func NewGLRenderer(view *View, title string) *GLRenderer {
r := new(GLRenderer)
r.View = view
GL <- func() {
if sdl.Init(sdl.INIT_VIDEO) < 0 {
panic(sdl.GetError())
}
sdl.GL_SetAttribute(sdl.GL_DOUBLEBUFFER, 1)
sdl.GL_SetAttribute(sdl.GL_SWAP_CONTROL, 1)
r.Screen = sdl.SetVideoMode(view.Width, view.Height, 32, sdl.OPENGL)
if r.Screen == nil {
panic(sdl.GetError())
}
sdl.WM_SetCaption(title, title)
err := gl33.Init()
if err != nil {
panic(err)
}
gl33.Enable(gl33.BLEND)
gl33.Enable(gl33.CULL_FACE)
gl33.Enable(gl33.DEPTH_TEST)
gl33.ClearColor(1.0, 1.0, 1.0, 1.0)
gl33.BlendFunc(gl33.SRC_ALPHA, gl33.ONE_MINUS_SRC_ALPHA)
gl33.DepthFunc(gl33.LEQUAL)
gl33.Viewport(0, 0, gl33.Sizei(view.Width), gl33.Sizei(view.Height))
}
r.PerspectiveMatrix = s3dm.PerspectiveMatrix(view.Fovy, view.Aspect, view.Near, view.Far)
r.OrthographicMatrix = s3dm.OrthographicMatrix(float64(view.Width), float64(view.Height), 0, 1)
return r
}
func LoadTextureCubeMap(filenames *[6]string, minFilter int, magFilter int) *Texture {
ch := make(chan *Texture)
GL <- func() {
tex := NewTextureCubeMap()
tex.SetFilters(minFilter, magFilter)
tex.Bind(0)
var surfaces [6]*sdl.Surface
for i, filename := range filenames {
surfaces[i] = sdl.Load(filename)
if surfaces[i] == nil {
panic(sdl.GetError())
}
defer surfaces[i].Free()
}
tex.Width = int(surfaces[0].W)
tex.Height = int(surfaces[0].H)
uploadSurface(gl33.TEXTURE_CUBE_MAP_POSITIVE_X, surfaces[0])
uploadSurface(gl33.TEXTURE_CUBE_MAP_NEGATIVE_X, surfaces[1])
uploadSurface(gl33.TEXTURE_CUBE_MAP_POSITIVE_Y, surfaces[2])
uploadSurface(gl33.TEXTURE_CUBE_MAP_NEGATIVE_Y, surfaces[3])
uploadSurface(gl33.TEXTURE_CUBE_MAP_POSITIVE_Z, surfaces[4])
uploadSurface(gl33.TEXTURE_CUBE_MAP_NEGATIVE_Z, surfaces[5])
gl33.GenerateMipmap(gl33.TEXTURE_CUBE_MAP)
ch <- tex
}
return <-ch
}
func LoadTexture2D(filename string, minFilter int, magFilter int) *Texture {
ch := make(chan *Texture)
GL <- func() {
tex := NewTexture2D()
tex.SetFilters(minFilter, magFilter)
tex.Bind(0)
surface := sdl.Load(filename)
if surface == nil {
panic(sdl.GetError())
}
defer surface.Free()
tex.Width = int(surface.W)
tex.Height = int(surface.H)
uploadSurface(gl33.TEXTURE_2D, surface)
gl33.GenerateMipmap(gl33.TEXTURE_2D)
ch <- tex
}
return <-ch
}
func LoadTextureArray(filenames []string, minFilter int, magFilter int) *Texture {
ch := make(chan *Texture)
GL <- func() {
tex := NewTextureArray()
tex.SetFilters(minFilter, magFilter)
tex.Bind(0)
surfaces := make([]*sdl.Surface, len(filenames))
for i, filename := range filenames {
surfaces[i] = sdl.Load(filename)
if surfaces[i] == nil {
panic(sdl.GetError())
}
defer surfaces[i].Free()
}
tex.Width = int(surfaces[0].W)
tex.Height = int(surfaces[0].H)
var internalFormat gl33.Int
var format gl33.Enum
var size int
if surfaces[0].Format.BitsPerPixel == 32 {
internalFormat = gl33.RGBA8
format = gl33.RGBA
size = 4
} else {
internalFormat = gl33.RGB8
format = gl33.RGB
size = 3
}
pixels := make([]byte, tex.Width*tex.Height*len(surfaces)*size)
for i, surface := range surfaces {
p := uintptr(surface.Pixels)
for j := 0; j < tex.Width*tex.Height*size; j++ {
pixels[i*tex.Width*tex.Height*size+j] = *(*byte)(unsafe.Pointer(p + uintptr(j)))
}
}
gl33.TexImage3D(gl33.TEXTURE_2D_ARRAY, 0, internalFormat, gl33.Sizei(tex.Width), gl33.Sizei(tex.Height), gl33.Sizei(len(surfaces)), 0, format, gl33.UNSIGNED_BYTE, gl33.Pointer(&pixels[0]))
gl33.GenerateMipmap(gl33.TEXTURE_2D_ARRAY)
ch <- tex
}
return <-ch
}