def _link(self):
for shader in self:
gl.glAttachShader(self.handle, shader.handle);
# link the program
gl.glLinkProgram(self.handle)
temp = c_int(0)
# retrieve the link status
gl.glGetProgramiv(self.handle, gl.GL_LINK_STATUS, byref(temp))
# if linking failed, print the log
if not temp:
# retrieve the log length
gl.glGetProgramiv(self.handle, gl.GL_INFO_LOG_LENGTH, byref(temp))
# create a buffer for the log
buffer = create_string_buffer(temp.value)
# retrieve the log text
gl.glGetProgramInfoLog(self.handle, temp, None, buffer)
# print the log to the console
raise GLSLError(buffer.value)
# Query maximum uniform name length
AUL = gl.GLint()
gl.glGetProgramiv(self.handle, gl.GL_ACTIVE_UNIFORM_MAX_LENGTH,
byref(AUL))
self._ACTIVE_UNIFORM_MAX_LENGTH = AUL.value
self._update_uniform_types()
def check_program(program):
"""check_program(program)
Raises a RuntimeError if the program hasn't linked correctly."""
# See if the program linkd correctly
link_ok = gl.GLint(0)
gl.glGetProgramiv(program, gl.GL_LINK_STATUS,
c.pointer(link_ok))
# If linking fails, get the error description from OpenGL and raise
# it
if not link_ok:
log_len = gl.GLint(0)
gl.glGetProgramiv(program, gl.GL_INFO_LOG_LENGTH,
c.pointer(log_len))
log_buf = c.create_string_buffer(log_len.value)
gl.glGetProgramInfoLog(program, log_len, None, log_buf)
raise RuntimeError(
"Program %d could not link: %s" % (
program, log_buf.value))
def compileShader( source, shaderType ):
"""Compile shader source of given type (only needed by compileProgram)"""
shader = gl.glCreateShaderObjectARB(shaderType)
#were we given a source string or a ShaderCode object?
if hasattr(source, 'src'): source = source.src
prog = c_char_p(source)
length = c_int(-1)
gl.glShaderSourceARB(shader,
1,
cast(byref(prog), POINTER(POINTER(c_char))),
byref(length))
gl.glCompileShaderARB(shader)
#check for errors
status = c_int()
gl.glGetShaderiv(shader, gl.GL_COMPILE_STATUS, byref(status))
if not status.value:
# retrieve the log length
gl.glGetShaderiv(shader, gl.GL_INFO_LOG_LENGTH, byref(status))
# create a buffer for the log
buffer = create_string_buffer(status.value)#from ctypes
# retrieve the log text
gl.glGetProgramInfoLog(shader, status, None, buffer)
# print the log to the console
print buffer.value
gl.glDeleteShader(shader)
raise ValueError, 'Shader compilation failed'
return shader
def compileShader(source, shaderType):
"""Compile shader source of given type (only needed by compileProgram)"""
shader = gl.glCreateShaderObjectARB(shaderType)
#were we given a source string or a ShaderCode object?
if hasattr(source, 'src'): source = source.src
prog = c_char_p(source)
length = c_int(-1)
gl.glShaderSourceARB(shader, 1,
cast(byref(prog), POINTER(POINTER(c_char))),
byref(length))
gl.glCompileShaderARB(shader)
#check for errors
status = c_int()
gl.glGetShaderiv(shader, gl.GL_COMPILE_STATUS, byref(status))
if not status.value:
# retrieve the log length
gl.glGetShaderiv(shader, gl.GL_INFO_LOG_LENGTH, byref(status))
# create a buffer for the log
buffer = create_string_buffer(status.value) #from ctypes
# retrieve the log text
gl.glGetProgramInfoLog(shader, status, None, buffer)
# print the log to the console
print buffer.value
gl.glDeleteShader(shader)
raise ValueError, 'Shader compilation failed'
return shader
def __init__(self, *shaders: Shader):
self.name = gl.glCreateProgram()
for shader in shaders:
gl.glAttachShader(self.name, shader.name)
gl.glLinkProgram(self.name)
success = gl.GLint(0)
gl.glGetProgramiv(self.name, gl.GL_LINK_STATUS, byref(success))
if not success:
log_length = gl.GLint(0)
gl.glGetProgramiv(self.name, gl.GL_INFO_LOG_LENGTH,
byref(log_length))
log_buffer = create_string_buffer(log_length.value)
gl.glGetProgramInfoLog(self.name, log_length.value, None,
log_buffer)
self.logger.error("Error linking program %s, error # %d",
self.name, success.value)
self.logger.error("---Message---")
for line in log_buffer.value.decode("ascii").splitlines():
self.logger.error("Program: " + line)
self.logger.error("------")
raise RuntimeError("Linking program failed.")
# free resources
for shader in shaders:
gl.glDeleteShader(shader.name)
def get_info_log(self):
length = self.get_info_log_length()
if length == 0:
return ''
buffer = create_string_buffer(length)
gl.glGetProgramInfoLog(self.id, length, None, buffer)
return buffer.value
def get_info_log(self):
length = self.get_info_log_length()
if length == 0:
return ''
buffer = create_string_buffer(length)
gl.glGetProgramInfoLog(self.id, length, None, buffer)
return buffer.value
def was_link_successful(self):
status = c_int(0)
glGetProgramiv(self.handle, GL_LINK_STATUS, byref(status))
if not status:
glGetProgramiv(self.handle, GL_INFO_LOG_LENGTH, byref(status))
buffer = create_string_buffer(status.value)
glGetProgramInfoLog(self.handle, status, None, buffer)
self.log.error(f"{buffer.value}")
return status
def link_program(program):
gl.glLinkProgram(program)
length = gl.GLint(0)
gl.glGetProgramiv(program, gl.GL_INFO_LOG_LENGTH, ctypes.byref(length))
log_buffer = ctypes.create_string_buffer(length.value)
gl.glGetProgramInfoLog(program, length, None, log_buffer)
for line in log_buffer.value[:length.value].decode('ascii').splitlines():
print('GLSL: ' + line)
def link_program(program):
''' link a glsl program and print error messages.'''
gl.glLinkProgram(program)
length = gl.GLint(0)
gl.glGetProgramiv(program, gl.GL_INFO_LOG_LENGTH, ctypes.byref(length))
log_buffer = ctypes.create_string_buffer(length.value)
gl.glGetProgramInfoLog(program, length, None, log_buffer)
for line in log_buffer.value[:length.value].decode('ascii').splitlines():
print('GLSL: ' + line)
def print_error(message):
nonlocal error
error = True
status = GLint()
glGetProgramiv(program, GL_INFO_LOG_LENGTH, byref(
status)) # Getting the number of char in info log to 'status'
output = create_string_buffer(status.value) # status.value)
glGetProgramInfoLog(program, status, None, output)
print(message, output.value.decode('utf-8'), file=sys.stderr)
def link(self):
"""link the program"""
gl.glLinkProgram(self.id)
# Check if linking was successful. If not, print the log.
link_status = c_int(0)
gl.glGetProgramiv(self.id, gl.GL_LINK_STATUS, byref(link_status))
if not link_status:
gl.glGetProgramiv(self.id, gl.GL_INFO_LOG_LENGTH, byref(link_status)) # retrieve the log length
buffer = create_string_buffer(link_status.value) # create a buffer for the log
gl.glGetProgramInfoLog(self.id, link_status, None, buffer) # retrieve the log text
print(buffer.value) # print the log to the console
def link(glo):
"""Link a shader program"""
gl.glLinkProgram(glo)
status = c_int()
gl.glGetProgramiv(glo, gl.GL_LINK_STATUS, status)
if not status.value:
length = c_int()
gl.glGetProgramiv(glo, gl.GL_INFO_LOG_LENGTH, length)
log = c_buffer(length.value)
gl.glGetProgramInfoLog(glo, len(log), None, log)
raise ShaderException("Program link error: {}".format(
log.value.decode()))
def link(self):
gl.glLinkProgram(self.__value)
err_status = ct.c_int()
gl.glGetProgramiv(self.__value, gl.GL_LINK_STATUS, ct.byref(err_status))
if err_status.value != gl.GL_TRUE:
log_length = ct.c_int()
gl.glGetProgramiv(self.__value, gl.GL_INFO_LOG_LENGTH, ct.byref(log_length))
log_buf = (ct.c_char * (log_length.value))()
log_buf_ptr = ct.cast(ct.pointer(log_buf), ct.c_char_p)
gl.glGetProgramInfoLog(self.__value, log_length.value, None, log_buf_ptr)
raise GLException("Program failed to link:\n%s" % log_buf.value)
def link(self):
if self._shaders_empty:
raise RuntimeError("No shaders attached to program")
gl.glLinkProgram(self.gl_id)
rc = gl.GLint(0)
gl.glGetProgramiv(self.gl_id, gl.GL_LINK_STATUS, ctypes.byref(rc))
if not rc:
gl.glGetProgramiv(self.gl_id, gl.GL_INFO_LOG_LENGTH,
ctypes.byref(rc))
buffer = ctypes.create_string_buffer(rc.value)
gl.glGetProgramInfoLog(self.gl_id, rc, None, buffer)
raise GLObjectException(buffer.value.decode())
else:
self._done_link = True
def link(self):
"""link the program"""
gl.glLinkProgram(self.id)
# Check if linking was successful. If not, print the log.
link_status = c_int(0)
gl.glGetProgramiv(self.id, gl.GL_LINK_STATUS, byref(link_status))
if not link_status:
gl.glGetProgramiv(self.id, gl.GL_INFO_LOG_LENGTH,
byref(link_status)) # retrieve the log length
buffer = create_string_buffer(
link_status.value) # create a buffer for the log
gl.glGetProgramInfoLog(self.id, link_status, None,
buffer) # retrieve the log text
print(buffer.value) # print the log to the console
def link(self):
gl.glLinkProgram(self.handle)
# Retrieve the link status
status = c_int(0)
gl.glGetProgramiv(self.handle, gl.GL_LINK_STATUS, byref(status))
# If linking failed, get log and abort.
if not status:
#Retrieve the log and pass it up with an exception.
gl.glGetProgramiv(self.handle, gl.GL_INFO_LOG_LENGTH,
byref(status))
log = create_string_buffer(status.value)
gl.glGetProgramInfoLog(self.handle, status, None, log)
raise Exception("Linking shaders failed {0}".format(log.value))
else:
self.linked = True
def link(self):
# link the program
glLinkProgram(self.handle)
temp = c_int(0)
# retrieve the link status
glGetProgramiv(self.handle, GL_LINK_STATUS, byref(temp))
# if linking failed, print the log
if not temp:
# retrieve the log length
glGetProgramiv(self.handle, GL_INFO_LOG_LENGTH, byref(temp))
# create a buffer for the log
buffer = create_string_buffer(temp.value)
# retrieve the log text
glGetProgramInfoLog(self.handle, temp, None, buffer)
# print the log to the console
self.log.error(f"{buffer.value}")
else:
# all is well, so we are linked
self.linked = True
def link(self):
"""Main steps to link the program:
1. glLinkProgram:
linke the shaders in the program to create an executable
2. glGetProgramiv:
retrieve the link status
3. glGetProgramInfoLog:
print the error log if link failed
"""
gl.glLinkProgram(self.program)
link_status = gl.GLint(0)
gl.glGetProgramiv(self.program, gl.GL_LINK_STATUS, ct.byref(link_status))
if not link_status:
info_length = gl.GLint(0)
gl.glGetProgramiv(self.program, gl.GL_INFO_LOG_LENGTH, ct.byref(info_length))
error_info = ct.create_string_buffer(info_length.value)
gl.glGetProgramInfoLog(self.program, info_length, None, error_info)
print(error_info.value)
def link(self):
"""link the program, making it the active shader.
.. note:: Shader.bind() is preferred here, because link() Requires the Shader to be compiled already.
"""
gl.glLinkProgram(self.id)
# Check if linking was successful. If not, print the log.
link_status = c_int(0)
gl.glGetProgramiv(self.id, gl.GL_LINK_STATUS, byref(link_status))
if not link_status:
gl.glGetProgramiv(self.id, gl.GL_INFO_LOG_LENGTH,
byref(link_status)) # retrieve the log length
buffer = create_string_buffer(
link_status.value) # create a buffer for the log
gl.glGetProgramInfoLog(self.id, link_status, None,
buffer) # retrieve the log text
print(buffer.value) # print the log to the console
self.is_linked = True
def link(self):
"""
Main steps to link the program:
1. glLinkProgram:
linke the shaders in the program to create an executable
2. glGetProgramiv:
retrieve the link status
3. glGetProgramInfoLog:
print the error log if link failed
"""
gl.glLinkProgram(self.program)
link_status = gl.GLint(0)
gl.glGetProgramiv(self.program, gl.GL_LINK_STATUS, ct.byref(link_status))
if not link_status:
info_length = gl.GLint(0)
gl.glGetProgramiv(self.program, gl.GL_INFO_LOG_LENGTH, ct.byref(info_length))
error_info = ct.create_string_buffer(info_length.value)
gl.glGetProgramInfoLog(self.program, info_length, None, error_info)
print(error_info.value)
def link_program(program_name):
'''
link a glsl program and print error messages.
'''
gl.glLinkProgram(program_name)
success = gl.GLint(0)
gl.glGetProgramiv(program_name, gl.GL_LINK_STATUS, ctypes.byref(success))
length = gl.GLint(0)
gl.glGetProgramiv(program_name, gl.GL_INFO_LOG_LENGTH,
ctypes.byref(length))
log_buffer = ctypes.create_string_buffer(length.value)
gl.glGetProgramInfoLog(program_name, length, None, log_buffer)
log_message = log_buffer.value[:length.value].decode('ascii').strip()
if log_message:
sys.stderr.write(log_message + '\n')
if not success:
raise ValueError('Linking of the shader program failed.')
def link(self):
# link the program
glLinkProgram(self.handle)
temp = c_int(0)
# retrieve the link status
glGetProgramiv(self.handle, GL_LINK_STATUS, byref(temp))
# if linking failed, print the log
if not temp:
# retrieve the log length
glGetProgramiv(self.handle, GL_INFO_LOG_LENGTH, byref(temp))
# create a buffer for the log
buffer = create_string_buffer(temp.value)
# retrieve the log text
glGetProgramInfoLog(self.handle, temp, None, buffer)
# print the log to the console
print(buffer.value)
else:
# all is well, so we are linked
self.linked = True
def __init__(self, shaders, attributes, uniforms):
vertex_shader = shaders[0]
fragment_shader = shaders[1]
vertex_handle = glCreateShader(GL_VERTEX_SHADER)
glShaderSource(
vertex_handle, 1,
cast(pointer(pointer(create_string_buffer(vertex_shader))),
POINTER(POINTER(GLchar))), None)
glCompileShader(vertex_handle)
fragment_handle = glCreateShader(GL_FRAGMENT_SHADER)
glShaderSource(
fragment_handle, 1,
cast(pointer(pointer(create_string_buffer(fragment_shader))),
POINTER(POINTER(GLchar))), None)
glCompileShader(fragment_handle)
# Create attributes.
attribute_mapping = []
for attribute in attributes:
attribute_mapping.append(create_string_buffer(attribute))
try:
# Create program.
program_handle = glCreateProgram()
glAttachShader(program_handle, vertex_handle)
glAttachShader(program_handle, fragment_handle)
for index, name in enumerate(attributes): # CHANGED
glBindAttribLocation(program_handle, index, name)
glLinkProgram(program_handle)
glValidateProgram(program_handle)
glUseProgram(program_handle)
except GLException:
# Print errors.
status = GLint()
glGetShaderiv(vertex_handle, GL_INFO_LOG_LENGTH, byref(status))
output = create_string_buffer(status.value)
glGetShaderInfoLog(vertex_handle, status, None, output)
print(output.value.decode('utf-8'))
status = GLint()
glGetShaderiv(fragment_handle, GL_INFO_LOG_LENGTH, byref(status))
output = create_string_buffer(status.value)
glGetShaderInfoLog(fragment_handle, status, None, output)
print(output.value.decode('utf-8'))
status = GLint()
glGetProgramiv(program_handle, GL_INFO_LOG_LENGTH, byref(
status)) # Getting the number of char in info log to 'status'
output = create_string_buffer(status.value) # status.value)
glGetProgramInfoLog(program_handle, status, None, output)
print(output.value.decode('utf-8'))
# # Get uniform location.
# uniform_mapping = {}
# for uniform in uniforms:
# name = create_string_buffer(uniform)
# location = glGetUniformLocation(program_handle, cast(pointer(name), POINTER(GLchar)))
# uniform_mapping[uniform] = location
active_shaders = GLint()
glGetProgramiv(program_handle, GL_ACTIVE_UNIFORMS, active_shaders)
buffer_size = GLsizei(255)
data_type = GLenum(0)
string_buffer = create_string_buffer(buffer_size.value)
name = c_char_p(addressof(string_buffer))
uniform_mapping = {}
for index in range(active_shaders.value):
glGetActiveUniform(program_handle, index, buffer_size, None, None,
byref(data_type), name)
if name.value in uniforms:
location = glGetUniformLocation(
program_handle, cast(pointer(name), POINTER(GLchar)))
uniform = Uniform(name.value, location, data_type.value)
uniform_mapping[name.value] = uniform
super().__init__(program_handle)
self.uniforms = uniform_mapping
self.attributes = attribute_mapping
def create(cls, vertex_source, fragment_source, attributes, uniforms):
number_of_string = 1
# Create vertex shader.
vertex_handle = glCreateShader(GL_VERTEX_SHADER)
glShaderSource(vertex_handle, number_of_string,
c_pointer_to_char_pointers(vertex_source), None)
glCompileShader(vertex_handle)
# Create fragment shader.
fragment_handle = glCreateShader(GL_FRAGMENT_SHADER)
glShaderSource(fragment_handle, number_of_string,
c_pointer_to_char_pointers(fragment_source), None)
glCompileShader(fragment_handle)
# Create attributes.
attribute_mapping = []
for attribute in attributes:
attribute_mapping.append(c_string(attribute))
try:
# Create program.
program_handle = glCreateProgram()
glAttachShader(program_handle, vertex_handle)
glAttachShader(program_handle, fragment_handle)
for index, name in enumerate(attribute_mapping):
glBindAttribLocation(program_handle, index, name)
glLinkProgram(program_handle)
glValidateProgram(program_handle)
glUseProgram(program_handle)
except GLException as error:
# Print vertex shader errors.
status = GLint()
glGetShaderiv(vertex_handle, GL_INFO_LOG_LENGTH, byref(status))
output = create_string_buffer(status.value)
glGetShaderInfoLog(vertex_handle, status, None, output)
print(output.value.decode('utf-8'))
# Print fragment shader errors.
status = GLint()
glGetShaderiv(fragment_handle, GL_INFO_LOG_LENGTH, byref(status))
output = create_string_buffer(status.value)
glGetShaderInfoLog(fragment_handle, status, None, output)
print(output.value.decode('utf-8'))
# Print program errors.
status = GLint()
glGetProgramiv(program_handle, GL_INFO_LOG_LENGTH, byref(
status)) # Getting the number of char in info log to 'status'
output = create_string_buffer(status.value) # status.value)
glGetProgramInfoLog(program_handle, status, None, output)
print(output.value.decode('utf-8'))
raise error
# Get uniform location.
uniform_mapping = {}
for uniform in uniforms:
name = c_string(uniform)
location = glGetUniformLocation(
program_handle, cast(pointer(name), POINTER(c_char)))
uniform_mapping[uniform] = location
return cls(program_handle, uniform_mapping)
def __init__(self, shaders, attributes, uniforms):
# Create vertex shader.
vertex_shader = shaders[0]
vertex_handle = glCreateShader(GL_VERTEX_SHADER)
glShaderSource(vertex_handle, 1, c_string_array(vertex_shader), None)
glCompileShader(vertex_handle)
# Create fragment shader.
fragment_shader = shaders[1]
fragment_handle = glCreateShader(GL_FRAGMENT_SHADER)
glShaderSource(fragment_handle, 1, c_string_array(fragment_shader),
None)
glCompileShader(fragment_handle)
try:
# Create program.
program_handle = glCreateProgram()
# Attach shaders
glAttachShader(program_handle, vertex_handle)
glAttachShader(program_handle, fragment_handle)
# Bind attributes.
for index, name in enumerate(attributes):
glBindAttribLocation(program_handle, index, c_string(name))
# Link, validate and use.
glLinkProgram(program_handle)
glValidateProgram(program_handle)
glUseProgram(program_handle)
except GLException:
# Print errors.
status = GLint()
glGetShaderiv(vertex_handle, GL_INFO_LOG_LENGTH, byref(status))
output = create_string_buffer(status.value)
glGetShaderInfoLog(vertex_handle, status, None, output)
print(output.value.decode('utf-8'))
status = GLint()
glGetShaderiv(fragment_handle, GL_INFO_LOG_LENGTH, byref(status))
output = create_string_buffer(status.value)
glGetShaderInfoLog(fragment_handle, status, None, output)
print(output.value.decode('utf-8'))
status = GLint()
glGetProgramiv(program_handle, GL_INFO_LOG_LENGTH, byref(
status)) # Getting the number of char in info log to 'status'
output = create_string_buffer(status.value) # status.value)
glGetProgramInfoLog(program_handle, status, None, output)
print(output.value.decode('utf-8'))
# Query uniform data.
active_uniforms = GLint()
glGetProgramiv(program_handle, GL_ACTIVE_UNIFORMS, active_uniforms)
buffer_size = GLsizei(255)
data_type = GLenum(0)
string_buffer = create_string_buffer(buffer_size.value)
name = c_char_p(addressof(string_buffer))
uniform_mapping = {}
for index in range(active_uniforms.value):
glGetActiveUniform(program_handle, index, buffer_size, None, None,
byref(data_type), name)
if name.value in uniforms:
location = glGetUniformLocation(
program_handle, cast(pointer(name), POINTER(GLchar)))
uniform = Uniform(name.value, location, data_type.value)
uniform_mapping[name.value] = uniform
self.id = GLuint(program_handle)
self.uniforms = uniform_mapping
self.attributes = attributes
