| // 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 <setjmp.h> |
| |
| #include "core/fxcodec/codec/codec_int.h" |
| #include "core/fxcodec/include/fx_codec.h" |
| #include "core/fxcrt/include/fx_safe_types.h" |
| #include "core/fxge/include/fx_dib.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" { |
| static void JpegScanSOI(const uint8_t** src_buf, uint32_t* src_size) { |
| if (*src_size == 0) |
| return; |
| |
| uint32_t offset = 0; |
| while (offset < *src_size - 1) { |
| if ((*src_buf)[offset] == 0xff && (*src_buf)[offset + 1] == 0xd8) { |
| *src_buf += offset; |
| *src_size -= offset; |
| return; |
| } |
| offset++; |
| } |
| } |
| }; |
| extern "C" { |
| static void _src_do_nothing(struct jpeg_decompress_struct* cinfo) {} |
| }; |
| extern "C" { |
| static void _error_fatal(j_common_ptr cinfo) { |
| longjmp(*(jmp_buf*)cinfo->client_data, -1); |
| } |
| }; |
| extern "C" { |
| 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; |
| } |
| }; |
| extern "C" { |
| static boolean _src_fill_buffer(j_decompress_ptr cinfo) { |
| return 0; |
| } |
| }; |
| extern "C" { |
| static boolean _src_resync(j_decompress_ptr cinfo, int desired) { |
| return 0; |
| } |
| }; |
| extern "C" { |
| static void _error_do_nothing(j_common_ptr cinfo) {} |
| }; |
| extern "C" { |
| static void _error_do_nothing1(j_common_ptr cinfo, int) {} |
| }; |
| extern "C" { |
| static void _error_do_nothing2(j_common_ptr cinfo, char*) {} |
| }; |
| |
| #define JPEG_MARKER_ICC (JPEG_APP0 + 2) |
| #define JPEG_MARKER_MAXSIZE 0xFFFF |
| |
| #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(const uint8_t* src_buf, |
| uint32_t src_size, |
| int* width, |
| int* height, |
| int* num_components, |
| int* bits_per_components, |
| bool* color_transform) { |
| JpegScanSOI(&src_buf, &src_size); |
| 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_size; |
| src.next_input_byte = src_buf; |
| 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 : public CCodec_ScanlineDecoder { |
| public: |
| CCodec_JpegDecoder(); |
| ~CCodec_JpegDecoder() override; |
| |
| FX_BOOL Create(const uint8_t* src_buf, |
| uint32_t src_size, |
| int width, |
| int height, |
| int nComps, |
| FX_BOOL ColorTransform); |
| |
| // CCodec_ScanlineDecoder |
| FX_BOOL v_Rewind() override; |
| uint8_t* v_GetNextLine() override; |
| uint32_t GetSrcOffset() override; |
| |
| FX_BOOL InitDecode(); |
| |
| jmp_buf m_JmpBuf; |
| struct jpeg_decompress_struct cinfo; |
| struct jpeg_error_mgr jerr; |
| struct jpeg_source_mgr src; |
| const uint8_t* m_SrcBuf; |
| uint32_t m_SrcSize; |
| uint8_t* m_pScanlineBuf; |
| |
| FX_BOOL m_bInited; |
| FX_BOOL m_bStarted; |
| FX_BOOL m_bJpegTransform; |
| |
| protected: |
| uint32_t m_nDefaultScaleDenom; |
| }; |
| |
| CCodec_JpegDecoder::CCodec_JpegDecoder() { |
| m_pScanlineBuf = nullptr; |
| m_bStarted = FALSE; |
| m_bInited = FALSE; |
| FXSYS_memset(&cinfo, 0, sizeof(cinfo)); |
| FXSYS_memset(&jerr, 0, sizeof(jerr)); |
| FXSYS_memset(&src, 0, sizeof(src)); |
| m_nDefaultScaleDenom = 1; |
| } |
| |
| CCodec_JpegDecoder::~CCodec_JpegDecoder() { |
| FX_Free(m_pScanlineBuf); |
| if (m_bInited) |
| jpeg_destroy_decompress(&cinfo); |
| } |
| |
| FX_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_SrcSize; |
| src.next_input_byte = m_SrcBuf; |
| 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; |
| } |
| |
| FX_BOOL CCodec_JpegDecoder::Create(const uint8_t* src_buf, |
| uint32_t src_size, |
| int width, |
| int height, |
| int nComps, |
| FX_BOOL ColorTransform) { |
| JpegScanSOI(&src_buf, &src_size); |
| m_SrcBuf = src_buf; |
| m_SrcSize = src_size; |
| 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 (src_size > 1 && |
| FXSYS_memcmp(src_buf + src_size - 2, "\xFF\xD9", 2) != 0) { |
| ((uint8_t*)src_buf)[src_size - 2] = 0xFF; |
| ((uint8_t*)src_buf)[src_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 = FX_Alloc(uint8_t, m_Pitch); |
| m_nComps = cinfo.num_components; |
| m_bpc = 8; |
| m_bStarted = FALSE; |
| return TRUE; |
| } |
| |
| FX_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) { |
| ASSERT(FALSE); |
| return FALSE; |
| } |
| m_bStarted = TRUE; |
| return TRUE; |
| } |
| |
| uint8_t* CCodec_JpegDecoder::v_GetNextLine() { |
| if (setjmp(m_JmpBuf) == -1) |
| return nullptr; |
| |
| int nlines = jpeg_read_scanlines(&cinfo, &m_pScanlineBuf, 1); |
| return nlines > 0 ? m_pScanlineBuf : nullptr; |
| } |
| |
| uint32_t CCodec_JpegDecoder::GetSrcOffset() { |
| return (uint32_t)(m_SrcSize - src.bytes_in_buffer); |
| } |
| |
| CCodec_ScanlineDecoder* CCodec_JpegModule::CreateDecoder( |
| const uint8_t* src_buf, |
| uint32_t src_size, |
| int width, |
| int height, |
| int nComps, |
| FX_BOOL ColorTransform) { |
| if (!src_buf || src_size == 0) |
| return nullptr; |
| |
| std::unique_ptr<CCodec_JpegDecoder> pDecoder(new CCodec_JpegDecoder); |
| if (!pDecoder->Create(src_buf, src_size, width, height, nComps, |
| ColorTransform)) { |
| return nullptr; |
| } |
| return pDecoder.release(); |
| } |
| |
| bool CCodec_JpegModule::LoadInfo(const uint8_t* src_buf, |
| uint32_t src_size, |
| int* width, |
| int* height, |
| int* num_components, |
| int* bits_per_components, |
| bool* color_transform) { |
| return JpegLoadInfo(src_buf, src_size, width, height, num_components, |
| bits_per_components, color_transform); |
| } |
| |
| struct FXJPEG_Context { |
| 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*); |
| }; |
| extern "C" { |
| static void _error_fatal1(j_common_ptr cinfo) { |
| longjmp(((FXJPEG_Context*)cinfo->client_data)->m_JumpMark, -1); |
| } |
| }; |
| extern "C" { |
| static void _src_skip_data1(struct jpeg_decompress_struct* cinfo, long num) { |
| if (cinfo->src->bytes_in_buffer < (size_t)num) { |
| ((FXJPEG_Context*)cinfo->client_data)->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); |
| } |
| FXJPEG_Context* CCodec_JpegModule::Start() { |
| FXJPEG_Context* p = FX_Alloc(FXJPEG_Context, 1); |
| p->m_AllocFunc = jpeg_alloc_func; |
| p->m_FreeFunc = jpeg_free_func; |
| p->m_ErrMgr.error_exit = _error_fatal1; |
| p->m_ErrMgr.emit_message = _error_do_nothing1; |
| p->m_ErrMgr.output_message = _error_do_nothing; |
| p->m_ErrMgr.format_message = _error_do_nothing2; |
| p->m_ErrMgr.reset_error_mgr = _error_do_nothing; |
| p->m_SrcMgr.init_source = _src_do_nothing; |
| p->m_SrcMgr.term_source = _src_do_nothing; |
| p->m_SrcMgr.skip_input_data = _src_skip_data1; |
| p->m_SrcMgr.fill_input_buffer = _src_fill_buffer; |
| p->m_SrcMgr.resync_to_restart = _src_resync; |
| p->m_Info.client_data = p; |
| p->m_Info.err = &p->m_ErrMgr; |
| if (setjmp(p->m_JumpMark) == -1) { |
| return 0; |
| } |
| jpeg_create_decompress(&p->m_Info); |
| p->m_Info.src = &p->m_SrcMgr; |
| p->m_SkipSize = 0; |
| return p; |
| } |
| |
| void CCodec_JpegModule::Finish(FXJPEG_Context* ctx) { |
| jpeg_destroy_decompress(&ctx->m_Info); |
| ctx->m_FreeFunc(ctx); |
| } |
| |
| void CCodec_JpegModule::Input(FXJPEG_Context* ctx, |
| const unsigned char* src_buf, |
| uint32_t src_size) { |
| if (ctx->m_SkipSize) { |
| if (ctx->m_SkipSize > src_size) { |
| ctx->m_SrcMgr.bytes_in_buffer = 0; |
| ctx->m_SkipSize -= src_size; |
| return; |
| } |
| src_size -= ctx->m_SkipSize; |
| src_buf += ctx->m_SkipSize; |
| ctx->m_SkipSize = 0; |
| } |
| ctx->m_SrcMgr.next_input_byte = src_buf; |
| ctx->m_SrcMgr.bytes_in_buffer = src_size; |
| } |
| |
| #ifdef PDF_ENABLE_XFA |
| int CCodec_JpegModule::ReadHeader(FXJPEG_Context* ctx, |
| int* width, |
| int* height, |
| int* nComps, |
| CFX_DIBAttribute* pAttribute) { |
| #else // PDF_ENABLE_XFA |
| int CCodec_JpegModule::ReadHeader(FXJPEG_Context* ctx, |
| int* width, |
| int* height, |
| int* nComps) { |
| #endif // PDF_ENABLE_XFA |
| if (setjmp(ctx->m_JumpMark) == -1) |
| return 1; |
| |
| 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; |
| #ifdef PDF_ENABLE_XFA |
| JpegLoadAttribute(&ctx->m_Info, pAttribute); |
| #endif |
| return 0; |
| } |
| |
| int CCodec_JpegModule::StartScanline(FXJPEG_Context* ctx, int down_scale) { |
| if (setjmp(ctx->m_JumpMark) == -1) |
| return 0; |
| |
| ctx->m_Info.scale_denom = down_scale; |
| return jpeg_start_decompress(&ctx->m_Info); |
| } |
| |
| FX_BOOL CCodec_JpegModule::ReadScanline(FXJPEG_Context* ctx, |
| unsigned char* dest_buf) { |
| if (setjmp(ctx->m_JumpMark) == -1) |
| return FALSE; |
| |
| int nlines = jpeg_read_scanlines(&ctx->m_Info, &dest_buf, 1); |
| return nlines == 1; |
| } |
| |
| uint32_t CCodec_JpegModule::GetAvailInput(FXJPEG_Context* ctx, |
| uint8_t** avail_buf_ptr) { |
| if (avail_buf_ptr) { |
| *avail_buf_ptr = nullptr; |
| if (ctx->m_SrcMgr.bytes_in_buffer > 0) { |
| *avail_buf_ptr = (uint8_t*)ctx->m_SrcMgr.next_input_byte; |
| } |
| } |
| return (uint32_t)ctx->m_SrcMgr.bytes_in_buffer; |
| } |