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px4-firmware/apps/examples/nximage/nximage_bkgd.c

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/****************************************************************************
* examples/nximage/nximage_bkgd.c
*
* Copyright (C) 2011 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 <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <semaphore.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/nx/nx.h>
#include <nuttx/nx/nxglib.h>
#include <nuttx/nx/nxfonts.h>
#include "nximage.h"
/****************************************************************************
* Definitions
****************************************************************************/
/* Select renderer -- Some additional logic would be required to support
* pixel depths that are not directly addressable (1,2,4, and 24).
*/
#if CONFIG_EXAMPLES_NXIMAGE_BPP == 1
# define RENDERER nxf_convert_1bpp
#elif CONFIG_EXAMPLES_NXIMAGE_BPP == 2
# define RENDERER nxf_convert_2bpp
#elif CONFIG_EXAMPLES_NXIMAGE_BPP == 4
# define RENDERER nxf_convert_4bpp
#elif CONFIG_EXAMPLES_NXIMAGE_BPP == 8
# define RENDERER nxf_convert_8bpp
#elif CONFIG_EXAMPLES_NXIMAGE_BPP == 16
# define RENDERER nxf_convert_16bpp
#elif CONFIG_EXAMPLES_NXIMAGE_BPP == 24
# define RENDERER nxf_convert_24bpp
#elif CONFIG_EXAMPLES_NXIMAGE_BPP == 32
# define RENDERER nxf_convert_32bpp
#else
# error "Unsupported CONFIG_EXAMPLES_NXIMAGE_BPP"
#endif
/* Vertical scaling */
#if defined(CONFIG_EXAMPLES_NXIMAGE_YSCALEp5)
/* Read two rows, output one averaged row */
#define NINPUT_ROWS 2
#define NOUTPUT_ROWS 1
#elif defined(CONFIG_EXAMPLES_NXIMAGE_YSCALE1p5)
/* Read two rows, output three rows */
#define NINPUT_ROWS 2
#define NOUTPUT_ROWS 3
#elif defined(CONFIG_EXAMPLES_NXIMAGE_YSCALE2p0)
/* Read one row, output two rows */
#define NINPUT_ROWS 1
#define NOUTPUT_ROWS 2
#else
/* Read one rows, output one or two rows */
#define NINPUT_ROWS 1
#define NOUTPUT_ROWS 1
#endif
/****************************************************************************
* Private Types
****************************************************************************/
struct nximage_run_t
{
nxgl_mxpixel_t run[SCALED_WIDTH];
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
static void nximage_redraw(NXWINDOW hwnd, FAR const struct nxgl_rect_s *rect,
bool more, FAR void *arg);
static void nximage_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_MOUSE
static void nximage_mousein(NXWINDOW hwnd, FAR const struct nxgl_point_s *pos,
uint8_t buttons, FAR void *arg);
#endif
#ifdef CONFIG_NX_KBD
static void nximage_kbdin(NXWINDOW hwnd, uint8_t nch, FAR const uint8_t *ch,
FAR void *arg);
#endif
/****************************************************************************
* Private Data
****************************************************************************/
static const char g_hello[] = "Hello, World!";
/* Read one or two rows, output one tow or three rows */
static struct nximage_run_t g_runs[NINPUT_ROWS];
/****************************************************************************
* Public Data
****************************************************************************/
/* Background window call table */
const struct nx_callback_s g_nximagecb =
{
nximage_redraw, /* redraw */
nximage_position /* position */
#ifdef CONFIG_NX_MOUSE
, nximage_mousein /* mousein */
#endif
#ifdef CONFIG_NX_KBD
, nximage_kbdin /* my kbdin */
#endif
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: nximage_redraw
*
* Description:
* NX re-draw handler
*
****************************************************************************/
static void nximage_redraw(NXWINDOW hwnd, FAR const struct nxgl_rect_s *rect,
bool more, FAR void *arg)
{
gvdbg("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: nximage_position
*
* Description:
* NX position change handler
*
****************************************************************************/
static void nximage_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 */
gvdbg("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_nximage.havepos)
{
/* Save the background window handle */
g_nximage.hbkgd = hwnd;
/* Save the window limits */
g_nximage.xres = bounds->pt2.x + 1;
g_nximage.yres = bounds->pt2.y + 1;
g_nximage.havepos = true;
sem_post(&g_nximage.sem);
gvdbg("Have xres=%d yres=%d\n", g_nximage.xres, g_nximage.yres);
}
}
/****************************************************************************
* Name: nximage_mousein
*
* Description:
* NX mouse input handler
*
****************************************************************************/
#ifdef CONFIG_NX_MOUSE
static void nximage_mousein(NXWINDOW hwnd, FAR const struct nxgl_point_s *pos,
uint8_t buttons, FAR void *arg)
{
message("nximage_mousein: hwnd=%p pos=(%d,%d) button=%02x\n",
hwnd, pos->x, pos->y, buttons);
}
#endif
/****************************************************************************
* Name: nximage_kbdin
*
* Description:
* NX keyboard input handler
*
****************************************************************************/
#ifdef CONFIG_NX_KBD
static void nximage_kbdin(NXWINDOW hwnd, uint8_t nch, FAR const uint8_t *ch,
FAR void *arg)
{
gvdbg("hwnd=%p nch=%d\n", hwnd, nch);
/* In this example, there is no keyboard so a keyboard event is not
* expected.
*/
message("nximage_kbdin: Unexpected keyboard callback\n");
}
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: nximage_image
*
* Description:
* Put the NuttX logo in the center of the display.
*
****************************************************************************/
void nximage_image(NXWINDOW hwnd)
{
FAR const void *state = NULL;
FAR struct nxgl_point_s pos;
FAR struct nxgl_rect_s dest;
FAR const void *src[CONFIG_NX_NPLANES];
nxgl_coord_t row;
int ret;
#if defined(CONFIG_EXAMPLES_NXIMAGE_YSCALEp5) || defined(CONFIG_EXAMPLES_NXIMAGE_YSCALE1p5)
int i;
#endif
/* Center the image. Note: these may extend off the display. */
pos.x = (g_nximage.xres - SCALED_WIDTH) / 2;
pos.y = (g_nximage.yres - SCALED_HEIGHT) / 2;
/* Set up the invariant part of the destination bounding box */
dest.pt1.x = pos.x;
dest.pt2.x = pos.x + SCALED_WIDTH - 1;
/* Now output the rows */
for (row = 0; row < IMAGE_HEIGHT; row += NINPUT_ROWS)
{
/* Read input row(s) */
nximage_blitrow(g_runs[0].run, &state);
#if NINPUT_ROWS > 1
nximage_blitrow(g_runs[1].run, &state);
#endif
/* Output rows before averaging */
#if defined(CONFIG_EXAMPLES_NXIMAGE_YSCALE1p5) || defined(CONFIG_EXAMPLES_NXIMAGE_YSCALE2p0)
/* Output row[0] */
dest.pt1.y = pos.y;
dest.pt2.y = pos.y;
src[0] = (FAR const void *)g_runs[0].run;
#if CONFIG_NX_NPLANES > 1
# warning "More logic is needed for the case where CONFIG_NX_PLANES > 1"
#endif
ret = nx_bitmap((NXWINDOW)hwnd, &dest, src, &pos, SCALED_WIDTH*sizeof(nxgl_mxpixel_t));
if (ret < 0)
{
message("nximage_image: nx_bitmapwindow failed: %d\n", errno);
}
/* Increment the vertical position */
pos.y++;
#endif
/* Perform averaging */
#if defined(CONFIG_EXAMPLES_NXIMAGE_YSCALEp5) || defined(CONFIG_EXAMPLES_NXIMAGE_YSCALE1p5)
/* Average row[0] and row[1], output results in row[0] */
for (i = 0; i < SCALED_WIDTH; i++)
{
/* Only average if the corresponding pixels in each row differ */
nxgl_mxpixel_t pix0 = g_runs[0].run[i];
nxgl_mxpixel_t pix1 = g_runs[1].run[i];
if (pix0 != pix1)
{
g_runs[0].run[i] = nximage_avgcolor(pix0, pix1);
}
}
#endif
/* Output rows after averaging */
/* Output row[0] */
dest.pt1.y = pos.y;
dest.pt2.y = pos.y;
src[0] = (FAR const void *)g_runs[0].run;
#if CONFIG_NX_NPLANES > 1
# warning "More logic is needed for the case where CONFIG_NX_PLANES > 1"
#endif
ret = nx_bitmap((NXWINDOW)hwnd, &dest, src, &pos, SCALED_WIDTH*sizeof(nxgl_mxpixel_t));
if (ret < 0)
{
message("nximage_image: nx_bitmapwindow failed: %d\n", errno);
}
/* Increment the vertical position */
pos.y++;
#if defined(CONFIG_EXAMPLES_NXIMAGE_YSCALE1p5)
/* Output row[0] and row[1] */
dest.pt1.y = pos.y;
dest.pt2.y = pos.y;
src[0] = (FAR const void *)g_runs[1].run;
#if CONFIG_NX_NPLANES > 1
# warning "More logic is needed for the case where CONFIG_NX_PLANES > 1"
#endif
ret = nx_bitmap((NXWINDOW)hwnd, &dest, src, &pos, SCALED_WIDTH*sizeof(nxgl_mxpixel_t));
if (ret < 0)
{
message("nximage_image: nx_bitmapwindow failed: %d\n", errno);
}
/* Increment the vertical position */
pos.y++;
#endif
}
}
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