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Framework for LCD rasterizers 

git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@2598 7fd9a85b-ad96-42d3-883c-3090e2eb8679
This commit is contained in:
patacongo 2010-04-17 03:52:05 +00:00
parent a7298e2392
commit 8107fd353f
5 changed files with 763 additions and 5 deletions
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10
nuttx/graphics/nxbe/nxbe.h
View File

@ -84,17 +84,17 @@ struct nxbe_plane_s
{
/* Raster operation callbacks for this bits-per-pixel value */
void (*fillrectangle)(FAR struct fb_planeinfo_s *pinfo,
void (*fillrectangle)(FAR NX_PLANEINFOTYPE *pinfo,
FAR const struct nxgl_rect_s *rect,
nxgl_mxpixel_t color);
void (*filltrapezoid)(FAR struct fb_planeinfo_s *pinfo,
void (*filltrapezoid)(FAR NX_PLANEINFOTYPE *pinfo,
FAR const struct nxgl_trapezoid_s *trap,
FAR const struct nxgl_rect_s *bounds,
nxgl_mxpixel_t color);
void (*moverectangle)(FAR struct fb_planeinfo_s *pinfo,
void (*moverectangle)(FAR NX_PLANEINFOTYPE *pinfo,
FAR const struct nxgl_rect_s *rect,
FAR struct nxgl_point_s *offset);
void (*copyrectangle)(FAR struct fb_planeinfo_s *pinfo,
void (*copyrectangle)(FAR NX_PLANEINFOTYPE *pinfo,
FAR const struct nxgl_rect_s *dest,
FAR const void *src,
FAR const struct nxgl_point_s *origin,
@ -102,7 +102,7 @@ struct nxbe_plane_s
/* Framebuffer plane info describing destination video plane */
struct fb_planeinfo_s pinfo;
NX_PLANEINFOTYPE pinfo;
};
/* Clipping *****************************************************************/

179
nuttx/graphics/nxglib/lcd/nxglib_copyrectangle.c Executable file
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@ -0,0 +1,179 @@
/****************************************************************************
* graphics/nxglib/lcd`/nxsglib_copyrectangle.c
*
* Copyright (C) 2010 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* 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/lcd.h>
#include <nuttx/nxglib.h>
#include "nxglib_bitblit.h"
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* 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 lcd_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 = (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;
}
}

116
nuttx/graphics/nxglib/lcd/nxglib_fillrectangle.c Executable file
View File

@ -0,0 +1,116 @@
/****************************************************************************
* graphics/nxglib/lcd/nxglib_fillrectangle.c
*
* Copyright (C) 2010 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* 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/lcd.h>
#include <nuttx/nxglib.h>
#include "nxglib_bitblit.h"
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
#ifndef NXGLIB_SUFFIX
# error "NXGLIB_SUFFIX must be defined before including this header file"
#endif
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: nxgl_fillrectangle_*bpp
*
* Descripton:
* Fill a rectangle region in the framebuffer memory with a fixed color
*
****************************************************************************/
void NXGL_FUNCNAME(nxgl_fillrectangle,NXGLIB_SUFFIX)
(FAR struct lcd_planeinfo_s *pinfo, FAR const struct nxgl_rect_s *rect, nxgl_mxpixel_t color)
{
unsigned int ncols;
unsigned int nrows;
unsigned int row;
unsigned int col;
/* Get the dimensions of the rectange to fill in pixels */
ncols = rect->pt2.x - rect->pt1.x + 1;
nrows = rect->pt2.y - rect->pt1.y + 1;
/* Fill the run buffer with the selected color */
for (col = 0; col < ncols; col++)
{
#if NXGLIB_BITSPERPIXEL < 8
#elif
g_runbuffer
#endif
}
/* Then fill the rectangle line-by-line */
for (row = 0; row < nrows; row++)
{
/* Draw the entire raster line */
(void)pinfo->putrun(row, rect->pt2.x, g_runbuffer, ncols);
}
}

251
nuttx/graphics/nxglib/lcd/nxglib_filltrapezoid.c Executable file
View File

@ -0,0 +1,251 @@
/****************************************************************************
* graphics/nxglib/lcd/nxglib_filltrapezoid.c
*
* Copyright (C) 2010 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* 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 <fixedmath.h>
#include <nuttx/lcd.h>
#include <nuttx/nxglib.h>
#include "nxglib_bitblit.h"
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
#ifndef NXGLIB_SUFFIX
# error "NXGLIB_SUFFIX must be defined before including this header file"
#endif
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: nxglib_filltrapezoid_*bpp
*
* Descripton:
* Fill a trapezoidal region in the framebuffer memory with a fixed color.
* Clip the trapezoid to lie within a boundng box. This is useful for
* drawing complex shapes that can be broken into a set of trapezoids.
*
****************************************************************************/
void NXGL_FUNCNAME(nxgl_filltrapezoid,NXGLIB_SUFFIX)(
FAR struct lcd_planeinfo_s *pinfo,
FAR const struct nxgl_trapezoid_s *trap,
FAR const struct nxgl_rect_s *bounds,
nxgl_mxpixel_t color)
{
unsigned int stride;
unsigned int width;
FAR uint8_t *line;
int nrows;
b16_t x1;
b16_t x2;
nxgl_coord_t y1;
nxgl_coord_t y2;
b16_t dx1dy;
b16_t dx2dy;
#if NXGLIB_BITSPERPIXEL < 8
FAR uint8_t *dest;
uint8_t mpixel = NXGL_MULTIPIXEL(color);
uint8_t mask;
int lnlen;
#endif
/* Get the width of the framebuffer in bytes */
stride = pinfo->stride;
/* Get the top run position and the number of rows to draw */
x1 = trap->top.x1;
x2 = trap->top.x2;
/* Calculate the number of rows to render */
y1 = trap->top.y;
y2 = trap->bot.y;
nrows = y2 - y1 + 1;
/* Calculate the slope of the left and right side of the trapezoid */
dx1dy = b16divi((trap->bot.x1 - x1), nrows - 1);
dx2dy = b16divi((trap->bot.x2 - x2), nrows - 1);
/* Perform vertical clipping */
if (y1 < bounds->pt1.y)
{
/* Calculate the x values for the new top run */
int dy = bounds->pt1.y - y1;
x1 += dy * dx1dy;
x2 += dy * dx2dy;
/* Clip and re-calculate the number of rows to render */
y1 = bounds->pt1.y;
nrows = y2 - y1 + 1;
}
if (y2 > bounds->pt2.y)
{
/* Clip and re-calculate the number of rows to render */
y2 = bounds->pt2.y;
nrows = y2 - y1 + 1;
}
/* Get the address of the first byte on the first line */
line = pinfo->fbmem + y1 * stride ;
/* Then fill the trapezoid line-by-line */
while (nrows--)
{
int ix1;
int ix2;
/* Handle the special case where the sides cross (as in an hourglass) */
if (x1 > x2)
{
b16_t tmp;
ngl_swap(x1, x2, tmp);
ngl_swap(dx1dy, dx2dy, tmp);
}
/* Convert the positions to integer and get the run width */
ix1 = b16toi(x1);
ix2 = b16toi(x2);
width = ix2 - ix1 + 1;
/* Handle some corner cases where we draw nothing. Otherwise, we will
* always draw at least one pixel.
*/
if (x1 > x2 || ix2 < bounds->pt1.x || ix1 > bounds->pt2.x)
{
/* Get a clipped copies of the starting and ending X positions. This
* clipped truncates "down" and gives the quantized pixel holding the
* fractional X position
*/
ix1 = ngl_clipl(ix1, bounds->pt1.x);
ix2 = ngl_clipr(ix2, bounds->pt2.x);
#if NXGLIB_BITSPERPIXEL < 8
/* Handle masking of the fractional initial byte */
#ifdef CONFIG_NX_PACKEDMSFIRST
mask = (uint8_t)(0xff >> (8 - NXGL_REMAINDERX(ix1));
#else
mask = (uint8_t)(0xff << (8 - NXGL_REMAINDERX(ix1)));
#endif
dest = line;
lnlen = width;
if (lnlen > 1 && mask)
{
dest[0] = (dest[0] & ~mask) | (mpixel & mask);
mask = 0xff;
dest++;
lnlen--;
}
/* Handle masking of the fractional final byte */
#ifdef CONFIG_NX_PACKEDMSFIRST
mask &= (uint8_t)(0xff << (8 - NXGL_REMAINDERX(ix2)));
#else
mask &= (uint8_t)(0xff >> (8 - NXGL_REMAINDERX(ix2)));
#endif
if (lnlen > 0 && mask)
{
dest[lnlen-1] = (dest[lnlen-1] & ~mask) | (mpixel & mask);
lnlen--;
}
/* Handle all of the unmasked bytes in-between */
if (lnlen > 0)
{
NXGL_MEMSET(dest, (NXGL_PIXEL_T)color, lnlen);
}
#else
/* Then draw the run from (line + ix1) to (line + ix2) */
NXGL_MEMSET(line + NXGL_SCALEX(ix1), (NXGL_PIXEL_T)color, width);
#endif
}
/* Move to the start of the next line */
line += stride;
/* Add the dx/dy value to get the run positions on the next row */
x1 += dx1dy;
x2 += dx2dy;
}
}

212
nuttx/graphics/nxglib/lcd/nxglib_moverectangle.c Executable file
View File

@ -0,0 +1,212 @@
/****************************************************************************
* graphics/nxglib/lcd/nxglib_moverectangle.c
*
* Copyright (C) 2010 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* 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/lcd.h>
#include <nuttx/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.
*
****************************************************************************/
void NXGL_FUNCNAME(nxgl_moverectangle,NXGLIB_SUFFIX)
(FAR struct lcd_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
/* Case 1: The starting position is above the display */
if (offset->y < 0)
{
dline = pinfo->fbmem + rect->pt1.y * stride + NXGL_SCALEX(rect->pt1.x);
sline = dline - offset->y * stride - NXGL_SCALEX(offset->x);
while (rows--)
{
#if NXGLIB_BITSPERPIXEL < 8
nxgl_lowresmemcpy(dline, sline, width, leadmask, tailmask);
#else
NXGL_MEMCPY(dline, sline, width);
#endif
dline += stride;
sline += stride;
}
}
/* Case 2: It's not */
else
{
dline = pinfo->fbmem + rect->pt2.y * stride + NXGL_SCALEX(rect->pt1.x);
sline = dline - offset->y * stride - NXGL_SCALEX(offset->x);
while (rows--)
{
dline -= stride;
sline -= stride;
#if NXGLIB_BITSPERPIXEL < 8
nxgl_lowresmemcpy(dline, sline, width, leadmask, tailmask);
#else
NXGL_MEMCPY(dline, sline, width);
#endif
}
}
}