ * cairo_text_extents_t:
+ * @x_bearing: the horizontal distance from the origin to the
+ * leftmost part of the glyphs as drawn. Positive if the
+ * glyphs lie entirely to the right of the origin.
+ * @y_bearing: the vertical distance from the origin to the
+ * topmost part of the glyphs as drawn. Positive only if the
+ * glyphs lie completely below the origin; will usually be
+ * negative.
+ * @width: width of the glyphs as drawn
+ * @height: height of the glyphs as drawn
+ * @x_advance:distance to advance in the X direction
+ * after drawing these glyphs
+ * @y_advance: distance to advance in the Y direction
+ * after drawing these glyphs. Will typically be zero except
+ * for vertical text layout as found in East-Asian languages.
+ *
+ * The #cairo_text_extents_t structure stores the extents of a single
+ * glyph or a string of glyphs in user-space coordinates. Because text
+ * extents are in user-space coordinates, they are mostly, but not
+ * entirely, independent of the current transformation matrix. If you call
+ * <literal>cairo_scale(cr, 2.0, 2.0)</literal>, text will
+ * be drawn twice as big, but the reported text extents will not be
+ * doubled. They will change slightly due to hinting (so you can't
+ * assume that metrics are independent of the transformation matrix),
+ * but otherwise will remain unchanged.
+ *
+ * Since: 1.0
+ **/
+typedef struct {
+ double x_bearing;
+ double y_bearing;
+ double width;
+ double height;
+ double x_advance;
+ double y_advance;
+} cairo_text_extents_t;
+
+/**
+ * cairo_font_extents_t:
+ * @ascent: the distance that the font extends above the baseline.
+ * Note that this is not always exactly equal to the maximum
+ * of the extents of all the glyphs in the font, but rather
+ * is picked to express the font designer's intent as to
+ * how the font should align with elements above it.
+ * @descent: the distance that the font extends below the baseline.
+ * This value is positive for typical fonts that include
+ * portions below the baseline. Note that this is not always
+ * exactly equal to the maximum of the extents of all the
+ * glyphs in the font, but rather is picked to express the
+ * font designer's intent as to how the font should
+ * align with elements below it.
+ * @height: the recommended vertical distance between baselines when
+ * setting consecutive lines of text with the font. This
+ * is greater than @ascent+@descent by a
+ * quantity known as the <firstterm>line spacing</firstterm>
+ * or <firstterm>external leading</firstterm>. When space
+ * is at a premium, most fonts can be set with only
+ * a distance of @ascent+@descent between lines.
+ * @max_x_advance: the maximum distance in the X direction that
+ * the origin is advanced for any glyph in the font.
+ * @max_y_advance: the maximum distance in the Y direction that
+ * the origin is advanced for any glyph in the font.
+ * This will be zero for normal fonts used for horizontal
+ * writing. (The scripts of East Asia are sometimes written
+ * vertically.)
+ *
+ * The #cairo_font_extents_t structure stores metric information for
+ * a font. Values are given in the current user-space coordinate
+ * system.
+ *
+ * Because font metrics are in user-space coordinates, they are
+ * mostly, but not entirely, independent of the current transformation
+ * matrix. If you call <literal>cairo_scale(cr, 2.0, 2.0)</literal>,
+ * text will be drawn twice as big, but the reported text extents will
+ * not be doubled. They will change slightly due to hinting (so you
+ * can't assume that metrics are independent of the transformation
+ * matrix), but otherwise will remain unchanged.
+ *
+ * Since: 1.0
+ **/
+typedef struct {
+ double ascent;
+ double descent;
+ double height;
+ double max_x_advance;
+ double max_y_advance;
+} cairo_font_extents_t;
+
+/**
+ * cairo_font_slant_t:
+ * @CAIRO_FONT_SLANT_NORMAL: Upright font style, since 1.0
+ * @CAIRO_FONT_SLANT_ITALIC: Italic font style, since 1.0
+ * @CAIRO_FONT_SLANT_OBLIQUE: Oblique font style, since 1.0
+ *
+ * Specifies variants of a font face based on their slant.
+ *
+ * Since: 1.0
+ **/
+typedef enum _cairo_font_slant {
+ CAIRO_FONT_SLANT_NORMAL,
+ CAIRO_FONT_SLANT_ITALIC,
+ CAIRO_FONT_SLANT_OBLIQUE
+} cairo_font_slant_t;
+
+/**
+ * cairo_font_weight_t:
+ * @CAIRO_FONT_WEIGHT_NORMAL: Normal font weight, since 1.0
+ * @CAIRO_FONT_WEIGHT_BOLD: Bold font weight, since 1.0
+ *
+ * Specifies variants of a font face based on their weight.
+ *
+ * Since: 1.0
+ **/
+typedef enum _cairo_font_weight {
+ CAIRO_FONT_WEIGHT_NORMAL,
+ CAIRO_FONT_WEIGHT_BOLD
+} cairo_font_weight_t;
+
+/**
+ * cairo_subpixel_order_t:
+ * @CAIRO_SUBPIXEL_ORDER_DEFAULT: Use the default subpixel order for
+ * for the target device, since 1.0
+ * @CAIRO_SUBPIXEL_ORDER_RGB: Subpixel elements are arranged horizontally
+ * with red at the left, since 1.0
+ * @CAIRO_SUBPIXEL_ORDER_BGR: Subpixel elements are arranged horizontally
+ * with blue at the left, since 1.0
+ * @CAIRO_SUBPIXEL_ORDER_VRGB: Subpixel elements are arranged vertically
+ * with red at the top, since 1.0
+ * @CAIRO_SUBPIXEL_ORDER_VBGR: Subpixel elements are arranged vertically
+ * with blue at the top, since 1.0
+ *
+ * The subpixel order specifies the order of color elements within
+ * each pixel on the display device when rendering with an
+ * antialiasing mode of %CAIRO_ANTIALIAS_SUBPIXEL.
+ *
+ * Since: 1.0
+ **/
+typedef enum _cairo_subpixel_order {
+ CAIRO_SUBPIXEL_ORDER_DEFAULT,
+ CAIRO_SUBPIXEL_ORDER_RGB,
+ CAIRO_SUBPIXEL_ORDER_BGR,
+ CAIRO_SUBPIXEL_ORDER_VRGB,
+ CAIRO_SUBPIXEL_ORDER_VBGR
+} cairo_subpixel_order_t;
+
+/**
+ * cairo_hint_style_t:
+ * @CAIRO_HINT_STYLE_DEFAULT: Use the default hint style for
+ * font backend and target device, since 1.0
+ * @CAIRO_HINT_STYLE_NONE: Do not hint outlines, since 1.0
+ * @CAIRO_HINT_STYLE_SLIGHT: Hint outlines slightly to improve
+ * contrast while retaining good fidelity to the original
+ * shapes, since 1.0
+ * @CAIRO_HINT_STYLE_MEDIUM: Hint outlines with medium strength
+ * giving a compromise between fidelity to the original shapes
+ * and contrast, since 1.0
+ * @CAIRO_HINT_STYLE_FULL: Hint outlines to maximize contrast, since 1.0
+ *
+ * Specifies the type of hinting to do on font outlines. Hinting
+ * is the process of fitting outlines to the pixel grid in order
+ * to improve the appearance of the result. Since hinting outlines
+ * involves distorting them, it also reduces the faithfulness
+ * to the original outline shapes. Not all of the outline hinting
+ * styles are supported by all font backends.
+ *
+ * New entries may be added in future versions.
+ *
+ * Since: 1.0
+ **/
+typedef enum _cairo_hint_style {
+ CAIRO_HINT_STYLE_DEFAULT,
+ CAIRO_HINT_STYLE_NONE,
+ CAIRO_HINT_STYLE_SLIGHT,
+ CAIRO_HINT_STYLE_MEDIUM,
+ CAIRO_HINT_STYLE_FULL
+} cairo_hint_style_t;
+
+/**
+ * cairo_hint_metrics_t:
+ * @CAIRO_HINT_METRICS_DEFAULT: Hint metrics in the default
+ * manner for the font backend and target device, since 1.0
+ * @CAIRO_HINT_METRICS_OFF: Do not hint font metrics, since 1.0
+ * @CAIRO_HINT_METRICS_ON: Hint font metrics, since 1.0
+ *
+ * Specifies whether to hint font metrics; hinting font metrics
+ * means quantizing them so that they are integer values in
+ * device space. Doing this improves the consistency of
+ * letter and line spacing, however it also means that text
+ * will be laid out differently at different zoom factors.
+ *
+ * Since: 1.0
+ **/
+typedef enum _cairo_hint_metrics {
+ CAIRO_HINT_METRICS_DEFAULT,
+ CAIRO_HINT_METRICS_OFF,
+ CAIRO_HINT_METRICS_ON
+} cairo_hint_metrics_t;
+
+/**
+ * cairo_font_options_t:
+ *
+ * An opaque structure holding all options that are used when
+ * rendering fonts.
+ *
+ * Individual features of a #cairo_font_options_t can be set or
+ * accessed using functions named
+ * <function>cairo_font_options_set_<emphasis>feature_name</emphasis>()</function> and
+ * <function>cairo_font_options_get_<emphasis>feature_name</emphasis>()</function>, like
+ * cairo_font_options_set_antialias() and
+ * cairo_font_options_get_antialias().
+ *
+ * New features may be added to a #cairo_font_options_t in the
+ * future. For this reason, cairo_font_options_copy(),
+ * cairo_font_options_equal(), cairo_font_options_merge(), and
+ * cairo_font_options_hash() should be used to copy, check
+ * for equality, merge, or compute a hash value of
+ * #cairo_font_options_t objects.
+ *
+ * Since: 1.0
+ **/
+typedef struct _cairo_font_options cairo_font_options_t;
+
+cairo_public cairo_font_options_t *
+cairo_font_options_create (void);
+
+cairo_public cairo_font_options_t *
+cairo_font_options_copy (const cairo_font_options_t *original);
+
+cairo_public void
+cairo_font_options_destroy (cairo_font_options_t *options);
+
+cairo_public cairo_status_t
+cairo_font_options_status (cairo_font_options_t *options);
+
+cairo_public void
+cairo_font_options_merge (cairo_font_options_t *options,
+ const cairo_font_options_t *other);
+cairo_public cairo_bool_t
+cairo_font_options_equal (const cairo_font_options_t *options,
+ const cairo_font_options_t *other);
+
+cairo_public unsigned long
+cairo_font_options_hash (const cairo_font_options_t *options);
+
+cairo_public void
+cairo_font_options_set_antialias (cairo_font_options_t *options,
+ cairo_antialias_t antialias);
+cairo_public cairo_antialias_t
+cairo_font_options_get_antialias (const cairo_font_options_t *options);
+
+cairo_public void
+cairo_font_options_set_subpixel_order (cairo_font_options_t *options,
+ cairo_subpixel_order_t subpixel_order);
+cairo_public cairo_subpixel_order_t
+cairo_font_options_get_subpixel_order (const cairo_font_options_t *options);
+
+cairo_public void
+cairo_font_options_set_hint_style (cairo_font_options_t *options,
+ cairo_hint_style_t hint_style);
+cairo_public cairo_hint_style_t
+cairo_font_options_get_hint_style (const cairo_font_options_t *options);
+
+cairo_public void
+cairo_font_options_set_hint_metrics (cairo_font_options_t *options,
+ cairo_hint_metrics_t hint_metrics);
+cairo_public cairo_hint_metrics_t
+cairo_font_options_get_hint_metrics (const cairo_font_options_t *options);
+
+/* This interface is for dealing with text as text, not caring about the
+ font object inside the the cairo_t. */
+
+cairo_public void
+cairo_select_font_face (cairo_t *cr,
+ const char *family,
+ cairo_font_slant_t slant,
+ cairo_font_weight_t weight);
+
+cairo_public void
+cairo_set_font_size (cairo_t *cr, double size);
+
+cairo_public void
+cairo_set_font_matrix (cairo_t *cr,
+ const cairo_matrix_t *matrix);
+
+cairo_public void
+cairo_get_font_matrix (cairo_t *cr,
+ cairo_matrix_t *matrix);
+
+cairo_public void
+cairo_set_font_options (cairo_t *cr,
+ const cairo_font_options_t *options);
+
+cairo_public void
+cairo_get_font_options (cairo_t *cr,
+ cairo_font_options_t *options);
+
+cairo_public void
+cairo_set_font_face (cairo_t *cr, cairo_font_face_t *font_face);
+
+cairo_public cairo_font_face_t *
+cairo_get_font_face (cairo_t *cr);
+
+cairo_public void
+cairo_set_scaled_font (cairo_t *cr,
+ const cairo_scaled_font_t *scaled_font);
+
+cairo_public cairo_scaled_font_t *
+cairo_get_scaled_font (cairo_t *cr);
+
+cairo_public void
+cairo_show_text (cairo_t *cr, const char *utf8);
+
+cairo_public void
+cairo_show_glyphs (cairo_t *cr, const cairo_glyph_t *glyphs, int num_glyphs);
+
+cairo_public void
+cairo_show_text_glyphs (cairo_t *cr,
+ const char *utf8,
+ int utf8_len,
+ const cairo_glyph_t *glyphs,
+ int num_glyphs,
+ const cairo_text_cluster_t *clusters,
+ int num_clusters,
+ cairo_text_cluster_flags_t cluster_flags);
+
+cairo_public void
+cairo_text_path (cairo_t *cr, const char *utf8);
+
+cairo_public void
+cairo_glyph_path (cairo_t *cr, const cairo_glyph_t *glyphs, int num_glyphs);
+
+cairo_public void
+cairo_text_extents (cairo_t *cr,
+ const char *utf8,
+ cairo_text_extents_t *extents);
+
+cairo_public void
+cairo_glyph_extents (cairo_t *cr,
+ const cairo_glyph_t *glyphs,
+ int num_glyphs,
+ cairo_text_extents_t *extents);
+
+cairo_public void
+cairo_font_extents (cairo_t *cr,
+ cairo_font_extents_t *extents);
+
+/* Generic identifier for a font style */
+
+cairo_public cairo_font_face_t *
+cairo_font_face_reference (cairo_font_face_t *font_face);
+
+cairo_public void
+cairo_font_face_destroy (cairo_font_face_t *font_face);
+
+cairo_public unsigned int
+cairo_font_face_get_reference_count (cairo_font_face_t *font_face);
+
+cairo_public cairo_status_t
+cairo_font_face_status (cairo_font_face_t *font_face);
+
+
+/**
+ * cairo_font_type_t:
+ * @CAIRO_FONT_TYPE_TOY: The font was created using cairo's toy font api (Since: 1.2)
+ * @CAIRO_FONT_TYPE_FT: The font is of type FreeType (Since: 1.2)
+ * @CAIRO_FONT_TYPE_WIN32: The font is of type Win32 (Since: 1.2)
+ * @CAIRO_FONT_TYPE_QUARTZ: The font is of type Quartz (Since: 1.6, in 1.2 and
+ * 1.4 it was named CAIRO_FONT_TYPE_ATSUI)
+ * @CAIRO_FONT_TYPE_USER: The font was create using cairo's user font api (Since: 1.8)
+ *
+ * #cairo_font_type_t is used to describe the type of a given font
+ * face or scaled font. The font types are also known as "font
+ * backends" within cairo.
+ *
+ * The type of a font face is determined by the function used to
+ * create it, which will generally be of the form
+ * <function>cairo_<emphasis>type</emphasis>_font_face_create(<!-- -->)</function>.
+ * The font face type can be queried with cairo_font_face_get_type()
+ *
+ * The various #cairo_font_face_t functions can be used with a font face
+ * of any type.
+ *
+ * The type of a scaled font is determined by the type of the font
+ * face passed to cairo_scaled_font_create(). The scaled font type can
+ * be queried with cairo_scaled_font_get_type()
+ *
+ * The various #cairo_scaled_font_t functions can be used with scaled
+ * fonts of any type, but some font backends also provide
+ * type-specific functions that must only be called with a scaled font
+ * of the appropriate type. These functions have names that begin with
+ * <function>cairo_<emphasis>type</emphasis>_scaled_font(<!-- -->)</function>
+ * such as cairo_ft_scaled_font_lock_face().
+ *
+ * The behavior of calling a type-specific function with a scaled font
+ * of the wrong type is undefined.
+ *
+ * New entries may be added in future versions.
+ *
+ * Since: 1.2
+ **/
+typedef enum _cairo_font_type {
+ CAIRO_FONT_TYPE_TOY,
+ CAIRO_FONT_TYPE_FT,
+ CAIRO_FONT_TYPE_WIN32,
+ CAIRO_FONT_TYPE_QUARTZ,
+ CAIRO_FONT_TYPE_USER
+} cairo_font_type_t;
+
+cairo_public cairo_font_type_t
+cairo_font_face_get_type (cairo_font_face_t *font_face);
+
+cairo_public void *
+cairo_font_face_get_user_data (cairo_font_face_t *font_face,
+ const cairo_user_data_key_t *key);
+
+cairo_public cairo_status_t
+cairo_font_face_set_user_data (cairo_font_face_t *font_face,
+ const cairo_user_data_key_t *key,
+ void *user_data,
+ cairo_destroy_func_t destroy);
+
+/* Portable interface to general font features. */
+
+cairo_public cairo_scaled_font_t *
+cairo_scaled_font_create (cairo_font_face_t *font_face,
+ const cairo_matrix_t *font_matrix,
+ const cairo_matrix_t *ctm,
+ const cairo_font_options_t *options);
+
+cairo_public cairo_scaled_font_t *
+cairo_scaled_font_reference (cairo_scaled_font_t *scaled_font);
+
+cairo_public void
+cairo_scaled_font_destroy (cairo_scaled_font_t *scaled_font);
+
+cairo_public unsigned int
+cairo_scaled_font_get_reference_count (cairo_scaled_font_t *scaled_font);
+
+cairo_public cairo_status_t
+cairo_scaled_font_status (cairo_scaled_font_t *scaled_font);
+
+cairo_public cairo_font_type_t
+cairo_scaled_font_get_type (cairo_scaled_font_t *scaled_font);
+
+cairo_public void *
+cairo_scaled_font_get_user_data (cairo_scaled_font_t *scaled_font,
+ const cairo_user_data_key_t *key);
+
+cairo_public cairo_status_t
+cairo_scaled_font_set_user_data (cairo_scaled_font_t *scaled_font,
+ const cairo_user_data_key_t *key,
+ void *user_data,
+ cairo_destroy_func_t destroy);
+
+cairo_public void
+cairo_scaled_font_extents (cairo_scaled_font_t *scaled_font,
+ cairo_font_extents_t *extents);
+
+cairo_public void
+cairo_scaled_font_text_extents (cairo_scaled_font_t *scaled_font,
+ const char *utf8,
+ cairo_text_extents_t *extents);
+
+cairo_public void
+cairo_scaled_font_glyph_extents (cairo_scaled_font_t *scaled_font,
+ const cairo_glyph_t *glyphs,
+ int num_glyphs,
+ cairo_text_extents_t *extents);
+
+cairo_public cairo_status_t
+cairo_scaled_font_text_to_glyphs (cairo_scaled_font_t *scaled_font,
+ double x,
+ double y,
+ const char *utf8,
+ int utf8_len,
+ cairo_glyph_t **glyphs,
+ int *num_glyphs,
+ cairo_text_cluster_t **clusters,
+ int *num_clusters,
+ cairo_text_cluster_flags_t *cluster_flags);
+
+cairo_public cairo_font_face_t *
+cairo_scaled_font_get_font_face (cairo_scaled_font_t *scaled_font);
+
+cairo_public void
+cairo_scaled_font_get_font_matrix (cairo_scaled_font_t *scaled_font,
+ cairo_matrix_t *font_matrix);
+
+cairo_public void
+cairo_scaled_font_get_ctm (cairo_scaled_font_t *scaled_font,
+ cairo_matrix_t *ctm);
+
+cairo_public void
+cairo_scaled_font_get_scale_matrix (cairo_scaled_font_t *scaled_font,
+ cairo_matrix_t *scale_matrix);
+
+cairo_public void
+cairo_scaled_font_get_font_options (cairo_scaled_font_t *scaled_font,
+ cairo_font_options_t *options);
+
+
+/* Toy fonts */
+
+cairo_public cairo_font_face_t *
+cairo_toy_font_face_create (const char *family,
+ cairo_font_slant_t slant,
+ cairo_font_weight_t weight);
+
+cairo_public const char *
+cairo_toy_font_face_get_family (cairo_font_face_t *font_face);
+
+cairo_public cairo_font_slant_t
+cairo_toy_font_face_get_slant (cairo_font_face_t *font_face);
+
+cairo_public cairo_font_weight_t
+cairo_toy_font_face_get_weight (cairo_font_face_t *font_face);
+
+
+/* User fonts */
+
+cairo_public cairo_font_face_t *
+cairo_user_font_face_create (void);
+
+/* User-font method signatures */
+
+/**
+ * cairo_user_scaled_font_init_func_t:
+ * @scaled_font: the scaled-font being created
+ * @cr: a cairo context, in font space
+ * @extents: font extents to fill in, in font space
+ *
+ * #cairo_user_scaled_font_init_func_t is the type of function which is
+ * called when a scaled-font needs to be created for a user font-face.
+ *
+ * The cairo context @cr is not used by the caller, but is prepared in font
+ * space, similar to what the cairo contexts passed to the render_glyph
+ * method will look like. The callback can use this context for extents
+ * computation for example. After the callback is called, @cr is checked
+ * for any error status.
+ *
+ * The @extents argument is where the user font sets the font extents for
+ * @scaled_font. It is in font space, which means that for most cases its
+ * ascent and descent members should add to 1.0. @extents is preset to
+ * hold a value of 1.0 for ascent, height, and max_x_advance, and 0.0 for
+ * descent and max_y_advance members.
+ *
+ * The callback is optional. If not set, default font extents as described
+ * in the previous paragraph will be used.
+ *
+ * Note that @scaled_font is not fully initialized at this
+ * point and trying to use it for text operations in the callback will result
+ * in deadlock.
+ *
+ * Returns: %CAIRO_STATUS_SUCCESS upon success, or an error status on error.
+ *
+ * Since: 1.8
+ **/
+typedef cairo_status_t (*cairo_user_scaled_font_init_func_t) (cairo_scaled_font_t *scaled_font,
+ cairo_t *cr,
+ cairo_font_extents_t *extents);
+
+/**
+ * cairo_user_scaled_font_render_glyph_func_t:
+ * @scaled_font: user scaled-font
+ * @glyph: glyph code to render
+ * @cr: cairo context to draw to, in font space
+ * @extents: glyph extents to fill in, in font space
+ *
+ * #cairo_user_scaled_font_render_glyph_func_t is the type of function which
+ * is called when a user scaled-font needs to render a glyph.
+ *
+ * The callback is mandatory, and expected to draw the glyph with code @glyph to
+ * the cairo context @cr. @cr is prepared such that the glyph drawing is done in
+ * font space. That is, the matrix set on @cr is the scale matrix of @scaled_font,
+ * The @extents argument is where the user font sets the font extents for
+ * @scaled_font. However, if user prefers to draw in user space, they can
+ * achieve that by changing the matrix on @cr. All cairo rendering operations
+ * to @cr are permitted, however, the result is undefined if any source other
+ * than the default source on @cr is used. That means, glyph bitmaps should
+ * be rendered using cairo_mask() instead of cairo_paint().
+ *
+ * Other non-default settings on @cr include a font size of 1.0 (given that
+ * it is set up to be in font space), and font options corresponding to
+ * @scaled_font.
+ *
+ * The @extents argument is preset to have <literal>x_bearing</literal>,
+ * <literal>width</literal>, and <literal>y_advance</literal> of zero,
+ * <literal>y_bearing</literal> set to <literal>-font_extents.ascent</literal>,
+ * <literal>height</literal> to <literal>font_extents.ascent+font_extents.descent</literal>,
+ * and <literal>x_advance</literal> to <literal>font_extents.max_x_advance</literal>.
+ * The only field user needs to set in majority of cases is
+ * <literal>x_advance</literal>.
+ * If the <literal>width</literal> field is zero upon the callback returning
+ * (which is its preset value), the glyph extents are automatically computed
+ * based on the drawings done to @cr. This is in most cases exactly what the
+ * desired behavior is. However, if for any reason the callback sets the
+ * extents, it must be ink extents, and include the extents of all drawing
+ * done to @cr in the callback.
+ *
+ * Returns: %CAIRO_STATUS_SUCCESS upon success, or
+ * %CAIRO_STATUS_USER_FONT_ERROR or any other error status on error.
+ *
+ * Since: 1.8
+ **/
+typedef cairo_status_t (*cairo_user_scaled_font_render_glyph_func_t) (cairo_scaled_font_t *scaled_font,
+ unsigned long glyph,
+ cairo_t *cr,
+ cairo_text_extents_t *extents);
+
+/**
+ * cairo_user_scaled_font_text_to_glyphs_func_t:
+ * @scaled_font: the scaled-font being created
+ * @utf8: a string of text encoded in UTF-8
+ * @utf8_len: length of @utf8 in bytes
+ * @glyphs: pointer to array of glyphs to fill, in font space
+ * @num_glyphs: pointer to number of glyphs
+ * @clusters: pointer to array of cluster mapping information to fill, or %NULL
+ * @num_clusters: pointer to number of clusters
+ * @cluster_flags: pointer to location to store cluster flags corresponding to the
+ * output @clusters
+ *
+ * #cairo_user_scaled_font_text_to_glyphs_func_t is the type of function which
+ * is called to convert input text to an array of glyphs. This is used by the
+ * cairo_show_text() operation.
+ *
+ * Using this callback the user-font has full control on glyphs and their
+ * positions. That means, it allows for features like ligatures and kerning,
+ * as well as complex <firstterm>shaping</firstterm> required for scripts like
+ * Arabic and Indic.
+ *
+ * The @num_glyphs argument is preset to the number of glyph entries available
+ * in the @glyphs buffer. If the @glyphs buffer is %NULL, the value of
+ * @num_glyphs will be zero. If the provided glyph array is too short for
+ * the conversion (or for convenience), a new glyph array may be allocated
+ * using cairo_glyph_allocate() and placed in @glyphs. Upon return,
+ * @num_glyphs should contain the number of generated glyphs. If the value
+ * @glyphs points at has changed after the call, the caller will free the
+ * allocated glyph array using cairo_glyph_free(). The caller will also free
+ * the original value of @glyphs, so the callback shouldn't do so.
+ * The callback should populate the glyph indices and positions (in font space)
+ * assuming that the text is to be shown at the origin.
+ *
+ * If @clusters is not %NULL, @num_clusters and @cluster_flags are also
+ * non-%NULL, and cluster mapping should be computed. The semantics of how
+ * cluster array allocation works is similar to the glyph array. That is,
+ * if @clusters initially points to a non-%NULL value, that array may be used
+ * as a cluster buffer, and @num_clusters points to the number of cluster
+ * entries available there. If the provided cluster array is too short for
+ * the conversion (or for convenience), a new cluster array may be allocated
+ * using cairo_text_cluster_allocate() and placed in @clusters. In this case,
+ * the original value of @clusters will still be freed by the caller. Upon
+ * return, @num_clusters should contain the number of generated clusters.
+ * If the value @clusters points at has changed after the call, the caller
+ * will free the allocated cluster array using cairo_text_cluster_free().
+ *
+ * The callback is optional. If @num_glyphs is negative upon
+ * the callback returning or if the return value
+ * is %CAIRO_STATUS_USER_FONT_NOT_IMPLEMENTED, the unicode_to_glyph callback
+ * is tried. See #cairo_user_scaled_font_unicode_to_glyph_func_t.
+ *
+ * Note: While cairo does not impose any limitation on glyph indices,
+ * some applications may assume that a glyph index fits in a 16-bit
+ * unsigned integer. As such, it is advised that user-fonts keep their
+ * glyphs in the 0 to 65535 range. Furthermore, some applications may
+ * assume that glyph 0 is a special glyph-not-found glyph. User-fonts
+ * are advised to use glyph 0 for such purposes and do not use that
+ * glyph value for other purposes.
+ *
+ * Returns: %CAIRO_STATUS_SUCCESS upon success,
+ * %CAIRO_STATUS_USER_FONT_NOT_IMPLEMENTED if fallback options should be tried,
+ * or %CAIRO_STATUS_USER_FONT_ERROR or any other error status on error.
+ *
+ * Since: 1.8
+ **/
+typedef cairo_status_t (*cairo_user_scaled_font_text_to_glyphs_func_t) (cairo_scaled_font_t *scaled_font,
+ const char *utf8,
+ int utf8_len,
+ cairo_glyph_t **glyphs,
+ int *num_glyphs,
+ cairo_text_cluster_t **clusters,
+ int *num_clusters,
+ cairo_text_cluster_flags_t *cluster_flags);
+
+/**
+ * cairo_user_scaled_font_unicode_to_glyph_func_t:
+ * @scaled_font: the scaled-font being created
+ * @unicode: input unicode character code-point
+ * @glyph_index: output glyph index
+ *
+ * #cairo_user_scaled_font_unicode_to_glyph_func_t is the type of function which
+ * is called to convert an input Unicode character to a single glyph.
+ * This is used by the cairo_show_text() operation.
+ *
+ * This callback is used to provide the same functionality as the
+ * text_to_glyphs callback does (see #cairo_user_scaled_font_text_to_glyphs_func_t)
+ * but has much less control on the output,
+ * in exchange for increased ease of use. The inherent assumption to using
+ * this callback is that each character maps to one glyph, and that the
+ * mapping is context independent. It also assumes that glyphs are positioned
+ * according to their advance width. These mean no ligatures, kerning, or
+ * complex scripts can be implemented using this callback.
+ *
+ * The callback is optional, and only used if text_to_glyphs callback is not
+ * set or fails to return glyphs. If this callback is not set or if it returns
+ * %CAIRO_STATUS_USER_FONT_NOT_IMPLEMENTED, an identity mapping from Unicode
+ * code-points to glyph indices is assumed.
+ *
+ * Note: While cairo does not impose any limitation on glyph indices,
+ * some applications may assume that a glyph index fits in a 16-bit
+ * unsigned integer. As such, it is advised that user-fonts keep their
+ * glyphs in the 0 to 65535 range. Furthermore, some applications may
+ * assume that glyph 0 is a special glyph-not-found glyph. User-fonts
+ * are advised to use glyph 0 for such purposes and do not use that
+ * glyph value for other purposes.
+ *
+ * Returns: %CAIRO_STATUS_SUCCESS upon success,
+ * %CAIRO_STATUS_USER_FONT_NOT_IMPLEMENTED if fallback options should be tried,
+ * or %CAIRO_STATUS_USER_FONT_ERROR or any other error status on error.
+ *
+ * Since: 1.8
+ **/
+typedef cairo_status_t (*cairo_user_scaled_font_unicode_to_glyph_func_t) (cairo_scaled_font_t *scaled_font,
+ unsigned long unicode,
+ unsigned long *glyph_index);
+
+/* User-font method setters */
+
+cairo_public void
+cairo_user_font_face_set_init_func (cairo_font_face_t *font_face,
+ cairo_user_scaled_font_init_func_t init_func);
+
+cairo_public void
+cairo_user_font_face_set_render_glyph_func (cairo_font_face_t *font_face,
+ cairo_user_scaled_font_render_glyph_func_t render_glyph_func);
+
+cairo_public void
+cairo_user_font_face_set_text_to_glyphs_func (cairo_font_face_t *font_face,
+ cairo_user_scaled_font_text_to_glyphs_func_t text_to_glyphs_func);
+
+cairo_public void
+cairo_user_font_face_set_unicode_to_glyph_func (cairo_font_face_t *font_face,
+ cairo_user_scaled_font_unicode_to_glyph_func_t unicode_to_glyph_func);
+
+/* User-font method getters */
+
+cairo_public cairo_user_scaled_font_init_func_t
+cairo_user_font_face_get_init_func (cairo_font_face_t *font_face);
+
+cairo_public cairo_user_scaled_font_render_glyph_func_t
+cairo_user_font_face_get_render_glyph_func (cairo_font_face_t *font_face);
+
+cairo_public cairo_user_scaled_font_text_to_glyphs_func_t
+cairo_user_font_face_get_text_to_glyphs_func (cairo_font_face_t *font_face);
+
+cairo_public cairo_user_scaled_font_unicode_to_glyph_func_t
+cairo_user_font_face_get_unicode_to_glyph_func (cairo_font_face_t *font_face);
+
+
+/* Query functions */
+
+cairo_public cairo_operator_t
+cairo_get_operator (cairo_t *cr);
+
+cairo_public cairo_pattern_t *
+cairo_get_source (cairo_t *cr);
+
+cairo_public double
+cairo_get_tolerance (cairo_t *cr);
+
+cairo_public cairo_antialias_t
+cairo_get_antialias (cairo_t *cr);
+
+cairo_public cairo_bool_t
+cairo_has_current_point (cairo_t *cr);
+
+cairo_public void
+cairo_get_current_point (cairo_t *cr, double *x, double *y);
+
+cairo_public cairo_fill_rule_t
+cairo_get_fill_rule (cairo_t *cr);
+
+cairo_public double
+cairo_get_line_width (cairo_t *cr);
+
+cairo_public cairo_line_cap_t
+cairo_get_line_cap (cairo_t *cr);
+
+cairo_public cairo_line_join_t
+cairo_get_line_join (cairo_t *cr);
+
+cairo_public double
+cairo_get_miter_limit (cairo_t *cr);
+
+cairo_public int
+cairo_get_dash_count (cairo_t *cr);
+
+cairo_public void
+cairo_get_dash (cairo_t *cr, double *dashes, double *offset);
+
+cairo_public void
+cairo_get_matrix (cairo_t *cr, cairo_matrix_t *matrix);
+
+cairo_public cairo_surface_t *
+cairo_get_target (cairo_t *cr);
+
+cairo_public cairo_surface_t *
+cairo_get_group_target (cairo_t *cr);
+
+/**
+ * cairo_path_data_type_t:
+ * @CAIRO_PATH_MOVE_TO: A move-to operation, since 1.0
+ * @CAIRO_PATH_LINE_TO: A line-to operation, since 1.0
+ * @CAIRO_PATH_CURVE_TO: A curve-to operation, since 1.0
+ * @CAIRO_PATH_CLOSE_PATH: A close-path operation, since 1.0
+ *
+ * #cairo_path_data_t is used to describe the type of one portion
+ * of a path when represented as a #cairo_path_t.
+ * See #cairo_path_data_t for details.
+ *
+ * Since: 1.0
+ **/
+typedef enum _cairo_path_data_type {
+ CAIRO_PATH_MOVE_TO,
+ CAIRO_PATH_LINE_TO,
+ CAIRO_PATH_CURVE_TO,
+ CAIRO_PATH_CLOSE_PATH
+} cairo_path_data_type_t;
+
+/**
+ * cairo_path_data_t:
+ *
+ * #cairo_path_data_t is used to represent the path data inside a
+ * #cairo_path_t.
+ *
+ * The data structure is designed to try to balance the demands of
+ * efficiency and ease-of-use. A path is represented as an array of
+ * #cairo_path_data_t, which is a union of headers and points.
+ *
+ * Each portion of the path is represented by one or more elements in
+ * the array, (one header followed by 0 or more points). The length
+ * value of the header is the number of array elements for the current
+ * portion including the header, (ie. length == 1 + # of points), and
+ * where the number of points for each element type is as follows:
+ *
+ * <programlisting>
+ * %CAIRO_PATH_MOVE_TO: 1 point
+ * %CAIRO_PATH_LINE_TO: 1 point
+ * %CAIRO_PATH_CURVE_TO: 3 points
+ * %CAIRO_PATH_CLOSE_PATH: 0 points
+ * </programlisting>
+ *
+ * The semantics and ordering of the coordinate values are consistent
+ * with cairo_move_to(), cairo_line_to(), cairo_curve_to(), and
+ * cairo_close_path().
+ *
+ * Here is sample code for iterating through a #cairo_path_t:
+ *
+ * <informalexample><programlisting>
+ * int i;
+ * cairo_path_t *path;
+ * cairo_path_data_t *data;
+ * &nbsp;
+ * path = cairo_copy_path (cr);
+ * &nbsp;
+ * for (i=0; i < path->num_data; i += path->data[i].header.length) {
+ * data = &amp;path->data[i];
+ * switch (data->header.type) {
+ * case CAIRO_PATH_MOVE_TO:
+ * do_move_to_things (data[1].point.x, data[1].point.y);
+ * break;
+ * case CAIRO_PATH_LINE_TO:
+ * do_line_to_things (data[1].point.x, data[1].point.y);
+ * break;
+ * case CAIRO_PATH_CURVE_TO:
+ * do_curve_to_things (data[1].point.x, data[1].point.y,
+ * data[2].point.x, data[2].point.y,
+ * data[3].point.x, data[3].point.y);
+ * break;
+ * case CAIRO_PATH_CLOSE_PATH:
+ * do_close_path_things ();
+ * break;
+ * }
+ * }
+ * cairo_path_destroy (path);
+ * </programlisting></informalexample>
+ *
+ * As of cairo 1.4, cairo does not mind if there are more elements in
+ * a portion of the path than needed. Such elements can be used by
+ * users of the cairo API to hold extra values in the path data
+ * structure. For this reason, it is recommended that applications
+ * always use <literal>data->header.length</literal> to
+ * iterate over the path data, instead of hardcoding the number of
+ * elements for each element type.
+ *
+ * Since: 1.0
+ **/
+typedef union _cairo_path_data_t cairo_path_data_t;
+union _cairo_path_data_t {
+ struct {
+ cairo_path_data_type_t type;
+ int length;
+ } header;
+ struct {
+ double x, y;
+ } point;
+};
+
+/**
+ * cairo_path_t:
+ * @status: the current error status
+ * @data: the elements in the path
+ * @num_data: the number of elements in the data array
+ *
+ * A data structure for holding a path. This data structure serves as
+ * the return value for cairo_copy_path() and
+ * cairo_copy_path_flat() as well the input value for
+ * cairo_append_path().
+ *
+ * See #cairo_path_data_t for hints on how to iterate over the
+ * actual data within the path.
+ *
+ * The num_data member gives the number of elements in the data
+ * array. This number is larger than the number of independent path
+ * portions (defined in #cairo_path_data_type_t), since the data
+ * includes both headers and coordinates for each portion.
+ *
+ * Since: 1.0
+ **/
+typedef struct cairo_path {
+ cairo_status_t status;
+ cairo_path_data_t *data;
+ int num_data;
+} cairo_path_t;
+
+cairo_public cairo_path_t *
+cairo_copy_path (cairo_t *cr);
+
+cairo_public cairo_path_t *
+cairo_copy_path_flat (cairo_t *cr);
+
+cairo_public void
+cairo_append_path (cairo_t *cr,
+ const cairo_path_t *path);
+
+cairo_public void
+cairo_path_destroy (cairo_path_t *path);
+
+/* Error status queries */
+
+cairo_public cairo_status_t
+cairo_status (cairo_t *cr);
+
+cairo_public const char *
+cairo_status_to_string (cairo_status_t status);
+
+/* Backend device manipulation */
+
+cairo_public cairo_device_t *
+cairo_device_reference (cairo_device_t *device);
+
+/**
+ * cairo_device_type_t:
+ * @CAIRO_DEVICE_TYPE_DRM: The device is of type Direct Render Manager, since 1.10
+ * @CAIRO_DEVICE_TYPE_GL: The device is of type OpenGL, since 1.10
+ * @CAIRO_DEVICE_TYPE_SCRIPT: The device is of type script, since 1.10
+ * @CAIRO_DEVICE_TYPE_XCB: The device is of type xcb, since 1.10
+ * @CAIRO_DEVICE_TYPE_XLIB: The device is of type xlib, since 1.10
+ * @CAIRO_DEVICE_TYPE_XML: The device is of type XML, since 1.10
+ * @CAIRO_DEVICE_TYPE_COGL: The device is of type cogl, since 1.12
+ * @CAIRO_DEVICE_TYPE_WIN32: The device is of type win32, since 1.12
+ * @CAIRO_DEVICE_TYPE_INVALID: The device is invalid, since 1.10
+ *
+ * #cairo_device_type_t is used to describe the type of a given
+ * device. The devices types are also known as "backends" within cairo.
+ *
+ * The device type can be queried with cairo_device_get_type()
+ *
+ * The various #cairo_device_t functions can be used with devices of
+ * any type, but some backends also provide type-specific functions
+ * that must only be called with a device of the appropriate
+ * type. These functions have names that begin with
+ * <literal>cairo_<emphasis>type</emphasis>_device</literal> such as
+ * cairo_xcb_device_debug_cap_xrender_version().
+ *
+ * The behavior of calling a type-specific function with a device of
+ * the wrong type is undefined.
+ *
+ * New entries may be added in future versions.
+ *
+ * Since: 1.10
+ **/
+typedef enum _cairo_device_type {
+ CAIRO_DEVICE_TYPE_DRM,
+ CAIRO_DEVICE_TYPE_GL,
+ CAIRO_DEVICE_TYPE_SCRIPT,
+ CAIRO_DEVICE_TYPE_XCB,
+ CAIRO_DEVICE_TYPE_XLIB,
+ CAIRO_DEVICE_TYPE_XML,
+ CAIRO_DEVICE_TYPE_COGL,
+ CAIRO_DEVICE_TYPE_WIN32,
+
+ CAIRO_DEVICE_TYPE_INVALID = -1
+} cairo_device_type_t;
+
+cairo_public cairo_device_type_t
+cairo_device_get_type (cairo_device_t *device);
+
+cairo_public cairo_status_t
+cairo_device_status (cairo_device_t *device);
+
+cairo_public cairo_status_t
+cairo_device_acquire (cairo_device_t *device);
+
+cairo_public void
+cairo_device_release (cairo_device_t *device);
+
+cairo_public void
+cairo_device_flush (cairo_device_t *device);
+
+cairo_public void
+cairo_device_finish (cairo_device_t *device);
+
+cairo_public void
+cairo_device_destroy (cairo_device_t *device);
+
+cairo_public unsigned int
+cairo_device_get_reference_count (cairo_device_t *device);
+
+cairo_public void *
+cairo_device_get_user_data (cairo_device_t *device,
+ const cairo_user_data_key_t *key);
+
+cairo_public cairo_status_t
+cairo_device_set_user_data (cairo_device_t *device,
+ const cairo_user_data_key_t *key,
+ void *user_data,
+ cairo_destroy_func_t destroy);
+
+
+/* Surface manipulation */
+
+cairo_public cairo_surface_t *
+cairo_surface_create_similar (cairo_surface_t *other,
+ cairo_content_t content,
+ int width,
+ int height);
+
+cairo_public cairo_surface_t *
+cairo_surface_create_similar_image (cairo_surface_t *other,
+ cairo_format_t format,
+ int width,
+ int height);
+
+cairo_public cairo_surface_t *
+cairo_surface_map_to_image (cairo_surface_t *surface,
+ const cairo_rectangle_int_t *extents);
+
+cairo_public void
+cairo_surface_unmap_image (cairo_surface_t *surface,
+ cairo_surface_t *image);
+
+cairo_public cairo_surface_t *
+cairo_surface_create_for_rectangle (cairo_surface_t *target,
+ double x,
+ double y,
+ double width,
+ double height);
+
+typedef enum {
+ CAIRO_SURFACE_OBSERVER_NORMAL = 0,
+ CAIRO_SURFACE_OBSERVER_RECORD_OPERATIONS = 0x1
+} cairo_surface_observer_mode_t;
+
+cairo_public cairo_surface_t *
+cairo_surface_create_observer (cairo_surface_t *target,
+ cairo_surface_observer_mode_t mode);
+
+typedef void (*cairo_surface_observer_callback_t) (cairo_surface_t *observer,
+ cairo_surface_t *target,
+ void *data);
+
+cairo_public cairo_status_t
+cairo_surface_observer_add_paint_callback (cairo_surface_t *abstract_surface,
+ cairo_surface_observer_callback_t func,
+ void *data);
+
+cairo_public cairo_status_t
+cairo_surface_observer_add_mask_callback (cairo_surface_t *abstract_surface,
+ cairo_surface_observer_callback_t func,
+ void *data);
+
+cairo_public cairo_status_t
+cairo_surface_observer_add_fill_callback (cairo_surface_t *abstract_surface,
+ cairo_surface_observer_callback_t func,
+ void *data);
+
+cairo_public cairo_status_t
+cairo_surface_observer_add_stroke_callback (cairo_surface_t *abstract_surface,
+ cairo_surface_observer_callback_t func,
+ void *data);
+
+cairo_public cairo_status_t
+cairo_surface_observer_add_glyphs_callback (cairo_surface_t *abstract_surface,
+ cairo_surface_observer_callback_t func,
+ void *data);
+
+cairo_public cairo_status_t
+cairo_surface_observer_add_flush_callback (cairo_surface_t *abstract_surface,
+ cairo_surface_observer_callback_t func,
+ void *data);
+
+cairo_public cairo_status_t
+cairo_surface_observer_add_finish_callback (cairo_surface_t *abstract_surface,
+ cairo_surface_observer_callback_t func,
+ void *data);
+
+cairo_public cairo_status_t
+cairo_surface_observer_print (cairo_surface_t *surface,
+ cairo_write_func_t write_func,
+ void *closure);
+cairo_public double
+cairo_surface_observer_elapsed (cairo_surface_t *surface);
+
+cairo_public cairo_status_t
+cairo_device_observer_print (cairo_device_t *device,
+ cairo_write_func_t write_func,
+ void *closure);
+
+cairo_public double
+cairo_device_observer_elapsed (cairo_device_t *device);
+
+cairo_public double
+cairo_device_observer_paint_elapsed (cairo_device_t *device);
+
+cairo_public double
+cairo_device_observer_mask_elapsed (cairo_device_t *device);
+
+cairo_public double
+cairo_device_observer_fill_elapsed (cairo_device_t *device);
+
+cairo_public double
+cairo_device_observer_stroke_elapsed (cairo_device_t *device);
+
+cairo_public double
+cairo_device_observer_glyphs_elapsed (cairo_device_t *device);
+
+cairo_public cairo_surface_t *
+cairo_surface_reference (cairo_surface_t *surface);
+
+cairo_public void
+cairo_surface_finish (cairo_surface_t *surface);
+
+cairo_public void
+cairo_surface_destroy (cairo_surface_t *surface);
+
+cairo_public cairo_device_t *
+cairo_surface_get_device (cairo_surface_t *surface);
+
+cairo_public unsigned int
+cairo_surface_get_reference_count (cairo_surface_t *surface);
+
+cairo_public cairo_status_t
+cairo_surface_status (cairo_surface_t *surface);
+
+/**
+ * cairo_surface_type_t:
+ * @CAIRO_SURFACE_TYPE_IMAGE: The surface is of type image, since 1.2
+ * @CAIRO_SURFACE_TYPE_PDF: The surface is of type pdf, since 1.2
+ * @CAIRO_SURFACE_TYPE_PS: The surface is of type ps, since 1.2
+ * @CAIRO_SURFACE_TYPE_XLIB: The surface is of type xlib, since 1.2
+ * @CAIRO_SURFACE_TYPE_XCB: The surface is of type xcb, since 1.2
+ * @CAIRO_SURFACE_TYPE_GLITZ: The surface is of type glitz, since 1.2
+ * @CAIRO_SURFACE_TYPE_QUARTZ: The surface is of type quartz, since 1.2
+ * @CAIRO_SURFACE_TYPE_WIN32: The surface is of type win32, since 1.2
+ * @CAIRO_SURFACE_TYPE_BEOS: The surface is of type beos, since 1.2
+ * @CAIRO_SURFACE_TYPE_DIRECTFB: The surface is of type directfb, since 1.2
+ * @CAIRO_SURFACE_TYPE_SVG: The surface is of type svg, since 1.2
+ * @CAIRO_SURFACE_TYPE_OS2: The surface is of type os2, since 1.4
+ * @CAIRO_SURFACE_TYPE_WIN32_PRINTING: The surface is a win32 printing surface, since 1.6
+ * @CAIRO_SURFACE_TYPE_QUARTZ_IMAGE: The surface is of type quartz_image, since 1.6
+ * @CAIRO_SURFACE_TYPE_SCRIPT: The surface is of type script, since 1.10
+ * @CAIRO_SURFACE_TYPE_QT: The surface is of type Qt, since 1.10
+ * @CAIRO_SURFACE_TYPE_RECORDING: The surface is of type recording, since 1.10
+ * @CAIRO_SURFACE_TYPE_VG: The surface is a OpenVG surface, since 1.10
+ * @CAIRO_SURFACE_TYPE_GL: The surface is of type OpenGL, since 1.10
+ * @CAIRO_SURFACE_TYPE_DRM: The surface is of type Direct Render Manager, since 1.10
+ * @CAIRO_SURFACE_TYPE_TEE: The surface is of type 'tee' (a multiplexing surface), since 1.10
+ * @CAIRO_SURFACE_TYPE_XML: The surface is of type XML (for debugging), since 1.10
+ * @CAIRO_SURFACE_TYPE_SKIA: The surface is of type Skia, since 1.10
+ * @CAIRO_SURFACE_TYPE_SUBSURFACE: The surface is a subsurface created with
+ * cairo_surface_create_for_rectangle(), since 1.10
+ * @CAIRO_SURFACE_TYPE_COGL: This surface is of type Cogl, since 1.12
+ *
+ * #cairo_surface_type_t is used to describe the type of a given
+ * surface. The surface types are also known as "backends" or "surface
+ * backends" within cairo.
+ *
+ * The type of a surface is determined by the function used to create
+ * it, which will generally be of the form
+ * <function>cairo_<emphasis>type</emphasis>_surface_create(<!-- -->)</function>,
+ * (though see cairo_surface_create_similar() as well).
+ *
+ * The surface type can be queried with cairo_surface_get_type()
+ *
+ * The various #cairo_surface_t functions can be used with surfaces of
+ * any type, but some backends also provide type-specific functions
+ * that must only be called with a surface of the appropriate
+ * type. These functions have names that begin with
+ * <literal>cairo_<emphasis>type</emphasis>_surface</literal> such as cairo_image_surface_get_width().
+ *
+ * The behavior of calling a type-specific function with a surface of
+ * the wrong type is undefined.
+ *
+ * New entries may be added in future versions.
+ *
+ * Since: 1.2
+ **/
+typedef enum _cairo_surface_type {
+ CAIRO_SURFACE_TYPE_IMAGE,
+ CAIRO_SURFACE_TYPE_PDF,
+ CAIRO_SURFACE_TYPE_PS,
+ CAIRO_SURFACE_TYPE_XLIB,
+ CAIRO_SURFACE_TYPE_XCB,
+ CAIRO_SURFACE_TYPE_GLITZ,
+ CAIRO_SURFACE_TYPE_QUARTZ,
+ CAIRO_SURFACE_TYPE_WIN32,
+ CAIRO_SURFACE_TYPE_BEOS,
+ CAIRO_SURFACE_TYPE_DIRECTFB,
+ CAIRO_SURFACE_TYPE_SVG,
+ CAIRO_SURFACE_TYPE_OS2,
+ CAIRO_SURFACE_TYPE_WIN32_PRINTING,
+ CAIRO_SURFACE_TYPE_QUARTZ_IMAGE,
+ CAIRO_SURFACE_TYPE_SCRIPT,
+ CAIRO_SURFACE_TYPE_QT,
+ CAIRO_SURFACE_TYPE_RECORDING,
+ CAIRO_SURFACE_TYPE_VG,
+ CAIRO_SURFACE_TYPE_GL,
+ CAIRO_SURFACE_TYPE_DRM,
+ CAIRO_SURFACE_TYPE_TEE,
+ CAIRO_SURFACE_TYPE_XML,
+ CAIRO_SURFACE_TYPE_SKIA,
+ CAIRO_SURFACE_TYPE_SUBSURFACE,
+ CAIRO_SURFACE_TYPE_COGL
+} cairo_surface_type_t;
+
+cairo_public cairo_surface_type_t
+cairo_surface_get_type (cairo_surface_t *surface);
+
+cairo_public cairo_content_t
+cairo_surface_get_content (cairo_surface_t *surface);
+
+#if CAIRO_HAS_PNG_FUNCTIONS
+
+cairo_public cairo_status_t
+cairo_surface_write_to_png (cairo_surface_t *surface,
+ const char *filename);
+
+cairo_public cairo_status_t
+cairo_surface_write_to_png_stream (cairo_surface_t *surface,
+ cairo_write_func_t write_func,
+ void *closure);
+
+#endif
+
+cairo_public void *
+cairo_surface_get_user_data (cairo_surface_t *surface,
+ const cairo_user_data_key_t *key);
+
+cairo_public cairo_status_t
+cairo_surface_set_user_data (cairo_surface_t *surface,
+ const cairo_user_data_key_t *key,
+ void *user_data,
+ cairo_destroy_func_t destroy);
+
+#define CAIRO_MIME_TYPE_JPEG "image/jpeg"
+#define CAIRO_MIME_TYPE_PNG "image/png"
+#define CAIRO_MIME_TYPE_JP2 "image/jp2"
+#define CAIRO_MIME_TYPE_URI "text/x-uri"
+#define CAIRO_MIME_TYPE_UNIQUE_ID "application/x-cairo.uuid"
+
+cairo_public void
+cairo_surface_get_mime_data (cairo_surface_t *surface,
+ const char *mime_type,
+ const unsigned char **data,
+ unsigned long *length);
+
+cairo_public cairo_status_t
+cairo_surface_set_mime_data (cairo_surface_t *surface,
+ const char *mime_type,
+ const unsigned char *data,
+ unsigned long length,
+ cairo_destroy_func_t destroy,
+ void *closure);
+
+cairo_public cairo_bool_t
+cairo_surface_supports_mime_type (cairo_surface_t *surface,
+ const char *mime_type);
+
+cairo_public void
+cairo_surface_get_font_options (cairo_surface_t *surface,
+ cairo_font_options_t *options);
+
+cairo_public void
+cairo_surface_flush (cairo_surface_t *surface);
+
+cairo_public void
+cairo_surface_mark_dirty (cairo_surface_t *surface);
+
+cairo_public void
+cairo_surface_mark_dirty_rectangle (cairo_surface_t *surface,
+ int x,
+ int y,
+ int width,
+ int height);
+
+cairo_public void
+cairo_surface_set_device_offset (cairo_surface_t *surface,
+ double x_offset,
+ double y_offset);
+
+cairo_public void
+cairo_surface_get_device_offset (cairo_surface_t *surface,
+ double *x_offset,
+ double *y_offset);
+
+cairo_public void
+cairo_surface_set_fallback_resolution (cairo_surface_t *surface,
+ double x_pixels_per_inch,
+ double y_pixels_per_inch);
+
+cairo_public void
+cairo_surface_get_fallback_resolution (cairo_surface_t *surface,
+ double *x_pixels_per_inch,
+ double *y_pixels_per_inch);
+
+cairo_public void
+cairo_surface_copy_page (cairo_surface_t *surface);
+
+cairo_public void
+cairo_surface_show_page (cairo_surface_t *surface);
+
+cairo_public cairo_bool_t
+cairo_surface_has_show_text_glyphs (cairo_surface_t *surface);
+
+/* Image-surface functions */
+
+cairo_public cairo_surface_t *
+cairo_image_surface_create (cairo_format_t format,
+ int width,
+ int height);
+
+cairo_public int
+cairo_format_stride_for_width (cairo_format_t format,
+ int width);
+
+cairo_public cairo_surface_t *
+cairo_image_surface_create_for_data (unsigned char *data,
+ cairo_format_t format,
+ int width,
+ int height,
+ int stride);
+
+cairo_public unsigned char *
+cairo_image_surface_get_data (cairo_surface_t *surface);
+
+cairo_public cairo_format_t
+cairo_image_surface_get_format (cairo_surface_t *surface);
+
+cairo_public int
+cairo_image_surface_get_width (cairo_surface_t *surface);
+
+cairo_public int
+cairo_image_surface_get_height (cairo_surface_t *surface);
+
+cairo_public int
+cairo_image_surface_get_stride (cairo_surface_t *surface);
+
+#if CAIRO_HAS_PNG_FUNCTIONS
+
+cairo_public cairo_surface_t *
+cairo_image_surface_create_from_png (const char *filename);
+
+cairo_public cairo_surface_t *
+cairo_image_surface_create_from_png_stream (cairo_read_func_t read_func,
+ void *closure);
+
+#endif
+
+/* Recording-surface functions */
+
+cairo_public cairo_surface_t *
+cairo_recording_surface_create (cairo_content_t content,
+ const cairo_rectangle_t *extents);
+
+cairo_public void
+cairo_recording_surface_ink_extents (cairo_surface_t *surface,
+ double *x0,
+ double *y0,
+ double *width,
+ double *height);
+
+cairo_public cairo_bool_t
+cairo_recording_surface_get_extents (cairo_surface_t *surface,
+ cairo_rectangle_t *extents);
+
+/* raster-source pattern (callback) functions */
+
+/**
+ * cairo_raster_source_acquire_func_t:
+ * @pattern: the pattern being rendered from
+ * @callback_data: the user data supplied during creation
+ * @target: the rendering target surface
+ * @extents: rectangular region of interest in pixels in sample space
+ *
+ * #cairo_raster_source_acquire_func_t is the type of function which is
+ * called when a pattern is being rendered from. It should create a surface
+ * that provides the pixel data for the region of interest as defined by
+ * extents, though the surface itself does not have to be limited to that
+ * area. For convenience the surface should probably be of image type,
+ * created with cairo_surface_create_similar_image() for the target (which
+ * enables the number of copies to be reduced during transfer to the
+ * device). Another option, might be to return a similar surface to the
+ * target for explicit handling by the application of a set of cached sources
+ * on the device. The region of sample data provided should be defined using
+ * cairo_surface_set_device_offset() to specify the top-left corner of the
+ * sample data (along with width and height of the surface).
+ *
+ * Returns: a #cairo_surface_t
+ *
+ * Since: 1.12
+ **/
+typedef cairo_surface_t *
+(*cairo_raster_source_acquire_func_t) (cairo_pattern_t *pattern,
+ void *callback_data,
+ cairo_surface_t *target,
+ const cairo_rectangle_int_t *extents);
+
+/**
+ * cairo_raster_source_release_func_t:
+ * @pattern: the pattern being rendered from
+ * @callback_data: the user data supplied during creation
+ * @surface: the surface created during acquire
+ *
+ * #cairo_raster_source_release_func_t is the type of function which is
+ * called when the pixel data is no longer being access by the pattern
+ * for the rendering operation. Typically this function will simply
+ * destroy the surface created during acquire.
+ *
+ * Since: 1.12
+ **/
+typedef void
+(*cairo_raster_source_release_func_t) (cairo_pattern_t *pattern,
+ void *callback_data,
+ cairo_surface_t *surface);
+
+/**
+ * cairo_raster_source_snapshot_func_t:
+ * @pattern: the pattern being rendered from
+ * @callback_data: the user data supplied during creation
+ *
+ * #cairo_raster_source_snapshot_func_t is the type of function which is
+ * called when the pixel data needs to be preserved for later use
+ * during printing. This pattern will be accessed again later, and it
+ * is expected to provide the pixel data that was current at the time
+ * of snapshotting.
+ *
+ * Return value: CAIRO_STATUS_SUCCESS on success, or one of the
+ * #cairo_status_t error codes for failure.
+ *
+ * Since: 1.12
+ **/
+typedef cairo_status_t
+(*cairo_raster_source_snapshot_func_t) (cairo_pattern_t *pattern,
+ void *callback_data);
+
+/**
+ * cairo_raster_source_copy_func_t:
+ * @pattern: the #cairo_pattern_t that was copied to
+ * @callback_data: the user data supplied during creation
+ * @other: the #cairo_pattern_t being used as the source for the copy
+ *
+ * #cairo_raster_source_copy_func_t is the type of function which is
+ * called when the pattern gets copied as a normal part of rendering.
+ *
+ * Return value: CAIRO_STATUS_SUCCESS on success, or one of the
+ * #cairo_status_t error codes for failure.
+ *
+ * Since: 1.12
+ **/
+typedef cairo_status_t
+(*cairo_raster_source_copy_func_t) (cairo_pattern_t *pattern,
+ void *callback_data,
+ const cairo_pattern_t *other);
+
+/**
+ * cairo_raster_source_finish_func_t:
+ * @pattern: the pattern being rendered from
+ * @callback_data: the user data supplied during creation
+ *
+ * #cairo_raster_source_finish_func_t is the type of function which is
+ * called when the pattern (or a copy thereof) is no longer required.
+ *
+ * Since: 1.12
+ **/
+typedef void
+(*cairo_raster_source_finish_func_t) (cairo_pattern_t *pattern,
+ void *callback_data);
+
+cairo_public cairo_pattern_t *
+cairo_pattern_create_raster_source (void *user_data,
+ cairo_content_t content,
+ int width, int height);
+
+cairo_public void
+cairo_raster_source_pattern_set_callback_data (cairo_pattern_t *pattern,
+ void *data);
+
+cairo_public void *
+cairo_raster_source_pattern_get_callback_data (cairo_pattern_t *pattern);
+
+cairo_public void
+cairo_raster_source_pattern_set_acquire (cairo_pattern_t *pattern,
+ cairo_raster_source_acquire_func_t acquire,
+ cairo_raster_source_release_func_t release);
+
+cairo_public void
+cairo_raster_source_pattern_get_acquire (cairo_pattern_t *pattern,
+ cairo_raster_source_acquire_func_t *acquire,
+ cairo_raster_source_release_func_t *release);
+cairo_public void
+cairo_raster_source_pattern_set_snapshot (cairo_pattern_t *pattern,
+ cairo_raster_source_snapshot_func_t snapshot);
+
+cairo_public cairo_raster_source_snapshot_func_t
+cairo_raster_source_pattern_get_snapshot (cairo_pattern_t *pattern);
+
+cairo_public void
+cairo_raster_source_pattern_set_copy (cairo_pattern_t *pattern,
+ cairo_raster_source_copy_func_t copy);
+
+cairo_public cairo_raster_source_copy_func_t
+cairo_raster_source_pattern_get_copy (cairo_pattern_t *pattern);
+
+cairo_public void
+cairo_raster_source_pattern_set_finish (cairo_pattern_t *pattern,
+ cairo_raster_source_finish_func_t finish);
+
+cairo_public cairo_raster_source_finish_func_t
+cairo_raster_source_pattern_get_finish (cairo_pattern_t *pattern);
+
+/* Pattern creation functions */
+
+cairo_public cairo_pattern_t *
+cairo_pattern_create_rgb (double red, double green, double blue);
+
+cairo_public cairo_pattern_t *
+cairo_pattern_create_rgba (double red, double green, double blue,
+ double alpha);
+
+cairo_public cairo_pattern_t *
+cairo_pattern_create_for_surface (cairo_surface_t *surface);
+
+cairo_public cairo_pattern_t *
+cairo_pattern_create_linear (double x0, double y0,
+ double x1, double y1);
+
+cairo_public cairo_pattern_t *
+cairo_pattern_create_radial (double cx0, double cy0, double radius0,
+ double cx1, double cy1, double radius1);
+
+cairo_public cairo_pattern_t *
+cairo_pattern_create_mesh (void);
+
+cairo_public cairo_pattern_t *
+cairo_pattern_reference (cairo_pattern_t *pattern);
+
+cairo_public void
+cairo_pattern_destroy (cairo_pattern_t *pattern);
+
+cairo_public unsigned int
+cairo_pattern_get_reference_count (cairo_pattern_t *pattern);
+
+cairo_public cairo_status_t
+cairo_pattern_status (cairo_pattern_t *pattern);
+
+cairo_public void *
+cairo_pattern_get_user_data (cairo_pattern_t *pattern,
+ const cairo_user_data_key_t *key);
+
+cairo_public cairo_status_t
+cairo_pattern_set_user_data (cairo_pattern_t *pattern,
+ const cairo_user_data_key_t *key,
+ void *user_data,
+ cairo_destroy_func_t destroy);
+
+/**
+ * cairo_pattern_type_t:
+ * @CAIRO_PATTERN_TYPE_SOLID: The pattern is a solid (uniform)
+ * color. It may be opaque or translucent, since 1.2.
+ * @CAIRO_PATTERN_TYPE_SURFACE: The pattern is a based on a surface (an image), since 1.2.
+ * @CAIRO_PATTERN_TYPE_LINEAR: The pattern is a linear gradient, since 1.2.
+ * @CAIRO_PATTERN_TYPE_RADIAL: The pattern is a radial gradient, since 1.2.
+ * @CAIRO_PATTERN_TYPE_MESH: The pattern is a mesh, since 1.12.
+ * @CAIRO_PATTERN_TYPE_RASTER_SOURCE: The pattern is a user pattern providing raster data, since 1.12.
+ *
+ * #cairo_pattern_type_t is used to describe the type of a given pattern.
+ *
+ * The type of a pattern is determined by the function used to create
+ * it. The cairo_pattern_create_rgb() and cairo_pattern_create_rgba()
+ * functions create SOLID patterns. The remaining
+ * cairo_pattern_create<!-- --> functions map to pattern types in obvious
+ * ways.
+ *
+ * The pattern type can be queried with cairo_pattern_get_type()
+ *
+ * Most #cairo_pattern_t functions can be called with a pattern of any
+ * type, (though trying to change the extend or filter for a solid
+ * pattern will have no effect). A notable exception is
+ * cairo_pattern_add_color_stop_rgb() and
+ * cairo_pattern_add_color_stop_rgba() which must only be called with
+ * gradient patterns (either LINEAR or RADIAL). Otherwise the pattern
+ * will be shutdown and put into an error state.
+ *
+ * New entries may be added in future versions.
+ *
+ * Since: 1.2
+ **/
+typedef enum _cairo_pattern_type {
+ CAIRO_PATTERN_TYPE_SOLID,
+ CAIRO_PATTERN_TYPE_SURFACE,
+ CAIRO_PATTERN_TYPE_LINEAR,
+ CAIRO_PATTERN_TYPE_RADIAL,
+ CAIRO_PATTERN_TYPE_MESH,
+ CAIRO_PATTERN_TYPE_RASTER_SOURCE
+} cairo_pattern_type_t;
+
+cairo_public cairo_pattern_type_t
+cairo_pattern_get_type (cairo_pattern_t *pattern);
+
+cairo_public void
+cairo_pattern_add_color_stop_rgb (cairo_pattern_t *pattern,
+ double offset,
+ double red, double green, double blue);
+
+cairo_public void
+cairo_pattern_add_color_stop_rgba (cairo_pattern_t *pattern,
+ double offset,
+ double red, double green, double blue,
+ double alpha);
+
+cairo_public void
+cairo_mesh_pattern_begin_patch (cairo_pattern_t *pattern);
+
+cairo_public void
+cairo_mesh_pattern_end_patch (cairo_pattern_t *pattern);
+
+cairo_public void
+cairo_mesh_pattern_curve_to (cairo_pattern_t *pattern,
+ double x1, double y1,
+ double x2, double y2,
+ double x3, double y3);
+
+cairo_public void
+cairo_mesh_pattern_line_to (cairo_pattern_t *pattern,
+ double x, double y);
+
+cairo_public void
+cairo_mesh_pattern_move_to (cairo_pattern_t *pattern,
+ double x, double y);
+
+cairo_public void
+cairo_mesh_pattern_set_control_point (cairo_pattern_t *pattern,
+ unsigned int point_num,
+ double x, double y);
+
+cairo_public void
+cairo_mesh_pattern_set_corner_color_rgb (cairo_pattern_t *pattern,
+ unsigned int corner_num,
+ double red, double green, double blue);
+
+cairo_public void
+cairo_mesh_pattern_set_corner_color_rgba (cairo_pattern_t *pattern,
+ unsigned int corner_num,
+ double red, double green, double blue,
+ double alpha);
+
+cairo_public void
+cairo_pattern_set_matrix (cairo_pattern_t *pattern,
+ const cairo_matrix_t *matrix);
+
+cairo_public void
+cairo_pattern_get_matrix (cairo_pattern_t *pattern,
+ cairo_matrix_t *matrix);
+
+/**
+ * cairo_extend_t:
+ * @CAIRO_EXTEND_NONE: pixels outside of the source pattern
+ * are fully transparent (Since 1.0)
+ * @CAIRO_EXTEND_REPEAT: the pattern is tiled by repeating (Since 1.0)
+ * @CAIRO_EXTEND_REFLECT: the pattern is tiled by reflecting
+ * at the edges (Since 1.0; but only implemented for surface patterns since 1.6)
+ * @CAIRO_EXTEND_PAD: pixels outside of the pattern copy
+ * the closest pixel from the source (Since 1.2; but only
+ * implemented for surface patterns since 1.6)
+ *
+ * #cairo_extend_t is used to describe how pattern color/alpha will be
+ * determined for areas "outside" the pattern's natural area, (for
+ * example, outside the surface bounds or outside the gradient
+ * geometry).
+ *
+ * Mesh patterns are not affected by the extend mode.
+ *
+ * The default extend mode is %CAIRO_EXTEND_NONE for surface patterns
+ * and %CAIRO_EXTEND_PAD for gradient patterns.
+ *
+ * New entries may be added in future versions.
+ *
+ * Since: 1.0
+ **/
+typedef enum _cairo_extend {
+ CAIRO_EXTEND_NONE,
+ CAIRO_EXTEND_REPEAT,
+ CAIRO_EXTEND_REFLECT,
+ CAIRO_EXTEND_PAD
+} cairo_extend_t;
+
+cairo_public void
+cairo_pattern_set_extend (cairo_pattern_t *pattern, cairo_extend_t extend);
+
+cairo_public cairo_extend_t
+cairo_pattern_get_extend (cairo_pattern_t *pattern);
+
+/**
+ * cairo_filter_t:
+ * @CAIRO_FILTER_FAST: A high-performance filter, with quality similar
+ * to %CAIRO_FILTER_NEAREST (Since 1.0)
+ * @CAIRO_FILTER_GOOD: A reasonable-performance filter, with quality
+ * similar to %CAIRO_FILTER_BILINEAR (Since 1.0)
+ * @CAIRO_FILTER_BEST: The highest-quality available, performance may
+ * not be suitable for interactive use. (Since 1.0)
+ * @CAIRO_FILTER_NEAREST: Nearest-neighbor filtering (Since 1.0)
+ * @CAIRO_FILTER_BILINEAR: Linear interpolation in two dimensions (Since 1.0)
+ * @CAIRO_FILTER_GAUSSIAN: This filter value is currently
+ * unimplemented, and should not be used in current code. (Since 1.0)
+ *
+ * #cairo_filter_t is used to indicate what filtering should be
+ * applied when reading pixel values from patterns. See
+ * cairo_pattern_set_filter() for indicating the desired filter to be
+ * used with a particular pattern.
+ *
+ * Since: 1.0
+ **/
+typedef enum _cairo_filter {
+ CAIRO_FILTER_FAST,
+ CAIRO_FILTER_GOOD,
+ CAIRO_FILTER_BEST,
+ CAIRO_FILTER_NEAREST,
+ CAIRO_FILTER_BILINEAR,
+ CAIRO_FILTER_GAUSSIAN
+} cairo_filter_t;
+
+cairo_public void
+cairo_pattern_set_filter (cairo_pattern_t *pattern, cairo_filter_t filter);
+
+cairo_public cairo_filter_t
+cairo_pattern_get_filter (cairo_pattern_t *pattern);
+
+cairo_public cairo_status_t
+cairo_pattern_get_rgba (cairo_pattern_t *pattern,
+ double *red, double *green,
+ double *blue, double *alpha);
+
+cairo_public cairo_status_t
+cairo_pattern_get_surface (cairo_pattern_t *pattern,
+ cairo_surface_t **surface);
+
+
+cairo_public cairo_status_t
+cairo_pattern_get_color_stop_rgba (cairo_pattern_t *pattern,
+ int index, double *offset,
+ double *red, double *green,
+ double *blue, double *alpha);
+
+cairo_public cairo_status_t
+cairo_pattern_get_color_stop_count (cairo_pattern_t *pattern,
+ int *count);
+
+cairo_public cairo_status_t
+cairo_pattern_get_linear_points (cairo_pattern_t *pattern,
+ double *x0, double *y0,
+ double *x1, double *y1);
+
+cairo_public cairo_status_t
+cairo_pattern_get_radial_circles (cairo_pattern_t *pattern,
+ double *x0, double *y0, double *r0,
+ double *x1, double *y1, double *r1);
+
+cairo_public cairo_status_t
+cairo_mesh_pattern_get_patch_count (cairo_pattern_t *pattern,
+ unsigned int *count);
+
+cairo_public cairo_path_t *
+cairo_mesh_pattern_get_path (cairo_pattern_t *pattern,
+ unsigned int patch_num);
+
+cairo_public cairo_status_t
+cairo_mesh_pattern_get_corner_color_rgba (cairo_pattern_t *pattern,
+ unsigned int patch_num,
+ unsigned int corner_num,
+ double *red, double *green,
+ double *blue, double *alpha);
+
+cairo_public cairo_status_t
+cairo_mesh_pattern_get_control_point (cairo_pattern_t *pattern,
+ unsigned int patch_num,
+ unsigned int point_num,
+ double *x, double *y);
+
+/* Matrix functions */
+
+cairo_public void
+cairo_matrix_init (cairo_matrix_t *matrix,
+ double xx, double yx,
+ double xy, double yy,
+ double x0, double y0);
+
+cairo_public void
+cairo_matrix_init_identity (cairo_matrix_t *matrix);
+
+cairo_public void
+cairo_matrix_init_translate (cairo_matrix_t *matrix,
+ double tx, double ty);
+
+cairo_public void
+cairo_matrix_init_scale (cairo_matrix_t *matrix,
+ double sx, double sy);
+
+cairo_public void
+cairo_matrix_init_rotate (cairo_matrix_t *matrix,
+ double radians);
+
+cairo_public void
+cairo_matrix_translate (cairo_matrix_t *matrix, double tx, double ty);
+
+cairo_public void
+cairo_matrix_scale (cairo_matrix_t *matrix, double sx, double sy);
+
+cairo_public void
+cairo_matrix_rotate (cairo_matrix_t *matrix, double radians);
+
+cairo_public cairo_status_t
+cairo_matrix_invert (cairo_matrix_t *matrix);
+
+cairo_public void
+cairo_matrix_multiply (cairo_matrix_t *result,
+ const cairo_matrix_t *a,
+ const cairo_matrix_t *b);
+
+cairo_public void
+cairo_matrix_transform_distance (const cairo_matrix_t *matrix,
+ double *dx, double *dy);
+
+cairo_public void
+cairo_matrix_transform_point (const cairo_matrix_t *matrix,
+ double *x, double *y);
+
+/* Region functions */
+
+/**
+ * cairo_region_t:
+ *
+ * A #cairo_region_t represents a set of integer-aligned rectangles.
+ *
+ * It allows set-theoretical operations like cairo_region_union() and
+ * cairo_region_intersect() to be performed on them.
+ *
+ * Memory management of #cairo_region_t is done with
+ * cairo_region_reference() and cairo_region_destroy().
+ *
+ * Since: 1.10
+ **/
+typedef struct _cairo_region cairo_region_t;
+
+typedef enum _cairo_region_overlap {
+ CAIRO_REGION_OVERLAP_IN, /* completely inside region */
+ CAIRO_REGION_OVERLAP_OUT, /* completely outside region */
+ CAIRO_REGION_OVERLAP_PART /* partly inside region */
+} cairo_region_overlap_t;
+
+cairo_public cairo_region_t *
+cairo_region_create (void);
+
+cairo_public cairo_region_t *
+cairo_region_create_rectangle (const cairo_rectangle_int_t *rectangle);
+
+cairo_public cairo_region_t *
+cairo_region_create_rectangles (const cairo_rectangle_int_t *rects,
+ int count);
+
+cairo_public cairo_region_t *
+cairo_region_copy (const cairo_region_t *original);
+
+cairo_public cairo_region_t *
+cairo_region_reference (cairo_region_t *region);
+
+cairo_public void
+cairo_region_destroy (cairo_region_t *region);
+
+cairo_public cairo_bool_t
+cairo_region_equal (const cairo_region_t *a, const cairo_region_t *b);
+
+cairo_public cairo_status_t
+cairo_region_status (const cairo_region_t *region);
+
+cairo_public void
+cairo_region_get_extents (const cairo_region_t *region,
+ cairo_rectangle_int_t *extents);
+
+cairo_public int
+cairo_region_num_rectangles (const cairo_region_t *region);
+
+cairo_public void
+cairo_region_get_rectangle (const cairo_region_t *region,
+ int nth,
+ cairo_rectangle_int_t *rectangle);
+
+cairo_public cairo_bool_t
+cairo_region_is_empty (const cairo_region_t *region);
+
+cairo_public cairo_region_overlap_t
+cairo_region_contains_rectangle (const cairo_region_t *region,
+ const cairo_rectangle_int_t *rectangle);
+
+cairo_public cairo_bool_t
+cairo_region_contains_point (const cairo_region_t *region, int x, int y);
+
+cairo_public void
+cairo_region_translate (cairo_region_t *region, int dx, int dy);
+
+cairo_public cairo_status_t
+cairo_region_subtract (cairo_region_t *dst, const cairo_region_t *other);
+
+cairo_public cairo_status_t
+cairo_region_subtract_rectangle (cairo_region_t *dst,
+ const cairo_rectangle_int_t *rectangle);
+
+cairo_public cairo_status_t
+cairo_region_intersect (cairo_region_t *dst, const cairo_region_t *other);
+
+cairo_public cairo_status_t
+cairo_region_intersect_rectangle (cairo_region_t *dst,
+ const cairo_rectangle_int_t *rectangle);
+
+cairo_public cairo_status_t
+cairo_region_union (cairo_region_t *dst, const cairo_region_t *other);
+
+cairo_public cairo_status_t
+cairo_region_union_rectangle (cairo_region_t *dst,
+ const cairo_rectangle_int_t *rectangle);
+
+cairo_public cairo_status_t
+cairo_region_xor (cairo_region_t *dst, const cairo_region_t *other);
+
+cairo_public cairo_status_t
+cairo_region_xor_rectangle (cairo_region_t *dst,
+ const cairo_rectangle_int_t *rectangle);
+
+/* Functions to be used while debugging (not intended for use in production code) */
+cairo_public void
+cairo_debug_reset_static_data (void);
+
+
+CAIRO_END_DECLS
+
+#endif /* CAIRO_H */