def _upload_data(self, data, format, level=0):
""" Upload a texture to the current texture object.
It should have been verified that the texture will fit.
"""
# Determine function and target from texType
D = { #gl.GL_TEXTURE_1D: (gl.glTexImage1D, 1),
gl.GL_TEXTURE_2D: (gl.glTexImage2D, 2),
gl.ext.GL_TEXTURE_3D: (gl.ext.glTexImage3D, 3)
}
uploadFun, ndim = D[self._target]
# Determine type
thetype = data.dtype.name
if not thetype in self.DTYPE2GTYPE: # Note that we convert if necessary in Texture
raise TextureError("Cannot translate datatype %s to GL." % thetype)
gltype = self.DTYPE2GTYPE[thetype]
# Build args list
size, gltype = self._get_size_and_type(data, ndim)
args = [self._target, level, format] + size + [0, format, gltype, data]
# Check the alignment of the texture
alignment = self._get_alignment(data.shape[-1])
if alignment != 4:
gl.glPixelStorei(gl.GL_UNPACK_ALIGNMENT, alignment)
# Call
uploadFun(*tuple(args))
# Check if we need to reset our pixel store state
if alignment != 4:
gl.glPixelStorei(gl.GL_UNPACK_ALIGNMENT, 4)
def _upload_data(self, data, format, level=0):
""" Upload a texture to the current texture object.
It should have been verified that the texture will fit.
"""
# Determine function and target from texType
D = { #gl.GL_TEXTURE_1D: (gl.glTexImage1D, 1),
gl.GL_TEXTURE_2D: (gl.glTexImage2D, 2),
gl.ext.GL_TEXTURE_3D: (gl.ext.glTexImage3D, 3)}
uploadFun, ndim = D[self._target]
# Determine type
thetype = data.dtype.name
if not thetype in self.DTYPE2GTYPE: # Note that we convert if necessary in Texture
raise TextureError("Cannot translate datatype %s to GL." % thetype)
gltype = self.DTYPE2GTYPE[thetype]
# Build args list
size, gltype = self._get_size_and_type(data, ndim)
args = [self._target, level, format] + size + [0, format, gltype, data]
# Check the alignment of the texture
alignment = self._get_alignment(data.shape[-1])
if alignment != 4:
gl.glPixelStorei(gl.GL_UNPACK_ALIGNMENT, alignment)
# Call
uploadFun(*tuple(args))
# Check if we need to reset our pixel store state
if alignment != 4:
gl.glPixelStorei(gl.GL_UNPACK_ALIGNMENT, 4)
def on_initialize(self, event):
gl.glClearColor(1,1,1,1)
gl.glEnable(gl.GL_DEPTH_TEST)
# Create shader program
self._prog_handle = gl.glCreateProgram()
# Create vertex shader
shader = gl.glCreateShader(gl.GL_VERTEX_SHADER)
gl.glShaderSource(shader, VERT_CODE)
gl.glCompileShader(shader)
status = gl.glGetShaderiv(shader, gl.GL_COMPILE_STATUS)
if not status:
# We could show more useful info here, but that takes a few lines
raise RuntimeError('Vertex shader did not compile.')
else:
gl.glAttachShader(self._prog_handle, shader)
# Create fragment shader
shader = gl.glCreateShader(gl.GL_FRAGMENT_SHADER)
gl.glShaderSource(shader, FRAG_CODE)
gl.glCompileShader(shader)
status = gl.glGetShaderiv(shader, gl.GL_COMPILE_STATUS)
if not status:
# We could show more useful info here, but that takes a few lines
raise RuntimeError('Fragment shader did not compile.')
else:
gl.glAttachShader(self._prog_handle, shader)
# Link
gl.glLinkProgram(self._prog_handle)
status = gl.glGetProgramiv(self._prog_handle, gl.GL_LINK_STATUS)
if not status:
# We could show more useful info here, but that takes a few lines
raise RuntimeError('Program did not link.')
# Create texture
im = io.crate()
self._tex_handle = gl.glGenTextures(1)
gl.glPixelStorei(gl.GL_UNPACK_ALIGNMENT, 1)
gl.glBindTexture(gl.GL_TEXTURE_2D, self._tex_handle)
gl.glTexImage2D(gl.GL_TEXTURE_2D, 0, gl.GL_RGB,
im.shape[1], im.shape[0], 0, gl.GL_RGB, gl.GL_UNSIGNED_BYTE, im)
gl.glTexParameter(gl.GL_TEXTURE_2D, gl.GL_TEXTURE_MIN_FILTER, gl.GL_LINEAR)
gl.glTexParameter(gl.GL_TEXTURE_2D, gl.GL_TEXTURE_MAG_FILTER, gl.GL_LINEAR)
if use_buffers:
# Create vertex buffer
self._positions_handle = gl.glGenBuffers(1)
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, self._positions_handle)
gl.glBufferData(gl.GL_ARRAY_BUFFER, positions.nbytes, positions, gl.GL_DYNAMIC_DRAW)
#
self._texcoords_handle = gl.glGenBuffers(1)
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, self._texcoords_handle)
gl.glBufferData(gl.GL_ARRAY_BUFFER, texcoords.nbytes, texcoords, gl.GL_DYNAMIC_DRAW)
# Create buffer for faces
self._faces_handle = gl.glGenBuffers(1)
gl.glBindBuffer(gl.GL_ELEMENT_ARRAY_BUFFER, self._faces_handle)
gl.glBufferData(gl.GL_ELEMENT_ARRAY_BUFFER, faces.nbytes, faces, gl.GL_DYNAMIC_DRAW)
def on_initialize(self, event):
gl.glClearColor(0, 0, 0, 1)
# Enable blending
gl.glEnable(gl.GL_BLEND)
gl.glBlendFunc(gl.GL_SRC_ALPHA, gl.GL_ONE)
# Note: normal GL requires these lines, ES 2.0 does not
from OpenGL import GL
gl.glEnable(GL.GL_VERTEX_PROGRAM_POINT_SIZE)
gl.glEnable(GL.GL_POINT_SPRITE)
# Create shader program
self._prog_handle = gl.glCreateProgram()
# Create vertex shader
shader = gl.glCreateShader(gl.GL_VERTEX_SHADER)
gl.glShaderSource(shader, VERT_CODE)
gl.glCompileShader(shader)
status = gl.glGetShaderiv(shader, gl.GL_COMPILE_STATUS)
if not status:
# We could show more useful info here, but that takes a few lines
raise RuntimeError('Vertex shader did not compile.')
else:
gl.glAttachShader(self._prog_handle, shader)
# Create fragment shader
shader = gl.glCreateShader(gl.GL_FRAGMENT_SHADER)
gl.glShaderSource(shader, FRAG_CODE)
gl.glCompileShader(shader)
status = gl.glGetShaderiv(shader, gl.GL_COMPILE_STATUS)
if not status:
# We could show more useful info here, but that takes a few lines
raise RuntimeError('Fragment shader did not compile.')
else:
gl.glAttachShader(self._prog_handle, shader)
# Link
gl.glLinkProgram(self._prog_handle)
status = gl.glGetProgramiv(self._prog_handle, gl.GL_LINK_STATUS)
if not status:
# We could show more useful info here, but that takes a few lines
raise RuntimeError('Program did not link.')
# Create texture
self._tex_handle = gl.glGenTextures(1)
gl.glPixelStorei(gl.GL_UNPACK_ALIGNMENT, 1)
gl.glBindTexture(gl.GL_TEXTURE_2D, self._tex_handle)
gl.glTexImage2D(gl.GL_TEXTURE_2D, 0, gl.GL_LUMINANCE, im1.shape[1],
im1.shape[0], 0, gl.GL_LUMINANCE, gl.GL_FLOAT,
im1.astype(np.float32))
gl.glTexParameter(gl.GL_TEXTURE_2D, gl.GL_TEXTURE_MIN_FILTER,
gl.GL_LINEAR)
gl.glTexParameter(gl.GL_TEXTURE_2D, gl.GL_TEXTURE_MAG_FILTER,
gl.GL_LINEAR)
# Create vertex buffer
self._vbo_handle = gl.glGenBuffers(1)
def on_initialize(self, event):
gl.glClearColor(0,0,0,1);
# Enable blending
gl.glEnable(gl.GL_BLEND)
gl.glBlendFunc(gl.GL_SRC_ALPHA, gl.GL_ONE)
# Note: normal GL requires these lines, ES 2.0 does not
from OpenGL import GL
gl.glEnable(GL.GL_VERTEX_PROGRAM_POINT_SIZE)
gl.glEnable(GL.GL_POINT_SPRITE)
# Create shader program
self._prog_handle = gl.glCreateProgram()
# Create vertex shader
shader = gl.glCreateShader(gl.GL_VERTEX_SHADER)
gl.glShaderSource(shader, VERT_CODE)
gl.glCompileShader(shader)
status = gl.glGetShaderiv(shader, gl.GL_COMPILE_STATUS)
if not status:
# We could show more useful info here, but that takes a few lines
raise RuntimeError('Vertex shader did not compile.')
else:
gl.glAttachShader(self._prog_handle, shader)
# Create fragment shader
shader = gl.glCreateShader(gl.GL_FRAGMENT_SHADER)
gl.glShaderSource(shader, FRAG_CODE)
gl.glCompileShader(shader)
status = gl.glGetShaderiv(shader, gl.GL_COMPILE_STATUS)
if not status:
# We could show more useful info here, but that takes a few lines
raise RuntimeError('Fragment shader did not compile.')
else:
gl.glAttachShader(self._prog_handle, shader)
# Link
gl.glLinkProgram(self._prog_handle)
status = gl.glGetProgramiv(self._prog_handle, gl.GL_LINK_STATUS)
if not status:
# We could show more useful info here, but that takes a few lines
raise RuntimeError('Program did not link.')
# Create texture
self._tex_handle = gl.glGenTextures(1)
gl.glPixelStorei(gl.GL_UNPACK_ALIGNMENT, 1)
gl.glBindTexture(gl.GL_TEXTURE_2D, self._tex_handle)
gl.glTexImage2D(gl.GL_TEXTURE_2D, 0, gl.GL_LUMINANCE,
im1.shape[1], im1.shape[0], 0, gl.GL_LUMINANCE, gl.GL_FLOAT,
im1.astype(np.float32))
gl.glTexParameter(gl.GL_TEXTURE_2D, gl.GL_TEXTURE_MIN_FILTER, gl.GL_LINEAR)
gl.glTexParameter(gl.GL_TEXTURE_2D, gl.GL_TEXTURE_MAG_FILTER, gl.GL_LINEAR)
# Create vertex buffer
self._vbo_handle = gl.glGenBuffers(1)
def _screenshot(viewport=None):
""" Take a screenshot using glReadPixels. Not sure where to put this
yet, so a private function for now. Used in make.py.
"""
import numpy as np
from vispy import gl
#gl.glReadBuffer(gl.GL_BACK) Not avaliable in ES 2.0
if viewport is None:
viewport = gl.glGetIntegerv(gl.GL_VIEWPORT)
x,y,w,h = viewport
gl.glPixelStorei(gl.GL_PACK_ALIGNMENT, 1) # PACK, not UNPACK
im = gl.glReadPixels(x, y, w, h, gl.GL_RGB, gl.GL_UNSIGNED_BYTE)
gl.glPixelStorei(gl.GL_PACK_ALIGNMENT, 4)
# reshape, flip, and return
if not isinstance(im, np.ndarray):
im = np.frombuffer(im, np.uint8)
im.shape = h,w,3
im = np.flipud(im)
return im
def _upload_data(self, data, texLevel, offset):
""" Upload a texture to the current texture object.
It should have been verified that the texture will fit.
"""
# Get parameters that we need
target = self._target
format, level = texLevel.format, texLevel.level
alignment = self._get_alignment(data.shape[-1])
# Determine function and target from texType
D = { #gl.GL_TEXTURE_1D: (gl.glTexSubImage1D, 1),
gl.GL_TEXTURE_2D: (gl.glTexSubImage2D, 2),
gl.ext.GL_TEXTURE_3D: (gl.ext.glTexSubImage3D, 3)}
uploadFun, ndim = D[target]
# Reverse and check offset
offset = offset[::-1] #[i for i in offset]
assert len(offset) == ndim
# Determine type
thetype = data.dtype.name
if thetype not in self.DTYPE2GTYPE: # Note that we convert if necessary
raise TextureError("Cannot translate datatype %s to GL." % thetype)
gltype = self.DTYPE2GTYPE[thetype]
# Build args list
size = [i for i in reversed( data.shape[:ndim] )]
args = [target, level] + offset + size + [format, gltype, data]
# Check the alignment of the texture
if alignment != 4:
gl.glPixelStorei(gl.GL_UNPACK_ALIGNMENT, alignment)
# Call
uploadFun(*tuple(args))
# Check if we need to reset our pixel store state
if alignment != 4:
gl.glPixelStorei(gl.GL_UNPACK_ALIGNMENT, 4)
def on_initialize(self, event):
gl.glClearColor(1, 1, 1, 1)
gl.glEnable(gl.GL_DEPTH_TEST)
# Create shader program
self._prog_handle = gl.glCreateProgram()
# Create vertex shader
shader = gl.glCreateShader(gl.GL_VERTEX_SHADER)
gl.glShaderSource(shader, VERT_CODE)
gl.glCompileShader(shader)
status = gl.glGetShaderiv(shader, gl.GL_COMPILE_STATUS)
if not status:
# We could show more useful info here, but that takes a few lines
raise RuntimeError('Vertex shader did not compile.')
else:
gl.glAttachShader(self._prog_handle, shader)
# Create fragment shader
shader = gl.glCreateShader(gl.GL_FRAGMENT_SHADER)
gl.glShaderSource(shader, FRAG_CODE)
gl.glCompileShader(shader)
status = gl.glGetShaderiv(shader, gl.GL_COMPILE_STATUS)
if not status:
# We could show more useful info here, but that takes a few lines
raise RuntimeError('Fragment shader did not compile.')
else:
gl.glAttachShader(self._prog_handle, shader)
# Link
gl.glLinkProgram(self._prog_handle)
status = gl.glGetProgramiv(self._prog_handle, gl.GL_LINK_STATUS)
if not status:
# We could show more useful info here, but that takes a few lines
raise RuntimeError('Program did not link.')
# Create texture
im = io.crate()
self._tex_handle = gl.glGenTextures(1)
gl.glPixelStorei(gl.GL_UNPACK_ALIGNMENT, 1)
gl.glBindTexture(gl.GL_TEXTURE_2D, self._tex_handle)
gl.glTexImage2D(gl.GL_TEXTURE_2D, 0, gl.GL_RGB, im.shape[1],
im.shape[0], 0, gl.GL_RGB, gl.GL_UNSIGNED_BYTE, im)
gl.glTexParameter(gl.GL_TEXTURE_2D, gl.GL_TEXTURE_MIN_FILTER,
gl.GL_LINEAR)
gl.glTexParameter(gl.GL_TEXTURE_2D, gl.GL_TEXTURE_MAG_FILTER,
gl.GL_LINEAR)
if use_buffers:
# Create vertex buffer
self._positions_handle = gl.glGenBuffers(1)
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, self._positions_handle)
gl.glBufferData(gl.GL_ARRAY_BUFFER, positions.nbytes, positions,
gl.GL_DYNAMIC_DRAW)
#
self._texcoords_handle = gl.glGenBuffers(1)
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, self._texcoords_handle)
gl.glBufferData(gl.GL_ARRAY_BUFFER, texcoords.nbytes, texcoords,
gl.GL_DYNAMIC_DRAW)
# Create buffer for faces
self._faces_handle = gl.glGenBuffers(1)
gl.glBindBuffer(gl.GL_ELEMENT_ARRAY_BUFFER, self._faces_handle)
gl.glBufferData(gl.GL_ELEMENT_ARRAY_BUFFER, faces.nbytes, faces,
gl.GL_DYNAMIC_DRAW)
