1b2dd815b4
This adds much more comprehensive support for gobject-introspection based bindings by registering all objects as fundamental types that inherit from CoglObject, and all structs as boxed types. Co-Author: Robert Bragg <robert@linux.intel.com> Reviewed-by: Neil Roberts <neil@linux.intel.com>
450 lines
9.1 KiB
C
450 lines
9.1 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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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <string.h>
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#include "cogl-util.h"
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#include "cogl-color.h"
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#include "cogl-fixed.h"
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#include "cogl-color-private.h"
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#include "cogl-gtype-private.h"
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COGL_GTYPE_DEFINE_BOXED (Color, color, cogl_color_copy, cogl_color_free);
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CoglColor *
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cogl_color_new (void)
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{
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return g_slice_new (CoglColor);
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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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if (G_LIKELY (color))
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return g_slice_dup (CoglColor, color);
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return NULL;
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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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if (G_LIKELY (color))
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g_slice_free (CoglColor, color);
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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_RETURN_IF_FAIL (color != NULL);
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color->red = red;
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color->green = green;
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color->blue = blue;
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color->alpha = alpha;
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}
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/* XXX: deprecated, use cogl_color_init_from_4ub */
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void
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cogl_color_set_from_4ub (CoglColor *dest,
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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_4ub (dest, red, green, blue, alpha);
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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_RETURN_IF_FAIL (color != NULL);
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color->red = (red * 255);
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color->green = (green * 255);
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color->blue = (blue * 255);
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color->alpha = (alpha * 255);
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}
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/* XXX: deprecated, use 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_4f (color, red, green, blue, alpha);
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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_RETURN_IF_FAIL (color != NULL);
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color->red = (color_array[0] * 255);
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color->green = (color_array[1] * 255);
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color->blue = (color_array[2] * 255);
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color->alpha = (color_array[3] * 255);
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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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return color->red;
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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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return (float) color->red / 255.0;
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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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return ((float) color->red / 255.0);
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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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return color->green;
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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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return (float) color->green / 255.0;
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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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return ((float) color->green / 255.0);
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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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return color->blue;
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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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return (float) color->blue / 255.0;
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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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return ((float) color->blue / 255.0);
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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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return color->alpha;
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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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return (float) color->alpha / 255.0;
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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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return ((float) color->alpha / 255.0);
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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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color->red = red;
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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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color->red = red * 255.0;
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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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color->red = red * 255.0;
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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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color->green = green;
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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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color->green = green * 255.0;
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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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color->green = green * 255.0;
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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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color->blue = blue;
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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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color->blue = blue * 255.0;
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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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color->blue = blue * 255.0;
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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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color->alpha = alpha;
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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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color->alpha = alpha * 255.0;
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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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color->alpha = alpha * 255.0;
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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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color->red = (color->red * color->alpha + 128) / 255;
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color->green = (color->green * color->alpha + 128) / 255;
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color->blue = (color->blue * color->alpha + 128) / 255;
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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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if (color->alpha != 0)
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{
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color->red = (color->red * 255) / color->alpha;
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color->green = (color->green * 255) / color->alpha;
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color->blue = (color->blue * 255) / color->alpha;
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}
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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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const uint32_t *c1 = v1, *c2 = v2;
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_COGL_RETURN_VAL_IF_FAIL (v1 != NULL, FALSE);
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_COGL_RETURN_VAL_IF_FAIL (v2 != NULL, FALSE);
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/* XXX: We don't compare the padding */
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return *c1 == *c2 ? TRUE : FALSE;
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}
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void
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_cogl_color_get_rgba_4ubv (const CoglColor *color,
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uint8_t *dest)
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{
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memcpy (dest, color, 4);
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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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float red, green, blue;
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float min, max, delta;
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float h, l, s;
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red = color->red / 255.0;
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green = color->green / 255.0;
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blue = color->blue / 255.0;
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if (red > green)
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{
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if (red > blue)
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max = red;
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else
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max = blue;
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if (green < blue)
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min = green;
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else
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min = blue;
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}
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else
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{
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if (green > blue)
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max = green;
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else
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max = blue;
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if (red < blue)
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min = red;
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else
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min = blue;
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}
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l = (max + min) / 2;
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s = 0;
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h = 0;
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if (max != min)
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{
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if (l <= 0.5)
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s = (max - min) / (max + min);
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else
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s = (max - min) / (2.0 - max - min);
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delta = max - min;
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if (red == max)
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h = (green - blue) / delta;
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else if (green == max)
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h = 2.0 + (blue - red) / delta;
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else if (blue == max)
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h = 4.0 + (red - green) / delta;
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h *= 60;
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if (h < 0)
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h += 360.0;
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}
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if (hue)
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*hue = h;
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if (luminance)
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*luminance = l;
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if (saturation)
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*saturation = s;
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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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{
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float tmp1, tmp2;
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float tmp3[3];
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float clr[3];
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int i;
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hue /= 360.0;
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if (saturation == 0)
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{
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cogl_color_init_from_4f (color, luminance, luminance, luminance, 1.0f);
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return;
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}
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if (luminance <= 0.5)
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tmp2 = luminance * (1.0 + saturation);
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else
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tmp2 = luminance + saturation - (luminance * saturation);
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tmp1 = 2.0 * luminance - tmp2;
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tmp3[0] = hue + 1.0 / 3.0;
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tmp3[1] = hue;
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tmp3[2] = hue - 1.0 / 3.0;
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for (i = 0; i < 3; i++)
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{
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if (tmp3[i] < 0)
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tmp3[i] += 1.0;
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if (tmp3[i] > 1)
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tmp3[i] -= 1.0;
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if (6.0 * tmp3[i] < 1.0)
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clr[i] = tmp1 + (tmp2 - tmp1) * tmp3[i] * 6.0;
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else if (2.0 * tmp3[i] < 1.0)
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clr[i] = tmp2;
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else if (3.0 * tmp3[i] < 2.0)
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clr[i] = (tmp1 + (tmp2 - tmp1) * ((2.0 / 3.0) - tmp3[i]) * 6.0);
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else
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clr[i] = tmp1;
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}
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cogl_color_init_from_4f (color, clr[0], clr[1], clr[2], 1.0f);
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}
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