def _compile(self):
if self.shader:
return
if self.compiling:
return
self.compiling = True
self.shader = gl.glCreateShaderObjectARB(self.shaderType())
if self.shader == 0:
raise GLSLException('faled to create shader object')
prog = c_char_p(self.prog)
length = c_int(-1)
gl.glShaderSourceARB(self.shader, 1,
cast(byref(prog), POINTER(POINTER(c_char))),
byref(length))
gl.glCompileShaderARB(self.shader)
self.compiling = False
compile_status = c_int(0)
gl.glGetObjectParameterivARB(self.shader,
gl.GL_OBJECT_COMPILE_STATUS_ARB,
byref(compile_status))
if not compile_status.value:
err = glsl_log(self.shader)
gl.glDeleteObjectARB(self.shader)
self.shader = 0
raise GLSLException('failed to compile shader', err)
def link(self):
if self.vertex_shader is not None:
self.vertex_shader.compileFlat()
if self.fragment_shader is not None:
self.fragment_shader.compileFlat()
self.program = gl.glCreateProgramObjectARB()
if self.program == 0:
raise GLSLException('failed to create program object')
if self.vertex_shader is not None:
self.vertex_shader.attachFlat(self.program)
if self.fragment_shader is not None:
self.fragment_shader.attachFlat(self.program)
gl.glLinkProgramARB(self.program)
link_status = c_int(0)
gl.glGetObjectParameterivARB(self.program,
gl.GL_OBJECT_LINK_STATUS_ARB,
byref(link_status))
if link_status.value == 0:
err = glsl_log(self.program)
gl.glDeleteObjectARB(self.program)
self.program = 0
raise GLSLException('failed to link shader', err)
self.__class__._uloc_ = {}
self.__class__._vloc_ = {}
return self.program
def compileFlat(self):
if self.isCompiled():
return
self.shader = gl.glCreateShaderObjectARB(self.shaderType())
if self.shader == 0:
raise GLSLException('faled to create shader object')
all_source = [b'\n'.join(self._source())]
prog = (c_char_p * len(all_source))(*all_source)
length = (c_int * len(all_source))(-1)
gl.glShaderSourceARB(self.shader, len(all_source),
cast(prog, POINTER(POINTER(c_char))), length)
gl.glCompileShaderARB(self.shader)
compile_status = c_int(0)
gl.glGetObjectParameterivARB(self.shader,
gl.GL_OBJECT_COMPILE_STATUS_ARB,
byref(compile_status))
if not compile_status.value:
err = glsl_log(self.shader)
gl.glDeleteObjectARB(self.shader)
self.shader = 0
raise GLSLException('failed to compile shader', err)
def _compile(self):
if self.shader:
return
if self.compiling:
return
self.compiling = True
self.shader = gl.glCreateShaderObjectARB(self.shaderType())
if self.shader == 0:
raise GLSLException('faled to create shader object')
prog = c_char_p(self.prog)
length = c_int(-1)
gl.glShaderSourceARB(self.shader,
1,
cast(byref(prog), POINTER(POINTER(c_char))),
byref(length))
gl.glCompileShaderARB(self.shader)
self.compiling = False
compile_status = c_int(0)
gl.glGetObjectParameterivARB(self.shader, gl.GL_OBJECT_COMPILE_STATUS_ARB, byref(compile_status))
if not compile_status.value:
err = glsl_log(self.shader)
gl.glDeleteObjectARB(self.shader)
self.shader = 0
raise GLSLException('failed to compile shader', err)
def link(self):
if self.vertex_shader is not None:
self.vertex_shader.compileFlat()
if self.fragment_shader is not None:
self.fragment_shader.compileFlat()
self.program = gl.glCreateProgramObjectARB()
if self.program == 0:
raise GLSLException('failed to create program object')
if self.vertex_shader is not None:
self.vertex_shader.attachFlat(self.program)
if self.fragment_shader is not None:
self.fragment_shader.attachFlat(self.program)
gl.glLinkProgramARB(self.program)
link_status = c_int(0)
gl.glGetObjectParameterivARB(self.program, gl.GL_OBJECT_LINK_STATUS_ARB, byref(link_status))
if link_status.value == 0:
err = glsl_log(self.program)
gl.glDeleteObjectARB(self.program)
self.program = 0
raise GLSLException('failed to link shader', err)
self.__class__._uloc_ = {}
self.__class__._vloc_ = {}
return self.program
def compileFlat(self):
if self.isCompiled():
return
self.shader = gl.glCreateShaderObjectARB(self.shaderType())
if self.shader == 0:
raise GLSLException('faled to create shader object')
all_source = [b'\n'.join(self._source())]
prog = (c_char_p * len(all_source))(*all_source)
length = (c_int * len(all_source))(-1)
gl.glShaderSourceARB(self.shader,
len(all_source),
cast(prog, POINTER(POINTER(c_char))),
length)
gl.glCompileShaderARB(self.shader)
compile_status = c_int(0)
gl.glGetObjectParameterivARB(self.shader, gl.GL_OBJECT_COMPILE_STATUS_ARB, byref(compile_status))
if not compile_status.value:
err = glsl_log(self.shader)
gl.glDeleteObjectARB(self.shader)
self.shader = 0
raise GLSLException('failed to compile shader', err)
def glsl_log(handle):
if handle == 0:
return ''
log_len = c_int(0)
gl.glGetObjectParameterivARB(handle, gl.GL_OBJECT_INFO_LOG_LENGTH_ARB,
byref(log_len))
if log_len.value == 0:
return ''
log = create_string_buffer(log_len.value) # does log_len include the NUL?
chars_written = c_int(0)
gl.glGetInfoLogARB(handle, log_len.value, byref(chars_written), log)
return log.value
def glsl_log(handle):
if handle == 0:
return ''
log_len = c_int(0)
gl.glGetObjectParameterivARB(handle, gl.GL_OBJECT_INFO_LOG_LENGTH_ARB,
byref(log_len))
if log_len.value == 0:
return ''
log = create_string_buffer(log_len.value) # does log_len include the NUL?
chars_written = c_int(0)
gl.glGetInfoLogARB(handle, log_len.value, byref(chars_written), log)
return log.value
