mirror of
https://gitlab.freedesktop.org/cairo/cairo.git
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af9fbd176b
Having spent the last dev cycle looking at how we could specialize the compositors for various backends, we once again look for the commonalities in order to reduce the duplication. In part this is motivated by the idea that spans is a good interface for both the existent GL backend and pixman, and so they deserve a dedicated compositor. xcb/xlib target an identical rendering system and so they should be using the same compositor, and it should be possible to run that same compositor locally against pixman to generate reference tests. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> P.S. This brings massive upheaval (read breakage) I've tried delaying in order to fix as many things as possible but now this one patch does far, far, far too much. Apologies in advance for breaking your favourite backend, but trust me in that the end result will be much better. :)
338 lines
9.8 KiB
C
338 lines
9.8 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 <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 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_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 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 void
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_cairo_pattern_fini_snapshot (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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static inline void
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_cairo_pattern_add_observer (cairo_pattern_t *pattern,
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cairo_pattern_observer_t *observer,
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void (*func) (cairo_pattern_observer_t *,
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cairo_pattern_t *,
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unsigned int))
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{
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observer->notify = func;
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cairo_list_add (&observer->link, &pattern->observers);
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}
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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 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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