From e3715098dc137f776b551376c294f06a870425b6 Mon Sep 17 00:00:00 2001
From: phil <philjord@ihug.co.nz>
Date: Thu, 1 Dec 2016 19:09:53 +1300
Subject: maxVaryingVectors variable loaded into canvas3D

This is very important on low power hardware and affects shader design
---
 src/main/java/org/jogamp/java3d/Canvas3D.java         | 6 ++++++
 src/main/java/org/jogamp/java3d/Jogl2es2Pipeline.java | 6 ++++++
 2 files changed, 12 insertions(+)

(limited to 'src')

diff --git a/src/main/java/org/jogamp/java3d/Canvas3D.java b/src/main/java/org/jogamp/java3d/Canvas3D.java
index b4d5bcb..fe21197 100644
--- a/src/main/java/org/jogamp/java3d/Canvas3D.java
+++ b/src/main/java/org/jogamp/java3d/Canvas3D.java
@@ -795,6 +795,8 @@ ArrayList<Integer> textureIdResourceFreeList = new ArrayList<Integer>();
 
     // Max number of vertex attrs (not counting coord, etc.)
     int maxVertexAttrs = 0;
+    
+    int maxVaryingVectors = 0;
 
     // End of variables set by createNewContext()/createQueryContext()
 
@@ -3741,8 +3743,12 @@ ArrayList<TextureRetained> textureIDResourceTable = new ArrayList<TextureRetaine
         keys.add("textureImageUnitsCombinedMax");
         values.add(new Integer(maxCombinedTextureImageUnits));
 
+        keys.add("maxVaryingVectors");
+        values.add(new Integer(maxVaryingVectors));
+        
         keys.add("vertexAttrsMax");
         values.add(new Integer(maxVertexAttrs));
+        
 
 	keys.add("shadingLanguageGLSL");
 	values.add(new Boolean(shadingLanguageGLSL));
diff --git a/src/main/java/org/jogamp/java3d/Jogl2es2Pipeline.java b/src/main/java/org/jogamp/java3d/Jogl2es2Pipeline.java
index fa556e9..3e2ba74 100644
--- a/src/main/java/org/jogamp/java3d/Jogl2es2Pipeline.java
+++ b/src/main/java/org/jogamp/java3d/Jogl2es2Pipeline.java
@@ -7012,6 +7012,11 @@ class Jogl2es2Pipeline extends Jogl2es2DEPPipeline
 			{
 				cv.maxVertexAttrs = 0;
 			}
+			
+			//http://stackoverflow.com/questions/26682631/webgl-shaders-maximum-number-of-varying-variables
+			gl.glGetIntegerv(GL2ES2.GL_MAX_VARYING_VECTORS, tmp, 0);
+			cv.maxVaryingVectors = tmp[0];
+			
 			cv.shadingLanguageGLSL = true;
 		}
 	}
@@ -7030,6 +7035,7 @@ class Jogl2es2Pipeline extends Jogl2es2DEPPipeline
 		cv.maxVertexTextureImageUnits = 0;
 		cv.maxCombinedTextureImageUnits = 0;
 		cv.maxVertexAttrs = 0;
+		cv.maxVaryingVectors = 0;
 		cv.extensionsSupported = 0;
 		cv.textureExtendedFeatures = 0;
 		cv.textureColorTableSize = 0;
-- 
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