Add sdl_renderer:get_viewport/1

2 files changed, 30 insertions, 0 deletions

diff --git a/c_src/esdl2.h b/c_src/esdl2.h
index d75caf3..6648e7e 100644
--- a/c_src/esdl2.h
+++ b/c_src/esdl2.h
@@ -184,6 +184,7 @@
 	F(render_get_clip_rect, 1) \
 	F(render_get_logical_size, 1) \
 	F(render_get_scale, 1) \
+	F(render_get_viewport, 1) \
 	F(render_present, 1) \
 	F(render_set_logical_size, 3) \
 	F(set_render_draw_color, 5) \
diff --git a/c_src/sdl_renderer.c b/c_src/sdl_renderer.c
index 32a4928..483b60b 100644
--- a/c_src/sdl_renderer.c
+++ b/c_src/sdl_renderer.c
@@ -711,6 +711,35 @@ NIF_FUNCTION(render_get_scale)
 		NIF_RES_GET(Renderer, renderer_res));
 }
 
+// render_get_viewport
+
+NIF_CALL_HANDLER(thread_render_get_viewport)
+{
+	SDL_Rect rect;
+	ERL_NIF_TERM map;
+
+	SDL_RenderGetViewport(args[0], &rect);
+
+	map = enif_make_new_map(env);
+
+	enif_make_map_put(env, map, atom_x, enif_make_int(env, rect.x), &map);
+	enif_make_map_put(env, map, atom_y, enif_make_int(env, rect.y), &map);
+	enif_make_map_put(env, map, atom_w, enif_make_int(env, rect.w), &map);
+	enif_make_map_put(env, map, atom_h, enif_make_int(env, rect.h), &map);
+
+	return map;
+}
+
+NIF_FUNCTION(render_get_viewport)
+{
+	void* renderer_res;
+
+	BADARG_IF(!enif_get_resource(env, argv[0], res_Renderer, &renderer_res));
+
+	return nif_thread_call(env, thread_render_get_viewport, 1,
+		NIF_RES_GET(Renderer, renderer_res));
+}
+
 // render_present
 
 NIF_CAST_HANDLER(thread_render_present)