/* cairo - a vector graphics library with display and print output
*
* Copyright © 2009 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 Red Hat, Inc.
*
* Contributor(s):
* Chris Wilson <chris@chris-wilson.co.uk>
*/
#include "cairoint.h"
#include "cairo-error-private.h"
#include "cairo-composite-rectangles-private.h"
/* A collection of routines to facilitate writing compositors. */
static inline cairo_bool_t
_cairo_composite_rectangles_init (cairo_composite_rectangles_t *extents,
int width, int height,
cairo_operator_t op,
const cairo_pattern_t *source,
cairo_clip_t *clip)
{
extents->unbounded.x = extents->unbounded.y = 0;
extents->unbounded.width = width;
extents->unbounded.height = height;
if (clip != NULL) {
const cairo_rectangle_int_t *clip_extents;
clip_extents = _cairo_clip_get_extents (clip);
if (clip_extents == NULL)
return FALSE;
if (! _cairo_rectangle_intersect (&extents->unbounded, clip_extents))
return FALSE;
}
extents->bounded = extents->unbounded;
extents->is_bounded = _cairo_operator_bounded_by_either (op);
_cairo_pattern_get_extents (source, &extents->source);
if (extents->is_bounded & CAIRO_OPERATOR_BOUND_BY_SOURCE) {
if (! _cairo_rectangle_intersect (&extents->bounded, &extents->source))
return FALSE;
}
return TRUE;
}
cairo_int_status_t
_cairo_composite_rectangles_init_for_paint (cairo_composite_rectangles_t *extents,
int surface_width, int surface_height,
cairo_operator_t op,
const cairo_pattern_t *source,
cairo_clip_t *clip)
{
if (! _cairo_composite_rectangles_init (extents,
surface_width, surface_height,
op, source, clip))
{
return CAIRO_INT_STATUS_NOTHING_TO_DO;
}
extents->mask = extents->bounded;
return CAIRO_STATUS_SUCCESS;
}
static cairo_int_status_t
_cairo_composite_rectangles_intersect (cairo_composite_rectangles_t *extents)
{
cairo_bool_t ret;
ret = _cairo_rectangle_intersect (&extents->bounded, &extents->mask);
if (! ret && extents->is_bounded & CAIRO_OPERATOR_BOUND_BY_MASK)
return CAIRO_INT_STATUS_NOTHING_TO_DO;
return CAIRO_STATUS_SUCCESS;
}
cairo_int_status_t
_cairo_composite_rectangles_init_for_mask (cairo_composite_rectangles_t *extents,
int surface_width, int surface_height,
cairo_operator_t op,
const cairo_pattern_t *source,
const cairo_pattern_t *mask,
cairo_clip_t *clip)
{
if (! _cairo_composite_rectangles_init (extents,
surface_width, surface_height,
op, source, clip))
{
return CAIRO_INT_STATUS_NOTHING_TO_DO;
}
_cairo_pattern_get_extents (mask, &extents->mask);
return _cairo_composite_rectangles_intersect (extents);
}
cairo_int_status_t
_cairo_composite_rectangles_init_for_stroke (cairo_composite_rectangles_t *extents,
int surface_width, int surface_height,
cairo_operator_t op,
const cairo_pattern_t *source,
cairo_path_fixed_t *path,
const cairo_stroke_style_t *style,
const cairo_matrix_t *ctm,
cairo_clip_t *clip)
{
if (! _cairo_composite_rectangles_init (extents,
surface_width, surface_height,
op, source, clip))
{
return CAIRO_INT_STATUS_NOTHING_TO_DO;
}
_cairo_path_fixed_approximate_stroke_extents (path, style, ctm, &extents->mask);
return _cairo_composite_rectangles_intersect (extents);
}
cairo_int_status_t
_cairo_composite_rectangles_init_for_fill (cairo_composite_rectangles_t *extents,
int surface_width, int surface_height,
cairo_operator_t op,
const cairo_pattern_t *source,
cairo_path_fixed_t *path,
cairo_clip_t *clip)
{
if (! _cairo_composite_rectangles_init (extents,
surface_width, surface_height,
op, source, clip))
{
return CAIRO_INT_STATUS_NOTHING_TO_DO;
}
_cairo_path_fixed_approximate_fill_extents (path, &extents->mask);
return _cairo_composite_rectangles_intersect (extents);
}
cairo_int_status_t
_cairo_composite_rectangles_init_for_glyphs (cairo_composite_rectangles_t *extents,
int surface_width, int surface_height,
cairo_operator_t op,
const cairo_pattern_t *source,
cairo_scaled_font_t *scaled_font,
cairo_glyph_t *glyphs,
int num_glyphs,
cairo_clip_t *clip,
cairo_bool_t *overlap)
{
cairo_status_t status;
if (! _cairo_composite_rectangles_init (extents,
surface_width, surface_height,
op, source, clip))
{
return CAIRO_INT_STATUS_NOTHING_TO_DO;
}
status = _cairo_scaled_font_glyph_device_extents (scaled_font,
glyphs, num_glyphs,
&extents->mask,
overlap);
if (unlikely (status))
return status;
return _cairo_composite_rectangles_intersect (extents);
}