1b5c604d9d
Also: Add SkDeflateWStream and associated unit tests. SkPDFBitmap is a replacement for SkPDFImage. As of now, it only supports 8888 bitmaps (the most common case). SkPDFBitmap takes very little extra memory (aside from refing the bitmap's pixels), and its emitObject() does not cache any data. The SkPDFBitmap::Create function will check the canon for duplicates. This can reduce the size of the output PDF. Motivation: this gives another ~40% decrease in PDF memory overhead TODO: Support other ColorTypes and scrap SkPDFImage. BUG=skia:3030 Review URL: https://codereview.chromium.org/918813002
77 lines
2.6 KiB
C++
77 lines
2.6 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 "SkDeflateWStream.h"
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#include "SkFlate.h"
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#include "SkRandom.h"
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#include "Test.h"
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#ifndef SK_NO_FLATE
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DEF_TEST(SkDeflateWStream, r) {
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SkRandom random(123456);
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for (int i = 0; i < 50; ++i) {
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uint32_t size = random.nextULessThan(10000);
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SkAutoTMalloc<uint8_t> buffer(size);
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for (uint32_t i = 0; i < size; ++i) {
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buffer[i] = random.nextU() & 0xff;
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}
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SkDynamicMemoryWStream dynamicMemoryWStream;
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{
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SkDeflateWStream deflateWStream(&dynamicMemoryWStream);
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uint32_t j = 0;
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while (j < size) {
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uint32_t writeSize =
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SkTMin(size - j, random.nextRangeU(1, 400));
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if (!deflateWStream.write(&buffer[j], writeSize)) {
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ERRORF(r, "something went wrong.");
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return;
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}
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j += writeSize;
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}
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}
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SkAutoTDelete<SkStreamAsset> compressed(
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dynamicMemoryWStream.detachAsStream());
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SkDynamicMemoryWStream decompressedDynamicMemoryWStream;
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SkAssertResult(SkFlate::Inflate(compressed,
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&decompressedDynamicMemoryWStream));
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SkAutoTDelete<SkStreamAsset> decompressed(
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decompressedDynamicMemoryWStream.detachAsStream());
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if (decompressed->getLength() != size) {
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ERRORF(r, "Decompression failed to get right size [%d]."
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" %u != %u", i, (unsigned)(decompressed->getLength()),
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(unsigned)size);
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SkString s = SkStringPrintf("/tmp/deftst_compressed_%d", i);
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SkFILEWStream o(s.c_str());
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o.writeStream(compressed.get(), compressed->getLength());
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compressed->rewind();
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s = SkStringPrintf("/tmp/deftst_input_%d", i);
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SkFILEWStream o2(s.c_str());
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o2.write(&buffer[0], size);
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continue;
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}
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uint32_t minLength = SkTMin(size,
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(uint32_t)(decompressed->getLength()));
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for (uint32_t i = 0; i < minLength; ++i) {
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uint8_t c;
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SkDEBUGCODE(size_t rb =)decompressed->read(&c, sizeof(uint8_t));
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SkASSERT(sizeof(uint8_t) == rb);
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if (buffer[i] != c) {
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ERRORF(r, "Decompression failed at byte %u.", (unsigned)i);
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break;
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}
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}
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}
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}
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#endif // SK_NO_FLATE
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