Automatic shader precision management

src/Materials/babylon.effect.js

@@ -223,14 +223,28 @@ var BABYLON;
             }
             callback(returnValue);
         };
+        Effect.prototype._processPrecision = function (source) {
+            if (source.indexOf("precision highp float") === -1) {
+                if (!this._engine.getCaps().highPrecisionShaderSupported) {
+                    source = "precision mediump float;\n" + source;
+                }
+                else {
+                    source = "precision highp float;\n" + source;
+                }
+            }
+            else {
+                if (!this._engine.getCaps().highPrecisionShaderSupported) {
+                    source = source.replace("precision highp float", "precision mediump float");
+                }
+            }
+            return source;
+        };
         Effect.prototype._prepareEffect = function (vertexSourceCode, fragmentSourceCode, attributesNames, defines, fallbacks) {
             try {
                 var engine = this._engine;
                 // Precision
-                if (!engine.getCaps().highPrecisionShaderSupported) {
-                    vertexSourceCode = vertexSourceCode.replace("precision highp float", "precision mediump float");
-                    fragmentSourceCode = fragmentSourceCode.replace("precision highp float", "precision mediump float");
-                }
+                vertexSourceCode = this._processPrecision(vertexSourceCode);
+                fragmentSourceCode = this._processPrecision(fragmentSourceCode);
                 this._program = engine.createShaderProgram(vertexSourceCode, fragmentSourceCode, defines);
                 this._uniforms = engine.getUniforms(this._program, this._uniformsNames);
                 this._attributes = engine.getAttributes(this._program, attributesNames);

src/Materials/babylon.effect.ts

@@ -281,16 +281,30 @@
             callback(returnValue);
         }
 
+        private _processPrecision(source: string): string {
+            if (source.indexOf("precision highp float") === -1) {
+                if (!this._engine.getCaps().highPrecisionShaderSupported) {
+                    source = "precision mediump float;\n" + source;
+                } else {
+                    source = "precision highp float;\n" + source;
+                }
+            } else {
+                if (!this._engine.getCaps().highPrecisionShaderSupported) { // Moving highp to mediump
+                    source = source.replace("precision highp float", "precision mediump float");
+                }
+            }
+
+            return source;
+        }
+
         private _prepareEffect(vertexSourceCode: string, fragmentSourceCode: string, attributesNames: string[], defines: string, fallbacks?: EffectFallbacks): void {
             try {
                 var engine = this._engine;
 
                 // Precision
-                if (!engine.getCaps().highPrecisionShaderSupported) { // Moving highp to mediump
-                    vertexSourceCode = vertexSourceCode.replace("precision highp float", "precision mediump float");
-                    fragmentSourceCode = fragmentSourceCode.replace("precision highp float", "precision mediump float");
-                }
-
+                vertexSourceCode = this._processPrecision(vertexSourceCode);
+                fragmentSourceCode = this._processPrecision(fragmentSourceCode);
+                
                 this._program = engine.createShaderProgram(vertexSourceCode, fragmentSourceCode, defines);
 
                 this._uniforms = engine.getUniforms(this._program, this._uniformsNames);

src/Shaders/anaglyph.fragment.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-// Samplers
+// Samplers
 varying vec2 vUV;
 uniform sampler2D textureSampler;
 uniform sampler2D leftSampler;

src/Shaders/blackAndWhite.fragment.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-// Samplers
+// Samplers
 varying vec2 vUV;
 uniform sampler2D textureSampler;
 

src/Shaders/blur.fragment.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-// Samplers
+// Samplers
 varying vec2 vUV;
 uniform sampler2D textureSampler;
 

src/Shaders/chromaticAberration.fragment.fx

@@ -1,5 +1,3 @@
-precision highp float;
-
 // samplers
 uniform sampler2D textureSampler;	// original color
 

src/Shaders/color.fragment.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-uniform vec4 color;
+uniform vec4 color;
 
 void main(void) {
 	gl_FragColor = color;

src/Shaders/color.vertex.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-// Attributes
+// Attributes
 attribute vec3 position;
 
 // Uniforms

src/Shaders/colorCorrection.fragment.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-// samplers
+// samplers
 uniform sampler2D textureSampler;	// screen render
 uniform sampler2D colorTable;		// color table with modified colors
 

src/Shaders/convolution.fragment.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-// Samplers
+// Samplers
 varying vec2 vUV;
 uniform sampler2D textureSampler;
 

src/Shaders/default.fragment.fx

@@ -6,8 +6,6 @@
 #extension GL_EXT_frag_depth : enable
 #endif
 
-precision highp float;
-
 // Constants
 #define RECIPROCAL_PI2 0.15915494
 

src/Shaders/default.vertex.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-// Attributes
+// Attributes
 attribute vec3 position;
 #ifdef NORMAL
 attribute vec3 normal;

src/Shaders/depth.fragment.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-#ifdef ALPHATEST
+#ifdef ALPHATEST
 varying vec2 vUV;
 uniform sampler2D diffuseSampler;
 #endif

src/Shaders/depth.vertex.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-// Attribute
+// Attribute
 attribute vec3 position;
 #include<bonesDeclaration>
 

src/Shaders/depthBoxBlur.fragment.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-// Samplers
+// Samplers
 varying vec2 vUV;
 uniform sampler2D textureSampler;
 

src/Shaders/depthOfField.fragment.fx

@@ -3,9 +3,6 @@
 // Does depth-of-field blur, edge blur
 // Inspired by Francois Tarlier & Martins Upitis
 
-precision highp float;
-
-
 // samplers
 uniform sampler2D textureSampler;
 uniform sampler2D highlightsSampler;

src/Shaders/displayPass.fragment.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-// Samplers
+// Samplers
 varying vec2 vUV;
 uniform sampler2D textureSampler;
 uniform sampler2D passSampler;

src/Shaders/filter.fragment.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-// Samplers
+// Samplers
 varying vec2 vUV;
 uniform sampler2D textureSampler;
 

src/Shaders/fxaa.fragment.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-#define FXAA_REDUCE_MIN   (1.0/128.0)
+#define FXAA_REDUCE_MIN   (1.0/128.0)
 #define FXAA_REDUCE_MUL   (1.0/8.0)
 #define FXAA_SPAN_MAX     8.0
 

src/Shaders/hdr.fragment.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-uniform sampler2D textureSampler;
+uniform sampler2D textureSampler;
 varying vec2 vUV;
 
 #if defined(GAUSSIAN_BLUR_H) || defined(GAUSSIAN_BLUR_V)

src/Shaders/layer.fragment.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-// Samplers
+// Samplers
 varying vec2 vUV;
 uniform sampler2D textureSampler;
 

src/Shaders/layer.vertex.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-// Attributes
+// Attributes
 attribute vec2 position;
 
 // Uniforms

src/Shaders/legacydefault.fragment.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-#define MAP_PROJECTION	4.
+#define MAP_PROJECTION	4.
 
 // Constants
 uniform vec3 vEyePosition;

src/Shaders/legacydefault.vertex.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-// Attributes
+// Attributes
 attribute vec3 position;
 attribute vec3 normal;
 #ifdef UV1

src/Shaders/lensFlare.fragment.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-// Samplers
+// Samplers
 varying vec2 vUV;
 uniform sampler2D textureSampler;
 

src/Shaders/lensFlare.vertex.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-// Attributes
+// Attributes
 attribute vec2 position;
 
 // Uniforms

src/Shaders/lensHighlights.fragment.fx

@@ -1,5 +1,3 @@
-precision highp float;
-
 // samplers
 uniform sampler2D textureSampler;	// original color
 

src/Shaders/line.fragment.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-uniform vec4 color;
+uniform vec4 color;
 
 void main(void) {
 	gl_FragColor = color;

src/Shaders/line.vertex.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-// Attributes
+// Attributes
 attribute vec3 position;
 attribute vec4 normal;
 

src/Shaders/outline.fragment.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-uniform vec4 color;
+uniform vec4 color;
 
 #ifdef ALPHATEST
 varying vec2 vUV;

src/Shaders/outline.vertex.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-// Attribute
+// Attribute
 attribute vec3 position;
 attribute vec3 normal;
 

src/Shaders/particles.fragment.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-// Samplers
+// Samplers
 varying vec2 vUV;
 varying vec4 vColor;
 uniform vec4 textureMask;

src/Shaders/particles.vertex.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-// Attributes
+// Attributes
 attribute vec3 position;
 attribute vec4 color;
 attribute vec4 options;

src/Shaders/pass.fragment.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-// Samplers
+// Samplers
 varying vec2 vUV;
 uniform sampler2D textureSampler;
 

src/Shaders/postprocess.vertex.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-// Attributes
+// Attributes
 attribute vec2 position;
 
 // Output

src/Shaders/procedural.vertex.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-// Attributes
+// Attributes
 attribute vec2 position;
 
 // Output

src/Shaders/refraction.fragment.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-// Samplers
+// Samplers
 varying vec2 vUV;
 uniform sampler2D textureSampler;
 uniform sampler2D refractionSampler;

src/Shaders/shadowMap.fragment.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-vec4 pack(float depth)
+vec4 pack(float depth)
 {
 	const vec4 bit_shift = vec4(255.0 * 255.0 * 255.0, 255.0 * 255.0, 255.0, 1.0);
 	const vec4 bit_mask = vec4(0.0, 1.0 / 255.0, 1.0 / 255.0, 1.0 / 255.0);

src/Shaders/shadowMap.vertex.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-// Attribute
+// Attribute
 attribute vec3 position;
 
 #include<bonesDeclaration>

src/Shaders/sprites.fragment.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-uniform bool alphaTest;
+uniform bool alphaTest;
 
 varying vec4 vColor;
 

src/Shaders/sprites.vertex.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-// Attributes
+// Attributes
 attribute vec4 position;
 attribute vec4 options;
 attribute vec4 cellInfo;

src/Shaders/ssao.fragment.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-uniform sampler2D textureSampler;
+uniform sampler2D textureSampler;
 uniform sampler2D randomSampler;
 
 uniform float randTextureTiles;

src/Shaders/ssaoCombine.fragment.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-uniform sampler2D textureSampler;
+uniform sampler2D textureSampler;
 uniform sampler2D originalColor;
 
 varying vec2 vUV;

src/Shaders/stereoscopicInterlace.fragment.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-const vec3 TWO = vec3(2.0, 2.0, 2.0);
+const vec3 TWO = vec3(2.0, 2.0, 2.0);
 
 varying vec2 vUV;
 uniform sampler2D camASampler;

src/Shaders/tonemap.fragment.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-// Samplers
+// Samplers
 varying vec2 vUV;
 uniform sampler2D textureSampler;
 

src/Shaders/volumetricLightScattering.fragment.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-uniform sampler2D textureSampler;
+uniform sampler2D textureSampler;
 uniform sampler2D lightScatteringSampler;
 
 uniform float decay;

src/Shaders/volumetricLightScatteringPass.fragment.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-#if defined(ALPHATEST) || defined(NEED_UV)
+#if defined(ALPHATEST) || defined(NEED_UV)
 varying vec2 vUV;
 #endif
 

src/Shaders/vrDistortionCorrection.fragment.fx

@@ -1,6 +1,4 @@
-precision highp float;
-
-// Samplers
+// Samplers
 varying vec2 vUV;
 uniform sampler2D textureSampler;
 uniform vec2 LensCenter;