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