public void Dispose()
{
if (mProgram != 0)
{
Gles.glDeleteProgram(mProgram);
mProgram = 0;
}
if (mVertexPositionBuffer != 0)
{
Gles.glDeleteBuffers(1, ref mVertexPositionBuffer);
mVertexPositionBuffer = 0;
}
if (mVertexColorBuffer != 0)
{
Gles.glDeleteBuffers(1, ref mVertexColorBuffer);
mVertexColorBuffer = 0;
}
if (mIndexBuffer != 0)
{
Gles.glDeleteBuffers(1, ref mIndexBuffer);
mIndexBuffer = 0;
}
}
private static GLuint CompileProgram(string vsSource, string fsSource)
{
GLuint program = Gles.glCreateProgram();
if (program == 0)
{
throw new Exception("Program creation failed");
}
GLuint vs = CompileShader(Gles.GL_VERTEX_SHADER, vsSource);
GLuint fs = CompileShader(Gles.GL_FRAGMENT_SHADER, fsSource);
if (vs == 0 || fs == 0)
{
Gles.glDeleteShader(fs);
Gles.glDeleteShader(vs);
Gles.glDeleteProgram(program);
return(0);
}
Gles.glAttachShader(program, vs);
Gles.glDeleteShader(vs);
Gles.glAttachShader(program, fs);
Gles.glDeleteShader(fs);
Gles.glLinkProgram(program);
Gles.glGetProgramiv(program, Gles.GL_LINK_STATUS, out GLint linkStatus);
if (linkStatus == 0)
{
Gles.glGetProgramiv(program, Gles.GL_INFO_LOG_LENGTH, out GLint infoLogLength);
StringBuilder infoLog = new StringBuilder(infoLogLength);
Gles.glGetProgramInfoLog(program, (GLsizei)infoLog.Capacity, out GLsizei length, infoLog);
string errorMessage = "Program link failed: " + infoLog;
throw new Exception(errorMessage);
}
return(program);
}
