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Issue with array of uniforms in Shader Code

SUNIL

I am working on GLES program using ARM GLES3.0 Emulator ver 1.4.

I want to print all active uniform detail.


I ahve 25 active Uniform in my shader code, out of these 25 uniforms, second uniform is array of uniform 'uniformArray[100]'.


But when I iterate through active uniforms to see detail of each uniform, itstarts giving garbage values after first 25 uniforms( i.e after activeUniform1, uniformArray[0], uniformArray[1], uniformArray[2],... uniformArray[23] )


Please confirm if it was an issue with EGL 1.4


Parents
  • 0 in reply to Adam Charytoniuk

    pseudo code -

    GLint numUniforms = 0;
GL_CHECK(glGetProgramiv(uiProgram, GL_ACTIVE_UNIFORMS, &numUniforms));


printf("--------------------\nList of active uniforms:\n"); // numUniforms is 25 for my problem
for (int i = 0; i < numUniforms; i++) {
    // now -iteratuing through uniforms
    GLchar name[256] = { 0 };
    GLsizei len = 0;
    GLint size = 0;
    GLenum type = 0;
    GL_CHECK(glGetActiveUniform(uiProgram, i, 256, &len, &size, &type, name));
    printf("Uniform: %s, size: %d\n", name, size);
    std::string modifiedName = getUniformName(name, size); // replaces uniformArray[0] by uniformArray


    for (i = 0; i < size; ++i) {
        std::stringstream ss;
        ss << modifiedName;
        if (size > 1) {
           ss << '[' << i << ']';
        }


    std::string elemName = ss.str();
    float uniformValue = 0.0f;
    GLint location = glGetUniformLocation(program, elemName.c_str());
    assert(location != -1);
    if (location == -1) {
        continue;
    }
    
    switch (elemType) {
        case GL_FLOAT:
        glGetUniformfv(uiProgram, location, uniformValue);
        std::cout << elemName << ":"  << uniformValue << std::endl;
.....
....

    }




}
}




Output:
fltUniform1:1.7
uniformArray[0]:1.5
uniformArray[1]:1.6
uniformArray[2]:1.3
uniformArray[3]:1.8
..
..
uniformArray[22]:4.8
uniformArray[23]:4.3
uniformArray[24]:4.3
uniformArray[25]:4.3
uniformArray[26]:4.3
uniformArray[27]:4.3
...
//repeats total printed uniforms become 25
...
uniformArray[98]:4.3
uniformArray[99]:4.3
fltUniform2:-1.073742e+008
intUniform3:-858993460
intUniform4:-858993460
...
Reply
  • 0 in reply to Adam Charytoniuk

    pseudo code -

    GLint numUniforms = 0;
GL_CHECK(glGetProgramiv(uiProgram, GL_ACTIVE_UNIFORMS, &numUniforms));


printf("--------------------\nList of active uniforms:\n"); // numUniforms is 25 for my problem
for (int i = 0; i < numUniforms; i++) {
    // now -iteratuing through uniforms
    GLchar name[256] = { 0 };
    GLsizei len = 0;
    GLint size = 0;
    GLenum type = 0;
    GL_CHECK(glGetActiveUniform(uiProgram, i, 256, &len, &size, &type, name));
    printf("Uniform: %s, size: %d\n", name, size);
    std::string modifiedName = getUniformName(name, size); // replaces uniformArray[0] by uniformArray


    for (i = 0; i < size; ++i) {
        std::stringstream ss;
        ss << modifiedName;
        if (size > 1) {
           ss << '[' << i << ']';
        }


    std::string elemName = ss.str();
    float uniformValue = 0.0f;
    GLint location = glGetUniformLocation(program, elemName.c_str());
    assert(location != -1);
    if (location == -1) {
        continue;
    }
    
    switch (elemType) {
        case GL_FLOAT:
        glGetUniformfv(uiProgram, location, uniformValue);
        std::cout << elemName << ":"  << uniformValue << std::endl;
.....
....

    }




}
}




Output:
fltUniform1:1.7
uniformArray[0]:1.5
uniformArray[1]:1.6
uniformArray[2]:1.3
uniformArray[3]:1.8
..
..
uniformArray[22]:4.8
uniformArray[23]:4.3
uniformArray[24]:4.3
uniformArray[25]:4.3
uniformArray[26]:4.3
uniformArray[27]:4.3
...
//repeats total printed uniforms become 25
...
uniformArray[98]:4.3
uniformArray[99]:4.3
fltUniform2:-1.073742e+008
intUniform3:-858993460
intUniform4:-858993460
...
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