150 lines
4.4 KiB
C
150 lines
4.4 KiB
C
/****************************************************************************
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* libs/libnx/nxtk/nxtk_drawlinetoolbar.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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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#include <nuttx/nx/nxtk.h>
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: nxtk_drawlinetoolbar
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*
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* Description:
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* Fill the specified line in the toolbar sub-window with the specified
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* color. This is simply a wrapper that uses nxgl_splitline() to break the
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* line into trapezoids and then calls nxtk_filltrapwindow() to render the
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* line.
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*
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* Input Parameters:
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* hfwnd - The window handle returned by nxtk_openwindow
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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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* caps - Draw a circular cap on the ends of the line to support better
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* line joins
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*
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* Returned Value:
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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 nxtk_drawlinetoolbar(NXTKWINDOW hfwnd,
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FAR struct nxgl_vector_s *vector,
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nxgl_coord_t width,
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nxgl_mxpixel_t color[CONFIG_NX_NPLANES],
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uint8_t caps)
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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_FEATURES
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if (!hfwnd || !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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/* Split the line into trapezoids */
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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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/* 0: Line successfully broken up into three trapezoids.
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* Values in
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* traps[0], traps[1], and traps[2] are valid.
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*/
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case 0:
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ret = nxtk_filltraptoolbar(hfwnd, &trap[0], color);
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if (ret == OK)
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{
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ret = nxtk_filltraptoolbar(hfwnd, &trap[1], color);
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if (ret == OK)
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{
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ret = nxtk_filltraptoolbar(hfwnd, &trap[2], color);
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}
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}
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break;
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/* 1: Line successfully represented by one trapezoid. Value in traps[1]
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* is valid.
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*/
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case 1:
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ret = nxtk_filltraptoolbar(hfwnd, &trap[1], color);
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break;
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/* 2: Line successfully represented by one rectangle. Value in rect is
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* valid
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*/
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case 2:
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ret = nxtk_filltoolbar(hfwnd, &rect, color);
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break;
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/* <0: On errors, a negated errno value is returned. */
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default:
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set_errno(EINVAL);
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return ERROR;
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}
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/* Draw circular caps at each end of the line to support better line
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* joins
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*/
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if (caps != NX_LINECAP_NONE && width >= 3)
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{
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nxgl_coord_t radius = width >> 1;
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/* Draw a circle at pt1 */
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ret = OK;
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if ((caps & NX_LINECAP_PT1) != 0)
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{
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ret = nxtk_fillcircletoolbar(hfwnd, &vector->pt1, radius, color);
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}
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/* Draw a circle at pt2 */
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if (ret == OK && (caps & NX_LINECAP_PT2) != 0)
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{
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ret = nxtk_fillcircletoolbar(hfwnd, &vector->pt2, radius, color);
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}
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}
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return ret;
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}
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