func GetProgramInfoLog(p Program) string {
infoLen := GetProgrami(p, INFO_LOG_LENGTH)
buf := C.malloc(C.size_t(infoLen))
C.free(buf)
C.glGetProgramInfoLog(p.c(), C.GLsizei(infoLen), nil, (*C.GLchar)(buf))
return C.GoString((*C.char)(buf))
}
// Link links the attached shader objects
func (p *Program) Link() error {
var val, val2 C.GLint
C.glLinkProgram(p.i)
C.glGetProgramiv(p.i, LINK_STATUS, &val)
if val != TRUE {
C.glGetProgramiv(p.i, INFO_LOG_LENGTH, &val)
buf := make([]C.GLchar, val+1)
C.glGetProgramInfoLog(p.i, C.GLsizei(val), nil, &buf[0])
return errors.New(C.GoString((*C.char)(&buf[0])))
}
p.attr = make(map[string]C.GLuint)
C.glGetProgramiv(p.i, ACTIVE_ATTRIBUTES, &val)
C.glGetProgramiv(p.i, ACTIVE_ATTRIBUTE_MAX_LENGTH, &val2)
buf := make([]C.char, val2)
for i := C.GLuint(0); i < C.GLuint(val); i++ {
C.glGetActiveAttrib(p.i, i, C.GLsizei(val2), nil, nil, nil, (*C.GLchar)(&buf[0]))
p.attr[C.GoString(&buf[0])] = C.GLuint(C.glGetAttribLocation(p.i, (*C.GLchar)(&buf[0])))
}
p.uni = make(map[string]C.GLint)
C.glGetProgramiv(p.i, ACTIVE_UNIFORMS, &val)
C.glGetProgramiv(p.i, ACTIVE_UNIFORM_MAX_LENGTH, &val2)
buf = make([]C.char, val2)
for i := C.GLuint(0); i < C.GLuint(val); i++ {
C.glGetActiveUniform(p.i, i, C.GLsizei(val2), nil, nil, nil, (*C.GLchar)(&buf[0]))
p.uni[C.GoString(&buf[0])] = C.glGetUniformLocation(p.i, (*C.GLchar)(&buf[0]))
}
return nil
}
// GetInfoLog returns the information log for a program object.
// This method makes two OpenGL calls: one to get the info log size, and one to get the info log.
func (p Program) GetInfoLog() string {
sz := p.Get(ProgramInfoLogLength)
cstr := (*C.char)(C.malloc(C.size_t(sz + 1)))
defer C.free(unsafe.Pointer(cstr))
C.glGetProgramInfoLog(C.GLuint(p), C.GLsizei(sz), nil, (*C.GLchar)(cstr))
return C.GoString(cstr)
}
func GetProgramInfoLog(program uint, bufsize int) string {
cs := CString("")
//defer C.free(unsafe.Pointer(cs))
C.glGetProgramInfoLog(C.GLuint(program), C.GLsizei(bufsize), nil, cs)
return GoString(cs)
}
func GetProgramInfoLog(
program uint32, bufsize Sizei,
length *Sizei, infolog *string) {
s := glString(*infolog)
C.glGetProgramInfoLog(
C.GLuint(program),
C.GLsizei(bufsize),
(*C.GLsizei)(length),
s)
infolog = goString(s)
}
func GetProgramInfoLog(p Program) (r0 string) {
defer func() {
errstr := errDrain()
log.Printf("gl.GetProgramInfoLog(%v) %v%v", p, r0, errstr)
}()
infoLen := GetProgrami(p, INFO_LOG_LENGTH)
buf := C.malloc(C.size_t(infoLen))
C.free(buf)
C.glGetProgramInfoLog(p.c(), C.GLsizei(infoLen), nil, (*C.GLchar)(buf))
return C.GoString((*C.char)(buf))
}
func GetProgramInfoLog(program C.GLuint) string {
var logLen C.GLint
C.glGetProgramiv(program, C.GL_INFO_LOG_LENGTH, &logLen)
var c C.GLchar
logLenBytes := int(logLen) * int(unsafe.Sizeof(c))
log := C.malloc(C.size_t(logLenBytes))
if log == nil {
panic("Failed to allocate shader log buffer")
}
defer C.free(log)
C.glGetProgramInfoLog(C.GLuint(program), C.GLsizei(logLen), (*C.GLsizei)(unsafe.Pointer(nil)), (*C.GLchar)(log))
return string(C.GoBytes(log, C.int(logLenBytes)))
}
func (program Program) GetInfoLog() string {
var length C.GLint
C.glGetProgramiv(C.GLuint(program), C.GLenum(INFO_LOG_LENGTH), &length)
// length is buffer size including null character
if length > 1 {
log := C.malloc(C.size_t(length))
defer C.free(log)
C.glGetProgramInfoLog(C.GLuint(program), C.GLsizei(length), nil, (*C.GLchar)(log))
return C.GoString((*C.char)(log))
}
return ""
}
func (program *Program) Link() {
C.glLinkProgram(program.id)
status := C.GLint(0)
C.glGetProgramiv(program.id, C.GL_LINK_STATUS, &status)
if status != C.GL_TRUE {
loglen := C.GLint(0)
C.glGetProgramiv(program.id, C.GL_INFO_LOG_LENGTH, &loglen)
log := (*C.GLchar)(C.malloc(C.size_t(loglen)))
defer C.free(unsafe.Pointer(log))
C.glGetProgramInfoLog(program.id, C.GLsizei(loglen), nil, log)
panic(fmt.Errorf("Failed to link shader: %s", C.GoString((*C.char)(log))))
}
}
func GetProgramInfoLog(
program uint32, bufsize Sizei,
length *Sizei) string {
buffer := (*C.GLchar)(C.malloc(C.size_t(bufsize)))
defer C.free(unsafe.Pointer(buffer))
C.glGetProgramInfoLog(
C.GLuint(program),
C.GLsizei(bufsize),
(*C.GLsizei)(length),
buffer)
return *goString(buffer)
}
