Add a class representing texture swizzle.

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 "glsl/GrGLSL.h"
 #include "GrCaps.h"
-#include "glsl/GrGLSL.h"
 #include "GrGLStencilAttachment.h"
+#include "GrSwizzle.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
@@ skipping 110 matching lines @@
         } else {
             return SkToBool(fConfigTable[config].fFlags & ConfigInfo::kRenderable_Flag);
         }
     }
 
     /** Returns conversions to various GL format parameters for a GrPixelCfonig. */
     const ConfigFormats& configGLFormats(GrPixelConfig config) const {
         return fConfigTable[config].fFormats;
     }
 
+    /** Returns the mapping between GrPixelConfig components and GL internal format components. */
+    const GrSwizzle& configSwizzle(GrPixelConfig config) const {
+        return fConfigTable[config].fSwizzle;
+    }
+
     /**
     * Gets an array of legal stencil formats. These formats are not guaranteed
     * to be supported by the driver but are legal GLenum names given the GL
     * version and extensions supported.
     */
     const SkTArray<StencilFormat, true>& stencilFormats() const {
         return fStencilFormats;
     }
 
     /**
@@ skipping 145 matching lines @@
 
     bool isCoreProfile() const { return fIsCoreProfile; }
 
     bool bindFragDataLocationSupport() const { return fBindFragDataLocationSupport; }
 
     bool bindUniformLocationSupport() const { return fBindUniformLocationSupport; }
 
     /// Are textures with GL_TEXTURE_EXTERNAL_OES type supported.
     bool externalTextureSupport() const { return fExternalTextureSupport; }
 
+    /// GL_ARB_texture_swizzle
+    bool textureSwizzleSupport() const { return fTextureSwizzleSupport; }
+
     /**
      * 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;
 
     bool rgba8888PixelsOpsAreSlow() const { return fRGBA8888PixelsOpsAreSlow; }
     bool partialFBOReadIsSlow() const { return fPartialFBOReadIsSlow; }
 
     const GrGLSLCaps* glslCaps() const { return reinterpret_cast<GrGLSLCaps*>(fShaderCaps.get()); }
 
 private:
     void init(const GrContextOptions&, const GrGLContextInfo&, const GrGLInterface*);
     void initGLSL(const GrGLContextInfo&);
     bool hasPathRenderingSupport(const GrGLContextInfo&, const GrGLInterface*);
 
     void onApplyOptionsOverrides(const GrContextOptions& options) override;
 
     void initFSAASupport(const GrGLContextInfo&, const GrGLInterface*);
     void initBlendEqationSupport(const GrGLContextInfo&);
     void initStencilFormats(const GrGLContextInfo&);
     // This must be called after initFSAASupport().
-    void initConfigTable(const GrGLContextInfo&, const GrGLInterface* gli);
+    void initConfigTable(const GrGLContextInfo&, const GrGLInterface* gli, GrGLSLCaps* glslCaps);
 
     void initShaderPrecisionTable(const GrGLContextInfo& ctxInfo,
                                   const GrGLInterface* intf,
                                   GrGLSLCaps* glslCaps);
 
-    void initConfigSwizzleTable(const GrGLContextInfo& ctxInfo, GrGLSLCaps* glslCaps);
-
-
     SkTArray<StencilFormat, true> fStencilFormats;
 
     int fMaxFragmentUniformVectors;
     int fMaxVertexAttributes;
     int fMaxFragmentTextureUnits;
 
     MSFBOType           fMSFBOType;
     InvalidateFBType    fInvalidateFBType;
     MapBufferType       fMapBufferType;
     TransferBufferType  fTransferBufferType;
@@ skipping 12 matching lines @@
     bool fES2CompatibilitySupport : 1;
     bool fMultisampleDisableSupport : 1;
     bool fUseNonVBOVertexAndIndexDynamicData : 1;
     bool fIsCoreProfile : 1;
     bool fBindFragDataLocationSupport : 1;
     bool fSRGBWriteControl : 1;
     bool fRGBA8888PixelsOpsAreSlow : 1;
     bool fPartialFBOReadIsSlow : 1;
     bool fBindUniformLocationSupport : 1;
     bool fExternalTextureSupport : 1;
+    bool fTextureSwizzleSupport : 1;
 
     /** Number type of the components (with out considering number of bits.) */
     enum FormatType {
         kNormalizedFixedPoint_FormatType,
         kFloat_FormatType,
     };
 
     struct ReadPixelsFormat {
         ReadPixelsFormat() : fFormat(0), fType(0) {}
         GrGLenum fFormat;
@@ skipping 22 matching lines @@
         // Index fStencilFormats.
         int      fStencilFormatIndex;
 
         enum {
             kVerifiedColorAttachment_Flag = 0x1,
             kTextureable_Flag             = 0x2,
             kRenderable_Flag              = 0x4,
             kRenderableWithMSAA_Flag      = 0x8,
         };
         uint32_t fFlags;
+
+        GrSwizzle fSwizzle;
     };
 
     ConfigInfo fConfigTable[kGrPixelConfigCnt];
 
     typedef GrCaps INHERITED;
 };
 
 #endif