void NXGL_FUNCNAME(nxgl_fillrectangle, NXGLIB_SUFFIX)
(FAR struct lcd_planeinfo_s *pinfo,
FAR const struct nxgl_rect_s *rect,
NXGL_PIXEL_T color)
{
unsigned int ncols;
unsigned int row;
/* Get the dimensions of the rectange to fill in pixels */
ncols = rect->pt2.x - rect->pt1.x + 1;
/* Fill the run buffer with the selected color */
NXGL_FUNCNAME(nxgl_fillrun, NXGLIB_SUFFIX)((NXGLIB_RUNTYPE *)pinfo->buffer, color, ncols);
/* Then fill the rectangle line-by-line */
for (row = rect->pt1.y; row <= rect->pt2.y; row++)
{
/* Draw the raster line at this row */
(void)pinfo->putrun(row, rect->pt1.x, pinfo->buffer, ncols);
}
}
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;
unsigned int ncols;
unsigned int row;
unsigned int xoffset;
#if NXGLIB_BITSPERPIXEL < 8
unsigned int remainder;
#endif
/* Get the dimensions of the rectange to fill: width in pixels,
* height in rows
*/
ncols = dest->pt2.x - dest->pt1.x + 1;
/* Set up to copy the image */
xoffset = dest->pt1.x - origin->x;
sline = (FAR const uint8_t *)src + NXGL_SCALEX(xoffset) + (dest->pt1.y - origin->y) * srcstride;
#if NXGLIB_BITSPERPIXEL < 8
remainder = NXGL_REMAINDERX(xoffset);
#endif
/* Copy the image, one row at a time */
for (row = dest->pt1.y; row <= dest->pt2.y; row++)
{
#if NXGLIB_BITSPERPIXEL < 8
/* if the source pixel is not aligned with a byte boundary, then we will
* need to copy the image data to the run buffer first.
*/
if (remainder != 0)
{
NXGL_FUNCNAME(nxgl_copyrun, NXGLIB_SUFFIX)(sline, pinfo->buffer, remainder, ncols);
(void)pinfo->putrun(row, dest->pt1.x, pinfo->buffer, ncols);
}
else
#endif
{
/* The pixel data is byte aligned. Copy the image data directly from
* the image memory.
*/
(void)pinfo->putrun(row, dest->pt1.x, sline, ncols);
}
/* Then adjust the source pointer to refer to the next line in the source
* image.
*/
sline += srcstride;
}
}
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_PIXEL_T color)
{
unsigned int ncols;
unsigned int topy;
unsigned int boty;
unsigned int row;
unsigned int botw;
b16_t topx1;
b16_t topx2;
b16_t botx1;
b16_t botx2;
b16_t dx1dy;
b16_t dx2dy;
int dy;
int ix1;
int ix2;
/* Get the top run endpoints */
topx1 = trap->top.x1;
topx2 = trap->top.x2;
/* Calculate the number of rows to render */
topy = trap->top.y;
boty = trap->bot.y;
/* Get the bottom run endpoints */
botx1 = trap->bot.x1;
botx2 = trap->bot.x2;
/* Calculate the slope of the left and right side of the trapezoid */
dy = boty - topy;
dx1dy = b16divi((botx1 - topx1), dy);
dx2dy = b16divi((botx2 - topx2), dy);
/* Perform vertical clipping */
if (topy < bounds->pt1.y)
{
/* Is the entire trapezoid "above" the clipping window? */
if (boty < bounds->pt1.y)
{
/* Yes.. then do nothing */
return;
}
/* Calculate the x values for the new top run */
dy = bounds->pt1.y - topy;
topx1 += dy * dx1dy;
topx2 += dy * dx2dy;
/* Clip the top row to render */
topy = bounds->pt1.y;
}
if (boty > bounds->pt2.y)
{
/* Is the entire trapezoid "below" the clipping window? */
if (topy > bounds->pt2.y)
{
/* Yes.. then do nothing */
return;
}
/* Calculate the x values for the new bottom run */
dy = boty - bounds->pt2.y;
botx1 -= dy * dx1dy;
botx2 -= dy * dx2dy;
/* Clip the bottom row to render */
boty = bounds->pt2.y;
}
/* Handle the special case where the sides cross (as in an hourglass) */
if (botx1 > botx2)
{
b16_t tmp;
ngl_swap(botx1, botx2, tmp);
}
/* Fill the run buffer for the maximum run that we will need */
ix1 = b16toi(topx1);
ix1 = ngl_clipl(ix1, bounds->pt1.x);
ix2 = b16toi(topx2);
ix2 = ngl_clipr(ix2, bounds->pt2.x);
ncols = ix2 - ix1 + 1;
ix1 = b16toi(botx1);
ix1 = ngl_clipl(ix1, bounds->pt1.x);
ix2 = b16toi(botx2);
ix2 = ngl_clipr(ix2, bounds->pt2.x);
botw = ix2 - ix1 + 1;
if (ncols < botw)
{
ncols = botw;
}
NXGL_FUNCNAME(nxgl_fillrun,NXGLIB_SUFFIX)((NXGLIB_RUNTYPE*)pinfo->buffer, color, ncols);
/* Then fill the trapezoid row-by-row */
for (row = topy; row <= boty; row++)
{
/* Handle the special case where the sides cross (as in an hourglass) */
if (topx1 > topx2)
{
b16_t tmp;
ngl_swap(topx1, topx2, tmp);
ngl_swap(dx1dy, dx2dy, tmp);
}
/* Convert the positions to integer and get the run width, clipping to
* fit within the bounding box.
*/
ix1 = b16toi(topx1);
ix1 = ngl_clipl(ix1, bounds->pt1.x);
ix2 = b16toi(topx2);
ix2 = ngl_clipr(ix2, bounds->pt2.x);
/* Handle some corner cases where we draw nothing. Otherwise, we will
* always draw at least one pixel.
*/
if (ix1 <= ix2)
{
/* Then draw the run from ix1 to ix2 at row */
ncols = ix2 - ix1 + 1;
(void)pinfo->putrun(row, ix1, pinfo->buffer, ncols);
}
/* Add the dx/dy value to get the run positions on the next row */
topx1 += dx1dy;
topx2 += dx2dy;
}
}
