def draw_text(self, text, color=(1.0, 1.0, 1.0, 0.0),
view_matrix=None, projection_matrix=None):
gl.glUseProgram(self._program_id)
gl.glActiveTexture(gl.GL_TEXTURE0+0)
gl.glBindTexture(gl.GL_TEXTURE_2D, self._texture_id)
gl.glBindSampler(0, self._sampler_id)
gl.glUniform1i(self._uniform_locations['u_fonttex'], 0)
gl.glUniform4f(self._uniform_locations['u_color'], *color)
if view_matrix is not None:
self._matrix.dot(view_matrix, out=self._modelview_matrix)
gl.glUniformMatrix4fv(self._uniform_locations['u_modelviewMatrix'], 1, False, self._modelview_matrix)
if projection_matrix is not None:
gl.glUniformMatrix4fv(self._uniform_locations['u_projectionMatrix'], 1, False, projection_matrix)
gl.glEnableVertexAttribArray(0)
gl.glEnableVertexAttribArray(1)
gl.glEnable(gl.GL_BLEND)
gl.glBlendFunc(gl.GL_SRC_ALPHA, gl.GL_ONE_MINUS_SRC_ALPHA)
x = 0.0
text = [ord(c) - 32 for c in text]
for i in text:
if i >= 0 and i < 95:
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, self._buffer_ids[i])
gl.glVertexAttribPointer(0, 2, gl.GL_FLOAT, False, 0, c_void_p(0))
gl.glVertexAttribPointer(1, 2, gl.GL_FLOAT, False, 0, c_void_p(8*4))
gl.glUniform1f(self._uniform_locations['advance'], x)
gl.glDrawArrays(gl.GL_TRIANGLE_STRIP, 0, 4)
x += self._advance[i]
gl.glDisableVertexAttribArray(0)
gl.glDisableVertexAttribArray(1)
gl.glDisable(gl.GL_BLEND)
def use(self, location=0):
"""
Use this sampler in the specified texture unit
:param location: The texture unit (int)
"""
GL.glBindSampler(location, self._id)
def set_material_state(material_name, gltf):
if set_material_state.current_material == material_name:
return
set_material_state.current_material = material_name
set_material_state.n_tex = 0
material = gltf['materials'][material_name]
set_technique_state(material['technique'], gltf)
technique = gltf['techniques'][material['technique']]
program = gltf['programs'][technique['program']]
textures = gltf.get('textures', {})
samplers = gltf.get('samplers', {})
material_values = material.get('values', {})
for uniform_name, parameter_name in technique['uniforms'].items():
parameter = technique['parameters'][parameter_name]
if 'semantic' in parameter:
continue
value = material_values.get(parameter_name,
parameter.get('value',
_DEFAULT_MATERIAL_VALUES_BY_PARAM_TYPE.get(parameter['type'])))
if value is None:
raise Exception('''could not determine a value to use for material "%s", parameter "%s":
%s %s''' % (material_name, parameter_name,
parameter['type'], uniform_name))
if isinstance(value, (tuple, list)):
value = np.array(value, dtype=np.float32)
if uniform_name in program['uniform_locations']:
location = program['uniform_locations'][uniform_name]
else:
location = gl.glGetUniformLocation(program['id'], uniform_name)
program['uniform_locations'][uniform_name] = location
if parameter['type'] == gl.GL_SAMPLER_2D:
texture = textures[value]
gl.glActiveTexture(gl.GL_TEXTURE0 + set_material_state.n_tex)
gl.glBindTexture(texture['target'], texture['id'])
gl.glBindSampler(gl.GL_TEXTURE0 + set_material_state.n_tex,
samplers[texture['sampler']]['id'])
gl.glUniform1i(location, set_material_state.n_tex)
set_material_state.n_tex += 1
elif parameter['type'] == gl.GL_INT:
gl.glUniform1i(location, value)
elif parameter['type'] == gl.GL_FLOAT:
gl.glUniform1f(location, value)
elif parameter['type'] == gl.GL_FLOAT_VEC2:
gl.glUniform2f(location, *value)
elif parameter['type'] == gl.GL_FLOAT_VEC3:
gl.glUniform3f(location, *value)
elif parameter['type'] == gl.GL_FLOAT_VEC4:
gl.glUniform4f(location, *value)
elif parameter['type'] == gl.GL_FLOAT_MAT2:
gl.glUniformMatrix2fv(location, 1, False, value)
elif parameter['type'] == gl.GL_FLOAT_MAT3:
gl.glUniformMatrix3fv(location, 1, False, value)
elif parameter['type'] == gl.GL_FLOAT_MAT4:
gl.glUniformMatrix4fv(location, 1, False, value)
else:
raise Exception('unhandled parameter type: %s' % parameter['type'])
if CHECK_GL_ERRORS:
if gl.glGetError() != gl.GL_NO_ERROR:
raise Exception('error setting material state')
def set_material_state(material_name, gltf):
if set_material_state.current_material == material_name:
return
set_material_state.current_material = material_name
material = gltf['materials'][material_name]
set_technique_state(material['technique'], gltf)
technique = gltf['techniques'][material['technique']]
program = gltf['programs'][technique['program']]
textures = gltf.get('textures', {})
samplers = gltf.get('samplers', {})
material_values = material.get('values', {})
for uniform_name, parameter_name in technique['uniforms'].items():
parameter = technique['parameters'][parameter_name]
if 'semantic' in parameter:
continue
value = material_values.get(parameter_name, parameter.get('value'))
if value:
if uniform_name in program['uniform_locations']:
location = program['uniform_locations'][uniform_name]
else:
location = gl.glGetUniformLocation(program['id'], uniform_name)
program['uniform_locations'][uniform_name] = location
if parameter['type'] == gl.GL_SAMPLER_2D:
texture = textures[value]
gl.glActiveTexture(gl.GL_TEXTURE0 + 0)
gl.glBindTexture(texture['target'], texture['id'])
gl.glBindSampler(0, samplers[texture['sampler']]['id'])
gl.glUniform1i(location, 0)
elif parameter['type'] == gl.GL_FLOAT:
gl.glUniform1f(location, value)
elif parameter['type'] == gl.GL_FLOAT_VEC2:
gl.glUniform2f(location, *value)
elif parameter['type'] == gl.GL_FLOAT_VEC3:
gl.glUniform3f(location, *value)
elif parameter['type'] == gl.GL_FLOAT_VEC4:
gl.glUniform4f(location, *value)
else:
raise Exception('unhandled parameter type: %s' %
parameter['type'])
else:
raise Exception('no value provided for parameter "%s"' %
parameter_name)
if CHECK_GL_ERRORS:
if gl.glGetError() != gl.GL_NO_ERROR:
raise Exception('error setting material state')
def set_material_state(material_name, gltf):
if set_material_state.current_material == material_name:
return
set_material_state.current_material = material_name
material = gltf['materials'][material_name]
set_technique_state(material['technique'], gltf)
technique = gltf['techniques'][material['technique']]
program = gltf['programs'][technique['program']]
textures = gltf.get('textures', {})
samplers = gltf.get('samplers', {})
material_values = material.get('values', {})
for uniform_name, parameter_name in technique['uniforms'].items():
parameter = technique['parameters'][parameter_name]
if 'semantic' in parameter:
continue
value = material_values.get(parameter_name, parameter.get('value'))
if value:
if uniform_name in program['uniform_locations']:
location = program['uniform_locations'][uniform_name]
else:
location = gl.glGetUniformLocation(program['id'], uniform_name)
program['uniform_locations'][uniform_name] = location
if parameter['type'] == gl.GL_SAMPLER_2D:
texture = textures[value]
gl.glActiveTexture(gl.GL_TEXTURE0+0)
gl.glBindTexture(texture['target'], texture['id'])
gl.glBindSampler(0, samplers[texture['sampler']]['id'])
gl.glUniform1i(location, 0)
elif parameter['type'] == gl.GL_FLOAT:
gl.glUniform1f(location, value)
elif parameter['type'] == gl.GL_FLOAT_VEC2:
gl.glUniform2f(location, *value)
elif parameter['type'] == gl.GL_FLOAT_VEC3:
gl.glUniform3f(location, *value)
elif parameter['type'] == gl.GL_FLOAT_VEC4:
gl.glUniform4f(location, *value)
else:
raise Exception('unhandled parameter type: %s' % parameter['type'])
else:
raise Exception('no value provided for parameter "%s"' % parameter_name)
if CHECK_GL_ERRORS:
if gl.glGetError() != gl.GL_NO_ERROR:
raise Exception('error setting material state')
def draw_text(self,
text,
color=(1.0, 1.0, 1.0, 0.0),
view_matrix=None,
projection_matrix=None):
gl.glUseProgram(self._program_id)
gl.glActiveTexture(gl.GL_TEXTURE0 + 0)
gl.glBindTexture(gl.GL_TEXTURE_2D, self._texture_id)
gl.glBindSampler(0, self._sampler_id)
gl.glUniform1i(self._uniform_locations['u_fonttex'], 0)
gl.glUniform4f(self._uniform_locations['u_color'], *color)
if view_matrix is not None:
self._matrix.dot(view_matrix, out=self._modelview_matrix)
gl.glUniformMatrix4fv(self._uniform_locations['u_modelviewMatrix'],
1, False, self._modelview_matrix)
if projection_matrix is not None:
gl.glUniformMatrix4fv(
self._uniform_locations['u_projectionMatrix'], 1, False,
projection_matrix)
gl.glEnableVertexAttribArray(0)
gl.glEnableVertexAttribArray(1)
gl.glEnable(gl.GL_BLEND)
gl.glBlendFunc(gl.GL_SRC_ALPHA, gl.GL_ONE_MINUS_SRC_ALPHA)
x = 0.0
text = [ord(c) - 32 for c in text]
for i in text:
if i >= 0 and i < 95:
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, self._buffer_ids[i])
gl.glVertexAttribPointer(0, 2, gl.GL_FLOAT, False, 0,
c_void_p(0))
gl.glVertexAttribPointer(1, 2, gl.GL_FLOAT, False, 0,
c_void_p(8 * 4))
gl.glUniform1f(self._uniform_locations['advance'], x)
gl.glDrawArrays(gl.GL_TRIANGLE_STRIP, 0, 4)
x += self._advance[i]
gl.glDisableVertexAttribArray(0)
gl.glDisableVertexAttribArray(1)
gl.glDisable(gl.GL_BLEND)
def use(self, **frame_data):
# if Material._current is self:
# return
if not self._initialized:
self.init_gl()
self.technique.use()
if self._on_use:
self._on_use(self, **frame_data)
tex_unit = 0
for uniform_name, location in self.technique.uniform_locations.items():
uniform = self.technique.uniforms[uniform_name]
uniform_type = uniform['type']
if uniform_type in (gl.GL_SAMPLER_2D, gl.GL_SAMPLER_CUBE):
texture = self.textures[uniform_name]
gl.glActiveTexture(gl.GL_TEXTURE0 + tex_unit)
gl.glBindTexture(uniform_type, texture.texture_id)
gl.glBindSampler(tex_unit, texture.sampler_id)
gl.glUniform1i(location, tex_unit)
tex_unit += 1
continue
elif uniform_name in self.values:
value = self.values[uniform_name]
elif uniform_name in frame_data:
value = frame_data[uniform_name]
else:
continue
if 'array_size' in uniform:
ARRAY_TYPE_TO_UNIFORM_FN[uniform_type](location,
uniform['array_size'],
value)
else:
TYPE_TO_UNIFORM_FN[uniform_type](location, value)
if CHECK_GL_ERRORS:
err = gl.glGetError()
if err != gl.GL_NO_ERROR:
raise Exception('error setting material state: %d' % err)
Material._current = self
def use(self,
u_view=None,
u_modelview=None,
u_projection=None,
u_modelview_inverse_transpose=None,
u_modelview_inverse=None,
u_model=None,
frame_data=None):
# if Material._current is self:
# return
if not self._initialized:
self.init_gl()
self.technique.use()
if self._on_use:
self._on_use(self, frame_data)
tex_unit = 0
for uniform_name, location in self.technique.uniform_locations.items():
uniform = self.technique.uniforms[uniform_name]
uniform_type = uniform['type']
if uniform_type == gl.GL_SAMPLER_2D:
texture = self.textures[uniform_name]
gl.glActiveTexture(gl.GL_TEXTURE0 + tex_unit)
gl.glBindTexture(gl.GL_TEXTURE_2D, texture.texture_id)
gl.glBindSampler(tex_unit, texture.sampler_id)
gl.glUniform1i(location, tex_unit)
tex_unit += 1
elif uniform_type == gl.GL_SAMPLER_CUBE:
texture = self.textures[uniform_name]
gl.glActiveTexture(gl.GL_TEXTURE0 + tex_unit)
gl.glBindTexture(gl.GL_TEXTURE_CUBE_MAP, texture.texture_id)
gl.glBindSampler(tex_unit, texture.sampler_id)
gl.glUniform1i(location, tex_unit)
tex_unit += 1
elif uniform_name in self.values:
value = self.values[uniform_name]
if uniform_type == gl.GL_FLOAT:
gl.glUniform1f(location, value)
elif uniform_type == gl.GL_FLOAT_VEC2:
gl.glUniform2f(location, *value)
elif uniform_type == gl.GL_FLOAT_VEC3:
gl.glUniform3f(location, *value)
elif uniform_type == gl.GL_FLOAT_VEC4:
gl.glUniform4f(location, *value)
else:
raise Exception('unhandled uniform type: %d' %
uniform_type)
else:
if u_modelview is not None and uniform_name == 'u_modelview':
gl.glUniformMatrix4fv(location, 1, False, u_modelview)
elif u_modelview_inverse is not None and uniform_name == 'u_modelview_inverse':
gl.glUniformMatrix4fv(location, 1, False,
u_modelview_inverse)
elif u_model is not None and uniform_name == 'u_model':
gl.glUniformMatrix4fv(location, 1, False, u_model)
elif u_view is not None and uniform_name == 'u_view':
gl.glUniformMatrix4fv(location, 1, False, u_view)
elif u_projection is not None and uniform_name == 'u_projection':
gl.glUniformMatrix4fv(location, 1, False, u_projection)
elif u_modelview_inverse_transpose is not None and uniform_name == 'u_modelview_inverse_transpose':
gl.glUniformMatrix3fv(location, 1, False,
u_modelview_inverse_transpose)
if CHECK_GL_ERRORS:
err = gl.glGetError()
if err != gl.GL_NO_ERROR:
raise Exception('error setting material state: %d' % err)
Material._current = self
def init_gl(self):
if self._gl_initialized:
return
import OpenGL.GL as gl
self._texture_unit = 4
vs_id = gl.glCreateShader(gl.GL_VERTEX_SHADER)
gl.glShaderSource(vs_id, self._VERT_SHADER_SRC)
gl.glCompileShader(vs_id)
if not gl.glGetShaderiv(vs_id, gl.GL_COMPILE_STATUS):
raise Exception('failed to compile %s vertex shader:\n%s' %
(self.__class__.__name__,
gl.glGetShaderInfoLog(vs_id).decode()))
fs_id = gl.glCreateShader(gl.GL_FRAGMENT_SHADER)
gl.glShaderSource(fs_id, self._FRAG_SHADER_SRC)
gl.glCompileShader(fs_id)
if not gl.glGetShaderiv(fs_id, gl.GL_COMPILE_STATUS):
raise Exception('failed to compile %s fragment shader:\n%s' %
(self.__class__.__name__,
gl.glGetShaderInfoLog(fs_id).decode()))
self._program_id = gl.glCreateProgram()
gl.glAttachShader(self._program_id, vs_id)
gl.glAttachShader(self._program_id, fs_id)
gl.glLinkProgram(self._program_id)
gl.glDetachShader(self._program_id, vs_id)
gl.glDetachShader(self._program_id, fs_id)
if not gl.glGetProgramiv(self._program_id, gl.GL_LINK_STATUS):
raise Exception('failed to link program for %s' %
self.__class__.__name__)
self._attribute_locations = {
attribute: gl.glGetAttribLocation(self._program_id, attribute)
for attribute in self._ATTRIBUTES
}
self._uniform_locations = {
uniform: gl.glGetUniformLocation(self._program_id, uniform)
for uniform in self._UNIFORMS
}
width, height = self._width, self._height
self._image_width, self._image_height = image_width, image_height = width * 16, height * 6
bitmap_buffer = np.zeros((image_height, image_width), dtype=np.ubyte)
self._char_to_texcoords = {}
for j in range(6):
for i in range(16):
i_char = j * 16 + i
char = chr(32 + i_char)
self._char_to_texcoords[char] = (i / 16.0, j / 6.0)
self._face.load_char(char,
FT_LOAD_RENDER | FT_LOAD_FORCE_AUTOHINT)
glyph = self._face.glyph
bitmap = glyph.bitmap
x = i * width + glyph.bitmap_left
y = j * height + self._max_asc - glyph.bitmap_top
bitmap_buffer[y:y + bitmap.rows,
x:x + bitmap.width].flat = bitmap.buffer
self._texture_id = gl.glGenTextures(1)
gl.glBindTexture(gl.GL_TEXTURE_2D, self._texture_id)
self._sampler_id = gl.glGenSamplers(1)
gl.glSamplerParameteri(self._sampler_id, gl.GL_TEXTURE_MIN_FILTER,
gl.GL_LINEAR)
gl.glSamplerParameteri(self._sampler_id, gl.GL_TEXTURE_MAG_FILTER,
gl.GL_LINEAR)
gl.glSamplerParameteri(self._sampler_id, gl.GL_TEXTURE_WRAP_S,
gl.GL_CLAMP_TO_EDGE)
gl.glSamplerParameteri(self._sampler_id, gl.GL_TEXTURE_WRAP_T,
gl.GL_CLAMP_TO_EDGE)
gl.glBindSampler(self._texture_unit, self._sampler_id)
gl.glPixelStorei(gl.GL_UNPACK_ALIGNMENT, 1)
gl.glTexImage2D(gl.GL_TEXTURE_2D, 0, gl.GL_RED, image_width,
image_height, 0, gl.GL_RED, gl.GL_UNSIGNED_BYTE,
bitmap_buffer)
gl.glGenerateMipmap(gl.GL_TEXTURE_2D)
gl.glBindTexture(gl.GL_TEXTURE_2D, 0)
if gl.glGetError() != gl.GL_NO_ERROR:
raise Exception('failed to create font texture')
self._gl_initialized = True
_logger.debug('%s.init_gl: OK', self.__class__.__name__)
def use(self,
u_view=None,
u_modelview=None,
u_projection=None,
u_modelview_inverse_transpose=None,
u_modelview_inverse=None,
u_model=None,
frame_data=None):
# if Material._current is self:
# return
if not self._initialized:
self.init_gl()
self.technique.use()
if self._on_use:
self._on_use(self, frame_data)
tex_unit = 0
for uniform_name, location in self.technique.uniform_locations.items():
uniform = self.technique.uniforms[uniform_name]
uniform_type = uniform['type']
if uniform_type == gl.GL_SAMPLER_2D:
texture = self.textures[uniform_name]
gl.glActiveTexture(gl.GL_TEXTURE0+tex_unit)
gl.glBindTexture(gl.GL_TEXTURE_2D, texture.texture_id)
gl.glBindSampler(tex_unit, texture.sampler_id)
gl.glUniform1i(location, tex_unit)
tex_unit += 1
elif uniform_type == gl.GL_SAMPLER_CUBE:
texture = self.textures[uniform_name]
gl.glActiveTexture(gl.GL_TEXTURE0+tex_unit)
gl.glBindTexture(gl.GL_TEXTURE_CUBE_MAP, texture.texture_id)
gl.glBindSampler(tex_unit, texture.sampler_id)
gl.glUniform1i(location, tex_unit)
tex_unit += 1
elif uniform_name in self.values:
value = self.values[uniform_name]
if uniform_type == gl.GL_FLOAT:
gl.glUniform1f(location, value)
elif uniform_type == gl.GL_FLOAT_VEC2:
gl.glUniform2f(location, *value)
elif uniform_type == gl.GL_FLOAT_VEC3:
gl.glUniform3f(location, *value)
elif uniform_type == gl.GL_FLOAT_VEC4:
gl.glUniform4f(location, *value)
else:
raise Exception('unhandled uniform type: %d' % uniform_type)
else:
if u_modelview is not None and uniform_name == 'u_modelview':
gl.glUniformMatrix4fv(location, 1, False, u_modelview)
elif u_modelview_inverse is not None and uniform_name == 'u_modelview_inverse':
gl.glUniformMatrix4fv(location, 1, False, u_modelview_inverse)
elif u_model is not None and uniform_name == 'u_model':
gl.glUniformMatrix4fv(location, 1, False, u_model)
elif u_view is not None and uniform_name == 'u_view':
gl.glUniformMatrix4fv(location, 1, False, u_view)
elif u_projection is not None and uniform_name == 'u_projection':
gl.glUniformMatrix4fv(location, 1, False, u_projection)
elif u_modelview_inverse_transpose is not None and uniform_name == 'u_modelview_inverse_transpose':
gl.glUniformMatrix3fv(location, 1, False, u_modelview_inverse_transpose)
if CHECK_GL_ERRORS:
err = gl.glGetError()
if err != gl.GL_NO_ERROR:
raise Exception('error setting material state: %d' % err)
Material._current = self
def init_gl(self):
if self._gl_initialized:
return
import OpenGL.GL as gl
self._texture_unit = 4
vs_id = gl.glCreateShader(gl.GL_VERTEX_SHADER)
gl.glShaderSource(vs_id, self._VERT_SHADER_SRC)
gl.glCompileShader(vs_id)
if not gl.glGetShaderiv(vs_id, gl.GL_COMPILE_STATUS):
raise Exception('failed to compile %s vertex shader:\n%s' %
(self.__class__.__name__, gl.glGetShaderInfoLog(vs_id).decode()))
fs_id = gl.glCreateShader(gl.GL_FRAGMENT_SHADER)
gl.glShaderSource(fs_id, self._FRAG_SHADER_SRC)
gl.glCompileShader(fs_id)
if not gl.glGetShaderiv(fs_id, gl.GL_COMPILE_STATUS):
raise Exception('failed to compile %s fragment shader:\n%s' %
(self.__class__.__name__, gl.glGetShaderInfoLog(fs_id).decode()))
self._program_id = gl.glCreateProgram()
gl.glAttachShader(self._program_id, vs_id)
gl.glAttachShader(self._program_id, fs_id)
gl.glLinkProgram(self._program_id)
gl.glDetachShader(self._program_id, vs_id)
gl.glDetachShader(self._program_id, fs_id)
if not gl.glGetProgramiv(self._program_id, gl.GL_LINK_STATUS):
raise Exception('failed to link program for %s' % self.__class__.__name__)
self._attribute_locations = {attribute: gl.glGetAttribLocation(self._program_id, attribute)
for attribute in self._ATTRIBUTES}
self._uniform_locations = {uniform: gl.glGetUniformLocation(self._program_id, uniform)
for uniform in self._UNIFORMS}
width, height = self._width, self._height
self._image_width, self._image_height = image_width, image_height = width * 16, height * 6
bitmap_buffer = np.zeros((image_height, image_width), dtype=np.ubyte)
self._char_to_texcoords = {}
for j in range(6):
for i in range(16):
i_char = j * 16 + i
char = chr(32 + i_char)
self._char_to_texcoords[char] = (i / 16.0, j / 6.0)
self._face.load_char(char, FT_LOAD_RENDER | FT_LOAD_FORCE_AUTOHINT)
glyph = self._face.glyph
bitmap = glyph.bitmap
x = i*width + glyph.bitmap_left
y = j*height + self._max_asc - glyph.bitmap_top
bitmap_buffer[y:y+bitmap.rows,x:x+bitmap.width].flat = bitmap.buffer
self._texture_id = gl.glGenTextures(1)
gl.glBindTexture(gl.GL_TEXTURE_2D, self._texture_id)
self._sampler_id = gl.glGenSamplers(1)
gl.glSamplerParameteri(self._sampler_id, gl.GL_TEXTURE_MIN_FILTER, gl.GL_LINEAR)
gl.glSamplerParameteri(self._sampler_id, gl.GL_TEXTURE_MAG_FILTER, gl.GL_LINEAR)
gl.glSamplerParameteri(self._sampler_id, gl.GL_TEXTURE_WRAP_S, gl.GL_CLAMP_TO_EDGE)
gl.glSamplerParameteri(self._sampler_id, gl.GL_TEXTURE_WRAP_T, gl.GL_CLAMP_TO_EDGE)
gl.glBindSampler(self._texture_unit, self._sampler_id)
gl.glPixelStorei(gl.GL_UNPACK_ALIGNMENT, 1)
gl.glTexImage2D(gl.GL_TEXTURE_2D, 0,
gl.GL_RED,
image_width, image_height, 0,
gl.GL_RED, gl.GL_UNSIGNED_BYTE,
bitmap_buffer)
gl.glGenerateMipmap(gl.GL_TEXTURE_2D)
gl.glBindTexture(gl.GL_TEXTURE_2D, 0)
if gl.glGetError() != gl.GL_NO_ERROR:
raise Exception('failed to create font texture')
self._gl_initialized = True
_logger.debug('%s.init_gl: OK', self.__class__.__name__)
def release(self, location=0):
GL.glBindSampler(location, 0)
def set_material_state(material_name, gltf):
if set_material_state.current_material == material_name:
return
set_material_state.current_material = material_name
set_material_state.n_tex = 0
material = gltf['materials'][material_name]
set_technique_state(material['technique'], gltf)
technique = gltf['techniques'][material['technique']]
program = gltf['programs'][technique['program']]
textures = gltf.get('textures', {})
samplers = gltf.get('samplers', {})
material_values = material.get('values', {})
for uniform_name, parameter_name in technique['uniforms'].items():
parameter = technique['parameters'][parameter_name]
if 'semantic' in parameter:
continue
value = material_values.get(
parameter_name,
parameter.get(
'value',
_DEFAULT_MATERIAL_VALUES_BY_PARAM_TYPE.get(parameter['type'])))
if value is None:
raise Exception(
'''could not determine a value to use for material "%s", parameter "%s":
%s %s''' % (material_name, parameter_name, parameter['type'],
uniform_name))
if isinstance(value, (tuple, list)):
value = np.array(value, dtype=np.float32)
if uniform_name in program['uniform_locations']:
location = program['uniform_locations'][uniform_name]
else:
location = gl.glGetUniformLocation(program['id'], uniform_name)
program['uniform_locations'][uniform_name] = location
if parameter['type'] == gl.GL_SAMPLER_2D:
texture = textures[value]
gl.glActiveTexture(gl.GL_TEXTURE0 + set_material_state.n_tex)
gl.glBindTexture(texture['target'], texture['id'])
gl.glBindSampler(gl.GL_TEXTURE0 + set_material_state.n_tex,
samplers[texture['sampler']]['id'])
gl.glUniform1i(location, set_material_state.n_tex)
set_material_state.n_tex += 1
elif parameter['type'] == gl.GL_INT:
gl.glUniform1i(location, value)
elif parameter['type'] == gl.GL_FLOAT:
gl.glUniform1f(location, value)
elif parameter['type'] == gl.GL_FLOAT_VEC2:
gl.glUniform2f(location, *value)
elif parameter['type'] == gl.GL_FLOAT_VEC3:
gl.glUniform3f(location, *value)
elif parameter['type'] == gl.GL_FLOAT_VEC4:
gl.glUniform4f(location, *value)
elif parameter['type'] == gl.GL_FLOAT_MAT2:
gl.glUniformMatrix2fv(location, 1, False, value)
elif parameter['type'] == gl.GL_FLOAT_MAT3:
gl.glUniformMatrix3fv(location, 1, False, value)
elif parameter['type'] == gl.GL_FLOAT_MAT4:
gl.glUniformMatrix4fv(location, 1, False, value)
else:
raise Exception('unhandled parameter type: %s' % parameter['type'])
if CHECK_GL_ERRORS:
if gl.glGetError() != gl.GL_NO_ERROR:
raise Exception('error setting material state')