Use all available texture units.

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
@@ skipping 197 matching lines @@
      * 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;
     }
 
     /// The maximum number of fragment uniform vectors (GLES has min. 16).
     int maxFragmentUniformVectors() const { return fMaxFragmentUniformVectors; }
 
-    // maximum number of attribute values per vertex
+    /// maximum number of attribute values per vertex
     int maxVertexAttributes() const { return fMaxVertexAttributes; }
 
+    /// maximum number of texture units accessible in the fragment shader.
+    int maxFragmentTextureUnits() const { return fMaxFragmentTextureUnits; }
+
     /// ES requires an extension to support RGBA8 in RenderBufferStorage
     bool rgba8RenderbufferSupport() const { return fRGBA8RenderbufferSupport; }
 
     /// Is GL_BGRA supported
     bool bgraFormatSupport() const { return fBGRAFormatSupport; }
 
     /**
      * Depending on the ES extensions present the BGRA external format may
      * correspond either a BGRA or RGBA internalFormat. On desktop GL it is
      * RGBA.
@@ skipping 94 matching lines @@
     VerifiedColorConfigs fVerifiedColorConfigs;
 
     SkTArray<StencilFormat, true> fStencilFormats;
     // tracks configs that have been verified to pass the FBO completeness when
     // used as a color attachment when a particular stencil format is used
     // as a stencil attachment.
     SkTArray<VerifiedColorConfigs, true> fStencilVerifiedColorConfigs;
 
     int fMaxFragmentUniformVectors;
     int fMaxVertexAttributes;
+    int fMaxFragmentTextureUnits;
 
     MSFBOType fMSFBOType;
     CoverageAAType fCoverageAAType;
     SkTDArray<MSAACoverageMode> fMSAACoverageModes;
 
     FBFetchType fFBFetchType;
 
     bool fRGBA8RenderbufferSupport : 1;
     bool fBGRAFormatSupport : 1;
     bool fBGRAIsInternalFormat : 1;
@@ skipping 10 matching lines @@
     bool fFragCoordsConventionSupport : 1;
     bool fVertexArrayObjectSupport : 1;
     bool fUseNonVBOVertexAndIndexDynamicData : 1;
     bool fIsCoreProfile : 1;
     bool fDiscardFBSupport : 1;
 
     typedef GrDrawTargetCaps INHERITED;
 };
 
 #endif