// Input shouldn't have newlines
func (o *OpenGlStream) PrintLine(s string) {
if o.BorderColor != nil {
gl.PushAttrib(gl.CURRENT_BIT)
expandedLineLength := caret.ExpandedLength(s, o.advance)
backgroundColor := nearlyWhiteColor
if o.BackgroundColor != nil {
backgroundColor = *o.BackgroundColor
}
DrawInnerRoundedBox(o.pos, mgl64.Vec2{fontWidth * float64(expandedLineLength), fontHeight}, *o.BorderColor, backgroundColor)
gl.PopAttrib()
}
segments := strings.Split(s, "\t")
for index, segment := range segments {
o.PrintSegment(segment)
o.advanceBy(uint32(len(segment)))
if index+1 < len(segments) {
tabSpaces := 4 - (o.advance % 4)
o.PrintSegment(strings.Repeat(" ", int(tabSpaces))) // Tab.
if o.ShowInvisibles {
gl.PushAttrib(gl.CURRENT_BIT)
DrawBorderlessBox(o.pos.Add(mgl64.Vec2{1, fontHeight/2 - 1}), mgl64.Vec2{fontWidth*float64(tabSpaces) - 2, 2}, selectedTextDarkColor)
gl.PopAttrib()
}
o.advanceBy(tabSpaces)
}
}
}
// Shouldn't have tabs nor newlines
func (o *OpenGlStream) PrintSegment(s string) {
if s == "" {
return
}
if o.BackgroundColor != nil && o.BorderColor == nil {
gl.PushAttrib(gl.CURRENT_BIT)
gl.Color3dv((*float64)(&o.BackgroundColor[0]))
gl.PushMatrix()
gl.Translated(float64(o.pos[0]), float64(o.pos[1]), 0)
for range s {
gl.CallList(oFontBackground)
}
gl.PopMatrix()
gl.PopAttrib()
}
gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_LOD_BIAS, float32(lodBias*0.01))
gl.Enable(gl.BLEND)
defer gl.Disable(gl.BLEND)
gl.Enable(gl.TEXTURE_2D)
defer gl.Disable(gl.TEXTURE_2D)
gl.PushMatrix()
gl.Translated(float64(o.pos[0]), float64(o.pos[1]), 0)
gl.ListBase(oFontBase + uint32(o.FontOptions)*96)
gl.CallLists(int32(len(s)), gl.UNSIGNED_BYTE, gl.Ptr(&[]byte(s)[0]))
gl.PopMatrix()
//CheckGLError()
}
// Printf draws the given string at the specified coordinates.
// It expects the string to be a single line. Line breaks are not
// handled as line breaks and are rendered as glyphs.
//
// In order to render multi-line text, it is up to the caller to split
// the text up into individual lines of adequate length and then call
// this method for each line seperately.
func (f *Font) Printf(x, y float32, fs string, argv ...interface{}) error {
indices := []rune(fmt.Sprintf(fs, argv...))
if len(indices) == 0 {
return nil
}
// Runes form display list indices.
// For this purpose, they need to be offset by -FontConfig.Low
low := f.config.Low
for i := range indices {
indices[i] -= low
}
var vp [4]int32
gl.GetIntegerv(gl.VIEWPORT, &vp[0])
gl.PushAttrib(gl.TRANSFORM_BIT)
gl.MatrixMode(gl.PROJECTION)
gl.PushMatrix()
gl.LoadIdentity()
gl.Ortho(float64(vp[0]), float64(vp[2]), float64(vp[1]), float64(vp[3]), 0, 1)
gl.PopAttrib()
gl.PushAttrib(gl.LIST_BIT | gl.CURRENT_BIT | gl.ENABLE_BIT | gl.TRANSFORM_BIT)
{
gl.MatrixMode(gl.MODELVIEW)
gl.Disable(gl.LIGHTING)
gl.Disable(gl.DEPTH_TEST)
gl.Enable(gl.BLEND)
gl.Enable(gl.TEXTURE_2D)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
gl.TexEnvf(gl.TEXTURE_ENV, gl.TEXTURE_ENV_MODE, gl.MODULATE)
gl.BindTexture(gl.TEXTURE_2D, f.texture)
gl.ListBase(f.listbase)
var mv [16]float32
gl.GetFloatv(gl.MODELVIEW_MATRIX, &mv[0])
gl.PushMatrix()
{
gl.LoadIdentity()
mgw := float32(f.maxGlyphWidth)
mgh := float32(f.maxGlyphHeight)
switch f.config.Dir {
case LeftToRight, TopToBottom:
gl.Translatef(x, float32(vp[3])-y-mgh, 0)
case RightToLeft:
gl.Translatef(x-mgw, float32(vp[3])-y-mgh, 0)
}
gl.MultMatrixf(&mv[0])
gl.CallLists(int32(len(indices)), gl.UNSIGNED_INT, unsafe.Pointer(&indices[0]))
}
gl.PopMatrix()
gl.BindTexture(gl.TEXTURE_2D, 0)
}
gl.PopAttrib()
gl.PushAttrib(gl.TRANSFORM_BIT)
gl.MatrixMode(gl.PROJECTION)
gl.PopMatrix()
gl.PopAttrib()
return checkGLError()
}
