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#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <GL/glut.h>
#include "display.h"
#include "typedef.h"
#define MAX(x, y) (((x) > (y)) ? (x) : (y))
extern unsigned char *cam_data;
unsigned char WIDTH = 1;
unsigned char HEIGHT = 1;
GLubyte pixels[BUF_CAP] = {0};
void pixel(int x, int y, char *buf)
{
int p = (y*WIDTH + x)*3;
int b = ((HEIGHT-1-y)*WIDTH+x)*3;
pixels[p+0] = buf[b+0];
pixels[p+1] = buf[b+1];
pixels[p+2] = buf[b+2];
}
void render()
{
WIDTH = MAX(cam_data[0], 1);
HEIGHT = MAX(cam_data[1], 1);
for(int i = 0; i < HEIGHT; i++)
for(int j = 0; j < WIDTH; j++)
pixel(j, i, &(cam_data[2]));
glClear(GL_COLOR_BUFFER_BIT);
glDrawPixels(WIDTH, HEIGHT, GL_RGB, GL_UNSIGNED_BYTE, pixels);
glutSwapBuffers();
glutReshapeWindow(WIDTH, HEIGHT);
glutPostRedisplay();
}
void display(int *argc, char **argv)
{
glutInit(argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB);
glutInitWindowSize(69, 69);
glutCreateWindow(argv[0]);
glutDisplayFunc(render);
glutMainLoop();
}
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