make the filter mode for GrTextureAccess an enum so we can plumb down

src/gpu/GrTextureAccess.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrTextureAccess.h"
 #include "GrColor.h"
 #include "GrTexture.h"
 
 GrTextureAccess::GrTextureAccess() {
 #if GR_DEBUG
     memcpy(fSwizzle, "void", 5);
     fSwizzleMask = 0xbeeffeed;
 #endif
 }
 
 GrTextureAccess::GrTextureAccess(GrTexture* texture, const GrTextureParams& params) {
     this->reset(texture, params);
 }
 
 GrTextureAccess::GrTextureAccess(GrTexture* texture,
-                                 bool bilerp,
+                                 GrTextureParams::FilterMode filterMode,
                                  SkShader::TileMode tileXAndY) {
-    this->reset(texture, bilerp, tileXAndY);
+    this->reset(texture, filterMode, tileXAndY);
 }
 
 GrTextureAccess::GrTextureAccess(GrTexture* texture,
                                  const char* swizzle,
                                  const GrTextureParams& params) {
     this->reset(texture, swizzle, params);
 }
 
 GrTextureAccess::GrTextureAccess(GrTexture* texture,
                                  const char* swizzle,
-                                 bool bilerp,
+                                 GrTextureParams::FilterMode filterMode,
                                  SkShader::TileMode tileXAndY) {
-    this->reset(texture, swizzle, bilerp, tileXAndY);
+    this->reset(texture, swizzle, filterMode, tileXAndY);
 }
 
 void GrTextureAccess::reset(GrTexture* texture,
                             const char* swizzle,
                             const GrTextureParams& params) {
     GrAssert(NULL != texture);
     GrAssert(strlen(swizzle) >= 1 && strlen(swizzle) <= 4);
 
     fParams = params;
     fTexture.reset(SkRef(texture));
     this->setSwizzle(swizzle);
 }
 
 void GrTextureAccess::reset(GrTexture* texture,
                             const char* swizzle,
-                            bool bilerp,
+                            GrTextureParams::FilterMode filterMode,
                             SkShader::TileMode tileXAndY) {
     GrAssert(NULL != texture);
     GrAssert(strlen(swizzle) >= 1 && strlen(swizzle) <= 4);
 
-    fParams.reset(tileXAndY, bilerp);
+    fParams.reset(tileXAndY, filterMode);
     fTexture.reset(SkRef(texture));
     this->setSwizzle(swizzle);
 }
 
 void GrTextureAccess::reset(GrTexture* texture,
                             const GrTextureParams& params) {
     GrAssert(NULL != texture);
     fTexture.reset(SkRef(texture));
     fParams = params;
     memcpy(fSwizzle, "rgba", 5);
     fSwizzleMask = kRGBA_GrColorComponentFlags;
 }
 
 void GrTextureAccess::reset(GrTexture* texture,
-                            bool bilerp,
+                            GrTextureParams::FilterMode filterMode,
                             SkShader::TileMode tileXAndY) {
     GrAssert(NULL != texture);
     fTexture.reset(SkRef(texture));
-    fParams.reset(tileXAndY, bilerp);
+    fParams.reset(tileXAndY, filterMode);
     memcpy(fSwizzle, "rgba", 5);
     fSwizzleMask = kRGBA_GrColorComponentFlags;
 }
 
 void GrTextureAccess::setSwizzle(const char* swizzle) {
     fSwizzleMask = 0;
     memset(fSwizzle, '\0', 5);
     for (int i = 0; i < 4 && '\0' != swizzle[i]; ++i) {
         fSwizzle[i] = swizzle[i];
         switch (swizzle[i]) {
             case 'r':
                 fSwizzleMask |= kR_GrColorComponentFlag;
                 break;
             case 'g':
                 fSwizzleMask |= kG_GrColorComponentFlag;
                 break;
             case 'b':
                 fSwizzleMask |= kB_GrColorComponentFlag;
                 break;
             case 'a':
                 fSwizzleMask |= kA_GrColorComponentFlag;
                 break;
             default:
                 GrCrash("Unexpected swizzle string character.");
                 break;
         }
     }
 }