6a3c2aded6
* Simplify EINTR/ECANCEL error handling 1. Add semaphore uninterruptible wait function 2 .Replace semaphore wait loop with a single uninterruptible wait 3. Replace all sem_xxx to nxsem_xxx * Unify the void cast usage 1. Remove void cast for function because many place ignore the returned value witout cast 2. Replace void cast for variable with UNUSED macro
138 lines
5.5 KiB
C
138 lines
5.5 KiB
C
/****************************************************************************
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* graphics/nxglib/lcd/nxglib_setpixel.c
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*
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* Copyright (C) 2011 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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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 <stdint.h>
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#include <nuttx/lcd/lcd.h>
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#include <nuttx/nx/nxglib.h>
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#include "nxglib_bitblit.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#ifndef NXGLIB_SUFFIX
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# error "NXGLIB_SUFFIX must be defined before including this header file"
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#endif
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: nxgl_setpixel_*bpp
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*
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* Description:
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* Draw a single pixel in LCD memory at the given position and with the
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* given color. This is equivalent to nxgl_fillrectangle_*bpp() with a 1x1
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* rectangle but is more efficient.
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*
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****************************************************************************/
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void NXGL_FUNCNAME(nxgl_setpixel, NXGLIB_SUFFIX)
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(FAR struct lcd_planeinfo_s *pinfo,
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FAR const struct nxgl_point_s *pos,
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NXGL_PIXEL_T color)
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{
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#if NXGLIB_BITSPERPIXEL < 8
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uint8_t shift;
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uint8_t mask;
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uint8_t pixel;
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/* Read the byte that contains the pixel to be changed */
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pinfo->getrun(pos->y, pos->x, &pixel, 8 / NXGLIB_BITSPERPIXEL);
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/* Shift the color into the proper position */
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# ifdef CONFIG_NX_PACKEDMSFIRST
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#if NXGLIB_BITSPERPIXEL == 1
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shift = (7 - (pos->x & 7)); /* Shift is 0, 1, ... 7 */
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mask = (1 << shift); /* Mask is 0x01, 0x02, .. 0x80 */
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color <<= shift; /* Color is positioned under the mask */
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#elif NXGLIB_BITSPERPIXEL == 2
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shift = (6 - ((pos->x & 3) << 1)); /* Shift is 0, 2, 4, or 6 */
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mask = (3 << shift); /* Mask is 0x03, 0x0c, 0x30, or 0xc0 */
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color <<= shift; /* Color is positioned under the mask */
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#elif NXGLIB_BITSPERPIXEL == 4
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shift = (4 - ((pos->x & 1) << 2)); /* Shift is 0 or 4 */
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mask = (15 << shift); /* Mask is 0x0f or 0xf0 */
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color <<= shift; /* Color is positioned under the mask */
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#else
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# error "Unsupport pixel depth"
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#endif
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# else /* CONFIG_NX_PACKEDMSFIRST */
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#if NXGLIB_BITSPERPIXEL == 1
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shift = (pos->x & 7); /* Shift is 0, 1, ... 7 */
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mask = (1 << shift); /* Mask is 0x01, 0x02, .. 0x80 */
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color <<= shift; /* Color is positioned under the mask */
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#elif NXGLIB_BITSPERPIXEL == 2
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shift = (pos->x & 3) << 1; /* Shift is 0, 2, 4, or 6 */
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mask = (3 << shift); /* Mask is 0x03, 0x0c, 0x30, or 0xc0 */
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color <<= shift; /* Color is positioned under the mask */
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#elif NXGLIB_BITSPERPIXEL == 4
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shift = (pos->x & 1) << 2; /* Shift is 0 or 4 */
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mask = (15 << shift); /* Mask is 0x0f or 0xf0 */
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color <<= shift; /* Color is positioned under the mask */
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#else
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# error "Unsupport pixel depth"
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#endif
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#endif /* CONFIG_NX_PACKEDMSFIRST */
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/* Handle masking of the fractional byte */
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pixel = (pixel & ~mask) | (color & mask);
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/* Write the modified byte back to graphics memory */
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pinfo->putrun(pos->y, pos->x, (FAR uint8_t *)&pixel, 8 / NXGLIB_BITSPERPIXEL);
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#else
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/* Draw a single pixel at this position raster line at this row */
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pinfo->putrun(pos->y, pos->x, (FAR uint8_t *)&color, 1);
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#endif
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}
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