blob: 82e490a2bd5676d2eb69be89cdd5e5d69eb33725 [file] [log] [blame]
/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "Resources.h"
#include "SkBitmap.h"
#include "SkCodec.h"
#include "SkMD5.h"
#include "SkRandom.h"
#include "SkScanlineDecoder.h"
#include "Test.h"
static SkStreamAsset* resource(const char path[]) {
SkString fullPath = GetResourcePath(path);
return SkStream::NewFromFile(fullPath.c_str());
}
static void md5(const SkBitmap& bm, SkMD5::Digest* digest) {
SkAutoLockPixels autoLockPixels(bm);
SkASSERT(bm.getPixels());
SkMD5 md5;
size_t rowLen = bm.info().bytesPerPixel() * bm.width();
for (int y = 0; y < bm.height(); ++y) {
md5.update(static_cast<uint8_t*>(bm.getAddr(0, y)), rowLen);
}
md5.finish(*digest);
}
/**
* Compute the digest for bm and compare it to a known good digest.
* @param r Reporter to assert that bm's digest matches goodDigest.
* @param goodDigest The known good digest to compare to.
* @param bm The bitmap to test.
*/
static void compare_to_good_digest(skiatest::Reporter* r, const SkMD5::Digest& goodDigest,
const SkBitmap& bm) {
SkMD5::Digest digest;
md5(bm, &digest);
REPORTER_ASSERT(r, digest == goodDigest);
}
SkIRect generate_random_subset(SkRandom* rand, int w, int h) {
SkIRect rect;
do {
rect.fLeft = rand->nextRangeU(0, w);
rect.fTop = rand->nextRangeU(0, h);
rect.fRight = rand->nextRangeU(0, w);
rect.fBottom = rand->nextRangeU(0, h);
rect.sort();
} while (rect.isEmpty());
return rect;
}
static void check(skiatest::Reporter* r,
const char path[],
SkISize size,
bool supportsScanlineDecoding,
bool supportsSubsetDecoding) {
SkAutoTDelete<SkStream> stream(resource(path));
if (!stream) {
SkDebugf("Missing resource '%s'\n", path);
return;
}
SkAutoTDelete<SkCodec> codec(SkCodec::NewFromStream(stream.detach()));
if (!codec) {
ERRORF(r, "Unable to decode '%s'", path);
return;
}
// This test is used primarily to verify rewinding works properly. Using kN32 allows
// us to test this without the added overhead of creating different bitmaps depending
// on the color type (ex: building a color table for kIndex8). DM is where we test
// decodes to all possible destination color types.
SkImageInfo info = codec->getInfo().makeColorType(kN32_SkColorType);
REPORTER_ASSERT(r, info.dimensions() == size);
SkBitmap bm;
bm.allocPixels(info);
SkAutoLockPixels autoLockPixels(bm);
SkCodec::Result result =
codec->getPixels(info, bm.getPixels(), bm.rowBytes(), NULL, NULL, NULL);
REPORTER_ASSERT(r, result == SkCodec::kSuccess);
SkMD5::Digest digest;
md5(bm, &digest);
bm.eraseColor(SK_ColorYELLOW);
result =
codec->getPixels(info, bm.getPixels(), bm.rowBytes(), NULL, NULL, NULL);
REPORTER_ASSERT(r, result == SkCodec::kSuccess);
// verify that re-decoding gives the same result.
compare_to_good_digest(r, digest, bm);
SkAutoTDelete<SkScanlineDecoder> scanlineDecoder(codec->getScanlineDecoder(info));
if (supportsScanlineDecoding) {
bm.eraseColor(SK_ColorYELLOW);
REPORTER_ASSERT(r, scanlineDecoder);
// Regular decodes should not be affected by creating a scanline decoder
result = codec->getPixels(info, bm.getPixels(), bm.rowBytes(), NULL, NULL, NULL);
REPORTER_ASSERT(r, SkCodec::kSuccess == result);
compare_to_good_digest(r, digest, bm);
bm.eraseColor(SK_ColorYELLOW);
for (int y = 0; y < info.height(); y++) {
result = scanlineDecoder->getScanlines(bm.getAddr(0, y), 1, 0);
REPORTER_ASSERT(r, result == SkCodec::kSuccess);
}
// verify that scanline decoding gives the same result.
compare_to_good_digest(r, digest, bm);
} else {
REPORTER_ASSERT(r, !scanlineDecoder);
}
// The rest of this function tests decoding subsets, and will decode an arbitrary number of
// random subsets.
// Do not attempt to decode subsets of an image of only once pixel, since there is no
// meaningful subset.
if (size.width() * size.height() == 1) {
return;
}
SkRandom rand;
SkIRect subset;
SkCodec::Options opts;
opts.fSubset = &subset;
for (int i = 0; i < 5; i++) {
subset = generate_random_subset(&rand, size.width(), size.height());
SkASSERT(!subset.isEmpty());
const bool supported = codec->getValidSubset(&subset);
REPORTER_ASSERT(r, supported == supportsSubsetDecoding);
SkImageInfo subsetInfo = info.makeWH(subset.width(), subset.height());
SkBitmap bm;
bm.allocPixels(subsetInfo);
const SkCodec::Result result = codec->getPixels(bm.info(), bm.getPixels(), bm.rowBytes(),
&opts, NULL, NULL);
if (supportsSubsetDecoding) {
REPORTER_ASSERT(r, result == SkCodec::kSuccess);
// Webp is the only codec that supports subsets, and it will have modified the subset
// to have even left/top.
REPORTER_ASSERT(r, SkIsAlign2(subset.fLeft) && SkIsAlign2(subset.fTop));
} else {
// No subsets will work.
REPORTER_ASSERT(r, result == SkCodec::kUnimplemented);
}
}
}
DEF_TEST(Codec, r) {
// WBMP
check(r, "mandrill.wbmp", SkISize::Make(512, 512), false, false);
// WEBP
check(r, "baby_tux.webp", SkISize::Make(386, 395), false, true);
check(r, "color_wheel.webp", SkISize::Make(128, 128), false, true);
check(r, "yellow_rose.webp", SkISize::Make(400, 301), false, true);
// BMP
check(r, "randPixels.bmp", SkISize::Make(8, 8), false, false);
// ICO
// These two tests examine interestingly different behavior:
// Decodes an embedded BMP image
check(r, "color_wheel.ico", SkISize::Make(128, 128), false, false);
// Decodes an embedded PNG image
check(r, "google_chrome.ico", SkISize::Make(256, 256), false, false);
// GIF
check(r, "box.gif", SkISize::Make(200, 55), false, false);
check(r, "color_wheel.gif", SkISize::Make(128, 128), false, false);
check(r, "randPixels.gif", SkISize::Make(8, 8), false, false);
// JPG
check(r, "CMYK.jpg", SkISize::Make(642, 516), true, false);
check(r, "color_wheel.jpg", SkISize::Make(128, 128), true, false);
check(r, "grayscale.jpg", SkISize::Make(128, 128), true, false);
check(r, "mandrill_512_q075.jpg", SkISize::Make(512, 512), true, false);
check(r, "randPixels.jpg", SkISize::Make(8, 8), true, false);
// PNG
check(r, "arrow.png", SkISize::Make(187, 312), true, false);
check(r, "baby_tux.png", SkISize::Make(240, 246), true, false);
check(r, "color_wheel.png", SkISize::Make(128, 128), true, false);
check(r, "half-transparent-white-pixel.png", SkISize::Make(1, 1), true, false);
check(r, "mandrill_128.png", SkISize::Make(128, 128), true, false);
check(r, "mandrill_16.png", SkISize::Make(16, 16), true, false);
check(r, "mandrill_256.png", SkISize::Make(256, 256), true, false);
check(r, "mandrill_32.png", SkISize::Make(32, 32), true, false);
check(r, "mandrill_512.png", SkISize::Make(512, 512), true, false);
check(r, "mandrill_64.png", SkISize::Make(64, 64), true, false);
check(r, "plane.png", SkISize::Make(250, 126), true, false);
check(r, "randPixels.png", SkISize::Make(8, 8), true, false);
check(r, "yellow_rose.png", SkISize::Make(400, 301), true, false);
}
static void test_invalid_stream(skiatest::Reporter* r, const void* stream, size_t len) {
SkCodec* codec = SkCodec::NewFromStream(new SkMemoryStream(stream, len, false));
// We should not have gotten a codec. Bots should catch us if we leaked anything.
REPORTER_ASSERT(r, !codec);
}
// Ensure that SkCodec::NewFromStream handles freeing the passed in SkStream,
// even on failure. Test some bad streams.
DEF_TEST(Codec_leaks, r) {
// No codec should claim this as their format, so this tests SkCodec::NewFromStream.
const char nonSupportedStream[] = "hello world";
// The other strings should look like the beginning of a file type, so we'll call some
// internal version of NewFromStream, which must also delete the stream on failure.
const unsigned char emptyPng[] = { 0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a };
const unsigned char emptyJpeg[] = { 0xFF, 0xD8, 0xFF };
const char emptyWebp[] = "RIFF1234WEBPVP";
const char emptyBmp[] = { 'B', 'M' };
const char emptyIco[] = { '\x00', '\x00', '\x01', '\x00' };
const char emptyGif[] = "GIFVER";
test_invalid_stream(r, nonSupportedStream, sizeof(nonSupportedStream));
test_invalid_stream(r, emptyPng, sizeof(emptyPng));
test_invalid_stream(r, emptyJpeg, sizeof(emptyJpeg));
test_invalid_stream(r, emptyWebp, sizeof(emptyWebp));
test_invalid_stream(r, emptyBmp, sizeof(emptyBmp));
test_invalid_stream(r, emptyIco, sizeof(emptyIco));
test_invalid_stream(r, emptyGif, sizeof(emptyGif));
}
static void test_dimensions(skiatest::Reporter* r, const char path[]) {
// Create the codec from the resource file
SkAutoTDelete<SkStream> stream(resource(path));
if (!stream) {
SkDebugf("Missing resource '%s'\n", path);
return;
}
SkAutoTDelete<SkCodec> codec(SkCodec::NewFromStream(stream.detach()));
if (!codec) {
ERRORF(r, "Unable to create codec '%s'", path);
return;
}
// Check that the decode is successful for a variety of scales
for (float scale = -0.05f; scale < 2.0f; scale += 0.05f) {
// Scale the output dimensions
SkISize scaledDims = codec->getScaledDimensions(scale);
SkImageInfo scaledInfo = codec->getInfo().makeWH(scaledDims.width(), scaledDims.height());
// Set up for the decode
size_t rowBytes = scaledDims.width() * sizeof(SkPMColor);
size_t totalBytes = scaledInfo.getSafeSize(rowBytes);
SkAutoTMalloc<SkPMColor> pixels(totalBytes);
SkCodec::Result result =
codec->getPixels(scaledInfo, pixels.get(), rowBytes, NULL, NULL, NULL);
REPORTER_ASSERT(r, SkCodec::kSuccess == result);
}
}
// Ensure that onGetScaledDimensions returns valid image dimensions to use for decodes
DEF_TEST(Codec_Dimensions, r) {
// JPG
test_dimensions(r, "CMYK.jpg");
test_dimensions(r, "color_wheel.jpg");
test_dimensions(r, "grayscale.jpg");
test_dimensions(r, "mandrill_512_q075.jpg");
test_dimensions(r, "randPixels.jpg");
}
static void test_empty(skiatest::Reporter* r, const char path[]) {
SkAutoTDelete<SkStream> stream(resource(path));
if (!stream) {
SkDebugf("Missing resource '%s'\n", path);
return;
}
SkAutoTDelete<SkCodec> codec(SkCodec::NewFromStream(stream.detach()));
REPORTER_ASSERT(r, NULL == codec);
}
DEF_TEST(Codec_Empty, r) {
// Test images that should not be able to create a codec
test_empty(r, "empty_images/zero-dims.gif");
test_empty(r, "empty_images/zero-embedded.ico");
test_empty(r, "empty_images/zero-width.bmp");
test_empty(r, "empty_images/zero-height.bmp");
test_empty(r, "empty_images/zero-width.jpg");
test_empty(r, "empty_images/zero-height.jpg");
test_empty(r, "empty_images/zero-width.png");
test_empty(r, "empty_images/zero-height.png");
test_empty(r, "empty_images/zero-width.wbmp");
test_empty(r, "empty_images/zero-height.wbmp");
}