Exemple #1
0
func reinitScreen(width, height int) {
	winWidth, winHeight = gl.Sizei(width), gl.Sizei(height)
	if sdlScreen != nil {
		sdlScreen.Free()
	}
	sdlScreen = sdl.SetVideoMode(width, height, 24, sdl.OPENGL|sdl.RESIZABLE)
	if sdlScreen == nil {
		panic("SDL video init error")
	}
}
Exemple #2
0
func glFillTextureFromImageFile(filePath string) {
	var file, err = os.Open(filePath)
	var img image.Image
	if err != nil {
		panic(err)
	}
	defer file.Close()
	if img, _, err = image.Decode(file); err != nil {
		panic(err)
	}
	w, h := img.Bounds().Dx(), img.Bounds().Dy()
	rgba := image.NewRGBA(image.Rect(0, 0, w, h))
	for x := 0; x < w; x++ {
		for y := 0; y < h; y++ {
			rgba.Set(x, y, img.At(x, y))
		}
	}
	gl.TexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.Sizei(w), gl.Sizei(h), 0, gl.RGBA, gl.UNSIGNED_BYTE, gl.Pointer(&rgba.Pix[0]))
}
Exemple #3
0
func glGetInfoLog(shaderOrProgram gl.Uint, isShader bool) string {
	var l = gl.Sizei(256)
	var s = gl.GLStringAlloc(l)
	defer gl.GLStringFree(s)
	if isShader {
		gl.GetShaderInfoLog(shaderOrProgram, l, nil, s)
	} else {
		gl.GetProgramInfoLog(shaderOrProgram, l, nil, s)
	}
	return gl.GoString(s)
}
Exemple #4
0
func glSetShaderSource(shader gl.Uint, source string) {
	var src = gl.GLStringArray(source)
	defer gl.GLStringArrayFree(src)
	gl.ShaderSource(shader, gl.Sizei(len(src)), &src[0], nil)
}