/****************************************************************************
* graphics/nxbe/nxbe_colormap.c
*
* Copyright (C) 2008-2009,2011 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* 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.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <debug.h>
#include "nxbe.h"
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: nxbe_colormap
*
* Description:
* Set the harware color map to the palette expected by NX
*
****************************************************************************/
#if CONFIG_FB_CMAP
int nxbe_colormap(FAR NX_DRIVERTYPE *dev)
{
struct fb_cmap_s cmap;
uint8_t *alloc;
uint8_t *red;
uint8_t *green;
uint8_t *blue;
uint8_t rval;
uint8_t gval;
int size;
int ndx;
int ret;
int i, j, k;
/* Allocate the color map tables in one allocation:
*
* size = 3 colors x CONFIG_NX_COLORS each x 8-bits per color
*/
size = 3 * CONFIG_NX_NCOLORS * sizeof(uint8_t);
alloc = (uint8_t*)malloc(size);
if (alloc == NULL)
{
return -ENOMEM;
}
memset(alloc, 0xff, size);
/* Then get pointers to each color table */
red = alloc;
green = &alloc[CONFIG_NX_NCOLORS];
blue = &alloc[2*CONFIG_NX_NCOLORS];
/* Initialize the color map tables. 6*6*6 = 216, the rest
* are (0xff, 0xfff 0xff)
*/
ndx = 0;
for (i = 0; i < 6; i++)
{
rval = (i * (CONFIG_NX_NCOLORS-1) / 5) << 8;
for (j = 0; j < 6; j++)
{
gval = (j * (CONFIG_NX_NCOLORS-1) / 5) << 8;
for (k = 0; k < 6; k++)
{
red[ndx] = rval;
green[ndx] = gval;
blue[ndx] = k * (CONFIG_NX_NCOLORS-1) / 5;
ndx++;
}
}
}
/* Now configure the cmap structure */
cmap.first = 0;
cmap.len = CONFIG_NX_NCOLORS;
cmap.red = red;
cmap.green = green;
cmap.blue = blue;
#ifdef CONFIG_FB_TRANSPARENCY
cmap.transp = NULL;
#endif
/* Then set the color map */
ret = dev->putcmap(dev, &cmap);
free(alloc);
return ret;
}
#endif
