def paint_path(self):
# Unbind shader /!\
# GL.glClearStencil(0)
# GL.glClearColor(0,0,0,0)
# # GL.glClear(GL.GL_COLOR_BUFFER_BIT)
# GL.glStencilMask(~0)
# GL.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_STENCIL_BUFFER_BIT)
filling = False # /!\ clear framebuffer
even_odd = True
stroking = True
if filling:
nvpath.glStencilFillPathNV(self.path_object, nvpath.GL_COUNT_UP_NV, 0x1F)
GL.glEnable(GL.GL_STENCIL_TEST)
if even_odd:
GL.glStencilFunc(GL.GL_NOTEQUAL, 0, 0x1)
else:
GL.glStencilFunc(GL.GL_NOTEQUAL, 0, 0x1F)
GL.glStencilOp(GL.GL_KEEP, GL.GL_KEEP, GL.GL_ZERO)
GL.glColor3f(0,1,0) # green
nvpath.glCoverFillPathNV(self.path_object, nvpath.GL_BOUNDING_BOX_NV)
if stroking:
nvpath.glStencilStrokePathNV(self.path_object, 0x1, ~0)
GL.glColor3f(1,1,0) # yellow
nvpath.glCoverStrokePathNV(self.path_object, nvpath.GL_CONVEX_HULL_NV)
def initializeGL(self):
self._logger.debug('Initialise GL')
super(GlWidget, self).initializeGL()
GL.glEnable(GL.GL_POINT_SMOOTH) #compat#
GL.glEnable(GL.GL_LINE_SMOOTH) #compat#
self._init_shader()
self._paint_page = False
def initializeGL(self):
self.logger.debug('Initialise GL')
super(GlWidget, self).initializeGL()
# Require compatibility profile
GL.glEnable(GL.GL_POINT_SMOOTH)
GL.glEnable(GL.GL_LINE_SMOOTH)
self._init_shader()
self.create_vertex_array_objects()
def initializeGL(self):
self.logger.debug('Initialise GL')
super(GlWidget, self).initializeGL()
GL.glEnable(GL.GL_POINT_SMOOTH)
GL.glEnable(GL.GL_LINE_SMOOTH)
# self.qglClearColor(QtCore.Qt.black)
# GL.glPointSize(5.)
# GL.glLineWidth(3.)
self._init_shader()
self.create_vertex_array_objects()
def paint_object(self):
GL.glPolygonMode(GL.GL_FRONT_AND_BACK, GL.GL_FILL)
GL.glEnable(GL.GL_POLYGON_OFFSET_FILL)
GL.glPolygonOffset(1., 1.)
# shader_program = self.shader_manager.basic_shader_program
shader_program = self.shader_manager.lighting_shader_program
# shader_program.light.Position = (0, 0, 100, 1)
shader_program.bind()
self.object_vertex_array.draw()
GL.glDisable(GL.GL_POLYGON_OFFSET_FILL)
GL.glPolygonMode(GL.GL_FRONT_AND_BACK, GL.GL_LINE)
GL.glLineWidth(1.)
shader_program = self.shader_manager.fixed_colour_shader_program
shader_program.bind()
self.object_vertex_array.draw()
shader_program.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)