ENH: add native cython and cffi API mode

Author: mattip

c_from_python.ipynb

@@ -1,13 +1,6 @@
-int mandel(float x, float y, int max_iters, unsigned char * val);
+#include "create_fractal.h"
 
-typedef struct _Img{
-    int width;
-    int height;
-    unsigned char * data;
-} Img;
-
-
-void create_fractal(Img img,  int iters) {
+int create_fractal(Img img,  int iters) {
     float pixel_size_x = 3.0 / img.width;
     float pixel_size_y = 2.0 / img.height;
     int x, y;

create_fractal.c

@@ -2,10 +2,10 @@ typedef struct _Img{
     int width;
     int height;
     unsigned char * data;
-} cImg;
+} Img;
 
 
 
-int create_fractal(cImg img, int iters);
+int create_fractal(Img img, int iters);
 int mandel(float real, float imag, int max_iters, unsigned char * val);
 

create_fractal.h

@@ -26,7 +26,7 @@ int main(int argc, const char *argv[], const char * env[])
     int height = 1000;
     int iters = 20;
     FILE * fid = NULL;
-    cImg img;
+    Img img;
     size_t written;
 #ifdef CLOCK_PROCESS_CPUTIME_ID
     struct timespec vartime;