def _get_active_attributes(self):
""" Extract active attributes from GPU """
count = gl.glGetProgramiv(self.handle, gl.GL_ACTIVE_ATTRIBUTES)
attributes = []
# This match a name of the form "name[size]" (= array)
regex = re.compile("""(?P<name>\w+)\s*(\[(?P<size>\d+)\])""")
for i in range(count):
name, size, gtype = gl.glGetActiveAttrib(self.handle, i)
# This checks if the attribute is an array
# Name will be something like xxx[0] instead of xxx
m = regex.match(name)
# When attribute is an array, size corresponds to the highest used index
if m:
name = m.group('name')
if size >= 1:
for i in range(size):
name = '%s[%d]' % (m.group('name'),i)
attributes.append((name, gtype))
else:
attributes.append((name, gtype))
return attributes
def _get_active_attributes(self):
""" Extract active attributes from GPU """
count = gl.glGetProgramiv(self.handle, gl.GL_ACTIVE_ATTRIBUTES)
attributes = []
# This match a name of the form "name[size]" (= array)
regex = re.compile("""(?P<name>\w+)\s*(\[(?P<size>\d+)\])""")
for i in range(count):
name, size, gtype = gl.glGetActiveAttrib(self.handle, i)
# This checks if the attribute is an array
# Name will be something like xxx[0] instead of xxx
m = regex.match(name)
# When attribute is an array, size corresponds to the highest used index
if m:
name = m.group('name')
if size >= 1:
for i in range(size):
name = '%s[%d]' % (m.group('name'),i)
attributes.append((name, gtype))
else:
attributes.append((name, gtype))
return attributes
def _get_active_uniforms(self):
""" Extract active uniforms from GPU """
count = gl.glGetProgramiv(self.handle, gl.GL_ACTIVE_UNIFORMS)
# This match a name of the form "name[size]" (= array)
regex = re.compile("""(?P<name>\w+)\s*(\[(?P<size>\d+)\])\s*""")
uniforms = []
for i in range(count):
name, size, gtype = gl.glGetActiveUniform(self.handle, i)
name = name.decode()
# This checks if the uniform is an array
# Name will be something like xxx[0] instead of xxx
m = regex.match(name)
# When uniform is an array, size corresponds to the highest used index
if m:
name = m.group("name")
if size >= 1:
for i in range(size):
name = "%s[%d]" % (m.group("name"), i)
uniforms.append((name, gtype))
else:
uniforms.append((name, gtype))
return uniforms
def active_attributes(self):
"""
List of active attributes requested from GPU (read only).
.. note::
An inactive attribute is an attribute that has been declared
but that is not actually used in the shader.
Example:
.. code::
attribute vec3 normal; # Inactive
attribute vec3 position; # Active
void main() {
gl_Position = vec4(position, 1.0);
}
"""
count = gl.glGetProgramiv(self.handle, gl.GL_ACTIVE_ATTRIBUTES)
attributes = []
# This match a name of the form "name[size]" (= array)
regex = re.compile("""(?P<name>\w+)\s*(\[(?P<size>\d+)\])""")
for i in range(count):
name, size, gtype = gl.glGetActiveAttrib(self.handle, i)
name = name.decode()
# This checks if the attribute is an array
# Name will be something like xxx[0] instead of xxx
m = regex.match(name)
# When attribute is an array, size corresponds to the highest used index
if m:
name = m.group('name')
if size >= 1:
for i in range(size):
name = '%s[%d]' % (m.group('name'), i)
attributes.append((name, gtype))
else:
attributes.append((name, gtype))
return attributes
def active_attributes(self):
"""
List of active attributes requested from GPU (read only).
.. note::
An inactive attribute is an attribute that has been declared
but that is not actually used in the shader.
Example:
.. code::
attribute vec3 normal; # Inactive
attribute vec3 position; # Active
void main() {
gl_Position = vec4(position, 1.0);
}
"""
count = gl.glGetProgramiv(self.handle, gl.GL_ACTIVE_ATTRIBUTES)
attributes = []
# This match a name of the form "name[size]" (= array)
regex = re.compile("""(?P<name>\w+)\s*(\[(?P<size>\d+)\])""")
for i in range(count):
name, size, gtype = gl.glGetActiveAttrib(self.handle, i)
name = name.decode()
# This checks if the attribute is an array
# Name will be something like xxx[0] instead of xxx
m = regex.match(name)
# When attribute is an array, size corresponds to the highest used index
if m:
name = m.group('name')
if size >= 1:
for i in range(size):
name = '%s[%d]' % (m.group('name'),i)
attributes.append((name, gtype))
else:
attributes.append((name, gtype))
return attributes
def active_uniforms(self):
"""
List of active uniform requested from GPU (read only).
.. note::
An inactive uniform is a uniform that has been declared but that is
not actually used in the shader.
Example:
.. code::
uniform vec3 color; # Inactive
void main() {
gl_FragColor = vec4(1.0, 1.0, 1.0, 1.0);
}
"""
count = gl.glGetProgramiv(self.handle, gl.GL_ACTIVE_UNIFORMS)
# This match a name of the form "name[size]" (= array)
regex = re.compile("""(?P<name>\w+)\s*(\[(?P<size>\d+)\])\s*""")
uniforms = []
for i in range(count):
name, size, gtype = gl.glGetActiveUniform(self.handle, i)
name = name.decode()
# This checks if the uniform is an array
# Name will be something like xxx[0] instead of xxx
m = regex.match(name)
# When uniform is an array, size corresponds to the highest used index
if m:
name = m.group('name')
if size >= 1:
for i in range(size):
name = '%s[%d]' % (m.group('name'), i)
uniforms.append((name, gtype))
else:
uniforms.append((name, gtype))
return uniforms
def active_uniforms(self):
"""
List of active uniform requested from GPU (read only).
.. note::
An inactive uniform is a uniform that has been declared but that is
not actually used in the shader.
Example:
.. code::
uniform vec3 color; # Inactive
void main() {
gl_FragColor = vec4(1.0, 1.0, 1.0, 1.0);
}
"""
count = gl.glGetProgramiv(self.handle, gl.GL_ACTIVE_UNIFORMS)
# This match a name of the form "name[size]" (= array)
regex = re.compile("""(?P<name>\w+)\s*(\[(?P<size>\d+)\])\s*""")
uniforms = []
for i in range(count):
name, size, gtype = gl.glGetActiveUniform(self.handle, i)
name = name.decode()
# This checks if the uniform is an array
# Name will be something like xxx[0] instead of xxx
m = regex.match(name)
# When uniform is an array, size corresponds to the highest used index
if m:
name = m.group('name')
if size >= 1:
for i in range(size):
name = '%s[%d]' % (m.group('name'),i)
uniforms.append((name, gtype))
else:
uniforms.append((name, gtype))
return uniforms
def _create(self):
"""
Build (link) the program and checks everything's ok.
A GL context must be available to be able to build (link)
"""
log.debug("GPU: Creating program")
# Check if program has been created
if self._handle <= 0:
self._handle = gl.glCreateProgram()
if not self._handle:
raise ValueError("Cannot create program object")
self._build_shaders(self._handle)
log.debug("GPU: Linking program")
# Link the program
gl.glLinkProgram(self._handle)
if not gl.glGetProgramiv(self._handle, gl.GL_LINK_STATUS):
print(gl.glGetProgramInfoLog(self._handle))
raise ValueError('Linking error')
# Activate uniforms
active_uniforms = [name for (name, gtype) in self.active_uniforms]
for uniform in self._uniforms.values():
if uniform.name in active_uniforms:
uniform.active = True
else:
uniform.active = False
# Activate attributes
active_attributes = [name for (name, gtype) in self.active_attributes]
for attribute in self._attributes.values():
if attribute.name in active_attributes:
attribute.active = True
else:
attribute.active = False
def _create(self):
"""
Build (link) the program and checks everything's ok.
A GL context must be available to be able to build (link)
"""
log.debug("GPU: Creating program")
# Check if program has been created
if self._handle <= 0:
self._handle = gl.glCreateProgram()
if not self._handle:
raise ValueError("Cannot create program object")
self._build_shaders(self._handle)
log.debug("GPU: Linking program")
# Link the program
gl.glLinkProgram(self._handle)
if not gl.glGetProgramiv(self._handle, gl.GL_LINK_STATUS):
print(gl.glGetProgramInfoLog(self._handle))
raise ValueError('Linking error')
# Activate uniforms
active_uniforms = [name for (name,gtype) in self.active_uniforms]
for uniform in self._uniforms.values():
if uniform.name in active_uniforms:
uniform.active = True
else:
uniform.active = False
# Activate attributes
active_attributes = [name for (name,gtype) in self.active_attributes]
for attribute in self._attributes.values():
if attribute.name in active_attributes:
attribute.active = True
else:
attribute.active = False
