Added C implementation (incomplete)

pixelnuke/canvas.h

@@ -0,0 +1,24 @@
+#ifndef CANVAS_H_
+#define CANVAS_H_
+
+// Open the canvas window and start the gui loop (in a separate thread)
+void canvas_start(unsigned int texSize, void (*on_close)());
+
+void canvas_setcb_key(void (*on_key)(int key, int scancode, int mods));
+void canvas_setcb_resize(void (*on_resize)());
+
+// Close the canvas window and free any resources and contexts
+void canvas_close();
+
+void canvas_fullscreen(int display);
+int canvas_get_display();
+
+void canvas_set_px(unsigned int x, unsigned int y, unsigned int rgba);
+void canvas_get_px(unsigned int x, unsigned int y, unsigned int *rgba);
+
+// get the current visible canvas size in pixel.
+// The actual window might be bigger if scaling is enabled.
+void canvas_get_size(unsigned int *width, unsigned int *height);
+
+
+#endif /* CANVAS_H_ */