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601 lines
14 KiB
C
601 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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#include <glib-object.h>
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COGL_BEGIN_DECLS
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/**
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* cogl_color_get_gtype:
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*
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* Returns: a #GType that can be used with the GLib type system.
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*/
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GType cogl_color_get_gtype (void);
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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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*
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* Since: 1.4
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*/
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void
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cogl_color_unpremultiply (CoglColor *color);
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/**
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* cogl_color_equal:
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* @v1: a #CoglColor
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* @v2: a #CoglColor
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*
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* Compares two #CoglColor<!-- -->s and checks if they are the same.
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*
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* This function can be passed to g_hash_table_new() as the @key_equal_func
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* parameter, when using #CoglColor<!-- -->s as keys in a #GHashTable.
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*
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* Return value: %TRUE if the two colors are the same.
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*
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* Since: 1.0
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*/
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CoglBool
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cogl_color_equal (const void *v1, const void *v2);
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/**
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* cogl_color_to_hsl:
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* @color: a #CoglColor
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* @hue: (out): return location for the hue value or %NULL
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* @saturation: (out): return location for the saturation value or %NULL
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* @luminance: (out): return location for the luminance value or %NULL
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*
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* Converts @color to the HLS format.
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*
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* The @hue value is in the 0 .. 360 range. The @luminance and
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* @saturation values are in the 0 .. 1 range.
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*
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* Since: 1.16
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*/
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void
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cogl_color_to_hsl (const CoglColor *color,
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float *hue,
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float *saturation,
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float *luminance);
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/**
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* cogl_color_init_from_hsl:
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* @color: (out): return location for a #CoglColor
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* @hue: hue value, in the 0 .. 360 range
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* @saturation: saturation value, in the 0 .. 1 range
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* @luminance: luminance value, in the 0 .. 1 range
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*
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* Converts a color expressed in HLS (hue, luminance and saturation)
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* values into a #CoglColor.
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*
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* Since: 1.16
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*/
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void
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cogl_color_init_from_hsl (CoglColor *color,
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float hue,
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float saturation,
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float luminance);
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COGL_END_DECLS
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#endif /* __COGL_COLOR_H__ */
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