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a0441778ad
Since the Cogl 1.18 branch is actively maintained in parallel with the
master branch; this is a counter part to commit 1b83ef938fc16b which
re-licensed the master branch to use the MIT license.
This re-licensing is a follow up to the proposal that was sent to the
Cogl mailing list:
http://lists.freedesktop.org/archives/cogl/2013-December/001465.html
Note: there was a copyright assignment policy in place for Clutter (and
therefore Cogl which was part of Clutter at the time) until the 11th of
June 2010 and so we only checked the details after that point (commit
0bbf50f905)
For each file, authors were identified via this Git command:
$ git blame -p -C -C -C20 -M -M10 0bbf50f905..HEAD
We received blanket approvals for re-licensing all Red Hat and Collabora
contributions which reduced how many people needed to be contacted
individually:
- http://lists.freedesktop.org/archives/cogl/2013-December/001470.html
- http://lists.freedesktop.org/archives/cogl/2014-January/001536.html
Individual approval requests were sent to all the other identified authors
who all confirmed the re-license on the Cogl mailinglist:
http://lists.freedesktop.org/archives/cogl/2014-January
As well as updating the copyright header in all sources files, the
COPYING file has been updated to reflect the license change and also
document the other licenses used in Cogl such as the SGI Free Software
License B, version 2.0 and the 3-clause BSD license.
This patch was not simply cherry-picked from master; but the same
methodology was used to check the source files.
592 lines
14 KiB
C
592 lines
14 KiB
C
/*
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* Cogl
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*
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* A Low Level GPU Graphics and Utilities API
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*
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* Copyright (C) 2008,2009 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy,
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* modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*
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*/
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#if !defined(__COGL_H_INSIDE__) && !defined(COGL_COMPILATION)
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#error "Only <cogl/cogl.h> can be included directly."
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#endif
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#ifndef __COGL_COLOR_H__
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#define __COGL_COLOR_H__
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/**
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* SECTION:cogl-color
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* @short_description: A generic color definition
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*
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* #CoglColor is a simple structure holding the definition of a color such
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* that it can be efficiently used by GL
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*
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* Since: 1.0
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*/
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#include <cogl/cogl-types.h>
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#include <cogl/cogl-macros.h>
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COGL_BEGIN_DECLS
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/**
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* cogl_color_new:
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*
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* Creates a new (empty) color
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*
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* Return value: a newly-allocated #CoglColor. Use cogl_color_free()
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* to free the allocated resources
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*
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* Since: 1.0
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*/
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CoglColor *
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cogl_color_new (void);
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/**
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* cogl_color_copy:
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* @color: the color to copy
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*
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* Creates a copy of @color
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*
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* Return value: a newly-allocated #CoglColor. Use cogl_color_free()
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* to free the allocate resources
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*
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* Since: 1.0
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*/
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CoglColor *
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cogl_color_copy (const CoglColor *color);
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/**
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* cogl_color_free:
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* @color: the color to free
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*
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* Frees the resources allocated by cogl_color_new() and cogl_color_copy()
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*
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* Since: 1.0
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*/
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void
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cogl_color_free (CoglColor *color);
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/**
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* cogl_color_init_from_4ub:
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* @color: A pointer to a #CoglColor to initialize
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* @red: value of the red channel, between 0 and 255
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* @green: value of the green channel, between 0 and 255
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* @blue: value of the blue channel, between 0 and 255
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* @alpha: value of the alpha channel, between 0 and 255
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*
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* Sets the values of the passed channels into a #CoglColor.
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*
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* Since: 1.4
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*/
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void
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cogl_color_init_from_4ub (CoglColor *color,
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uint8_t red,
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uint8_t green,
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uint8_t blue,
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uint8_t alpha);
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/**
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* cogl_color_set_from_4ub:
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* @color: A pointer to a #CoglColor to initialize
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* @red: value of the red channel, between 0 and 255
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* @green: value of the green channel, between 0 and 255
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* @blue: value of the blue channel, between 0 and 255
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* @alpha: value of the alpha channel, between 0 and 255
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*
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* Sets the values of the passed channels into a #CoglColor.
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*
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* Since: 1.0
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* Deprecated: 1.4: Use cogl_color_init_from_4ub instead.
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*/
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COGL_DEPRECATED_IN_1_4_FOR (cogl_color_init_from_4ub)
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void
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cogl_color_set_from_4ub (CoglColor *color,
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uint8_t red,
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uint8_t green,
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uint8_t blue,
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uint8_t alpha);
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/**
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* cogl_color_init_from_4f:
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* @color: A pointer to a #CoglColor to initialize
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* @red: value of the red channel, between 0 and 1.0
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* @green: value of the green channel, between 0 and 1.0
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* @blue: value of the blue channel, between 0 and 1.0
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* @alpha: value of the alpha channel, between 0 and 1.0
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*
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* Sets the values of the passed channels into a #CoglColor
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*
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* Since: 1.4
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*/
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void
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cogl_color_init_from_4f (CoglColor *color,
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float red,
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float green,
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float blue,
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float alpha);
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/**
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* cogl_color_set_from_4f:
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* @color: A pointer to a #CoglColor to initialize
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* @red: value of the red channel, between 0 and %1.0
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* @green: value of the green channel, between 0 and %1.0
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* @blue: value of the blue channel, between 0 and %1.0
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* @alpha: value of the alpha channel, between 0 and %1.0
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*
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* Sets the values of the passed channels into a #CoglColor
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*
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* Since: 1.0
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* Deprecated: 1.4: Use cogl_color_init_from_4f instead.
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*/
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COGL_DEPRECATED_IN_1_4_FOR (cogl_color_init_from_4f)
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void
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cogl_color_set_from_4f (CoglColor *color,
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float red,
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float green,
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float blue,
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float alpha);
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/**
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* cogl_color_init_from_4fv:
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* @color: A pointer to a #CoglColor to initialize
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* @color_array: a pointer to an array of 4 float color components
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*
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* Sets the values of the passed channels into a #CoglColor
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*
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* Since: 1.4
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*/
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void
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cogl_color_init_from_4fv (CoglColor *color,
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const float *color_array);
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/**
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* cogl_color_get_red_byte:
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* @color: a #CoglColor
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*
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* Retrieves the red channel of @color as a byte value
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* between 0 and 255
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*
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* Return value: the red channel of the passed color
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*
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* Since: 1.0
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*/
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unsigned char
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cogl_color_get_red_byte (const CoglColor *color);
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/**
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* cogl_color_get_green_byte:
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* @color: a #CoglColor
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*
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* Retrieves the green channel of @color as a byte value
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* between 0 and 255
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*
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* Return value: the green channel of the passed color
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*
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* Since: 1.0
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*/
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unsigned char
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cogl_color_get_green_byte (const CoglColor *color);
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/**
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* cogl_color_get_blue_byte:
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* @color: a #CoglColor
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*
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* Retrieves the blue channel of @color as a byte value
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* between 0 and 255
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*
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* Return value: the blue channel of the passed color
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*
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* Since: 1.0
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*/
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unsigned char
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cogl_color_get_blue_byte (const CoglColor *color);
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/**
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* cogl_color_get_alpha_byte:
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* @color: a #CoglColor
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*
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* Retrieves the alpha channel of @color as a byte value
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* between 0 and 255
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*
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* Return value: the alpha channel of the passed color
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*
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* Since: 1.0
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*/
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unsigned char
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cogl_color_get_alpha_byte (const CoglColor *color);
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/**
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* cogl_color_get_red_float:
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* @color: a #CoglColor
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*
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* Retrieves the red channel of @color as a floating point
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* value between 0.0 and 1.0
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*
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* Return value: the red channel of the passed color
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*
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* Since: 1.0
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*/
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float
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cogl_color_get_red_float (const CoglColor *color);
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/**
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* cogl_color_get_green_float:
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* @color: a #CoglColor
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*
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* Retrieves the green channel of @color as a floating point
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* value between 0.0 and 1.0
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*
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* Return value: the green channel of the passed color
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*
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* Since: 1.0
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*/
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float
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cogl_color_get_green_float (const CoglColor *color);
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/**
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* cogl_color_get_blue_float:
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* @color: a #CoglColor
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*
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* Retrieves the blue channel of @color as a floating point
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* value between 0.0 and 1.0
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*
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* Return value: the blue channel of the passed color
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*
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* Since: 1.0
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*/
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float
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cogl_color_get_blue_float (const CoglColor *color);
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/**
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* cogl_color_get_alpha_float:
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* @color: a #CoglColor
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*
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* Retrieves the alpha channel of @color as a floating point
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* value between 0.0 and 1.0
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*
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* Return value: the alpha channel of the passed color
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*
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* Since: 1.0
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*/
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float
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cogl_color_get_alpha_float (const CoglColor *color);
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/**
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* cogl_color_get_red:
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* @color: a #CoglColor
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*
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* Retrieves the red channel of @color as a fixed point
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* value between 0 and 1.0.
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*
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* Return value: the red channel of the passed color
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*
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* Since: 1.0
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*/
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float
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cogl_color_get_red (const CoglColor *color);
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/**
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* cogl_color_get_green:
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* @color: a #CoglColor
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*
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* Retrieves the green channel of @color as a fixed point
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* value between 0 and 1.0.
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*
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* Return value: the green channel of the passed color
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*
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* Since: 1.0
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*/
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float
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cogl_color_get_green (const CoglColor *color);
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/**
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* cogl_color_get_blue:
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* @color: a #CoglColor
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*
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* Retrieves the blue channel of @color as a fixed point
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* value between 0 and 1.0.
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*
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* Return value: the blue channel of the passed color
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*
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* Since: 1.0
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*/
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float
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cogl_color_get_blue (const CoglColor *color);
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/**
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* cogl_color_get_alpha:
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* @color: a #CoglColor
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*
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* Retrieves the alpha channel of @color as a fixed point
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* value between 0 and 1.0.
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*
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* Return value: the alpha channel of the passed color
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*
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* Since: 1.0
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*/
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float
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cogl_color_get_alpha (const CoglColor *color);
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/**
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* cogl_color_set_red_byte:
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* @color: a #CoglColor
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* @red: a byte value between 0 and 255
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*
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* Sets the red channel of @color to @red.
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*
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* Since: 1.4
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*/
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void
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cogl_color_set_red_byte (CoglColor *color,
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unsigned char red);
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/**
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* cogl_color_set_green_byte:
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* @color: a #CoglColor
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* @green: a byte value between 0 and 255
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*
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* Sets the green channel of @color to @green.
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*
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* Since: 1.4
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*/
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void
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cogl_color_set_green_byte (CoglColor *color,
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unsigned char green);
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/**
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* cogl_color_set_blue_byte:
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* @color: a #CoglColor
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* @blue: a byte value between 0 and 255
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*
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* Sets the blue channel of @color to @blue.
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*
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* Since: 1.4
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*/
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void
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cogl_color_set_blue_byte (CoglColor *color,
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unsigned char blue);
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/**
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* cogl_color_set_alpha_byte:
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* @color: a #CoglColor
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* @alpha: a byte value between 0 and 255
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*
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* Sets the alpha channel of @color to @alpha.
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*
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* Since: 1.4
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*/
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void
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cogl_color_set_alpha_byte (CoglColor *color,
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unsigned char alpha);
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/**
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* cogl_color_set_red_float:
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* @color: a #CoglColor
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* @red: a float value between 0.0f and 1.0f
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*
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* Sets the red channel of @color to @red.
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*
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* since: 1.4
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*/
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void
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cogl_color_set_red_float (CoglColor *color,
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float red);
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/**
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* cogl_color_set_green_float:
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* @color: a #CoglColor
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* @green: a float value between 0.0f and 1.0f
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*
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* Sets the green channel of @color to @green.
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*
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* since: 1.4
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*/
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void
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cogl_color_set_green_float (CoglColor *color,
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float green);
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/**
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* cogl_color_set_blue_float:
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* @color: a #CoglColor
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* @blue: a float value between 0.0f and 1.0f
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*
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* Sets the blue channel of @color to @blue.
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*
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* since: 1.4
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*/
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void
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cogl_color_set_blue_float (CoglColor *color,
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float blue);
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/**
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* cogl_color_set_alpha_float:
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* @color: a #CoglColor
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* @alpha: a float value between 0.0f and 1.0f
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*
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* Sets the alpha channel of @color to @alpha.
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*
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* since: 1.4
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*/
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void
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cogl_color_set_alpha_float (CoglColor *color,
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float alpha);
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/**
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* cogl_color_set_red:
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* @color: a #CoglColor
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* @red: a float value between 0.0f and 1.0f
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*
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* Sets the red channel of @color to @red.
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*
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* Since: 1.4
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*/
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void
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cogl_color_set_red (CoglColor *color,
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float red);
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/**
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* cogl_color_set_green:
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* @color: a #CoglColor
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* @green: a float value between 0.0f and 1.0f
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*
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* Sets the green channel of @color to @green.
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*
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* Since: 1.4
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*/
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void
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cogl_color_set_green (CoglColor *color,
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float green);
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/**
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* cogl_color_set_blue:
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* @color: a #CoglColor
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* @blue: a float value between 0.0f and 1.0f
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*
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* Sets the blue channel of @color to @blue.
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*
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* Since: 1.4
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*/
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void
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cogl_color_set_blue (CoglColor *color,
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float blue);
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/**
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* cogl_color_set_alpha:
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* @color: a #CoglColor
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* @alpha: a float value between 0.0f and 1.0f
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*
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* Sets the alpha channel of @color to @alpha.
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*
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* Since: 1.4
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*/
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void
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cogl_color_set_alpha (CoglColor *color,
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float alpha);
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/**
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* cogl_color_premultiply:
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* @color: the color to premultiply
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*
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* Converts a non-premultiplied color to a pre-multiplied color. For
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* example, semi-transparent red is (1.0, 0, 0, 0.5) when non-premultiplied
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* and (0.5, 0, 0, 0.5) when premultiplied.
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*
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* Since: 1.0
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*/
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void
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cogl_color_premultiply (CoglColor *color);
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/**
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* cogl_color_unpremultiply:
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* @color: the color to unpremultiply
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*
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* Converts a pre-multiplied color to a non-premultiplied color. For
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* example, semi-transparent red is (0.5, 0, 0, 0.5) when premultiplied
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* and (1.0, 0, 0, 0.5) when non-premultiplied.
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|
*
|
|
* Since: 1.4
|
|
*/
|
|
void
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|
cogl_color_unpremultiply (CoglColor *color);
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|
|
|
/**
|
|
* cogl_color_equal:
|
|
* @v1: a #CoglColor
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|
* @v2: a #CoglColor
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|
*
|
|
* Compares two #CoglColor<!-- -->s and checks if they are the same.
|
|
*
|
|
* This function can be passed to g_hash_table_new() as the @key_equal_func
|
|
* parameter, when using #CoglColor<!-- -->s as keys in a #GHashTable.
|
|
*
|
|
* Return value: %TRUE if the two colors are the same.
|
|
*
|
|
* Since: 1.0
|
|
*/
|
|
CoglBool
|
|
cogl_color_equal (const void *v1, const void *v2);
|
|
|
|
/**
|
|
* cogl_color_to_hsl:
|
|
* @color: a #CoglColor
|
|
* @hue: (out): return location for the hue value or %NULL
|
|
* @saturation: (out): return location for the saturation value or %NULL
|
|
* @luminance: (out): return location for the luminance value or %NULL
|
|
*
|
|
* Converts @color to the HLS format.
|
|
*
|
|
* The @hue value is in the 0 .. 360 range. The @luminance and
|
|
* @saturation values are in the 0 .. 1 range.
|
|
*
|
|
* Since: 1.16
|
|
*/
|
|
void
|
|
cogl_color_to_hsl (const CoglColor *color,
|
|
float *hue,
|
|
float *saturation,
|
|
float *luminance);
|
|
|
|
/**
|
|
* cogl_color_init_from_hsl:
|
|
* @color: (out): return location for a #CoglColor
|
|
* @hue: hue value, in the 0 .. 360 range
|
|
* @saturation: saturation value, in the 0 .. 1 range
|
|
* @luminance: luminance value, in the 0 .. 1 range
|
|
*
|
|
* Converts a color expressed in HLS (hue, luminance and saturation)
|
|
* values into a #CoglColor.
|
|
*
|
|
* Since: 1.16
|
|
*/
|
|
void
|
|
cogl_color_init_from_hsl (CoglColor *color,
|
|
float hue,
|
|
float saturation,
|
|
float luminance);
|
|
|
|
COGL_END_DECLS
|
|
|
|
#endif /* __COGL_COLOR_H__ */
|