SRGB read and write pixels working and unit test

src/gpu/gl/GrGLCaps.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef GrGLCaps_DEFINED
 #define GrGLCaps_DEFINED
 
 #include "GrCaps.h"
 #include "glsl/GrGLSL.h"
 #include "GrGLStencilAttachment.h"
 #include "SkChecksum.h"
 #include "SkTHash.h"
 #include "SkTArray.h"
 
 class GrGLContextInfo;
 class GrGLSLCaps;
 
 /**
  * Stores some capabilities of a GL context. Most are determined by the GL
  * version and the extensions string. It also tracks formats that have passed
  * the FBO completeness test.
  */
 class GrGLCaps : public GrCaps {
 public:
-    
-
     typedef GrGLStencilAttachment::Format StencilFormat;
 
     /**
      * The type of MSAA for FBOs supported. Different extensions have different
      * semantics of how / when a resolve is performed.
      */
     enum MSFBOType {
         /**
          * no support for MSAA FBOs
          */
@@ skipping 206 matching lines @@
     }
 
     /// Does ReadPixels support the provided format/type combo?
     bool readPixelsSupported(const GrGLInterface* intf,
                              GrGLenum format,
                              GrGLenum type,
                              GrGLenum currFboFormat) const;
 
     bool isCoreProfile() const { return fIsCoreProfile; }
 
-
     bool fullClearIsFree() const { return fFullClearIsFree; }
 
     bool bindFragDataLocationSupport() const { return fBindFragDataLocationSupport; }
 
     /**
+     * Is there support for enabling/disabling sRGB writes for sRGB-capable color attachments?
+     * If false this does not mean sRGB is not supported but rather that if it is supported
+     * it cannot be turned off for configs that support it.
+     */
+    bool srgbWriteControl() const { return fSRGBWriteControl; }
+
+    /**
      * Returns a string containing the caps info.
      */
     SkString dump() const override;
 
     /**
      * LATC can appear under one of three possible names. In order to know
      * which GL internal format to use, we need to keep track of which name
      * we found LATC under. The default is LATC.
      */
     enum LATCAlias {
@@ skipping 44 matching lines @@
             int u32Idx = config / 32;
             int bitIdx = config % 32;
             return SkToBool(fVerifiedColorConfigs[u32Idx] & (1 << bitIdx));
         }
     };
 
     void initFSAASupport(const GrGLContextInfo&, const GrGLInterface*);
     void initBlendEqationSupport(const GrGLContextInfo&);
     void initStencilFormats(const GrGLContextInfo&);
     // This must be called after initFSAASupport().
-    void initConfigRenderableTable(const GrGLContextInfo&);
-    void initConfigTexturableTable(const GrGLContextInfo&, const GrGLInterface*);
+    void initConfigRenderableTable(const GrGLContextInfo&, bool srgbSupport);
+    void initConfigTexturableTable(const GrGLContextInfo&, const GrGLInterface*, bool srgbSupport);
 
     bool doReadPixelsSupported(const GrGLInterface* intf, GrGLenum format, GrGLenum type) const;
 
     void initShaderPrecisionTable(const GrGLContextInfo& ctxInfo,
                                   const GrGLInterface* intf,
                                   GrGLSLCaps* glslCaps);
 
     // tracks configs that have been verified to pass the FBO completeness when
     // used as a color attachment
     VerifiedColorConfigs fVerifiedColorConfigs;
@@ skipping 29 matching lines @@
     bool fVertexArrayObjectSupport : 1;
     bool fInstancedDrawingSupport : 1;
     bool fDirectStateAccessSupport : 1;
     bool fDebugSupport : 1;
     bool fES2CompatibilitySupport : 1;
     bool fMultisampleDisableSupport : 1;
     bool fUseNonVBOVertexAndIndexDynamicData : 1;
     bool fIsCoreProfile : 1;
     bool fFullClearIsFree : 1;
     bool fBindFragDataLocationSupport : 1;
+    bool fSRGBWriteControl : 1;
 
     struct ReadPixelsSupportedFormat {
         GrGLenum fFormat;
         GrGLenum fType;
         GrGLenum fFboFormat;
 
         bool operator==(const ReadPixelsSupportedFormat& rhs) const {
             return fFormat    == rhs.fFormat
                 && fType      == rhs.fType
                 && fFboFormat == rhs.fFboFormat;
         }
     };
     mutable SkTHashMap<ReadPixelsSupportedFormat, bool> fReadPixelsSupportedCache;
 
     typedef GrCaps INHERITED;
 };
 
 #endif