153 lines
4.4 KiB
C
153 lines
4.4 KiB
C
/****************************************************************************
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* graphics/nxglib/fb/nxglib_copyrectangle.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 <nuttx/video/fb.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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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: nxgl_copyrectangle_*bpp
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*
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* Description:
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* Copy a rectangular bitmap image into the specific position in the
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* framebuffer memory.
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*
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****************************************************************************/
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void NXGL_FUNCNAME(nxgl_copyrectangle, NXGLIB_SUFFIX)
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(
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FAR struct fb_planeinfo_s *pinfo,
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FAR const struct nxgl_rect_s *dest,
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FAR const void *src,
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FAR const struct nxgl_point_s *origin,
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unsigned int srcstride)
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{
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FAR const uint8_t *sline;
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FAR uint8_t *dline;
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unsigned int width;
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unsigned int deststride;
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unsigned int rows;
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#if NXGLIB_BITSPERPIXEL < 8
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FAR const uint8_t *sptr;
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FAR uint8_t *dptr;
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uint8_t leadmask;
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uint8_t tailmask;
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uint8_t mask;
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int lnlen;
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#endif
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/* Get the width of the framebuffer in bytes */
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deststride = pinfo->stride;
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/* Get the dimensions of the rectangle to fill: width in pixels,
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* height in rows
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*/
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width = dest->pt2.x - dest->pt1.x + 1;
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rows = dest->pt2.y - dest->pt1.y + 1;
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#if NXGLIB_BITSPERPIXEL < 8
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/* REVISIT: Doesn't the following assume 8 pixels in a byte */
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# ifdef CONFIG_NX_PACKEDMSFIRST
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/* Get the mask for pixels that are ordered so that they pack from the
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* MS byte down.
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*/
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leadmask = (uint8_t)(0xff >> (8 - NXGL_REMAINDERX(dest->pt1.x)));
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tailmask = (uint8_t)(0xff << (8 - NXGL_REMAINDERX(dest->pt2.x - 1)));
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# else
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/* Get the mask for pixels that are ordered so that they pack from the
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* LS byte up.
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*/
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leadmask = (uint8_t)(0xff << (8 - NXGL_REMAINDERX(dest->pt1.x)));
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tailmask = (uint8_t)(0xff >> (8 - NXGL_REMAINDERX(dest->pt1.x - 1)));
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# endif
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#endif
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/* Then copy the image */
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sline = (FAR const uint8_t *)src +
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NXGL_SCALEX(dest->pt1.x - origin->x) +
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(dest->pt1.y - origin->y) * srcstride;
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dline = pinfo->fbmem + dest->pt1.y * deststride +
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NXGL_SCALEX(dest->pt1.x);
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while (rows--)
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{
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#if NXGLIB_BITSPERPIXEL < 8
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/* Handle masking of the fractional initial byte */
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mask = leadmask;
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sptr = sline;
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dptr = dline;
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lnlen = width;
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if (lnlen > 1 && mask)
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{
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dptr[0] = (dptr[0] & ~mask) | (sptr[0] & mask);
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mask = 0xff;
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dptr++;
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sptr++;
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lnlen--; /* REVISIT: Is this correct? */
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}
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/* Handle masking of the fractional final byte */
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mask &= tailmask;
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if (lnlen > 0 && mask)
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{
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dptr[lnlen - 1] = (dptr[lnlen - 1] & ~mask) |
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(sptr[lnlen - 1] & mask);
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lnlen--; /* REVISIT: Is this correct? */
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}
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/* Handle all of the unmasked bytes in-between */
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if (lnlen > 0)
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{
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NXGL_MEMCPY(dptr, sptr, lnlen);
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}
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#else
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/* Copy the whole line */
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NXGL_MEMCPY((NXGL_PIXEL_T *)dline, (NXGL_PIXEL_T *)sline, width);
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#endif
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dline += deststride;
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sline += srcstride;
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}
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}
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