Only use fake gamma with linear devices.

src/gpu/text/GrTextUtils.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 "GrTextUtils.h"
 
 #include "GrAtlasTextBlob.h"
@@ skipping 39 matching lines @@
     if (text == nullptr || byteLength == 0) {
         return;
     }
 
     // Ensure the blob is set for bitmaptext
     blob->setHasBitmap();
 
     GrBatchTextStrike* currStrike = nullptr;
 
     // Get GrFontScaler from cache
-    SkGlyphCache* cache = blob->setupCache(runIndex, props, skPaint, &viewMatrix, false);
+    SkGlyphCache* cache = blob->setupCache(runIndex, props, SkPaint::FakeGamma::On,
+                                           skPaint, &viewMatrix);
     GrFontScaler* fontScaler = GrTextUtils::GetGrFontScaler(cache);
 
     SkFindAndPlaceGlyph::ProcessText(
         skPaint.getTextEncoding(), text, byteLength,
         {x, y}, viewMatrix, skPaint.getTextAlign(),
         cache,
         [&](const SkGlyph& glyph, SkPoint position, SkPoint rounding) {
             position += rounding;
             BmpAppendGlyph(
                 blob, runIndex, fontCache, &currStrike, glyph,
@@ skipping 20 matching lines @@
     if (text == nullptr || byteLength == 0) {
         return;
     }
 
     // Ensure the blob is set for bitmaptext
     blob->setHasBitmap();
 
     GrBatchTextStrike* currStrike = nullptr;
 
     // Get GrFontScaler from cache
-    SkGlyphCache* cache = blob->setupCache(runIndex, props, skPaint, &viewMatrix, false);
+    SkGlyphCache* cache = blob->setupCache(runIndex, props, SkPaint::FakeGamma::On,
+                                           skPaint, &viewMatrix);
     GrFontScaler* fontScaler = GrTextUtils::GetGrFontScaler(cache);
 
     SkFindAndPlaceGlyph::ProcessPosText(
         skPaint.getTextEncoding(), text, byteLength,
         offset, viewMatrix, pos, scalarsPerPosition,
         skPaint.getTextAlign(), cache,
         [&](const SkGlyph& glyph, SkPoint position, SkPoint rounding) {
             position += rounding;
             BmpAppendGlyph(
                 blob, runIndex, fontCache, &currStrike, glyph,
@@ skipping 139 matching lines @@
                              SkScalar x, SkScalar y) {
     SkASSERT(byteLength == 0 || text != nullptr);
 
     // nothing to draw
     if (text == nullptr || byteLength == 0) {
         return;
     }
 
     SkDrawCacheProc glyphCacheProc = skPaint.getDrawCacheProc();
     SkAutoDescriptor desc;
-    skPaint.getScalerContextDescriptor(&desc, props, nullptr, true);
+    skPaint.getScalerContextDescriptor(&desc, props, SkPaint::FakeGamma::Off, nullptr);
     SkGlyphCache* origPaintCache = SkGlyphCache::DetachCache(skPaint.getTypeface(),
                                                              desc.getDesc());
 
     SkTArray<SkScalar> positions;
 
     const char* textPtr = text;
     SkFixed stopX = 0;
     SkFixed stopY = 0;
     SkFixed origin = 0;
     switch (skPaint.getTextAlign()) {
@@ skipping 60 matching lines @@
 
     // Setup distance field paint and text ratio
     SkScalar textRatio;
     SkPaint dfPaint(origPaint);
     GrTextUtils::InitDistanceFieldPaint(blob, &dfPaint, &textRatio, viewMatrix);
     blob->setHasDistanceField();
     blob->setSubRunHasDistanceFields(runIndex, origPaint.isLCDRenderText());
 
     GrBatchTextStrike* currStrike = nullptr;
 
-    SkGlyphCache* cache = blob->setupCache(runIndex, props, dfPaint, nullptr, true);
+    SkGlyphCache* cache = blob->setupCache(runIndex, props, SkPaint::FakeGamma::Off,
+                                           dfPaint, nullptr);
     SkDrawCacheProc glyphCacheProc = dfPaint.getDrawCacheProc();
     GrFontScaler* fontScaler = GrTextUtils::GetGrFontScaler(cache);
 
     const char* stop = text + byteLength;
 
     if (SkPaint::kLeft_Align == dfPaint.getTextAlign()) {
         while (text < stop) {
             const char* lastText = text;
             // the last 2 parameters are ignored
             const SkGlyph& glyph = glyphCacheProc(cache, &text, 0, 0);
@@ skipping 219 matching lines @@
     if (cache->getAuxProcData(glyph_cache_aux_proc, &auxData)) {
         scaler = (GrFontScaler*)auxData;
     }
     if (nullptr == scaler) {
         scaler = new GrFontScaler(cache);
         cache->setAuxProc(glyph_cache_aux_proc, scaler);
     }
 
     return scaler;
 }