128 lines
4.6 KiB
C
128 lines
4.6 KiB
C
/****************************************************************************
|
|
* graphics/nxglib/pwfb/pwfb_setpixel.c
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <stdint.h>
|
|
|
|
#include <nuttx/nx/nxglib.h>
|
|
#include <nuttx/nx/nxbe.h>
|
|
|
|
#include "nxglib_bitblit.h"
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
#ifndef NXGLIB_SUFFIX
|
|
# error "NXGLIB_SUFFIX must be defined before including this header file"
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: pwfb_setpixel_*bpp
|
|
*
|
|
* Description:
|
|
* Draw a single pixel in framebuffer memory at the given position and with
|
|
* the given color. This is equivalent to nxgl_fillrectangle_*bpp() with
|
|
* a 1x1 rectangle but is more efficient.
|
|
*
|
|
****************************************************************************/
|
|
|
|
void NXGL_FUNCNAME(pwfb_setpixel, NXGLIB_SUFFIX)
|
|
(
|
|
FAR struct nxbe_window_s *bwnd,
|
|
FAR const struct nxgl_point_s *pos,
|
|
NXGL_PIXEL_T color)
|
|
{
|
|
FAR uint8_t *dest;
|
|
|
|
#if NXGLIB_BITSPERPIXEL < 8
|
|
uint8_t shift;
|
|
uint8_t mask;
|
|
#else
|
|
FAR NXGL_PIXEL_T *pixel;
|
|
#endif
|
|
|
|
/* Get the address of the first byte of the pixel to write */
|
|
|
|
dest = (FAR uint8_t *)bwnd->fbmem + pos->y * bwnd->stride +
|
|
NXGL_SCALEX(pos->x);
|
|
|
|
#if NXGLIB_BITSPERPIXEL < 8
|
|
|
|
/* Shift the color into the proper position */
|
|
|
|
# ifdef CONFIG_NX_PACKEDMSFIRST
|
|
|
|
#if NXGLIB_BITSPERPIXEL == 1
|
|
shift = (7 - (pos->x & 7)); /* Shift is 0, 1, ... 7 */
|
|
mask = (1 << shift); /* Mask is 0x01, 0x02, .. 0x80 */
|
|
color <<= shift; /* Color is positioned under the mask */
|
|
#elif NXGLIB_BITSPERPIXEL == 2
|
|
shift = (6 - ((pos->x & 3) << 1)); /* Shift is 0, 2, 4, or 6 */
|
|
mask = (3 << shift); /* Mask is 0x03, 0x0c, 0x30, or 0xc0 */
|
|
color <<= shift; /* Color is positioned under the mask */
|
|
#elif NXGLIB_BITSPERPIXEL == 4
|
|
shift = (4 - ((pos->x & 1) << 2)); /* Shift is 0 or 4 */
|
|
mask = (15 << shift); /* Mask is 0x0f or 0xf0 */
|
|
color <<= shift; /* Color is positioned under the mask */
|
|
#else
|
|
# error "Unsupported pixel depth"
|
|
#endif
|
|
|
|
# else /* CONFIG_NX_PACKEDMSFIRST */
|
|
|
|
#if NXGLIB_BITSPERPIXEL == 1
|
|
shift = (pos->x & 7); /* Shift is 0, 1, ... 7 */
|
|
mask = (1 << shift); /* Mask is 0x01, 0x02, .. 0x80 */
|
|
color <<= shift; /* Color is positioned under the mask */
|
|
#elif NXGLIB_BITSPERPIXEL == 2
|
|
shift = (pos->x & 3) << 1; /* Shift is 0, 2, 4, or 6 */
|
|
mask = (3 << shift); /* Mask is 0x03, 0x0c, 0x30, or 0xc0 */
|
|
color <<= shift; /* Color is positioned under the mask */
|
|
#elif NXGLIB_BITSPERPIXEL == 4
|
|
shift = (pos->x & 1) << 2; /* Shift is 0 or 4 */
|
|
mask = (15 << shift); /* Mask is 0x0f or 0xf0 */
|
|
color <<= shift; /* Color is positioned under the mask */
|
|
#else
|
|
# error "Unsupported pixel depth"
|
|
#endif
|
|
#endif /* CONFIG_NX_PACKEDMSFIRST */
|
|
|
|
/* Handle masking of the fractional byte */
|
|
|
|
*dest = (*dest & ~mask) | (color & mask);
|
|
#else
|
|
|
|
/* Write the pixel (proper alignment assumed) */
|
|
|
|
pixel = (FAR NXGL_PIXEL_T *)dest;
|
|
*pixel = color;
|
|
#endif
|
|
}
|