cairoint.h

按照官方的说法：Cairo is a vector graphics library with cross-device output support. 翻译过来

cairo_private cairo_int_status_t
_cairo_surface_copy_page (cairo_surface_t *surface);

cairo_private cairo_int_status_t
_cairo_surface_show_page (cairo_surface_t *surface);

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

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

cairo_private cairo_status_t
_cairo_surface_acquire_dest_image (cairo_surface_t         *surface,
				   cairo_rectangle_int16_t *interest_rect,
				   cairo_image_surface_t  **image_out,
				   cairo_rectangle_int16_t *image_rect,
				   void                   **image_extra);

cairo_private void
_cairo_surface_release_dest_image (cairo_surface_t        *surface,
				   cairo_rectangle_int16_t      *interest_rect,
				   cairo_image_surface_t  *image,
				   cairo_rectangle_int16_t      *image_rect,
				   void                   *image_extra);

cairo_private cairo_status_t
_cairo_surface_clone_similar (cairo_surface_t  *surface,
			      cairo_surface_t  *src,
			      cairo_surface_t **clone_out);

cairo_private cairo_surface_t *
_cairo_surface_snapshot (cairo_surface_t *surface);

cairo_private unsigned int
_cairo_surface_get_current_clip_serial (cairo_surface_t *surface);

cairo_private unsigned int
_cairo_surface_allocate_clip_serial (cairo_surface_t *surface);

cairo_private cairo_status_t
_cairo_surface_reset_clip (cairo_surface_t *surface);

cairo_private cairo_status_t
_cairo_surface_set_clip_region (cairo_surface_t	    *surface,
				pixman_region16_t   *region,
				unsigned int	    serial);

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

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

cairo_private cairo_status_t
_cairo_surface_get_extents (cairo_surface_t         *surface,
			    cairo_rectangle_int16_t *rectangle);

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

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

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

cairo_private cairo_bool_t
_cairo_surface_is_opaque (const cairo_surface_t *surface);

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

cairo_private cairo_bool_t
_cairo_surface_has_device_transform (cairo_surface_t *surface);

/* cairo_image_surface.c */

#define CAIRO_FORMAT_VALID(format) ((format) >= CAIRO_FORMAT_ARGB32 && \
				    (format) <= CAIRO_FORMAT_A1)

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

cairo_private cairo_format_t
_cairo_format_from_content (cairo_content_t content);

cairo_private cairo_content_t
_cairo_content_from_format (cairo_format_t format);

cairo_private cairo_surface_t *
_cairo_image_surface_create_for_pixman_image (pixman_image_t *pixman_image,
					      cairo_format_t  format);

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

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

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

cairo_private void
_cairo_image_surface_assume_ownership_of_data (cairo_image_surface_t *surface);

/* XXX: It's a nasty kludge that this appears here. Backend functions
 * like this should really be static. But we're doing this to work
 * around some general defects in the backend clipping interfaces,
 * (see some notes in test-paginated-surface.c).
 *
 * I want to fix the real defects, but it's "hard" as they touch many
 * backends, so doing that will require synchronizing several backend
 * maintainers.
 */
cairo_private cairo_int_status_t
_cairo_image_surface_set_clip_region (void *abstract_surface,
				      pixman_region16_t *region);

cairo_private cairo_bool_t
_cairo_surface_is_image (const cairo_surface_t *surface);

cairo_private cairo_bool_t
_cairo_surface_is_meta (const cairo_surface_t *surface);

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

cairo_private cairo_status_t
_cairo_pen_init_empty (cairo_pen_t *pen);

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

cairo_private void
_cairo_pen_fini (cairo_pen_t *pen);

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

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

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

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

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

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

cairo_private void
_cairo_polygon_fini (cairo_polygon_t *polygon);

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

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

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

cairo_private cairo_status_t
_cairo_polygon_close (cairo_polygon_t *polygon);

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

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

cairo_private void
_cairo_spline_fini (cairo_spline_t *spline);

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

cairo_private void
_cairo_matrix_transform_bounding_box (const cairo_matrix_t *matrix,
				      double *x, double *y,
				      double *width, double *height);

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

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

cairo_private cairo_bool_t
_cairo_matrix_is_identity (const cairo_matrix_t *matrix);

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

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

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

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

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

cairo_private void
_cairo_traps_fini (cairo_traps_t *traps);

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

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

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

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

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

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

cairo_private cairo_status_t
_cairo_traps_extract_region (cairo_traps_t      *tr,
			     pixman_region16_t **region);

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

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

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

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

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

/* cairo_pattern.c */

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

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

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

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

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

cairo_private void
_cairo_pattern_fini (cairo_pattern_t *pattern);

cairo_private cairo_pattern_t *
_cairo_pattern_create_solid (const cairo_color_t *color);

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

cairo_private cairo_bool_t
_cairo_pattern_is_opaque_solid (const cairo_pattern_t *pattern);

cairo_bool_t
_cairo_pattern_is_opaque (const cairo_pattern_t *abstract_pattern);

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

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

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

cairo_private cairo_status_t
_cairo_pattern_get_extents (cairo_pattern_t	    *pattern,
			    cairo_rectangle_int16_t *extents);

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

cairo_private cairo_antialias_t
_cairo_gstate_get_antialias (cairo_gstate_t *gstate);

/* cairo-region.c */

cairo_private pixman_region16_t *
_cairo_region_create_from_rectangle (cairo_rectangle_int16_t *rect);

cairo_private void
_cairo_region_extents_rectangle (pixman_region16_t       *region,
				 cairo_rectangle_int16_t *rect)