forked from Archive/PX4-Autopilot
137 lines
4.8 KiB
C
137 lines
4.8 KiB
C
/****************************************************************************
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* graphics/nxmu/nx_drawline.c
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*
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* Copyright (C) 2011 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <debug.h>
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#include <errno.h>
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#include <nuttx/nx/nxglib.h>
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#include <nuttx/nx/nx.h>
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/****************************************************************************
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* Pre-Processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Types
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****************************************************************************/
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* Public Data
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: nx_drawline
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*
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* Description:
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* Fill the specified line in the window with the specified color. This
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* is simply a wrapper that uses nxgl_splitline() to break the line into
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* trapezoids and then calls nx_filltrapezoid() to render the line.
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*
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* Input Parameters:
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* hwnd - The window handle
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* vector - Describes the line to be drawn
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* width - The width of the line
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* color - The color to use to fill the line
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*
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* Return:
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* OK on success; ERROR on failure with errno set appropriately
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*
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****************************************************************************/
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int nx_drawline(NXWINDOW hwnd, FAR struct nxgl_vector_s *vector,
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nxgl_coord_t width, nxgl_mxpixel_t color[CONFIG_NX_NPLANES])
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{
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struct nxgl_trapezoid_s trap[3];
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struct nxgl_rect_s rect;
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int ret;
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#ifdef CONFIG_DEBUG
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if (!hwnd || !vector || width < 1 || !color)
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{
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set_errno(EINVAL);
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return ERROR;
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}
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#endif
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ret = nxgl_splitline(vector, trap, &rect, width);
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switch (ret)
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{
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case 0:
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ret = nx_filltrapezoid(hwnd, NULL, &trap[0], color);
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if (ret == OK)
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{
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ret = nx_filltrapezoid(hwnd, NULL, &trap[1], color);
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if (ret == OK)
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{
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ret = nx_filltrapezoid(hwnd, NULL, &trap[2], color);
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}
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}
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break;
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case 1:
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ret = nx_filltrapezoid(hwnd, NULL, &trap[1], color);
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break;
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case 2:
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ret = nx_fill(hwnd, &rect, color);
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break;
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default:
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set_errno(-ret);
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return ERROR;
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}
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return ret;
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}
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