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#include <sys/time.h>
#include <time.h>
#include <GL/glew.h>
#include "uniform.h"
int time_start = 0;
GLFWwindow* window = NULL;
uniforms_t * init_uniforms(GLuint shader, GLFWwindow* _window) {
window = _window;
time_start = time(NULL);
uniforms_t * uniforms = malloc(sizeof(uniforms_t));
uniforms->time = glGetUniformLocation(shader, "time");
uniforms->window = glGetUniformLocation(shader, "window");
return uniforms;
}
/** @brief update `uniform float time` */
static void update_u_time(GLuint u_time) {
struct timeval t;
gettimeofday(&t, NULL);
t.tv_sec -= time_start;
float time = t.tv_sec + (t.tv_usec / 1e6);
glUniform1f(u_time, time);
}
/** @brief update `uniform ivec2 window` */
static void update_u_window(GLuint u_window) {
int width, height;
glfwGetWindowSize(window, &width, &height);
glUniform2i(u_window, width, height);
}
void update_uniforms(uniforms_t * uniforms) {
update_u_time(uniforms->time);
update_u_window(uniforms->window);
}
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