Remove FX_GAMMA() and friends. They do nothing.

core/fxge/skia/fx_skia_device.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/fxge/include/fx_ge.h"
 
 #if defined(_SKIA_SUPPORT_)
 #include "core/fxcodec/include/fx_codec.h"
 
 #include "core/fpdfapi/fpdf_page/cpdf_shadingpattern.h"
@@ skipping 241 matching lines @@
                                 int dest_top,
                                 int width,
                                 int height,
                                 const CFX_DIBSource* pSrcBitmap,
                                 int src_left,
                                 int src_top) {
   if (!pBitmap)
     return;
   pBitmap->GetOverlapRect(dest_left, dest_top, width, height,
                           pSrcBitmap->GetWidth(), pSrcBitmap->GetHeight(),
-                          src_left, src_top, NULL);
+                          src_left, src_top, nullptr);
   if (width == 0 || height == 0)
     return;
   int Bpp = pBitmap->GetBPP() / 8;
   FXDIB_Format dest_format = pBitmap->GetFormat();
   FXDIB_Format src_format = pSrcBitmap->GetFormat();
   int pitch = pBitmap->GetPitch();
   uint8_t* buffer = pBitmap->GetBuffer();
   if (dest_format == src_format) {
     for (int row = 0; row < height; row++) {
       uint8_t* dest_scan = buffer + (dest_top + row) * pitch + dest_left * Bpp;
@@ skipping 33 matching lines @@
       }
     } else {
       ASSERT(FALSE);
     }
   } else if (dest_format == FXDIB_Argb || dest_format == FXDIB_Rgb32) {
     if (src_format == FXDIB_Rgb) {
       for (int row = 0; row < height; row++) {
         uint8_t* dest_scan = (uint8_t*)(dest_buf + row * pitch);
         uint8_t* src_scan =
             (uint8_t*)pSrcBitmap->GetScanline(src_top + row) + src_left * 3;
-        if (src_format == FXDIB_Argb) {
-          for (int col = 0; col < width; col++) {
-            FXARGB_SETDIB(dest_scan, FXARGB_MAKE(0xff, FX_GAMMA(src_scan[0]),
-                                                 FX_GAMMA(src_scan[1]),
-                                                 FX_GAMMA(src_scan[2])));
-            dest_scan += 4;
-            src_scan += 3;
-          }
-        } else {
-          for (int col = 0; col < width; col++) {
-            FXARGB_SETDIB(dest_scan, FXARGB_MAKE(0xff, src_scan[0], src_scan[1],
-                                                 src_scan[2]));
-            dest_scan += 4;
-            src_scan += 3;
-          }
+        for (int col = 0; col < width; col++) {
+          FXARGB_SETDIB(dest_scan, FXARGB_MAKE(0xff, src_scan[0], src_scan[1],
+                                               src_scan[2]));
+          dest_scan += 4;
+          src_scan += 3;
         }
       }
     } else if (src_format == FXDIB_Rgb32) {
       ASSERT(dest_format == FXDIB_Argb);
       for (int row = 0; row < height; row++) {
         uint8_t* dest_scan = dest_buf + row * pitch;
         uint8_t* src_scan =
             (uint8_t*)(pSrcBitmap->GetScanline(src_top + row) + src_left * 4);
         for (int col = 0; col < width; col++) {
           FXARGB_SETDIB(dest_scan, FXARGB_MAKE(0xff, src_scan[0], src_scan[1],
@@ skipping 796 matching lines @@
   SetDeviceDriver(pDriver);
   return true;
 }
 
 CFX_FxgeDevice::~CFX_FxgeDevice() {
   if (m_bOwnedBitmap && GetBitmap())
     delete GetBitmap();
 }
 
 #endif