func (self *ShaderInfo) CompileShader() (uint32, error) {
content, err := ioutil.ReadFile(self.Path)
if err != nil {
return 0, err
}
contentString := bytes.NewBuffer(content).String()
glContentString := gl.Str(contentString + "\x00")
shader := gl.CreateShader(self.ShaderType)
gl.ShaderSource(shader, 1, &glContentString, nil)
gl.CompileShader(shader)
var status int32
gl.GetShaderiv(shader, gl.COMPILE_STATUS, &status)
if status == gl.FALSE {
var logLength int32
gl.GetShaderiv(shader, gl.INFO_LOG_LENGTH, &logLength)
log := strings.Repeat("\x00", int(logLength+1))
gl.GetShaderInfoLog(shader, logLength, nil, gl.Str(log))
return 0, fmt.Errorf("failed to compile %v: %v", contentString, log)
}
return shader, nil
}
func ShaderSource(shader uint32, src string) {
//var srcArray []uint8 = StringToArray(src)
//var ptr *uint8 = &srcArray[0]
src += "\x00"
csources, free := gl.Strs(src)
gl.ShaderSource(shader, 1, csources, nil)
free()
}
func compileShader(shaderCode string, shaderType uint32) uint32 {
shader := gl.CreateShader(shaderType)
shaderChars := gl.Str(shaderCode + "\x00")
gl.ShaderSource(shader, 1, &shaderChars, nil)
gl.CompileShader(shader)
checkShaderCompileErrors(shader)
return shader
}
func compileShaders() []uint32 {
// create the vertex shader
vertexShader := gl.CreateShader(gl.VERTEX_SHADER)
shaderSourceChars := gl.Str(vertexShaderSource + "\x00")
gl.ShaderSource(vertexShader, 1, &shaderSourceChars, nil)
gl.CompileShader(vertexShader)
checkShaderCompileErrors(vertexShader)
// create the fragment shader
fragmentShader := gl.CreateShader(gl.FRAGMENT_SHADER)
shaderSourceChars = gl.Str(fragmentShaderSource + "\x00")
gl.ShaderSource(fragmentShader, 1, &shaderSourceChars, nil)
gl.CompileShader(fragmentShader)
checkShaderCompileErrors(fragmentShader)
return []uint32{vertexShader, fragmentShader}
}
func createProgram() uint32 {
vs := gl.CreateShader(gl.VERTEX_SHADER)
cvertexShader := gl.Str(vertexShader)
gl.ShaderSource(vs, 1, &cvertexShader, nil)
gl.CompileShader(vs)
fs := gl.CreateShader(gl.FRAGMENT_SHADER)
cfragmentShader := gl.Str(fragmentShader)
gl.ShaderSource(fs, 1, &cfragmentShader, nil)
gl.CompileShader(fs)
shaderProgram := gl.CreateProgram()
gl.AttachShader(shaderProgram, fs)
gl.AttachShader(shaderProgram, vs)
gl.LinkProgram(shaderProgram)
return shaderProgram
}
func (me *Core) AddProgram(vertFile, fragFile string) int {
vertexShader := gl.Str(readWholeFile(vertFile) + "\x00")
fragmentShader := gl.Str(readWholeFile(fragFile) + "\x00")
n := me.nbProg
vs := gl.CreateShader(gl.VERTEX_SHADER)
gl.ShaderSource(vs, 1, &vertexShader, nil)
gl.CompileShader(vs)
fs := gl.CreateShader(gl.FRAGMENT_SHADER)
gl.ShaderSource(fs, 1, &fragmentShader, nil)
gl.CompileShader(fs)
me.Progs[n] = gl.CreateProgram()
gl.AttachShader(me.Progs[n], fs)
gl.AttachShader(me.Progs[n], vs)
gl.LinkProgram(me.Progs[n])
me.nbProg++
return n
}
func NewShader(src string, sType uint32) (*Shader, error) {
handle := gl.CreateShader(sType)
glSrc := gl.Str(src + "\x00")
gl.ShaderSource(handle, 1, &glSrc, nil)
gl.CompileShader(handle)
err := getGlError(handle, gl.COMPILE_STATUS, gl.GetShaderiv, gl.GetShaderInfoLog,
"SHADER::COMPILE_FAILURE::")
if err != nil {
return nil, err
}
return &Shader{handle: handle}, nil
}
func compileShader(source string, shaderType uint32) (uint32, error) {
shader := gl.CreateShader(shaderType)
csource := gl.Str(source)
gl.ShaderSource(shader, 1, &csource, nil)
gl.CompileShader(shader)
var status int32
gl.GetShaderiv(shader, gl.COMPILE_STATUS, &status)
if status == gl.FALSE {
var logLength int32
gl.GetShaderiv(shader, gl.INFO_LOG_LENGTH, &logLength)
log := strings.Repeat("\x00", int(logLength+1))
gl.GetShaderInfoLog(shader, logLength, nil, gl.Str(log))
return 0, fmt.Errorf("failed to compile %v: %v", source, log)
}
return shader, nil
}