public void link() {
for (Shader s : shaders) {
if (null != s && s.shader == -1) {
s.compile();
}
}
int newProgram = linkProgram(shaders);
if (program != -1) {
glDeleteProgram(program);
program = -1;
}
this.uniforms.clear();
this.attributes.clear();
program = newProgram;
if (program == -1) {
throw new IllegalStateException("Link failure");
}
int count = glGetProgrami(program, GL_ACTIVE_UNIFORMS);
for (int i = 0; i < count; ++i) {
String name = glGetActiveUniform(program, i, 256);
int location = glGetUniformLocation(program, name);
this.uniforms.put(name, location);
}
count = glGetProgrami(program, GL_ACTIVE_ATTRIBUTES);
for (int i = 0; i < count; ++i) {
String name = glGetActiveAttrib(program, i, 256);
int location = glGetAttribLocation(program, name);
this.attributes.put(name, location);
}
}
public static int linkProgram(Shader... shaders) {
int newProgram = glCreateProgram();
for (Shader s : shaders) {
if (null != s) {
s.attach(newProgram);
}
}
glLinkProgram(newProgram);
int linkResult = glGetProgrami(newProgram, GL_LINK_STATUS);
if (GL_TRUE != linkResult) {
String log = getLog(newProgram);
LOG.warn("Link failed: " + log);
glDeleteProgram(newProgram);
throw new RuntimeException(log);
}
return newProgram;
}