func CompileShader(s Shader) {
defer func() {
errstr := errDrain()
log.Printf("gl.CompileShader(%v) %v", s, errstr)
}()
C.glCompileShader(s.c())
}
func (shader Shader) Compile() {
C.glCompileShader(C.GLuint(shader))
status := C.GLint(0)
C.glGetShaderiv(C.GLuint(shader), C.GL_COMPILE_STATUS, &status)
if status != C.GL_TRUE {
loglen := C.GLint(0)
C.glGetShaderiv(C.GLuint(shader), C.GL_INFO_LOG_LENGTH, &loglen)
log := (*C.GLchar)(C.malloc(C.size_t(loglen)))
defer C.free(unsafe.Pointer(log))
C.glGetShaderInfoLog(C.GLuint(shader), C.GLsizei(loglen), nil, log)
panic(fmt.Errorf("Failed to compile %s: %s", shader.Type(), C.GoString((*C.char)(log))))
}
}
// NewShader creates a shader object of type typ, loads it with source code src and compiles it
func NewShader(typ int, src string) (Shader, error) {
var val C.GLint
shad := C.glCreateShader(C.GLenum(typ))
s := (*C.GLchar)(C.CString(src))
C.glShaderSource(shad, 1, &s, nil)
C.glCompileShader(shad)
C.glGetShaderiv(shad, COMPILE_STATUS, &val)
if val != TRUE {
C.glGetShaderiv(shad, INFO_LOG_LENGTH, &val)
buf := make([]C.GLchar, val+1)
C.glGetShaderInfoLog(shad, C.GLsizei(val), nil, &buf[0])
C.glDeleteShader(shad)
return Shader(0), errors.New(C.GoString((*C.char)(&buf[0])))
}
return Shader(shad), nil
}
func loadShader(shaderType C.GLenum, source string) C.GLuint {
handle := C.glCreateShader(shaderType)
if handle == 0 {
panic(fmt.Errorf("Failed to create shader of type %v", shaderType))
}
sourceC := C.CString(source)
defer C.free(unsafe.Pointer(sourceC))
C.glShaderSource(handle, 1, (**C.GLchar)(unsafe.Pointer(&sourceC)), (*C.GLint)(unsafe.Pointer(nil)))
C.glCompileShader(handle)
var compiled C.GLint
C.glGetShaderiv(handle, C.GL_COMPILE_STATUS, &compiled)
if compiled != C.GL_TRUE {
log := GetShaderInfoLog(handle)
panic(fmt.Errorf("Failed to compile shader: %v, shader: %v", log, source))
}
return handle
}
func CompileShader(s Shader) {
C.glCompileShader(s.c())
}
func CompileShader(
shader uint32) {
C.glCompileShader(
C.GLuint(shader))
}
func (shader Shader) Compile() { C.glCompileShader(C.GLuint(shader)) }