HDR Rendering

Source/Renderer/AutomaticUniforms.js

@@ -1686,6 +1686,34 @@ define([
             getValue : function(uniformState) {
                 return uniformState.invertClassificationColor;
             }
+        }),
+
+        /**
+         * An automatic GLSL uniform that is used for gamma correction.
+         *
+         * @alias czm_gamma
+         * @glslUniform
+         */
+        czm_gamma : new AutomaticUniform({
+            size : 1,
+            datatype : WebGLConstants.FLOAT,
+            getValue : function(uniformState) {
+                return uniformState.gamma;
+            }
+        }),
+
+        /**
+         * An automatic GLSL uniform that defines the color of light emitted by the sun.
+         *
+         * @alias czm_sunColor
+         * @glslUniform
+         */
+        czm_sunColor: new AutomaticUniform({
+            size: 1,
+            datatype: WebGLConstants.FLOAT_VEC4,
+            getValue: function(uniformState) {
+                return uniformState.sunColor;
+            }
         })
     };
 

Source/Renderer/UniformState.js

@@ -46,6 +46,10 @@ define([
          * @type {Texture}
          */
         this.globeDepthTexture = undefined;
+        /**
+         * @type {Number}
+         */
+        this.gamma = undefined;
 
         this._viewport = new BoundingRectangle();
         this._viewportCartesian4 = new Cartesian4();
@@ -143,6 +147,7 @@ define([
         this._sunPositionColumbusView = new Cartesian3();
         this._sunDirectionWC = new Cartesian3();
         this._sunDirectionEC = new Cartesian3();
+        this._sunColor = new Color();
         this._moonDirectionEC = new Cartesian3();
 
         this._pass = undefined;
@@ -737,6 +742,17 @@ define([
             }
         },
 
+        /**
+         * The color of the light emitted by the sun.
+         * @memberof UniformState.prototype
+         * @type {Color}
+         */
+        sunColor: {
+            get: function() {
+                return this._sunColor;
+            }
+        },
+
         /**
          * A normalized vector to the moon in eye coordinates at the current scene time.  In 3D mode, this
          * returns the actual vector from the camera position to the moon position.  In 2D and Columbus View, it returns
@@ -1069,6 +1085,7 @@ define([
         }
 
         setSunAndMoonDirections(this, frameState);
+        this._sunColor = Color.clone(frameState.sunColor, this._sunColor);
 
         var brdfLutGenerator = frameState.brdfLutGenerator;
         var brdfLut = defined(brdfLutGenerator) ? brdfLutGenerator.colorTexture : undefined;