diff -r 000000000000 -r 6474c204b198 gfx/skia/trunk/src/gpu/GrTextureAccess.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/skia/trunk/src/gpu/GrTextureAccess.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,107 @@
+/*
+ * 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() {
+#ifdef SK_DEBUG
+    memcpy(fSwizzle, "void", 5);
+    fSwizzleMask = 0xbeeffeed;
+#endif
+}
+
+GrTextureAccess::GrTextureAccess(GrTexture* texture, const GrTextureParams& params) {
+    this->reset(texture, params);
+}
+
+GrTextureAccess::GrTextureAccess(GrTexture* texture,
+                                 GrTextureParams::FilterMode filterMode,
+                                 SkShader::TileMode 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,
+                                 GrTextureParams::FilterMode filterMode,
+                                 SkShader::TileMode tileXAndY) {
+    this->reset(texture, swizzle, filterMode, tileXAndY);
+}
+
+void GrTextureAccess::reset(GrTexture* texture,
+                            const char* swizzle,
+                            const GrTextureParams& params) {
+    SkASSERT(NULL != texture);
+    SkASSERT(strlen(swizzle) >= 1 && strlen(swizzle) <= 4);
+
+    fParams = params;
+    fTexture.reset(SkRef(texture));
+    this->setSwizzle(swizzle);
+}
+
+void GrTextureAccess::reset(GrTexture* texture,
+                            const char* swizzle,
+                            GrTextureParams::FilterMode filterMode,
+                            SkShader::TileMode tileXAndY) {
+    SkASSERT(NULL != texture);
+    SkASSERT(strlen(swizzle) >= 1 && strlen(swizzle) <= 4);
+
+    fParams.reset(tileXAndY, filterMode);
+    fTexture.reset(SkRef(texture));
+    this->setSwizzle(swizzle);
+}
+
+void GrTextureAccess::reset(GrTexture* texture,
+                            const GrTextureParams& params) {
+    SkASSERT(NULL != texture);
+    fTexture.reset(SkRef(texture));
+    fParams = params;
+    memcpy(fSwizzle, "rgba", 5);
+    fSwizzleMask = kRGBA_GrColorComponentFlags;
+}
+
+void GrTextureAccess::reset(GrTexture* texture,
+                            GrTextureParams::FilterMode filterMode,
+                            SkShader::TileMode tileXAndY) {
+    SkASSERT(NULL != texture);
+    fTexture.reset(SkRef(texture));
+    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;
+        }
+    }
+}