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- /****************************************************************************
- * graphics/nxglib/fb/nxsglib_copyrectangle.c
- *
- * Copyright (C) 2008-2011 Gregory Nutt. All rights reserved.
- * Author: Gregory Nutt <gnutt@nuttx.org>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * 3. Neither the name NuttX nor the names of its contributors may be
- * used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- ****************************************************************************/
- /****************************************************************************
- * Included Files
- ****************************************************************************/
- #include <nuttx/config.h>
- #include <stdint.h>
- #include <nuttx/video/fb.h>
- #include <nuttx/nx/nxglib.h>
- #include "nxglib_bitblit.h"
- /****************************************************************************
- * Public Functions
- ****************************************************************************/
- /****************************************************************************
- * Name: nxgl_copyrectangle_*bpp
- *
- * Descripton:
- * Copy a rectangular bitmap image into the specific position in the
- * framebuffer memory.
- *
- ****************************************************************************/
- void NXGL_FUNCNAME(nxgl_copyrectangle, NXGLIB_SUFFIX)
- (FAR struct fb_planeinfo_s *pinfo, FAR const struct nxgl_rect_s *dest,
- FAR const void *src, FAR const struct nxgl_point_s *origin,
- unsigned int srcstride)
- {
- FAR const uint8_t *sline;
- FAR uint8_t *dline;
- unsigned int width;
- unsigned int deststride;
- unsigned int rows;
- #if NXGLIB_BITSPERPIXEL < 8
- FAR const uint8_t *sptr;
- FAR uint8_t *dptr;
- uint8_t leadmask;
- uint8_t tailmask;
- uint8_t mask;
- int lnlen;
- #endif
- /* Get the width of the framebuffer in bytes */
- deststride = pinfo->stride;
- /* Get the dimensions of the rectange to fill: width in pixels,
- * height in rows
- */
- width = dest->pt2.x - dest->pt1.x + 1;
- rows = dest->pt2.y - dest->pt1.y + 1;
- #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(dest->pt1.x)));
- tailmask = (uint8_t)(0xff << (8 - NXGL_REMAINDERX(dest->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(dest->pt1.x)));
- tailmask = (uint8_t)(0xff >> (8 - NXGL_REMAINDERX(dest->pt1.x-1)));
- # endif
- #endif
- /* Then copy the image */
- sline = (FAR const uint8_t *)src + NXGL_SCALEX(dest->pt1.x - origin->x) + (dest->pt1.y - origin->y) * srcstride;
- dline = pinfo->fbmem + dest->pt1.y * deststride + NXGL_SCALEX(dest->pt1.x);
- while (rows--)
- {
- #if NXGLIB_BITSPERPIXEL < 8
- /* Handle masking of the fractional initial byte */
- mask = leadmask;
- sptr = sline;
- dptr = dline;
- lnlen = width;
- if (lnlen > 1 && mask)
- {
- dptr[0] = (dptr[0] & ~mask) | (sptr[0] & mask);
- mask = 0xff;
- dptr++;
- sptr++;
- lnlen--;
- }
- /* Handle masking of the fractional final byte */
- mask &= tailmask;
- if (lnlen > 0 && mask)
- {
- dptr[lnlen-1] = (dptr[lnlen-1] & ~mask) | (sptr[lnlen-1] & mask);
- lnlen--;
- }
- /* Handle all of the unmasked bytes in-between */
- if (lnlen > 0)
- {
- NXGL_MEMCPY(dptr, sptr, lnlen);
- }
- #else
- /* Copy the whole line */
- NXGL_MEMCPY((NXGL_PIXEL_T *)dline, (NXGL_PIXEL_T *)sline, width);
- #endif
- dline += deststride;
- sline += srcstride;
- }
- }
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