def _test_enabling_disabling():
# Enabling/disabling
gl.glEnable(gl.GL_DEPTH_TEST)
assert_equal(gl.glIsEnabled(gl.GL_DEPTH_TEST), True)
assert_equal(gl.glGetParameter(gl.GL_DEPTH_TEST), 1)
gl.glDisable(gl.GL_DEPTH_TEST)
assert_equal(gl.glIsEnabled(gl.GL_DEPTH_TEST), False)
assert_equal(gl.glGetParameter(gl.GL_DEPTH_TEST), 0)
#
gl.glEnable(gl.GL_BLEND)
assert_equal(gl.glIsEnabled(gl.GL_BLEND), True)
assert_equal(gl.glGetParameter(gl.GL_BLEND), 1)
gl.glDisable(gl.GL_BLEND)
assert_equal(gl.glIsEnabled(gl.GL_BLEND), False)
assert_equal(gl.glGetParameter(gl.GL_BLEND), 0)
gl.check_error()
def _test_enabling_disabling():
# Enabling/disabling
gl.glEnable(gl.GL_DEPTH_TEST)
assert_equal(gl.glIsEnabled(gl.GL_DEPTH_TEST), True)
assert_equal(gl.glGetParameter(gl.GL_DEPTH_TEST), 1)
gl.glDisable(gl.GL_DEPTH_TEST)
assert_equal(gl.glIsEnabled(gl.GL_DEPTH_TEST), False)
assert_equal(gl.glGetParameter(gl.GL_DEPTH_TEST), 0)
#
gl.glEnable(gl.GL_BLEND)
assert_equal(gl.glIsEnabled(gl.GL_BLEND), True)
assert_equal(gl.glGetParameter(gl.GL_BLEND), 1)
gl.glDisable(gl.GL_BLEND)
assert_equal(gl.glIsEnabled(gl.GL_BLEND), False)
assert_equal(gl.glGetParameter(gl.GL_BLEND), 0)
gl.check_error()
def render_with_gloo(draw_data):
"""draw ImGui's drawlists with vispy's gloo interface
Parameters
----------
draw_data: ImDrawData
"""
global device_objects
# adapted from imgui_impl_ios.cpp in imgui, to target the minimal GLES API
d = pymgui.ImDrawData(draw_data)
io = pymgui.get_io()
fb_scale = io.display_framebuffer_scale
fb_width, fb_height = io.display_size
if fb_width == 0 or fb_height == 0:
return
conf = gloo.get_gl_configuration()
# backup GL state
last_program = gl.glGetParameter(gl.GL_CURRENT_PROGRAM)
last_texture = gl.glGetParameter(gl.GL_TEXTURE_BINDING_2D)
last_array_buffer = gl.glGetParameter(gl.GL_ARRAY_BUFFER_BINDING)
last_element_array_buffer = gl.glGetParameter(gl.GL_ELEMENT_ARRAY_BUFFER_BINDING)
last_viewport = gl.glGetParameter(gl.GL_VIEWPORT)
last_enable_blend = gl.glIsEnabled(gl.GL_BLEND),
last_blend_equation = gl.glGetParameter(gl.GL_BLEND_EQUATION_RGB),
last_blend_func = dict(
last_blend_equation_alpha=gl.glGetParameter(gl.GL_BLEND_EQUATION_ALPHA),
)
last_gl_states = dict(
cull_face = gl.glIsEnabled(gl.GL_CULL_FACE),
depth_test = gl.glIsEnabled(gl.GL_DEPTH_TEST),
scissor_test = gl.glIsEnabled(gl.GL_SCISSOR_TEST))
gloo.set_state(blend=True)
gloo.set_blend_equation('func_add')
gloo.set_blend_func(salpha='src_alpha', dalpha='one_minus_src_alpha')
gloo.set_state(cull_face=False, depth_test=False, scissor_test=True)
gl.glActiveTexture(gl.GL_TEXTURE0)
# Setup viewport, orthographic projection matrix
gloo.set_viewport(0, 0, int(fb_width), int(fb_height))
p = device_objects['program'] # type: gloo.Program
ortho_projection = np.array([
[2./fb_width, 0, 0, 0],
[0., 2./-fb_height, 0, 0],
[0., 0., -1., 0],
[-1., 1., 0, 0]
])
vtype = [('a_position', np.float32, 2),
('a_uv', np.float32, 2),
# ('a_color', np.uint8, 4)]
('a_color', np.uint32, 1)]
# pos_dtype = [('a_position', np.float32, 2)]
# uv_dtype = [('a_uv', np.float32, 2)]
# color_dtype = [('a_color', np.uint8, 4)]
itype = np.uint16
display_scale = 1.0
p['u_mvp'] = ortho_projection
# print("draw {} cmd_list".format(len(d.cmd_lists)))
for cmd_list in d.cmd_lists:
vertex_count =C.ImDrawList_GetVertexBufferSize(cmd_list)
index_count = C.ImDrawList_GetIndexBufferSize(cmd_list)
vertex_buffer_ptr = C.ImDrawList_GetVertexPtr(cmd_list, 0)
index_buffer_ptr = C.ImDrawList_GetIndexPtr(cmd_list, 0)
def to_nparray(ptr, item_count, dtype):
byte_count = item_count * dtype.itemsize
as_bytes = ffi.buffer(ptr, byte_count)
return np.frombuffer(as_bytes, dtype=dtype)
ig_vertices = to_nparray(vertex_buffer_ptr, vertex_count, np.dtype(vtype))
ig_indices = to_nparray(index_buffer_ptr, index_count, np.dtype(itype))
# print("{} vertices to draw".format(len(ig_vertices)))
#
p['a_position'] = ig_vertices[:]
# p['a_uv'] = ig_vertices['a_uv']
# p['a_color'] = ig_vertices['a_color']
# device_objects['geometry'] = ig_vertices
#
# gl.glBufferData(gl.GL_ARRAY_BUFFER, ig_vertices, gl.GL_STREAM_DRAW)
# gl.glBufferData(gl.GL_ELEMENT_ARRAY_BUFFER, indices, gl.GL_STREAM_DRAW)
#
# index_buffer_offset = 0
# cmd_size = C.ImDrawList_GetCmdSize(cmd_list)
# for cmd_index in range(cmd_size):
# draw_cmd_ptr = C.ImDrawList_GetCmdPtr(cmd_list, cmd_index)
# draw_cmd = pymgui.ImDrawCmd(draw_cmd_ptr)
#
# if draw_cmd.texture_id:
# gl.glBindTexture(gl.GL_TEXTURE_2D, draw_cmd.texture_id)
# x1, y1, x2, y2 = draw_cmd.clip_rect
#
# gl.glScissor(
# x=int(x1 * display_scale),
# y=int(y1 * display_scale),
# width=int((x2 - x1) * display_scale),
# height=int((y2 - y1) * display_scale)
# )
#
# start, stop = index_buffer_offset, draw_cmd.elem_count
# # gl.glDrawElements(gl.GL_TRIANGLES, draw_cmd.elem_count, gl.GL_UNSIGNED_SHORT, indices[index_buffer_offset:])
# p.draw('triangles', gloo.IndexBuffer(ig_indices[start:stop]))
# index_buffer_offset += draw_cmd.elem_count
#
# # Restore modified state
gloo.set_state(**last_gl_states)
gloo.set_state(blend=last_enable_blend)
# gloo.set_blend_equation(last_blend_equation)
# # gl.glBindVertexArray(0)
# gl.glBindBuffer(gl.GL_ARRAY_BUFFER, 0)
gl.glUseProgram(last_program)
def render_with_gloo(draw_data):
"""draw ImGui's drawlists with vispy's gloo interface
Parameters
----------
draw_data: ImDrawData
"""
global device_objects
# adapted from imgui_impl_ios.cpp in imgui, to target the minimal GLES API
d = pymgui.ImDrawData(draw_data)
io = pymgui.get_io()
fb_scale = io.display_framebuffer_scale
fb_width, fb_height = io.display_size
if fb_width == 0 or fb_height == 0:
return
conf = gloo.get_gl_configuration()
# backup GL state
last_program = gl.glGetParameter(gl.GL_CURRENT_PROGRAM)
last_texture = gl.glGetParameter(gl.GL_TEXTURE_BINDING_2D)
last_array_buffer = gl.glGetParameter(gl.GL_ARRAY_BUFFER_BINDING)
last_element_array_buffer = gl.glGetParameter(
gl.GL_ELEMENT_ARRAY_BUFFER_BINDING)
last_viewport = gl.glGetParameter(gl.GL_VIEWPORT)
last_enable_blend = gl.glIsEnabled(gl.GL_BLEND),
last_blend_equation = gl.glGetParameter(gl.GL_BLEND_EQUATION_RGB),
last_blend_func = dict(last_blend_equation_alpha=gl.glGetParameter(
gl.GL_BLEND_EQUATION_ALPHA), )
last_gl_states = dict(cull_face=gl.glIsEnabled(gl.GL_CULL_FACE),
depth_test=gl.glIsEnabled(gl.GL_DEPTH_TEST),
scissor_test=gl.glIsEnabled(gl.GL_SCISSOR_TEST))
gloo.set_state(blend=True)
gloo.set_blend_equation('func_add')
gloo.set_blend_func(salpha='src_alpha', dalpha='one_minus_src_alpha')
gloo.set_state(cull_face=False, depth_test=False, scissor_test=True)
gl.glActiveTexture(gl.GL_TEXTURE0)
# Setup viewport, orthographic projection matrix
gloo.set_viewport(0, 0, int(fb_width), int(fb_height))
p = device_objects['program'] # type: gloo.Program
ortho_projection = np.array([[2. / fb_width, 0, 0, 0],
[0., 2. / -fb_height, 0, 0], [0., 0., -1., 0],
[-1., 1., 0, 0]])
vtype = [
('a_position', np.float32, 2),
('a_uv', np.float32, 2),
# ('a_color', np.uint8, 4)]
('a_color', np.uint32, 1)
]
# pos_dtype = [('a_position', np.float32, 2)]
# uv_dtype = [('a_uv', np.float32, 2)]
# color_dtype = [('a_color', np.uint8, 4)]
itype = np.uint16
display_scale = 1.0
p['u_mvp'] = ortho_projection
# print("draw {} cmd_list".format(len(d.cmd_lists)))
for cmd_list in d.cmd_lists:
vertex_count = C.ImDrawList_GetVertexBufferSize(cmd_list)
index_count = C.ImDrawList_GetIndexBufferSize(cmd_list)
vertex_buffer_ptr = C.ImDrawList_GetVertexPtr(cmd_list, 0)
index_buffer_ptr = C.ImDrawList_GetIndexPtr(cmd_list, 0)
def to_nparray(ptr, item_count, dtype):
byte_count = item_count * dtype.itemsize
as_bytes = ffi.buffer(ptr, byte_count)
return np.frombuffer(as_bytes, dtype=dtype)
ig_vertices = to_nparray(vertex_buffer_ptr, vertex_count,
np.dtype(vtype))
ig_indices = to_nparray(index_buffer_ptr, index_count, np.dtype(itype))
# print("{} vertices to draw".format(len(ig_vertices)))
#
p['a_position'] = ig_vertices[:]
# p['a_uv'] = ig_vertices['a_uv']
# p['a_color'] = ig_vertices['a_color']
# device_objects['geometry'] = ig_vertices
#
# gl.glBufferData(gl.GL_ARRAY_BUFFER, ig_vertices, gl.GL_STREAM_DRAW)
# gl.glBufferData(gl.GL_ELEMENT_ARRAY_BUFFER, indices, gl.GL_STREAM_DRAW)
#
# index_buffer_offset = 0
# cmd_size = C.ImDrawList_GetCmdSize(cmd_list)
# for cmd_index in range(cmd_size):
# draw_cmd_ptr = C.ImDrawList_GetCmdPtr(cmd_list, cmd_index)
# draw_cmd = pymgui.ImDrawCmd(draw_cmd_ptr)
#
# if draw_cmd.texture_id:
# gl.glBindTexture(gl.GL_TEXTURE_2D, draw_cmd.texture_id)
# x1, y1, x2, y2 = draw_cmd.clip_rect
#
# gl.glScissor(
# x=int(x1 * display_scale),
# y=int(y1 * display_scale),
# width=int((x2 - x1) * display_scale),
# height=int((y2 - y1) * display_scale)
# )
#
# start, stop = index_buffer_offset, draw_cmd.elem_count
# # gl.glDrawElements(gl.GL_TRIANGLES, draw_cmd.elem_count, gl.GL_UNSIGNED_SHORT, indices[index_buffer_offset:])
# p.draw('triangles', gloo.IndexBuffer(ig_indices[start:stop]))
# index_buffer_offset += draw_cmd.elem_count
#
# # Restore modified state
gloo.set_state(**last_gl_states)
gloo.set_state(blend=last_enable_blend)
# gloo.set_blend_equation(last_blend_equation)
# # gl.glBindVertexArray(0)
# gl.glBindBuffer(gl.GL_ARRAY_BUFFER, 0)
gl.glUseProgram(last_program)