132 lines
4.3 KiB
C++
132 lines
4.3 KiB
C++
/*
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* Copyright 2022 Google LLC
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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 "include/core/SkData.h"
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#include "include/core/SkFont.h"
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#include "include/core/SkRefCnt.h"
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#include "include/core/SkSpan.h"
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#include "include/core/SkTypes.h"
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#include "src/base/SkZip.h"
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#include "src/core/SkDescriptor.h"
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#include "src/core/SkGlyph.h"
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#include "src/core/SkReadBuffer.h"
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#include "src/core/SkStrike.h"
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#include "src/core/SkStrikeSpec.h"
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#include "src/core/SkWriteBuffer.h"
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#include "src/text/StrikeForGPU.h"
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#include "src/text/gpu/GlyphVector.h"
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#include "src/text/gpu/SubRunAllocator.h"
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#include "tests/Test.h"
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#include <initializer_list>
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#include <limits.h>
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#include <optional>
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#include <utility>
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using GlyphVector = sktext::gpu::GlyphVector;
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using SubRunAllocator = sktext::gpu::SubRunAllocator;
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namespace sktext::gpu {
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class GlyphVectorTestingPeer {
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public:
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static const SkDescriptor& GetDescriptor(const GlyphVector& v) {
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return v.fStrikePromise.descriptor();
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}
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static SkSpan<GlyphVector::Variant> GetGlyphs(const GlyphVector& v) {
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return v.fGlyphs;
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}
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};
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DEF_TEST(GlyphVector_Serialization, r) {
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SkFont font;
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auto [strikeSpec, _] = SkStrikeSpec::MakeCanonicalized(font);
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SubRunAllocator alloc;
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const int N = 10;
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SkPackedGlyphID* glyphs = alloc.makePODArray<SkPackedGlyphID>(N);
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for (int i = 0; i < N; i++) {
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glyphs[i] = SkPackedGlyphID(SkGlyphID(i));
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}
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SkStrikePromise promise{strikeSpec.findOrCreateStrike()};
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GlyphVector src = GlyphVector::Make(std::move(promise), SkSpan(glyphs, N), &alloc);
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SkBinaryWriteBuffer wBuffer;
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src.flatten(wBuffer);
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auto data = wBuffer.snapshotAsData();
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SkReadBuffer rBuffer{data->data(), data->size()};
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auto dst = GlyphVector::MakeFromBuffer(rBuffer, nullptr, &alloc);
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REPORTER_ASSERT(r, dst.has_value());
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REPORTER_ASSERT(r,
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GlyphVectorTestingPeer::GetDescriptor(src) ==
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GlyphVectorTestingPeer::GetDescriptor(*dst));
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auto srcGlyphs = GlyphVectorTestingPeer::GetGlyphs(src);
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auto dstGlyphs = GlyphVectorTestingPeer::GetGlyphs(*dst);
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for (auto [srcGlyphID, dstGlyphID] : SkMakeZip(srcGlyphs, dstGlyphs)) {
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REPORTER_ASSERT(r, srcGlyphID.packedGlyphID == dstGlyphID.packedGlyphID);
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}
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}
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DEF_TEST(GlyphVector_BadLengths, r) {
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auto [strikeSpec, _] = SkStrikeSpec::MakeCanonicalized(SkFont());
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// Strike to keep in the strike cache.
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auto strike = strikeSpec.findOrCreateStrike();
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// Be sure to keep the strike alive. The promise to serialize as the first part of the
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// GlyphVector.
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SkStrikePromise promise{sk_sp<SkStrike>(strike)};
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{
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// Make broken stream by hand - zero length
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SkBinaryWriteBuffer wBuffer;
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promise.flatten(wBuffer);
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wBuffer.write32(0); // length
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auto data = wBuffer.snapshotAsData();
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SkReadBuffer rBuffer{data->data(), data->size()};
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SubRunAllocator alloc;
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auto dst = GlyphVector::MakeFromBuffer(rBuffer, nullptr, &alloc);
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REPORTER_ASSERT(r, !dst.has_value());
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}
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{
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// Make broken stream by hand - zero length
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SkBinaryWriteBuffer wBuffer;
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promise.flatten(wBuffer);
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// Make broken stream by hand - stream is too short
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wBuffer.write32(5); // length
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wBuffer.writeUInt(12); // random data
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wBuffer.writeUInt(12); // random data
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wBuffer.writeUInt(12); // random data
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auto data = wBuffer.snapshotAsData();
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SkReadBuffer rBuffer{data->data(), data->size()};
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SubRunAllocator alloc;
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auto dst = GlyphVector::MakeFromBuffer(rBuffer, nullptr, &alloc);
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REPORTER_ASSERT(r, !dst.has_value());
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}
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{
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// Make broken stream by hand - length out of range of safe calculations
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SkBinaryWriteBuffer wBuffer;
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promise.flatten(wBuffer);
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wBuffer.write32(INT_MAX - 10); // length
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wBuffer.writeUInt(12); // random data
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wBuffer.writeUInt(12); // random data
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wBuffer.writeUInt(12); // random data
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auto data = wBuffer.snapshotAsData();
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SkReadBuffer rBuffer{data->data(), data->size()};
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SubRunAllocator alloc;
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auto dst = GlyphVector::MakeFromBuffer(rBuffer, nullptr, &alloc);
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REPORTER_ASSERT(r, !dst.has_value());
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}
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}
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} // namespace sktext::gpu
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