From 66c883b75b4c5258813400a8f23405350931a5f8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lo=C3=AFc=20Hoguin?= <essen@ninenines.eu>
Date: Mon, 7 Apr 2014 13:44:52 +0200
Subject: Add sdl_renderer:get_viewport/1

---
 c_src/esdl2.h        |  1 +
 c_src/sdl_renderer.c | 29 +++++++++++++++++++++++++++++
 src/esdl2.erl        |  4 ++++
 src/sdl_renderer.erl |  5 +++++
 4 files changed, 39 insertions(+)

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)
diff --git a/src/esdl2.erl b/src/esdl2.erl
index b5491f6..2fe78f2 100644
--- a/src/esdl2.erl
+++ b/src/esdl2.erl
@@ -72,6 +72,7 @@
 -export([render_get_clip_rect/1]).
 -export([render_get_logical_size/1]).
 -export([render_get_scale/1]).
+-export([render_get_viewport/1]).
 -export([render_present/1]).
 -export([render_set_logical_size/3]).
 -export([set_render_draw_color/5]).
@@ -277,6 +278,9 @@ render_get_logical_size(_) ->
 render_get_scale(_) ->
 	erlang:nif_error({not_loaded, ?MODULE}).
 
+render_get_viewport(_) ->
+	erlang:nif_error({not_loaded, ?MODULE}).
+
 render_present(_) ->
 	erlang:nif_error({not_loaded, ?MODULE}).
 
diff --git a/src/sdl_renderer.erl b/src/sdl_renderer.erl
index f31ea3e..7de570f 100644
--- a/src/sdl_renderer.erl
+++ b/src/sdl_renderer.erl
@@ -38,6 +38,7 @@
 -export([get_clip_rect/1]).
 -export([get_logical_size/1]).
 -export([get_scale/1]).
+-export([get_viewport/1]).
 -export([present/1]).
 -export([set_draw_color/5]).
 -export([set_logical_size/3]).
@@ -143,6 +144,10 @@ get_scale(Renderer) ->
 	esdl2:render_get_scale(Renderer),
 	receive {'_nif_thread_ret_', Ret} -> Ret end.
 
+get_viewport(Renderer) ->
+	esdl2:render_get_viewport(Renderer),
+	receive {'_nif_thread_ret_', Ret} -> Ret end.
+
 present(Renderer) ->
 	esdl2:render_present(Renderer).
 
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