blob: 48048faa97fc6561c7a051267dac8ff3d179f999 [file] [log] [blame]
/*
* Copyright 2022 Google LLC
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "include/core/SkData.h"
#include "include/core/SkFont.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkSpan.h"
#include "include/core/SkTypes.h"
#include "src/core/SkDescriptor.h"
#include "src/core/SkGlyph.h"
#include "src/core/SkGlyphBuffer.h"
#include "src/core/SkReadBuffer.h"
#include "src/core/SkStrike.h"
#include "src/core/SkStrikeSpec.h"
#include "src/core/SkWriteBuffer.h"
#include "src/core/SkZip.h"
#include "src/text/StrikeForGPU.h"
#include "src/text/gpu/GlyphVector.h"
#include "src/text/gpu/SubRunAllocator.h"
#include "tests/Test.h"
#include <initializer_list>
#include <limits.h>
#include <optional>
#include <utility>
using GlyphVector = sktext::gpu::GlyphVector;
using SubRunAllocator = sktext::gpu::SubRunAllocator;
namespace sktext::gpu {
class GlyphVectorTestingPeer {
public:
static const SkDescriptor& GetDescriptor(const GlyphVector& v) {
return v.fStrikePromise.descriptor();
}
static SkSpan<GlyphVector::Variant> GetGlyphs(const GlyphVector& v) {
return v.fGlyphs;
}
};
DEF_TEST(GlyphVector_Serialization, r) {
SkFont font;
auto [strikeSpec, _] = SkStrikeSpec::MakeCanonicalized(font);
SubRunAllocator alloc;
const int N = 10;
SkGlyphVariant* glyphs = alloc.makePODArray<SkGlyphVariant>(N);
for (int i = 0; i < N; i++) {
glyphs[i] = SkPackedGlyphID(SkGlyphID(i));
}
SkStrikePromise promise{strikeSpec.findOrCreateStrike()};
GlyphVector src = GlyphVector::Make(std::move(promise), SkSpan(glyphs, N), &alloc);
SkBinaryWriteBuffer wBuffer;
src.flatten(wBuffer);
auto data = wBuffer.snapshotAsData();
SkReadBuffer rBuffer{data->data(), data->size()};
auto dst = GlyphVector::MakeFromBuffer(rBuffer, nullptr, &alloc);
REPORTER_ASSERT(r, dst.has_value());
REPORTER_ASSERT(r,
GlyphVectorTestingPeer::GetDescriptor(src) ==
GlyphVectorTestingPeer::GetDescriptor(*dst));
auto srcGlyphs = GlyphVectorTestingPeer::GetGlyphs(src);
auto dstGlyphs = GlyphVectorTestingPeer::GetGlyphs(*dst);
for (auto [srcGlyphID, dstGlyphID] : SkMakeZip(srcGlyphs, dstGlyphs)) {
REPORTER_ASSERT(r, srcGlyphID.packedGlyphID == dstGlyphID.packedGlyphID);
}
}
DEF_TEST(GlyphVector_BadLengths, r) {
auto [strikeSpec, _] = SkStrikeSpec::MakeCanonicalized(SkFont());
// Strike to keep in the strike cache.
auto strike = strikeSpec.findOrCreateStrike();
// Be sure to keep the strike alive. The promise to serialize as the first part of the
// GlyphVector.
SkStrikePromise promise{sk_sp<SkStrike>(strike)};
{
// Make broken stream by hand - zero length
SkBinaryWriteBuffer wBuffer;
promise.flatten(wBuffer);
wBuffer.write32(0); // length
auto data = wBuffer.snapshotAsData();
SkReadBuffer rBuffer{data->data(), data->size()};
SubRunAllocator alloc;
auto dst = GlyphVector::MakeFromBuffer(rBuffer, nullptr, &alloc);
REPORTER_ASSERT(r, !dst.has_value());
}
{
// Make broken stream by hand - zero length
SkBinaryWriteBuffer wBuffer;
promise.flatten(wBuffer);
// Make broken stream by hand - stream is too short
wBuffer.write32(5); // length
wBuffer.writeUInt(12); // random data
wBuffer.writeUInt(12); // random data
wBuffer.writeUInt(12); // random data
auto data = wBuffer.snapshotAsData();
SkReadBuffer rBuffer{data->data(), data->size()};
SubRunAllocator alloc;
auto dst = GlyphVector::MakeFromBuffer(rBuffer, nullptr, &alloc);
REPORTER_ASSERT(r, !dst.has_value());
}
{
// Make broken stream by hand - length out of range of safe calculations
SkBinaryWriteBuffer wBuffer;
promise.flatten(wBuffer);
wBuffer.write32(INT_MAX - 10); // length
wBuffer.writeUInt(12); // random data
wBuffer.writeUInt(12); // random data
wBuffer.writeUInt(12); // random data
auto data = wBuffer.snapshotAsData();
SkReadBuffer rBuffer{data->data(), data->size()};
SubRunAllocator alloc;
auto dst = GlyphVector::MakeFromBuffer(rBuffer, nullptr, &alloc);
REPORTER_ASSERT(r, !dst.has_value());
}
}
} // namespace sktext::gpu