forked from KolibriOS/kolibrios
363 lines
11 KiB
C
363 lines
11 KiB
C
/* cairo - a vector graphics library with display and print output
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*
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* Copyright © 2005 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it either under the terms of the GNU Lesser General Public
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* License version 2.1 as published by the Free Software Foundation
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* (the "LGPL") or, at your option, under the terms of the Mozilla
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* Public License Version 1.1 (the "MPL"). If you do not alter this
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* notice, a recipient may use your version of this file under either
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* the MPL or the LGPL.
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*
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* You should have received a copy of the LGPL along with this library
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* in the file COPYING-LGPL-2.1; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
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* You should have received a copy of the MPL along with this library
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* in the file COPYING-MPL-1.1
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*
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* The contents of this file are subject to the Mozilla Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
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* OF ANY KIND, either express or implied. See the LGPL or the MPL for
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* the specific language governing rights and limitations.
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*
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* The Original Code is the cairo graphics library.
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*
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* The Initial Developer of the Original Code is Red Hat, Inc.
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*
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* Contributor(s):
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* Carl D. Worth <cworth@redhat.com>
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*/
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#ifndef CAIRO_PATTERN_PRIVATE_H
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#define CAIRO_PATTERN_PRIVATE_H
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#include "cairo-error-private.h"
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#include "cairo-types-private.h"
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#include "cairo-list-private.h"
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#include "cairo-surface-private.h"
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#include <stdio.h> /* FILE* */
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CAIRO_BEGIN_DECLS
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typedef struct _cairo_pattern_observer cairo_pattern_observer_t;
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enum {
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CAIRO_PATTERN_NOTIFY_MATRIX = 0x1,
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CAIRO_PATTERN_NOTIFY_FILTER = 0x2,
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CAIRO_PATTERN_NOTIFY_EXTEND = 0x4,
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CAIRO_PATTERN_NOTIFY_OPACITY = 0x9,
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};
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struct _cairo_pattern_observer {
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void (*notify) (cairo_pattern_observer_t *,
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cairo_pattern_t *pattern,
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unsigned int flags);
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cairo_list_t link;
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};
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struct _cairo_pattern {
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cairo_reference_count_t ref_count;
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cairo_status_t status;
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cairo_user_data_array_t user_data;
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cairo_list_t observers;
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cairo_pattern_type_t type;
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cairo_filter_t filter;
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cairo_extend_t extend;
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cairo_bool_t has_component_alpha;
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cairo_matrix_t matrix;
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double opacity;
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};
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struct _cairo_solid_pattern {
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cairo_pattern_t base;
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cairo_color_t color;
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};
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typedef struct _cairo_surface_pattern {
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cairo_pattern_t base;
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cairo_surface_t *surface;
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} cairo_surface_pattern_t;
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typedef struct _cairo_gradient_stop {
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double offset;
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cairo_color_stop_t color;
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} cairo_gradient_stop_t;
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typedef struct _cairo_gradient_pattern {
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cairo_pattern_t base;
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unsigned int n_stops;
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unsigned int stops_size;
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cairo_gradient_stop_t *stops;
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cairo_gradient_stop_t stops_embedded[2];
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} cairo_gradient_pattern_t;
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typedef struct _cairo_linear_pattern {
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cairo_gradient_pattern_t base;
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cairo_point_double_t pd1;
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cairo_point_double_t pd2;
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} cairo_linear_pattern_t;
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typedef struct _cairo_radial_pattern {
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cairo_gradient_pattern_t base;
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cairo_circle_double_t cd1;
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cairo_circle_double_t cd2;
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} cairo_radial_pattern_t;
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typedef union {
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cairo_gradient_pattern_t base;
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cairo_linear_pattern_t linear;
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cairo_radial_pattern_t radial;
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} cairo_gradient_pattern_union_t;
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/*
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* A mesh patch is a tensor-product patch (bicubic Bezier surface
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* patch). It has 16 control points. Each set of 4 points along the
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* sides of the 4x4 grid of control points is a Bezier curve that
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* defines one side of the patch. A color is assigned to each
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* corner. The inner 4 points provide additional control over the
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* shape and the color mapping.
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*
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* Cairo uses the same convention as the PDF Reference for numbering
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* the points and side of the patch.
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*
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*
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* Side 1
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*
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* p[0][3] p[1][3] p[2][3] p[3][3]
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* Side 0 p[0][2] p[1][2] p[2][2] p[3][2] Side 2
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* p[0][1] p[1][1] p[2][1] p[3][1]
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* p[0][0] p[1][0] p[2][0] p[3][0]
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*
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* Side 3
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*
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*
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* Point Color
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* -------------------------
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* points[0][0] colors[0]
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* points[0][3] colors[1]
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* points[3][3] colors[2]
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* points[3][0] colors[3]
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*/
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typedef struct _cairo_mesh_patch {
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cairo_point_double_t points[4][4];
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cairo_color_t colors[4];
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} cairo_mesh_patch_t;
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typedef struct _cairo_mesh_pattern {
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cairo_pattern_t base;
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cairo_array_t patches;
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cairo_mesh_patch_t *current_patch;
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int current_side;
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cairo_bool_t has_control_point[4];
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cairo_bool_t has_color[4];
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} cairo_mesh_pattern_t;
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typedef struct _cairo_raster_source_pattern {
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cairo_pattern_t base;
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cairo_content_t content;
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cairo_rectangle_int_t extents;
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cairo_raster_source_acquire_func_t acquire;
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cairo_raster_source_release_func_t release;
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cairo_raster_source_snapshot_func_t snapshot;
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cairo_raster_source_copy_func_t copy;
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cairo_raster_source_finish_func_t finish;
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/* an explicit pre-allocated member in preference to the general user-data */
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void *user_data;
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} cairo_raster_source_pattern_t;
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typedef union {
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cairo_pattern_t base;
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cairo_solid_pattern_t solid;
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cairo_surface_pattern_t surface;
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cairo_gradient_pattern_union_t gradient;
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cairo_mesh_pattern_t mesh;
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cairo_raster_source_pattern_t raster_source;
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} cairo_pattern_union_t;
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/* cairo-pattern.c */
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cairo_private cairo_pattern_t *
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_cairo_pattern_create_in_error (cairo_status_t status);
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cairo_private cairo_status_t
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_cairo_pattern_create_copy (cairo_pattern_t **pattern,
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const cairo_pattern_t *other);
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cairo_private void
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_cairo_pattern_init (cairo_pattern_t *pattern,
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cairo_pattern_type_t type);
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cairo_private cairo_status_t
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_cairo_pattern_init_copy (cairo_pattern_t *pattern,
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const cairo_pattern_t *other);
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cairo_private void
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_cairo_pattern_init_static_copy (cairo_pattern_t *pattern,
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const cairo_pattern_t *other);
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cairo_private cairo_status_t
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_cairo_pattern_init_snapshot (cairo_pattern_t *pattern,
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const cairo_pattern_t *other);
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cairo_private void
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_cairo_pattern_init_solid (cairo_solid_pattern_t *pattern,
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const cairo_color_t *color);
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cairo_private void
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_cairo_pattern_init_for_surface (cairo_surface_pattern_t *pattern,
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cairo_surface_t *surface);
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cairo_private void
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_cairo_pattern_fini (cairo_pattern_t *pattern);
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cairo_private cairo_pattern_t *
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_cairo_pattern_create_solid (const cairo_color_t *color);
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cairo_private void
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_cairo_pattern_transform (cairo_pattern_t *pattern,
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const cairo_matrix_t *ctm_inverse);
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cairo_private cairo_bool_t
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_cairo_pattern_is_opaque_solid (const cairo_pattern_t *pattern);
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cairo_private cairo_bool_t
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_cairo_pattern_is_opaque (const cairo_pattern_t *pattern,
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const cairo_rectangle_int_t *extents);
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cairo_private cairo_bool_t
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_cairo_pattern_is_clear (const cairo_pattern_t *pattern);
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cairo_private cairo_bool_t
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_cairo_gradient_pattern_is_solid (const cairo_gradient_pattern_t *gradient,
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const cairo_rectangle_int_t *extents,
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cairo_color_t *color);
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cairo_private void
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_cairo_gradient_pattern_fit_to_range (const cairo_gradient_pattern_t *gradient,
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double max_value,
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cairo_matrix_t *out_matrix,
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cairo_circle_double_t out_circle[2]);
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cairo_private cairo_bool_t
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_cairo_radial_pattern_focus_is_inside (const cairo_radial_pattern_t *radial);
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cairo_private void
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_cairo_gradient_pattern_box_to_parameter (const cairo_gradient_pattern_t *gradient,
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double x0, double y0,
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double x1, double y1,
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double tolerance,
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double out_range[2]);
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cairo_private void
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_cairo_gradient_pattern_interpolate (const cairo_gradient_pattern_t *gradient,
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double t,
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cairo_circle_double_t *out_circle);
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cairo_private void
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_cairo_pattern_alpha_range (const cairo_pattern_t *pattern,
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double *out_min,
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double *out_max);
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cairo_private cairo_bool_t
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_cairo_mesh_pattern_coord_box (const cairo_mesh_pattern_t *mesh,
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double *out_xmin,
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double *out_ymin,
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double *out_xmax,
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double *out_ymax);
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cairo_private_no_warn cairo_filter_t
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_cairo_pattern_sampled_area (const cairo_pattern_t *pattern,
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const cairo_rectangle_int_t *extents,
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cairo_rectangle_int_t *sample);
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cairo_private void
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_cairo_pattern_get_extents (const cairo_pattern_t *pattern,
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cairo_rectangle_int_t *extents);
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cairo_private cairo_int_status_t
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_cairo_pattern_get_ink_extents (const cairo_pattern_t *pattern,
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cairo_rectangle_int_t *extents);
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cairo_private unsigned long
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_cairo_pattern_hash (const cairo_pattern_t *pattern);
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cairo_private unsigned long
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_cairo_linear_pattern_hash (unsigned long hash,
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const cairo_linear_pattern_t *linear);
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cairo_private unsigned long
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_cairo_radial_pattern_hash (unsigned long hash,
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const cairo_radial_pattern_t *radial);
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cairo_private cairo_bool_t
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_cairo_linear_pattern_equal (const cairo_linear_pattern_t *a,
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const cairo_linear_pattern_t *b);
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cairo_private unsigned long
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_cairo_pattern_size (const cairo_pattern_t *pattern);
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cairo_private cairo_bool_t
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_cairo_radial_pattern_equal (const cairo_radial_pattern_t *a,
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const cairo_radial_pattern_t *b);
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cairo_private cairo_bool_t
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_cairo_pattern_equal (const cairo_pattern_t *a,
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const cairo_pattern_t *b);
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/* cairo-mesh-pattern-rasterizer.c */
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cairo_private void
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_cairo_mesh_pattern_rasterize (const cairo_mesh_pattern_t *mesh,
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void *data,
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int width,
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int height,
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int stride,
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double x_offset,
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double y_offset);
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cairo_private cairo_surface_t *
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_cairo_raster_source_pattern_acquire (const cairo_pattern_t *abstract_pattern,
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cairo_surface_t *target,
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const cairo_rectangle_int_t *extents);
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cairo_private void
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_cairo_raster_source_pattern_release (const cairo_pattern_t *abstract_pattern,
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cairo_surface_t *surface);
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cairo_private cairo_status_t
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_cairo_raster_source_pattern_snapshot (cairo_pattern_t *abstract_pattern);
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cairo_private cairo_status_t
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_cairo_raster_source_pattern_init_copy (cairo_pattern_t *pattern,
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const cairo_pattern_t *other);
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cairo_private void
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_cairo_raster_source_pattern_finish (cairo_pattern_t *abstract_pattern);
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cairo_private void
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_cairo_debug_print_pattern (FILE *file, const cairo_pattern_t *pattern);
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CAIRO_END_DECLS
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#endif /* CAIRO_PATTERN_PRIVATE */
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