Index: skia/ext/image_operations.h |
diff --git a/skia/ext/image_operations.h b/skia/ext/image_operations.h |
deleted file mode 100644 |
index 9e0b073cc2fb5355c918093ca5f0eaa47b0840f6..0000000000000000000000000000000000000000 |
--- a/skia/ext/image_operations.h |
+++ /dev/null |
@@ -1,116 +0,0 @@ |
-// 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_ |