diff options
Diffstat (limited to 'nuttx/graphics/nxglib/fb/nxglib_moverectangle.c')
-rw-r--r-- | nuttx/graphics/nxglib/fb/nxglib_moverectangle.c | 252 |
1 files changed, 252 insertions, 0 deletions
diff --git a/nuttx/graphics/nxglib/fb/nxglib_moverectangle.c b/nuttx/graphics/nxglib/fb/nxglib_moverectangle.c new file mode 100644 index 000000000..d8e52250c --- /dev/null +++ b/nuttx/graphics/nxglib/fb/nxglib_moverectangle.c @@ -0,0 +1,252 @@ +/**************************************************************************** + * graphics/nxglib/fb/nxglib_moverectangle.c + * + * Copyright (C) 2008-2012 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_moverectangle_*bpp + * + * Descripton: + * Move a rectangular region from location to another in the + * framebuffer memory. The source is expressed as a rectangle; the + * destination position is expressed as a point corresponding to the + * translation of the upper, left-hand corner. + * + ****************************************************************************/ + +void NXGL_FUNCNAME(nxgl_moverectangle,NXGLIB_SUFFIX) +(FAR struct fb_planeinfo_s *pinfo, FAR const struct nxgl_rect_s *rect, + FAR struct nxgl_point_s *offset) +{ + FAR const uint8_t *sline; + FAR uint8_t *dline; + unsigned int width; + unsigned int stride; + unsigned int rows; + +#if NXGLIB_BITSPERPIXEL < 8 + uint8_t leadmask; + uint8_t tailmask; +#endif + + /* Get the width of the framebuffer in bytes */ + + stride = pinfo->stride; + + /* Get the dimensions of the rectange to fill: 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 * stride + NXGL_SCALEX(rect->pt1.x); + + /* dline = address of the first pixel in the top row of the destination + * in framebuffer memory. We get dline by subtract the offset from the + * source position. + */ + + dline = pinfo->fbmem + offset->y * stride + NXGL_SCALEX(offset->x); + + /* Case 1: Is the destination position above the displayed position? + * If the destination position is less then then the src address, then the + * destination is offset to a postion below (and or to the left) of the + * source in framebuffer memory. + */ + + if (offset->y < rect->pt1.y || + (offset->y < rect->pt1.y && offset->x <= rect->pt1.x)) + { + /* Yes.. Copy the rectangle from top down (i.e., adding the stride + * to move to the next, lower row) */ + + 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 += stride; + sline += stride; + } + } + + /* Case 2: No.. the destination position is above (or to the left of) + * the displayed source position + */ + + else + { + /* Adjust sline and dline to point to the bottom row (+1) of the + * source and destination rectangles in framebuffer memory. + */ + + unsigned int hoffset = rows * stride; + sline += hoffset; + dline += hoffset; + + /* Copy the rectangle from the bottom up (i.e., subtracting stride + * to re-position to the previous, higher row) + */ + + while (rows--) + { + /* Point to the next source/dest row above the current one */ + + dline -= stride; + sline -= stride; + + /* Copy the row */ + +#if NXGLIB_BITSPERPIXEL < 8 + nxgl_lowresmemcpy(dline, sline, width, leadmask, tailmask); +#else + NXGL_MEMCPY(dline, sline, width); +#endif + } + } +} |