def link(self):
glLinkProgram(self.handle)
if self.was_link_successful():
self.linked = True
else:
self.log.warn("Could not link shader program")
def setup_program():
'''
Create the glsl program
'''
vertex_shader = b'''
attribute vec2 position;
attribute vec4 color;
varying vec4 var_color;
void main()
{
gl_Position = vec4(position, 0.0, 1.0);
var_color = color;
}
'''
fragment_shader = b'''
varying vec4 var_color;
void main()
{
gl_FragColor = var_color;
}
'''
program = gl.glCreateProgram()
gl.glAttachShader(program, shader(gl.GL_VERTEX_SHADER, vertex_shader))
gl.glAttachShader(program, shader(gl.GL_FRAGMENT_SHADER, fragment_shader))
gl.glLinkProgram(program)
gl.glUseProgram(program)
return program
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 _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 _create_device_objects(self):
# save state
last_texture = gl.GLint()
gl.glGetIntegerv(gl.GL_TEXTURE_BINDING_2D, byref(last_texture))
last_array_buffer = gl.GLint()
gl.glGetIntegerv(gl.GL_ARRAY_BUFFER_BINDING, byref(last_array_buffer))
last_vertex_array = gl.GLint()
gl.glGetIntegerv(gl.GL_VERTEX_ARRAY_BINDING, byref(last_vertex_array))
self._shader_handle = gl.glCreateProgram()
# note: no need to store shader parts handles after linking
vertex_shader = gl.glCreateShader(gl.GL_VERTEX_SHADER)
fragment_shader = gl.glCreateShader(gl.GL_FRAGMENT_SHADER)
gl.glShaderSource(vertex_shader, 1, make_string_buffer(self.VERTEX_SHADER_SRC), None)
gl.glShaderSource(fragment_shader, 1, make_string_buffer(self.FRAGMENT_SHADER_SRC), None)
gl.glCompileShader(vertex_shader)
gl.glCompileShader(fragment_shader)
gl.glAttachShader(self._shader_handle, vertex_shader)
gl.glAttachShader(self._shader_handle, fragment_shader)
gl.glLinkProgram(self._shader_handle)
# note: after linking shaders can be removed
gl.glDeleteShader(vertex_shader)
gl.glDeleteShader(fragment_shader)
self._attrib_location_tex = gl.glGetUniformLocation(self._shader_handle, create_string_buffer(b"Texture"))
self._attrib_proj_mtx = gl.glGetUniformLocation(self._shader_handle, create_string_buffer(b"ProjMtx"))
self._attrib_location_position = gl.glGetAttribLocation(self._shader_handle, create_string_buffer(b"Position"))
self._attrib_location_uv = gl.glGetAttribLocation(self._shader_handle, create_string_buffer(b"UV"))
self._attrib_location_color = gl.glGetAttribLocation(self._shader_handle, create_string_buffer(b"Color"))
self._vbo_handle = gl.GLuint()
gl.glGenBuffers(1, byref(self._vbo_handle))
self._elements_handle = gl.GLuint()
gl.glGenBuffers(1, byref(self._elements_handle))
self._vao_handle = gl.GLuint()
gl.glGenVertexArrays(1, byref(self._vao_handle))
gl.glBindVertexArray(self._vao_handle)
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, self._vbo_handle)
gl.glEnableVertexAttribArray(self._attrib_location_position)
gl.glEnableVertexAttribArray(self._attrib_location_uv)
gl.glEnableVertexAttribArray(self._attrib_location_color)
gl.glVertexAttribPointer(self._attrib_location_position, 2, gl.GL_FLOAT, gl.GL_FALSE, imgui.VERTEX_SIZE, c_void_p(imgui.VERTEX_BUFFER_POS_OFFSET))
gl.glVertexAttribPointer(self._attrib_location_uv, 2, gl.GL_FLOAT, gl.GL_FALSE, imgui.VERTEX_SIZE, c_void_p(imgui.VERTEX_BUFFER_UV_OFFSET))
gl.glVertexAttribPointer(self._attrib_location_color, 4, gl.GL_UNSIGNED_BYTE, gl.GL_TRUE, imgui.VERTEX_SIZE, c_void_p(imgui.VERTEX_BUFFER_COL_OFFSET))
# restore state
gl.glBindTexture(gl.GL_TEXTURE_2D, cast((c_int*1)(last_texture), POINTER(c_uint)).contents)
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, cast((c_int*1)(last_array_buffer), POINTER(c_uint)).contents)
gl.glBindVertexArray(cast((c_int*1)(last_vertex_array), POINTER(c_uint)).contents)
def __init__(self, ec, fill_color, line_color, line_width, line_loop):
self._ec = ec
self._line_width = line_width
self._line_loop = line_loop # whether or not lines drawn are looped
# initialize program and shaders
from pyglet import gl
self._program = gl.glCreateProgram()
vertex = gl.glCreateShader(gl.GL_VERTEX_SHADER)
buf = create_string_buffer(tri_vert.encode('ASCII'))
ptr = cast(pointer(pointer(buf)), POINTER(POINTER(c_char)))
gl.glShaderSource(vertex, 1, ptr, None)
gl.glCompileShader(vertex)
_check_log(vertex, gl.glGetShaderInfoLog)
fragment = gl.glCreateShader(gl.GL_FRAGMENT_SHADER)
buf = create_string_buffer(tri_frag.encode('ASCII'))
ptr = cast(pointer(pointer(buf)), POINTER(POINTER(c_char)))
gl.glShaderSource(fragment, 1, ptr, None)
gl.glCompileShader(fragment)
_check_log(fragment, gl.glGetShaderInfoLog)
gl.glAttachShader(self._program, vertex)
gl.glAttachShader(self._program, fragment)
gl.glLinkProgram(self._program)
_check_log(self._program, gl.glGetProgramInfoLog)
gl.glDetachShader(self._program, vertex)
gl.glDetachShader(self._program, fragment)
gl.glUseProgram(self._program)
# Prepare buffers and bind attributes
loc = gl.glGetUniformLocation(self._program, b'u_view')
view = ec.window_size_pix
view = np.diag([2. / view[0], 2. / view[1], 1., 1.])
view[-1, :2] = -1
view = view.astype(np.float32).ravel()
gl.glUniformMatrix4fv(loc, 1, False, (c_float * 16)(*view))
self._counts = dict()
self._colors = dict()
self._buffers = dict()
self._points = dict()
self._tris = dict()
for kind in ('line', 'fill'):
self._counts[kind] = 0
self._colors[kind] = (0., 0., 0., 0.)
self._buffers[kind] = dict(array=gl.GLuint())
gl.glGenBuffers(1, pointer(self._buffers[kind]['array']))
self._buffers['fill']['index'] = gl.GLuint()
gl.glGenBuffers(1, pointer(self._buffers['fill']['index']))
gl.glUseProgram(0)
self.set_fill_color(fill_color)
self.set_line_color(line_color)
def __init__(self, ec, fill_color, line_color, line_width, line_loop):
self._ec = ec
self._line_width = line_width
self._line_loop = line_loop # whether or not lines drawn are looped
# initialize program and shaders
from pyglet import gl
self._program = gl.glCreateProgram()
vertex = gl.glCreateShader(gl.GL_VERTEX_SHADER)
buf = create_string_buffer(tri_vert.encode('ASCII'))
ptr = cast(pointer(pointer(buf)), POINTER(POINTER(c_char)))
gl.glShaderSource(vertex, 1, ptr, None)
gl.glCompileShader(vertex)
_check_log(vertex, gl.glGetShaderInfoLog)
fragment = gl.glCreateShader(gl.GL_FRAGMENT_SHADER)
buf = create_string_buffer(tri_frag.encode('ASCII'))
ptr = cast(pointer(pointer(buf)), POINTER(POINTER(c_char)))
gl.glShaderSource(fragment, 1, ptr, None)
gl.glCompileShader(fragment)
_check_log(fragment, gl.glGetShaderInfoLog)
gl.glAttachShader(self._program, vertex)
gl.glAttachShader(self._program, fragment)
gl.glLinkProgram(self._program)
_check_log(self._program, gl.glGetProgramInfoLog)
gl.glDetachShader(self._program, vertex)
gl.glDetachShader(self._program, fragment)
gl.glUseProgram(self._program)
# Prepare buffers and bind attributes
loc = gl.glGetUniformLocation(self._program, b'u_view')
view = ec.window_size_pix
view = np.diag([2. / view[0], 2. / view[1], 1., 1.])
view[-1, :2] = -1
view = view.astype(np.float32).ravel()
gl.glUniformMatrix4fv(loc, 1, False, (c_float * 16)(*view))
self._counts = dict()
self._colors = dict()
self._buffers = dict()
self._points = dict()
self._tris = dict()
for kind in ('line', 'fill'):
self._counts[kind] = 0
self._colors[kind] = (0., 0., 0., 0.)
self._buffers[kind] = dict(array=gl.GLuint())
gl.glGenBuffers(1, pointer(self._buffers[kind]['array']))
self._buffers['fill']['index'] = gl.GLuint()
gl.glGenBuffers(1, pointer(self._buffers['fill']['index']))
gl.glUseProgram(0)
self.set_fill_color(fill_color)
self.set_line_color(line_color)
def __init__(self, vertex_shader, fragment_shader):
self.handle = gl.glCreateProgram()
logging.debug('GLProgram.__init__: self.handle = %r', self.handle)
gl.glAttachShader(self.handle,
shader(gl.GL_VERTEX_SHADER, vertex_shader))
gl.glAttachShader(self.handle,
shader(gl.GL_FRAGMENT_SHADER, fragment_shader))
gl.glLinkProgram(self.handle)
#call use() early so some programm errors are caught early
self.use()
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 link(self):
"""
Link the shader program. Return True if the linking was successful,
False otherwise.
Also reload the uniform cache is successful
"""
glLinkProgram(self.pid)
if self.link_status == GL_TRUE:
self.uniforms.reload()
self.attributes.reload()
return True
def __init__(self,
vertex_shader: Shader,
fragment_shader: Shader,
attributes=(),
uniforms=None):
"""
The process of creating a shader can be divided into 6 steps:
1. Create an ID.
2. Attach shaders.
3. Bind attributes.
4. Link program.
5. Validate program.
6. Bind uniforms.
Args:
vertex_shader:
fragment_shader:
attributes:
uniforms: A dictionary with the names of the uniform as the key, and the uniform (glsl value) as value.
"""
if uniforms is None:
uniforms = {}
handle = -1
attribute_location = {}
uniform_location = {}
try:
handle = glCreateProgram()
glAttachShader(handle, vertex_shader)
glAttachShader(handle, fragment_shader)
for index, name in enumerate(attributes):
glBindAttribLocation(handle, index, c_string(name))
attribute_location[name] = index
glLinkProgram(handle)
glValidateProgram(handle)
for uniform in uniforms:
uniform_location[uniform] = glGetUniformLocation(
handle, c_string(uniform))
except GLException:
debug_program(handle)
super(Program, self).__init__(handle)
self.vertex_shader = vertex_shader
self.fragment_shader = fragment_shader
self.attribute_location = attribute_location
self.uniform_location = uniform_location
self.uniforms = uniforms
if CHECK_ERROR:
debug_program(self)
def __init__(self, vertex_source, fragment_source):
self.program = gl.glCreateProgram()
self.vertex_shader = self.create_shader(vertex_source,
gl.GL_VERTEX_SHADER)
self.fragment_shader = self.create_shader(fragment_source,
gl.GL_FRAGMENT_SHADER)
gl.glAttachShader(self.program, self.vertex_shader)
gl.glAttachShader(self.program, self.fragment_shader)
gl.glLinkProgram(self.program)
message = self.get_program_log(self.program)
if message:
raise ShaderException(message)
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):
"""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 __init__(self, vertex_source, fragment_source):
self.program = gl.glCreateProgram()
self.vertex_shader = self.create_shader(vertex_source,
gl.GL_VERTEX_SHADER)
self.fragment_shader = self.create_shader(fragment_source,
gl.GL_FRAGMENT_SHADER)
gl.glAttachShader(self.program, self.vertex_shader)
gl.glAttachShader(self.program, self.fragment_shader)
gl.glLinkProgram(self.program)
message = self.get_program_log(self.program)
if message:
raise ShaderException(message)
def compile(self):
self.id = gl.glCreateProgram()
for shader in self.shaders:
shader.compile()
gl.glAttachShader(self.id, shader.id)
gl.glLinkProgram(self.id)
message = self._get_message()
if not self.get_link_status():
raise LinkError(message)
return message
def compile(self):
self.id = gl.glCreateProgram()
for shader in self.shaders:
shader.compile()
gl.glAttachShader(self.id, shader.id)
gl.glLinkProgram(self.id)
message = self._get_message()
if not self.get_link_status():
raise LinkError(message)
return message
def link(self):
"""
Link the shader program. Return True if the linking was successful,
False otherwise.
Also reload the uniform cache is successful
"""
glLinkProgram(self.pid)
self.detach(*self.shaders(), delete=False
) # always! detach shaders after link successful or not
if self.link_status == GL_TRUE:
self.uniforms.reload()
self.attributes.reload()
return True
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):
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):
"""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 __init__(self, vertex, fragment, version=None):
self._pid = gl.glCreateProgram()
self._vertex_source = preprocess_shader(vertex, 'vert', version)
self._fragment_source = preprocess_shader(fragment, 'frag', version)
self.compile_vertex_shader()
self.compile_fragment_shader()
gl.glAttachShader(self._pid, self._vid)
gl.glAttachShader(self._pid, self._fid)
gl.glLinkProgram(self._pid)
self._uniforms = {}
self._attributes = {}
def __init__(self, source):
self.source = source
self.shader_no = gl.glCreateShader(self.shader_type)
if not self.shader_no:
raise Exception("could not create shader")
prog = (c_char_p * 1)(source + chr(0))
length = (c_int * 1)(0)
gl.glShaderSource(self.shader_no, 1,
cast(prog, POINTER(POINTER(c_char))),
cast(0, POINTER(c_int)))
gl.glCompileShader(self.shader_no)
self.program_no = gl.glCreateProgram()
if not self.program_no:
raise Exception("could not create program")
gl.glAttachShader(self.program_no, self.shader_no)
gl.glLinkProgram(self.program_no)
def __init__(self, source):
self.source = source
self.shader_no = gl.glCreateShader(self.shader_type)
if not self.shader_no:
raise Exception("could not create shader")
prog = (c_char_p * 1)(source + chr(0))
length = (c_int * 1)(0)
gl.glShaderSource(self.shader_no, 1,
cast(prog, POINTER(POINTER(c_char))),
cast(0, POINTER(c_int)))
gl.glCompileShader(self.shader_no)
self.program_no = gl.glCreateProgram()
if not self.program_no:
raise Exception("could not create program")
gl.glAttachShader(self.program_no, self.shader_no)
gl.glLinkProgram(self.program_no)
def __init__(self, *shaders: Shader):
self.prog_id = prog_id = gl.glCreateProgram()
shaders_id = []
for shader_code, shader_type in shaders:
shader = compile_shader(shader_code, shader_type)
gl.glAttachShader(self.prog_id, shader)
shaders_id.append(shader)
gl.glLinkProgram(self.prog_id)
for shader in shaders_id:
# Flag shaders for deletion. Will only be deleted once detached from program.
gl.glDeleteShader(shader)
self._uniforms: Dict[str, Uniform] = {}
self._introspect_uniforms()
weakref.finalize(self, Program._delete, shaders_id, prog_id)
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_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):
"""
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
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, vert_path, frag_path): self.program = gl.glCreateProgram() # create vertex shader self.vert_shader = gl.glCreateShader(gl.GL_VERTEX_SHADER) create_shader(self.vert_shader, vert_path) gl.glAttachShader(self.program, self.vert_shader) # create fragment shader self.frag_shader = gl.glCreateShader(gl.GL_FRAGMENT_SHADER) create_shader(self.frag_shader, frag_path) gl.glAttachShader(self.program, self.frag_shader) # link program and clean up gl.glLinkProgram(self.program) gl.glDeleteShader(self.vert_shader) gl.glDeleteShader(self.frag_shader)
def build_program(name):
"""build_program(name)
Loads and compiles the shaders and afterwards link them into a
program."""
# Compile the shaders
vs = load_shader(name, 'v')
fs = load_shader(name, 'f')
# Create and link the program
program = gl.glCreateProgram()
gl.glAttachShader(program, vs)
gl.glAttachShader(program, fs)
gl.glLinkProgram(program)
# If everything is ok -- return the program
check_program(program)
return program
def __init__(self, *shaders):
pid = False
try:
pid = glCreateProgramObjectARB()
except GLException:
raise ShaderError("Can't create program object!")
for s in shaders:
glAttachObjectARB(pid, s.sid)
glLinkProgram(pid)
v = GLint(0)
glGetProgramiv(pid, GL_LINK_STATUS, byref(v))
if not v:
log = _get_infolog(pid)
e = ShaderError("Error linking program!")
e.infolog = log
raise e
self.pid = pid
self.uniform = _UniformAccesser(self)
self.attrib = _AttributeAccesser(self)
def _compile_shader(vs_src, fs_src):
vs = gl.glCreateShader(gl.GL_VERTEX_SHADER)
vs_src_buf = c.create_string_buffer(vs_src)
c_vs_src = c.cast(c.pointer(vs_src_buf), c.POINTER(c.c_char))
i = c.c_int32(len(vs_src))
gl.glShaderSource(vs, 1, c_vs_src, c.byref(i))
gl.glCompileShader(vs)
fs = gl.glCreateShader(gl.GL_FRAGMENT_SHADER)
fs_src_buf = c.create_string_buffer(fs_src)
c_fs_src = c.cast(c.pointer(fs_src_buf), c.POINTER(c.c_char))
i = c.c_int32(len(fs_src))
gl.glShaderSource(fs, 1, c_fs_src, c.byref(i))
gl.glCompileShader(fs)
program = gl.glCreateProgram()
gl.glAttachShader(program, vs)
gl.glAttachShader(program, fs)
gl.glLinkProgram(program)
gl.glDeleteShader(vs)
gl.glDeleteShader(fs)
return program
def __init__(self, *shaders):
pid = False
try:
pid = glCreateProgramObjectARB()
except GLException:
raise ShaderError("Can't create program object!")
for s in shaders:
glAttachObjectARB(pid, s.sid)
glLinkProgram(pid)
v = GLint(0)
glGetProgramiv(pid, GL_LINK_STATUS, byref(v))
if not v:
log = _get_infolog(pid)
e = ShaderError("Error linking program!")
e.infolog = log
raise e
self.pid = pid
self.uniform = _UniformAccesser(self)
self.attrib = _AttributeAccesser(self)
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, vertex_shader, fragment_shader):
self.handle = gl.glCreateProgram()
gl.glAttachShader(self.handle, shader(gl.GL_VERTEX_SHADER, vertex_shader))
gl.glAttachShader(self.handle, shader(gl.GL_FRAGMENT_SHADER, fragment_shader))
gl.glLinkProgram(self.handle)
self.use() # early error
gl.glGetShaderInfoLog(shader, len(log), None, log)
raise Exception('Error compiling shader: ' + log.value.decode('utf8'))
return shader
#===== main =====#
# window
window = pyglet.window.Window(width=640, height=480, vsync=True)
# shader
program = gl.glCreateProgram()
gl.glAttachShader(program, compile_shader(gl.GL_VERTEX_SHADER,
vert_shader_src))
gl.glAttachShader(program,
compile_shader(gl.GL_FRAGMENT_SHADER, frag_shader_src))
gl.glLinkProgram(program)
# uniforms
u_origin = gl.glGetUniformLocation(program, b'uOrigin')
u_zoom = gl.glGetUniformLocation(program, b'uZoom')
origin = [0, 0]
zoom = [1, 1]
# attributes
a_position = gl.glGetAttribLocation(program, b'aPosition')
a_color = gl.glGetAttribLocation(program, b'aColor')
gl.glEnableVertexAttribArray(a_position)
gl.glEnableVertexAttribArray(a_color)
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
def program(*shaders):
p = gl.glCreateProgram()
for s in shaders:
gl.glAttachShader(p, s)
gl.glLinkProgram(p)
return check_shader_or_program_status(p)
def link(self):
gl.glLinkProgram(self.program_no)
gl.glGetProgramiv(self.program_no, gl.GL_LINK_STATUS, self.link_status)
if not self.link_status:
raise gl.GLSLException(_infolog(self.program_no, log_type="program"))