[SOLVED] glGetUniformLocation invalid_value on Android

cocos2d-x C++
#1

Hey,

I’ve tried to get the uniform locations from my fragment shader uniform trhough glGetUniformLocation

in my fragment shader

uniform float u_fl;

.cpp

auto glp = new GLProgram();
glp->autorelease();

if (!glp->initWithFilenames("vertex.vsh", "fragment.fsh")) { DEBUG_BREAK; }

    .....  glp->bind attribs etc.....

    glp->link();
    glp->updateUniforms();

	GLProgramState* glprogramstate = GLProgramState::getOrCreateWithGLProgram(glp);
    setGLProgramState(glprogramstate);

    auto u_loc = glGetUniformLocation(glp->getProgram(), "u_fl");
 //or 
      auto a = glp->getUniformLocation("u_fl");

    ls->setGLProgram(glp);

but it always returns -1 and the errorcode GL_INVALID_VALUE.

It does work on Windows though, does anyone know if I miss anything special from the OpenGL ES version?

#2

Ok I’ve done some more detailed Debugging now, and found the issue inside my shader, it was interesting that it worked on Windows GLSL though. Main reason why i didn’t see this upfront was, because my CCLOG seems to be bugging, because i can’t see any error Output and thought everything is just fine….

#3

To help others who may have same issue would you be willing to post exact change you made?
(or even before/after shader code) Thx.

#4

Yeah the main issue was acutally me just not seeing the Output from CCLOG, therefore I had to manually read the GL Errors, which then where Pretty obvious issues. I’ve wrongly made some variables const and copied a calculation to a global variable which doesn’t work in GLSL or more specificly GLSL ES since it worked fine on Windows.

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