// Bind binds the texture
func (t *Texture) Bind(coordType CoordType) {
// ensureGlContext()
if t != nil && t.t != 0 {
// Bind the texture
t.t.Bind(gl.TEXTURE_2D)
// Check if we need to define a special texture matrix
if coordType == CoordPixels || t.pixelsFlipped {
matrix := [16]float32{1, 0, 0, 0,
0, 1, 0, 0,
0, 0, 1, 0,
0, 0, 0, 1}
// If non-normalized coordinates (= pixels) are requested, we need to
// setup scale factors that convert the range [0 .. size] to [0 .. 1]
if coordType == CoordPixels {
matrix[0] = 1.0 / t.size.X
matrix[5] = 1.0 / t.size.Y
}
// If pixels are flipped we must invert the Y axis
if t.pixelsFlipped {
matrix[5] = -matrix[5]
matrix[13] = 1.0
}
// Load the matrix
gl.MatrixMode(gl.TEXTURE)
gl.LoadMatrixf(&matrix)
// Go back to model-view mode (sf::RenderTarget relies on it)
gl.MatrixMode(gl.MODELVIEW)
}
} else {
// Bind no texture
gl.Texture(0).Unbind(gl.TEXTURE_2D)
// Reset the texture matrix
gl.MatrixMode(gl.TEXTURE)
gl.LoadIdentity()
// Go back to model-view mode (sf::RenderTarget relies on it)
gl.MatrixMode(gl.MODELVIEW)
}
}
func (r *RenderTarget) applyCurrentView() {
// Set the viewport
viewport := r.Viewport(r.view)
top := r.Size.Y - (viewport.Top + viewport.H)
gl.Viewport(int(viewport.Left), int(top), int(viewport.W), int(viewport.H))
mat := r.view.Transform().Matrix
// Set the projection matrix
gl.MatrixMode(gl.PROJECTION)
gl.LoadMatrixf(&mat)
// Go back to model-view mode
gl.MatrixMode(gl.MODELVIEW)
r.viewChanged = false
}
func (r *RenderTarget) applyTransform(transform Transform) {
// No need to call glMatrixMode(gl.MODELVIEW), it is always the
// current mode (for optimization purpose, since it's the most used)
gl.LoadMatrixf(&transform.Matrix)
}