def api_text_live_change(width=320, height=240):
import zlib
ctx = ngl.Context()
capture_buffer = bytearray(width * height * 4)
ret = ctx.configure(offscreen=1, width=width, height=height, backend=_backend, capture_buffer=capture_buffer)
assert ret == 0
# An empty string forces the text node to deal with a pipeline with nul
# attributes, this is what we exercise here, along with a varying up and
# down number of characters
text_strings = ["foo", "", "foobar", "world", "hello\nworld", "\n\n", "last"]
# Exercise the diamond-form/prepare mechanism
text_node = ngl.Text()
assert ctx.set_scene(autogrid_simple([text_node] * 4)) == 0
ctx.draw(0)
last_crc = zlib.crc32(capture_buffer)
for i, s in enumerate(text_strings, 1):
text_node.set_text(s)
ctx.draw(i)
crc = zlib.crc32(capture_buffer)
assert crc != last_crc
last_crc = crc
def shape_diamond_colormask(cfg):
color_write_masks = ('r+g+b+a', 'r+g+a', 'g+b+a', 'r+b+a')
geometry = ngl.Circle(npoints=5)
prog = ngl.Program(vertex=cfg.get_vert('color'), fragment=cfg.get_frag('color'))
render = ngl.Render(geometry, prog)
render.update_frag_resources(color=ngl.UniformVec4(value=COLORS['white']))
scenes = [ngl.GraphicConfig(render, color_write_mask=cwm) for cwm in color_write_masks]
return autogrid_simple(scenes)
def shape_diamond_colormask(_):
color_write_masks = ("r+g+b+a", "r+g+a", "g+b+a", "r+b+a")
geometry = ngl.Circle(npoints=5)
render = ngl.RenderColor(COLORS.white, geometry=geometry)
scenes = [
ngl.GraphicConfig(render, color_write_mask=cwm)
for cwm in color_write_masks
]
return autogrid_simple(scenes)
def compositing_all_operators(cfg):
scenes = []
for op in _OPERATORS:
scene = _get_compositing_scene(cfg, op, show_label=True)
scenes.append(scene)
return autogrid_simple(scenes)
def blending_all_diamond(cfg, show_dbg_points=True, show_labels=True):
scenes = _get_blending_scenes(cfg)
scene = autogrid_simple(scenes)
return _debug_overlay(cfg, scene, _BLENDINGS, show_dbg_points, show_labels)