Mandelbrot drawing possible

1 files changed, 72 insertions, 0 deletions

diff --git a/src/render.c b/src/render.c
new file mode 100644
index 0000000..e06c967
--- /dev/null
+++ b/src/render.c
@@ -0,0 +1,72 @@
+/*
+ * render.c
+ *
+ *  Created on: 15.01.2018
+ *      Author: Superleo1810
+ */
+
+#include "render.h"
+
+void render_init(Config *config, u32 (*sfunc) (double, double, u32))
+{
+	_config = config;
+	_sfunc = sfunc;
+
+	ui_render.window = GTK_WINDOW(gtk_window_new(GTK_WINDOW_TOPLEVEL));
+	gtk_window_set_default_size(ui_render.window, config->width, config->height);
+
+	ui_render.frame = GTK_FRAME(gtk_frame_new(NULL));
+	gtk_container_add(GTK_CONTAINER(ui_render.window), ui_render.frame);
+
+	ui_render.drawing_area = GTK_DRAWING_AREA(gtk_drawing_area_new());
+	gtk_widget_set_size_request(GTK_WIDGET(ui_render.drawing_area), config->width, config->height);
+	g_signal_connect(G_OBJECT(ui_render.drawing_area), "draw", G_CALLBACK(on_draw), NULL);
+	gtk_container_add(GTK_CONTAINER(ui_render.frame), ui_render.drawing_area);
+
+}
+
+void render_show()
+{
+	gtk_widget_show_all(GTK_WIDGET(ui_render.window));
+}
+
+void on_draw(GtkWidget *widget, cairo_t *cr, gpointer data)
+{
+	cairo_surface_t *image;
+	// TODO: MUSS UNBEDINGT SEPARAT GECALLT WERDEN, SONST KEINE 60 FPS
+	image = render_surface();
+	cairo_set_source_surface(cr, image, 0, 0);
+	cairo_paint(cr);
+}
+
+cairo_surface_t *render_surface()
+{
+    cairo_surface_t *result;
+    unsigned char *current_row;
+    int stride;
+    double x_math, y_math;
+    u32 iterations;
+
+    result = cairo_image_surface_create(CAIRO_FORMAT_RGB24, _config->width, _config->height);
+    if (cairo_surface_status(result) != CAIRO_STATUS_SUCCESS)
+        return result;
+
+    cairo_surface_flush(result);
+    current_row = cairo_image_surface_get_data(result);
+    stride = cairo_image_surface_get_stride(result);
+    for (int y = 0; y < _config->height; y++) {
+        u32 *row = (void *) current_row;
+        for (int x = 0; x < _config->width; x++) {
+        	x_math = /*x_MIN*/-2.0 + ((double) x * (/*x_MAX*/1.0 - /*x_MIN*/-2.0)) / _config->width;
+        	y_math = /*y_MIN*/-1.0 + ((double) (_config->height - y) * (/*y_MAX*/1.0 - /*y_MIN*/-1.0)) / _config->height;
+        	iterations = _sfunc(x_math, y_math, _config->iterations);
+            row[x] = (((1<<24)-1)*iterations)/_config->iterations;
+//            if (iterations > 1<<8)
+//            	printf("schon gruen\n");
+        }
+
+        current_row += stride;
+    }
+    cairo_surface_mark_dirty(result);
+    return result;
+}