Example #1
0
func initMaxValues() {
	gl_state.framebufferSRGBEnabled = gl.IsEnabled(gl.FRAMEBUFFER_SRGB)
	gl.GetFloatv(gl.POINT_SIZE, &states.back().pointSize)
	gl.GetFloatv(gl.MAX_TEXTURE_MAX_ANISOTROPY_EXT, &maxAnisotropy)
	gl.GetIntegerv(gl.MAX_TEXTURE_SIZE, &maxTextureSize)
	gl.GetIntegerv(gl.MAX_SAMPLES, &maxRenderbufferSamples)
	gl.GetIntegerv(gl.MAX_COMBINED_TEXTURE_IMAGE_UNITS, &maxTextureUnits)
	gl_state.textureCounters = make([]int, maxTextureUnits)
	gl.GetIntegerv(gl.MAX_DRAW_BUFFERS, &maxRenderTargets)
	var maxattachments int32
	gl.GetIntegerv(gl.MAX_COLOR_ATTACHMENTS, &maxattachments)
	if maxattachments < maxRenderTargets {
		maxRenderTargets = maxattachments
	}
}
Example #2
0
func (texture *Texture) SetMipmapSharpness(sharpness float32) {
	var maxMipmapSharpness float32
	gl.GetFloatv(gl.MAX_TEXTURE_LOD_BIAS, &maxMipmapSharpness)
	mipmapSharpness := math.Min(math.Max(float64(sharpness), -float64(maxMipmapSharpness+0.01)), float64(maxMipmapSharpness-0.01))
	bindTexture(texture.getHandle())
	//negative bias is sharper
	gl.TexParameterf(gl.TEXTURE_2D, gl.TEXTURE_LOD_BIAS, -float32(mipmapSharpness))
}
Example #3
0
func (t *Transform) update() {
	gl.LoadMatrixf(&(t.parent.matrix[0]))
	gl.Translatef(t.position.X, t.position.Y, 0)
	gl.Rotatef(t.rotation, 0, 0, -1)
	gl.GetFloatv(gl.MODELVIEW_MATRIX, &(t.parent.matrix[0]))

	for _, c := range t.children {
		c.update()
	}
}
Example #4
0
func (t *Transform) Update() {
	var m *float32
	if t.parentTransform != nil {
		m = &(t.parentTransform.Matrix[0])
	} else {
		m = &(t.Matrix[0])
	}

	gl.LoadMatrixf(m)
	gl.Translatef(t.position.X, t.position.Y, 0)
	gl.Rotatef(t.rotation, 0, 0, -1)
	gl.GetFloatv(gl.MODELVIEW_MATRIX, &(t.Matrix[0]))
	t.NeedsUpdate = false

	for _, c := range t.childTransforms {
		c.Update()
	}
}
Example #5
0
// GetFloatv returns the float values of parameter pname.
//
// http://www.khronos.org/opengles/sdk/docs/man3/html/glGet.xhtml
func GetFloatv(dst []float32, pname Enum) {
	gl.GetFloatv(uint32(pname), &dst[0])
}
Example #6
0
File: font.go Project: go-gl/gltext
// 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()
}