main.c

一个已经移植到嵌入式平台上的图象处理程序源代码,可以处理gif,bmp,jpg,png

/*
	fbv  --  simple image viewer for the linux framebuffer
	Copyright (C) 2000, 2001, 2003, 2004  Mateusz 'mteg' Golicz

	This program is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation; either version 2 of the License, or
	(at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program; if not, write to the Free Software
	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include <stdio.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
#include <getopt.h>
#include <stdlib.h>
#include <termios.h>
#include <string.h>
#include <signal.h>
#include <assert.h>
#include "fbv.h"

extern	struct image p_image;
static 	unsigned char *image = NULL;
static 	unsigned char *alpha = NULL;

void sighandler(int s)
{
	if (image != NULL)
		free(image);
	image = NULL;
	if (p_image.rgb != NULL)
		free(p_image.rgb);
	p_image.rgb = NULL;
	if (alpha != NULL)
		free(alpha);
	alpha = NULL;
	if (p_image.alpha != NULL)
		free(p_image.alpha);
	p_image.alpha = NULL;
	printf("\033[?25h");
	fflush(stdout);
	setup_console(0);
	_exit(128 + s);
}

int	clear_console()
{
	printf("\033[H\033[J");
	fflush(stdout);
	return 1;
}

void setup_console(int t)
{
	struct termios our_termios;
	static struct termios old_termios;
	if(t)
	{
		tcgetattr(0, &old_termios);
		memcpy(&our_termios, &old_termios, sizeof(struct termios));
		our_termios.c_lflag &= !(ECHO | ICANON);
		tcsetattr(0, TCSANOW, &our_termios);
	}
	else
		tcsetattr(0, TCSANOW, &old_termios);
}

int show_image_refresh(struct image *pimage)
{
	int ch = 0;
	while (1)
	{
		ch = getchar();
		switch (ch)
		{
			case 'q': case 10: case 13: case EOF:
				goto done;
			case '>': case '.': case '<': case ',':
				goto done;
			case 'a': 
				image_move_left();
				break;
			case 'd': 
				image_move_right();
				break;
			case 'w': 
				image_move_down();
				break;
			case 'x': 
				image_move_up();
				break;
			case 'y':
				image_pan_enlarge();
				break;
			case 'o':
				image_pan_little();
				break;
			case 'l':
				image_restore();
				break;
			case 'n':
				image_rotate_left();
				break;
			case 'm':
				image_rotate_right();
				break;
			case 'h':
				image_exchang_left_right();
				break;
			case 'u':
				image_exchang_up_down();
				break;
			case 'g':
				image_rotate_up_down();
				break;
			case 'r':
				image_full_screen();
				break;
			case 's':
				image_write_file();
				break;
			case 'i':
				image_muzzy_inc();
				break;
			case 'p':
				image_ContrastChange_inc();
				break;
			case 'e':
				image_BrightnessChange_inc();
				break;
			case 'f':
				image_RGBChange_inc(30, 30, 0);
				break;
			case 't':
				image_BrightnessChange_dec();
				//image_reflect();
				break;
			case 'b':
				image_ContrastChange_dec();
				//image_Exposure();
				break;
			case 'c':
				image_SaturationChange_dec();
				break;
			case 'j':
				image_SaturationChange_inc();
				break;
			case 'k':
				image_GrayAverage();
				break;
			case 'z':
				image_Sharpen_inc();
				//image_Engrave();
				break;
			case 'v':
				//image_muzzy_dec(p_image.rgb, p_image.width*p_image.height.3, 10);
				//image_Brightness_adjust(p_image.rgb, p_image.width, p_image.height, -20);
				image_RGBChange_adjust(p_image.rgb, p_image.width, p_image.height, -10, 10, 0);
				//image_RGBChange_dec(0, 30, 30);
				break;
		}
	}
done:
	clear_console();
	image_cleanup();
	return -1;
}

void	set_signal_handle()
{
	signal(SIGHUP, sighandler);
	signal(SIGINT, sighandler);
	signal(SIGQUIT, sighandler);
	signal(SIGSEGV, sighandler);
	signal(SIGTERM, sighandler);
	signal(SIGABRT, sighandler);
}


int main(int argc, char **argv)
{
	if(argc < 2)
	{
		fprintf(stderr, "Error: Required argument missing.\n");
		return(1);
	}
	set_signal_handle();
	setup_console(1);
	image_init(argv[1]);
	show_image_refresh(&p_image);
	setup_console(0);
	return(0);	
}