def create(self):
if not (self.status & Resource.LOADED):
return
vs = glCreateShader(GL_VERTEX_SHADER)
glShaderSource(vs, self.vs_str)
glCompileShader(vs)
if glGetShaderiv(vs, GL_COMPILE_STATUS) != GL_TRUE:
raise RuntimeError(glGetShaderInfoLog(vs))
fs = glCreateShader(GL_FRAGMENT_SHADER)
glShaderSource(fs, self.fs_str)
glCompileShader(fs)
if glGetShaderiv(fs, GL_COMPILE_STATUS) != GL_TRUE:
raise RuntimeError(glGetShaderInfoLog(fs))
program = glCreateProgram()
glAttachShader(program, vs)
glAttachShader(program, fs)
glLinkProgram(program)
if glGetProgramiv(program, GL_LINK_STATUS) != GL_TRUE:
raise RuntimeError(glGetProgramInfoLog(program))
glValidateProgram(program)
validation = glGetProgramiv(program, GL_VALIDATE_STATUS)
if validation == GL_FALSE:
raise RuntimeError(glGetProgramInfoLog(program))
# todo: check for errrors before setting status
self.program = program
self.status |= Resource.CREATED
def make_shader(shadertype, source):
shader = glCreateShader(shadertype)
glShaderSource(shader, source)
glCompileShader(shader)
retval = ctypes.c_uint(GL_UNSIGNED_INT)
glGetShaderiv(shader, GL_COMPILE_STATUS, retval)
if not retval:
print >> sys.stderr, "Failed to compile shader."
print glGetShaderInfoLog(shader)
glDeleteShader(shader)
raise Exception("Failed to compile shader.")
return shader
def add_shader(self, source, shader_type):
""" Helper function for compiling a GLSL shader
Parameters
----------
source : str
String containing shader source code
shader_type : valid OpenGL shader type
Type of shader to compile
Returns
-------
value : int
Identifier for shader if compilation is successful
"""
try:
shader_id = glCreateShader(shader_type)
glShaderSource(shader_id, source)
glCompileShader(shader_id)
if glGetShaderiv(shader_id, GL_COMPILE_STATUS) != GL_TRUE:
info = glGetShaderInfoLog(shader_id)
raise RuntimeError('Shader compilation failed: %s' % (info))
return shader_id
except:
glDeleteShader(shader_id)
raise
def add_shader(self, source, shader_type):
""" Helper function for compiling a GLSL shader
Parameters
----------
source : str
String containing shader source code
shader_type : valid OpenGL shader type
Type of shader to compile
Returns
-------
value : int
Identifier for shader if compilation is successful
"""
try:
shader_id = glCreateShader(shader_type)
glShaderSource(shader_id, source)
glCompileShader(shader_id)
if glGetShaderiv(shader_id, GL_COMPILE_STATUS) != GL_TRUE:
info = glGetShaderInfoLog(shader_id)
raise RuntimeError('Shader compilation failed: %s' % (info))
return shader_id
except:
glDeleteShader(shader_id)
raise
def initialize_shader(shader_type, shader_source):
shader = glCreateShader(shader_type)
glShaderSource(shader, shader_source)
glCompileShader(shader)
result = glGetShaderiv(shader, GL_COMPILE_STATUS)
if result == 0:
raise RuntimeError(glGetShaderInfoLog(shader))
return shader
def createShader(self, source, shaderType):
shader = glCreateShader(shaderType)
glShaderSource(shader, source, None)
glCompileShader(shader)
self.status[shaderType] = glGetShaderiv(shader, GL_COMPILE_STATUS)
self.infoLog[shaderType] = glGetShaderInfoLog(shader)
return shader
def getShader(self, shader_source, shader_type):
try:
shader_id = glCreateShader(shader_type)
glShaderSource(shader_id, shader_source)
glCompileShader(shader_id)
if glGetShaderiv(shader_id, GL_COMPILE_STATUS) != GL_TRUE:
info = glGetShaderInfoLog(shader_id)
raise RuntimeError('Shader compilation failed:\n %s' % info)
return shader_id
except:
glDeleteShader(shader_id)
raise
def add_shader(self, source, shader_type):
try:
#print "TEST"
#print source
shader_id = glCreateShader(shader_type)
glShaderSource(shader_id, source)
glCompileShader(shader_id)
if glGetShaderiv(shader_id, GL_COMPILE_STATUS) != GL_TRUE:
info = glGetShaderInfoLog(shader_id)
raise RuntimeError('Shader compilation failed: %s' % (info))
return shader_id
except:
glDeleteShader(shader_id)
raise
def CompileShader(self, type, source):
id = glCreateShader(type)
glShaderSource(id, source)
glCompileShader(id)
result = glGetShaderiv(id, GL_COMPILE_STATUS)
if (result==GL_FALSE):
message = glGetShaderInfoLog(id).decode('utf-8')
shadertype = "Vertex" if type==GL_VERTEX_SHADER else "Fragment"
print(f"Failed to compile {shadertype} shader!")
print(message)
glDeleteShader(id)
return 0
return id
def compilar(self, shader, nombre):
"""Compila el shader e informa errores.
shader = shader a compilar
nombre = nombre del shader en el informe de errores"""
# Compilamos el shader
glCompileShader(shader)
# Obtenemos su estado
resultado = glGetShaderiv(shader,GL_COMPILE_STATUS)
# Si el estado es != 1, hubo errores durante la compilación
if resultado != 1:
print "Error al compilar {n}, registro:\n".format(n=nombre) + \
glGetShaderInfoLog(shader)
# Devolvemos el estado
return resultado
def _createShader(self, shadertype, source):
try:
shader = None
shader = glCreateShader(shadertype)
glShaderSource(shader, source)
glCompileShader(shader)
if glGetShaderiv(shader, GL_COMPILE_STATUS) != GL_TRUE:
info = glGetShaderInfoLog(shader)
raise Exception, "Unable to compile shader. Infolog:\n%s" % (info,)
return shader
except Exception:
# Cleanup on exception
if shader != None:
glDeleteShader(shader)
raise
def loadAndCompileShaderObject(self, shader_type, path):
if not os.path.exists(path):
raise RuntimeError('Shader source not found at: %s' % path)
source_file = open(path)
shader_source = source_file.read()
source_file.close()
shader_object = glCreateShader(shader_type)
glShaderSource(shader_object, shader_source)
glCompileShader(shader_object)
if glGetShaderiv(shader_object, GL_COMPILE_STATUS) != GL_TRUE:
info = glGetShaderInfoLog(shader_object)
raise RuntimeError('Shader compilation failed:\n %s' % info)
return shader_object
def attachShader(self,type,source):
shader = glCreateShader(type)
glShaderSource(shader,source)
glCompileShader(shader)
shader_log = glGetShaderInfoLog(shader)
if shader_log:
if type == GL_FRAGMENT_SHADER:
str_type = "GL_FRAGMENT_SHADER"
elif type == GL_VERTEX_SHADER:
str_type = "GL_VERTEX_SHADER"
elif type == GL_GEOMETRY_SHADER:
str_type = "GL_GEOMETRY_SHADER"
else:
str_type = "unkown shader type %s" % str(type)
raise RuntimeError("%s\n%s" % (str_type, shader_log))
glAttachShader(self.program_id, shader)
self._shaders.append(shader)
def load_shader(shader_type, source):
shader = glCreateShader(shader_type)
if shader == 0:
raise ShaderException()
glShaderSource(shader, source)
glCompileShader(shader)
if glGetShaderiv(shader, GL_COMPILE_STATUS, None) == GL_FALSE:
info_log = glGetShaderInfoLog(shader)
glDeleteShader(shader)
raise ShaderException(info_log)
return shader
def _compile(self):
logging.info('glShaderSource(%d, ...)', self._hnd)
glShaderSource(self._hnd, self._source)
logging.info('glCompileShader(%d)', self._hnd)
glCompileShader(self._hnd)
if not glGetShaderiv(self._hnd, GL_COMPILE_STATUS):
logging.error('glCompileShader failed')
compile_log = glGetShaderInfoLog(self._hnd).decode('utf-8')
glDeleteShader(self._hnd)
if self._path == '':
print_source(self._source)
pretty_print_log(compile_log, self._path)
raise RuntimeError('shader failed to compile', compile_log)
def _compile(self):
logging.info('glShaderSource(%d, ...)', self._hnd)
glShaderSource(self._hnd, self._source)
logging.info('glCompileShader(%d)', self._hnd)
glCompileShader(self._hnd)
if not glGetShaderiv(self._hnd, GL_COMPILE_STATUS):
logging.error('glCompileShader failed')
compile_log = glGetShaderInfoLog(self._hnd).decode('utf-8')
glDeleteShader(self._hnd)
if self._path == '':
print_source(self._source)
pretty_print_log(compile_log, self._path)
raise RuntimeError('shader failed to compile', compile_log)
def compileProgram(path, type):
#Leo el codigo fuente desde el archivo
sourceFile = open(path, "r")
source = sourceFile.read()
#Creo un shader vacio en memoria de video, del tipo indicado
#En la variable shader queda almacenado un indice que nos va a permitir identificar este shader de ahora en mas
shader = glCreateShader(type)
#Le adjunto el codigo fuente leido desde el archivo
glShaderSource(shader, source)
#Intento compilarlo
glCompileShader(shader)
#Con la funcion glGelShaderiv puedo obtener el estado del compilador de shaders
#En este caso le pido el stado de la ultima compilacion ejecutada
if glGetShaderiv(shader, GL_COMPILE_STATUS) != GL_TRUE:
#Si la compilacion falla, muestro el error y retorno 0 (shader nulo)
print(path + ': ' + glGetShaderInfoLog(shader))
#Me aseguro de liberar los recursos que reserve en memoria de vide, ya que no los voy a usar
glDeleteShader(shader)
return 0
else:
return shader