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/*
* render.c
*
* Created on: 15.01.2018
* Author: Superleo1810
*/
#include "render_cpu.h"
#define HAVE_STRUCT_TIMESPEC
void init_cpu(CpuConfig *config)
{
config_cpu = config;
x_min_s = -2.0;
x_max_s = 1.0;
y_min_s = -1.0;
y_max_s = 1.0;
x_min = x_min_s;
x_max = x_max_s;
y_min = y_min_s;
y_max = y_max_s;
calculate(x_min, y_min, x_max, y_max, config_cpu->set_func, config_cpu->arr);
}
void render_cpu(void)
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glBindTexture(GL_TEXTURE_2D, config_cpu->tex);
glEnable(GL_TEXTURE_2D);
glBegin(GL_QUADS);
glTexCoord2i(0, 0); glVertex2i(0, 0);
glTexCoord2i(0, 1); glVertex2i(0, config_cpu->height);
glTexCoord2i(1, 1); glVertex2i(config_cpu->width, config_cpu->height);
glTexCoord2i(1, 0); glVertex2i(config_cpu->width, 0);
glEnd();
glDisable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, 0);
glutSwapBuffers();
}
void calculate(d64 x_min, d64 y_min, d64 x_max, d64 y_max, u32 (*sfunc) (d64, d64, u32), u32 *arr)
{
pthread_t thread;
ThreadArgs *args = (ThreadArgs *) malloc(config_cpu->threads * sizeof(ThreadArgs));
for(u8 i = 0; i < config_cpu->threads; i++)
{
args[i] = (ThreadArgs) { .tc = config_cpu->threads, .tid = i, .x_min = x_min, .y_min = y_min, .x_max = x_max, .y_max = y_max, .sfunc = sfunc, .arr = arr };
pthread_create(&thread, NULL, calculate_t, (void *)&args[i]);
}
pthread_join(thread, NULL);
free(args);
}
void calculate_t(void *args)
{
ThreadArgs *_args = (ThreadArgs *)args;
d64 x_math, y_math;
u32 iterations;
for (u32 y = (config_cpu->height/_args->tc)*(_args->tid); y < config_cpu->height; y++)
{
for (u32 x = 0; x < config_cpu->width; x++)
{
x_math = _args->x_min + ((d64) x * (_args->x_max - _args->x_min)) / config_cpu->width;
y_math = _args->y_min + ((d64) (config_cpu->height - y) * (_args->y_max - _args->y_min)) / config_cpu->height;
iterations = _args->sfunc(x_math, y_math, config_cpu->iterations);
_args->arr[COORDS(x, y, config_cpu->width)] = (((1<<24)-1)*iterations)/config_cpu->iterations;
}
}
}
void idle_cpu(void)
{
static int t_old;
int t = 0, delta = 0;
do
{
t = glutGet(GLUT_ELAPSED_TIME);
delta = t - t_old;
}
while(delta < 16); // TODO: Hardcoded FPS
t_old = t;
calculate(x_min, y_min, x_max, y_max, config_cpu->set_func, config_cpu->arr);
//glGenTextures(1, &tex);
glBindTexture(GL_TEXTURE_2D, config_cpu->tex);
//glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
//glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, config_cpu->width, config_cpu->height, 0, GL_RGBA, GL_UNSIGNED_BYTE, config_cpu->arr);
glBindTexture(GL_TEXTURE_2D, 0);
ft+=(config_cpu->speed*(delta/1000.0));
x_min = x_min_s + config_cpu->zoom_func(ft, (d64)2.0 + config_cpu->to_x);
y_min = y_min_s + config_cpu->zoom_func(ft, (d64)1.0 + config_cpu->to_y);
x_max = x_max_s - config_cpu->zoom_func(ft, (d64)1.0 - config_cpu->to_x);
y_max = y_max_s - config_cpu->zoom_func(ft, (d64)1.0 - config_cpu->to_y);
glutPostRedisplay();
}
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