sRGB support for distance field text.

src/gpu/batches/GrAtlasTextBatch.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrAtlasTextBatch.h"
 
 #include "GrBatchFlushState.h"
@@ skipping 243 matching lines @@
 // TODO just use class params
 // TODO trying to figure out why lcd is so whack
 GrGeometryProcessor* GrAtlasTextBatch::setupDfProcessor(const SkMatrix& viewMatrix,
                                                         SkColor filteredColor,
                                                         GrColor color, GrTexture* texture) const {
     GrTextureParams params(SkShader::kClamp_TileMode, GrTextureParams::kBilerp_FilterMode);
     bool isLCD = this->isLCD();
     // set up any flags
     uint32_t flags = viewMatrix.isSimilarity() ? kSimilarity_DistanceFieldEffectFlag : 0;
     flags |= viewMatrix.isScaleTranslate() ? kScaleOnly_DistanceFieldEffectFlag : 0;
+    flags |= fUseSRGBDistanceTable ? kSRGB_DistanceFieldEffectFlag : 0;
 
     // see if we need to create a new effect
     if (isLCD) {
         flags |= kUseLCD_DistanceFieldEffectFlag;
         flags |= fUseBGR ? kBGR_DistanceFieldEffectFlag : 0;
 
         GrColor colorNoPreMul = skcolor_to_grcolor_nopremultiply(filteredColor);
 
-        float redCorrection =
-            (*fDistanceAdjustTable)[GrColorUnpackR(colorNoPreMul) >> kDistanceAdjustLumShift];
-        float greenCorrection =
-            (*fDistanceAdjustTable)[GrColorUnpackG(colorNoPreMul) >> kDistanceAdjustLumShift];
-        float blueCorrection =
-            (*fDistanceAdjustTable)[GrColorUnpackB(colorNoPreMul) >> kDistanceAdjustLumShift];
+        float redCorrection = fDistanceAdjustTable->getAdjustment(
+            GrColorUnpackR(colorNoPreMul) >> kDistanceAdjustLumShift, fUseSRGBDistanceTable);
+        float greenCorrection = fDistanceAdjustTable->getAdjustment(
+            GrColorUnpackG(colorNoPreMul) >> kDistanceAdjustLumShift, fUseSRGBDistanceTable);
+        float blueCorrection = fDistanceAdjustTable->getAdjustment(
+            GrColorUnpackB(colorNoPreMul) >> kDistanceAdjustLumShift, fUseSRGBDistanceTable);
         GrDistanceFieldLCDTextGeoProc::DistanceAdjust widthAdjust =
             GrDistanceFieldLCDTextGeoProc::DistanceAdjust::Make(redCorrection,
                                                                 greenCorrection,
                                                                 blueCorrection);
 
         return GrDistanceFieldLCDTextGeoProc::Create(color,
                                                      viewMatrix,
                                                      texture,
                                                      params,
                                                      widthAdjust,
                                                      flags,
                                                      this->usesLocalCoords());
     } else {
 #ifdef SK_GAMMA_APPLY_TO_A8
         U8CPU lum = SkColorSpaceLuminance::computeLuminance(SK_GAMMA_EXPONENT, filteredColor);
-        float correction = (*fDistanceAdjustTable)[lum >> kDistanceAdjustLumShift];
+        float correction = fDistanceAdjustTable->getAdjustment(
+            lum >> kDistanceAdjustLumShift, fUseSRGBDistanceTable);
         return GrDistanceFieldA8TextGeoProc::Create(color,
                                                     viewMatrix,
                                                     texture,
                                                     params,
                                                     correction,
                                                     flags,
                                                     this->usesLocalCoords());
 #else
         return GrDistanceFieldA8TextGeoProc::Create(color,
                                                     viewMatrix,
                                                     texture,
                                                     params,
                                                     flags,
                                                     this->usesLocalCoords());
 #endif
     }
 
 }
 
 void GrBlobRegenHelper::flush() {
     fBatch->flush(fTarget, fFlushInfo);
 }