func (m *Manager) LoadSprite(path string) (*Sprite, error) {
// We can't run this during an init() function because it will get queued to
// run before the opengl context is created, so we just check here and run
// it if we haven't run it before.
gen_tex_once.Do(func() {
render.Queue(func() {
gl.Enable(gl.TEXTURE_2D)
error_texture = gl.GenTexture()
error_texture.Bind(gl.TEXTURE_2D)
gl.TexEnvf(gl.TEXTURE_ENV, gl.TEXTURE_ENV_MODE, gl.MODULATE)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR_MIPMAP_LINEAR)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT)
pink := []byte{255, 0, 255, 255}
glu.Build2DMipmaps(gl.TEXTURE_2D, 4, 1, 1, gl.RGBA, pink)
})
})
path = filepath.Clean(path)
err := m.loadSharedSprite(path)
if err != nil {
return nil, err
}
var s Sprite
m.mutex.Lock()
s.shared = m.shared[path]
m.mutex.Unlock()
s.anim_node = s.shared.anim_start
s.state_node = s.shared.state_start
return &s, nil
}
// Creates a LosTexture with the specified size, which must be a power of two.
func MakeLosTexture() *LosTexture {
var lt LosTexture
lt.pix = make([]byte, LosTextureSizeSquared)
lt.p2d = make([][]byte, LosTextureSize)
lt.rec = make(chan gl.Texture, 1)
for i := 0; i < LosTextureSize; i++ {
lt.p2d[i] = lt.pix[i*LosTextureSize : (i+1)*LosTextureSize]
}
render.Queue(func() {
gl.Enable(gl.TEXTURE_2D)
tex := gl.GenTexture()
tex.Bind(gl.TEXTURE_2D)
gl.TexEnvf(gl.TEXTURE_ENV, gl.TEXTURE_ENV_MODE, gl.MODULATE)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT)
gl.TexImage2D(gl.TEXTURE_2D, 0, gl.ALPHA, len(lt.p2d), len(lt.p2d), 0, gl.ALPHA, gl.BYTE, lt.pix)
lt.rec <- tex
runtime.SetFinalizer(<, losTextureFinalize)
})
return <
}
func makeErrorTexture() {
gl.Enable(gl.TEXTURE_2D)
error_texture = gl.GenTexture()
error_texture.Bind(gl.TEXTURE_2D)
gl.TexEnvf(gl.TEXTURE_ENV, gl.TEXTURE_ENV_MODE, gl.MODULATE)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR_MIPMAP_LINEAR)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT)
transparent := []byte{0, 0, 0, 0}
glu.Build2DMipmaps(gl.TEXTURE_2D, 4, 1, 1, gl.RGBA, transparent)
}
func (s *sheet) makeTexture(pixer <-chan []byte) {
gl.Enable(gl.TEXTURE_2D)
s.texture = gl.GenTexture()
s.texture.Bind(gl.TEXTURE_2D)
gl.TexEnvf(gl.TEXTURE_ENV, gl.TEXTURE_ENV_MODE, gl.MODULATE)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR_MIPMAP_LINEAR)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT)
data := <-pixer
glu.Build2DMipmaps(gl.TEXTURE_2D, 4, s.dx, s.dy, gl.RGBA, data)
memory.FreeBlock(data)
}
func (w *ImageBox) SetImage(path string) {
w.UnsetImage()
data, err := os.Open(path)
if err != nil {
// TODO: Log error
return
}
var img image.Image
img, _, err = image.Decode(data)
if err != nil {
// TODO: Log error
return
}
w.Request_dims.Dx = img.Bounds().Dx()
w.Request_dims.Dy = img.Bounds().Dy()
canvas := image.NewRGBA(image.Rect(0, 0, img.Bounds().Dx(), img.Bounds().Dy()))
for y := 0; y < canvas.Bounds().Dy(); y++ {
for x := 0; x < canvas.Bounds().Dx(); x++ {
r, g, b, a := img.At(x, y).RGBA()
base := 4*x + canvas.Stride*y
canvas.Pix[base] = uint8(r)
canvas.Pix[base+1] = uint8(g)
canvas.Pix[base+2] = uint8(b)
canvas.Pix[base+3] = uint8(a)
}
}
w.texture = gl.GenTexture()
gl.Enable(gl.TEXTURE_2D)
w.texture.Bind(gl.TEXTURE_2D)
gl.TexEnvf(gl.TEXTURE_ENV, gl.TEXTURE_ENV_MODE, gl.MODULATE)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT)
glu.Build2DMipmaps(gl.TEXTURE_2D, 4, img.Bounds().Dx(), img.Bounds().Dy(), gl.RGBA, canvas.Pix)
w.active = true
}
func (w *TextLine) figureDims() {
// Always draw the text as white on a transparent background so that we can change
// the color easily through opengl
w.rdims.Dx, w.rdims.Dy = drawText(w.font, w.context, color.RGBA{255, 255, 255, 255}, image.NewRGBA(image.Rect(0, 0, 1, 1)), w.text)
texture_dims := Dims{
Dx: int(nextPowerOf2(uint32(w.rdims.Dx))),
Dy: int(nextPowerOf2(uint32(w.rdims.Dy))),
}
w.rgba = image.NewRGBA(image.Rect(0, 0, texture_dims.Dx, texture_dims.Dy))
drawText(w.font, w.context, color.RGBA{255, 255, 255, 255}, w.rgba, w.text)
gl.Enable(gl.TEXTURE_2D)
w.texture.Bind(gl.TEXTURE_2D)
gl.TexEnvf(gl.TEXTURE_ENV, gl.TEXTURE_ENV_MODE, gl.MODULATE)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT)
glu.Build2DMipmaps(gl.TEXTURE_2D, 4, w.rgba.Bounds().Dx(), w.rgba.Bounds().Dy(), gl.RGBA, w.rgba.Pix)
gl.Disable(gl.TEXTURE_2D)
}
func handleLoadRequest(req loadRequest) {
f, _ := os.Open(req.path)
im, _, err := image.Decode(f)
f.Close()
if err != nil {
return
}
gray := true
dx := im.Bounds().Dx()
dy := im.Bounds().Dy()
for i := 0; i < dx; i++ {
for j := 0; j < dy; j++ {
r, g, b, _ := im.At(i, j).RGBA()
if r != g || g != b {
gray = false
break
}
}
if !gray {
break
}
}
var canvas draw.Image
var pix []byte
if gray {
ga := NewGrayAlpha(im.Bounds())
pix = ga.Pix
canvas = ga
} else {
pix = memory.GetBlock(4 * req.data.dx * req.data.dy)
canvas = &image.RGBA{pix, 4 * req.data.dx, im.Bounds()}
}
draw.Draw(canvas, im.Bounds(), im, image.Point{}, draw.Src)
load_mutex.Lock()
load_count += len(pix)
manual_unlock := false
// This prevents us from trying to send too much to opengl in a single
// frame. If we go over the threshold then we hold the lock until we're
// done sending data to opengl, then other requests will be free to
// queue up and they will run on the next frame.
if load_count < load_threshold {
load_mutex.Unlock()
} else {
manual_unlock = true
}
render.Queue(func() {
{
gl.Enable(gl.TEXTURE_2D)
req.data.texture = gl.GenTexture()
req.data.texture.Bind(gl.TEXTURE_2D)
gl.TexEnvf(gl.TEXTURE_ENV, gl.TEXTURE_ENV_MODE, gl.MODULATE)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR_MIPMAP_LINEAR)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.REPEAT)
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.REPEAT)
}
if gray {
glu.Build2DMipmaps(gl.TEXTURE_2D, gl.LUMINANCE_ALPHA, req.data.dx, req.data.dy, gl.LUMINANCE_ALPHA, pix)
} else {
glu.Build2DMipmaps(gl.TEXTURE_2D, gl.RGBA, req.data.dx, req.data.dy, gl.RGBA, pix)
}
memory.FreeBlock(pix)
if manual_unlock {
load_count = 0
load_mutex.Unlock()
}
})
}