Add sdl_renderer:set_scale/3

2 files changed, 42 insertions, 0 deletions

diff --git a/c_src/esdl2.h b/c_src/esdl2.h
index 9ddd2d5..021d5bb 100644
--- a/c_src/esdl2.h
+++ b/c_src/esdl2.h
@@ -188,6 +188,7 @@
 	F(render_present, 1) \
 	F(render_set_clip_rect, 5) \
 	F(render_set_logical_size, 3) \
+	F(render_set_scale, 3) \
 	F(set_render_draw_color, 5) \
 	/* sdl_surface */ \
 	F(img_load, 1) \
diff --git a/c_src/sdl_renderer.c b/c_src/sdl_renderer.c
index 9d873bb..85432c2 100644
--- a/c_src/sdl_renderer.c
+++ b/c_src/sdl_renderer.c
@@ -807,6 +807,47 @@ NIF_FUNCTION(render_set_logical_size)
 		NIF_RES_GET(Renderer, renderer_res), w, h);
 }
 
+// render_set_scale
+
+NIF_CALL_HANDLER(thread_render_set_scale)
+{
+	int ret;
+
+	ret = SDL_RenderSetScale(args[0], *((double*)args[1]), *((double*)args[2]));
+
+	enif_free(args[1]);
+	enif_free(args[2]);
+
+	if (ret)
+		return sdl_error_tuple(env);
+
+	return atom_ok;
+}
+
+NIF_FUNCTION(render_set_scale)
+{
+	void* renderer_res;
+	double *scaleXPtr, *scaleYPtr;
+
+	BADARG_IF(!enif_get_resource(env, argv[0], res_Renderer, &renderer_res));
+
+	scaleXPtr = (double*)enif_alloc(sizeof(double));
+	if (!enif_get_double(env, argv[1], scaleXPtr)) {
+		enif_free(scaleXPtr);
+		return enif_make_badarg(env);
+	}
+
+	scaleYPtr = (double*)enif_alloc(sizeof(double));
+	if (!enif_get_double(env, argv[2], scaleYPtr)) {
+		enif_free(scaleXPtr);
+		enif_free(scaleYPtr);
+		return enif_make_badarg(env);
+	}
+
+	return nif_thread_call(env, thread_render_set_scale, 3,
+		NIF_RES_GET(Renderer, renderer_res), scaleXPtr, scaleYPtr);
+}
+
 // set_render_draw_color
 
 NIF_CALL_HANDLER(thread_set_render_draw_color)