Begin instanced rendering for simple shapes

src/gpu/gl/GrGLGpu.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrGLGpu_DEFINED
 #define GrGLGpu_DEFINED
 
@@ skipping 10 matching lines @@
 #include "GrTypes.h"
 #include "GrXferProcessor.h"
 #include "SkTArray.h"
 #include "SkTypes.h"
 
 class GrGLBuffer;
 class GrPipeline;
 class GrNonInstancedMesh;
 class GrSwizzle;
 
+namespace gr_instanced { class GLInstancedRendering; }
+
 #ifdef SK_DEBUG
 #define PROGRAM_CACHE_STATS
 #endif
 
 class GrGLGpu final : public GrGpu {
 public:
     static GrGpu* Create(GrBackendContext backendContext, const GrContextOptions& options,
                          GrContext* context);
     ~GrGLGpu() override;
 
     void disconnect(DisconnectType) override;
 
     const GrGLContext& glContext() const { return *fGLContext; }
 
     const GrGLInterface* glInterface() const { return fGLContext->interface(); }
     const GrGLContextInfo& ctxInfo() const { return *fGLContext; }
     GrGLStandard glStandard() const { return fGLContext->standard(); }
     GrGLVersion glVersion() const { return fGLContext->version(); }
     GrGLSLGeneration glslGeneration() const { return fGLContext->glslGeneration(); }
     const GrGLCaps& glCaps() const { return *fGLContext->caps(); }
 
     GrGLPathRendering* glPathRendering() {
         SkASSERT(glCaps().shaderCaps()->pathRenderingSupport());
         return static_cast<GrGLPathRendering*>(pathRendering());
     }
 
+    gr_instanced::InstancedRendering* createInstancedRenderingIfSupported() override;
+
     // Used by GrGLProgram to configure OpenGL state.
     void bindTexture(int unitIdx, const GrTextureParams& params, bool allowSRGBInputs,
                      GrGLTexture* texture);
 
     void bindTexelBuffer(int unitIdx, GrPixelConfig, GrGLBuffer*);
 
     void generateMipmaps(const GrTextureParams& params, bool allowSRGBInputs, GrGLTexture* texture);
 
     bool onGetReadPixelsInfo(GrSurface* srcSurface, int readWidth, int readHeight, size_t rowBytes,
                              GrPixelConfig readConfig, DrawPreference*,
@@ skipping 523 matching lines @@
         SkAutoTUnref<GrGLBuffer>    fArrayBuffer;
     } fPLSSetupProgram;
 
     bool fHWPLSEnabled;
     bool fPLSHasBeenUsed;
 
     float fHWMinSampleShading;
 
     typedef GrGpu INHERITED;
     friend class GrGLPathRendering; // For accessing setTextureUnit.
+    friend class gr_instanced::GLInstancedRendering; // For accessing flushGLState.
 };
 
 #endif