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nuttx-apps/examples/nxlines/nxlines_bkgd.c

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/****************************************************************************
* examples/nxlines/nxlines_bkgd.c
*
* Copyright (C) 2011-2012, 2015, 2017 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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 <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <debug.h>
#include <fixedmath.h>
#include <nuttx/nx/nx.h>
#include <nuttx/nx/nxglib.h>
#include "nxlines.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#ifdef CONFIG_NX_ANTIALIASING
/* If anti-aliasing is enabled, then we must clear a slightly
* larger region to prevent wierd edge effects.
*/
# define CLEAR_WIDTH (CONFIG_EXAMPLES_NXLINES_LINEWIDTH + 2)
#else
# define CLEAR_WIDTH CONFIG_EXAMPLES_NXLINES_LINEWIDTH
#endif
#ifndef MIN
# define MIN(a,b) (a < b ? a : b)
#endif
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
static void nxlines_redraw(NXWINDOW hwnd, FAR const struct nxgl_rect_s *rect,
bool morem, FAR void *arg);
static void nxlines_position(NXWINDOW hwnd, FAR const struct nxgl_size_s *size,
FAR const struct nxgl_point_s *pos,
FAR const struct nxgl_rect_s *bounds,
FAR void *arg);
#ifdef CONFIG_NX_XYINPUT
static void nxlines_mousein(NXWINDOW hwnd, FAR const struct nxgl_point_s *pos,
uint8_t buttons, FAR void *arg);
#endif
#ifdef CONFIG_NX_KBD
static void nxlines_kbdin(NXWINDOW hwnd, uint8_t nch, FAR const uint8_t *ch,
FAR void *arg);
#endif
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
/* Background window call table */
const struct nx_callback_s g_nxlinescb =
{
nxlines_redraw, /* redraw */
nxlines_position /* position */
#ifdef CONFIG_NX_XYINPUT
, nxlines_mousein /* mousein */
#endif
#ifdef CONFIG_NX_KBD
, nxlines_kbdin /* my kbdin */
#endif
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: nxlines_redraw
****************************************************************************/
static void nxlines_redraw(NXWINDOW hwnd, FAR const struct nxgl_rect_s *rect,
bool more, FAR void *arg)
{
ginfo("hwnd=%p rect={(%d,%d),(%d,%d)} more=%s\n",
hwnd, rect->pt1.x, rect->pt1.y, rect->pt2.x, rect->pt2.y,
more ? "true" : "false");
}
/****************************************************************************
* Name: nxlines_position
****************************************************************************/
static void nxlines_position(NXWINDOW hwnd, FAR const struct nxgl_size_s *size,
FAR const struct nxgl_point_s *pos,
FAR const struct nxgl_rect_s *bounds,
FAR void *arg)
{
/* Report the position */
ginfo("hwnd=%p size=(%d,%d) pos=(%d,%d) bounds={(%d,%d),(%d,%d)}\n",
hwnd, size->w, size->h, pos->x, pos->y,
bounds->pt1.x, bounds->pt1.y, bounds->pt2.x, bounds->pt2.y);
/* Have we picked off the window bounds yet? */
if (!g_nxlines.havepos)
{
/* Save the background window handle */
g_nxlines.hbkgd = hwnd;
/* Save the window limits */
g_nxlines.xres = bounds->pt2.x + 1;
g_nxlines.yres = bounds->pt2.y + 1;
g_nxlines.havepos = true;
sem_post(&g_nxlines.eventsem);
ginfo("Have xres=%d yres=%d\n", g_nxlines.xres, g_nxlines.yres);
}
}
/****************************************************************************
* Name: nxlines_mousein
****************************************************************************/
#ifdef CONFIG_NX_XYINPUT
static void nxlines_mousein(NXWINDOW hwnd, FAR const struct nxgl_point_s *pos,
uint8_t buttons, FAR void *arg)
{
printf("nxlines_mousein: hwnd=%p pos=(%d,%d) button=%02x\n",
hwnd, pos->x, pos->y, buttons);
}
#endif
/****************************************************************************
* Name: nxlines_kbdin
****************************************************************************/
#ifdef CONFIG_NX_KBD
static void nxlines_kbdin(NXWINDOW hwnd, uint8_t nch, FAR const uint8_t *ch,
FAR void *arg)
{
ginfo("hwnd=%p nch=%d\n", hwnd, nch);
/* In this example, there is no keyboard so a keyboard event is not
* expected.
*/
printf("nxlines_kbdin: Unexpected keyboard callback\n");
}
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: nxlines_test
*
* Description:
* Print "Hello, World!" in the center of the display.
*
****************************************************************************/
void nxlines_test(NXWINDOW hwnd)
{
struct nxgl_point_s center;
struct nxgl_vector_s vector;
struct nxgl_vector_s previous;
nxgl_mxpixel_t color[CONFIG_NX_NPLANES];
nxgl_coord_t maxradius;
nxgl_coord_t radius;
nxgl_coord_t halfx;
nxgl_coord_t halfy;
b16_t angle;
b16_t sinangle;
b16_t cosangle;
int ret;
/* Get the maximum radius and center of the circle */
maxradius = MIN(g_nxlines.yres, g_nxlines.xres) >> 1;
center.x = g_nxlines.xres >> 1;
center.y = g_nxlines.yres >> 1;
/* Draw a circular background */
radius = maxradius - ((CONFIG_EXAMPLES_NXLINES_BORDERWIDTH+1)/2);
color[0] = CONFIG_EXAMPLES_NXLINES_CIRCLECOLOR;
ret = nx_fillcircle((NXWINDOW)hwnd, &center, radius, color);
if (ret < 0)
{
printf("nxlines_test: nx_fillcircle failed: %d\n", ret);
}
/* Draw the circular border */
color[0] = CONFIG_EXAMPLES_NXLINES_BORDERCOLOR;
ret = nx_drawcircle((NXWINDOW)hwnd, &center, radius,
CONFIG_EXAMPLES_NXLINES_BORDERWIDTH, color);
if (ret < 0)
{
printf("nxlines_test: nx_fillcircle failed: %d\n", ret);
}
/* Back off the radius to account for the thickness of border line
* and with a big fudge factor that will (hopefully) prevent the corners
* of the lines from overwriting the border. This is overly complicated
* here because we don't assume anything about the screen resolution or
* the borderwidth or the line thickness (and there are certainly some
* smarter ways to do this).
*/
if (maxradius > (CONFIG_EXAMPLES_NXLINES_BORDERWIDTH + 80))
{
radius = maxradius - (CONFIG_EXAMPLES_NXLINES_BORDERWIDTH + 40);
}
else if (maxradius > (CONFIG_EXAMPLES_NXLINES_BORDERWIDTH + 60))
{
radius = maxradius - (CONFIG_EXAMPLES_NXLINES_BORDERWIDTH + 30);
}
else if (maxradius > (CONFIG_EXAMPLES_NXLINES_BORDERWIDTH + 40))
{
radius = maxradius - (CONFIG_EXAMPLES_NXLINES_BORDERWIDTH + 20);
}
else if (maxradius > (CONFIG_EXAMPLES_NXLINES_BORDERWIDTH + 20))
{
radius = maxradius - (CONFIG_EXAMPLES_NXLINES_BORDERWIDTH + 10);
}
else
{
radius = maxradius - CONFIG_EXAMPLES_NXLINES_BORDERWIDTH;
}
/* The loop, showing the line in various orientations */
angle = 0;
previous.pt1.x = center.x;
previous.pt1.y = center.y;
previous.pt2.x = center.x;
previous.pt2.y = center.y;
for (;;)
{
/* Determine the position of the line on this pass */
sinangle = b16sin(angle);
halfx = b16toi(b16muli(sinangle, radius));
cosangle = b16cos(angle);
halfy = b16toi(b16muli(cosangle, radius));
vector.pt1.x = center.x + halfx;
vector.pt1.y = center.y + halfy;
vector.pt2.x = center.x - halfx;
vector.pt2.y = center.y - halfy;
printf("Angle: %08x vector: (%d,%d)->(%d,%d)\n",
angle, vector.pt1.x, vector.pt1.y, vector.pt2.x, vector.pt2.y);
/* Clear the previous line by overwriting it with the circle color */
color[0] = CONFIG_EXAMPLES_NXLINES_CIRCLECOLOR;
ret = nx_drawline((NXWINDOW)hwnd, &previous, CLEAR_WIDTH, color,
NX_LINECAP_NONE);
if (ret < 0)
{
printf("nxlines_test: nx_drawline failed clearing: %d\n", ret);
}
/* Draw the new line */
color[0] = CONFIG_EXAMPLES_NXLINES_LINECOLOR;
ret = nx_drawline((NXWINDOW)hwnd, &vector,
CONFIG_EXAMPLES_NXLINES_LINEWIDTH, color,
NX_LINECAP_NONE);
if (ret < 0)
{
printf("nxlines_test: nx_drawline failed clearing: %d\n", ret);
}
#ifdef CONFIG_NX_ANTIALIASING
/* If anti-aliasing is enabled, then we must clear a slightly
* larger region to prevent wierd edge effects.
*/
halfx = b16toi(b16muli(sinangle, radius + 1));
halfy = b16toi(b16muli(cosangle, radius + 1));
previous.pt1.x = center.x + halfx;
previous.pt1.y = center.y + halfy;
previous.pt2.x = center.x - halfx;
previous.pt2.y = center.y - halfy;
#else
memcpy(&previous, &vector, sizeof(struct nxgl_vector_s));
#endif
/* Set up for the next time through the loop then sleep for a bit. */
angle += b16PI / 16; /* 32 angular positions in full circle */
/* Check if we have gone all the way around */
if (angle > (31 * (2 * b16PI) / 32))
{
#ifdef CONFIG_NSH_BUILTIN_APPS
/* If this example was built as an NSH add-on, then exit after we
* have gone all the way around once.
*/
return;
#else
/* Wrap back to zero and continue with the test */
angle = 0;
#endif
}
usleep(500*1000);
}
}
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