93 lines
2.4 KiB
C
93 lines
2.4 KiB
C
/*
|
|
* Clutter.
|
|
*
|
|
* An OpenGL based 'interactive canvas' library.
|
|
*
|
|
* Copyright (C) 2012 Intel Corporation
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
/**
|
|
* SECTION:clutter-cairo
|
|
* @Title: Cairo integration
|
|
* @Short_Description: Functions for interoperating with Cairo
|
|
*
|
|
* Clutter provides some utility functions for using Cairo.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include "clutter-cairo.h"
|
|
#include "clutter-color.h"
|
|
|
|
/**
|
|
* clutter_cairo_set_source_color:
|
|
* @cr: a Cairo context
|
|
* @color: a #ClutterColor
|
|
*
|
|
* Utility function for setting the source color of @cr using
|
|
* a #ClutterColor. This function is the equivalent of:
|
|
*
|
|
* |[
|
|
* cairo_set_source_rgba (cr,
|
|
* color->red / 255.0,
|
|
* color->green / 255.0,
|
|
* color->blue / 255.0,
|
|
* color->alpha / 255.0);
|
|
* ]|
|
|
*
|
|
* Since: 1.0
|
|
*/
|
|
void
|
|
clutter_cairo_set_source_color (cairo_t *cr,
|
|
const ClutterColor *color)
|
|
{
|
|
g_return_if_fail (cr != NULL);
|
|
g_return_if_fail (color != NULL);
|
|
|
|
if (color->alpha == 0xff)
|
|
cairo_set_source_rgb (cr,
|
|
color->red / 255.0,
|
|
color->green / 255.0,
|
|
color->blue / 255.0);
|
|
else
|
|
cairo_set_source_rgba (cr,
|
|
color->red / 255.0,
|
|
color->green / 255.0,
|
|
color->blue / 255.0,
|
|
color->alpha / 255.0);
|
|
}
|
|
|
|
/**
|
|
* clutter_cairo_clear:
|
|
* @cr: a Cairo context
|
|
*
|
|
* Utility function to clear a Cairo context.
|
|
*
|
|
* Since: 1.12
|
|
*/
|
|
void
|
|
clutter_cairo_clear (cairo_t *cr)
|
|
{
|
|
cairo_save (cr);
|
|
|
|
cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
|
|
cairo_paint (cr);
|
|
|
|
cairo_restore (cr);
|
|
}
|