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// This file is part of libigl, a simple c++ geometry processing library.
//
// Copyright (C) 2013 Alec Jacobson <alecjacobson@gmail.com>
//
// This Source Code Form is subject to the terms of the Mozilla Public License
// v. 2.0. If a copy of the MPL was not distributed with this file, You can
// obtain one at http://mozilla.org/MPL/2.0/.
#include "destroy_shader_program.h"
#include "report_gl_error.h"
#include <cstdio>
IGL_INLINE bool igl::opengl::destroy_shader_program(const GLuint id)
{
// Don't try to destroy id == 0 (no shader program)
if(id == 0)
{
fprintf(stderr,"Error: destroy_shader_program() id = %d"
" but must should be positive\n",id);
return false;
}
// Get each attached shader one by one and detach and delete it
GLsizei count;
// shader id
GLuint s;
do
{
// Try to get at most *1* attached shader
glGetAttachedShaders(id,1,&count,&s);
GLenum err = igl::opengl::report_gl_error();
if (GL_NO_ERROR != err)
{
return false;
}
// Check that we actually got *1*
if(count == 1)
{
// Detach and delete this shader
glDetachShader(id,s);
glDeleteShader(s);
}
}while(count > 0);
// Now that all of the shaders are gone we can just delete the program
glDeleteProgram(id);
return true;
}
#ifdef IGL_STATIC_LIBRARY
// Explicit template instantiation
#endif
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