From 10c1fedfca71951ec55f409c5f78626b2c310cdc Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Tue, 16 May 2017 12:32:41 +0100
Subject: [PATCH] Addded a GLES2 compatible osgmovie shader

---
 examples/osgmovie/osgmovie.cpp | 36 +++++++++++++++++++++++++++++-----
 1 file changed, 31 insertions(+), 5 deletions(-)

diff --git a/examples/osgmovie/osgmovie.cpp b/examples/osgmovie/osgmovie.cpp
index 7221e6f37..0a62b37de 100644
--- a/examples/osgmovie/osgmovie.cpp
+++ b/examples/osgmovie/osgmovie.cpp
@@ -469,23 +469,46 @@ int main(int argc, char** argv)
     {
         //useTextureRectangle = false;
 
-        static const char *shaderSourceTextureRec = {
-            "uniform vec4 cutoff_color;\n"
-            "uniform samplerRect movie_texture;\n"
+        static const char *shaderSourceTextureVertex = {
+            "#ifdef GL_ES\n"
+            "    precision highp float;\n"
+            "    precision highp int;\n"
+            "#endif\n"
+            "varying vec4 texcoord;\n"
             "void main(void)\n"
             "{\n"
-            "    vec4 texture_color = textureRect(movie_texture, gl_TexCoord[0].st); \n"
+            "    texcoord = gl_MultiTexCoord0; \n"
+            "    gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;\n"
+            "}\n"
+        };
+
+        static const char *shaderSourceTextureRec = {
+            "#ifdef GL_ES\n"
+            "    precision highp float;\n"
+            "    precision highp int;\n"
+            "#endif\n"
+            "uniform vec4 cutoff_color;\n"
+            "uniform samplerRect movie_texture;\n"
+            "varying vec4 texcoord;\n"
+            "void main(void)\n"
+            "{\n"
+            "    vec4 texture_color = textureRect(movie_texture, texcoord.st); \n"
             "    if (all(lessThanEqual(texture_color,cutoff_color))) discard; \n"
             "    gl_FragColor = texture_color;\n"
             "}\n"
         };
 
         static const char *shaderSourceTexture2D = {
+            "#ifdef GL_ES\n"
+            "    precision highp float;\n"
+            "    precision highp int;\n"
+            "#endif\n"
             "uniform vec4 cutoff_color;\n"
             "uniform sampler2D movie_texture;\n"
+            "varying vec4 texcoord;\n"
             "void main(void)\n"
             "{\n"
-            "    vec4 texture_color = texture2D(movie_texture, gl_TexCoord[0].st); \n"
+            "    vec4 texture_color = texture2D(movie_texture, texcoord.st); \n"
             "    if (all(lessThanEqual(texture_color,cutoff_color))) discard; \n"
             "    gl_FragColor = texture_color;\n"
             "}\n"
@@ -493,6 +516,9 @@ int main(int argc, char** argv)
 
         osg::Program* program = new osg::Program;
 
+
+        program->addShader(new osg::Shader(osg::Shader::VERTEX, shaderSourceTextureVertex));
+
         program->addShader(new osg::Shader(osg::Shader::FRAGMENT,
                                            useTextureRectangle ? shaderSourceTextureRec : shaderSourceTexture2D));