def lut3d(cfg, xsplit=.3, trilinear=True):
'''Lookup Table 3D using a Texture3D'''
level = 6
level2 = level**2
# Generated with `ffmpeg -f lavfi -i haldclutsrc=6,curves=vintage -f
# rawvideo -frames:v 1 lut3d.raw`
lut3d_filename = op.join(op.dirname(__file__), 'data', 'lut3d.raw')
cfg.files.append(lut3d_filename)
lut3d_buf = ngl.BufferUBVec3(filename=lut3d_filename)
lut3d_tex = ngl.Texture3D(data_src=lut3d_buf,
width=level2, height=level2, depth=level2)
if trilinear:
lut3d_tex.set_min_filter('linear')
lut3d_tex.set_mag_filter('linear')
m0 = cfg.medias[0]
cfg.duration = m0.duration
cfg.aspect_ratio = (m0.width, m0.height)
video = ngl.Media(m0.filename)
video_tex = ngl.Texture2D(data_src=video)
shader_version = '300 es' if cfg.backend == 'gles' else '330'
shader_header = '#version %s\n' % shader_version
prog = ngl.Program(fragment=shader_header + cfg.get_frag('lut3d'),
vertex=shader_header + cfg.get_vert('lut3d'))
quad = ngl.Quad((-1, -1, 0), (2, 0, 0), (0, 2, 0))
render = ngl.Render(quad, prog)
render.update_textures(tex0=video_tex)
render.update_textures(lut3d=lut3d_tex)
render.update_uniforms(xsplit=ngl.UniformFloat(value=xsplit))
return render
def lut3d(cfg, xsplit=0.3, trilinear=True):
"""Lookup Table 3D using a Texture3D"""
level = 6
level2 = level**2
# Generated with `ffmpeg -f lavfi -i haldclutsrc=6,curves=vintage,format=rgba
# -f rawvideo -frames:v 1 lut3d.raw`
lut3d_filename = op.join(op.dirname(__file__), "data", "lut3d.raw")
cfg.files.append(lut3d_filename)
lut3d_buf = ngl.BufferUBVec4(filename=lut3d_filename)
lut3d_tex = ngl.Texture3D(data_src=lut3d_buf,
width=level2,
height=level2,
depth=level2)
if trilinear:
lut3d_tex.set_min_filter("linear")
lut3d_tex.set_mag_filter("linear")
m0 = cfg.medias[0]
cfg.duration = m0.duration
cfg.aspect_ratio = (m0.width, m0.height)
video = ngl.Media(m0.filename)
video_tex = ngl.Texture2D(data_src=video)
scene_tex = ngl.RenderTexture(video_tex)
quad = ngl.Quad((-1, -1, 0), (2, 0, 0), (0, 2, 0))
prog_lut = ngl.Program(fragment=cfg.get_frag("lut3d"),
vertex=cfg.get_vert("lut3d"))
prog_lut.update_vert_out_vars(var_uvcoord=ngl.IOVec2(),
var_tex0_coord=ngl.IOVec2())
scene_lut = ngl.Render(quad, prog_lut)
scene_lut.update_frag_resources(tex0=video_tex, lut3d=lut3d_tex)
return compare(cfg, scene_tex, scene_lut, xsplit)
def lut3d(cfg, xsplit=.3, trilinear=True):
'''Lookup Table 3D using a Texture3D'''
level = 6
level2 = level**2
# Generated with `ffmpeg -f lavfi -i haldclutsrc=6,curves=vintage,format=rgba
# -f rawvideo -frames:v 1 lut3d.raw`
lut3d_filename = op.join(op.dirname(__file__), 'data', 'lut3d.raw')
cfg.files.append(lut3d_filename)
lut3d_buf = ngl.BufferUBVec4(filename=lut3d_filename)
lut3d_tex = ngl.Texture3D(data_src=lut3d_buf,
width=level2,
height=level2,
depth=level2)
if trilinear:
lut3d_tex.set_min_filter('linear')
lut3d_tex.set_mag_filter('linear')
m0 = cfg.medias[0]
cfg.duration = m0.duration
cfg.aspect_ratio = (m0.width, m0.height)
video = ngl.Media(m0.filename)
video_tex = ngl.Texture2D(data_src=video)
prog = ngl.Program(fragment=cfg.get_frag('lut3d'),
vertex=cfg.get_vert('lut3d'))
prog.update_vert_out_vars(var_uvcoord=ngl.IOVec2(),
var_tex0_coord=ngl.IOVec2())
quad = ngl.Quad((-1, -1, 0), (2, 0, 0), (0, 2, 0))
render = ngl.Render(quad, prog)
render.update_frag_resources(tex0=video_tex, lut3d=lut3d_tex)
render.update_frag_resources(xsplit=ngl.UniformFloat(value=xsplit))
return render
def texture_3d(cfg):
random.seed(0)
width, height, depth = 9, 9, 3
n = width * height
data = array.array('B')
for i in random.sample(range(n), n):
data.extend([i * 255 // n, 0, 0, 255])
for i in random.sample(range(n), n):
data.extend([0, i * 255 // n, 0, 255])
for i in random.sample(range(n), n):
data.extend([0, 0, i * 255 // n, 255])
texture_buffer = ngl.BufferUBVec4(data=data)
texture = ngl.Texture3D(width=width,
height=height,
depth=depth,
data_src=texture_buffer)
glsl_version = '300 es' if cfg.backend == 'gles' else '330'
glsl_header = '#version %s\n' % glsl_version
render_cubemap_vert = glsl_header + _TEXTURE3D_VERT
render_cubemap_frag = glsl_header + _TEXTURE3D_FRAG
quad = ngl.Quad((-1, -1, 0), (2, 0, 0), (0, 2, 0))
program = ngl.Program(vertex=render_cubemap_vert,
fragment=render_cubemap_frag)
render = ngl.Render(quad, program)
render.update_textures(tex0=texture)
return render
def texture_3d(cfg):
width, height, depth = 9, 9, 3
n = width * height
data = array.array("B")
for i in cfg.rng.sample(range(n), n):
data.extend([i * 255 // n, 0, 0, 255])
for i in cfg.rng.sample(range(n), n):
data.extend([0, i * 255 // n, 0, 255])
for i in cfg.rng.sample(range(n), n):
data.extend([0, 0, i * 255 // n, 255])
texture_buffer = ngl.BufferUBVec4(data=data)
texture = ngl.Texture3D(width=width,
height=height,
depth=depth,
data_src=texture_buffer)
quad = ngl.Quad((-1, -1, 0), (2, 0, 0), (0, 2, 0))
program = ngl.Program(vertex=_TEXTURE3D_VERT, fragment=_TEXTURE3D_FRAG)
program.update_vert_out_vars(var_uvcoord=ngl.IOVec2())
render = ngl.Render(quad, program)
render.update_frag_resources(tex0=texture)
return render
