def draw(self):
""" Draw the vertex array as points. """
self.bind()
GL.glDrawArrays(GL.GL_POINTS, 0, self._number_of_items)
self.unbind()
def draw(self):
""" Draw the vertex array as lines. """
if self._number_of_objects >= 2:
self.bind()
GL.glDrawArrays(GL.GL_LINES, 0, self._number_of_objects)
self.unbind()
def draw(self):
""" Draw the vertex array as lines. """
if self._number_of_objects >= 2:
self.bind()
GL.glDrawArrays(GL.GL_LINE_STRIP_ADJACENCY, 0, self._number_of_objects +2)
self.unbind()
def draw(self, shader_program):
# Freetype renders glyph as grayscale: white foreground on black background
# If the LCD filter is enabled then the pixels on border are coloured.
# black fragment should be discarded
#
# Blending equation for transparency:
# O = (1-Sa)*D + Sa*S
# if Sa = 1 then O = S overwrite
# = 0 then O = D keep the value
#
# Grayscale case:
# S = luminosity * colour grayscale = luminosity
# Sa = average luminosity * alpha ???
#
# LCD case:
# white -> red : (1,1,1) -> (1,0,0)
# Blending: O = Sf*S + Df*D
# where S is the colour from the fragment shader and D the colour from the framebuffer
# alpha: fully transparent = 0 and fully opaque = 1
# Sa = average luminosity * colour aplha
#
# Set (Sf, Df) for transparency: O = Sa*S + (1-Sa)*D
GL.glEnable(GL.GL_BLEND)
GL.glBlendFunc(GL.GL_SRC_ALPHA, GL.GL_ONE_MINUS_SRC_ALPHA)
shader_program.bind()
self._image_texture.bind()
self.bind()
shader_program.uniforms.font_atlas = 0
# shader_program.uniforms.gamma = 1.
GL.glDrawArrays(GL.GL_POINTS, 0, self._number_of_items)
self.unbind()
self._image_texture.unbind()
shader_program.unbind()
GL.glDisable(GL.GL_BLEND)
def draw(self, shader_program):
# Freetype renders glyph as grayscale: white foreground on black background
# If the LCD filter is enabled then the pixels on border are coloured.
# black fragment should be discarded
#
# Blending equation for transparency:
# O = (1-Sa)*D + Sa*S
# if Sa = 1 then O = S overwrite
# = 0 then O = D keep the value
#
# Grayscale case:
# S = luminosity * colour grayscale = luminosity
# Sa = average luminosity * alpha ???
#
# LCD case:
# white -> red : (1,1,1) -> (1,0,0)
# Blending: O = Sf*S + Df*D
# where S is the colour from the fragment shader and D the colour from the framebuffer
# alpha: fully transparent = 0 and fully opaque = 1
# Sa = average luminosity * colour aplha
#
# Set (Sf, Df) for transparency: O = Sa*S + (1-Sa)*D
GL.glEnable(GL.GL_BLEND)
GL.glBlendFunc(GL.GL_SRC_ALPHA, GL.GL_ONE_MINUS_SRC_ALPHA)
shader_program.bind()
self._image_texture.bind()
self.bind()
shader_program.uniforms.font_atlas = 0
# shader_program.uniforms.gamma = 1.
GL.glDrawArrays(GL.GL_POINTS, 0, self._number_of_items)
self.unbind()
self._image_texture.unbind()
shader_program.unbind()
GL.glDisable(GL.GL_BLEND)
def draw(self):
""" Draw the vertex array as points. """
self.bind()
GL.glDrawArrays(GL.GL_POINTS, 0, self._number_of_items)
self.unbind()
def draw(self):
self.bind()
GL.glDrawArrays(GL.GL_POINTS, 0, self._number_of_items)
self.unbind()
def draw(self):
self.bind()
GL.glDrawArrays(GL.GL_POINTS, 0, self._number_of_items)
self.unbind()