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 * Note that webp encodes will use webp lossy compression. 31 * 32 * For examples of encoding an image to a file or to a block of memory, 33 * see tools/sk_tool_utils.h. 34 */ 35 SK_API bool SkEncodeImage(SkWStream* dst, const SkPixmap& src, 36 SkEncodedImageFormat format, int quality); 37 38 /** 39 * The following helper function wraps SkEncodeImage(). 40 */ 41 inline bool SkEncodeImage(SkWStream* dst, const SkBitmap& src, SkEncodedImageFormat f, int q) { 42 SkPixmap pixmap; 43 return src.peekPixels(&pixmap) && SkEncodeImage(dst, pixmap, f, q); 44 } 45 46 /** 47 * Encode SkPixmap in the given binary image format. 48 * 49 * @param src source pixels. 50 * @param format image format, not all formats are supported. 51 * @param quality range from 0-100, this is supported by jpeg and webp. 52 * higher values correspond to improved visual quality, but less compression. 53 * 54 * @return encoded data or nullptr if input is bad or format is unsupported. 55 * 56 * Will always return nullptr if Skia is compiled without image 57 * encoders. 58 * 59 * Note that webp encodes will use webp lossy compression. 60 */ 61 SK_API sk_sp<SkData> SkEncodePixmap(const SkPixmap& src, SkEncodedImageFormat format, int quality); 62 63 /** 64 * Helper that extracts the pixmap from the bitmap, and then calls SkEncodePixmap() 65 */ 66 SK_API sk_sp<SkData> SkEncodeBitmap(const SkBitmap& src, SkEncodedImageFormat format, int quality); 67 68 #endif // SkImageEncoder_DEFINED 69
