| // Copyright 2016 The PDFium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com |
| |
| #ifndef CORE_FPDFAPI_PARSER_FPDF_PARSER_DECODE_H_ |
| #define CORE_FPDFAPI_PARSER_FPDF_PARSER_DECODE_H_ |
| |
| #include <stdint.h> |
| |
| #include <memory> |
| #include <utility> |
| #include <vector> |
| |
| #include "core/fxcrt/data_vector.h" |
| #include "core/fxcrt/fx_memory_wrappers.h" |
| #include "core/fxcrt/fx_string.h" |
| #include "core/fxcrt/retain_ptr.h" |
| #include "third_party/abseil-cpp/absl/types/optional.h" |
| #include "third_party/base/containers/span.h" |
| |
| class CPDF_Array; |
| class CPDF_Dictionary; |
| class CPDF_Object; |
| |
| namespace fxcodec { |
| class ScanlineDecoder; |
| } |
| |
| // Indexed by 8-bit char code, contains unicode code points. |
| extern const uint16_t kPDFDocEncoding[256]; |
| |
| bool ValidateDecoderPipeline(const CPDF_Array* pDecoders); |
| |
| ByteString PDF_EncodeString(ByteStringView src); |
| ByteString PDF_HexEncodeString(ByteStringView src); |
| WideString PDF_DecodeText(pdfium::span<const uint8_t> span); |
| ByteString PDF_EncodeText(WideStringView str); |
| |
| std::unique_ptr<fxcodec::ScanlineDecoder> CreateFaxDecoder( |
| pdfium::span<const uint8_t> src_span, |
| int width, |
| int height, |
| const CPDF_Dictionary* pParams); |
| |
| std::unique_ptr<fxcodec::ScanlineDecoder> CreateFlateDecoder( |
| pdfium::span<const uint8_t> src_span, |
| int width, |
| int height, |
| int nComps, |
| int bpc, |
| const CPDF_Dictionary* pParams); |
| |
| uint32_t RunLengthDecode(pdfium::span<const uint8_t> src_span, |
| std::unique_ptr<uint8_t, FxFreeDeleter>* dest_buf, |
| uint32_t* dest_size); |
| |
| uint32_t A85Decode(pdfium::span<const uint8_t> src_span, |
| std::unique_ptr<uint8_t, FxFreeDeleter>* dest_buf, |
| uint32_t* dest_size); |
| |
| uint32_t HexDecode(pdfium::span<const uint8_t> src_span, |
| std::unique_ptr<uint8_t, FxFreeDeleter>* dest_buf, |
| uint32_t* dest_size); |
| |
| uint32_t FlateOrLZWDecode(bool bLZW, |
| pdfium::span<const uint8_t> src_span, |
| const CPDF_Dictionary* pParams, |
| uint32_t estimated_size, |
| std::unique_ptr<uint8_t, FxFreeDeleter>* dest_buf, |
| uint32_t* dest_size); |
| |
| // Returns absl::nullopt if the filter in |pDict| is the wrong type or an |
| // invalid decoder pipeline. |
| // Returns an empty vector if there is no filter, or if the filter is an empty |
| // array. |
| // Otherwise, returns a vector of decoders. |
| using DecoderArray = |
| std::vector<std::pair<ByteString, RetainPtr<const CPDF_Object>>>; |
| absl::optional<DecoderArray> GetDecoderArray( |
| RetainPtr<const CPDF_Dictionary> pDict); |
| |
| bool PDF_DataDecode(pdfium::span<const uint8_t> src_span, |
| uint32_t estimated_size, |
| bool bImageAcc, |
| const DecoderArray& decoder_array, |
| std::unique_ptr<uint8_t, FxFreeDeleter>* dest_buf, |
| uint32_t* dest_size, |
| ByteString* ImageEncoding, |
| RetainPtr<const CPDF_Dictionary>* pImageParams); |
| |
| #endif // CORE_FPDFAPI_PARSER_FPDF_PARSER_DECODE_H_ |