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- /****************************************************************************
- * graphics/nxglib/fb/nxglib_getrectangle.c
- *
- * Copyright (C) 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/fb.h>
- #include <nuttx/nx/nxglib.h>
- #include "nxglib_bitblit.h"
- /****************************************************************************
- * Pre-Processor Definitions
- ****************************************************************************/
- /****************************************************************************
- * Private Types
- ****************************************************************************/
- /****************************************************************************
- * Private Data
- ****************************************************************************/
- /****************************************************************************
- * Public Data
- ****************************************************************************/
- /****************************************************************************
- * Private Functions
- ****************************************************************************/
- /****************************************************************************
- * Name: nxgl_lowresmemcpy
- ****************************************************************************/
- #if NXGLIB_BITSPERPIXEL < 8
- static inline void nxgl_lowresmemcpy(FAR uint8_t *dline, FAR const uint8_t *sline,
- unsigned int width,
- uint8_t leadmask, uint8_t tailmask)
- {
- FAR const uint8_t *sptr;
- FAR uint8_t *dptr;
- uint8_t mask;
- int lnlen;
- /* 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);
- }
- }
- #endif
- /****************************************************************************
- * Public Functions
- ****************************************************************************/
- /****************************************************************************
- * Name: nxgl_getrectangle_*bpp
- *
- * Descripton:
- * Fetch a rectangular region from framebuffer memory. The source is
- * expressed as a rectangle.
- *
- ****************************************************************************/
- void NXGL_FUNCNAME(nxgl_getrectangle,NXGLIB_SUFFIX)
- (FAR struct fb_planeinfo_s *pinfo, FAR const struct nxgl_rect_s *rect,
- FAR void *dest, unsigned int deststride)
- {
- FAR const uint8_t *sline;
- FAR uint8_t *dline;
- unsigned int width;
- unsigned int fbstride;
- unsigned int rows;
- #if NXGLIB_BITSPERPIXEL < 8
- uint8_t leadmask;
- uint8_t tailmask;
- #endif
- /* Get the width of the framebuffer in bytes */
- fbstride = pinfo->stride;
- /* Get the dimensions of the rectange to copy: width in pixels, height
- * in rows
- */
- width = rect->pt2.x - rect->pt1.x + 1;
- rows = rect->pt2.y - rect->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(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
- /* sline = address of the first pixel in the top row of the source in
- * framebuffer memory
- */
- sline = pinfo->fbmem + rect->pt1.y * fbstride + NXGL_SCALEX(rect->pt1.x);
- /* dline = address of the first row pixel */
- dline = (FAR uint8_t *)dest;
- /* Yes.. Copy the rectangle */
- while (rows--)
- {
- /* Copy the row */
- #if NXGLIB_BITSPERPIXEL < 8
- nxgl_lowresmemcpy(dline, sline, width, leadmask, tailmask);
- #else
- NXGL_MEMCPY(dline, sline, width);
- #endif
- /* Point to the next source/dest row below the current one */
- dline += deststride;
- sline += fbstride;
- }
- }
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