22170b3178
This reverts commit e7f165be2e.
Reason for revert: doesn't compile in google3
Original change's description:
> Treat kWEBP encode with quality=100 as lossless
>
> In SkEncodeImage and friends, treat quality of 100 as a lossless encode
> when using kWEBP. This seems a good fit for the intent - which is
> presumably to save the highest quality image. This also matches
> Chromium's blink::ImageEncoder::ComputeWebpOptions, which treats a
> quality of 1 (on a float scale from 0 to 1) as a lossless encode.
>
> FWIW, Chromium has had this behavior since
> https://codereview.chromium.org/1937433002, in response to
> crbug.com/523098. The goal is to "maintain sharpness to
> match the JPEG encoder behavior (use WEBP lossless encoding)".
>
> Add a test to verify the new behavior. This requires making tests
> depend on libwebp to use WebPGetFeatures, since the Skia API does not
> provide a way to determine whether an encoded webp file was encoded
> lossless-ly or lossily.
>
> Bug: skia:8586
> Change-Id: Ie9e09c2f7414ab701d696c4ad9edf405868a716f
> Reviewed-on: https://skia-review.googlesource.com/c/175823
> Commit-Queue: Leon Scroggins <scroggo@google.com>
> Reviewed-by: Derek Sollenberger <djsollen@google.com>
> Reviewed-by: Mike Reed <reed@google.com>
TBR=djsollen@google.com,scroggo@google.com,reed@google.com
Change-Id: I91680f65a2a5e6f0a13b84e97c9541ebe0606b33
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:8586
Reviewed-on: https://skia-review.googlesource.com/c/176584
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
69 lines
2.2 KiB
C
69 lines
2.2 KiB
C
/*
|
|
* Copyright 2011 Google Inc.
|
|
*
|
|
* Use of this source code is governed by a BSD-style license that can be
|
|
* found in the LICENSE file.
|
|
*/
|
|
|
|
#ifndef SkImageEncoder_DEFINED
|
|
#define SkImageEncoder_DEFINED
|
|
|
|
#include "SkBitmap.h"
|
|
#include "SkData.h"
|
|
#include "SkEncodedImageFormat.h"
|
|
#include "SkStream.h"
|
|
|
|
/**
|
|
* Encode SkPixmap in the given binary image format.
|
|
*
|
|
* @param dst results are written to this stream.
|
|
* @param src source pixels.
|
|
* @param format image format, not all formats are supported.
|
|
* @param quality range from 0-100, this is supported by jpeg and webp.
|
|
* higher values correspond to improved visual quality, but less compression.
|
|
*
|
|
* @return false iff input is bad or format is unsupported.
|
|
*
|
|
* Will always return false if Skia is compiled without image
|
|
* encoders.
|
|
*
|
|
* Note that webp encodes will use webp lossy compression.
|
|
*
|
|
* For examples of encoding an image to a file or to a block of memory,
|
|
* see tools/sk_tool_utils.h.
|
|
*/
|
|
SK_API bool SkEncodeImage(SkWStream* dst, const SkPixmap& src,
|
|
SkEncodedImageFormat format, int quality);
|
|
|
|
/**
|
|
* The following helper function wraps SkEncodeImage().
|
|
*/
|
|
inline bool SkEncodeImage(SkWStream* dst, const SkBitmap& src, SkEncodedImageFormat f, int q) {
|
|
SkPixmap pixmap;
|
|
return src.peekPixels(&pixmap) && SkEncodeImage(dst, pixmap, f, q);
|
|
}
|
|
|
|
/**
|
|
* Encode SkPixmap in the given binary image format.
|
|
*
|
|
* @param src source pixels.
|
|
* @param format image format, not all formats are supported.
|
|
* @param quality range from 0-100, this is supported by jpeg and webp.
|
|
* higher values correspond to improved visual quality, but less compression.
|
|
*
|
|
* @return encoded data or nullptr if input is bad or format is unsupported.
|
|
*
|
|
* Will always return nullptr if Skia is compiled without image
|
|
* encoders.
|
|
*
|
|
* Note that webp encodes will use webp lossy compression.
|
|
*/
|
|
SK_API sk_sp<SkData> SkEncodePixmap(const SkPixmap& src, SkEncodedImageFormat format, int quality);
|
|
|
|
/**
|
|
* Helper that extracts the pixmap from the bitmap, and then calls SkEncodePixmap()
|
|
*/
|
|
SK_API sk_sp<SkData> SkEncodeBitmap(const SkBitmap& src, SkEncodedImageFormat format, int quality);
|
|
|
|
#endif // SkImageEncoder_DEFINED
|