px4-firmware/nuttx/graphics/nxmu/nx_drawline.c

137 lines
4.8 KiB
C

/****************************************************************************
* graphics/nxmu/nx_drawline.c
*
* Copyright (C) 2011 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 <debug.h>
#include <errno.h>
#include <nuttx/nx/nxglib.h>
#include <nuttx/nx/nx.h>
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: nx_drawline
*
* Description:
* Fill the specified line in the window with the specified color. This
* is simply a wrapper that uses nxgl_splitline() to break the line into
* trapezoids and then calls nx_filltrapezoid() to render the line.
*
* Input Parameters:
* hwnd - The window handle
* vector - Describes the line to be drawn
* width - The width of the line
* color - The color to use to fill the line
*
* Return:
* OK on success; ERROR on failure with errno set appropriately
*
****************************************************************************/
int nx_drawline(NXWINDOW hwnd, FAR struct nxgl_vector_s *vector,
nxgl_coord_t width, nxgl_mxpixel_t color[CONFIG_NX_NPLANES])
{
struct nxgl_trapezoid_s trap[3];
struct nxgl_rect_s rect;
int ret;
#ifdef CONFIG_DEBUG
if (!hwnd || !vector || width < 1 || !color)
{
set_errno(EINVAL);
return ERROR;
}
#endif
ret = nxgl_splitline(vector, trap, &rect, width);
switch (ret)
{
case 0:
ret = nx_filltrapezoid(hwnd, NULL, &trap[0], color);
if (ret == OK)
{
ret = nx_filltrapezoid(hwnd, NULL, &trap[1], color);
if (ret == OK)
{
ret = nx_filltrapezoid(hwnd, NULL, &trap[2], color);
}
}
break;
case 1:
ret = nx_filltrapezoid(hwnd, NULL, &trap[1], color);
break;
case 2:
ret = nx_fill(hwnd, &rect, color);
break;
default:
set_errno(-ret);
return ERROR;
}
return ret;
}