152 lines
4.7 KiB
C
152 lines
4.7 KiB
C
/****************************************************************************
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* graphics/nxbe/nxbe_colormap.c
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*
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* Copyright (C) 2008 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/fb.h>
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#include "nxbe.h"
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/****************************************************************************
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* Pre-Processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Types
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****************************************************************************/
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* Public Data
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: nxbe_colormap
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*
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* Description:
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* Set the harware color map to the palette expected by NX
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*
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****************************************************************************/
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#if CONFIG_FB_CMAP
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int nxbe_colormap(FAR struct fb_vtable_s *fb)
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{
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struct fb_cmap_s cmap;
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ubyte *alloc;
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ubyte *red;
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ubyte *green;
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ubyte *blue;
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ubyte rval;
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ubyte gval;
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int size;
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int ndx;
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int ret;
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int i, j, k;
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/* Allocate the color map tables */
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size = 3 * CONFIG_NX_NCOLORS * sizeof(uint16);
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alloc = (ubyte*)malloc(size);
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if (alloc < 0)
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{
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return -ENOMEM;
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}
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memset(alloc, 0xff, size);
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red = alloc;
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green = &alloc[CONFIG_NX_NCOLORS];
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blue = &alloc[2*CONFIG_NX_NCOLORS];
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/* Initialize the color map tables. 6*6*6 = 216, the rest
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* are (0xffff, 0xffff, 0xffff)
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*/
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ndx = 0;
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for (i = 0; i < 6; i++)
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{
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rval = (i * (CONFIG_NX_NCOLORS-1) / 5) << 8;
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for (j = 0; j < 6; j++)
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{
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gval = (j * (CONFIG_NX_NCOLORS-1) / 5) << 8;
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for (k = 0; k < 6; k++)
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{
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red[ndx] = rval;
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green[ndx] = gval;
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blue[ndx] = k * (CONFIG_NX_NCOLORS-1) / 5;
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ndx++;
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}
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}
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}
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/* Now configure the cmap structure */
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cmap.len = CONFIG_NX_NCOLORS;
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cmap.red = red;
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cmap.green = green;
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cmap.blue = blue;
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#ifdef CONFIG_FB_TRANSPARENCY
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cmap.transp = NULL;
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#endif
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/* Then set the color map */
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ret =fb->putcmap(fb, &cmap);
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free(alloc);
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return ret;
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}
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#endif
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