Adding ViroKit. Needs AWSCore :(

mobile/ios/ViroKit.framework/Headers/VROViewport.h

@@ -0,0 +1,102 @@
+//
+//  VROViewport.h
+//  ViroRenderer
+//
+//  Created by Raj Advani on 10/23/15.
+//  Copyright © 2015 Viro Media. All rights reserved.
+//
+
+#ifndef VROViewport_hpp
+#define VROViewport_hpp
+
+#include "VRODefines.h"
+#include "VROMatrix4f.h"
+#include "VROMath.h"
+
+#if VRO_METAL
+#include <MetalKit/MetalKit.h>
+#endif
+
+class VROViewport {
+    
+public:
+    
+    VROViewport() :
+        _x(0), _y(0), _width(0), _height(0), _contentScaleFactor(2)
+    {}
+
+    VROViewport(int x, int y, int width, int height) :
+        _x(x), _y(y), _width(width), _height(height), _contentScaleFactor(2)
+    {}
+ 
+    int getX() const { return _x; }
+    int getY() const { return _y; }
+    int getWidth() const { return _width; }
+    int getHeight() const { return _height; }
+    
+    /*
+     On some platforms, there is a difference between screen pixels and
+     screen points (e.g. on iOS Retina displays). Viewports are always
+     specified in pixels: to get points, divide by the contentScaleFactor.
+     */
+    float getContentScaleFactor() const { return _contentScaleFactor; };
+    
+    VROMatrix4f getOrthographicProjection(float near, float far) {
+        float left   = _x;
+        float right  = _x + _width;
+        float bottom = _y;
+        float top    = _y + _height;
+        
+        return VROMathComputeOrthographicProjection(left, right, bottom, top, near, far);
+    }
+    
+    void setViewport(int x, int y, int width, int height) {
+        _x = x;
+        _y = y;
+        _width = width;
+        _height = height;
+    }
+    
+    void setContentScaleFactor(float factor) {
+        _contentScaleFactor = factor;
+    }
+    
+#if VRO_METAL
+    MTLViewport toMetalViewport() const {
+        MTLViewport viewport;
+        viewport.originX = _x;
+        viewport.originY = _y;
+        viewport.width   = _width;
+        viewport.height  = _height;
+        viewport.znear   = 0.0;
+        viewport.zfar    = 1.0;
+        
+        return viewport;
+    }
+    
+    MTLScissorRect toMetalScissor() const {
+        MTLScissorRect scissor;
+        scissor.x = _x;
+        scissor.y = _y;
+        scissor.width = _width;
+        scissor.height = _height;
+        
+        return scissor;
+    }
+#endif
+    
+    void toArray(int *viewport) const {
+        viewport[0] = _x;
+        viewport[1] = _y;
+        viewport[2] = _width;
+        viewport[3] = _height;
+    }
+    
+private:
+    
+    int _x, _y, _width, _height;
+    float _contentScaleFactor;
+    
+};
+
+#endif /* VROViewport_hpp */