nuttx/graphics/nxglib/fb/nxglib_fillrectangle.c

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/****************************************************************************
* graphics/nxglib/fb/nxglib_fillrectangle.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/video/fb.h>
#include <nuttx/nx/nxglib.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: nxgl_fillrectangle_*bpp
*
* Description:
* Fill a rectangle region in the framebuffer memory with a fixed color
*
****************************************************************************/
void NXGL_FUNCNAME(nxgl_fillrectangle, NXGLIB_SUFFIX)
(
FAR struct fb_planeinfo_s *pinfo,
FAR const struct nxgl_rect_s *rect,
NXGL_PIXEL_T color)
{
FAR uint8_t *line;
unsigned int width;
unsigned int stride;
int rows;
#if NXGLIB_BITSPERPIXEL < 8
FAR uint8_t *dest;
uint8_t mpixel = NXGL_MULTIPIXEL(color);
uint8_t leadmask;
uint8_t tailmask;
uint8_t mask;
int lnlen;
#endif
/* Get the width of the framebuffer in bytes */
stride = pinfo->stride;
/* Get the dimensions of the rectangle to fill in pixels */
width = rect->pt2.x - rect->pt1.x + 1;
rows = rect->pt2.y - rect->pt1.y + 1;
/* Get the address of the first byte in the first line to write */
line = pinfo->fbmem + rect->pt1.y * stride + NXGL_SCALEX(rect->pt1.x);
#if NXGLIB_BITSPERPIXEL < 8
# ifdef CONFIG_NX_PACKEDMSFIRST
/* Get the mask for pixels that are ordered so that they pack from the
* MS byte down.
*/
leadmask = (uint8_t)(0xff >> (8 - NXGL_REMAINDERX(rect->pt1.x)));
tailmask = (uint8_t)(0xff << (8 - NXGL_REMAINDERX(rect->pt2.x - 1)));
# else
/* Get the mask for pixels that are ordered so that they pack from the
* LS byte up.
*/
leadmask = (uint8_t)(0xff << (8 - NXGL_REMAINDERX(rect->pt1.x)));
tailmask = (uint8_t)(0xff >> (8 - NXGL_REMAINDERX(rect->pt1.x - 1)));
# endif
#endif
/* Then fill the rectangle line-by-line */
while (rows-- > 0)
{
#if NXGLIB_BITSPERPIXEL < 8
/* Handle masking of the fractional initial byte */
mask = leadmask;
dest = line;
lnlen = width;
if (lnlen > 1 && mask)
{
dest[0] = (dest[0] & ~mask) | (mpixel & mask);
mask = 0xff;
dest++;
lnlen--;
}
/* Handle masking of the fractional final byte */
mask &= tailmask;
if (lnlen > 0 && mask)
{
dest[lnlen - 1] = (dest[lnlen - 1] & ~mask) | (mpixel & mask);
lnlen--;
}
/* Handle all of the unmasked bytes in-between */
if (lnlen > 0)
{
NXGL_MEMSET(dest, (NXGL_PIXEL_T)color, lnlen);
}
#else
/* Draw the entire raster line */
NXGL_MEMSET(line, (NXGL_PIXEL_T)color, width);
#endif
line += stride;
}
}