From ffa8a7668bcff7fd95ae5cd4b971f8330efbb3f0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Konstantin=20K=C3=A4fer?= <mail@kkaefer.com>
Date: Tue, 5 Jul 2016 11:09:59 +0200
Subject: [core] store viewport and FBO binding

---
 include/mbgl/gl/gl.hpp        |  1 +
 include/mbgl/gl/gl_values.hpp | 25 +++++++++++++++++++++++++
 2 files changed, 26 insertions(+)

(limited to 'include/mbgl/gl')

diff --git a/include/mbgl/gl/gl.hpp b/include/mbgl/gl/gl.hpp
index 092166ef96..be6405c593 100644
--- a/include/mbgl/gl/gl.hpp
+++ b/include/mbgl/gl/gl.hpp
@@ -21,6 +21,7 @@
     #elif TARGET_OS_MAC
         #include <OpenGL/OpenGL.h>
         #include <OpenGL/gl.h>
+        #include <OpenGL/glext.h>
     #else
         #error Unsupported Apple platform
     #endif
diff --git a/include/mbgl/gl/gl_values.hpp b/include/mbgl/gl/gl_values.hpp
index e5ad2380d1..fa3b87c435 100644
--- a/include/mbgl/gl/gl_values.hpp
+++ b/include/mbgl/gl/gl_values.hpp
@@ -271,6 +271,31 @@ struct ActiveTexture {
     }
 };
 
+struct BindFramebuffer {
+    using Type = GLint;
+    static void Set(const Type& value) {
+        MBGL_CHECK_ERROR(glBindFramebuffer(GL_FRAMEBUFFER, value));
+    }
+    static Type Get() {
+        Type activeFBO;
+        MBGL_CHECK_ERROR(glGetIntegerv(GL_FRAMEBUFFER_BINDING, &activeFBO));
+        return activeFBO;
+    }
+};
+
+struct Viewport {
+    using Type = std::array<GLint, 4>;
+    static void Set(const Type& value) {
+        MBGL_CHECK_ERROR(glViewport(value[0], value[1], value[2], value[3]));
+    }
+    static Type Get() {
+        Type pos;
+        MBGL_CHECK_ERROR(glGetIntegerv(GL_VIEWPORT, pos.data()));
+        return pos;
+    }
+};
+
+
 #ifndef GL_ES_VERSION_2_0
 
 struct PixelZoom {
-- 
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