| |
| /* |
| * Copyright 2011 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| |
| #include "SkPDFCatalog.h" |
| #include "SkPDFTypes.h" |
| #include "SkStream.h" |
| |
| #ifdef SK_BUILD_FOR_WIN |
| #define SNPRINTF _snprintf |
| #else |
| #define SNPRINTF snprintf |
| #endif |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| SkPDFObjRef::SkPDFObjRef(SkPDFObject* obj) : fObj(obj) { |
| SkSafeRef(obj); |
| } |
| |
| SkPDFObjRef::~SkPDFObjRef() {} |
| |
| void SkPDFObjRef::emitObject(SkWStream* stream, SkPDFCatalog* catalog) { |
| stream->writeDecAsText(catalog->getObjectNumber(fObj.get())); |
| stream->writeText(" 0 R"); // Generation number is always 0. |
| } |
| |
| void SkPDFObjRef::addResources(SkTSet<SkPDFObject*>* resourceSet, |
| SkPDFCatalog* catalog) const { |
| SkPDFObject* obj = catalog->getSubstituteObject(fObj); |
| SkASSERT(obj); |
| if (resourceSet->add(obj)) { |
| obj->addResources(resourceSet, catalog); |
| } |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| SkPDFInt::SkPDFInt(int32_t value) : fValue(value) {} |
| SkPDFInt::~SkPDFInt() {} |
| |
| void SkPDFInt::emitObject(SkWStream* stream, SkPDFCatalog* catalog) { |
| stream->writeDecAsText(fValue); |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| SkPDFBool::SkPDFBool(bool value) : fValue(value) {} |
| SkPDFBool::~SkPDFBool() {} |
| |
| void SkPDFBool::emitObject(SkWStream* stream, SkPDFCatalog* catalog) { |
| if (fValue) { |
| stream->writeText("true"); |
| } else { |
| stream->writeText("false"); |
| } |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| SkPDFScalar::SkPDFScalar(SkScalar value) : fValue(value) {} |
| SkPDFScalar::~SkPDFScalar() {} |
| |
| void SkPDFScalar::emitObject(SkWStream* stream, SkPDFCatalog* catalog) { |
| Append(fValue, stream); |
| } |
| |
| // static |
| void SkPDFScalar::Append(SkScalar value, SkWStream* stream) { |
| // The range of reals in PDF/A is the same as SkFixed: +/- 32,767 and |
| // +/- 1/65,536 (though integers can range from 2^31 - 1 to -2^31). |
| // When using floats that are outside the whole value range, we can use |
| // integers instead. |
| |
| #if !defined(SK_ALLOW_LARGE_PDF_SCALARS) |
| if (value > 32767 || value < -32767) { |
| stream->writeDecAsText(SkScalarRoundToInt(value)); |
| return; |
| } |
| |
| char buffer[SkStrAppendScalar_MaxSize]; |
| char* end = SkStrAppendFixed(buffer, SkScalarToFixed(value)); |
| stream->write(buffer, end - buffer); |
| return; |
| #endif // !SK_ALLOW_LARGE_PDF_SCALARS |
| |
| #if defined(SK_ALLOW_LARGE_PDF_SCALARS) |
| // Floats have 24bits of significance, so anything outside that range is |
| // no more precise than an int. (Plus PDF doesn't support scientific |
| // notation, so this clamps to SK_Max/MinS32). |
| if (value > (1 << 24) || value < -(1 << 24)) { |
| stream->writeDecAsText(value); |
| return; |
| } |
| // Continue to enforce the PDF limits for small floats. |
| if (value < 1.0f/65536 && value > -1.0f/65536) { |
| stream->writeDecAsText(0); |
| return; |
| } |
| // SkStrAppendFloat might still use scientific notation, so use snprintf |
| // directly.. |
| static const int kFloat_MaxSize = 19; |
| char buffer[kFloat_MaxSize]; |
| int len = SNPRINTF(buffer, kFloat_MaxSize, "%#.8f", value); |
| // %f always prints trailing 0s, so strip them. |
| for (; buffer[len - 1] == '0' && len > 0; len--) { |
| buffer[len - 1] = '\0'; |
| } |
| if (buffer[len - 1] == '.') { |
| buffer[len - 1] = '\0'; |
| } |
| stream->writeText(buffer); |
| return; |
| #endif // SK_ALLOW_LARGE_PDF_SCALARS |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| SkPDFString::SkPDFString(const char value[]) |
| : fValue(FormatString(value, strlen(value))) { |
| } |
| |
| SkPDFString::SkPDFString(const SkString& value) |
| : fValue(FormatString(value.c_str(), value.size())) { |
| } |
| |
| SkPDFString::SkPDFString(const uint16_t* value, size_t len, bool wideChars) |
| : fValue(FormatString(value, len, wideChars)) { |
| } |
| |
| SkPDFString::~SkPDFString() {} |
| |
| void SkPDFString::emitObject(SkWStream* stream, SkPDFCatalog* catalog) { |
| stream->write(fValue.c_str(), fValue.size()); |
| } |
| |
| // static |
| SkString SkPDFString::FormatString(const char* input, size_t len) { |
| return DoFormatString(input, len, false, false); |
| } |
| |
| SkString SkPDFString::FormatString(const uint16_t* input, size_t len, |
| bool wideChars) { |
| return DoFormatString(input, len, true, wideChars); |
| } |
| |
| // static |
| SkString SkPDFString::DoFormatString(const void* input, size_t len, |
| bool wideInput, bool wideOutput) { |
| SkASSERT(len <= kMaxLen); |
| const uint16_t* win = (const uint16_t*) input; |
| const char* cin = (const char*) input; |
| |
| if (wideOutput) { |
| SkASSERT(wideInput); |
| SkString result; |
| result.append("<"); |
| for (size_t i = 0; i < len; i++) { |
| result.appendHex(win[i], 4); |
| } |
| result.append(">"); |
| return result; |
| } |
| |
| // 7-bit clean is a heuristic to decide what string format to use; |
| // a 7-bit clean string should require little escaping. |
| bool sevenBitClean = true; |
| for (size_t i = 0; i < len; i++) { |
| SkASSERT(!wideInput || !(win[i] & ~0xFF)); |
| char val = wideInput ? win[i] : cin[i]; |
| if (val > '~' || val < ' ') { |
| sevenBitClean = false; |
| break; |
| } |
| } |
| |
| SkString result; |
| if (sevenBitClean) { |
| result.append("("); |
| for (size_t i = 0; i < len; i++) { |
| SkASSERT(!wideInput || !(win[i] & ~0xFF)); |
| char val = wideInput ? win[i] : cin[i]; |
| if (val == '\\' || val == '(' || val == ')') { |
| result.append("\\"); |
| } |
| result.append(&val, 1); |
| } |
| result.append(")"); |
| } else { |
| result.append("<"); |
| for (size_t i = 0; i < len; i++) { |
| SkASSERT(!wideInput || !(win[i] & ~0xFF)); |
| unsigned char val = wideInput ? win[i] : cin[i]; |
| result.appendHex(val, 2); |
| } |
| result.append(">"); |
| } |
| |
| return result; |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| SkPDFName::SkPDFName(const char name[]) : fValue(FormatName(SkString(name))) {} |
| SkPDFName::SkPDFName(const SkString& name) : fValue(FormatName(name)) {} |
| SkPDFName::~SkPDFName() {} |
| |
| bool SkPDFName::operator==(const SkPDFName& b) const { |
| return fValue == b.fValue; |
| } |
| |
| void SkPDFName::emitObject(SkWStream* stream, SkPDFCatalog* catalog) { |
| stream->write(fValue.c_str(), fValue.size()); |
| } |
| |
| // static |
| SkString SkPDFName::FormatName(const SkString& input) { |
| SkASSERT(input.size() <= kMaxLen); |
| // TODO(vandebo) If more escaping is needed, improve the linear scan. |
| static const char escaped[] = "#/%()<>[]{}"; |
| |
| SkString result("/"); |
| for (size_t i = 0; i < input.size(); i++) { |
| if (input[i] & 0x80 || input[i] < '!' || strchr(escaped, input[i])) { |
| result.append("#"); |
| // Mask with 0xFF to avoid sign extension. i.e. #FFFFFF81 |
| result.appendHex(input[i] & 0xFF, 2); |
| } else { |
| result.append(input.c_str() + i, 1); |
| } |
| } |
| |
| return result; |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| |
| SkPDFArray::SkPDFArray() {} |
| SkPDFArray::~SkPDFArray() { |
| fValue.unrefAll(); |
| } |
| |
| void SkPDFArray::emitObject(SkWStream* stream, SkPDFCatalog* catalog) { |
| stream->writeText("["); |
| for (int i = 0; i < fValue.count(); i++) { |
| catalog->getSubstituteObject(fValue[i])->emitObject(stream, catalog); |
| if (i + 1 < fValue.count()) { |
| stream->writeText(" "); |
| } |
| } |
| stream->writeText("]"); |
| } |
| |
| void SkPDFArray::addResources(SkTSet<SkPDFObject*>* resourceSet, |
| SkPDFCatalog* catalog) const { |
| for (int i = 0; i < fValue.count(); i++) { |
| catalog->getSubstituteObject(fValue[i]) |
| ->addResources(resourceSet, catalog); |
| } |
| } |
| |
| void SkPDFArray::reserve(int length) { |
| SkASSERT(length <= kMaxLen); |
| fValue.setReserve(length); |
| } |
| |
| SkPDFObject* SkPDFArray::setAt(int offset, SkPDFObject* value) { |
| SkASSERT(offset < fValue.count()); |
| value->ref(); |
| fValue[offset]->unref(); |
| fValue[offset] = value; |
| return value; |
| } |
| |
| SkPDFObject* SkPDFArray::append(SkPDFObject* value) { |
| SkASSERT(fValue.count() < kMaxLen); |
| value->ref(); |
| fValue.push(value); |
| return value; |
| } |
| |
| void SkPDFArray::appendInt(int32_t value) { |
| SkASSERT(fValue.count() < kMaxLen); |
| fValue.push(new SkPDFInt(value)); |
| } |
| |
| void SkPDFArray::appendScalar(SkScalar value) { |
| SkASSERT(fValue.count() < kMaxLen); |
| fValue.push(new SkPDFScalar(value)); |
| } |
| |
| void SkPDFArray::appendName(const char name[]) { |
| SkASSERT(fValue.count() < kMaxLen); |
| fValue.push(new SkPDFName(name)); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| SkPDFDict::SkPDFDict() {} |
| |
| SkPDFDict::SkPDFDict(const char type[]) { |
| insertName("Type", type); |
| } |
| |
| SkPDFDict::~SkPDFDict() { |
| clear(); |
| } |
| |
| int SkPDFDict::size() const { |
| SkAutoMutexAcquire lock(fMutex); |
| return fValue.count(); |
| } |
| |
| void SkPDFDict::emitObject(SkWStream* stream, SkPDFCatalog* catalog) { |
| SkAutoMutexAcquire lock(fMutex); // If another thread triggers a |
| // resize while this thread is in |
| // the for-loop, we can be left |
| // with a bad fValue[i] reference. |
| stream->writeText("<<"); |
| for (int i = 0; i < fValue.count(); i++) { |
| SkASSERT(fValue[i].key); |
| SkASSERT(fValue[i].value); |
| fValue[i].key->emitObject(stream, catalog); |
| stream->writeText(" "); |
| catalog->getSubstituteObject(fValue[i].value) |
| ->emitObject(stream, catalog); |
| stream->writeText("\n"); |
| } |
| stream->writeText(">>"); |
| } |
| |
| void SkPDFDict::addResources(SkTSet<SkPDFObject*>* resourceSet, |
| SkPDFCatalog* catalog) const { |
| for (int i = 0; i < fValue.count(); i++) { |
| SkASSERT(fValue[i].key); |
| SkASSERT(fValue[i].value); |
| fValue[i].key->addResources(resourceSet, catalog); |
| catalog->getSubstituteObject(fValue[i].value) |
| ->addResources(resourceSet, catalog); |
| } |
| } |
| |
| SkPDFObject* SkPDFDict::append(SkPDFName* key, SkPDFObject* value) { |
| SkASSERT(key); |
| SkASSERT(value); |
| SkAutoMutexAcquire lock(fMutex); // If the SkTDArray resizes while |
| // two threads access array, one |
| // is left with a bad pointer. |
| *(fValue.append()) = Rec(key, value); |
| return value; |
| } |
| |
| SkPDFObject* SkPDFDict::insert(SkPDFName* key, SkPDFObject* value) { |
| return this->append(SkRef(key), SkRef(value)); |
| } |
| |
| SkPDFObject* SkPDFDict::insert(const char key[], SkPDFObject* value) { |
| return this->append(new SkPDFName(key), SkRef(value)); |
| } |
| |
| void SkPDFDict::insertInt(const char key[], int32_t value) { |
| (void)this->append(new SkPDFName(key), new SkPDFInt(value)); |
| } |
| |
| void SkPDFDict::insertScalar(const char key[], SkScalar value) { |
| (void)this->append(new SkPDFName(key), new SkPDFScalar(value)); |
| } |
| |
| void SkPDFDict::insertName(const char key[], const char name[]) { |
| (void)this->append(new SkPDFName(key), new SkPDFName(name)); |
| } |
| |
| void SkPDFDict::clear() { |
| SkAutoMutexAcquire lock(fMutex); |
| for (int i = 0; i < fValue.count(); i++) { |
| SkASSERT(fValue[i].key); |
| SkASSERT(fValue[i].value); |
| fValue[i].key->unref(); |
| fValue[i].value->unref(); |
| } |
| fValue.reset(); |
| } |
| |
| void SkPDFDict::remove(const char key[]) { |
| SkASSERT(key); |
| SkPDFName name(key); |
| SkAutoMutexAcquire lock(fMutex); |
| for (int i = 0; i < fValue.count(); i++) { |
| SkASSERT(fValue[i].key); |
| if (*(fValue[i].key) == name) { |
| fValue[i].key->unref(); |
| SkASSERT(fValue[i].value); |
| fValue[i].value->unref(); |
| fValue.removeShuffle(i); |
| return; |
| } |
| } |
| } |
| |
| void SkPDFDict::mergeFrom(const SkPDFDict& other) { |
| SkAutoMutexAcquire lockOther(other.fMutex); |
| SkTDArray<Rec> copy(other.fValue); |
| lockOther.release(); // Do not hold both mutexes at once. |
| |
| SkAutoMutexAcquire lock(fMutex); |
| for (int i = 0; i < copy.count(); i++) { |
| *(fValue.append()) = Rec(SkRef(copy[i].key), SkRef(copy[i].value)); |
| } |
| } |