Example #1
0
func newProgram(vertexShaderSource, fragmentShaderSource string) (uint32, error) {
	vertexShader, err := compileShader(vertexShaderSource, gl.VERTEX_SHADER)
	if err != nil {
		return 0, err
	}

	fragmentShader, err := compileShader(fragmentShaderSource, gl.FRAGMENT_SHADER)
	if err != nil {
		return 0, err
	}

	program := gl.CreateProgram()

	gl.AttachShader(program, vertexShader)
	gl.AttachShader(program, fragmentShader)
	gl.LinkProgram(program)

	var status int32
	gl.GetProgramiv(program, gl.LINK_STATUS, &status)
	if status == gl.FALSE {
		var logLength int32
		gl.GetProgramiv(program, gl.INFO_LOG_LENGTH, &logLength)

		log := strings.Repeat("\x00", int(logLength+1))
		gl.GetProgramInfoLog(program, logLength, nil, gl.Str(log))

		return 0, fmt.Errorf("failed to link program: %v", log)
	}

	gl.DeleteShader(vertexShader)
	gl.DeleteShader(fragmentShader)

	return program, nil
}
Example #2
0
func LoadShaders(shaders []ShaderInfo) (uint32, error) {
	program := gl.CreateProgram()

	for _, shaderInfo := range shaders {
		shader, err := shaderInfo.CompileShader()
		if err != nil {
			return 0, err
		}
		gl.AttachShader(program, shader)
		gl.DeleteShader(shader)
	}

	gl.LinkProgram(program)

	var status int32
	gl.GetProgramiv(program, gl.LINK_STATUS, &status)
	if status == gl.FALSE {
		var logLength int32
		gl.GetProgramiv(program, gl.INFO_LOG_LENGTH, &logLength)

		log := strings.Repeat("\x00", int(logLength+1))
		gl.GetProgramInfoLog(program, logLength, nil, gl.Str(log))

		return 0, fmt.Errorf("Failed to link program: %v", log)
	}

	return program, nil
}
Example #3
0
func newProgram(shaders ...uint32) (uint32, error) {
	program := gl.CreateProgram()

	for _, shader := range shaders {
		gl.AttachShader(program, shader)
	}
	gl.LinkProgram(program)

	var status int32
	gl.GetProgramiv(program, gl.LINK_STATUS, &status)
	if status == gl.FALSE {
		var logLength int32
		gl.GetProgramiv(program, gl.INFO_LOG_LENGTH, &logLength)

		log := strings.Repeat("\x00", int(logLength+1))
		gl.GetProgramInfoLog(program, logLength, nil, gl.Str(log))

		return 0, errors.New(fmt.Sprintf("failed to link program: %v", log))
	}

	for _, shader := range shaders {
		gl.DeleteShader(shader)
	}

	return program, nil
}
Example #4
0
func NewProgram(shaderSource map[string]string) (*GLSLProgram, error) {
	var hasVertexShader bool
	var hasFragmentShader bool

	vertexShaderSource, ok := shaderSource["vertex"]
	var vertexShader uint32
	if ok {

		vertexShader, err := compileShader(vertexShaderSource, gl.VERTEX_SHADER)
		if err != nil {
			return nil, err
		}
		hasVertexShader = true
	}

	fragmentShaderSource, ok := shaderSource["fragment"]
	var fragmentShader uint32
	if ok {

		fragmentShader, err := compileShader(fragmentShaderSource, gl.FRAGMENT_SHADER)
		if err != nil {
			return nil, err
		}
		hasFragmentShader = true
	}

	program := gl.CreateProgram()

	if !(hasVertexShader && hasFragmentShader) {
		return nil, fmt.Errorf("Need vertex shader: %v, and fragment shader: %v", hasVertexShader, hasFragmentShader)
	}

	gl.AttachShader(program, vertexShader)
	gl.AttachShader(program, fragmentShader)
	gl.LinkProgram(program)

	var status int32
	gl.GetProgramiv(program, gl.LINK_STATUS, &status)
	if status == gl.FALSE {
		var logLength int32
		gl.GetProgramiv(program, gl.INFO_LOG_LENGTH, &logLength)

		log := strings.Repeat("\x00", int(logLength+1))
		gl.GetProgramInfoLog(program, logLength, nil, gl.Str(log))

		return nil, fmt.Errorf("Failed to link program(%v): %v", program, log)
	}

	gl.DeleteShader(vertexShader)
	gl.DeleteShader(fragmentShader)
	p := &GLSLProgram{program, vertexShaderSource, fragmentShaderSource, true}
	return p, nil
}
Example #5
0
func (p *Program) GetProgramInfoLog() string {
	var logSize int32 = 0
	gl.GetProgramiv(p.prog, gl.INFO_LOG_LENGTH, &logSize)
	var infoLog []uint8 = make([]uint8, logSize)
	gl.GetProgramInfoLog(p.prog, logSize, &logSize, &infoLog[0])
	return gl.GoStr(&infoLog[0])
}
Example #6
0
func newProgram(vertexShaderFilename, fragmentShaderFilename string) (uint32, error) {
	program := gl.CreateProgram()

	//vertexShaderSource, err := shaders.Asset(vertexShaderFilename)
	//if err != nil {
	//	return 0, err
	//}

	vertexShader, err := shaders.Compile(vertexShaderSource, gl.VERTEX_SHADER)
	if err != nil {
		return 0, err
	}

	//fragmentShaderSource, err := shaders.Asset(fragmentShaderFilename)
	//if err != nil {
	//	return 0, err
	//}
	fragmentShader, err := shaders.Compile(fragmentShaderSource, gl.FRAGMENT_SHADER)
	if err != nil {
		return 0, err
	}

	gl.AttachShader(program, vertexShader)
	gl.AttachShader(program, fragmentShader)
	gl.LinkProgram(program)

	var status int32
	gl.GetProgramiv(program, gl.LINK_STATUS, &status)
	if status == gl.FALSE {
		var logLength int32
		gl.GetProgramiv(program, gl.INFO_LOG_LENGTH, &logLength)

		log := strings.Repeat("\x00", int(logLength+1))
		gl.GetProgramInfoLog(program, logLength, nil, gl.Str(log))

		return 0, errors.New(fmt.Sprintf("failed to link program: %v", log))
	}

	gl.DeleteShader(vertexShader)
	gl.DeleteShader(fragmentShader)

	return program, nil
}
Example #7
0
func (p *Program) ValidateProgram() error {
	gl.ValidateProgram(p.prog)

	var success int32 = gl.FALSE
	gl.GetProgramiv(p.prog, gl.VALIDATE_STATUS, &success)

	if success == gl.FALSE {
		return fmt.Errorf("Failed to validate the program!\n%s", p.GetProgramInfoLog())
	}
	return nil
}
Example #8
0
// loads shader objects and then attaches them to a program
func LoadShaderProgram(vertShader string, fragShader string, attribs []string) (*Program, error) {
	// create the program
	var prog uint32 = gl.CreateProgram()
	var p *Program = &Program{prog, make(map[string]int32)}

	// create the vertex shader
	var vs uint32 = gl.CreateShader(gl.VERTEX_SHADER)
	ShaderSource(vs, vertShader)
	gl.CompileShader(vs)

	var success int32 = gl.FALSE
	gl.GetShaderiv(vs, gl.COMPILE_STATUS, &success)

	if success == gl.FALSE {
		return nil, fmt.Errorf("Failed to compile the vertex shader!\n%s", GetShaderInfoLog(vs))
	}

	// create the fragment shader
	var fs uint32 = gl.CreateShader(gl.FRAGMENT_SHADER)
	ShaderSource(fs, fragShader)
	gl.CompileShader(fs)

	success = gl.FALSE
	gl.GetShaderiv(fs, gl.COMPILE_STATUS, &success)

	if success == gl.FALSE {
		return nil, fmt.Errorf("Failed to compile the fragment shader!\n%s", GetShaderInfoLog(fs))
	}

	// attach the shaders to the program and link
	gl.AttachShader(prog, vs)
	gl.AttachShader(prog, fs)

	for i := 1; i <= len(attribs); i++ {
		var attr_array []uint8 = StringToArray(attribs[i-1])
		gl.BindAttribLocation(prog, uint32(i), &attr_array[0])
	}

	gl.LinkProgram(prog)

	success = gl.FALSE
	gl.GetProgramiv(prog, gl.LINK_STATUS, &success)

	if success == gl.FALSE {
		return nil, fmt.Errorf("Failed to link the program!\n%s", p.GetProgramInfoLog())
	}

	// at this point the shaders can be deleted
	gl.DeleteShader(vs)
	gl.DeleteShader(fs)

	return p, nil
}