def _test_setting_stuff():
# Set stuff to touch functions
gl.glClear(gl.GL_COLOR_BUFFER_BIT)
#
gl.glBlendColor(1.0, 1.0, 1.0, 1.0)
gl.glBlendEquation(gl.GL_FUNC_ADD)
gl.glBlendEquationSeparate(gl.GL_FUNC_ADD, gl.GL_FUNC_ADD)
gl.glBlendFunc(gl.GL_ONE, gl.GL_ZERO)
gl.glBlendFuncSeparate(gl.GL_ONE, gl.GL_ZERO, gl.GL_ONE, gl.GL_ZERO)
#
gl.glClearColor(0.0, 0.0, 0.0, 1.0)
gl.glClearDepth(1)
gl.glClearStencil(0)
#
gl.glColorMask(True, True, True, True)
gl.glDepthMask(False)
gl.glStencilMask(255)
gl.glStencilMaskSeparate(gl.GL_FRONT, 128)
#
gl.glStencilFunc(gl.GL_ALWAYS, 0, 255)
gl.glStencilFuncSeparate(gl.GL_FRONT, gl.GL_ALWAYS, 0, 255)
gl.glStencilOp(gl.GL_KEEP, gl.GL_KEEP, gl.GL_KEEP)
gl.glStencilOpSeparate(gl.GL_FRONT, gl.GL_KEEP, gl.GL_KEEP, gl.GL_KEEP)
#
gl.glFrontFace(gl.GL_CW)
gl.glHint(gl.GL_GENERATE_MIPMAP_HINT, gl.GL_FASTEST)
gl.glLineWidth(2.0)
gl.glPolygonOffset(0.0, 0.0)
gl.glSampleCoverage(1.0, False)
# And getting stuff
try:
with use_log_level('error', print_msg=False):
r, p = gl.glGetShaderPrecisionFormat(gl.GL_FRAGMENT_SHADER,
gl.GL_HIGH_FLOAT)
gl.check_error() # Sometimes the func is there but OpenGL errs
except Exception:
pass # accept if the function is not there ...
# We should catch RuntimeError and GL.error.NullFunctionError,
# but PyOpenGL may not be available.
# On Travis this function was not there on one machine according
# to PyOpenGL, but our desktop backend worked fine ...
#
v = gl.glGetParameter(gl.GL_VERSION)
assert_true(isinstance(v, string_types))
assert_true(len(v) > 0)
gl.check_error()
def _test_setting_stuff():
# Set stuff to touch functions
gl.glClear(gl.GL_COLOR_BUFFER_BIT)
#
gl.glBlendColor(1.0, 1.0, 1.0, 1.0)
gl.glBlendEquation(gl.GL_FUNC_ADD)
gl.glBlendEquationSeparate(gl.GL_FUNC_ADD, gl.GL_FUNC_ADD)
gl.glBlendFunc(gl.GL_ONE, gl.GL_ZERO)
gl.glBlendFuncSeparate(gl.GL_ONE, gl.GL_ZERO, gl.GL_ONE, gl.GL_ZERO)
#
gl.glClearColor(0.0, 0.0, 0.0, 1.0)
gl.glClearDepth(1)
gl.glClearStencil(0)
#
gl.glColorMask(True, True, True, True)
gl.glDepthMask(False)
gl.glStencilMask(255)
gl.glStencilMaskSeparate(gl.GL_FRONT, 128)
#
gl.glStencilFunc(gl.GL_ALWAYS, 0, 255)
gl.glStencilFuncSeparate(gl.GL_FRONT, gl.GL_ALWAYS, 0, 255)
gl.glStencilOp(gl.GL_KEEP, gl.GL_KEEP, gl.GL_KEEP)
gl.glStencilOpSeparate(gl.GL_FRONT, gl.GL_KEEP, gl.GL_KEEP, gl.GL_KEEP)
#
gl.glFrontFace(gl.GL_CW)
gl.glHint(gl.GL_GENERATE_MIPMAP_HINT, gl.GL_FASTEST)
gl.glLineWidth(2.0)
gl.glPolygonOffset(0.0, 0.0)
gl.glSampleCoverage(1.0, False)
# And getting stuff
try:
with use_log_level('error', print_msg=False):
r, p = gl.glGetShaderPrecisionFormat(gl.GL_FRAGMENT_SHADER,
gl.GL_HIGH_FLOAT)
gl.check_error() # Sometimes the func is there but OpenGL errs
except Exception:
pass # accept if the function is not there ...
# We should catch RuntimeError and GL.error.NullFunctionError,
# but PyOpenGL may not be available.
# On Travis this function was not there on one machine according
# to PyOpenGL, but our desktop backend worked fine ...
#
v = gl.glGetParameter(gl.GL_VERSION)
assert_true(isinstance(v, string_types))
assert_true(len(v) > 0)
gl.check_error()
def on_draw(self, event):
""" canvas update callback """
# Clear depth and color buffers
gloo.clear(color=C0)
# Filled cube
gloo.set_state(depth_test=True, blend=True, depth_mask=False)
#gloo.set_depth_mask(False)
#gl.glEnable(gl.GL_DEPTH_TEST)
#gl.glDepthMask(gl.GL_FALSE)
#gl.glEnable(gl.GL_BLEND)
#
self.quads['u_pass'] = 0.0
self.framebuffer.color_buffer = self.accum
self.framebuffer.activate()
gloo.clear(color=(0, 0, 0, 0))
#gloo.set_blend_func('one', 'one')
#gl.glBlendFunc(gl.GL_ONE, gl.GL_ONE)
gl.glBlendFuncSeparate(gl.GL_ONE, gl.GL_ONE,
gl.GL_ONE, gl.GL_ONE)
self.quads.draw('triangles', self.indices)
self.framebuffer.deactivate()
#
self.quads['u_pass'] = 1.0
self.framebuffer.color_buffer = self.reveal
self.framebuffer.activate()
gloo.clear(color=(1, 1, 1, 1))
#gloo.set_blend_func('zero', 'one_minus_src_color')
#gl.glBlendFunc(gl.GL_ZERO, gl.GL_ONE_MINUS_SRC_COLOR)
gl.glBlendFuncSeparate(gl.GL_ZERO, gl.GL_ONE_MINUS_SRC_COLOR,
gl.GL_ZERO, gl.GL_ONE_MINUS_SRC_COLOR)
self.quads.draw('triangles', self.indices)
self.framebuffer.deactivate()
# Filled cube
#gloo.set_blend_func('src_alpha', 'one_minus_src_alpha')
gl.glBlendFuncSeparate(gl.GL_SRC_ALPHA, gl.GL_ONE_MINUS_SRC_ALPHA,
gl.GL_SRC_ALPHA, gl.GL_ONE_MINUS_SRC_ALPHA)
# gloo.set_state('translucent', blend=True, depth_test=False)
self.post.draw('triangle_strip', self.indices)
def on_draw(self, event):
""" canvas update callback """
# Clear depth and color buffers
gloo.clear(color=C0)
# Filled cube
gloo.set_state(depth_test=True, blend=True, depth_mask=False)
#gloo.set_depth_mask(False)
#gl.glEnable(gl.GL_DEPTH_TEST)
#gl.glDepthMask(gl.GL_FALSE)
#gl.glEnable(gl.GL_BLEND)
#
self.quads['u_pass'] = 0.0
self.framebuffer.color_buffer = self.accum
self.framebuffer.activate()
gloo.clear(color=(0, 0, 0, 0))
#gloo.set_blend_func('one', 'one')
#gl.glBlendFunc(gl.GL_ONE, gl.GL_ONE)
gl.glBlendFuncSeparate(gl.GL_ONE, gl.GL_ONE, gl.GL_ONE, gl.GL_ONE)
self.quads.draw('triangles', self.indices)
self.framebuffer.deactivate()
#
self.quads['u_pass'] = 1.0
self.framebuffer.color_buffer = self.reveal
self.framebuffer.activate()
gloo.clear(color=(1, 1, 1, 1))
#gloo.set_blend_func('zero', 'one_minus_src_color')
#gl.glBlendFunc(gl.GL_ZERO, gl.GL_ONE_MINUS_SRC_COLOR)
gl.glBlendFuncSeparate(gl.GL_ZERO, gl.GL_ONE_MINUS_SRC_COLOR,
gl.GL_ZERO, gl.GL_ONE_MINUS_SRC_COLOR)
self.quads.draw('triangles', self.indices)
self.framebuffer.deactivate()
# Filled cube
#gloo.set_blend_func('src_alpha', 'one_minus_src_alpha')
gl.glBlendFuncSeparate(gl.GL_SRC_ALPHA, gl.GL_ONE_MINUS_SRC_ALPHA,
gl.GL_SRC_ALPHA, gl.GL_ONE_MINUS_SRC_ALPHA)
# gloo.set_state('translucent', blend=True, depth_test=False)
self.post.draw('triangle_strip', self.indices)