/* cairo - a vector graphics library with display and print output
*
* 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 Red Hat, Inc.
*
* Contributor(s):
* Carl D. Worth <cworth@redhat.com>
*/
#ifndef CAIRO_PATTERN_PRIVATE_H
#define CAIRO_PATTERN_PRIVATE_H
#include "cairo-error-private.h"
#include "cairo-types-private.h"
#include "cairo-list-private.h"
#include "cairo-surface-private.h"
#include <stdio.h> /* FILE* */
CAIRO_BEGIN_DECLS
typedef struct _cairo_pattern_observer cairo_pattern_observer_t;
enum {
CAIRO_PATTERN_NOTIFY_MATRIX = 0x1,
CAIRO_PATTERN_NOTIFY_FILTER = 0x2,
CAIRO_PATTERN_NOTIFY_EXTEND = 0x4,
CAIRO_PATTERN_NOTIFY_OPACITY = 0x9,
};
struct _cairo_pattern_observer {
void (*notify) (cairo_pattern_observer_t *,
cairo_pattern_t *pattern,
unsigned int flags);
cairo_list_t link;
};
struct _cairo_pattern {
cairo_reference_count_t ref_count;
cairo_status_t status;
cairo_user_data_array_t user_data;
cairo_list_t observers;
cairo_pattern_type_t type;
cairo_filter_t filter;
cairo_extend_t extend;
cairo_bool_t has_component_alpha;
cairo_matrix_t matrix;
double opacity;
};
struct _cairo_solid_pattern {
cairo_pattern_t base;
cairo_color_t color;
};
typedef struct _cairo_surface_pattern {
cairo_pattern_t base;
cairo_surface_t *surface;
} cairo_surface_pattern_t;
typedef struct _cairo_gradient_stop {
double offset;
cairo_color_stop_t color;
} cairo_gradient_stop_t;
typedef struct _cairo_gradient_pattern {
cairo_pattern_t base;
unsigned int n_stops;
unsigned int stops_size;
cairo_gradient_stop_t *stops;
cairo_gradient_stop_t stops_embedded[2];
} cairo_gradient_pattern_t;
typedef struct _cairo_linear_pattern {
cairo_gradient_pattern_t base;
cairo_point_double_t pd1;
cairo_point_double_t pd2;
} cairo_linear_pattern_t;
typedef struct _cairo_radial_pattern {
cairo_gradient_pattern_t base;
cairo_circle_double_t cd1;
cairo_circle_double_t cd2;
} cairo_radial_pattern_t;
typedef union {
cairo_gradient_pattern_t base;
cairo_linear_pattern_t linear;
cairo_radial_pattern_t radial;
} cairo_gradient_pattern_union_t;
/*
* A mesh patch is a tensor-product patch (bicubic Bezier surface
* patch). It has 16 control points. Each set of 4 points along the
* sides of the 4x4 grid of control points is a Bezier curve that
* defines one side of the patch. A color is assigned to each
* corner. The inner 4 points provide additional control over the
* shape and the color mapping.
*
* Cairo uses the same convention as the PDF Reference for numbering
* the points and side of the patch.
*
*
* Side 1
*
* p[0][3] p[1][3] p[2][3] p[3][3]
* Side 0 p[0][2] p[1][2] p[2][2] p[3][2] Side 2
* p[0][1] p[1][1] p[2][1] p[3][1]
* p[0][0] p[1][0] p[2][0] p[3][0]
*
* Side 3
*
*
* Point Color
* -------------------------
* points[0][0] colors[0]
* points[0][3] colors[1]
* points[3][3] colors[2]
* points[3][0] colors[3]
*/
typedef struct _cairo_mesh_patch {
cairo_point_double_t points[4][4];
cairo_color_t colors[4];
} cairo_mesh_patch_t;
typedef struct _cairo_mesh_pattern {
cairo_pattern_t base;
cairo_array_t patches;
cairo_mesh_patch_t *current_patch;
int current_side;
cairo_bool_t has_control_point[4];
cairo_bool_t has_color[4];
} cairo_mesh_pattern_t;
typedef struct _cairo_raster_source_pattern {
cairo_pattern_t base;
cairo_content_t content;
cairo_rectangle_int_t extents;
cairo_raster_source_acquire_func_t acquire;
cairo_raster_source_release_func_t release;
cairo_raster_source_snapshot_func_t snapshot;
cairo_raster_source_copy_func_t copy;
cairo_raster_source_finish_func_t finish;
/* an explicit pre-allocated member in preference to the general user-data */
void *user_data;
} cairo_raster_source_pattern_t;
typedef union {
cairo_pattern_t base;
cairo_solid_pattern_t solid;
cairo_surface_pattern_t surface;
cairo_gradient_pattern_union_t gradient;
cairo_mesh_pattern_t mesh;
cairo_raster_source_pattern_t raster_source;
} cairo_pattern_union_t;
/* cairo-pattern.c */
cairo_private cairo_pattern_t *
_cairo_pattern_create_in_error (cairo_status_t status);
cairo_private cairo_status_t
_cairo_pattern_create_copy (cairo_pattern_t **pattern,
const cairo_pattern_t *other);
cairo_private void
_cairo_pattern_init (cairo_pattern_t *pattern,
cairo_pattern_type_t type);
cairo_private cairo_status_t
_cairo_pattern_init_copy (cairo_pattern_t *pattern,
const cairo_pattern_t *other);
cairo_private void
_cairo_pattern_init_static_copy (cairo_pattern_t *pattern,
const cairo_pattern_t *other);
cairo_private cairo_status_t
_cairo_pattern_init_snapshot (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_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 void
_cairo_pattern_pretransform (cairo_pattern_t *pattern,
const cairo_matrix_t *ctm);
cairo_private cairo_bool_t
_cairo_pattern_is_opaque_solid (const cairo_pattern_t *pattern);
cairo_private cairo_bool_t
_cairo_pattern_is_opaque (const cairo_pattern_t *pattern,
const cairo_rectangle_int_t *extents);
cairo_private cairo_bool_t
_cairo_pattern_is_clear (const cairo_pattern_t *pattern);
cairo_private cairo_bool_t
_cairo_gradient_pattern_is_solid (const cairo_gradient_pattern_t *gradient,
const cairo_rectangle_int_t *extents,
cairo_color_t *color);
cairo_private cairo_bool_t
_cairo_pattern_is_constant_alpha (const cairo_pattern_t *abstract_pattern,
const cairo_rectangle_int_t *extents,
double *alpha);
cairo_private void
_cairo_gradient_pattern_fit_to_range (const cairo_gradient_pattern_t *gradient,
double max_value,
cairo_matrix_t *out_matrix,
cairo_circle_double_t out_circle[2]);
cairo_private cairo_bool_t
_cairo_radial_pattern_focus_is_inside (const cairo_radial_pattern_t *radial);
cairo_private void
_cairo_gradient_pattern_box_to_parameter (const cairo_gradient_pattern_t *gradient,
double x0, double y0,
double x1, double y1,
double tolerance,
double out_range[2]);
cairo_private void
_cairo_gradient_pattern_interpolate (const cairo_gradient_pattern_t *gradient,
double t,
cairo_circle_double_t *out_circle);
cairo_private void
_cairo_pattern_alpha_range (const cairo_pattern_t *pattern,
double *out_min,
double *out_max);
cairo_private cairo_bool_t
_cairo_mesh_pattern_coord_box (const cairo_mesh_pattern_t *mesh,
double *out_xmin,
double *out_ymin,
double *out_xmax,
double *out_ymax);
cairo_private void
_cairo_pattern_sampled_area (const cairo_pattern_t *pattern,
const cairo_rectangle_int_t *extents,
cairo_rectangle_int_t *sample);
cairo_private void
_cairo_pattern_get_extents (const cairo_pattern_t *pattern,
cairo_rectangle_int_t *extents,
cairo_bool_t is_vector);
cairo_private cairo_int_status_t
_cairo_pattern_get_ink_extents (const cairo_pattern_t *pattern,
cairo_rectangle_int_t *extents);
cairo_private unsigned long
_cairo_pattern_hash (const cairo_pattern_t *pattern);
cairo_private unsigned long
_cairo_linear_pattern_hash (unsigned long hash,
const cairo_linear_pattern_t *linear);
cairo_private unsigned long
_cairo_radial_pattern_hash (unsigned long hash,
const cairo_radial_pattern_t *radial);
cairo_private cairo_bool_t
_cairo_linear_pattern_equal (const cairo_linear_pattern_t *a,
const cairo_linear_pattern_t *b);
cairo_private unsigned long
_cairo_pattern_size (const cairo_pattern_t *pattern);
cairo_private cairo_bool_t
_cairo_radial_pattern_equal (const cairo_radial_pattern_t *a,
const cairo_radial_pattern_t *b);
cairo_private cairo_bool_t
_cairo_pattern_equal (const cairo_pattern_t *a,
const cairo_pattern_t *b);
cairo_private cairo_filter_t
_cairo_pattern_analyze_filter (const cairo_pattern_t *pattern);
/* cairo-mesh-pattern-rasterizer.c */
cairo_private void
_cairo_mesh_pattern_rasterize (const cairo_mesh_pattern_t *mesh,
void *data,
int width,
int height,
int stride,
double x_offset,
double y_offset);
cairo_private cairo_surface_t *
_cairo_raster_source_pattern_acquire (const cairo_pattern_t *abstract_pattern,
cairo_surface_t *target,
const cairo_rectangle_int_t *extents);
cairo_private void
_cairo_raster_source_pattern_release (const cairo_pattern_t *abstract_pattern,
cairo_surface_t *surface);
cairo_private cairo_status_t
_cairo_raster_source_pattern_snapshot (cairo_pattern_t *abstract_pattern);
cairo_private cairo_status_t
_cairo_raster_source_pattern_init_copy (cairo_pattern_t *pattern,
const cairo_pattern_t *other);
cairo_private void
_cairo_raster_source_pattern_finish (cairo_pattern_t *abstract_pattern);
cairo_private void
_cairo_debug_print_pattern (FILE *file, const cairo_pattern_t *pattern);
CAIRO_END_DECLS
#endif /* CAIRO_PATTERN_PRIVATE */