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/****************************************************************************
* apps/graphics/traveler/include/trv_color.h
*
* Copyright (C) 2014 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
#ifndef __APPS_GRAPHICS_TRAVELER_INCLUDE_TRV_COLOR_H
#define __APPS_GRAPHICS_TRAVELER_INCLUDE_TRV_COLOR_H
/****************************************************************************
* Included Files
****************************************************************************/
#include "trv_types.h"
#include "trv_graphics.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#if defined(CONFIG_GRAPHICS_TRAVELER_RGB16_565)
/* This macro creates RGB16 (5:6:5)
*
* R[7:3] -> RGB[15:11]
* G[7:2] -> RGB[10:5]
* B[7:3] -> RGB[4:0]
*/
# define TRV_MKRGB(r,g,b) \
((((uint16_t)(r) << 8) & 0xf800) | (((uint16_t)(g) << 3) & 0x07e0) | (((uint16_t)(b) >> 3) & 0x001f))
/* And these macros perform the inverse transformation */
# define RGB2RED(rgb) (((rgb) >> 8) & 0xf8)
# define RGB2GREEN(rgb) (((rgb) >> 3) & 0xfc)
# define RGB2BLUE(rgb) (((rgb) << 3) & 0xf8)
#elif defined(CONFIG_GRAPHICS_TRAVELER_RGB32_888)
/* This macro creates RGB24 (8:8:8)
*
* R[7:3] -> RGB[15:11]
* G[7:2] -> RGB[10:5]
* B[7:3] -> RGB[4:0]
*/
# define TRV_MKRGB(r,g,b) \
((uint32_t)((r) & 0xff) << 16 | (uint32_t)((g) & 0xff) << 8 | (uint32_t)((b) & 0xff))
/* And these macros perform the inverse transformation */
# define RGB2RED(rgb) (((rgb) >> 16) & 0xff)
# define RGB2GREEN(rgb) (((rgb) >> 8) & 0xff)
# define RGB2BLUE(rgb) ( (rgb) & 0xff)
#else
# error No color format defined
#endif
/****************************************************************************
* Public Types
****************************************************************************/
struct trv_color_rgb_s
{
uint8_t red;
uint8_t green;
uint8_t blue;
};
struct trv_color_lum_s
{
float red;
float green;
float blue;
float luminance;
};
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
void trv_color_allocate(FAR struct trv_palette_s *pinfo);
void trv_color_endmapping(void);
void trv_color_free(FAR struct trv_palette_s *pinfo);
trv_pixel_t trv_color_rgb2pixel(FAR struct trv_color_rgb_s *pixel);
void trv_color_pixel2lum(trv_pixel_t pixel, FAR struct trv_color_lum_s *lum);
trv_pixel_t trv_color_lum2pixel(FAR struct trv_color_lum_s *lum);
#endif /* __APPS_GRAPHICS_TRAVELER_INCLUDE_TRV_COLOR_H */
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