51 lines
1.3 KiB
C++
51 lines
1.3 KiB
C++
// 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
|
|
|