program.draw(gl.GL_TRIANGLE_STRIP)
@window.event
def on_resize(width, height):
gl.glViewport(0, 0, width, height)
@window.event
def on_mouse_scroll(x, y, dx, dy):
scale = program["scale"][0]
program["scale"] = min(max(0.1, scale + .01 * dy * scale), 1)
program = gloo.Program("sdf.vert", ["spatial-filters.frag", "sdf-2.frag"], count=4)
program['position'] = [(-1,-1), (-1,+1), (+1,-1), (+1,+1)]
font = Font("Vera.ttf")
font.load("abcdefghijklmnopqrstuvwxyz")
font.load("ABCDEFGHIJKLMNOPQRSTUVWXYZ")
program['texcoord'] = [( 0, 1), ( 0, 0), ( 1, 1), ( 1, 0)]
program['u_kernel'] = np.load("spatial-filters.npy")
program['tex_data'] = font.atlas
program['tex_data'].interpolation = gl.GL_LINEAR
program['tex_shape'] = font.atlas.shape[1],font.atlas.shape[0]
program['color'] = 0,0,0,1
program['scale'] = 1.0
gl.glClearColor(1.0, 1.0, 1.0, 1.0)
gl.glDisable(gl.GL_DEPTH_TEST)
gl.glEnable(gl.GL_BLEND)
gl.glBlendFunc(gl.GL_SRC_ALPHA, gl.GL_ONE_MINUS_SRC_ALPHA)
