migrate skpdiff to tools

tools/skpdiff/SkPMetricUtil_generated.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 // To regenerate SkPMetricUtil_generated.h, simply run ./generate_pmetric_tables.py
 namespace SkPMetricUtil {
 static float gCubeRootTable[] = {
     0.0000000000f,0.0992125657f,0.1250000000f,0.1430892803f,0.1574901312f,0.1696511010f,
@@ skipping 161 matching lines @@
     0.9827780228f,0.9831149368f,0.9834516200f,0.9837880729f,0.9841242958f,0.9844602891f,
     0.9847960532f,0.9851315885f,0.9854668954f,0.9858019743f,0.9861368255f,0.9864714495f,
     0.9868058466f,0.9871400173f,0.9874739618f,0.9878076807f,0.9881411742f,0.9884744427f,
     0.9888074867f,0.9891403065f,0.9894729024f,0.9898052749f,0.9901374244f,0.9904693511f,
     0.9908010556f,0.9911325380f,0.9914637989f,0.9917948386f,0.9921256575f,0.9924562559f,
     0.9927866341f,0.9931167927f,0.9934467318f,0.9937764520f,0.9941059535f,0.9944352367f,
     0.9947643020f,0.9950931497f,0.9954217802f,0.9957501939f,0.9960783911f,0.9964063721f,
     0.9967341374f,0.9970616873f,0.9973890221f,0.9977161421f,0.9980430478f,0.9983697395f,
     0.9986962176f,0.9990224823f,0.9993485340f,0.9996743731f,
 };
-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)];
 }
 
 static float gGammaTable[] = {
     0.0000000000f,0.0000050771f,0.0000233280f,0.0000569218f,0.0001071874f,0.0001751240f,
     0.0002615438f,0.0003671363f,0.0004925038f,0.0006381828f,0.0008046585f,0.0009923743f,
     0.0012017395f,0.0014331346f,0.0016869153f,0.0019634162f,0.0022629532f,0.0025858256f,
     0.0029323183f,0.0033027030f,0.0036972396f,0.0041161771f,0.0045597549f,0.0050282035f,
@@ skipping 30 matching lines @@
     0.6120655999f,0.6186857275f,0.6253447208f,0.6320426176f,0.6387794557f,0.6455552724f,
     0.6523701054f,0.6592239918f,0.6661169688f,0.6730490733f,0.6800203422f,0.6870308122f,
     0.6940805198f,0.7011695015f,0.7082977937f,0.7154654323f,0.7226724536f,0.7299188934f,
     0.7372047874f,0.7445301713f,0.7518950806f,0.7592995507f,0.7667436169f,0.7742273142f,
     0.7817506778f,0.7893137424f,0.7969165429f,0.8045591139f,0.8122414899f,0.8199637053f,
     0.8277257945f,0.8355277915f,0.8433697304f,0.8512516452f,0.8591735697f,0.8671355375f,
     0.8751375824f,0.8831797377f,0.8912620368f,0.8993845130f,0.9075471995f,0.9157501293f,
     0.9239933353f,0.9322768503f,0.9406007070f,0.9489649382f,0.9573695762f,0.9658146535f,
     0.9743002024f,0.9828262551f,0.9913928436f,1.0000000000f,
 };
-float get_gamma(unsigned char value) {
+static float get_gamma(unsigned char value) {
     return gGammaTable[value];
 }
 
 static float gTVITable[] = {
     0.0013803843f,0.0054723435f,0.0090762146f,0.0127002285f,0.0161086814f,0.0201358517f,
     0.0241630221f,0.0281901924f,0.0322173627f,0.0362445331f,0.0402717034f,0.0442988738f,
     0.0483260441f,0.0523532145f,0.0563803848f,0.0604075551f,0.0644347255f,0.0684618958f,
     0.0724890662f,0.0765162365f,0.0805434069f,0.0845705772f,0.0885977476f,0.0926249179f,
     0.0966520882f,0.1006792586f,0.1047064289f,0.1087335993f,0.1127607696f,0.1167879400f,
     0.1208151103f,0.1248422806f,0.1288694510f,0.1328966213f,0.1369237917f,0.1409509620f,
@@ skipping 1652 matching lines @@
     5.5301355513f,5.5306914556f,5.5312473598f,5.5318032641f,5.5323591684f,5.5329150726f,
     5.5334709769f,5.5340268811f,5.5345827854f,5.5351386896f,5.5356945939f,5.5362504982f,
     5.5368064024f,5.5373623067f,5.5379182109f,5.5384741152f,5.5390300194f,5.5395859237f,
     5.5401418280f,5.5406977322f,5.5412536365f,5.5418095407f,5.5423654450f,5.5429213492f,
     5.5434772535f,5.5440331578f,5.5445890620f,5.5451449663f,5.5457008705f,5.5462567748f,
     5.5468126790f,5.5473685833f,5.5479244876f,5.5484803918f,5.5490362961f,5.5495922003f,
     5.5501481046f,5.5507040088f,5.5512599131f,5.5518158174f,5.5523717216f,5.5529276259f,
     5.5534835301f,5.5540394344f,5.5545953386f,5.5551512429f,5.5557071472f,5.5562630514f,
     5.5568189557f,5.5573748599f,5.5579307642f,5.5584866684f,
 };
-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)];
 }
 
 static float gVisualMaskTable[] = {
     1.0000000000f,1.1897247198f,1.6811970813f,2.1839523495f,2.6547752201f,3.0963096336f,
     3.5139692055f,3.9121076634f,4.2939844505f,4.6620559235f,5.0182118232f,5.3639381283f,
     5.7004270140f,6.0286520228f,6.3494205286f,6.6634111728f,6.9712011485f,7.2732864768f,
     7.5700973467f,7.8620099053f,8.1493554541f,8.4324277147f,8.7114886393f,8.9867731060f,
@@ skipping 654 matching lines @@
     329.4895500897f,329.5479680033f,329.6063814791f,329.6647905187f,329.7231951234f,329.7815952948f,
     329.8399910342f,329.8983823432f,329.9567692231f,330.0151516755f,330.0735297018f,330.1319033035f,
     330.1902724820f,330.2486372387f,330.3069975751f,330.3653534927f,330.4237049929f,330.4820520772f,
     330.5403947470f,330.5987330037f,330.6570668488f,330.7153962838f,330.7737213101f,330.8320419291f,
     330.8903581422f,330.9486699510f,331.0069773569f,331.0652803612f,331.1235789655f,331.1818731712f,
     331.2401629797f,331.2984483924f,331.3567294109f,331.4150060364f,331.4732782705f,331.5315461146f,
     331.5898095702f,331.6480686385f,331.7063233212f,331.7645736196f,331.8228195351f,331.8810610693f,
     331.9392982234f,331.9975309989f,332.0557593973f,332.1139834200f,332.1722030684f,332.2304183439f,
     332.2886292480f,332.3468357821f,332.4050379475f,332.4632357458f,
 };
-float get_visual_mask(float value) {
+static float get_visual_mask(float value) {
     SkASSERT(value >= 0.0f);
     SkASSERT(value < 4000.0f);
     return gVisualMaskTable[(int)value];
 }
 }