def calculate_bit_depth_dependencies(self):
"""Calculate a number of parameters dependent on bit depth."""
bit_depth_warning = False
p = self.parameters # shorthand
red_bits = gl.glGetIntegerv( gl.GL_RED_BITS )
green_bits = gl.glGetIntegerv( gl.GL_GREEN_BITS )
blue_bits = gl.glGetIntegerv( gl.GL_BLUE_BITS )
min_bits = min( (red_bits,green_bits,blue_bits) )
if min_bits < p.bit_depth:
logger = logging.getLogger('VisionEgg.Gratings')
logger.warning("Requested bit depth of %d in "
"LuminanceGratingCommon, which is "
"greater than your current OpenGL context "
"supports (%d)."% (p.bit_depth,min_bits))
self.gl_internal_format = gl.GL_LUMINANCE
self.format = gl.GL_LUMINANCE
self.gl_type, self.numpy_dtype, self.max_int_val = _get_type_info( p.bit_depth )
self.cached_bit_depth = p.bit_depth
def calculate_bit_depth_dependencies(self):
"""Calculate a number of parameters dependent on bit depth."""
bit_depth_warning = False
p = self.parameters # shorthand
red_bits = gl.glGetIntegerv(gl.GL_RED_BITS)
green_bits = gl.glGetIntegerv(gl.GL_GREEN_BITS)
blue_bits = gl.glGetIntegerv(gl.GL_BLUE_BITS)
min_bits = min((red_bits, green_bits, blue_bits))
if min_bits < p.bit_depth:
logger = logging.getLogger("VisionEgg.Gratings")
logger.warning(
"Requested bit depth of %d in "
"LuminanceGratingCommon, which is "
"greater than your current OpenGL context "
"supports (%d)." % (p.bit_depth, min_bits)
)
self.gl_internal_format = gl.GL_LUMINANCE
self.format = gl.GL_LUMINANCE
self.gl_type, self.numpy_dtype, self.max_int_val = _get_type_info(p.bit_depth)
self.cached_bit_depth = p.bit_depth
def calculate_bit_depth_dependencies(self):
"""Calculate a number of parameters dependent on bit depth."""
p = self.parameters # shorthand
alpha_bit_depth = gl.glGetIntegerv( gl.GL_ALPHA_BITS )
if alpha_bit_depth < p.bit_depth:
logger = logging.getLogger('VisionEgg.Gratings')
logger.warning("Requested bit depth of %d, which is "
"greater than your current OpenGL context "
"supports (%d)."% (p.bit_depth,min_bits))
self.gl_internal_format = gl.GL_ALPHA
self.format = gl.GL_ALPHA
self.gl_type, self.numpy_dtype, self.max_int_val = _get_type_info( p.bit_depth )
self.cached_bit_depth = p.bit_depth
def calculate_bit_depth_dependencies(self):
"""Calculate a number of parameters dependent on bit depth."""
p = self.parameters # shorthand
alpha_bit_depth = gl.glGetIntegerv(gl.GL_ALPHA_BITS)
if alpha_bit_depth < p.bit_depth:
logger = logging.getLogger("VisionEgg.Gratings")
logger.warning(
"Requested bit depth of %d, which is "
"greater than your current OpenGL context "
"supports (%d)." % (p.bit_depth, min_bits)
)
self.gl_internal_format = gl.GL_ALPHA
self.format = gl.GL_ALPHA
self.gl_type, self.numpy_dtype, self.max_int_val = _get_type_info(p.bit_depth)
self.cached_bit_depth = p.bit_depth
def __init__(self,**kw):
LuminanceGratingCommon.__init__(self,**kw)
p = self.parameters # shorthand
self._texture_object_id = gl.glGenTextures(1)
if p.mask:
gl.glActiveTextureARB(gl.GL_TEXTURE0_ARB)
gl.glBindTexture(gl.GL_TEXTURE_1D,self._texture_object_id)
# Do error-checking on texture to make sure it will load
max_dim = gl.glGetIntegerv(gl.GL_MAX_TEXTURE_SIZE)
if p.num_samples > max_dim:
raise NumSamplesTooLargeError("Grating num_samples too large for video system.\nOpenGL reports maximum size of %d"%(max_dim,))
self.calculate_bit_depth_dependencies()
w = p.size[0]
inc = w/float(p.num_samples)
phase = 0.0 # this data won't get used - don't care about phase
self._last_phase = phase
floating_point_sin = numpy.sin(2.0*math.pi*p.spatial_freq*numpy.arange(0.0,w,inc,dtype=numpy.float)+(phase/180.0*math.pi))*0.5*p.contrast+p.pedestal
floating_point_sin = numpy.clip(floating_point_sin,0.0,1.0) # allow square wave generation if contrast > 1
texel_data = (floating_point_sin*self.max_int_val).astype(self.numpy_dtype).tostring()
# Because the MAX_TEXTURE_SIZE method is insensitive to the current
# state of the video system, another check must be done using
# "proxy textures".
gl.glTexImage1D(gl.GL_PROXY_TEXTURE_1D, # target
0, # level
self.gl_internal_format, # video RAM internal format
p.num_samples, # width
0, # border
self.format, # format of texel data
self.gl_type, # type of texel data
texel_data) # texel data (irrelevant for proxy)
if gl.glGetTexLevelParameteriv(gl.GL_PROXY_TEXTURE_1D, # Need PyOpenGL >= 2.0
0,
gl.GL_TEXTURE_WIDTH) == 0:
raise NumSamplesTooLargeError("Grating num_samples is too wide for your video system!")
# If we got here, it worked and we can load the texture for real.
gl.glTexImage1D(gl.GL_TEXTURE_1D, # target
0, # level
self.gl_internal_format, # video RAM internal format
p.num_samples, # width
0, # border
self.format, # format of texel data
self.gl_type, # type of texel data
texel_data) # texel data
# Set texture object defaults
gl.glTexParameteri(gl.GL_TEXTURE_1D,gl.GL_TEXTURE_WRAP_S,gl.GL_CLAMP_TO_EDGE)
gl.glTexParameteri(gl.GL_TEXTURE_1D,gl.GL_TEXTURE_WRAP_T,gl.GL_CLAMP_TO_EDGE)
gl.glTexParameteri(gl.GL_TEXTURE_1D,gl.GL_TEXTURE_MAG_FILTER,gl.GL_LINEAR)
gl.glTexParameteri(gl.GL_TEXTURE_1D,gl.GL_TEXTURE_MIN_FILTER,gl.GL_LINEAR)
if p.color2 is not None:
if VisionEgg.Core.gl_renderer == 'ATi Rage 128 Pro OpenGL Engine' and VisionEgg.Core.gl_version == '1.1 ATI-1.2.22':
logger = logging.getLogger('VisionEgg.Gratings')
logger.warning("Your video card and driver have known "
"bugs which prevent them from rendering "
"color gratings properly.")
def __init__(self, **kw):
LuminanceGratingCommon.__init__(self, **kw)
p = self.parameters # shorthand
self._texture_object_id = gl.glGenTextures(1)
if p.mask:
gl.glActiveTextureARB(gl.GL_TEXTURE0_ARB)
gl.glBindTexture(gl.GL_TEXTURE_1D, self._texture_object_id)
# Do error-checking on texture to make sure it will load
max_dim = gl.glGetIntegerv(gl.GL_MAX_TEXTURE_SIZE)
if p.num_samples > max_dim:
raise NumSamplesTooLargeError(
"Grating num_samples too large for video system.\nOpenGL reports maximum size of %d" % (max_dim,)
)
self.calculate_bit_depth_dependencies()
w = p.size[0]
inc = w / float(p.num_samples)
phase = 0.0 # this data won't get used - don't care about phase
self._last_phase = phase
floating_point_sin = (
numpy.sin(
2.0 * math.pi * p.spatial_freq * numpy.arange(0.0, w, inc, dtype=numpy.float)
+ (phase / 180.0 * math.pi)
)
* 0.5
* p.contrast
+ p.pedestal
)
floating_point_sin = numpy.clip(floating_point_sin, 0.0, 1.0) # allow square wave generation if contrast > 1
texel_data = (floating_point_sin * self.max_int_val).astype(self.numpy_dtype).tostring()
# Because the MAX_TEXTURE_SIZE method is insensitive to the current
# state of the video system, another check must be done using
# "proxy textures".
gl.glTexImage1D(
gl.GL_PROXY_TEXTURE_1D, # target
0, # level
self.gl_internal_format, # video RAM internal format
p.num_samples, # width
0, # border
self.format, # format of texel data
self.gl_type, # type of texel data
texel_data,
) # texel data (irrelevant for proxy)
if gl.glGetTexLevelParameteriv(gl.GL_PROXY_TEXTURE_1D, 0, gl.GL_TEXTURE_WIDTH) == 0: # Need PyOpenGL >= 2.0
raise NumSamplesTooLargeError("Grating num_samples is too wide for your video system!")
# If we got here, it worked and we can load the texture for real.
gl.glTexImage1D(
gl.GL_TEXTURE_1D, # target
0, # level
self.gl_internal_format, # video RAM internal format
p.num_samples, # width
0, # border
self.format, # format of texel data
self.gl_type, # type of texel data
texel_data,
) # texel data
# Set texture object defaults
gl.glTexParameteri(gl.GL_TEXTURE_1D, gl.GL_TEXTURE_WRAP_S, gl.GL_CLAMP_TO_EDGE)
gl.glTexParameteri(gl.GL_TEXTURE_1D, gl.GL_TEXTURE_WRAP_T, gl.GL_CLAMP_TO_EDGE)
gl.glTexParameteri(gl.GL_TEXTURE_1D, gl.GL_TEXTURE_MAG_FILTER, gl.GL_LINEAR)
gl.glTexParameteri(gl.GL_TEXTURE_1D, gl.GL_TEXTURE_MIN_FILTER, gl.GL_LINEAR)
if p.color2 is not None:
if (
VisionEgg.Core.gl_renderer == "ATi Rage 128 Pro OpenGL Engine"
and VisionEgg.Core.gl_version == "1.1 ATI-1.2.22"
):
logger = logging.getLogger("VisionEgg.Gratings")
logger.warning(
"Your video card and driver have known "
"bugs which prevent them from rendering "
"color gratings properly."
)
