/*
* 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 "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);
}
static void check(skiatest::Reporter* r,
const char path[],
SkISize size,
bool supportsScanlineDecoding) {
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);
SkImageGenerator::Result result =
codec->getPixels(info, bm.getPixels(), bm.rowBytes(), NULL, NULL, NULL);
REPORTER_ASSERT(r, result == SkImageGenerator::kSuccess);
SkMD5::Digest digest1, digest2;
md5(bm, &digest1);
bm.eraseColor(SK_ColorYELLOW);
result =
codec->getPixels(info, bm.getPixels(), bm.rowBytes(), NULL, NULL, NULL);
REPORTER_ASSERT(r, result == SkImageGenerator::kSuccess);
// verify that re-decoding gives the same result.
md5(bm, &digest2);
REPORTER_ASSERT(r, digest1 == digest2);
SkScanlineDecoder* scanlineDecoder = codec->getScanlineDecoder(info);
if (supportsScanlineDecoding) {
bm.eraseColor(SK_ColorYELLOW);
REPORTER_ASSERT(r, scanlineDecoder);
for (int y = 0; y < info.height(); y++) {
result = scanlineDecoder->getScanlines(bm.getAddr(0, y), 1, 0);
REPORTER_ASSERT(r, result == SkImageGenerator::kSuccess);
}
// verify that scanline decoding gives the same result.
SkMD5::Digest digest3;
md5(bm, &digest3);
REPORTER_ASSERT(r, digest3 == digest1);
} else {
REPORTER_ASSERT(r, !scanlineDecoder);
}
}
DEF_TEST(Codec, r) {
// WBMP
check(r, "mandrill.wbmp", SkISize::Make(512, 512), false);
// BMP
check(r, "randPixels.bmp", SkISize::Make(8, 8), false);
// ICO
// These two tests examine interestingly different behavior:
// Decodes an embedded BMP image
check(r, "color_wheel.ico", SkISize::Make(128, 128), false);
// Decodes an embedded PNG image
check(r, "google_chrome.ico", SkISize::Make(256, 256), false);
// GIF
check(r, "box.gif", SkISize::Make(200, 55), false);
check(r, "color_wheel.gif", SkISize::Make(128, 128), false);
check(r, "randPixels.gif", SkISize::Make(8, 8), false);
// JPG
check(r, "CMYK.jpg", SkISize::Make(642, 516), true);
check(r, "color_wheel.jpg", SkISize::Make(128, 128), true);
check(r, "grayscale.jpg", SkISize::Make(128, 128), true);
check(r, "mandrill_512_q075.jpg", SkISize::Make(512, 512), true);
check(r, "randPixels.jpg", SkISize::Make(8, 8), true);
// PNG
check(r, "arrow.png", SkISize::Make(187, 312), true);
check(r, "baby_tux.png", SkISize::Make(240, 246), true);
check(r, "color_wheel.png", SkISize::Make(128, 128), true);
check(r, "half-transparent-white-pixel.png", SkISize::Make(1, 1), true);
check(r, "mandrill_128.png", SkISize::Make(128, 128), true);
check(r, "mandrill_16.png", SkISize::Make(16, 16), true);
check(r, "mandrill_256.png", SkISize::Make(256, 256), true);
check(r, "mandrill_32.png", SkISize::Make(32, 32), true);
check(r, "mandrill_512.png", SkISize::Make(512, 512), true);
check(r, "mandrill_64.png", SkISize::Make(64, 64), true);
check(r, "plane.png", SkISize::Make(250, 126), true);
check(r, "randPixels.png", SkISize::Make(8, 8), true);
check(r, "yellow_rose.png", SkISize::Make(400, 301), true);
}
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);
SkImageGenerator::Result result =
codec->getPixels(scaledInfo, pixels.get(), rowBytes, NULL, NULL, NULL);
REPORTER_ASSERT(r, SkImageGenerator::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");
}