def histogram(cfg):
"""Histogram using compute shaders"""
m0 = cfg.medias[0]
cfg.duration = m0.duration
cfg.aspect_ratio = (m0.width, m0.height)
g = ngl.Group()
m = ngl.Media(cfg.medias[0].filename)
t = ngl.Texture2D(data_src=m)
h = ngl.Block(label="histogram_block", layout="std430")
h.add_fields(
ngl.BufferUInt(256, label="r"),
ngl.BufferUInt(256, label="g"),
ngl.BufferUInt(256, label="b"),
ngl.UniformUInt(label="maximum"),
)
r = ngl.RenderTexture(t)
proxy_size = 128
proxy = ngl.Texture2D(width=proxy_size, height=proxy_size)
rtt = ngl.RenderToTexture(r)
rtt.add_color_textures(proxy)
g.add_children(rtt)
compute_program = ngl.ComputeProgram(cfg.get_comp("histogram-clear"),
workgroup_size=(1, 1, 1))
compute_program.update_properties(hist=ngl.ResourceProps(writable=True))
compute = ngl.Compute(workgroup_count=(256, 1, 1),
program=compute_program,
label="histogram-clear")
compute.update_resources(hist=h)
g.add_children(compute)
local_size = 8
group_size = proxy_size / local_size
compute_program = ngl.ComputeProgram(cfg.get_comp("histogram-exec"),
workgroup_size=(local_size,
local_size, 1))
compute = ngl.Compute(workgroup_count=(group_size, group_size, 1),
program=compute_program,
label="histogram-exec")
compute.update_resources(hist=h, source=proxy)
compute_program.update_properties(hist=ngl.ResourceProps(writable=True))
compute_program.update_properties(source=ngl.ResourceProps(as_image=True))
g.add_children(compute)
q = ngl.Quad((-1, -1, 0), (2, 0, 0), (0, 2, 0))
p = ngl.Program(vertex=cfg.get_vert("histogram-display"),
fragment=cfg.get_frag("histogram-display"))
p.update_vert_out_vars(var_uvcoord=ngl.IOVec2(),
var_tex0_coord=ngl.IOVec2())
render = ngl.Render(q, p)
render.update_frag_resources(tex0=t, hist=h)
g.add_children(render)
return g
def histogram(cfg):
'''Histogram using compute shaders'''
m0 = cfg.medias[0]
cfg.duration = m0.duration
cfg.aspect_ratio = (m0.width, m0.height)
g = ngl.Group()
m = ngl.Media(cfg.medias[0].filename)
t = ngl.Texture2D(data_src=m)
h = ngl.Block(label='histogram_block', layout='std430')
h.add_fields(
ngl.BufferUInt(256, label='r'),
ngl.BufferUInt(256, label='g'),
ngl.BufferUInt(256, label='b'),
ngl.UniformInt(label='maximum'),
)
q = ngl.Quad((-1, -1, 0), (2, 0, 0), (0, 2, 0))
r = ngl.Render(q)
r.update_textures(tex0=t)
proxy_size = 128
proxy = ngl.Texture2D(width=proxy_size, height=proxy_size)
rtt = ngl.RenderToTexture(r)
rtt.add_color_textures(proxy)
g.add_children(rtt)
shader_version = '310 es' if cfg.backend == 'gles' else '430'
shader_header = '#version %s\n' % shader_version
if cfg.backend == 'gles' and cfg.system == 'Android':
shader_header += '#extension GL_ANDROID_extension_pack_es31a: require\n'
compute_program = ngl.ComputeProgram(shader_header + cfg.get_comp('histogram-clear'))
compute = ngl.Compute(256, 1, 1, compute_program, label='histogram-clear')
compute.update_blocks(histogram_buffer=h)
g.add_children(compute)
local_size = 8
group_size = proxy_size / local_size
compute_shader = cfg.get_comp('histogram-exec') % {'local_size': local_size}
compute_program = ngl.ComputeProgram(shader_header + compute_shader)
compute = ngl.Compute(group_size, group_size, 1, compute_program, label='histogram-exec')
compute.update_blocks(histogram_buffer=h)
compute.update_textures(source=proxy)
g.add_children(compute)
q = ngl.Quad((-1, -1, 0), (2, 0, 0), (0, 2, 0))
p = ngl.Program(vertex=shader_header + cfg.get_vert('histogram-display'),
fragment=shader_header + cfg.get_frag('histogram-display'))
render = ngl.Render(q, p)
render.update_textures(tex0=t)
render.update_blocks(histogram_buffer=h)
g.add_children(render)
return g
def compute_histogram(cfg, show_dbg_points=False):
cfg.duration = 10
cfg.aspect_ratio = (1, 1)
hsize, size, local_size = _N * _N, _N, _N // 2
data = array.array("f")
for i in range(size * size):
data.extend((
cfg.rng.uniform(0.0, 0.5),
cfg.rng.uniform(0.25, 0.75),
cfg.rng.uniform(0.5, 1.0),
1.0,
))
texture_buffer = ngl.BufferVec4(data=data)
texture = ngl.Texture2D(width=size, height=size, data_src=texture_buffer)
texture.set_format("r32g32b32a32_sfloat")
histogram_block = ngl.Block(layout="std140", label="histogram")
histogram_block.add_fields(
ngl.BufferUInt(hsize, label="r"),
ngl.BufferUInt(hsize, label="g"),
ngl.BufferUInt(hsize, label="b"),
ngl.UniformUIVec3(label="max"),
)
shader_params = dict(hsize=hsize, size=size, local_size=local_size)
group_size = hsize // local_size
clear_histogram_shader = _COMPUTE_HISTOGRAM_CLEAR % shader_params
clear_histogram_program = ngl.ComputeProgram(clear_histogram_shader,
workgroup_size=(local_size, 1,
1))
clear_histogram_program.update_properties(hist=ngl.ResourceProps(
writable=True))
clear_histogram = ngl.Compute(
workgroup_count=(group_size, 1, 1),
program=clear_histogram_program,
label="clear_histogram",
)
clear_histogram.update_resources(hist=histogram_block)
group_size = size // local_size
exec_histogram_shader = _COMPUTE_HISTOGRAM_EXEC % shader_params
exec_histogram_program = ngl.ComputeProgram(exec_histogram_shader,
workgroup_size=(local_size,
local_size, 1))
exec_histogram_program.update_properties(hist=ngl.ResourceProps(
writable=True))
exec_histogram = ngl.Compute(workgroup_count=(group_size, group_size, 1),
program=exec_histogram_program,
label="compute_histogram")
exec_histogram.update_resources(hist=histogram_block, source=texture)
exec_histogram_program.update_properties(source=ngl.ResourceProps(
as_image=True))
quad = ngl.Quad((-1, -1, 0), (2, 0, 0), (0, 2, 0))
program = ngl.Program(
vertex=_RENDER_HISTOGRAM_VERT,
fragment=_RENDER_HISTOGRAM_FRAG % shader_params,
)
program.update_vert_out_vars(var_uvcoord=ngl.IOVec2())
render = ngl.Render(quad, program, label="render_histogram")
render.update_frag_resources(hist=histogram_block)
group = ngl.Group(children=(clear_histogram, exec_histogram, render))
if show_dbg_points:
cuepoints = _get_compute_histogram_cuepoints()
group.add_children(get_debug_points(cfg, cuepoints))
return group
def histogram(cfg):
'''Histogram using compute shaders'''
m0 = cfg.medias[0]
cfg.duration = m0.duration
cfg.aspect_ratio = (m0.width, m0.height)
g = ngl.Group()
m = ngl.Media(cfg.medias[0].filename)
t = ngl.Texture2D(data_src=m)
h = ngl.Block(label='histogram_block', layout='std430')
h.add_fields(
ngl.BufferUInt(256, label='r'),
ngl.BufferUInt(256, label='g'),
ngl.BufferUInt(256, label='b'),
ngl.UniformUInt(label='maximum'),
)
q = ngl.Quad((-1, -1, 0), (2, 0, 0), (0, 2, 0))
p = ngl.Program(vertex=cfg.get_vert('texture'),
fragment=cfg.get_frag('texture'))
p.update_vert_out_vars(var_uvcoord=ngl.IOVec2(),
var_tex0_coord=ngl.IOVec2())
r = ngl.Render(q, p)
r.update_frag_resources(tex0=t)
proxy_size = 128
proxy = ngl.Texture2D(width=proxy_size, height=proxy_size)
rtt = ngl.RenderToTexture(r)
rtt.add_color_textures(proxy)
g.add_children(rtt)
compute_program = ngl.ComputeProgram(cfg.get_comp('histogram-clear'))
compute = ngl.Compute(256, 1, 1, compute_program, label='histogram-clear')
compute.update_resources(hist=h)
g.add_children(compute)
local_size = 8
group_size = proxy_size / local_size
compute_shader = cfg.get_comp('histogram-exec') % {
'local_size': local_size
}
compute_program = ngl.ComputeProgram(compute_shader)
compute = ngl.Compute(group_size,
group_size,
1,
compute_program,
label='histogram-exec')
compute.update_resources(hist=h, source=proxy)
compute_program.update_properties(source=ngl.ResourceProps(as_image=True))
g.add_children(compute)
q = ngl.Quad((-1, -1, 0), (2, 0, 0), (0, 2, 0))
p = ngl.Program(vertex=cfg.get_vert('histogram-display'),
fragment=cfg.get_frag('histogram-display'))
p.update_vert_out_vars(var_uvcoord=ngl.IOVec2(),
var_tex0_coord=ngl.IOVec2())
render = ngl.Render(q, p)
render.update_frag_resources(tex0=t, hist=h)
g.add_children(render)
return g
def compute_histogram(cfg, show_dbg_points=False):
random.seed(0)
cfg.duration = 10
cfg.aspect_ratio = (1, 1)
hsize, size, local_size = _N * _N, _N, _N // 2
data = array.array('f')
for i in range(size * size):
data.extend((
random.uniform(0.0, 0.5),
random.uniform(0.25, 0.75),
random.uniform(0.5, 1.0),
1.0,
))
texture_buffer = ngl.BufferVec4(data=data)
texture = ngl.Texture2D(width=size, height=size, data_src=texture_buffer)
histogram_block = ngl.Block(layout='std430', label='histogram')
histogram_block.add_fields(
ngl.BufferUInt(hsize),
ngl.BufferUInt(hsize),
ngl.BufferUInt(hsize),
ngl.UniformUIVec3(),
)
shader_version = '310 es' if cfg.backend == 'gles' else '430'
shader_header = '#version %s\n' % shader_version
if cfg.backend == 'gles' and cfg.system == 'Android':
shader_header += '#extension GL_ANDROID_extension_pack_es31a: require\n'
shader_params = dict(hsize=hsize, size=size, local_size=local_size)
group_size = hsize // local_size
clear_histogram_shader = _COMPUTE_HISTOGRAM_CLEAR % shader_params
clear_histogram_program = ngl.ComputeProgram(shader_header + clear_histogram_shader)
clear_histogram = ngl.Compute(
group_size,
1,
1,
clear_histogram_program,
label='clear_histogram',
)
clear_histogram.update_blocks(histogram=histogram_block)
group_size = size // local_size
exec_histogram_shader = _COMPUTE_HISTOGRAM_EXEC % shader_params
exec_histogram_program = ngl.ComputeProgram(shader_header + exec_histogram_shader)
exec_histogram = ngl.Compute(
group_size,
group_size,
1,
exec_histogram_program,
label='compute_histogram'
)
exec_histogram.update_blocks(histogram=histogram_block)
exec_histogram.update_textures(source=texture)
quad = ngl.Quad((-1, -1, 0), (2, 0, 0), (0, 2, 0))
program = ngl.Program(
vertex=shader_header + _RENDER_HISTOGRAM_VERT,
fragment=shader_header + _RENDER_HISTOGRAM_FRAG % shader_params,
)
render = ngl.Render(quad, program, label='render_histogram')
render.update_blocks(histogram=histogram_block)
group = ngl.Group(children=(clear_histogram, exec_histogram, render,))
if show_dbg_points:
cuepoints = _get_compute_histogram_cuepoints()
group.add_children(get_debug_points(cfg, cuepoints))
return group