void NXGL_FUNCNAME(nxgl_fillrectangle,NXGLIB_SUFFIX) (FAR struct fb_planeinfo_s *pinfo, FAR const struct nxgl_rect_s *rect, NXGL_PIXEL_T color) { FAR uint8_t *line; unsigned int width; unsigned int stride; int rows; #if NXGLIB_BITSPERPIXEL < 8 FAR uint8_t *dest; uint8_t mpixel = NXGL_MULTIPIXEL(color); uint8_t leadmask; uint8_t tailmask; uint8_t mask; int lnlen; #endif /* Get the width of the framebuffer in bytes */ stride = pinfo->stride; /* Get the dimensions of the rectange to fill in pixels */ width = rect->pt2.x - rect->pt1.x + 1; rows = rect->pt2.y - rect->pt1.y + 1; /* Get the address of the first byte in the first line to write */ line = pinfo->fbmem + rect->pt1.y * stride + NXGL_SCALEX(rect->pt1.x); #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 /* Then fill the rectangle line-by-line */ while (rows-- > 0) { #if NXGLIB_BITSPERPIXEL < 8 /* Handle masking of the fractional initial byte */ mask = leadmask; 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 */ mask &= tailmask; 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 /* Draw the entire raster line */ NXGL_MEMSET(line, (NXGL_PIXEL_T)color, width); #endif line += stride; } }
void NXGL_FUNCNAME(nxgl_filltrapezoid,NXGLIB_SUFFIX)( FAR struct fb_planeinfo_s *pinfo, FAR const struct nxgl_trapezoid_s *trap, FAR const struct nxgl_rect_s *bounds, NXGL_PIXEL_T color) { unsigned int stride; unsigned int width; FAR uint8_t *dest; 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 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 */ if (nrows > 1) { dx1dy = b16divi((trap->bot.x1 - x1), nrows - 1); dx2dy = b16divi((trap->bot.x2 - x2), nrows - 1); } else { /* The trapezoid is a run! Use the average width. */ x1 = (x1 + trap->bot.x1) >> 1; x2 = (x2 + trap->bot.x2) >> 1; dx1dy = 0; dx2dy = 0; } /* Perform vertical clipping */ if (y1 < bounds->pt1.y) { /* Is the entire trapezoid "above" the clipping window? */ if (y2 < bounds->pt1.y) { /* Yes.. then do nothing */ return; } /* 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) { /* Is the entire trapezoid "below" the clipping window? */ if (y1 > bounds->pt2.y) { /* Yes.. then do nothing */ return; } /* 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 */ ix1 = b16toi(x1); ix2 = b16toi(x2); /* 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); /* Get the run length for the clipped row */ width = ix2 - ix1 + 1; #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) */ dest = line + NXGL_SCALEX(ix1); NXGL_MEMSET(dest, (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; }