Render System:
:OpenGL ES 2.0:
Hi, I am doing an Android port of my project using Ogre 1.12.11. I have added RTSS to the scene manager in order to get material scripts to compile under GL ES. In one particular mesh that use material with alpha channel, the script failed to compile with the following error:
E/OGRE: Program 'ccd77c2b4d566d088768d7ba9ee68733_FS' is not supported: 'ccd77c2b4d566d088768d7ba9ee68733_FS' ERROR: 17:20: 'switch' : Illegal use of reserved word
ERROR: 17:20: 'switch' : syntax error
E/OGRE: Error: RTSS - creating GpuPrograms for pass 0 of 'Plant/OakA' failed
A/libc: /buildbot/src/android/ndk-release-r21/external/libcxx/../../external/libcxxabi/src/abort_message.cpp:72: abort_message: assertion "terminating with uncaught exception of type Ogre::RuntimeAssertionException: RuntimeAssertionException: gpu program could not be created in createGpuPrograms at ogre-1.12.11/Components/RTShaderSystem/src/OgreShaderProgramManager.cpp (line 259)" failed
Fatal signal 6 (SIGABRT), code -1 (SI_QUEUE) in tid 6278 (pperstudio.gtd3), pid 6248 (pperstudio.gtd3)
On debugging the Ogre::RTShader::ProgramManager, I found that the generated script 'ccd77c2b4d566d088768d7ba9ee68733_FS':
#version 100
precision highp float;
precision highp int;
//-----------------------------------------------------------------------------
// Program Type: Fragment shader
// Language: glsles
// Created by Ogre RT Shader Generator. All rights reserved.
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// PROGRAM DEPENDENCIES
//-----------------------------------------------------------------------------
#include <OgreUnifiedShader.h>
#include "SGXLib_PerPixelLighting.glsl"
#include "FFPLib_Common.glsl"
#include "FFPLib_Texturing.glsl"
#include "FFPLib_AlphaTest.glsl"
compiled using the language 'glsles' include an alpha test GLSL script that has an Alpha_Func using the 'switch' keyword:
bool Alpha_Func(in int func, in float alphaRef, in float alphaValue)
bool result = true;
switch (func)
case 0:// - CMPF_ALWAYS_FAIL,
result = false;
break;
case 1: //- CMPF_ALWAYS_PASS,
result = true;
break;
case 2: //- CMPF_LESS,
result = alphaValue < alphaRef;
break;
case 3: //- CMPF_LESS_EQUAL,
result = alphaValue <= alphaRef;
break;
case 4: //- CMPF_EQUAL,
result = alphaValue == alphaRef;
break;
case 5: //- CMPF_NOT_EQUAL,
result = alphaValue != alphaRef;
break;
case 6: //- CMPF_GREATER_EQUAL,
result = alphaValue >= alphaRef;
break;
case 7: //- CMPF_GREATER
result = alphaValue > alphaRef;
break;
return result;
I workaround the problem by using the if-else if statements:
if (func == 0) // - CMPF_ALWAYS_FAIL,
result = false;
else if (func == 1) //- CMPF_ALWAYS_PASS,
result = true;
else if (func == 2) //- CMPF_LESS,
result = alphaValue < alphaRef;
else if (func == 3) //- CMPF_LESS_EQUAL,
result = alphaValue <= alphaRef;
else if (func == 4) //- CMPF_EQUAL,
result = alphaValue == alphaRef;
else if (func == 5) //- CMPF_NOT_EQUAL,
result = alphaValue != alphaRef;
else if (func == 6) //- CMPF_GREATER_EQUAL,
result = alphaValue >= alphaRef;
else if (func == 7) //- CMPF_GREATER
result = alphaValue > alphaRef;
This problem doesn't exist when using the Open GL render system where the RTShader is not required to be added to the scene manager.
