http://www.ousob.com --- Legacy Redefined OuSob - File: /wwwroot/clipx/usr/include/cairo/cairo.h

/* cairo - a vector graphics library with display and print output * * Copyright © 2002 University of Southern California * Copyright © 2005 Red Hat, Inc. * * This library is free software; you can redistribute it and/or * modify it either under the terms of the GNU Lesser General Public * License version 2.1 as published by the Free Software Foundation * (the "LGPL") or, at your option, under the terms of the Mozilla * Public License Version 1.1 (the "MPL"). If you do not alter this * notice, a recipient may use your version of this file under either * the MPL or the LGPL. * * You should have received a copy of the LGPL along with this library * in the file COPYING-LGPL-2.1; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * You should have received a copy of the MPL along with this library * in the file COPYING-MPL-1.1 * * The contents of this file are subject to the Mozilla Public License * Version 1.1 (the "License"); you may not use this file except in * compliance with the License. You may obtain a copy of the License at * http://www.mozilla.org/MPL/ * * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY * OF ANY KIND, either express or implied. See the LGPL or the MPL for * the specific language governing rights and limitations. * * The Original Code is the cairo graphics library. * * The Initial Developer of the Original Code is University of Southern * California. * * Contributor(s): * Carl D. Worth <cworth@cworth.org> */ #ifndef CAIRO_H #define CAIRO_H #include <cairo-features.h> 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) int cairo_version (void); 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> */ 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. **/ 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. There are different subtypes of cairo_surface_t for * different drawing backends; for example, cairo_image_surface_create() * creates a bitmap image in memory. * * Memory management of #cairo_surface_t is done with * cairo_surface_reference() and cairo_surface_destroy(). */ typedef struct _cairo_surface cairo_surface_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> **/ typedef struct _cairo_matrix { double xx; double yx; double xy; double yy; double x0; double y0; } cairo_matrix_t; 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. */ 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. */ typedef struct _cairo_user_data_key { int unused; } cairo_user_data_key_t; /** * cairo_status_t * @CAIRO_STATUS_SUCCESS: no error has occurred * @CAIRO_STATUS_NO_MEMORY: out of memory * @CAIRO_STATUS_INVALID_RESTORE: cairo_restore without matching cairo_save * @CAIRO_STATUS_INVALID_POP_GROUP: no saved group to pop * @CAIRO_STATUS_NO_CURRENT_POINT: no current point defined * @CAIRO_STATUS_INVALID_MATRIX: invalid matrix (not invertible) * @CAIRO_STATUS_INVALID_STATUS: invalid value for an input cairo_status_t * @CAIRO_STATUS_NULL_POINTER: NULL pointer * @CAIRO_STATUS_INVALID_STRING: input string not valid UTF-8 * @CAIRO_STATUS_INVALID_PATH_DATA: input path data not valid * @CAIRO_STATUS_READ_ERROR: error while reading from input stream * @CAIRO_STATUS_WRITE_ERROR: error while writing to output stream * @CAIRO_STATUS_SURFACE_FINISHED: target surface has been finished * @CAIRO_STATUS_SURFACE_TYPE_MISMATCH: the surface type is not appropriate for the operation * @CAIRO_STATUS_PATTERN_TYPE_MISMATCH: the pattern type is not appropriate for the operation * @CAIRO_STATUS_INVALID_CONTENT: invalid value for an input cairo_content_t * @CAIRO_STATUS_INVALID_FORMAT: invalid value for an input cairo_format_t * @CAIRO_STATUS_INVALID_VISUAL: invalid value for an input Visual* * @CAIRO_STATUS_FILE_NOT_FOUND: file not found * @CAIRO_STATUS_INVALID_DASH: invalid value for a dash setting * * #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(). **/ 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_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 */ 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 intput 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 */ typedef cairo_status_t (*cairo_read_func_t) (void *closure, unsigned char *data, unsigned int length); /* Functions for manipulating state objects */ cairo_t * cairo_create (cairo_surface_t *target); cairo_t * cairo_reference (cairo_t *cr); void cairo_destroy (cairo_t *cr); void cairo_save (cairo_t *cr); void cairo_restore (cairo_t *cr); /* XXX: I want to rethink this API void cairo_push_group (cairo_t *cr); void cairo_pop_group (cairo_t *cr); */ /* Modify state */ 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_t; void cairo_set_operator (cairo_t *cr, cairo_operator_t op); void cairo_set_source (cairo_t *cr, cairo_pattern_t *source); void cairo_set_source_rgb (cairo_t *cr, double red, double green, double blue); void cairo_set_source_rgba (cairo_t *cr, double red, double green, double blue, double alpha); void cairo_set_source_surface (cairo_t *cr, cairo_surface_t *surface, double x, double y); 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 * @CAIRO_ANTIALIAS_NONE: Use a bilevel alpha mask * @CAIRO_ANTIALIAS_GRAY: Perform single-color antialiasing (using * shades of gray for black text on a white background, for example). * @CAIRO_ANTIALIAS_SUBPIXEL: Perform antialiasing by taking * advantage of the order of subpixel elements on devices * such as LCD panels * * Specifies the type of antialiasing to do when rendering text or shapes. **/ typedef enum _cairo_antialias { CAIRO_ANTIALIAS_DEFAULT, CAIRO_ANTIALIAS_NONE, CAIRO_ANTIALIAS_GRAY, CAIRO_ANTIALIAS_SUBPIXEL } cairo_antialias_t; 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. * @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. * * #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.) **/ typedef enum _cairo_fill_rule { CAIRO_FILL_RULE_WINDING, CAIRO_FILL_RULE_EVEN_ODD } cairo_fill_rule_t; void cairo_set_fill_rule (cairo_t *cr, cairo_fill_rule_t fill_rule); 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 * @CAIRO_LINE_CAP_ROUND: use a round ending, the center of the circle is the end point * @CAIRO_LINE_CAP_SQUARE: use squared ending, the center of the square is the end point * * enumeration for style of line-endings **/ typedef enum _cairo_line_cap { CAIRO_LINE_CAP_BUTT, CAIRO_LINE_CAP_ROUND, CAIRO_LINE_CAP_SQUARE } cairo_line_cap_t; void cairo_set_line_cap (cairo_t *cr, cairo_line_cap_t line_cap); typedef enum _cairo_line_join { CAIRO_LINE_JOIN_MITER, CAIRO_LINE_JOIN_ROUND, CAIRO_LINE_JOIN_BEVEL } cairo_line_join_t; void cairo_set_line_join (cairo_t *cr, cairo_line_join_t line_join); void cairo_set_dash (cairo_t *cr, double *dashes, int num_dashes, double offset); void cairo_set_miter_limit (cairo_t *cr, double limit); void cairo_translate (cairo_t *cr, double tx, double ty); void cairo_scale (cairo_t *cr, double sx, double sy); void cairo_rotate (cairo_t *cr, double angle); void cairo_transform (cairo_t *cr, const cairo_matrix_t *matrix); void cairo_set_matrix (cairo_t *cr, const cairo_matrix_t *matrix); void cairo_identity_matrix (cairo_t *cr); void cairo_user_to_device (cairo_t *cr, double *x, double *y); void cairo_user_to_device_distance (cairo_t *cr, double *dx, double *dy); void cairo_device_to_user (cairo_t *cr, double *x, double *y); void cairo_device_to_user_distance (cairo_t *cr, double *dx, double *dy); /* Path creation functions */ void cairo_new_path (cairo_t *cr); void cairo_move_to (cairo_t *cr, double x, double y); void cairo_line_to (cairo_t *cr, double x, double y); void cairo_curve_to (cairo_t *cr, double x1, double y1, double x2, double y2, double x3, double y3); void cairo_arc (cairo_t *cr, double xc, double yc, double radius, double angle1, double angle2); void cairo_arc_negative (cairo_t *cr, double xc, double yc, double radius, double angle1, double angle2); /* XXX: NYI void cairo_arc_to (cairo_t *cr, double x1, double y1, double x2, double y2, double radius); */ void cairo_rel_move_to (cairo_t *cr, double dx, double dy); void cairo_rel_line_to (cairo_t *cr, double dx, double dy); void cairo_rel_curve_to (cairo_t *cr, double dx1, double dy1, double dx2, double dy2, double dx3, double dy3); void cairo_rectangle (cairo_t *cr, double x, double y, double width, double height); /* XXX: NYI void cairo_stroke_to_path (cairo_t *cr); */ void cairo_close_path (cairo_t *cr); /* Painting functions */ void cairo_paint (cairo_t *cr); void cairo_paint_with_alpha (cairo_t *cr, double alpha); void cairo_mask (cairo_t *cr, cairo_pattern_t *pattern); void cairo_mask_surface (cairo_t *cr, cairo_surface_t *surface, double surface_x, double surface_y); void cairo_stroke (cairo_t *cr); void cairo_stroke_preserve (cairo_t *cr); void cairo_fill (cairo_t *cr); void cairo_fill_preserve (cairo_t *cr); void cairo_copy_page (cairo_t *cr); void cairo_show_page (cairo_t *cr); /* Insideness testing */ cairo_bool_t cairo_in_stroke (cairo_t *cr, double x, double y); cairo_bool_t cairo_in_fill (cairo_t *cr, double x, double y); /* Rectangular extents */ void cairo_stroke_extents (cairo_t *cr, double *x1, double *y1, double *x2, double *y2); void cairo_fill_extents (cairo_t *cr, double *x1, double *y1, double *x2, double *y2); /* Clipping */ void cairo_reset_clip (cairo_t *cr); void cairo_clip (cairo_t *cr); void cairo_clip_preserve (cairo_t *cr); /* 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. */ 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(). */ 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 **/ typedef struct { unsigned long index; double x; double y; } cairo_glyph_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. */ 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 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 the origin is advanced for any glyph in the font. * @max_y_advance: the maximum distance in the Y direction that * the 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_text_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. */ typedef struct { double ascent; double descent; double height; double max_x_advance; double max_y_advance; } cairo_font_extents_t; typedef enum _cairo_font_slant { CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_SLANT_ITALIC, CAIRO_FONT_SLANT_OBLIQUE } cairo_font_slant_t; 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 * @CAIRO_SUBPIXEL_ORDER_RGB: Subpixel elements are arranged horizontally * with red at the left * @CAIRO_SUBPIXEL_ORDER_BGR: Subpixel elements are arranged horizontally * with blue at the left * @CAIRO_SUBPIXEL_ORDER_VRGB: Subpixel elements are arranged vertically * with red at the top * @CAIRO_SUBPIXEL_ORDER_VBGR: Subpixel elements are arranged vertically * with blue at the top * * 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. **/ 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 * for font backend and target device * @CAIRO_HINT_STYLE_NONE: Do not hint outlines * @CAIRO_HINT_STYLE_SLIGHT: Hint outlines slightly to improve * contrast while retaining good fidelity to the original * shapes. * @CAIRO_HINT_STYLE_MEDIUM: Hint outlines with medium strength * giving a compromise between fidelity to the original shapes * and contrast * @CAIRO_HINT_STYLE_FULL: Hint outlines to maximize contrast * * 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. */ 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 * @CAIRO_HINT_METRICS_OFF: Do not hint font metrics * @CAIRO_HINT_METRICS_ON: Hint font metrics * * 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. */ typedef enum _cairo_hint_metrics { CAIRO_HINT_METRICS_DEFAULT, CAIRO_HINT_METRICS_OFF, CAIRO_HINT_METRICS_ON } cairo_hint_metrics_t; typedef struct _cairo_font_options cairo_font_options_t; cairo_font_options_t * cairo_font_options_create (void); cairo_font_options_t * cairo_font_options_copy (const cairo_font_options_t *original); void cairo_font_options_destroy (cairo_font_options_t *options); cairo_status_t cairo_font_options_status (cairo_font_options_t *options); void cairo_font_options_merge (cairo_font_options_t *options, const cairo_font_options_t *other); cairo_bool_t cairo_font_options_equal (const cairo_font_options_t *options, const cairo_font_options_t *other); unsigned long cairo_font_options_hash (const cairo_font_options_t *options); void cairo_font_options_set_antialias (cairo_font_options_t *options, cairo_antialias_t antialias); cairo_antialias_t cairo_font_options_get_antialias (const cairo_font_options_t *options); void cairo_font_options_set_subpixel_order (cairo_font_options_t *options, cairo_subpixel_order_t subpixel_order); cairo_subpixel_order_t cairo_font_options_get_subpixel_order (const cairo_font_options_t *options); void cairo_font_options_set_hint_style (cairo_font_options_t *options, cairo_hint_style_t hint_style); cairo_hint_style_t cairo_font_options_get_hint_style (const cairo_font_options_t *options); void cairo_font_options_set_hint_metrics (cairo_font_options_t *options, cairo_hint_metrics_t hint_metrics); 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. */ void cairo_select_font_face (cairo_t *cr, const char *family, cairo_font_slant_t slant, cairo_font_weight_t weight); void cairo_set_font_size (cairo_t *cr, double size); void cairo_set_font_matrix (cairo_t *cr, const cairo_matrix_t *matrix); void cairo_get_font_matrix (cairo_t *cr, cairo_matrix_t *matrix); void cairo_set_font_options (cairo_t *cr, const cairo_font_options_t *options); void cairo_get_font_options (cairo_t *cr, cairo_font_options_t *options); void cairo_show_text (cairo_t *cr, const char *utf8); void cairo_show_glyphs (cairo_t *cr, cairo_glyph_t *glyphs, int num_glyphs); cairo_font_face_t * cairo_get_font_face (cairo_t *cr); void cairo_font_extents (cairo_t *cr, cairo_font_extents_t *extents); void cairo_set_font_face (cairo_t *cr, cairo_font_face_t *font_face); void cairo_text_extents (cairo_t *cr, const char *utf8, cairo_text_extents_t *extents); void cairo_glyph_extents (cairo_t *cr, cairo_glyph_t *glyphs, int num_glyphs, cairo_text_extents_t *extents); void cairo_text_path (cairo_t *cr, const char *utf8); void cairo_glyph_path (cairo_t *cr, cairo_glyph_t *glyphs, int num_glyphs); /* Generic identifier for a font style */ cairo_font_face_t * cairo_font_face_reference (cairo_font_face_t *font_face); void cairo_font_face_destroy (cairo_font_face_t *font_face); cairo_status_t cairo_font_face_status (cairo_font_face_t *font_face); void * cairo_font_face_get_user_data (cairo_font_face_t *font_face, const cairo_user_data_key_t *key); 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_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_scaled_font_t * cairo_scaled_font_reference (cairo_scaled_font_t *scaled_font); void cairo_scaled_font_destroy (cairo_scaled_font_t *scaled_font); cairo_status_t cairo_scaled_font_status (cairo_scaled_font_t *scaled_font); void cairo_scaled_font_extents (cairo_scaled_font_t *scaled_font, cairo_font_extents_t *extents); void cairo_scaled_font_glyph_extents (cairo_scaled_font_t *scaled_font, cairo_glyph_t *glyphs, int num_glyphs, cairo_text_extents_t *extents); /* Query functions */ cairo_operator_t cairo_get_operator (cairo_t *cr); cairo_pattern_t * cairo_get_source (cairo_t *cr); double cairo_get_tolerance (cairo_t *cr); cairo_antialias_t cairo_get_antialias (cairo_t *cr); void cairo_get_current_point (cairo_t *cr, double *x, double *y); cairo_fill_rule_t cairo_get_fill_rule (cairo_t *cr); double cairo_get_line_width (cairo_t *cr); cairo_line_cap_t cairo_get_line_cap (cairo_t *cr); cairo_line_join_t cairo_get_line_join (cairo_t *cr); double cairo_get_miter_limit (cairo_t *cr); /* XXX: How to do cairo_get_dash??? Do we want to switch to a cairo_dash object? */ void cairo_get_matrix (cairo_t *cr, cairo_matrix_t *matrix); cairo_surface_t * cairo_get_target (cairo_t *cr); 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 must be 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> **/ 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_data() and * cairo_copy_path_data_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. **/ typedef struct cairo_path { cairo_status_t status; cairo_path_data_t *data; int num_data; } cairo_path_t; cairo_path_t * cairo_copy_path (cairo_t *cr); cairo_path_t * cairo_copy_path_flat (cairo_t *cr); void cairo_append_path (cairo_t *cr, cairo_path_t *path); void cairo_path_destroy (cairo_path_t *path); /* Error status queries */ cairo_status_t cairo_status (cairo_t *cr); const char * cairo_status_to_string (cairo_status_t status); /* Surface manipulation */ /** * cairo_content_t * @CAIRO_CONTENT_COLOR: The surface will hold color content only. * @CAIRO_CONTENT_ALPHA: The surface will hold alpha content only. * @CAIRO_CONTENT_COLOR_ALPHA: The surface will hold color and alpha content. * * @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. */ typedef enum _cairo_content { CAIRO_CONTENT_COLOR = 0x1000, CAIRO_CONTENT_ALPHA = 0x2000, CAIRO_CONTENT_COLOR_ALPHA = 0x3000 } cairo_content_t; cairo_surface_t * cairo_surface_create_similar (cairo_surface_t *other, cairo_content_t content, int width, int height); cairo_surface_t * cairo_surface_reference (cairo_surface_t *surface); void cairo_surface_destroy (cairo_surface_t *surface); cairo_status_t cairo_surface_status (cairo_surface_t *surface); void cairo_surface_finish (cairo_surface_t *surface); #if CAIRO_HAS_PNG_FUNCTIONS cairo_status_t cairo_surface_write_to_png (cairo_surface_t *surface, const char *filename); cairo_status_t cairo_surface_write_to_png_stream (cairo_surface_t *surface, cairo_write_func_t write_func, void *closure); #endif void * cairo_surface_get_user_data (cairo_surface_t *surface, const cairo_user_data_key_t *key); 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); void cairo_surface_get_font_options (cairo_surface_t *surface, cairo_font_options_t *options); void cairo_surface_flush (cairo_surface_t *surface); void cairo_surface_mark_dirty (cairo_surface_t *surface); void cairo_surface_mark_dirty_rectangle (cairo_surface_t *surface, int x, int y, int width, int height); void cairo_surface_set_device_offset (cairo_surface_t *surface, double x_offset, double y_offset); /* Image-surface functions */ /** * cairo_format_t * @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.) * @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. * @CAIRO_FORMAT_A8: each pixel is a 8-bit quantity holding * an alpha value. * @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. * * #cairo_format_t is used to identify the memory format of * image data. */ typedef enum _cairo_format { CAIRO_FORMAT_ARGB32, CAIRO_FORMAT_RGB24, CAIRO_FORMAT_A8, CAIRO_FORMAT_A1 } cairo_format_t; cairo_surface_t * cairo_image_surface_create (cairo_format_t format, int width, int height); cairo_surface_t * cairo_image_surface_create_for_data (unsigned char *data, cairo_format_t format, int width, int height, int stride); int cairo_image_surface_get_width (cairo_surface_t *surface); int cairo_image_surface_get_height (cairo_surface_t *surface); #if CAIRO_HAS_PNG_FUNCTIONS cairo_surface_t * cairo_image_surface_create_from_png (const char *filename); cairo_surface_t * cairo_image_surface_create_from_png_stream (cairo_read_func_t read_func, void *closure); #endif /* Pattern creation functions */ cairo_pattern_t * cairo_pattern_create_rgb (double red, double green, double blue); cairo_pattern_t * cairo_pattern_create_rgba (double red, double green, double blue, double alpha); cairo_pattern_t * cairo_pattern_create_for_surface (cairo_surface_t *surface); cairo_pattern_t * cairo_pattern_create_linear (double x0, double y0, double x1, double y1); cairo_pattern_t * cairo_pattern_create_radial (double cx0, double cy0, double radius0, double cx1, double cy1, double radius1); cairo_pattern_t * cairo_pattern_reference (cairo_pattern_t *pattern); void cairo_pattern_destroy (cairo_pattern_t *pattern); cairo_status_t cairo_pattern_status (cairo_pattern_t *pattern); void cairo_pattern_add_color_stop_rgb (cairo_pattern_t *pattern, double offset, double red, double green, double blue); void cairo_pattern_add_color_stop_rgba (cairo_pattern_t *pattern, double offset, double red, double green, double blue, double alpha); void cairo_pattern_set_matrix (cairo_pattern_t *pattern, const cairo_matrix_t *matrix); void cairo_pattern_get_matrix (cairo_pattern_t *pattern, cairo_matrix_t *matrix); typedef enum _cairo_extend { CAIRO_EXTEND_NONE, CAIRO_EXTEND_REPEAT, CAIRO_EXTEND_REFLECT } cairo_extend_t; void cairo_pattern_set_extend (cairo_pattern_t *pattern, cairo_extend_t extend); cairo_extend_t cairo_pattern_get_extend (cairo_pattern_t *pattern); 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; void cairo_pattern_set_filter (cairo_pattern_t *pattern, cairo_filter_t filter); cairo_filter_t cairo_pattern_get_filter (cairo_pattern_t *pattern); /* Matrix functions */ void cairo_matrix_init (cairo_matrix_t *matrix, double xx, double yx, double xy, double yy, double x0, double y0); void cairo_matrix_init_identity (cairo_matrix_t *matrix); void cairo_matrix_init_translate (cairo_matrix_t *matrix, double tx, double ty); void cairo_matrix_init_scale (cairo_matrix_t *matrix, double sx, double sy); void cairo_matrix_init_rotate (cairo_matrix_t *matrix, double radians); void cairo_matrix_translate (cairo_matrix_t *matrix, double tx, double ty); void cairo_matrix_scale (cairo_matrix_t *matrix, double sx, double sy); void cairo_matrix_rotate (cairo_matrix_t *matrix, double radians); cairo_status_t cairo_matrix_invert (cairo_matrix_t *matrix); void cairo_matrix_multiply (cairo_matrix_t *result, const cairo_matrix_t *a, const cairo_matrix_t *b); /* XXX: Need a new name here perhaps. */ void cairo_matrix_transform_distance (const cairo_matrix_t *matrix, double *dx, double *dy); /* XXX: Need a new name here perhaps. */ void cairo_matrix_transform_point (const cairo_matrix_t *matrix, double *x, double *y); #ifndef _CAIROINT_H_ /* Obsolete functions. These definitions exist to coerce the compiler * into providing a little bit of guidance with its error * messages. The idea is to help users port their old code without * having to dig through lots of documentation. * * The first set of REPLACED_BY functions is for functions whose names * have just been changed. So fixing these up is mechanical, (and * automated by means of the cairo/util/cairo-api-update script. * * The second set of DEPRECATED_BY functions is for functions where * the replacement is used in a different way, (ie. different * arguments, multiple functions instead of one, etc). Fixing these up * will require a bit more work on the user's part, (and hopefully we * can get cairo-api-update to find these and print some guiding * information). */ #define cairo_current_font_extents cairo_current_font_extents_REPLACED_BY_cairo_font_extents #define cairo_get_font_extents cairo_get_font_extents_REPLACED_BY_cairo_font_extents #define cairo_current_operator cairo_current_operator_REPLACED_BY_cairo_get_operator #define cairo_current_tolerance cairo_current_tolerance_REPLACED_BY_cairo_get_tolerance #define cairo_current_point cairo_current_point_REPLACED_BY_cairo_get_current_point #define cairo_current_fill_rule cairo_current_fill_rule_REPLACED_BY_cairo_get_fill_rule #define cairo_current_line_width cairo_current_line_width_REPLACED_BY_cairo_get_line_width #define cairo_current_line_cap cairo_current_line_cap_REPLACED_BY_cairo_get_line_cap #define cairo_current_line_join cairo_current_line_join_REPLACED_BY_cairo_get_line_join #define cairo_current_miter_limit cairo_current_miter_limit_REPLACED_BY_cairo_get_miter_limit #define cairo_current_matrix cairo_current_matrix_REPLACED_BY_cairo_get_matrix #define cairo_current_target_surface cairo_current_target_surface_REPLACED_BY_cairo_get_target #define cairo_get_status cairo_get_status_REPLACED_BY_cairo_status #define cairo_concat_matrix cairo_concat_matrix_REPLACED_BY_cairo_transform #define cairo_scale_font cairo_scale_font_REPLACED_BY_cairo_set_font_size #define cairo_select_font cairo_select_font_REPLACED_BY_cairo_select_font_face #define cairo_transform_font cairo_transform_font_REPLACED_BY_cairo_set_font_matrix #define cairo_transform_point cairo_transform_point_REPLACED_BY_cairo_user_to_device #define cairo_transform_distance cairo_transform_distance_REPLACED_BY_cairo_user_to_device_distance #define cairo_inverse_transform_point cairo_inverse_transform_point_REPLACED_BY_cairo_device_to_user #define cairo_inverse_transform_distance cairo_inverse_transform_distance_REPLACED_BY_cairo_device_to_user_distance #define cairo_init_clip cairo_init_clip_REPLACED_BY_cairo_reset_clip #define cairo_surface_create_for_image cairo_surface_create_for_image_REPLACED_BY_cairo_image_surface_create_for_data #define cairo_default_matrix cairo_default_matrix_REPLACED_BY_cairo_identity_matrix #define cairo_matrix_set_affine cairo_matrix_set_affine_REPLACED_BY_cairo_matrix_init #define cairo_matrix_set_identity cairo_matrix_set_identity_REPLACED_BY_cairo_matrix_init_identity #define cairo_pattern_add_color_stop cairo_pattern_add_color_stop_REPLACED_BY_cairo_pattern_add_color_stop_rgba #define cairo_set_rgb_color cairo_set_rgb_color_REPLACED_BY_cairo_set_source_rgb #define cairo_set_pattern cairo_set_pattern_REPLACED_BY_cairo_set_source #define cairo_xlib_surface_create_for_pixmap_with_visual cairo_xlib_surface_create_for_pixmap_with_visual_REPLACED_BY_cairo_xlib_surface_create #define cairo_xlib_surface_create_for_window_with_visual cairo_xlib_surface_create_for_window_with_visual_REPLACED_BY_cairo_xlib_surface_create #define cairo_xcb_surface_create_for_pixmap_with_visual cairo_xcb_surface_create_for_pixmap_with_visual_REPLACED_BY_cairo_xcb_surface_create #define cairo_xcb_surface_create_for_window_with_visual cairo_xcb_surface_create_for_window_with_visual_REPLACED_BY_cairo_xcb_surface_create #define cairo_current_path cairo_current_path_DEPRECATED_BY_cairo_copy_path #define cairo_current_path_flat cairo_current_path_flat_DEPRECATED_BY_cairo_copy_path_flat #define cairo_get_path cairo_get_path_DEPRECATED_BY_cairo_copy_path #define cairo_get_path_flat cairo_get_path_flat_DEPRECATED_BY_cairo_get_path_flat #define cairo_set_alpha cairo_set_alpha_DEPRECATED_BY_cairo_set_source_rgba_OR_cairo_paint_with_alpha #define cairo_show_surface cairo_show_surface_DEPRECATED_BY_cairo_set_source_surface_AND_cairo_paint #define cairo_copy cairo_copy_DEPRECATED_BY_cairo_create_AND_MANY_INDIVIDUAL_FUNCTIONS #define cairo_surface_set_repeat cairo_surface_set_repeat_DEPRECATED_BY_cairo_pattern_set_extend #define cairo_surface_set_matrix cairo_surface_set_matrix_DEPRECATED_BY_cairo_pattern_set_matrix #define cairo_surface_get_matrix cairo_surface_get_matrix_DEPRECATED_BY_cairo_pattern_get_matrix #define cairo_surface_set_filter cairo_surface_set_filter_DEPRECATED_BY_cairo_pattern_set_filter #define cairo_surface_get_filter cairo_surface_get_filter_DEPRECATED_BY_cairo_pattern_get_filter #define cairo_matrix_create cairo_matrix_create_DEPRECATED_BY_cairo_matrix_t #define cairo_matrix_destroy cairo_matrix_destroy_DEPRECATED_BY_cairo_matrix_t #define cairo_matrix_copy cairo_matrix_copy_DEPRECATED_BY_cairo_matrix_t #define cairo_matrix_get_affine cairo_matrix_get_affine_DEPRECATED_BY_cairo_matrix_t #define cairo_set_target_surface cairo_set_target_surface_DEPRECATED_BY_cairo_create #define cairo_set_target_glitz cairo_set_target_glitz_DEPRECATED_BY_cairo_glitz_surface_create #define cairo_set_target_image cairo_set_target_image_DEPRECATED_BY_cairo_image_surface_create_for_data #define cairo_set_target_pdf cairo_set_target_pdf_DEPRECATED_BY_cairo_pdf_surface_create #define cairo_set_target_png cairo_set_target_png_DEPRECATED_BY_cairo_surface_write_to_png #define cairo_set_target_ps cairo_set_target_ps_DEPRECATED_BY_cairo_ps_surface_create #define cairo_set_target_quartz cairo_set_target_quartz_DEPRECATED_BY_cairo_quartz_surface_create #define cairo_set_target_win32 cairo_set_target_win32_DEPRECATED_BY_cairo_win32_surface_create #define cairo_set_target_xcb cairo_set_target_xcb_DEPRECATED_BY_cairo_xcb_surface_create #define cairo_set_target_drawable cairo_set_target_drawable_DEPRECATED_BY_cairo_xlib_surface_create #define cairo_get_status_string cairo_get_status_string_DEPRECATED_BY_cairo_status_AND_cairo_status_to_string #define cairo_status_string cairo_status_string_DEPRECATED_BY_cairo_status_AND_cairo_status_to_string #endif CAIRO_END_DECLS #endif /* CAIRO_H */