222 lines
8.5 KiB
C++
222 lines
8.5 KiB
C++
/*
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* Copyright 2015 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "Resources.h"
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#include "SkBitmap.h"
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#include "SkCodec.h"
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#include "SkMD5.h"
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#include "Test.h"
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static SkStreamAsset* resource(const char path[]) {
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SkString fullPath = GetResourcePath(path);
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return SkStream::NewFromFile(fullPath.c_str());
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}
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static void md5(const SkBitmap& bm, SkMD5::Digest* digest) {
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SkAutoLockPixels autoLockPixels(bm);
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SkASSERT(bm.getPixels());
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SkMD5 md5;
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size_t rowLen = bm.info().bytesPerPixel() * bm.width();
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for (int y = 0; y < bm.height(); ++y) {
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md5.update(static_cast<uint8_t*>(bm.getAddr(0, y)), rowLen);
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}
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md5.finish(*digest);
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}
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static void check(skiatest::Reporter* r,
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const char path[],
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SkISize size,
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bool supportsScanlineDecoding) {
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SkAutoTDelete<SkStream> stream(resource(path));
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if (!stream) {
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SkDebugf("Missing resource '%s'\n", path);
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return;
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}
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SkAutoTDelete<SkCodec> codec(SkCodec::NewFromStream(stream.detach()));
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if (!codec) {
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ERRORF(r, "Unable to decode '%s'", path);
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return;
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}
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// This test is used primarily to verify rewinding works properly. Using kN32 allows
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// us to test this without the added overhead of creating different bitmaps depending
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// on the color type (ex: building a color table for kIndex8). DM is where we test
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// decodes to all possible destination color types.
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SkImageInfo info = codec->getInfo().makeColorType(kN32_SkColorType);
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REPORTER_ASSERT(r, info.dimensions() == size);
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SkBitmap bm;
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bm.allocPixels(info);
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SkAutoLockPixels autoLockPixels(bm);
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SkImageGenerator::Result result =
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codec->getPixels(info, bm.getPixels(), bm.rowBytes(), NULL, NULL, NULL);
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REPORTER_ASSERT(r, result == SkImageGenerator::kSuccess);
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SkMD5::Digest digest1, digest2;
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md5(bm, &digest1);
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bm.eraseColor(SK_ColorYELLOW);
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result =
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codec->getPixels(info, bm.getPixels(), bm.rowBytes(), NULL, NULL, NULL);
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REPORTER_ASSERT(r, result == SkImageGenerator::kSuccess);
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// verify that re-decoding gives the same result.
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md5(bm, &digest2);
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REPORTER_ASSERT(r, digest1 == digest2);
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SkScanlineDecoder* scanlineDecoder = codec->getScanlineDecoder(info);
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if (supportsScanlineDecoding) {
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bm.eraseColor(SK_ColorYELLOW);
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REPORTER_ASSERT(r, scanlineDecoder);
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for (int y = 0; y < info.height(); y++) {
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result = scanlineDecoder->getScanlines(bm.getAddr(0, y), 1, 0);
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REPORTER_ASSERT(r, result == SkImageGenerator::kSuccess);
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}
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// verify that scanline decoding gives the same result.
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SkMD5::Digest digest3;
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md5(bm, &digest3);
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REPORTER_ASSERT(r, digest3 == digest1);
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} else {
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REPORTER_ASSERT(r, !scanlineDecoder);
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}
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}
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DEF_TEST(Codec, r) {
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// WBMP
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check(r, "mandrill.wbmp", SkISize::Make(512, 512), false);
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// BMP
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check(r, "randPixels.bmp", SkISize::Make(8, 8), false);
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// ICO
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// These two tests examine interestingly different behavior:
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// Decodes an embedded BMP image
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check(r, "color_wheel.ico", SkISize::Make(128, 128), false);
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// Decodes an embedded PNG image
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check(r, "google_chrome.ico", SkISize::Make(256, 256), false);
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// GIF
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check(r, "box.gif", SkISize::Make(200, 55), false);
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check(r, "color_wheel.gif", SkISize::Make(128, 128), false);
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check(r, "randPixels.gif", SkISize::Make(8, 8), false);
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// JPG
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check(r, "CMYK.jpg", SkISize::Make(642, 516), true);
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check(r, "color_wheel.jpg", SkISize::Make(128, 128), true);
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check(r, "grayscale.jpg", SkISize::Make(128, 128), true);
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check(r, "mandrill_512_q075.jpg", SkISize::Make(512, 512), true);
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check(r, "randPixels.jpg", SkISize::Make(8, 8), true);
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// PNG
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check(r, "arrow.png", SkISize::Make(187, 312), true);
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check(r, "baby_tux.png", SkISize::Make(240, 246), true);
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check(r, "color_wheel.png", SkISize::Make(128, 128), true);
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check(r, "half-transparent-white-pixel.png", SkISize::Make(1, 1), true);
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check(r, "mandrill_128.png", SkISize::Make(128, 128), true);
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check(r, "mandrill_16.png", SkISize::Make(16, 16), true);
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check(r, "mandrill_256.png", SkISize::Make(256, 256), true);
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check(r, "mandrill_32.png", SkISize::Make(32, 32), true);
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check(r, "mandrill_512.png", SkISize::Make(512, 512), true);
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check(r, "mandrill_64.png", SkISize::Make(64, 64), true);
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check(r, "plane.png", SkISize::Make(250, 126), true);
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check(r, "randPixels.png", SkISize::Make(8, 8), true);
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check(r, "yellow_rose.png", SkISize::Make(400, 301), true);
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}
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static void test_invalid_stream(skiatest::Reporter* r, const void* stream, size_t len) {
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SkCodec* codec = SkCodec::NewFromStream(new SkMemoryStream(stream, len, false));
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// We should not have gotten a codec. Bots should catch us if we leaked anything.
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REPORTER_ASSERT(r, !codec);
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}
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// Ensure that SkCodec::NewFromStream handles freeing the passed in SkStream,
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// even on failure. Test some bad streams.
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DEF_TEST(Codec_leaks, r) {
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// No codec should claim this as their format, so this tests SkCodec::NewFromStream.
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const char nonSupportedStream[] = "hello world";
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// The other strings should look like the beginning of a file type, so we'll call some
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// internal version of NewFromStream, which must also delete the stream on failure.
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const unsigned char emptyPng[] = { 0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a };
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const unsigned char emptyJpeg[] = { 0xFF, 0xD8, 0xFF };
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const char emptyWebp[] = "RIFF1234WEBPVP";
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const char emptyBmp[] = { 'B', 'M' };
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const char emptyIco[] = { '\x00', '\x00', '\x01', '\x00' };
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const char emptyGif[] = "GIFVER";
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test_invalid_stream(r, nonSupportedStream, sizeof(nonSupportedStream));
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test_invalid_stream(r, emptyPng, sizeof(emptyPng));
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test_invalid_stream(r, emptyJpeg, sizeof(emptyJpeg));
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test_invalid_stream(r, emptyWebp, sizeof(emptyWebp));
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test_invalid_stream(r, emptyBmp, sizeof(emptyBmp));
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test_invalid_stream(r, emptyIco, sizeof(emptyIco));
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test_invalid_stream(r, emptyGif, sizeof(emptyGif));
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}
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static void test_dimensions(skiatest::Reporter* r, const char path[]) {
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// Create the codec from the resource file
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SkAutoTDelete<SkStream> stream(resource(path));
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if (!stream) {
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SkDebugf("Missing resource '%s'\n", path);
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return;
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}
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SkAutoTDelete<SkCodec> codec(SkCodec::NewFromStream(stream.detach()));
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if (!codec) {
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ERRORF(r, "Unable to create codec '%s'", path);
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return;
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}
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// Check that the decode is successful for a variety of scales
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for (float scale = -0.05f; scale < 2.0f; scale += 0.05f) {
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// Scale the output dimensions
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SkISize scaledDims = codec->getScaledDimensions(scale);
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SkImageInfo scaledInfo = codec->getInfo().makeWH(scaledDims.width(), scaledDims.height());
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// Set up for the decode
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size_t rowBytes = scaledDims.width() * sizeof(SkPMColor);
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size_t totalBytes = scaledInfo.getSafeSize(rowBytes);
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SkAutoTMalloc<SkPMColor> pixels(totalBytes);
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SkImageGenerator::Result result =
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codec->getPixels(scaledInfo, pixels.get(), rowBytes, NULL, NULL, NULL);
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REPORTER_ASSERT(r, SkImageGenerator::kSuccess == result);
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}
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}
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// Ensure that onGetScaledDimensions returns valid image dimensions to use for decodes
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DEF_TEST(Codec_Dimensions, r) {
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// JPG
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test_dimensions(r, "CMYK.jpg");
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test_dimensions(r, "color_wheel.jpg");
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test_dimensions(r, "grayscale.jpg");
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test_dimensions(r, "mandrill_512_q075.jpg");
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test_dimensions(r, "randPixels.jpg");
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}
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static void test_empty(skiatest::Reporter* r, const char path[]) {
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SkAutoTDelete<SkStream> stream(resource(path));
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if (!stream) {
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SkDebugf("Missing resource '%s'\n", path);
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return;
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}
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SkAutoTDelete<SkCodec> codec(SkCodec::NewFromStream(stream.detach()));
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REPORTER_ASSERT(r, NULL == codec);
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}
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DEF_TEST(Codec_Empty, r) {
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// Test images that should not be able to create a codec
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test_empty(r, "empty_images/zero-dims.gif");
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test_empty(r, "empty_images/zero-embedded.ico");
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test_empty(r, "empty_images/zero-width.bmp");
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test_empty(r, "empty_images/zero-height.bmp");
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test_empty(r, "empty_images/zero-width.jpg");
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test_empty(r, "empty_images/zero-height.jpg");
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test_empty(r, "empty_images/zero-width.png");
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test_empty(r, "empty_images/zero-height.png");
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test_empty(r, "empty_images/zero-width.wbmp");
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test_empty(r, "empty_images/zero-height.wbmp");
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}
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