#
-# Copyright 2008, 2009 Free Software Foundation, Inc.
+# Copyright 2008, 2009, 2010 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
import numpy
import gltext
import math
+import struct
LEGEND_LEFT_PAD = 7
LEGEND_NUM_BLOCKS = 256
ceil_log2 = lambda x: 2**int(math.ceil(math.log(x)/math.log(2)))
+pack_color = lambda x: struct.unpack('I', struct.pack('BBBB', *x))[0]
+unpack_color = lambda x: struct.unpack('BBBB', struct.pack('I', int(x)))
+
def _get_rbga(red_pts, green_pts, blue_pts, alpha_pts=[(0, 0), (1, 0)]):
"""
Get an array of 256 rgba values where each index maps to a color.
#linear interpolation
if x <= x2: return float(y1 - y2)/(x1 - x2)*(x - x1) + y1
raise Exception
- return [numpy.array(map(
- lambda pw: int(255*_fcn(i/255.0, pw)),
- (red_pts, green_pts, blue_pts, alpha_pts),
- ), numpy.uint8).tostring() for i in range(0, 256)
- ]
+ return numpy.array([pack_color(map(
+ lambda pw: int(255*_fcn(i/255.0, pw)),
+ (red_pts, green_pts, blue_pts, alpha_pts),
+ )) for i in range(0, 256)], numpy.uint32)
COLORS = {
'rgb1': _get_rbga( #http://www.ks.uiuc.edu/Research/vmd/vmd-1.7.1/ug/img47.gif
block_height = float(legend_height)/LEGEND_NUM_BLOCKS
x = self.width - self.padding_right + LEGEND_LEFT_PAD
for i in range(LEGEND_NUM_BLOCKS):
- color = COLORS[self._color_mode][int(255*i/float(LEGEND_NUM_BLOCKS-1))]
- GL.glColor4f(*map(lambda c: ord(c)/255.0, color))
+ color = unpack_color(COLORS[self._color_mode][int(255*i/float(LEGEND_NUM_BLOCKS-1))])
+ GL.glColor4f(*numpy.array(color)/255.0)
y = self.height - (i+1)*block_height - self.padding_bottom
self._draw_rect(x, y, LEGEND_WIDTH, block_height)
#draw rectangle around color scale border
self._pointer = 0
if self._num_lines and self._fft_size:
GL.glBindTexture(GL.GL_TEXTURE_2D, self._waterfall_texture)
- data = numpy.zeros(self._num_lines*self._fft_size*4, numpy.uint8).tostring()
+ data = numpy.zeros(self._num_lines*ceil_log2(self._fft_size)*4, numpy.uint8).tostring()
GL.glTexImage2D(GL.GL_TEXTURE_2D, 0, GL.GL_RGBA, ceil_log2(self._fft_size), self._num_lines, 0, GL.GL_RGBA, GL.GL_UNSIGNED_BYTE, data)
self._resize_texture_flag = False
samples = numpy.clip(samples, 0, 255) #clip
samples = numpy.array(samples, numpy.uint8)
#convert the samples to RGBA data
- data = numpy.choose(samples, COLORS[self._color_mode]).tostring()
+ data = COLORS[self._color_mode][samples].tostring()
self._buffer.append(data)
self._waterfall_cache.changed(True)
self.unlock()