| // Copyright 2014 PDFium Authors. All rights reserved. |
| // 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 |
| |
| #include "core/fxcodec/codec/ccodec_jpegmodule.h" |
| |
| #include <setjmp.h> |
| |
| #include <memory> |
| #include <utility> |
| |
| #include "core/fxcodec/codec/ccodec_scanlinedecoder.h" |
| #include "core/fxcodec/fx_codec.h" |
| #include "core/fxcrt/fx_memory.h" |
| #include "core/fxcrt/fx_safe_types.h" |
| #include "core/fxge/dib/cfx_dibbase.h" |
| #include "core/fxge/fx_dib.h" |
| #include "third_party/base/logging.h" |
| #include "third_party/base/ptr_util.h" |
| |
| extern "C" { |
| #undef FAR |
| #if defined(USE_SYSTEM_LIBJPEG) |
| #include <jpeglib.h> |
| #elif defined(USE_LIBJPEG_TURBO) |
| #include "third_party/libjpeg_turbo/jpeglib.h" |
| #else |
| #include "third_party/libjpeg/jpeglib.h" |
| #endif |
| } // extern "C" |
| |
| class CJpegContext final : public CodecModuleIface::Context { |
| public: |
| CJpegContext(); |
| ~CJpegContext() override; |
| |
| jmp_buf* GetJumpMark() { return &m_JumpMark; } |
| |
| jmp_buf m_JumpMark; |
| jpeg_decompress_struct m_Info; |
| jpeg_error_mgr m_ErrMgr; |
| jpeg_source_mgr m_SrcMgr; |
| unsigned int m_SkipSize; |
| void* (*m_AllocFunc)(unsigned int); |
| void (*m_FreeFunc)(void*); |
| }; |
| |
| static pdfium::span<const uint8_t> JpegScanSOI( |
| pdfium::span<const uint8_t> src_span) { |
| if (src_span.empty()) |
| return {}; |
| |
| for (size_t offset = 0; offset < src_span.size() - 1; ++offset) { |
| if (src_span[offset] == 0xff && src_span[offset + 1] == 0xd8) |
| return src_span.subspan(offset); |
| } |
| return src_span; |
| } |
| |
| extern "C" { |
| |
| static void _src_do_nothing(struct jpeg_decompress_struct* cinfo) {} |
| |
| static void _error_fatal(j_common_ptr cinfo) { |
| longjmp(*(jmp_buf*)cinfo->client_data, -1); |
| } |
| |
| static void _src_skip_data(struct jpeg_decompress_struct* cinfo, long num) { |
| if (num > (long)cinfo->src->bytes_in_buffer) { |
| _error_fatal((j_common_ptr)cinfo); |
| } |
| cinfo->src->next_input_byte += num; |
| cinfo->src->bytes_in_buffer -= num; |
| } |
| |
| static boolean _src_fill_buffer(j_decompress_ptr cinfo) { |
| return 0; |
| } |
| |
| static boolean _src_resync(j_decompress_ptr cinfo, int desired) { |
| return 0; |
| } |
| |
| static void _error_do_nothing(j_common_ptr cinfo) {} |
| |
| static void _error_do_nothing1(j_common_ptr cinfo, int) {} |
| |
| static void _error_do_nothing2(j_common_ptr cinfo, char*) {} |
| |
| #if _FX_PLATFORM_ == _FX_PLATFORM_WINDOWS_ |
| static void _dest_do_nothing(j_compress_ptr cinfo) {} |
| |
| static boolean _dest_empty(j_compress_ptr cinfo) { |
| return false; |
| } |
| #endif // _FX_PLATFORM_ == _FX_PLATFORM_WINDOWS_ |
| } // extern "C" |
| |
| #ifdef PDF_ENABLE_XFA |
| static void JpegLoadAttribute(struct jpeg_decompress_struct* pInfo, |
| CFX_DIBAttribute* pAttribute) { |
| if (!pAttribute) |
| return; |
| |
| pAttribute->m_nXDPI = pInfo->X_density; |
| pAttribute->m_nYDPI = pInfo->Y_density; |
| pAttribute->m_wDPIUnit = pInfo->density_unit; |
| } |
| #endif // PDF_ENABLE_XFA |
| |
| static bool JpegLoadInfo(pdfium::span<const uint8_t> src_span, |
| int* width, |
| int* height, |
| int* num_components, |
| int* bits_per_components, |
| bool* color_transform) { |
| src_span = JpegScanSOI(src_span); |
| struct jpeg_decompress_struct cinfo; |
| struct jpeg_error_mgr jerr; |
| jerr.error_exit = _error_fatal; |
| jerr.emit_message = _error_do_nothing1; |
| jerr.output_message = _error_do_nothing; |
| jerr.format_message = _error_do_nothing2; |
| jerr.reset_error_mgr = _error_do_nothing; |
| jerr.trace_level = 0; |
| cinfo.err = &jerr; |
| jmp_buf mark; |
| cinfo.client_data = &mark; |
| if (setjmp(mark) == -1) |
| return false; |
| |
| jpeg_create_decompress(&cinfo); |
| struct jpeg_source_mgr src; |
| src.init_source = _src_do_nothing; |
| src.term_source = _src_do_nothing; |
| src.skip_input_data = _src_skip_data; |
| src.fill_input_buffer = _src_fill_buffer; |
| src.resync_to_restart = _src_resync; |
| src.bytes_in_buffer = src_span.size(); |
| src.next_input_byte = src_span.data(); |
| cinfo.src = &src; |
| if (setjmp(mark) == -1) { |
| jpeg_destroy_decompress(&cinfo); |
| return false; |
| } |
| int ret = jpeg_read_header(&cinfo, true); |
| if (ret != JPEG_HEADER_OK) { |
| jpeg_destroy_decompress(&cinfo); |
| return false; |
| } |
| *width = cinfo.image_width; |
| *height = cinfo.image_height; |
| *num_components = cinfo.num_components; |
| *color_transform = |
| cinfo.jpeg_color_space == JCS_YCbCr || cinfo.jpeg_color_space == JCS_YCCK; |
| *bits_per_components = cinfo.data_precision; |
| jpeg_destroy_decompress(&cinfo); |
| return true; |
| } |
| |
| class CCodec_JpegDecoder final : public CCodec_ScanlineDecoder { |
| public: |
| CCodec_JpegDecoder(); |
| ~CCodec_JpegDecoder() override; |
| |
| bool Create(pdfium::span<const uint8_t> src_buf, |
| int width, |
| int height, |
| int nComps, |
| bool ColorTransform); |
| |
| // CCodec_ScanlineDecoder |
| bool v_Rewind() override; |
| uint8_t* v_GetNextLine() override; |
| uint32_t GetSrcOffset() override; |
| |
| bool InitDecode(); |
| |
| jmp_buf m_JmpBuf; |
| struct jpeg_decompress_struct cinfo; |
| struct jpeg_error_mgr jerr; |
| struct jpeg_source_mgr src; |
| pdfium::span<const uint8_t> m_SrcSpan; |
| std::unique_ptr<uint8_t, FxFreeDeleter> m_pScanlineBuf; |
| bool m_bInited = false; |
| bool m_bStarted = false; |
| bool m_bJpegTransform = false; |
| |
| private: |
| uint32_t m_nDefaultScaleDenom = 1; |
| }; |
| |
| CCodec_JpegDecoder::CCodec_JpegDecoder() { |
| memset(&cinfo, 0, sizeof(cinfo)); |
| memset(&jerr, 0, sizeof(jerr)); |
| memset(&src, 0, sizeof(src)); |
| } |
| |
| CCodec_JpegDecoder::~CCodec_JpegDecoder() { |
| if (m_bInited) |
| jpeg_destroy_decompress(&cinfo); |
| } |
| |
| bool CCodec_JpegDecoder::InitDecode() { |
| cinfo.err = &jerr; |
| cinfo.client_data = &m_JmpBuf; |
| if (setjmp(m_JmpBuf) == -1) |
| return false; |
| |
| jpeg_create_decompress(&cinfo); |
| m_bInited = true; |
| cinfo.src = &src; |
| src.bytes_in_buffer = m_SrcSpan.size(); |
| src.next_input_byte = m_SrcSpan.data(); |
| if (setjmp(m_JmpBuf) == -1) { |
| jpeg_destroy_decompress(&cinfo); |
| m_bInited = false; |
| return false; |
| } |
| cinfo.image_width = m_OrigWidth; |
| cinfo.image_height = m_OrigHeight; |
| int ret = jpeg_read_header(&cinfo, true); |
| if (ret != JPEG_HEADER_OK) |
| return false; |
| |
| if (cinfo.saw_Adobe_marker) |
| m_bJpegTransform = true; |
| |
| if (cinfo.num_components == 3 && !m_bJpegTransform) |
| cinfo.out_color_space = cinfo.jpeg_color_space; |
| |
| m_OrigWidth = cinfo.image_width; |
| m_OrigHeight = cinfo.image_height; |
| m_OutputWidth = m_OrigWidth; |
| m_OutputHeight = m_OrigHeight; |
| m_nDefaultScaleDenom = cinfo.scale_denom; |
| return true; |
| } |
| |
| bool CCodec_JpegDecoder::Create(pdfium::span<const uint8_t> src_span, |
| int width, |
| int height, |
| int nComps, |
| bool ColorTransform) { |
| m_SrcSpan = JpegScanSOI(src_span); |
| jerr.error_exit = _error_fatal; |
| jerr.emit_message = _error_do_nothing1; |
| jerr.output_message = _error_do_nothing; |
| jerr.format_message = _error_do_nothing2; |
| jerr.reset_error_mgr = _error_do_nothing; |
| src.init_source = _src_do_nothing; |
| src.term_source = _src_do_nothing; |
| src.skip_input_data = _src_skip_data; |
| src.fill_input_buffer = _src_fill_buffer; |
| src.resync_to_restart = _src_resync; |
| m_bJpegTransform = ColorTransform; |
| if (m_SrcSpan.size() >= 2) { |
| const_cast<uint8_t*>(m_SrcSpan.data())[m_SrcSpan.size() - 2] = 0xFF; |
| const_cast<uint8_t*>(m_SrcSpan.data())[m_SrcSpan.size() - 1] = 0xD9; |
| } |
| m_OutputWidth = m_OrigWidth = width; |
| m_OutputHeight = m_OrigHeight = height; |
| if (!InitDecode()) |
| return false; |
| |
| if (cinfo.num_components < nComps) |
| return false; |
| |
| if ((int)cinfo.image_width < width) |
| return false; |
| |
| m_Pitch = |
| (static_cast<uint32_t>(cinfo.image_width) * cinfo.num_components + 3) / |
| 4 * 4; |
| m_pScanlineBuf.reset(FX_Alloc(uint8_t, m_Pitch)); |
| m_nComps = cinfo.num_components; |
| m_bpc = 8; |
| m_bStarted = false; |
| return true; |
| } |
| |
| bool CCodec_JpegDecoder::v_Rewind() { |
| if (m_bStarted) { |
| jpeg_destroy_decompress(&cinfo); |
| if (!InitDecode()) { |
| return false; |
| } |
| } |
| if (setjmp(m_JmpBuf) == -1) { |
| return false; |
| } |
| cinfo.scale_denom = m_nDefaultScaleDenom; |
| m_OutputWidth = m_OrigWidth; |
| m_OutputHeight = m_OrigHeight; |
| if (!jpeg_start_decompress(&cinfo)) { |
| jpeg_destroy_decompress(&cinfo); |
| return false; |
| } |
| if ((int)cinfo.output_width > m_OrigWidth) { |
| NOTREACHED(); |
| return false; |
| } |
| m_bStarted = true; |
| return true; |
| } |
| |
| uint8_t* CCodec_JpegDecoder::v_GetNextLine() { |
| if (setjmp(m_JmpBuf) == -1) |
| return nullptr; |
| |
| uint8_t* row_array[] = {m_pScanlineBuf.get()}; |
| int nlines = jpeg_read_scanlines(&cinfo, row_array, 1); |
| return nlines > 0 ? m_pScanlineBuf.get() : nullptr; |
| } |
| |
| uint32_t CCodec_JpegDecoder::GetSrcOffset() { |
| return static_cast<uint32_t>(m_SrcSpan.size() - src.bytes_in_buffer); |
| } |
| |
| std::unique_ptr<CCodec_ScanlineDecoder> CCodec_JpegModule::CreateDecoder( |
| pdfium::span<const uint8_t> src_span, |
| int width, |
| int height, |
| int nComps, |
| bool ColorTransform) { |
| if (src_span.empty()) |
| return nullptr; |
| |
| auto pDecoder = pdfium::MakeUnique<CCodec_JpegDecoder>(); |
| if (!pDecoder->Create(src_span, width, height, nComps, ColorTransform)) |
| return nullptr; |
| |
| return std::move(pDecoder); |
| } |
| |
| bool CCodec_JpegModule::LoadInfo(pdfium::span<const uint8_t> src_span, |
| int* width, |
| int* height, |
| int* num_components, |
| int* bits_per_components, |
| bool* color_transform) { |
| return JpegLoadInfo(src_span, width, height, num_components, |
| bits_per_components, color_transform); |
| } |
| |
| extern "C" { |
| |
| static void _error_fatal1(j_common_ptr cinfo) { |
| auto* pContext = reinterpret_cast<CJpegContext*>(cinfo->client_data); |
| longjmp(pContext->m_JumpMark, -1); |
| } |
| |
| static void _src_skip_data1(struct jpeg_decompress_struct* cinfo, long num) { |
| if (cinfo->src->bytes_in_buffer < static_cast<size_t>(num)) { |
| auto* pContext = reinterpret_cast<CJpegContext*>(cinfo->client_data); |
| pContext->m_SkipSize = (unsigned int)(num - cinfo->src->bytes_in_buffer); |
| cinfo->src->bytes_in_buffer = 0; |
| } else { |
| cinfo->src->next_input_byte += num; |
| cinfo->src->bytes_in_buffer -= num; |
| } |
| } |
| |
| static void* jpeg_alloc_func(unsigned int size) { |
| return FX_Alloc(char, size); |
| } |
| |
| static void jpeg_free_func(void* p) { |
| FX_Free(p); |
| } |
| |
| } // extern "C" |
| |
| CJpegContext::CJpegContext() |
| : m_SkipSize(0), m_AllocFunc(jpeg_alloc_func), m_FreeFunc(jpeg_free_func) { |
| memset(&m_Info, 0, sizeof(m_Info)); |
| m_Info.client_data = this; |
| m_Info.err = &m_ErrMgr; |
| |
| memset(&m_ErrMgr, 0, sizeof(m_ErrMgr)); |
| m_ErrMgr.error_exit = _error_fatal1; |
| m_ErrMgr.emit_message = _error_do_nothing1; |
| m_ErrMgr.output_message = _error_do_nothing; |
| m_ErrMgr.format_message = _error_do_nothing2; |
| m_ErrMgr.reset_error_mgr = _error_do_nothing; |
| |
| memset(&m_SrcMgr, 0, sizeof(m_SrcMgr)); |
| m_SrcMgr.init_source = _src_do_nothing; |
| m_SrcMgr.term_source = _src_do_nothing; |
| m_SrcMgr.skip_input_data = _src_skip_data1; |
| m_SrcMgr.fill_input_buffer = _src_fill_buffer; |
| m_SrcMgr.resync_to_restart = _src_resync; |
| } |
| |
| CJpegContext::~CJpegContext() { |
| jpeg_destroy_decompress(&m_Info); |
| } |
| |
| std::unique_ptr<CodecModuleIface::Context> CCodec_JpegModule::Start() { |
| // Use ordinary pointer until past the possibility of a longjump. |
| auto* pContext = new CJpegContext(); |
| if (setjmp(pContext->m_JumpMark) == -1) { |
| delete pContext; |
| return nullptr; |
| } |
| |
| jpeg_create_decompress(&pContext->m_Info); |
| pContext->m_Info.src = &pContext->m_SrcMgr; |
| pContext->m_SkipSize = 0; |
| return pdfium::WrapUnique(pContext); |
| } |
| |
| bool CCodec_JpegModule::Input(Context* pContext, |
| pdfium::span<uint8_t> src_buf, |
| CFX_DIBAttribute*) { |
| auto* ctx = static_cast<CJpegContext*>(pContext); |
| if (ctx->m_SkipSize) { |
| if (ctx->m_SkipSize > src_buf.size()) { |
| ctx->m_SrcMgr.bytes_in_buffer = 0; |
| ctx->m_SkipSize -= src_buf.size(); |
| return true; |
| } |
| src_buf = src_buf.subspan(ctx->m_SkipSize); |
| ctx->m_SkipSize = 0; |
| } |
| ctx->m_SrcMgr.next_input_byte = src_buf.data(); |
| ctx->m_SrcMgr.bytes_in_buffer = src_buf.size(); |
| return true; |
| } |
| |
| #ifdef PDF_ENABLE_XFA |
| int CCodec_JpegModule::ReadHeader(Context* pContext, |
| int* width, |
| int* height, |
| int* nComps, |
| CFX_DIBAttribute* pAttribute) { |
| auto* ctx = static_cast<CJpegContext*>(pContext); |
| int ret = jpeg_read_header(&ctx->m_Info, true); |
| if (ret == JPEG_SUSPENDED) |
| return 2; |
| if (ret != JPEG_HEADER_OK) |
| return 1; |
| |
| *width = ctx->m_Info.image_width; |
| *height = ctx->m_Info.image_height; |
| *nComps = ctx->m_Info.num_components; |
| JpegLoadAttribute(&ctx->m_Info, pAttribute); |
| return 0; |
| } |
| #endif // PDF_ENABLE_XFA |
| |
| bool CCodec_JpegModule::StartScanline(Context* pContext, int down_scale) { |
| auto* ctx = static_cast<CJpegContext*>(pContext); |
| ctx->m_Info.scale_denom = static_cast<unsigned int>(down_scale); |
| return !!jpeg_start_decompress(&ctx->m_Info); |
| } |
| |
| bool CCodec_JpegModule::ReadScanline(Context* pContext, |
| unsigned char* dest_buf) { |
| auto* ctx = static_cast<CJpegContext*>(pContext); |
| unsigned int nlines = jpeg_read_scanlines(&ctx->m_Info, &dest_buf, 1); |
| return nlines == 1; |
| } |
| |
| FX_FILESIZE CCodec_JpegModule::GetAvailInput(Context* pContext) const { |
| auto* ctx = static_cast<CJpegContext*>(pContext); |
| return static_cast<FX_FILESIZE>(ctx->m_SrcMgr.bytes_in_buffer); |
| } |
| |
| jmp_buf* CCodec_JpegModule::GetJumpMark(Context* pContext) { |
| return static_cast<CJpegContext*>(pContext)->GetJumpMark(); |
| } |
| |
| #if _FX_PLATFORM_ == _FX_PLATFORM_WINDOWS_ |
| #define JPEG_BLOCK_SIZE 1048576 |
| bool CCodec_JpegModule::JpegEncode(const RetainPtr<CFX_DIBBase>& pSource, |
| uint8_t** dest_buf, |
| size_t* dest_size) { |
| struct jpeg_error_mgr jerr; |
| jerr.error_exit = _error_do_nothing; |
| jerr.emit_message = _error_do_nothing1; |
| jerr.output_message = _error_do_nothing; |
| jerr.format_message = _error_do_nothing2; |
| jerr.reset_error_mgr = _error_do_nothing; |
| |
| struct jpeg_compress_struct cinfo; |
| memset(&cinfo, 0, sizeof(cinfo)); |
| cinfo.err = &jerr; |
| jpeg_create_compress(&cinfo); |
| int Bpp = pSource->GetBPP() / 8; |
| uint32_t nComponents = Bpp >= 3 ? (pSource->IsCmykImage() ? 4 : 3) : 1; |
| uint32_t pitch = pSource->GetPitch(); |
| uint32_t width = pdfium::base::checked_cast<uint32_t>(pSource->GetWidth()); |
| uint32_t height = pdfium::base::checked_cast<uint32_t>(pSource->GetHeight()); |
| FX_SAFE_UINT32 safe_buf_len = width; |
| safe_buf_len *= height; |
| safe_buf_len *= nComponents; |
| safe_buf_len += 1024; |
| if (!safe_buf_len.IsValid()) |
| return false; |
| |
| uint32_t dest_buf_length = safe_buf_len.ValueOrDie(); |
| *dest_buf = FX_TryAlloc(uint8_t, dest_buf_length); |
| const int MIN_TRY_BUF_LEN = 1024; |
| while (!(*dest_buf) && dest_buf_length > MIN_TRY_BUF_LEN) { |
| dest_buf_length >>= 1; |
| *dest_buf = FX_TryAlloc(uint8_t, dest_buf_length); |
| } |
| if (!(*dest_buf)) |
| return false; |
| |
| struct jpeg_destination_mgr dest; |
| dest.init_destination = _dest_do_nothing; |
| dest.term_destination = _dest_do_nothing; |
| dest.empty_output_buffer = _dest_empty; |
| dest.next_output_byte = *dest_buf; |
| dest.free_in_buffer = dest_buf_length; |
| cinfo.dest = &dest; |
| cinfo.image_width = width; |
| cinfo.image_height = height; |
| cinfo.input_components = nComponents; |
| if (nComponents == 1) { |
| cinfo.in_color_space = JCS_GRAYSCALE; |
| } else if (nComponents == 3) { |
| cinfo.in_color_space = JCS_RGB; |
| } else { |
| cinfo.in_color_space = JCS_CMYK; |
| } |
| uint8_t* line_buf = nullptr; |
| if (nComponents > 1) |
| line_buf = FX_Alloc2D(uint8_t, width, nComponents); |
| |
| jpeg_set_defaults(&cinfo); |
| jpeg_start_compress(&cinfo, TRUE); |
| JSAMPROW row_pointer[1]; |
| JDIMENSION row; |
| while (cinfo.next_scanline < cinfo.image_height) { |
| const uint8_t* src_scan = pSource->GetScanline(cinfo.next_scanline); |
| if (nComponents > 1) { |
| uint8_t* dest_scan = line_buf; |
| if (nComponents == 3) { |
| for (uint32_t i = 0; i < width; i++) { |
| dest_scan[0] = src_scan[2]; |
| dest_scan[1] = src_scan[1]; |
| dest_scan[2] = src_scan[0]; |
| dest_scan += 3; |
| src_scan += Bpp; |
| } |
| } else { |
| for (uint32_t i = 0; i < pitch; i++) { |
| *dest_scan++ = ~*src_scan++; |
| } |
| } |
| row_pointer[0] = line_buf; |
| } else { |
| row_pointer[0] = (uint8_t*)src_scan; |
| } |
| row = cinfo.next_scanline; |
| jpeg_write_scanlines(&cinfo, row_pointer, 1); |
| if (cinfo.next_scanline == row) { |
| *dest_buf = |
| FX_Realloc(uint8_t, *dest_buf, dest_buf_length + JPEG_BLOCK_SIZE); |
| dest.next_output_byte = *dest_buf + dest_buf_length - dest.free_in_buffer; |
| dest_buf_length += JPEG_BLOCK_SIZE; |
| dest.free_in_buffer += JPEG_BLOCK_SIZE; |
| } |
| } |
| jpeg_finish_compress(&cinfo); |
| jpeg_destroy_compress(&cinfo); |
| FX_Free(line_buf); |
| *dest_size = dest_buf_length - static_cast<size_t>(dest.free_in_buffer); |
| |
| return true; |
| } |
| #endif // _FX_PLATFORM_ == _FX_PLATFORM_WINDOWS_ |