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/*
* Copyright 2018 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkAndroidCodec.h"
#include "SkCodec.h"
#include "SkEncodedImageFormat.h"
#include "Resources.h"
#include "Test.h"
static SkISize times(const SkISize& size, float factor) {
return { (int) (size.width() * factor), (int) (size.height() * factor) };
}
static SkISize plus(const SkISize& size, int term) {
return { size.width() + term, size.height() + term };
}
static bool invalid(const SkISize& size) {
return size.width() < 1 || size.height() < 1;
}
DEF_TEST(AndroidCodec_computeSampleSize, r) {
if (GetResourcePath().isEmpty()) {
return;
}
for (const char* file : { "images/color_wheel.webp",
"images/ship.png",
"images/dog.jpg",
"images/color_wheel.gif",
"images/rle.bmp",
"images/google_chrome.ico",
"images/mandrill.wbmp",
#ifdef SK_CODEC_DECODES_RAW
"images/sample_1mp.dng",
#endif
}) {
auto data = GetResourceAsData(file);
if (!data) {
ERRORF(r, "Could not get %s", file);
continue;
}
auto codec = SkAndroidCodec::MakeFromCodec(SkCodec::MakeFromData(std::move(data)));
if (!codec) {
ERRORF(r, "Could not create codec for %s", file);
continue;
}
const auto dims = codec->getInfo().dimensions();
const SkISize downscales[] = {
plus(dims, -1),
times(dims, .15f),
times(dims, .6f),
{ (int32_t) (dims.width() * .25f), (int32_t) (dims.height() * .75f ) },
{ 1, 1 },
{ 1, 2 },
{ 2, 1 },
{ 0, -1 },
{ dims.width(), dims.height() - 1 },
};
for (SkISize size : downscales) {
const auto requested = size;
const int computedSampleSize = codec->computeSampleSize(&size);
REPORTER_ASSERT(r, size.width() >= 1 && size.height() >= 1);
if (codec->getEncodedFormat() == SkEncodedImageFormat::kWEBP) {
// WebP supports arbitrary down-scaling.
REPORTER_ASSERT(r, size == requested || invalid(requested));
} else if (computedSampleSize == 1) {
REPORTER_ASSERT(r, size == dims);
} else {
REPORTER_ASSERT(r, computedSampleSize > 1);
if (size.width() >= dims.width() || size.height() >= dims.height()) {
ERRORF(r, "File %s's computed sample size (%i) is bigger than"
" original? original: %i x %i\tsampled: %i x %i",
file, computedSampleSize, dims.width(), dims.height(),
size.width(), size.height());
}
REPORTER_ASSERT(r, size.width() >= requested.width() &&
size.height() >= requested.height());
REPORTER_ASSERT(r, size.width() < dims.width() &&
size.height() < dims.height());
}
}
const SkISize upscales[] = {
dims, plus(dims, 5), times(dims, 2),
};
for (SkISize size : upscales) {
const int computedSampleSize = codec->computeSampleSize(&size);
REPORTER_ASSERT(r, computedSampleSize == 1);
REPORTER_ASSERT(r, dims == size);
}
// This mimics how Android's ImageDecoder uses SkAndroidCodec. A client
// can choose their dimensions based on calling getSampledDimensions,
// but the ImageDecoder API takes an arbitrary size. It then uses
// computeSampleSize to determine the best dimensions and sampleSize.
// It should return the same dimensions. the sampleSize may be different
// due to integer division.
for (int sampleSize : { 1, 2, 3, 4, 8, 16, 32 }) {
const SkISize sampledDims = codec->getSampledDimensions(sampleSize);
SkISize size = sampledDims;
const int computedSampleSize = codec->computeSampleSize(&size);
if (sampledDims != size) {
ERRORF(r, "File '%s'->getSampledDimensions(%i) yields computed"
" sample size of %i\n\tsampledDimensions: %i x %i\t"
"computed dimensions: %i x %i",
file, sampleSize, computedSampleSize,
sampledDims.width(), sampledDims.height(),
size.width(), size.height());
}
}
}
}
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