Leon Scroggins III | 07a722c | 2018-01-16 15:01:17 -0500 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2018 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 "SkAndroidCodec.h" |
| 9 | #include "SkCodec.h" |
| 10 | #include "SkEncodedImageFormat.h" |
| 11 | |
| 12 | #include "Resources.h" |
| 13 | #include "Test.h" |
| 14 | |
| 15 | static SkISize times(const SkISize& size, float factor) { |
| 16 | return { (int) (size.width() * factor), (int) (size.height() * factor) }; |
| 17 | } |
| 18 | |
| 19 | static SkISize plus(const SkISize& size, int term) { |
| 20 | return { size.width() + term, size.height() + term }; |
| 21 | } |
| 22 | |
| 23 | static bool invalid(const SkISize& size) { |
| 24 | return size.width() < 1 || size.height() < 1; |
| 25 | } |
| 26 | |
| 27 | DEF_TEST(AndroidCodec_computeSampleSize, r) { |
| 28 | if (GetResourcePath().isEmpty()) { |
| 29 | return; |
| 30 | } |
| 31 | for (const char* file : { "images/color_wheel.webp", |
| 32 | "images/ship.png", |
| 33 | "images/dog.jpg", |
| 34 | "images/color_wheel.gif", |
| 35 | "images/rle.bmp", |
| 36 | "images/google_chrome.ico", |
| 37 | "images/mandrill.wbmp", |
| 38 | #ifdef SK_CODEC_DECODES_RAW |
| 39 | "images/sample_1mp.dng", |
| 40 | #endif |
| 41 | }) { |
| 42 | auto data = GetResourceAsData(file); |
| 43 | if (!data) { |
| 44 | ERRORF(r, "Could not get %s", file); |
| 45 | continue; |
| 46 | } |
| 47 | |
| 48 | auto codec = SkAndroidCodec::MakeFromCodec(SkCodec::MakeFromData(std::move(data))); |
| 49 | if (!codec) { |
| 50 | ERRORF(r, "Could not create codec for %s", file); |
| 51 | continue; |
| 52 | } |
| 53 | |
| 54 | const auto dims = codec->getInfo().dimensions(); |
| 55 | const SkISize downscales[] = { |
| 56 | plus(dims, -1), |
| 57 | times(dims, .15f), |
| 58 | times(dims, .6f), |
| 59 | { (int32_t) (dims.width() * .25f), (int32_t) (dims.height() * .75f ) }, |
| 60 | { 1, 1 }, |
| 61 | { 1, 2 }, |
| 62 | { 2, 1 }, |
| 63 | { 0, -1 }, |
| 64 | { dims.width(), dims.height() - 1 }, |
| 65 | }; |
| 66 | for (SkISize size : downscales) { |
| 67 | const auto requested = size; |
| 68 | const int computedSampleSize = codec->computeSampleSize(&size); |
| 69 | REPORTER_ASSERT(r, size.width() >= 1 && size.height() >= 1); |
| 70 | if (codec->getEncodedFormat() == SkEncodedImageFormat::kWEBP) { |
| 71 | // WebP supports arbitrary down-scaling. |
| 72 | REPORTER_ASSERT(r, size == requested || invalid(requested)); |
| 73 | } else if (computedSampleSize == 1) { |
| 74 | REPORTER_ASSERT(r, size == dims); |
| 75 | } else { |
| 76 | REPORTER_ASSERT(r, computedSampleSize > 1); |
| 77 | if (size.width() >= dims.width() || size.height() >= dims.height()) { |
| 78 | ERRORF(r, "File %s's computed sample size (%i) is bigger than" |
| 79 | " original? original: %i x %i\tsampled: %i x %i", |
| 80 | file, computedSampleSize, dims.width(), dims.height(), |
| 81 | size.width(), size.height()); |
| 82 | } |
| 83 | REPORTER_ASSERT(r, size.width() >= requested.width() && |
| 84 | size.height() >= requested.height()); |
| 85 | REPORTER_ASSERT(r, size.width() < dims.width() && |
| 86 | size.height() < dims.height()); |
| 87 | } |
| 88 | } |
| 89 | |
| 90 | const SkISize upscales[] = { |
| 91 | dims, plus(dims, 5), times(dims, 2), |
| 92 | }; |
| 93 | for (SkISize size : upscales) { |
| 94 | const int computedSampleSize = codec->computeSampleSize(&size); |
| 95 | REPORTER_ASSERT(r, computedSampleSize == 1); |
| 96 | REPORTER_ASSERT(r, dims == size); |
| 97 | } |
| 98 | |
| 99 | // This mimics how Android's ImageDecoder uses SkAndroidCodec. A client |
| 100 | // can choose their dimensions based on calling getSampledDimensions, |
| 101 | // but the ImageDecoder API takes an arbitrary size. It then uses |
| 102 | // computeSampleSize to determine the best dimensions and sampleSize. |
| 103 | // It should return the same dimensions. the sampleSize may be different |
| 104 | // due to integer division. |
| 105 | for (int sampleSize : { 1, 2, 3, 4, 8, 16, 32 }) { |
| 106 | const SkISize sampledDims = codec->getSampledDimensions(sampleSize); |
| 107 | SkISize size = sampledDims; |
| 108 | const int computedSampleSize = codec->computeSampleSize(&size); |
| 109 | if (sampledDims != size) { |
| 110 | ERRORF(r, "File '%s'->getSampledDimensions(%i) yields computed" |
| 111 | " sample size of %i\n\tsampledDimensions: %i x %i\t" |
| 112 | "computed dimensions: %i x %i", |
| 113 | file, sampleSize, computedSampleSize, |
| 114 | sampledDims.width(), sampledDims.height(), |
| 115 | size.width(), size.height()); |
| 116 | } |
| 117 | } |
| 118 | } |
| 119 | } |