msarett | 95f192d | 2015-02-13 09:05:41 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2015 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 | #include "DecodingSubsetBench.h" |
| 9 | #include "SkData.h" |
| 10 | #include "SkImageDecoder.h" |
| 11 | #include "SkOSFile.h" |
| 12 | #include "SkStream.h" |
| 13 | |
| 14 | /* |
| 15 | * |
| 16 | * This benchmark is designed to test the performance of image subset decoding. |
| 17 | * It is invoked from the nanobench.cpp file. |
| 18 | * |
| 19 | */ |
| 20 | DecodingSubsetBench::DecodingSubsetBench(SkString path, SkColorType colorType, |
| 21 | const int divisor) |
| 22 | : fColorType(colorType) |
| 23 | , fDivisor(divisor) |
| 24 | { |
| 25 | // Parse filename and the color type to give the benchmark a useful name |
| 26 | SkString baseName = SkOSPath::Basename(path.c_str()); |
| 27 | const char* colorName; |
| 28 | switch(colorType) { |
| 29 | case kN32_SkColorType: |
| 30 | colorName = "N32"; |
| 31 | break; |
| 32 | case kRGB_565_SkColorType: |
| 33 | colorName = "565"; |
| 34 | break; |
| 35 | case kAlpha_8_SkColorType: |
| 36 | colorName = "Alpha8"; |
| 37 | break; |
| 38 | default: |
| 39 | colorName = "Unknown"; |
| 40 | } |
| 41 | fName.printf("DecodeSubset_%dx%d_%s_%s", fDivisor, fDivisor, |
| 42 | baseName.c_str(), colorName); |
| 43 | |
| 44 | // Perform the decode setup |
| 45 | SkAutoTUnref<SkData> encoded(SkData::NewFromFileName(path.c_str())); |
| 46 | fStream.reset(new SkMemoryStream(encoded)); |
| 47 | fDecoder.reset(SkImageDecoder::Factory(fStream)); |
| 48 | } |
| 49 | |
| 50 | const char* DecodingSubsetBench::onGetName() { |
| 51 | return fName.c_str(); |
| 52 | } |
| 53 | |
| 54 | bool DecodingSubsetBench::isSuitableFor(Backend backend) { |
| 55 | return kNonRendering_Backend == backend; |
| 56 | } |
| 57 | |
| 58 | void DecodingSubsetBench::onDraw(const int n, SkCanvas* canvas) { |
| 59 | for (int i = 0; i < n; i++) { |
| 60 | int w, h; |
| 61 | fDecoder->buildTileIndex(fStream->duplicate(), &w, &h); |
| 62 | // Divide the image into subsets and decode each subset |
| 63 | const int sW = w / fDivisor; |
| 64 | const int sH = h / fDivisor; |
| 65 | for (int y = 0; y < h; y += sH) { |
| 66 | for (int x = 0; x < w; x += sW) { |
| 67 | SkBitmap bitmap; |
| 68 | SkIRect rect = SkIRect::MakeXYWH(x, y, sW, sH); |
| 69 | fDecoder->decodeSubset(&bitmap, rect, fColorType); |
| 70 | } |
| 71 | } |
| 72 | } |
| 73 | } |