1 /* 2 * Copyright 2011 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #ifndef SkImageEncoder_DEFINED 9 #define SkImageEncoder_DEFINED 10 11 #include "SkBitmap.h" 12 #include "SkData.h" 13 #include "SkEncodedImageFormat.h" 14 #include "SkStream.h" 15 16 /** 17 * Encode SkPixmap in the given binary image format. 18 * 19 * @param dst results are written to this stream. 20 * @param src source pixels. 21 * @param format image format, not all formats are supported. 22 * @param quality range from 0-100, this is supported by jpeg and webp. 23 * higher values correspond to improved visual quality, but less compression. 24 * 25 * @return false iff input is bad or format is unsupported. 26 * 27 * Will always return false if Skia is compiled without image 28 * encoders. 29 * 30 * For SkEncodedImageFormat::kWEBP, if quality is 100, it will use lossless compression. Otherwise 31 * it will use lossy. 32 * 33 * For examples of encoding an image to a file or to a block of memory, 34 * see tools/sk_tool_utils.h. 35 */ 36 SK_API bool SkEncodeImage(SkWStream* dst, const SkPixmap& src, 37 SkEncodedImageFormat format, int quality); 38 39 /** 40 * The following helper function wraps SkEncodeImage(). 41 */ 42 inline bool SkEncodeImage(SkWStream* dst, const SkBitmap& src, SkEncodedImageFormat f, int q) { 43 SkPixmap pixmap; 44 return src.peekPixels(&pixmap) && SkEncodeImage(dst, pixmap, f, q); 45 } 46 47 /** 48 * Encode SkPixmap in the given binary image format. 49 * 50 * @param src source pixels. 51 * @param format image format, not all formats are supported. 52 * @param quality range from 0-100, this is supported by jpeg and webp. 53 * higher values correspond to improved visual quality, but less compression. 54 * 55 * @return encoded data or nullptr if input is bad or format is unsupported. 56 * 57 * Will always return nullptr if Skia is compiled without image 58 * encoders. 59 * 60 * For SkEncodedImageFormat::kWEBP, if quality is 100, it will use lossless compression. Otherwise 61 * it will use lossy. 62 */ 63 SK_API sk_sp<SkData> SkEncodePixmap(const SkPixmap& src, SkEncodedImageFormat format, int quality); 64 65 /** 66 * Helper that extracts the pixmap from the bitmap, and then calls SkEncodePixmap() 67 */ 68 SK_API sk_sp<SkData> SkEncodeBitmap(const SkBitmap& src, SkEncodedImageFormat format, int quality); 69 70 #endif // SkImageEncoder_DEFINED 71
