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util: check for frag/vertShader=0 before attaching

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This commit is contained in:
Brian Paul 2008-12-17 13:58:05 -07:00
parent 26b5e92c30
commit 7d41f10605
1 changed files with 7 additions and 2 deletions
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9
progs/util/shaderutil.c
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@ -6,6 +6,7 @@
*/
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <GL/glut.h>
@ -106,8 +107,12 @@ LinkShaders(GLuint vertShader, GLuint fragShader)
{
GLuint program = glCreateProgram_func();
glAttachShader_func(program, fragShader);
glAttachShader_func(program, vertShader);
assert(vertShader || fragShader);
if (fragShader)
glAttachShader_func(program, fragShader);
if (vertShader)
glAttachShader_func(program, vertShader);
glLinkProgram_func(program);
/* check link */