664927c86e
Fix the minor style issue and remove unnecessary cast Signed-off-by: chao an <anchao@xiaomi.com>
126 lines
3.3 KiB
C
126 lines
3.3 KiB
C
/****************************************************************************
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* graphics/nxbe/nxbe_colormap.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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 <stdint.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/kmalloc.h>
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#include "nxbe.h"
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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 hardware color map to the palette expected by NX
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*
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****************************************************************************/
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#ifdef CONFIG_FB_CMAP
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int nxbe_colormap(FAR NX_DRIVERTYPE *dev)
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{
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struct fb_cmap_s cmap;
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FAR uint8_t *alloc;
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FAR uint8_t *red;
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FAR uint8_t *green;
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FAR uint8_t *blue;
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uint8_t rval;
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uint8_t 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;
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int j;
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int k;
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/* Allocate the color map tables in one allocation:
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*
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* size = 3 colors x CONFIG_NX_COLORS each x 8-bits per color
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*/
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size = 3 * CONFIG_NX_NCOLORS * sizeof(uint8_t);
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alloc = kmm_malloc(size);
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if (alloc == NULL)
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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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/* Then get pointers to each color table */
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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 (0xff, 0xfff 0xff)
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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.first = 0;
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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 = dev->putcmap(dev, &cmap);
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kmm_free(alloc);
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return ret;
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}
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#endif
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