Merge branch 'master' of https://collaborating.tuhh.de/cev7691/mandelbrot-zoom

1 files changed, 99 insertions, 0 deletions

diff --git a/src/render_cpu.c b/src/render_cpu.c
new file mode 100644
index 0000000..5065d4d
--- /dev/null
+++ b/src/render_cpu.c
@@ -0,0 +1,99 @@
+/*
+ * 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();
+}