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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2008-11-28 13:20:36 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2008-11-28 13:20:36 +0000 |
commit | 0039d56702a25aec6ff26bed044cd607bc0306b4 (patch) | |
tree | ced0f16b3ad7a3e3cd7dc3e7e471483166df2edd /nuttx/graphics/nxglib | |
parent | cb311769b6806d5eb0a0b976d062d3c1c3cad2d4 (diff) | |
download | px4-nuttx-0039d56702a25aec6ff26bed044cd607bc0306b4.tar.gz px4-nuttx-0039d56702a25aec6ff26bed044cd607bc0306b4.tar.bz2 px4-nuttx-0039d56702a25aec6ff26bed044cd607bc0306b4.zip |
Add support for trapezoidal fills
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1323 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/graphics/nxglib')
-rw-r--r-- | nuttx/graphics/nxglib/Make.defs | 6 | ||||
-rw-r--r-- | nuttx/graphics/nxglib/nxglib_filltrapezoid.c | 60 | ||||
-rw-r--r-- | nuttx/graphics/nxglib/nxglib_runoffset.c | 86 | ||||
-rw-r--r-- | nuttx/graphics/nxglib/nxglib_trapoffset.c | 83 |
4 files changed, 215 insertions, 20 deletions
diff --git a/nuttx/graphics/nxglib/Make.defs b/nuttx/graphics/nxglib/Make.defs index ab0427e8b..82ce3bdd9 100644 --- a/nuttx/graphics/nxglib/Make.defs +++ b/nuttx/graphics/nxglib/Make.defs @@ -51,10 +51,12 @@ RMOVE2_CSRCS = nxglib_moverectangle_8bpp.c nxglib_moverectangle_16bpp.c \ # nxglib_copyrectangle_4bpp.c RCOPY2_CSRCS = nxglib_copyrectangle_8bpp.c nxglib_copyrectangle_16bpp.c \ nxglib_copyrectangle_24bpp.c nxglib_copyrectangle_32bpp.c -RECT_CRCS = nxglib_rectcopy.c nxglib_rectoffset.c nxglib_vectoradd.c \ +RECT_CSRCS = nxglib_rectcopy.c nxglib_rectoffset.c nxglib_vectoradd.c \ nxglib_rectintersect.c nxglib_nonintersecting.c \ nxglib_rectoverlap.c nxglib_nullrect.c +TRAP_CSRCS = nxglib_runoffset.c nxglib_trapoffset.c NXGLIB_CSRCS = nxglib_rgb2yuv.c nxglib_yuv2rgb.c \ $(RFILL1_CSRCS) $(RFILL2_CSRCS) $(TFILL1_CSRCS) $(TFILL2_CSRCS) \ - $(RMOVE1_CSRCS) $(RMOVE2_CSRCS) $(RCOPY1_CSRCS) $(RCOPY2_CSRCS) + $(RMOVE1_CSRCS) $(RMOVE2_CSRCS) $(RCOPY1_CSRCS) $(RCOPY2_CSRCS) \ + $(RECT_CSRCS) $(TRAP_CSRCS) diff --git a/nuttx/graphics/nxglib/nxglib_filltrapezoid.c b/nuttx/graphics/nxglib/nxglib_filltrapezoid.c index 2343a4680..a4ea25e51 100644 --- a/nuttx/graphics/nxglib/nxglib_filltrapezoid.c +++ b/nuttx/graphics/nxglib/nxglib_filltrapezoid.c @@ -79,20 +79,24 @@ * * Descripton: * Fill a trapezoidal region in the framebuffer memory with a fixed color. - * This is useful for drawing complex shape -- (most) complex shapes can be - * broken into a set of trapezoids. + * 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(nxglib_filltrapezoid,NXGLIB_SUFFIX) -(FAR struct fb_videoinfo_s *vinfo, FAR struct fb_planeinfo_s *pinfo, - FAR const struct nxgl_trapezoid_s *trap, nxgl_mxpixel_t color) +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_mxpixel_t color) { unsigned int stride; ubyte *line; int nrows; b16_t x1; b16_t x2; + nxgl_coord_t y1; + nxgl_coord_t y2; b16_t dx1dy; b16_t dx2dy; @@ -102,18 +106,38 @@ void NXGL_FUNCNAME(nxglib_filltrapezoid,NXGLIB_SUFFIX) /* Get the top run position and the number of rows to draw */ - x1 = trap->top.x1; - x2 = trap->top.x2; - nrows = trap->bot.y - trap->top.y + 1; + x1 = trap->top.x1; + x2 = trap->top.x2; - /* Get the address of the first byte on the first line */ + /* Calculate the slope of the left and right side of the trapezoid */ - line = pinfo->fbmem + trap->top.y * stride ; + dx1dy = b16divi((trap->bot.x1 - x1), nrows); + dx2dy = b16divi((trap->bot.x2 - x2), nrows); - /* Calculate the slope of the left and right side of the trapezoid */ + /* Perform vertical clipping */ + + y1 = trap->top.y; + if (y1 < bounds->pt1.y) + { + int dy = bounds->pt1.y - y1; + x1 += dy * dx1dy; + x2 += dy * dx2dy; + y1 = bounds->pt1.y; + } + + y2 = trap->bot.y; + if (y2 > bounds->pt2.y) + { + y2 = bounds->pt2.y; + } + + /* Then calculate the number of rows to render */ + + nrows = y2 - y1 + 1; + + /* Get the address of the first byte on the first line */ - dx1dy = b16divi((trap->bot.x1 - x1), nrows); - dx2dy = b16divi((trap->bot.x2 - x2), nrows); + line = pinfo->fbmem + y1 * stride ; /* Then fill the trapezoid line-by-line */ @@ -140,17 +164,17 @@ void NXGL_FUNCNAME(nxglib_filltrapezoid,NXGLIB_SUFFIX) * always draw at least one pixel. */ - if (x1 > x2 || ix2 < 0 || ix1 > vinfo->yres) + if (x1 > x2 || ix2 < bounds->pt1.x || ix1 > bounds->pt2.x) { - /* Get a clipped copies of the startingand ending X positions. This + /* 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, 0); - ix2 = ngl_clipr(ix2, vinfo->yres); + ix1 = ngl_clipl(ix1, bounds->pt1.x); + ix2 = ngl_clipr(ix2, bounds->pt2.x); - /* Then draw the run from (line + clipx1) to (line + clipx2) */ + /* Then draw the run from (line + ix1) to (line + ix2) */ NXGL_MEMSET(line + NXGL_SCALEX(ix1), (NXGL_PIXEL_T)color, ix2 - ix1 + 1); } diff --git a/nuttx/graphics/nxglib/nxglib_runoffset.c b/nuttx/graphics/nxglib/nxglib_runoffset.c new file mode 100644 index 000000000..02aaab894 --- /dev/null +++ b/nuttx/graphics/nxglib/nxglib_runoffset.c @@ -0,0 +1,86 @@ +/**************************************************************************** + * graphics/nxglib/nxsglib_runoffset.c + * + * Copyright (C) 2008 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 <sys/types.h> +#include <fixedmath.h> +#include <nuttx/nxglib.h> + +/**************************************************************************** + * Pre-Processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Public Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: nxgl_runoffset + * + * Description: + * Offset the run position by the specified dx, dy values. + * + ****************************************************************************/ + +void nxgl_runoffset(FAR struct nxgl_run_s *dest, + FAR const struct nxgl_run_s *src, + nxgl_coord_t dx, nxgl_coord_t dy) +{ + b16_t b16dx = itob16(dx); + dest->x1 += b16dx; + dest->x2 += b16dx; + dest->y += dy; +} diff --git a/nuttx/graphics/nxglib/nxglib_trapoffset.c b/nuttx/graphics/nxglib/nxglib_trapoffset.c new file mode 100644 index 000000000..4c6f1cffa --- /dev/null +++ b/nuttx/graphics/nxglib/nxglib_trapoffset.c @@ -0,0 +1,83 @@ +/**************************************************************************** + * graphics/nxglib/nxsglib_trapoffset.c + * + * Copyright (C) 2008 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 <sys/types.h> +#include <nuttx/nxglib.h> + +/**************************************************************************** + * Pre-Processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Public Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: nxgl_trapoffset + * + * Description: + * Offset the trapezoid position by the specified dx, dy values. + * + ****************************************************************************/ + +void nxgl_trapoffset(FAR struct nxgl_trapezoid_s *dest, + FAR const struct nxgl_trapezoid_s *src, + nxgl_coord_t dx, nxgl_coord_t dy) +{ + nxgl_runoffset(&dest->top, &src->top, dx, dy); + nxgl_runoffset(&dest->bot, &src->bot, dx, dy); +} |