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experimental/skpdiff/generate_pmetric_tables.py

 #!/usr/bin/python
 # -*- coding: utf-8 -*-
 
 from __future__ import print_function
 from math import *
 
 
 COPYRIGHT = '''/*
  * Copyright 2013 Google Inc.
  *
@@ skipping 42 matching lines @@
 
 # From Daly 1993
 def visual_mask(contrast):
     x = pow(392.498 * contrast, 0.7)
     x = pow(0.0153 * x, 4.0)
     return pow(1.0 + x, 0.25)
 
 
 # float gCubeRootTable[]
 CUBE_ROOT_ACCESS_FUNCTION = '''
-float get_cube_root(float value) {
+static float get_cube_root(float value) {
     SkASSERT(value >= 0.0f);
     SkASSERT(value * 1023.0f < 1024.0f);
     return gCubeRootTable[(int)(value * 1023.0f)];
 }
 '''
 def generate_cube_root_table(stream):
     print('static float gCubeRootTable[] = {', end='', file=stream)
     for i in range(1024):
         if i % 6 == 0:
             print('\n    ', end='', file=stream)
         print("%.10f" % pow(i / 1024.0, 1.0 / 3.0), end='f,', file=stream)
     print('\n};', end='', file=stream)
     print(CUBE_ROOT_ACCESS_FUNCTION, file=stream)
 
 
 # float gGammaTable[]
 GAMMA_ACCESS_FUNCTION = '''
-float get_gamma(unsigned char value) {
+static float get_gamma(unsigned char value) {
     return gGammaTable[value];
 }
 '''
 def generate_gamma_table(stream):
     print('static float gGammaTable[] = {', end='', file=stream)
     for i in range(256):
         if i % 6 == 0:
             print('\n    ', end='', file=stream)
         print("%.10f" % pow(i / 255.0, 2.2), end='f,', file=stream)
     print('\n};', end='', file=stream)
     print(GAMMA_ACCESS_FUNCTION, file=stream)
 
 
 # float gTVITable[]
 TVI_ACCESS_FUNCTION = '''
-float get_threshold_vs_intensity(float value) {
+static float get_threshold_vs_intensity(float value) {
     SkASSERT(value >= 0.0f);
     SkASSERT(value < 100.0f);
     return gTVITable[(int)(value * 100.0f)];
 }
 '''
 def generate_tvi_table(stream):
     print('static float gTVITable[] = {', end='', file=stream)
     for i in range(10000):
         if i % 6 == 0:
             print('\n    ', end='', file=stream)
         print("%.10f" % threshold_vs_intensity(i / 100.0), end='f,', file=stream)
     print('\n};', end='', file=stream)
     print(TVI_ACCESS_FUNCTION, file=stream)
 
 
 # float gVisualMaskTable[]
 VISUAL_MASK_DOMAIN = 4000
 VISUAL_MASK_ACCESS_FUNCTION = '''
-float get_visual_mask(float value) {{
+static float get_visual_mask(float value) {{
     SkASSERT(value >= 0.0f);
     SkASSERT(value < {}.0f);
     return gVisualMaskTable[(int)value];
 }}'''
 def generate_visual_mask_table(stream):
     print('static float gVisualMaskTable[] = {', end='', file=stream)
     for i in range(VISUAL_MASK_DOMAIN):
         if i % 6 == 0:
             print('\n    ', end='', file=stream)
         print("%.10f" % visual_mask(i), end='f,', file=stream)
@@ skipping 13 matching lines @@
 
 
 def main():
     pmetric_util_out = open('SkPMetricUtil_generated.h', 'wb')
     generate_lookup_tables(pmetric_util_out)
     pmetric_util_out.close()
 
 
 if __name__ == '__main__':
     main()