def paint_spikes(self, data, scale=1.0):
"""Render the given array of neuron indexes."""
# convert the data to a VBO
vbo = glvbo.VBO(data)
vbo.bind()
# tell OpenGL that the VBO contains an array of vertices
gl.glEnableVertexAttribArray(0)
# array is a list of unsigned ints
gl.glVertexAttribPointer(0, 1, gl.GL_UNSIGNED_INT,
gl.GL_FALSE, 0, None)
# activate the program
gl.glUseProgram(self.program)
gl.glUniform1f(self.scale, scale)
gl.glEnable(gl.GL_BLEND)
gl.glBlendEquationSeparate(gl.GL_FUNC_ADD, gl.GL_FUNC_ADD)
gl.glBlendFuncSeparate(gl.GL_ONE, gl.GL_ONE,
gl.GL_ZERO, gl.GL_ONE)
# draw the spikes
gl.glDrawArrays(gl.GL_POINTS, 0, len(data))
gl.glDisable(gl.GL_BLEND)
def glfw3_render_gl2(antialiasing,
vertex_buffer_size=512 * 1024,
element_buffer=128 * 1024):
# save the opengl state
last_program = gl.glGetIntegerv(gl.GL_CURRENT_PROGRAM)
last_texture = gl.glGetIntegerv(gl.GL_TEXTURE_BINDING_2D)
last_active_texture = gl.glGetIntegerv(gl.GL_ACTIVE_TEXTURE)
last_array_buffer = gl.glGetIntegerv(gl.GL_ARRAY_BUFFER_BINDING)
last_element_array_buffer = gl.glGetIntegerv(
gl.GL_ELEMENT_ARRAY_BUFFER_BINDING)
last_vertex_array = gl.glGetIntegerv(gl.GL_VERTEX_ARRAY_BINDING)
last_blend_src = gl.glGetIntegerv(gl.GL_BLEND_SRC)
last_blend_dst = gl.glGetIntegerv(gl.GL_BLEND_DST)
last_blend_equation_rgb = gl.glGetIntegerv(gl.GL_BLEND_EQUATION_RGB)
last_blend_equation_alpha = gl.glGetIntegerv(gl.GL_BLEND_EQUATION_ALPHA)
last_viewport = gl.glGetIntegerv(gl.GL_VIEWPORT)
last_scissor_box = gl.glGetIntegerv(gl.GL_SCISSOR_BOX)
last_enable_blend = gl.glIsEnabled(gl.GL_BLEND)
last_enable_cull_face = gl.glIsEnabled(gl.GL_CULL_FACE)
last_enable_depth_test = gl.glIsEnabled(gl.GL_DEPTH_TEST)
last_enable_scissor_test = gl.glIsEnabled(gl.GL_SCISSOR_TEST)
# render nuklear
glfw3_render_prime(antialiasing, vertex_buffer_size, element_buffer)
# restore the opengl state
gl.glUseProgram(last_program)
gl.glActiveTexture(last_active_texture)
gl.glBindTexture(gl.GL_TEXTURE_2D, last_texture)
gl.glBindVertexArray(last_vertex_array)
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, last_array_buffer)
gl.glBindBuffer(gl.GL_ELEMENT_ARRAY_BUFFER, last_element_array_buffer)
gl.glBlendEquationSeparate(last_blend_equation_rgb,
last_blend_equation_alpha)
gl.glBlendFunc(last_blend_src, last_blend_dst)
if last_enable_blend:
gl.glEnable(gl.GL_BLEND)
else:
gl.glDisable(gl.GL_BLEND)
if last_enable_cull_face:
gl.glEnable(gl.GL_CULL_FACE)
else:
gl.glDisable(gl.GL_CULL_FACE)
if last_enable_depth_test:
gl.glEnable(gl.GL_DEPTH_TEST)
else:
gl.glDisable(gl.GL_DEPTH_TEST)
if last_enable_scissor_test:
gl.glEnable(gl.GL_SCISSOR_TEST)
else:
gl.glDisable(gl.GL_SCISSOR_TEST)
gl.glViewport(last_viewport[0], last_viewport[1], last_viewport[2],
last_viewport[3])
gl.glScissor(last_scissor_box[0], last_scissor_box[1], last_scissor_box[2],
last_scissor_box[3])
def setup_blend(self):
GL.glEnable(GL.GL_BLEND)
if self.use_separate_blend:
GL.glBlendEquationSeparate(*self.blend_equation_separate)
GL.glBlendFuncSeparate(*self.blend_func_separate)
else:
GL.glBlendEquation(self.blend_equation)
GL.glBlendFunc(*self.blend_func)
GL.glEnable(GL.GL_DEPTH_TEST)
GL.glDepthFunc(self.depth_test)
def shader_test(event_coll, event):
"""Use transfer function shader"""
print("Changing shader to projection")
scene = event_coll.scene
for coll in scene.collections:
coll.set_shader("default.v")
coll.set_shader("transfer_function.f")
scene.set_shader("passthrough.v")
scene.set_shader("noop.f")
for collection in scene.collections:
collection.set_fields_log(True)
#scene.update_minmax()
# https://www.opengl.org/sdk/docs/man/html/glBlendFunc.xhtml
GL.glBlendEquationSeparate(GL.GL_FUNC_ADD, GL.GL_FUNC_ADD)
GL.glBlendFuncSeparate(GL.GL_ONE, GL.GL_ONE_MINUS_SRC_ALPHA, GL.GL_ONE,
GL.GL_ZERO)
return True
def glfw3_render(antialiasing,
vertex_buffer_size=512 * 1024,
element_buffer=128 * 1024):
# save the opengl state
last_blend_src = gl.glGetIntegerv(gl.GL_BLEND_SRC)
last_blend_dst = gl.glGetIntegerv(gl.GL_BLEND_DST)
last_blend_equation_rgb = gl.glGetIntegerv(gl.GL_BLEND_EQUATION_RGB)
last_blend_equation_alpha = gl.glGetIntegerv(gl.GL_BLEND_EQUATION_ALPHA)
last_viewport = gl.glGetIntegerv(gl.GL_VIEWPORT)
last_scissor_box = gl.glGetIntegerv(gl.GL_SCISSOR_BOX)
last_enable_blend = gl.glIsEnabled(gl.GL_BLEND)
last_enable_cull_face = gl.glIsEnabled(gl.GL_CULL_FACE)
last_enable_depth_test = gl.glIsEnabled(gl.GL_DEPTH_TEST)
last_enable_scissor_test = gl.glIsEnabled(gl.GL_SCISSOR_TEST)
# render nuklear
glfw3_render_prime(antialiasing, vertex_buffer_size, element_buffer)
# restore the opengl state
gl.glBlendEquationSeparate(last_blend_equation_rgb,
last_blend_equation_alpha)
gl.glBlendFunc(last_blend_src, last_blend_dst)
if last_enable_blend:
gl.glEnable(gl.GL_BLEND)
else:
gl.glDisable(gl.GL_BLEND)
if last_enable_cull_face:
gl.glEnable(gl.GL_CULL_FACE)
else:
gl.glDisable(gl.GL_CULL_FACE)
if last_enable_depth_test:
gl.glEnable(gl.GL_DEPTH_TEST)
else:
gl.glDisable(gl.GL_DEPTH_TEST)
if last_enable_scissor_test:
gl.glEnable(gl.GL_SCISSOR_TEST)
else:
gl.glDisable(gl.GL_SCISSOR_TEST)
gl.glViewport(last_viewport[0], last_viewport[1], last_viewport[2],
last_viewport[3])
gl.glScissor(last_scissor_box[0], last_scissor_box[1], last_scissor_box[2],
last_scissor_box[3])
def render(self, draw_data):
# perf: local for faster access
io = self.io
display_width, display_height = self.io.display_size
fb_width = int(display_width * io.display_fb_scale[0])
fb_height = int(display_height * io.display_fb_scale[1])
if fb_width == 0 or fb_height == 0:
return
draw_data.scale_clip_rects(*io.display_fb_scale)
# backup GL state
# todo: provide cleaner version of this backup-restore code
last_program = gl.glGetIntegerv(gl.GL_CURRENT_PROGRAM)
last_texture = gl.glGetIntegerv(gl.GL_TEXTURE_BINDING_2D)
last_active_texture = gl.glGetIntegerv(gl.GL_ACTIVE_TEXTURE)
last_array_buffer = gl.glGetIntegerv(gl.GL_ARRAY_BUFFER_BINDING)
last_element_array_buffer = gl.glGetIntegerv(
gl.GL_ELEMENT_ARRAY_BUFFER_BINDING)
last_vertex_array = gl.glGetIntegerv(gl.GL_VERTEX_ARRAY_BINDING)
last_blend_src = gl.glGetIntegerv(gl.GL_BLEND_SRC)
last_blend_dst = gl.glGetIntegerv(gl.GL_BLEND_DST)
last_blend_equation_rgb = gl.glGetIntegerv(gl.GL_BLEND_EQUATION_RGB)
last_blend_equation_alpha = gl.glGetIntegerv(
gl.GL_BLEND_EQUATION_ALPHA)
last_viewport = gl.glGetIntegerv(gl.GL_VIEWPORT)
last_scissor_box = gl.glGetIntegerv(gl.GL_SCISSOR_BOX)
last_enable_blend = gl.glIsEnabled(gl.GL_BLEND)
last_enable_cull_face = gl.glIsEnabled(gl.GL_CULL_FACE)
last_enable_depth_test = gl.glIsEnabled(gl.GL_DEPTH_TEST)
last_enable_scissor_test = gl.glIsEnabled(gl.GL_SCISSOR_TEST)
gl.glEnable(gl.GL_BLEND)
gl.glBlendEquation(gl.GL_FUNC_ADD)
gl.glBlendFunc(gl.GL_SRC_ALPHA, gl.GL_ONE_MINUS_SRC_ALPHA)
gl.glDisable(gl.GL_CULL_FACE)
gl.glDisable(gl.GL_DEPTH_TEST)
gl.glEnable(gl.GL_SCISSOR_TEST)
gl.glActiveTexture(gl.GL_TEXTURE0)
gl.glViewport(0, 0, int(fb_width), int(fb_height))
ortho_projection = [[2.0 / display_width, 0.0, 0.0, 0.0],
[0.0, 2.0 / -display_height, 0.0, 0.0],
[0.0, 0.0, -1.0, 0.0], [-1.0, 1.0, 0.0, 1.0]]
gl.glUseProgram(self._shader_handle)
gl.glUniform1i(self._attrib_location_tex, 0)
gl.glUniformMatrix4fv(self._attrib_proj_mtx, 1, gl.GL_FALSE,
ortho_projection)
gl.glBindVertexArray(self._vao_handle)
for commands in draw_data.commands_lists:
idx_buffer_offset = 0
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, self._vbo_handle)
# todo: check this (sizes)
gl.glBufferData(gl.GL_ARRAY_BUFFER,
commands.vtx_buffer_size * imgui.VERTEX_SIZE,
ctypes.c_void_p(commands.vtx_buffer_data),
gl.GL_STREAM_DRAW)
gl.glBindBuffer(gl.GL_ELEMENT_ARRAY_BUFFER, self._elements_handle)
# todo: check this (sizes)
gl.glBufferData(gl.GL_ELEMENT_ARRAY_BUFFER,
commands.idx_buffer_size * imgui.INDEX_SIZE,
ctypes.c_void_p(commands.idx_buffer_data),
gl.GL_STREAM_DRAW)
# todo: allow to iterate over _CmdList
for command in commands.commands:
gl.glBindTexture(gl.GL_TEXTURE_2D, command.texture_id)
# todo: use named tuple
x, y, w, z = command.clip_rect
gl.glScissor(int(x), int(fb_height - w), int(z - x),
int(w - y))
if imgui.INDEX_SIZE == 2:
gltype = gl.GL_UNSIGNED_SHORT
else:
gltype = gl.GL_UNSIGNED_INT
gl.glDrawElements(gl.GL_TRIANGLES, command.elem_count, gltype,
ctypes.c_void_p(idx_buffer_offset))
idx_buffer_offset += command.elem_count * imgui.INDEX_SIZE
# restore modified GL state
gl.glUseProgram(last_program)
gl.glActiveTexture(last_active_texture)
gl.glBindTexture(gl.GL_TEXTURE_2D, last_texture)
gl.glBindVertexArray(last_vertex_array)
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, last_array_buffer)
gl.glBindBuffer(gl.GL_ELEMENT_ARRAY_BUFFER, last_element_array_buffer)
gl.glBlendEquationSeparate(last_blend_equation_rgb,
last_blend_equation_alpha)
gl.glBlendFunc(last_blend_src, last_blend_dst)
if last_enable_blend:
gl.glEnable(gl.GL_BLEND)
else:
gl.glDisable(gl.GL_BLEND)
if last_enable_cull_face:
gl.glEnable(gl.GL_CULL_FACE)
else:
gl.glDisable(gl.GL_CULL_FACE)
if last_enable_depth_test:
gl.glEnable(gl.GL_DEPTH_TEST)
else:
gl.glDisable(gl.GL_DEPTH_TEST)
if last_enable_scissor_test:
gl.glEnable(gl.GL_SCISSOR_TEST)
else:
gl.glDisable(gl.GL_SCISSOR_TEST)
gl.glViewport(last_viewport[0], last_viewport[1], last_viewport[2],
last_viewport[3])
gl.glScissor(last_scissor_box[0], last_scissor_box[1],
last_scissor_box[2], last_scissor_box[3])
def render(self, draw_data):
# perf: local for faster access
io = self.io
display_width, display_height = io.display_size
fb_width = int(display_width * io.display_fb_scale[0])
fb_height = int(display_height * io.display_fb_scale[1])
if fb_width == 0 or fb_height == 0:
return
draw_data.scale_clip_rects(*io.display_fb_scale)
# note: we are using fixed pipeline for cocos2d/pyglet
# todo: consider porting to programmable pipeline
# backup gl state
last_texture = gl.glGetIntegerv(gl.GL_TEXTURE_BINDING_2D)
last_viewport = gl.glGetIntegerv(gl.GL_VIEWPORT)
last_enable_blend = gl.glIsEnabled(gl.GL_BLEND)
last_enable_cull_face = gl.glIsEnabled(gl.GL_CULL_FACE)
last_enable_depth_test = gl.glIsEnabled(gl.GL_DEPTH_TEST)
last_enable_scissor_test = gl.glIsEnabled(gl.GL_SCISSOR_TEST)
last_scissor_box = gl.glGetIntegerv(gl.GL_SCISSOR_BOX)
last_blend_src = gl.glGetIntegerv(gl.GL_BLEND_SRC)
last_blend_dst = gl.glGetIntegerv(gl.GL_BLEND_DST)
last_blend_equation_rgb = gl.glGetIntegerv(gl.GL_BLEND_EQUATION_RGB)
last_blend_equation_alpha = gl.glGetIntegerv(
gl.GL_BLEND_EQUATION_ALPHA)
gl.glPushAttrib(gl.GL_ENABLE_BIT | gl.GL_COLOR_BUFFER_BIT
| gl.GL_TRANSFORM_BIT)
gl.glEnable(gl.GL_BLEND)
gl.glBlendFunc(gl.GL_SRC_ALPHA, gl.GL_ONE_MINUS_SRC_ALPHA)
gl.glDisable(gl.GL_CULL_FACE)
gl.glDisable(gl.GL_DEPTH_TEST)
gl.glEnable(gl.GL_SCISSOR_TEST)
gl.glEnableClientState(gl.GL_VERTEX_ARRAY)
gl.glEnableClientState(gl.GL_TEXTURE_COORD_ARRAY)
gl.glEnableClientState(gl.GL_COLOR_ARRAY)
gl.glEnable(gl.GL_TEXTURE_2D)
gl.glViewport(0, 0, int(fb_width), int(fb_height))
gl.glMatrixMode(gl.GL_PROJECTION)
gl.glPushMatrix()
gl.glLoadIdentity()
gl.glOrtho(0, io.display_size.x, io.display_size.y, 0.0, -1., 1.)
gl.glMatrixMode(gl.GL_MODELVIEW)
gl.glPushMatrix()
gl.glLoadIdentity()
for commands in draw_data.commands_lists:
idx_buffer = commands.idx_buffer_data
gl.glVertexPointer(
2, gl.GL_FLOAT, imgui.VERTEX_SIZE,
ctypes.c_void_p(commands.vtx_buffer_data +
imgui.VERTEX_BUFFER_POS_OFFSET))
gl.glTexCoordPointer(
2, gl.GL_FLOAT, imgui.VERTEX_SIZE,
ctypes.c_void_p(commands.vtx_buffer_data +
imgui.VERTEX_BUFFER_UV_OFFSET))
gl.glColorPointer(
4, gl.GL_UNSIGNED_BYTE, imgui.VERTEX_SIZE,
ctypes.c_void_p(commands.vtx_buffer_data +
imgui.VERTEX_BUFFER_COL_OFFSET))
for command in commands.commands:
gl.glBindTexture(gl.GL_TEXTURE_2D, command.texture_id)
x, y, z, w = command.clip_rect
gl.glScissor(int(x), int(fb_height - w), int(z - x),
int(w - y))
if imgui.INDEX_SIZE == 2:
gltype = gl.GL_UNSIGNED_SHORT
else:
gltype = gl.GL_UNSIGNED_INT
gl.glDrawElements(gl.GL_TRIANGLES, command.elem_count, gltype,
ctypes.c_void_p(idx_buffer))
idx_buffer += (command.elem_count * imgui.INDEX_SIZE)
gl.glBlendEquationSeparate(last_blend_equation_rgb,
last_blend_equation_alpha)
gl.glBlendFunc(last_blend_src, last_blend_dst)
if last_enable_blend:
gl.glEnable(gl.GL_BLEND)
else:
gl.glDisable(gl.GL_BLEND)
if last_enable_cull_face:
gl.glEnable(gl.GL_CULL_FACE)
else:
gl.glDisable(gl.GL_CULL_FACE)
if last_enable_depth_test:
gl.glEnable(gl.GL_DEPTH_TEST)
else:
gl.glDisable(gl.GL_DEPTH_TEST)
if last_enable_scissor_test:
gl.glEnable(gl.GL_SCISSOR_TEST)
else:
gl.glDisable(gl.GL_SCISSOR_TEST)
gl.glScissor(last_scissor_box[0], last_scissor_box[1],
last_scissor_box[2], last_scissor_box[3])
gl.glDisableClientState(gl.GL_COLOR_ARRAY)
gl.glDisableClientState(gl.GL_TEXTURE_COORD_ARRAY)
gl.glDisableClientState(gl.GL_VERTEX_ARRAY)
if last_texture:
gl.glBindTexture(gl.GL_TEXTURE_2D, last_texture)
gl.glMatrixMode(gl.GL_MODELVIEW)
gl.glPopMatrix()
gl.glMatrixMode(gl.GL_PROJECTION)
gl.glPopMatrix()
gl.glPopAttrib()
gl.glViewport(last_viewport[0], last_viewport[1], last_viewport[2],
last_viewport[3])
