Remove many unused files from //skia/ext

skia/ext/image_operations.h

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef SKIA_EXT_IMAGE_OPERATIONS_H_
-#define SKIA_EXT_IMAGE_OPERATIONS_H_
-
-#include "third_party/skia/include/core/SkBitmap.h"
-#include "third_party/skia/include/core/SkTypes.h"
-
-struct SkIRect;
-
-namespace skia {
-
-class SK_API ImageOperations {
- public:
-  enum ResizeMethod {
-    //
-    // Quality Methods
-    //
-    // Those enumeration values express a desired quality/speed tradeoff.
-    // They are translated into an algorithm-specific method that depends
-    // on the capabilities (CPU, GPU) of the underlying platform.
-    // It is possible for all three methods to be mapped to the same
-    // algorithm on a given platform.
-
-    // Good quality resizing. Fastest resizing with acceptable visual quality.
-    // This is typically intended for use during interactive layouts
-    // where slower platforms may want to trade image quality for large
-    // increase in resizing performance.
-    //
-    // For example the resizing implementation may devolve to linear
-    // filtering if this enables GPU acceleration to be used.
-    //
-    // Note that the underlying resizing method may be determined
-    // on the fly based on the parameters for a given resize call.
-    // For example an implementation using a GPU-based linear filter
-    // in the common case may still use a higher-quality software-based
-    // filter in cases where using the GPU would actually be slower - due
-    // to too much latency - or impossible - due to image format or size
-    // constraints.
-    RESIZE_GOOD,
-
-    // Medium quality resizing. Close to high quality resizing (better
-    // than linear interpolation) with potentially some quality being
-    // traded-off for additional speed compared to RESIZE_BEST.
-    //
-    // This is intended, for example, for generation of large thumbnails
-    // (hundreds of pixels in each dimension) from large sources, where
-    // a linear filter would produce too many artifacts but where
-    // a RESIZE_HIGH might be too costly time-wise.
-    RESIZE_BETTER,
-
-    // High quality resizing. The algorithm is picked to favor image quality.
-    RESIZE_BEST,
-
-    //
-    // Algorithm-specific enumerations
-    //
-
-    // Box filter. This is a weighted average of all of the pixels touching
-    // the destination pixel. For enlargement, this is nearest neighbor.
-    //
-    // You probably don't want this, it is here for testing since it is easy to
-    // compute. Use RESIZE_LANCZOS3 instead.
-    RESIZE_BOX,
-
-    // 1-cycle Hamming filter. This is tall is the middle and falls off towards
-    // the window edges but without going to 0. This is about 40% faster than
-    // a 2-cycle Lanczos.
-    RESIZE_HAMMING1,
-
-    // 2-cycle Lanczos filter. This is tall in the middle, goes negative on
-    // each side, then returns to zero. Does not provide as good a frequency
-    // response as a 3-cycle Lanczos but is roughly 30% faster.
-    RESIZE_LANCZOS2,
-
-    // 3-cycle Lanczos filter. This is tall in the middle, goes negative on
-    // each side, then oscillates 2 more times. It gives nice sharp edges.
-    RESIZE_LANCZOS3,
-
-    // enum aliases for first and last methods by algorithm or by quality.
-    RESIZE_FIRST_QUALITY_METHOD = RESIZE_GOOD,
-    RESIZE_LAST_QUALITY_METHOD = RESIZE_BEST,
-    RESIZE_FIRST_ALGORITHM_METHOD = RESIZE_BOX,
-    RESIZE_LAST_ALGORITHM_METHOD = RESIZE_LANCZOS3,
-  };
-
-  // Resizes the given source bitmap using the specified resize method, so that
-  // the entire image is (dest_size) big. The dest_subset is the rectangle in
-  // this destination image that should actually be returned.
-  //
-  // The output image will be (dest_subset.width(), dest_subset.height()). This
-  // will save work if you do not need the entire bitmap.
-  //
-  // The destination subset must be smaller than the destination image.
-  static SkBitmap Resize(const SkBitmap& source,
-                         ResizeMethod method,
-                         int dest_width, int dest_height,
-                         const SkIRect& dest_subset,
-                         SkBitmap::Allocator* allocator = NULL);
-
-  // Alternate version for resizing and returning the entire bitmap rather than
-  // a subset.
-  static SkBitmap Resize(const SkBitmap& source,
-                         ResizeMethod method,
-                         int dest_width, int dest_height,
-                         SkBitmap::Allocator* allocator = NULL);
-
- private:
-  ImageOperations();  // Class for scoping only.
-};
-
-}  // namespace skia
-
-#endif  // SKIA_EXT_IMAGE_OPERATIONS_H_