1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/stereoimg.c	Thu Jun 14 00:31:51 2012 +0300
     1.3 @@ -0,0 +1,203 @@
     1.4 +/*
     1.5 +Stereoimg - an OpenGL stereoscopic image viewer.
     1.6 +Copyright (C) 2011  John Tsiombikas <nuclear@member.fsf.org>
     1.7 +
     1.8 +This program is free software: you can redistribute it and/or modify
     1.9 +it under the terms of the GNU General Public License as published by
    1.10 +the Free Software Foundation, either version 3 of the License, or
    1.11 +(at your option) any later version.
    1.12 +
    1.13 +This program is distributed in the hope that it will be useful,
    1.14 +but WITHOUT ANY WARRANTY; without even the implied warranty of
    1.15 +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    1.16 +GNU General Public License for more details.
    1.17 +
    1.18 +You should have received a copy of the GNU General Public License
    1.19 +along with this program.  If not, see <http://www.gnu.org/licenses/>.
    1.20 +*/
    1.21 +
    1.22 +#include <stdio.h>
    1.23 +#include <stdlib.h>
    1.24 +#include <assert.h>
    1.25 +
    1.26 +#ifndef __APPLE__
    1.27 +#include <GL/glut.h>
    1.28 +#else
    1.29 +#include <GLUT/glut.h>
    1.30 +#endif
    1.31 +
    1.32 +#include <imago2.h>
    1.33 +
    1.34 +struct imgnode {
    1.35 +	char *name;
    1.36 +	int width, height;
    1.37 +	unsigned int tex;
    1.38 +	int swap;
    1.39 +
    1.40 +	struct imgnode *next;
    1.41 +};
    1.42 +
    1.43 +void show_image(struct imgnode *node);
    1.44 +void disp(void);
    1.45 +void reshape(int x, int y);
    1.46 +void keyb(unsigned char key, int x, int y);
    1.47 +int parse_args(int argc, char **argv);
    1.48 +
    1.49 +
    1.50 +struct imgnode *imglist;
    1.51 +int swap_eyes;
    1.52 +
    1.53 +
    1.54 +int main(int argc, char **argv)
    1.55 +{
    1.56 +	glutInit(&argc, argv);
    1.57 +	glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);// | GLUT_STEREO);
    1.58 +	glutInitWindowSize(128, 128);
    1.59 +	glutCreateWindow("stereo image viewer");
    1.60 +
    1.61 +	if(parse_args(argc, argv) == -1) {
    1.62 +		return 1;
    1.63 +	}
    1.64 +
    1.65 +	glutDisplayFunc(disp);
    1.66 +	glutReshapeFunc(reshape);
    1.67 +	glutKeyboardFunc(keyb);
    1.68 +	glutIdleFunc(glutPostRedisplay);
    1.69 +
    1.70 +	glEnable(GL_TEXTURE_2D);
    1.71 +	show_image(imglist);
    1.72 +
    1.73 +	glutMainLoop();
    1.74 +	return 0;
    1.75 +}
    1.76 +
    1.77 +
    1.78 +void show_image(struct imgnode *node)
    1.79 +{
    1.80 +	glutReshapeWindow(node->width / 2, node->height);
    1.81 +	glutSetWindowTitle(node->name);
    1.82 +
    1.83 +	glBindTexture(GL_TEXTURE_2D, node->tex);
    1.84 +
    1.85 +	swap_eyes = node->swap;
    1.86 +}
    1.87 +
    1.88 +void disp(void)
    1.89 +{
    1.90 +	glDrawBuffer(swap_eyes ? GL_BACK_RIGHT : GL_BACK_LEFT);
    1.91 +	glClear(GL_COLOR_BUFFER_BIT);
    1.92 +
    1.93 +	glBegin(GL_QUADS);
    1.94 +	glColor3f(1, 1, 1);
    1.95 +	glTexCoord2f(0, 1); glVertex2f(-1, -1);
    1.96 +	glTexCoord2f(0.5, 1); glVertex2f(1, -1);
    1.97 +	glTexCoord2f(0.5, 0); glVertex2f(1, 1);
    1.98 +	glTexCoord2f(0, 0); glVertex2f(-1, 1);
    1.99 +	glEnd();
   1.100 +
   1.101 +	glDrawBuffer(swap_eyes ? GL_BACK_LEFT : GL_BACK_RIGHT);
   1.102 +	glClear(GL_COLOR_BUFFER_BIT);
   1.103 +
   1.104 +	glBegin(GL_QUADS);
   1.105 +	glColor3f(1, 1, 1);
   1.106 +	glTexCoord2f(0.5, 1); glVertex2f(-1, -1);
   1.107 +	glTexCoord2f(1, 1); glVertex2f(1, -1);
   1.108 +	glTexCoord2f(1, 0); glVertex2f(1, 1);
   1.109 +	glTexCoord2f(0.5, 0); glVertex2f(-1, 1);
   1.110 +	glEnd();
   1.111 +
   1.112 +	glutSwapBuffers();
   1.113 +	assert(glGetError() == GL_NO_ERROR);
   1.114 +}
   1.115 +
   1.116 +void reshape(int x, int y)
   1.117 +{
   1.118 +	glViewport(0, 0, x, y);
   1.119 +}
   1.120 +
   1.121 +void keyb(unsigned char key, int x, int y)
   1.122 +{
   1.123 +	switch(key) {
   1.124 +	case 's':
   1.125 +		swap_eyes = !swap_eyes;
   1.126 +		glutPostRedisplay();
   1.127 +		break;
   1.128 +
   1.129 +	case ' ':
   1.130 +		imglist = imglist->next;
   1.131 +		show_image(imglist);
   1.132 +		glutPostRedisplay();
   1.133 +		break;
   1.134 +
   1.135 +	case 27:
   1.136 +	case 'q':
   1.137 +		exit(0);
   1.138 +
   1.139 +	default:
   1.140 +		break;
   1.141 +	}
   1.142 +}
   1.143 +
   1.144 +int parse_args(int argc, char **argv)
   1.145 +{
   1.146 +	int i, cur_swap = 0;
   1.147 +	struct imgnode *node;
   1.148 +	struct imgnode *head = 0, *tail = 0;
   1.149 +
   1.150 +	for(i=1; i<argc; i++) {
   1.151 +		if(argv[i][0] == '-' && argv[i][2] == 0) {
   1.152 +			switch(argv[i][1]) {
   1.153 +			case 's':
   1.154 +				cur_swap = !cur_swap;
   1.155 +				break;
   1.156 +
   1.157 +			default:
   1.158 +				fprintf(stderr, "invalid option: %s\n", argv[i]);
   1.159 +				return -1;
   1.160 +			}
   1.161 +		} else {
   1.162 +			int xsz, ysz;
   1.163 +			void *pix;
   1.164 +			unsigned int tex;
   1.165 +
   1.166 +			if(!(pix = img_load_pixels(argv[i], &xsz, &ysz, IMG_FMT_RGBA32))) {
   1.167 +				fprintf(stderr, "failed to open image: %s\n", argv[i]);
   1.168 +				return -1;
   1.169 +			}
   1.170 +			glGenTextures(1, &tex);
   1.171 +			glBindTexture(GL_TEXTURE_2D, tex);
   1.172 +			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
   1.173 +			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
   1.174 +			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
   1.175 +			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
   1.176 +			glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, xsz, ysz, 0, GL_RGBA, GL_UNSIGNED_BYTE, pix);
   1.177 +			img_free_pixels(pix);
   1.178 +
   1.179 +			if(!(node = malloc(sizeof *node))) {
   1.180 +				perror("failed to allocate image node");
   1.181 +				return -1;
   1.182 +			}
   1.183 +			node->name = argv[i];
   1.184 +			node->width = xsz;
   1.185 +			node->height = ysz;
   1.186 +			node->tex = tex;
   1.187 +			node->swap = cur_swap;
   1.188 +			node->next = 0;
   1.189 +
   1.190 +			if(head) {
   1.191 +				tail->next = node;
   1.192 +				tail = node;
   1.193 +			} else {
   1.194 +				head = tail = node;
   1.195 +			}
   1.196 +		}
   1.197 +	}
   1.198 +
   1.199 +	if(!head) {
   1.200 +		fprintf(stderr, "you must specify one or more images to open\n");
   1.201 +		return -1;
   1.202 +	}
   1.203 +	tail->next = head;
   1.204 +	imglist = head;
   1.205 +	return 0;
   1.206 +}