nuclear@1: #include <stdio.h>
nuclear@1: #include <stdlib.h>
nuclear@1: #include <assert.h>
nuclear@1: #include "opengl.h"
nuclear@1: #include "resman.h"
nuclear@1: #include "thumbs.h"
nuclear@1: 
nuclear@1: static int init(void);
nuclear@1: static void cleanup(void);
nuclear@1: static void display(void);
nuclear@1: /*static void idle(void);*/
nuclear@1: static void reshape(int x, int y);
nuclear@1: static void keyb(unsigned char key, int x, int y);
nuclear@1: static void mouse(int bn, int st, int x, int y);
nuclear@1: static void motion(int x, int y);
nuclear@1: static struct thumbnail *find_thumb(int x, int y);
nuclear@1: 
nuclear@1: const char *path = ".";
nuclear@1: struct resman *texman;
nuclear@1: int win_width, win_height;
nuclear@1: float win_aspect;
nuclear@1: float pan_x, pan_y;
nuclear@1: float show_pan_x, show_pan_y;
nuclear@1: float show_zoom = 1.0;
nuclear@1: float thumbs_size = 0.25;
nuclear@1: 
nuclear@1: struct thumbnail *thumbs, *show_thumb;
nuclear@1: 
nuclear@1: int main(int argc, char **argv)
nuclear@1: {
nuclear@1: 	glutInit(&argc, argv);
nuclear@1: 
nuclear@1: 	if(argv[1]) {
nuclear@1: 		path = argv[1];
nuclear@1: 	}
nuclear@1: 
nuclear@1: 	glutInitWindowSize(800, 600);
nuclear@1: 	glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);
nuclear@1: 	glutCreateWindow("imgthumbs");
nuclear@1: 
nuclear@1: 	glutDisplayFunc(display);
nuclear@1: 	glutReshapeFunc(reshape);
nuclear@1: 	glutKeyboardFunc(keyb);
nuclear@1: 	glutMouseFunc(mouse);
nuclear@1: 	glutMotionFunc(motion);
nuclear@1: 
nuclear@1: 	if(init() == -1) {
nuclear@1: 		return 1;
nuclear@1: 	}
nuclear@1: 	atexit(cleanup);
nuclear@1: 
nuclear@1: 	glutMainLoop();
nuclear@1: 	return 0;
nuclear@1: }
nuclear@1: 
nuclear@1: static int init(void)
nuclear@1: {
nuclear@1: 	thumbs = create_thumbs(path);
nuclear@1: 	return 0;
nuclear@1: }
nuclear@1: 
nuclear@1: static void cleanup(void)
nuclear@1: {
nuclear@1: 	free_thumbs(thumbs);
nuclear@1: }
nuclear@1: 
nuclear@1: static void display(void)
nuclear@1: {
nuclear@1: 	glClear(GL_COLOR_BUFFER_BIT);
nuclear@1: 
nuclear@1: 	glMatrixMode(GL_MODELVIEW);
nuclear@1: 	glLoadIdentity();
nuclear@1: 
nuclear@1: 	if(show_thumb) {
nuclear@1: 		glEnable(GL_TEXTURE_2D);
nuclear@1: 		glBindTexture(GL_TEXTURE_2D, show_thumb->tex);
nuclear@1: 
nuclear@1: 		glScalef(show_zoom, show_zoom, 1);
nuclear@1: 		glTranslatef(2.0 * show_pan_x, 2.0 * show_pan_y, 0);
nuclear@1: 		if(show_thumb->aspect >= 1.0) {
nuclear@1: 			glScalef(1, 1.0 / show_thumb->aspect, 1);
nuclear@1: 		} else {
nuclear@1: 			glScalef(show_thumb->aspect, 1, 1);
nuclear@1: 		}
nuclear@1: 
nuclear@1: 		glBegin(GL_QUADS);
nuclear@1: 		glColor3f(1, 1, 1);
nuclear@1: 		glTexCoord2f(0, 0); glVertex2f(-1, -1);
nuclear@1: 		glTexCoord2f(1, 0); glVertex2f(1, -1);
nuclear@1: 		glTexCoord2f(1, 1); glVertex2f(1, 1);
nuclear@1: 		glTexCoord2f(0, 1); glVertex2f(-1, 1);
nuclear@1: 		glEnd();
nuclear@1: 
nuclear@1: 		glDisable(GL_TEXTURE_2D);
nuclear@1: 	} else {
nuclear@1: 		draw_thumbs(thumbs, thumbs_size, pan_y);
nuclear@1: 	}
nuclear@1: 
nuclear@1: 	glutSwapBuffers();
nuclear@1: 	assert(glGetError() == GL_NO_ERROR);
nuclear@1: }
nuclear@1: 
nuclear@1: /*
nuclear@1: static void idle(void)
nuclear@1: {
nuclear@1: 	glutPostRedisplay();
nuclear@1: }
nuclear@1: */
nuclear@1: 
nuclear@1: static void reshape(int x, int y)
nuclear@1: {
nuclear@1: 	win_aspect = (float)x / (float)y;
nuclear@1: 
nuclear@1: 	glViewport(0, 0, x, y);
nuclear@1: 
nuclear@1: 	glMatrixMode(GL_PROJECTION);
nuclear@1: 	glLoadIdentity();
nuclear@1: 	glOrtho(-1, 1, 1.0 / win_aspect, -1.0 / win_aspect, -1, 1);
nuclear@1: 
nuclear@1: 	win_width = x;
nuclear@1: 	win_height = y;
nuclear@1: }
nuclear@1: 
nuclear@1: static void keyb(unsigned char key, int x, int y)
nuclear@1: {
nuclear@1: 	switch(key) {
nuclear@1: 	case 27:
nuclear@1: 		exit(0);
nuclear@1: 
nuclear@1: 	case ' ':
nuclear@1: 		show_zoom = 1.0;
nuclear@1: 		thumbs_size = 0.25;
nuclear@1: 		pan_x = pan_y = show_pan_x = show_pan_y = 0;
nuclear@1: 		glutPostRedisplay();
nuclear@1: 		break;
nuclear@1: 	}
nuclear@1: }
nuclear@1: 
nuclear@1: static int bnstate[32];
nuclear@1: static int prev_x, prev_y;
nuclear@1: static int click_x[32], click_y[32];
nuclear@1: 
nuclear@1: static void mouse(int bn, int st, int x, int y)
nuclear@1: {
nuclear@1: 	int bidx = bn - GLUT_LEFT_BUTTON;
nuclear@1: 	int state = st == GLUT_DOWN ? 1 : 0;
nuclear@1: 
nuclear@1: 	bnstate[bidx] = state;
nuclear@1: 
nuclear@1: 	prev_x = x;
nuclear@1: 	prev_y = y;
nuclear@1: 
nuclear@1: 	if(state) {
nuclear@1: 		click_x[bidx] = x;
nuclear@1: 		click_y[bidx] = y;
nuclear@1: 	} else {
nuclear@1: 		int is_drag = abs(x - click_x[bidx]) > 3 || abs(y - click_y[bidx]) > 3;
nuclear@1: 
nuclear@1: 		if(bidx == 0) {
nuclear@1: 			if(!show_thumb) {
nuclear@1: 				if(!is_drag) {
nuclear@1: 					struct thumbnail *sel = find_thumb(x, y);
nuclear@1: 					if(sel) {
nuclear@1: 						show_thumb = sel;
nuclear@1: 						show_pan_x = show_pan_y = 0;
nuclear@1: 						glutPostRedisplay();
nuclear@1: 					}
nuclear@1: 				}
nuclear@1: 			}
nuclear@1: 		} else {
nuclear@1: 			if(!is_drag) {
nuclear@1: 				show_thumb = 0;
nuclear@1: 				glutPostRedisplay();
nuclear@1: 			}
nuclear@1: 		}
nuclear@1: 	}
nuclear@1: }
nuclear@1: 
nuclear@1: static void motion(int x, int y)
nuclear@1: {
nuclear@1: 	int dx = x - prev_x;
nuclear@1: 	int dy = y - prev_y;
nuclear@1: 	prev_x = x;
nuclear@1: 	prev_y = y;
nuclear@1: 
nuclear@1: 	if(!dx && !dy) return;
nuclear@1: 
nuclear@1: 	if(bnstate[0]) {
nuclear@1: 		float fdx = dx / (float)win_width;
nuclear@1: 		float fdy = dy / (float)win_height / win_aspect;
nuclear@1: 
nuclear@1: 		if(show_thumb) {
nuclear@1: 			show_pan_x += fdx / show_zoom;
nuclear@1: 			show_pan_y += fdy / show_zoom;
nuclear@1: 		} else {
nuclear@1: 			pan_x += fdx;
nuclear@1: 			pan_y += fdy;
nuclear@1: 		}
nuclear@1: 		glutPostRedisplay();
nuclear@1: 	}
nuclear@1: 
nuclear@1: 	if(bnstate[2]) {
nuclear@1: 		if(show_thumb) {
nuclear@1: 			show_zoom -= dy * 0.0075;
nuclear@1: 			if(show_zoom <= 0) show_zoom = 0;
nuclear@1: 		} else {
nuclear@1: 			thumbs_size -= dy * 0.005;
nuclear@1: 			if(thumbs_size <= 0.01) thumbs_size = 0.01;
nuclear@1: 		}
nuclear@1: 		glutPostRedisplay();
nuclear@1: 	}
nuclear@1: }
nuclear@1: 
nuclear@1: static struct thumbnail *find_thumb(int x, int y)
nuclear@1: {
nuclear@1: 	float fx = (float)x / (float)win_width;
nuclear@1: 	float fy = (float)y / (float)win_height / win_aspect;
nuclear@1: 	struct thumbnail *node;
nuclear@1: 
nuclear@1: 	node = thumbs;
nuclear@1: 	while(node) {
nuclear@1: 		float nx = node->layout_pos[0];
nuclear@1: 		float ny = node->layout_pos[1];
nuclear@1: 
nuclear@1: 		if(fx >= nx && fx < nx + node->layout_size[0] &&
nuclear@1: 				fy >= ny && fy < ny + node->layout_size[1]) {
nuclear@1: 			return node;
nuclear@1: 		}
nuclear@1: 		node = node->next;
nuclear@1: 	}
nuclear@1: 	return 0;
nuclear@1: }