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cairo-default-context.c
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/* -*- Mode: c; c-basic-offset: 4; indent-tabs-mode: t; tab-width: 8; -*- */
/* cairo - a vector graphics library with display and print output
*
* Copyright © 2002 University of Southern California
* Copyright © 2005 Red Hat, Inc.
* Copyright © 2011 Intel Corporation
*
* 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 University of Southern
* California.
*
* Contributor(s):
* Carl D. Worth <[email protected]>
* Chris Wilson <[email protected]>
*/
#include "cairoint.h"
#include "cairo-private.h"
#include "cairo-arc-private.h"
#include "cairo-backend-private.h"
#include "cairo-clip-inline.h"
#include "cairo-default-context-private.h"
#include "cairo-error-private.h"
#include "cairo-freed-pool-private.h"
#include "cairo-path-private.h"
#include "cairo-pattern-private.h"
#define CAIRO_TOLERANCE_MINIMUM _cairo_fixed_to_double(1)
#if !defined(INFINITY)
#define INFINITY HUGE_VAL
#endif
static freed_pool_t context_pool;
void
_cairo_default_context_reset_static_data (void)
{
_freed_pool_reset (&context_pool);
}
void
_cairo_default_context_fini (cairo_default_context_t *cr)
{
while (cr->gstate != &cr->gstate_tail[0]) {
if (_cairo_gstate_restore (&cr->gstate, &cr->gstate_freelist))
break;
}
_cairo_gstate_fini (cr->gstate);
cr->gstate_freelist = cr->gstate_freelist->next; /* skip over tail[1] */
while (cr->gstate_freelist != NULL) {
cairo_gstate_t *gstate = cr->gstate_freelist;
cr->gstate_freelist = gstate->next;
free (gstate);
}
_cairo_path_fixed_fini (cr->path);
_cairo_fini (&cr->base);
}
static void
_cairo_default_context_destroy (void *abstract_cr)
{
cairo_default_context_t *cr = abstract_cr;
_cairo_default_context_fini (cr);
/* mark the context as invalid to protect against misuse */
cr->base.status = CAIRO_STATUS_NULL_POINTER;
_freed_pool_put (&context_pool, cr);
}
static cairo_surface_t *
_cairo_default_context_get_original_target (void *abstract_cr)
{
cairo_default_context_t *cr = abstract_cr;
return _cairo_gstate_get_original_target (cr->gstate);
}
static cairo_surface_t *
_cairo_default_context_get_current_target (void *abstract_cr)
{
cairo_default_context_t *cr = abstract_cr;
return _cairo_gstate_get_target (cr->gstate);
}
static cairo_status_t
_cairo_default_context_save (void *abstract_cr)
{
cairo_default_context_t *cr = abstract_cr;
return _cairo_gstate_save (&cr->gstate, &cr->gstate_freelist);
}
static cairo_status_t
_cairo_default_context_restore (void *abstract_cr)
{
cairo_default_context_t *cr = abstract_cr;
if (unlikely (_cairo_gstate_is_group (cr->gstate)))
return _cairo_error (CAIRO_STATUS_INVALID_RESTORE);
return _cairo_gstate_restore (&cr->gstate, &cr->gstate_freelist);
}
static cairo_status_t
_cairo_default_context_push_group (void *abstract_cr, cairo_content_t content)
{
cairo_default_context_t *cr = abstract_cr;
cairo_surface_t *group_surface;
cairo_clip_t *clip;
cairo_status_t status;
clip = _cairo_gstate_get_clip (cr->gstate);
if (_cairo_clip_is_all_clipped (clip)) {
group_surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, 0, 0);
status = group_surface->status;
if (unlikely (status))
goto bail;
} else {
cairo_surface_t *parent_surface;
cairo_rectangle_int_t extents;
cairo_bool_t is_empty;
parent_surface = _cairo_gstate_get_target (cr->gstate);
/* Get the extents that we'll use in creating our new group surface */
is_empty = _cairo_surface_get_extents (parent_surface, &extents);
if (clip)
is_empty = _cairo_rectangle_intersect (&extents,
_cairo_clip_get_extents (clip));
/* XXX unbounded surface creation */
group_surface = _cairo_surface_create_similar_solid (parent_surface,
content,
extents.width,
extents.height,
CAIRO_COLOR_TRANSPARENT);
status = group_surface->status;
if (unlikely (status))
goto bail;
/* Set device offsets on the new surface so that logically it appears at
* the same location on the parent surface -- when we pop_group this,
* the source pattern will get fixed up for the appropriate target surface
* device offsets, so we want to set our own surface offsets from /that/,
* and not from the device origin. */
cairo_surface_set_device_offset (group_surface,
parent_surface->device_transform.x0 - extents.x,
parent_surface->device_transform.y0 - extents.y);
/* If we have a current path, we need to adjust it to compensate for
* the device offset just applied. */
_cairo_path_fixed_translate (cr->path,
_cairo_fixed_from_int (-extents.x),
_cairo_fixed_from_int (-extents.y));
}
/* create a new gstate for the redirect */
status = _cairo_gstate_save (&cr->gstate, &cr->gstate_freelist);
if (unlikely (status))
goto bail;
status = _cairo_gstate_redirect_target (cr->gstate, group_surface);
bail:
cairo_surface_destroy (group_surface);
return status;
}
static cairo_pattern_t *
_cairo_default_context_pop_group (void *abstract_cr)
{
cairo_default_context_t *cr = abstract_cr;
cairo_surface_t *group_surface;
cairo_pattern_t *group_pattern;
cairo_matrix_t group_matrix, device_transform_matrix;
cairo_status_t status;
/* Verify that we are at the right nesting level */
if (unlikely (! _cairo_gstate_is_group (cr->gstate)))
return _cairo_pattern_create_in_error (CAIRO_STATUS_INVALID_POP_GROUP);
/* Get a reference to the active surface before restoring */
group_surface = _cairo_gstate_get_target (cr->gstate);
group_surface = cairo_surface_reference (group_surface);
status = _cairo_gstate_restore (&cr->gstate, &cr->gstate_freelist);
assert (status == CAIRO_STATUS_SUCCESS);
group_pattern = cairo_pattern_create_for_surface (group_surface);
status = group_pattern->status;
if (unlikely (status))
goto done;
_cairo_gstate_get_matrix (cr->gstate, &group_matrix);
/* Transform by group_matrix centered around device_transform so that when
* we call _cairo_gstate_copy_transformed_pattern the result is a pattern
* with a matrix equivalent to the device_transform of group_surface. */
if (_cairo_surface_has_device_transform (group_surface)) {
cairo_pattern_set_matrix (group_pattern, &group_surface->device_transform);
_cairo_pattern_transform (group_pattern, &group_matrix);
_cairo_pattern_transform (group_pattern, &group_surface->device_transform_inverse);
} else {
cairo_pattern_set_matrix (group_pattern, &group_matrix);
}
/* If we have a current path, we need to adjust it to compensate for
* the device offset just removed. */
cairo_matrix_multiply (&device_transform_matrix,
&_cairo_gstate_get_target (cr->gstate)->device_transform,
&group_surface->device_transform_inverse);
_cairo_path_fixed_transform (cr->path, &device_transform_matrix);
done:
cairo_surface_destroy (group_surface);
return group_pattern;
}
static cairo_status_t
_cairo_default_context_set_source (void *abstract_cr,
cairo_pattern_t *source)
{
cairo_default_context_t *cr = abstract_cr;
return _cairo_gstate_set_source (cr->gstate, source);
}
static cairo_bool_t
_current_source_matches_solid (const cairo_pattern_t *pattern,
double red,
double green,
double blue,
double alpha)
{
cairo_color_t color;
if (pattern->type != CAIRO_PATTERN_TYPE_SOLID)
return FALSE;
red = _cairo_restrict_value (red, 0.0, 1.0);
green = _cairo_restrict_value (green, 0.0, 1.0);
blue = _cairo_restrict_value (blue, 0.0, 1.0);
alpha = _cairo_restrict_value (alpha, 0.0, 1.0);
_cairo_color_init_rgba (&color, red, green, blue, alpha);
return _cairo_color_equal (&color,
&((cairo_solid_pattern_t *) pattern)->color);
}
static cairo_status_t
_cairo_default_context_set_source_rgba (void *abstract_cr, double red, double green, double blue, double alpha)
{
cairo_default_context_t *cr = abstract_cr;
cairo_pattern_t *pattern;
cairo_status_t status;
if (_current_source_matches_solid (cr->gstate->source,
red, green, blue, alpha))
return CAIRO_STATUS_SUCCESS;
/* push the current pattern to the freed lists */
_cairo_default_context_set_source (cr, (cairo_pattern_t *) &_cairo_pattern_black);
pattern = cairo_pattern_create_rgba (red, green, blue, alpha);
if (unlikely (pattern->status))
return pattern->status;
status = _cairo_default_context_set_source (cr, pattern);
cairo_pattern_destroy (pattern);
return status;
}
static cairo_status_t
_cairo_default_context_set_source_surface (void *abstract_cr,
cairo_surface_t *surface,
double x,
double y)
{
cairo_default_context_t *cr = abstract_cr;
cairo_pattern_t *pattern;
cairo_matrix_t matrix;
cairo_status_t status;
/* push the current pattern to the freed lists */
_cairo_default_context_set_source (cr, (cairo_pattern_t *) &_cairo_pattern_black);
pattern = cairo_pattern_create_for_surface (surface);
if (unlikely (pattern->status))
return pattern->status;
cairo_matrix_init_translate (&matrix, -x, -y);
cairo_pattern_set_matrix (pattern, &matrix);
status = _cairo_default_context_set_source (cr, pattern);
cairo_pattern_destroy (pattern);
return status;
}
static cairo_pattern_t *
_cairo_default_context_get_source (void *abstract_cr)
{
cairo_default_context_t *cr = abstract_cr;
return _cairo_gstate_get_source (cr->gstate);
}
static cairo_status_t
_cairo_default_context_set_tolerance (void *abstract_cr,
double tolerance)
{
cairo_default_context_t *cr = abstract_cr;
if (tolerance < CAIRO_TOLERANCE_MINIMUM)
tolerance = CAIRO_TOLERANCE_MINIMUM;
return _cairo_gstate_set_tolerance (cr->gstate, tolerance);
}
static cairo_status_t
_cairo_default_context_set_operator (void *abstract_cr, cairo_operator_t op)
{
cairo_default_context_t *cr = abstract_cr;
return _cairo_gstate_set_operator (cr->gstate, op);
}
static cairo_status_t
_cairo_default_context_set_opacity (void *abstract_cr, double opacity)
{
cairo_default_context_t *cr = abstract_cr;
return _cairo_gstate_set_opacity (cr->gstate, opacity);
}
static cairo_status_t
_cairo_default_context_set_antialias (void *abstract_cr,
cairo_antialias_t antialias)
{
cairo_default_context_t *cr = abstract_cr;
return _cairo_gstate_set_antialias (cr->gstate, antialias);
}
static cairo_status_t
_cairo_default_context_set_fill_rule (void *abstract_cr,
cairo_fill_rule_t fill_rule)
{
cairo_default_context_t *cr = abstract_cr;
return _cairo_gstate_set_fill_rule (cr->gstate, fill_rule);
}
static cairo_status_t
_cairo_default_context_set_line_width (void *abstract_cr,
double line_width)
{
cairo_default_context_t *cr = abstract_cr;
return _cairo_gstate_set_line_width (cr->gstate, line_width);
}
static cairo_status_t
_cairo_default_context_set_line_cap (void *abstract_cr,
cairo_line_cap_t line_cap)
{
cairo_default_context_t *cr = abstract_cr;
return _cairo_gstate_set_line_cap (cr->gstate, line_cap);
}
static cairo_status_t
_cairo_default_context_set_line_join (void *abstract_cr,
cairo_line_join_t line_join)
{
cairo_default_context_t *cr = abstract_cr;
return _cairo_gstate_set_line_join (cr->gstate, line_join);
}
static cairo_status_t
_cairo_default_context_set_dash (void *abstract_cr,
const double *dashes,
int num_dashes,
double offset)
{
cairo_default_context_t *cr = abstract_cr;
return _cairo_gstate_set_dash (cr->gstate,
dashes, num_dashes, offset);
}
static cairo_status_t
_cairo_default_context_set_miter_limit (void *abstract_cr,
double limit)
{
cairo_default_context_t *cr = abstract_cr;
return _cairo_gstate_set_miter_limit (cr->gstate, limit);
}
static cairo_antialias_t
_cairo_default_context_get_antialias (void *abstract_cr)
{
cairo_default_context_t *cr = abstract_cr;
return _cairo_gstate_get_antialias (cr->gstate);
}
static void
_cairo_default_context_get_dash (void *abstract_cr,
double *dashes,
int *num_dashes,
double *offset)
{
cairo_default_context_t *cr = abstract_cr;
_cairo_gstate_get_dash (cr->gstate, dashes, num_dashes, offset);
}
static cairo_fill_rule_t
_cairo_default_context_get_fill_rule (void *abstract_cr)
{
cairo_default_context_t *cr = abstract_cr;
return _cairo_gstate_get_fill_rule (cr->gstate);
}
static double
_cairo_default_context_get_line_width (void *abstract_cr)
{
cairo_default_context_t *cr = abstract_cr;
return _cairo_gstate_get_line_width (cr->gstate);
}
static cairo_line_cap_t
_cairo_default_context_get_line_cap (void *abstract_cr)
{
cairo_default_context_t *cr = abstract_cr;
return _cairo_gstate_get_line_cap (cr->gstate);
}
static cairo_line_join_t
_cairo_default_context_get_line_join (void *abstract_cr)
{
cairo_default_context_t *cr = abstract_cr;
return _cairo_gstate_get_line_join (cr->gstate);
}
static double
_cairo_default_context_get_miter_limit (void *abstract_cr)
{
cairo_default_context_t *cr = abstract_cr;
return _cairo_gstate_get_miter_limit (cr->gstate);
}
static cairo_operator_t
_cairo_default_context_get_operator (void *abstract_cr)
{
cairo_default_context_t *cr = abstract_cr;
return _cairo_gstate_get_operator (cr->gstate);
}
static double
_cairo_default_context_get_opacity (void *abstract_cr)
{
cairo_default_context_t *cr = abstract_cr;
return _cairo_gstate_get_opacity (cr->gstate);
}
static double
_cairo_default_context_get_tolerance (void *abstract_cr)
{
cairo_default_context_t *cr = abstract_cr;
return _cairo_gstate_get_tolerance (cr->gstate);
}
/* Current tranformation matrix */
static cairo_status_t
_cairo_default_context_translate (void *abstract_cr,
double tx,
double ty)
{
cairo_default_context_t *cr = abstract_cr;
return _cairo_gstate_translate (cr->gstate, tx, ty);
}
static cairo_status_t
_cairo_default_context_scale (void *abstract_cr,
double sx,
double sy)
{
cairo_default_context_t *cr = abstract_cr;
return _cairo_gstate_scale (cr->gstate, sx, sy);
}
static cairo_status_t
_cairo_default_context_rotate (void *abstract_cr,
double theta)
{
cairo_default_context_t *cr = abstract_cr;
return _cairo_gstate_rotate (cr->gstate, theta);
}
static cairo_status_t
_cairo_default_context_transform (void *abstract_cr,
const cairo_matrix_t *matrix)
{
cairo_default_context_t *cr = abstract_cr;
return _cairo_gstate_transform (cr->gstate, matrix);
}
static cairo_status_t
_cairo_default_context_set_matrix (void *abstract_cr,
const cairo_matrix_t *matrix)
{
cairo_default_context_t *cr = abstract_cr;
return _cairo_gstate_set_matrix (cr->gstate, matrix);
}
static cairo_status_t
_cairo_default_context_set_identity_matrix (void *abstract_cr)
{
cairo_default_context_t *cr = abstract_cr;
_cairo_gstate_identity_matrix (cr->gstate);
return CAIRO_STATUS_SUCCESS;
}
static void
_cairo_default_context_get_matrix (void *abstract_cr,
cairo_matrix_t *matrix)
{
cairo_default_context_t *cr = abstract_cr;
_cairo_gstate_get_matrix (cr->gstate, matrix);
}
static void
_cairo_default_context_user_to_device (void *abstract_cr,
double *x,
double *y)
{
cairo_default_context_t *cr = abstract_cr;
_cairo_gstate_user_to_device (cr->gstate, x, y);
}
static void
_cairo_default_context_user_to_device_distance (void *abstract_cr, double *dx, double *dy)
{
cairo_default_context_t *cr = abstract_cr;
_cairo_gstate_user_to_device_distance (cr->gstate, dx, dy);
}
static void
_cairo_default_context_device_to_user (void *abstract_cr,
double *x,
double *y)
{
cairo_default_context_t *cr = abstract_cr;
_cairo_gstate_device_to_user (cr->gstate, x, y);
}
static void
_cairo_default_context_device_to_user_distance (void *abstract_cr,
double *dx,
double *dy)
{
cairo_default_context_t *cr = abstract_cr;
_cairo_gstate_device_to_user_distance (cr->gstate, dx, dy);
}
static void
_cairo_default_context_backend_to_user (void *abstract_cr,
double *x,
double *y)
{
cairo_default_context_t *cr = abstract_cr;
_cairo_gstate_backend_to_user (cr->gstate, x, y);
}
static void
_cairo_default_context_backend_to_user_distance (void *abstract_cr, double *dx, double *dy)
{
cairo_default_context_t *cr = abstract_cr;
_cairo_gstate_backend_to_user_distance (cr->gstate, dx, dy);
}
static void
_cairo_default_context_user_to_backend (void *abstract_cr,
double *x,
double *y)
{
cairo_default_context_t *cr = abstract_cr;
_cairo_gstate_user_to_backend (cr->gstate, x, y);
}
static void
_cairo_default_context_user_to_backend_distance (void *abstract_cr,
double *dx,
double *dy)
{
cairo_default_context_t *cr = abstract_cr;
_cairo_gstate_user_to_backend_distance (cr->gstate, dx, dy);
}
/* Path constructor */
static cairo_status_t
_cairo_default_context_new_path (void *abstract_cr)
{
cairo_default_context_t *cr = abstract_cr;
_cairo_path_fixed_fini (cr->path);
_cairo_path_fixed_init (cr->path);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_cairo_default_context_new_sub_path (void *abstract_cr)
{
cairo_default_context_t *cr = abstract_cr;
_cairo_path_fixed_new_sub_path (cr->path);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_cairo_default_context_move_to (void *abstract_cr, double x, double y)
{
cairo_default_context_t *cr = abstract_cr;
cairo_fixed_t x_fixed, y_fixed;
_cairo_gstate_user_to_backend (cr->gstate, &x, &y);
x_fixed = _cairo_fixed_from_double (x);
y_fixed = _cairo_fixed_from_double (y);
return _cairo_path_fixed_move_to (cr->path, x_fixed, y_fixed);
}
static cairo_status_t
_cairo_default_context_line_to (void *abstract_cr, double x, double y)
{
cairo_default_context_t *cr = abstract_cr;
cairo_fixed_t x_fixed, y_fixed;
_cairo_gstate_user_to_backend (cr->gstate, &x, &y);
x_fixed = _cairo_fixed_from_double (x);
y_fixed = _cairo_fixed_from_double (y);
return _cairo_path_fixed_line_to (cr->path, x_fixed, y_fixed);
}
static cairo_status_t
_cairo_default_context_curve_to (void *abstract_cr,
double x1, double y1,
double x2, double y2,
double x3, double y3)
{
cairo_default_context_t *cr = abstract_cr;
cairo_fixed_t x1_fixed, y1_fixed;
cairo_fixed_t x2_fixed, y2_fixed;
cairo_fixed_t x3_fixed, y3_fixed;
_cairo_gstate_user_to_backend (cr->gstate, &x1, &y1);
_cairo_gstate_user_to_backend (cr->gstate, &x2, &y2);
_cairo_gstate_user_to_backend (cr->gstate, &x3, &y3);
x1_fixed = _cairo_fixed_from_double (x1);
y1_fixed = _cairo_fixed_from_double (y1);
x2_fixed = _cairo_fixed_from_double (x2);
y2_fixed = _cairo_fixed_from_double (y2);
x3_fixed = _cairo_fixed_from_double (x3);
y3_fixed = _cairo_fixed_from_double (y3);
return _cairo_path_fixed_curve_to (cr->path,
x1_fixed, y1_fixed,
x2_fixed, y2_fixed,
x3_fixed, y3_fixed);
}
static cairo_status_t
_cairo_default_context_arc (void *abstract_cr,
double xc, double yc, double radius,
double angle1, double angle2,
cairo_bool_t forward)
{
cairo_default_context_t *cr = abstract_cr;
cairo_status_t status;
/* Do nothing, successfully, if radius is <= 0 */
if (radius <= 0.0) {
cairo_fixed_t x_fixed, y_fixed;
_cairo_gstate_user_to_backend (cr->gstate, &xc, &yc);
x_fixed = _cairo_fixed_from_double (xc);
y_fixed = _cairo_fixed_from_double (yc);
status = _cairo_path_fixed_line_to (cr->path, x_fixed, y_fixed);
if (unlikely (status))
return status;
status = _cairo_path_fixed_line_to (cr->path, x_fixed, y_fixed);
if (unlikely (status))
return status;
return CAIRO_STATUS_SUCCESS;
}
status = _cairo_default_context_line_to (cr,
xc + radius * cos (angle1),
yc + radius * sin (angle1));
if (unlikely (status))
return status;
if (forward)
_cairo_arc_path (&cr->base, xc, yc, radius, angle1, angle2);
else
_cairo_arc_path_negative (&cr->base, xc, yc, radius, angle1, angle2);
return CAIRO_STATUS_SUCCESS; /* any error will have already been set on cr */
}
static cairo_status_t
_cairo_default_context_rel_move_to (void *abstract_cr, double dx, double dy)
{
cairo_default_context_t *cr = abstract_cr;
cairo_fixed_t dx_fixed, dy_fixed;
_cairo_gstate_user_to_backend_distance (cr->gstate, &dx, &dy);
dx_fixed = _cairo_fixed_from_double (dx);
dy_fixed = _cairo_fixed_from_double (dy);
return _cairo_path_fixed_rel_move_to (cr->path, dx_fixed, dy_fixed);
}
static cairo_status_t
_cairo_default_context_rel_line_to (void *abstract_cr, double dx, double dy)
{
cairo_default_context_t *cr = abstract_cr;
cairo_fixed_t dx_fixed, dy_fixed;
_cairo_gstate_user_to_backend_distance (cr->gstate, &dx, &dy);
dx_fixed = _cairo_fixed_from_double (dx);
dy_fixed = _cairo_fixed_from_double (dy);
return _cairo_path_fixed_rel_line_to (cr->path, dx_fixed, dy_fixed);
}
static cairo_status_t
_cairo_default_context_rel_curve_to (void *abstract_cr,
double dx1, double dy1,
double dx2, double dy2,
double dx3, double dy3)
{
cairo_default_context_t *cr = abstract_cr;
cairo_fixed_t dx1_fixed, dy1_fixed;
cairo_fixed_t dx2_fixed, dy2_fixed;
cairo_fixed_t dx3_fixed, dy3_fixed;
_cairo_gstate_user_to_backend_distance (cr->gstate, &dx1, &dy1);
_cairo_gstate_user_to_backend_distance (cr->gstate, &dx2, &dy2);
_cairo_gstate_user_to_backend_distance (cr->gstate, &dx3, &dy3);
dx1_fixed = _cairo_fixed_from_double (dx1);
dy1_fixed = _cairo_fixed_from_double (dy1);
dx2_fixed = _cairo_fixed_from_double (dx2);
dy2_fixed = _cairo_fixed_from_double (dy2);
dx3_fixed = _cairo_fixed_from_double (dx3);
dy3_fixed = _cairo_fixed_from_double (dy3);
return _cairo_path_fixed_rel_curve_to (cr->path,
dx1_fixed, dy1_fixed,
dx2_fixed, dy2_fixed,
dx3_fixed, dy3_fixed);
}
static cairo_status_t
_cairo_default_context_close_path (void *abstract_cr)
{
cairo_default_context_t *cr = abstract_cr;
return _cairo_path_fixed_close_path (cr->path);
}
static cairo_status_t
_cairo_default_context_rectangle (void *abstract_cr,
double x, double y,
double width, double height)
{
cairo_default_context_t *cr = abstract_cr;
cairo_status_t status;
status = _cairo_default_context_move_to (cr, x, y);
if (unlikely (status))
return status;
status = _cairo_default_context_rel_line_to (cr, width, 0);
if (unlikely (status))
return status;
status = _cairo_default_context_rel_line_to (cr, 0, height);
if (unlikely (status))
return status;
status = _cairo_default_context_rel_line_to (cr, -width, 0);
if (unlikely (status))
return status;
return _cairo_default_context_close_path (cr);
}
static void
_cairo_default_context_path_extents (void *abstract_cr,
double *x1,
double *y1,
double *x2,
double *y2)
{
cairo_default_context_t *cr = abstract_cr;
_cairo_gstate_path_extents (cr->gstate,
cr->path,
x1, y1, x2, y2);
}
static cairo_bool_t
_cairo_default_context_has_current_point (void *abstract_cr)
{
cairo_default_context_t *cr = abstract_cr;
return cr->path->has_current_point;
}
static cairo_bool_t
_cairo_default_context_get_current_point (void *abstract_cr,
double *x,
double *y)
{
cairo_default_context_t *cr = abstract_cr;
cairo_fixed_t x_fixed, y_fixed;
if (_cairo_path_fixed_get_current_point (cr->path, &x_fixed, &y_fixed))
{
*x = _cairo_fixed_to_double (x_fixed);
*y = _cairo_fixed_to_double (y_fixed);
_cairo_gstate_backend_to_user (cr->gstate, x, y);
return TRUE;
}
else
{
return FALSE;
}
}
static cairo_path_t *
_cairo_default_context_copy_path (void *abstract_cr)
{
cairo_default_context_t *cr = abstract_cr;
return _cairo_path_create (cr->path, &cr->base);
}
static cairo_path_t *
_cairo_default_context_copy_path_flat (void *abstract_cr)
{
cairo_default_context_t *cr = abstract_cr;
return _cairo_path_create_flat (cr->path, &cr->base);
}
static cairo_status_t
_cairo_default_context_append_path (void *abstract_cr,
const cairo_path_t *path)
{
cairo_default_context_t *cr = abstract_cr;
return _cairo_path_append_to_context (path, &cr->base);
}
static cairo_status_t
_cairo_default_context_paint (void *abstract_cr)
{
cairo_default_context_t *cr = abstract_cr;
return _cairo_gstate_paint (cr->gstate);
}
static cairo_status_t
_cairo_default_context_paint_with_alpha (void *abstract_cr,
double alpha)
{
cairo_default_context_t *cr = abstract_cr;
cairo_solid_pattern_t pattern;
cairo_status_t status;
cairo_color_t color;
if (CAIRO_ALPHA_IS_OPAQUE (alpha))
return _cairo_gstate_paint (cr->gstate);
if (CAIRO_ALPHA_IS_ZERO (alpha) &&
_cairo_operator_bounded_by_mask (cr->gstate->op)) {
return CAIRO_STATUS_SUCCESS;
}
_cairo_color_init_rgba (&color, 0., 0., 0., alpha);
_cairo_pattern_init_solid (&pattern, &color);
status = _cairo_gstate_mask (cr->gstate, &pattern.base);
_cairo_pattern_fini (&pattern.base);
return status;
}
static cairo_status_t
_cairo_default_context_mask (void *abstract_cr,
cairo_pattern_t *mask)
{
cairo_default_context_t *cr = abstract_cr;
return _cairo_gstate_mask (cr->gstate, mask);
}
static cairo_status_t
_cairo_default_context_stroke_preserve (void *abstract_cr)
{
cairo_default_context_t *cr = abstract_cr;
return _cairo_gstate_stroke (cr->gstate, cr->path);
}
static cairo_status_t
_cairo_default_context_stroke (void *abstract_cr)
{
cairo_default_context_t *cr = abstract_cr;