240 lines
7.3 KiB
C
240 lines
7.3 KiB
C
/****************************************************************************
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* graphics/nxglib/fb/pwfb_moverectangle.c
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*
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* Copyright (C) 2019 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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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/nx/nxglib.h>
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#include <nuttx/nx/nxbe.h>
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#include "nxglib_bitblit.h"
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: pwfb_lowresmemcpy
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****************************************************************************/
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#if NXGLIB_BITSPERPIXEL < 8
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static inline void pwfb_lowresmemcpy(FAR uint8_t *dline,
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FAR const uint8_t *sline,
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unsigned int width, uint8_t leadmask,
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uint8_t tailmask)
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{
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FAR const uint8_t *sptr;
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FAR uint8_t *dptr;
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uint8_t mask;
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int lnlen;
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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--;
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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) | (sptr[lnlen-1] & mask);
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lnlen--;
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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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}
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#endif
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: pwfb_moverectangle_*bpp
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*
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* Description:
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* Move a rectangular region from location to another in the
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* framebuffer memory. The source is expressed as a rectangle; the
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* destination position is expressed as a point corresponding to the
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* translation of the upper, left-hand corner.
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*
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****************************************************************************/
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void NXGL_FUNCNAME(pwfb_moverectangle,NXGLIB_SUFFIX)
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(FAR struct nxbe_window_s *bwnd, FAR const struct nxgl_rect_s *rect,
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FAR struct nxgl_point_s *offset)
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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 stride;
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unsigned int rows;
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#if NXGLIB_BITSPERPIXEL < 8
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uint8_t leadmask;
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uint8_t tailmask;
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#endif
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/* Get the width of the framebuffer in bytes */
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stride = bwnd->stride;
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/* Get the dimensions of the rectange to fill: width in pixels, height
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* in rows
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*/
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width = rect->pt2.x - rect->pt1.x + 1;
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rows = rect->pt2.y - rect->pt1.y + 1;
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#if NXGLIB_BITSPERPIXEL < 8
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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(rect->pt1.x)));
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tailmask = (uint8_t)(0xff << (8 - NXGL_REMAINDERX(rect->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(rect->pt1.x)));
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tailmask = (uint8_t)(0xff >> (8 - NXGL_REMAINDERX(rect->pt1.x-1)));
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# endif
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#endif
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/* sline = address of the first pixel in the top row of the source in
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* framebuffer memory
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*/
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sline = (FAR uint8_t *)bwnd->fbmem + rect->pt1.y * stride +
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NXGL_SCALEX(rect->pt1.x);
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/* dline = address of the first pixel in the top row of the destination
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* in framebuffer memory. We get dline by subtract the offset from the
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* source position.
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*/
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dline = (FAR uint8_t *)bwnd->fbmem + offset->y * stride +
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NXGL_SCALEX(offset->x);
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/* Case 1: Is the destination position above the displayed position?
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* If the destination position is less then then the src address, then the
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* destination is offset to a position below (and or to the left) of the
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* source in framebuffer memory.
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*/
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if (offset->y < rect->pt1.y ||
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(offset->y < rect->pt1.y && offset->x <= rect->pt1.x))
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{
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/* Yes.. Copy the rectangle from top down (i.e., adding the stride
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* to move to the next, lower row) */
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while (rows--)
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{
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/* Copy the row */
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#if NXGLIB_BITSPERPIXEL < 8
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pwfb_lowresmemcpy(dline, sline, width, leadmask, tailmask);
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#else
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NXGL_MEMCPY(dline, sline, width);
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#endif
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/* Point to the next source/dest row below the current one */
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dline += stride;
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sline += stride;
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}
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}
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/* Case 2: No.. the destination position is above (or to the left of)
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* the displayed source position
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*/
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else
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{
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/* Adjust sline and dline to point to the bottom row (+1) of the
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* source and destination rectangles in framebuffer memory.
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*/
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unsigned int hoffset = rows * stride;
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sline += hoffset;
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dline += hoffset;
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/* Copy the rectangle from the bottom up (i.e., subtracting stride
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* to re-position to the previous, higher row)
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*/
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while (rows--)
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{
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/* Point to the next source/dest row above the current one */
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dline -= stride;
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sline -= stride;
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/* Copy the row */
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#if NXGLIB_BITSPERPIXEL < 8
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pwfb_lowresmemcpy(dline, sline, width, leadmask, tailmask);
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#else
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NXGL_MEMCPY(dline, sline, width);
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#endif
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}
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}
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}
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