| /* |
| * Copyright 2020 Google LLC |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "include/core/SkPixmap.h" |
| #include "include/core/SkStream.h" |
| #include "include/private/base/SkTFitsIn.h" |
| #include "include/private/base/SkTo.h" |
| #include "src/images/SkImageEncoderPriv.h" |
| #include "src/ports/SkNDKConversions.h" |
| |
| bool SkEncodeImageWithNDK(SkWStream* stream, const SkPixmap& pmap, SkEncodedImageFormat format, |
| int quality) { |
| // If any of these values is invalid (e.g. set to zero), the info will be rejected by |
| // AndroidBitmap_compress. |
| AndroidBitmapInfo info { |
| .width = SkTFitsIn<uint32_t>(pmap.width()) ? SkToU32(pmap.width()) : 0, |
| .height = SkTFitsIn<uint32_t>(pmap.height()) ? SkToU32(pmap.height()) : 0, |
| .stride = SkTFitsIn<uint32_t>(pmap.rowBytes()) ? SkToU32(pmap.rowBytes()) : 0, |
| .format = SkNDKConversions::toAndroidBitmapFormat(pmap.colorType()) |
| }; |
| |
| switch (pmap.alphaType()) { |
| case kPremul_SkAlphaType: |
| info.flags = ANDROID_BITMAP_FLAGS_ALPHA_PREMUL; |
| break; |
| case kOpaque_SkAlphaType: |
| info.flags = ANDROID_BITMAP_FLAGS_ALPHA_OPAQUE; |
| break; |
| case kUnpremul_SkAlphaType: |
| info.flags = ANDROID_BITMAP_FLAGS_ALPHA_UNPREMUL; |
| break; |
| default: |
| return false; |
| } |
| |
| AndroidBitmapCompressFormat androidFormat; |
| switch (format) { |
| case SkEncodedImageFormat::kJPEG: |
| androidFormat = ANDROID_BITMAP_COMPRESS_FORMAT_JPEG; |
| break; |
| case SkEncodedImageFormat::kPNG: |
| androidFormat = ANDROID_BITMAP_COMPRESS_FORMAT_PNG; |
| break; |
| case SkEncodedImageFormat::kWEBP: |
| if (quality == 100) { |
| // Mimic the behavior of SkImageEncoder.cpp. In LOSSLESS mode, libwebp |
| // interprets quality as the amount of effort (time) to spend making |
| // the encoded image smaller, while the visual quality remains constant. |
| // This value of 75 (on a scale of 0 - 100, where 100 spends the most |
| // time for the smallest encoding) matches WebPConfigInit. |
| androidFormat = ANDROID_BITMAP_COMPRESS_FORMAT_WEBP_LOSSLESS; |
| quality = 75; |
| } else { |
| androidFormat = ANDROID_BITMAP_COMPRESS_FORMAT_WEBP_LOSSY; |
| } |
| break; |
| default: |
| return false; |
| } |
| |
| auto write_to_stream = [](void* userContext, const void* data, size_t size) { |
| return reinterpret_cast<SkWStream*>(userContext)->write(data, size); |
| }; |
| |
| return ANDROID_BITMAP_RESULT_SUCCESS == AndroidBitmap_compress(&info, |
| SkNDKConversions::toDataSpace(pmap.colorSpace()), pmap.addr(), androidFormat, quality, |
| reinterpret_cast<void*>(stream), write_to_stream); |
| } |