Exemplo n.º 1
0
// Sets up anything that wouldn't have been loaded from disk, including
// all opengl data, and sets up finalizers for that data.
func (d *Dictionary) setupGlStuff() {
	d.dlists = make(map[string]uint32)
	d.strs = make(map[string]strBuffer)
	d.pars = make(map[string]strBuffer)
	// TODO: This finalizer is untested
	runtime.SetFinalizer(d, func(d *Dictionary) {
		render.Queue(func() {
			for _, v := range d.dlists {
				gl.DeleteLists(gl.Uint(v), 1)
			}
		})
	})

	render.Queue(func() {
		gl.Enable(gl.TEXTURE_2D)
		gl.GenTextures(1, (*gl.Uint)(&d.texture))
		gl.BindTexture(gl.TEXTURE_2D, gl.Uint(d.texture))
		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)
		glu.Build2DMipmaps(gl.TEXTURE_2D, 4, d.data.Dx, d.data.Dy, gl.RGBA, d.data.Pix)
		gl.Disable(gl.TEXTURE_2D)
	})
}
Exemplo n.º 2
0
func (d *Dictionary) RenderString(s string, x, y, z, height float64, just Justification) {
	if len(s) == 0 {
		return
	}
	strbuf, ok := d.strs[s]
	if !ok {
		defer d.RenderString(s, x, y, z, height, just)
	}
	size := unsafe.Sizeof(dictVert{})
	scale := height / float64(d.data.Maxy-d.data.Miny)
	width := float32(d.figureWidth(s) * scale)
	x_pos := float32(x)
	switch just {
	case Center:
		x_pos -= width / 2
	case Right:
		x_pos -= width
	}
	if ok {
		gl.PushMatrix()
		defer gl.PopMatrix()
		gl.Translated(gl.Double(x_pos), gl.Double(y), gl.Double(z))
		gl.Scaled(gl.Double(scale), gl.Double(scale), 1)

		gl.PushAttrib(gl.COLOR_BUFFER_BIT)
		defer gl.PopAttrib()
		gl.Enable(gl.BLEND)
		gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)

		gl.Enable(gl.TEXTURE_2D)
		gl.BindTexture(gl.TEXTURE_2D, gl.Uint(d.texture))

		gl.BindBuffer(gl.ARRAY_BUFFER, gl.Uint(strbuf.vbuffer))

		gl.EnableClientState(gl.VERTEX_ARRAY)
		gl.VertexPointer(2, gl.FLOAT, gl.Sizei(size), nil)

		gl.EnableClientState(gl.TEXTURE_COORD_ARRAY)
		gl.TexCoordPointer(2, gl.FLOAT, gl.Sizei(size), gl.Pointer(unsafe.Offsetof(strbuf.vs[0].u)))

		gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, gl.Uint(strbuf.ibuffer))
		gl.DrawElements(gl.TRIANGLES, gl.Sizei(len(strbuf.is)), gl.UNSIGNED_SHORT, nil)

		gl.DisableClientState(gl.VERTEX_ARRAY)
		gl.DisableClientState(gl.TEXTURE_COORD_ARRAY)
		return
	}
	x_pos = 0
	for _, r := range s {
		info := d.getInfo(r)
		xleft := x_pos + float32(info.Bounds.Min.X)
		xright := x_pos + float32(info.Bounds.Max.X)
		ytop := float32(d.data.Maxy - info.Bounds.Min.Y)
		ybot := float32(height) + float32(d.data.Miny-info.Bounds.Max.Y)
		start := uint16(len(strbuf.vs))
		strbuf.is = append(strbuf.is, start+0)
		strbuf.is = append(strbuf.is, start+1)
		strbuf.is = append(strbuf.is, start+2)
		strbuf.is = append(strbuf.is, start+0)
		strbuf.is = append(strbuf.is, start+2)
		strbuf.is = append(strbuf.is, start+3)
		strbuf.vs = append(strbuf.vs, dictVert{
			x: xleft,
			y: ybot,
			u: float32(info.Pos.Min.X) / float32(d.data.Dx),
			v: float32(info.Pos.Max.Y) / float32(d.data.Dy),
		})
		strbuf.vs = append(strbuf.vs, dictVert{
			x: xleft,
			y: ytop,
			u: float32(info.Pos.Min.X) / float32(d.data.Dx),
			v: float32(info.Pos.Min.Y) / float32(d.data.Dy),
		})
		strbuf.vs = append(strbuf.vs, dictVert{
			x: xright,
			y: ytop,
			u: float32(info.Pos.Max.X) / float32(d.data.Dx),
			v: float32(info.Pos.Min.Y) / float32(d.data.Dy),
		})
		strbuf.vs = append(strbuf.vs, dictVert{
			x: xright,
			y: ybot,
			u: float32(info.Pos.Max.X) / float32(d.data.Dx),
			v: float32(info.Pos.Max.Y) / float32(d.data.Dy),
		})
		x_pos += float32(info.Advance)
	}
	gl.GenBuffers(1, (*gl.Uint)(&strbuf.vbuffer))
	gl.BindBuffer(gl.ARRAY_BUFFER, gl.Uint(strbuf.vbuffer))
	gl.BufferData(gl.ARRAY_BUFFER, gl.Sizeiptr(int(size)*len(strbuf.vs)), gl.Pointer(&strbuf.vs[0].x), gl.STATIC_DRAW)

	gl.GenBuffers(1, (*gl.Uint)(&strbuf.ibuffer))
	gl.BindBuffer(gl.ELEMENT_ARRAY_BUFFER, gl.Uint(strbuf.ibuffer))
	gl.BufferData(gl.ELEMENT_ARRAY_BUFFER, gl.Sizeiptr(int(unsafe.Sizeof(strbuf.is[0]))*len(strbuf.is)), gl.Pointer(&strbuf.is[0]), gl.STATIC_DRAW)
	d.strs[s] = strbuf
}