| // 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_tiffmodule.h" |
| |
| #include <limits> |
| |
| #include "core/fxcodec/codec/codec_int.h" |
| #include "core/fxcodec/fx_codec.h" |
| #include "core/fxcrt/cfx_retain_ptr.h" |
| #include "core/fxcrt/fx_safe_types.h" |
| #include "core/fxge/fx_dib.h" |
| #include "third_party/base/ptr_util.h" |
| |
| extern "C" { |
| #include "third_party/libtiff/tiffiop.h" |
| } |
| |
| class CCodec_TiffContext { |
| public: |
| CCodec_TiffContext(); |
| ~CCodec_TiffContext(); |
| |
| bool InitDecoder(const CFX_RetainPtr<IFX_SeekableReadStream>& file_ptr); |
| bool LoadFrameInfo(int32_t frame, |
| int32_t* width, |
| int32_t* height, |
| int32_t* comps, |
| int32_t* bpc, |
| CFX_DIBAttribute* pAttribute); |
| bool Decode(CFX_DIBitmap* pDIBitmap); |
| |
| CFX_RetainPtr<IFX_SeekableReadStream> io_in() const { return m_io_in; } |
| uint32_t offset() const { return m_offset; } |
| void set_offset(uint32_t offset) { m_offset = offset; } |
| |
| private: |
| bool IsSupport(const CFX_DIBitmap* pDIBitmap) const; |
| void SetPalette(CFX_DIBitmap* pDIBitmap, uint16_t bps); |
| bool Decode1bppRGB(CFX_DIBitmap* pDIBitmap, |
| int32_t height, |
| int32_t width, |
| uint16_t bps, |
| uint16_t spp); |
| bool Decode8bppRGB(CFX_DIBitmap* pDIBitmap, |
| int32_t height, |
| int32_t width, |
| uint16_t bps, |
| uint16_t spp); |
| bool Decode24bppRGB(CFX_DIBitmap* pDIBitmap, |
| int32_t height, |
| int32_t width, |
| uint16_t bps, |
| uint16_t spp); |
| |
| CFX_RetainPtr<IFX_SeekableReadStream> m_io_in; |
| uint32_t m_offset; |
| TIFF* m_tif_ctx; |
| }; |
| |
| void* _TIFFmalloc(tmsize_t size) { |
| return FXMEM_DefaultAlloc(size, 0); |
| } |
| |
| void _TIFFfree(void* ptr) { |
| FXMEM_DefaultFree(ptr, 0); |
| } |
| |
| void* _TIFFrealloc(void* ptr, tmsize_t size) { |
| return FXMEM_DefaultRealloc(ptr, size, 0); |
| } |
| |
| void _TIFFmemset(void* ptr, int val, tmsize_t size) { |
| FXSYS_memset(ptr, val, (size_t)size); |
| } |
| |
| void _TIFFmemcpy(void* des, const void* src, tmsize_t size) { |
| FXSYS_memcpy(des, src, (size_t)size); |
| } |
| |
| int _TIFFmemcmp(const void* ptr1, const void* ptr2, tmsize_t size) { |
| return FXSYS_memcmp(ptr1, ptr2, (size_t)size); |
| } |
| |
| int _TIFFIfMultiplicationOverflow(tmsize_t op1, tmsize_t op2) { |
| return op1 > std::numeric_limits<tmsize_t>::max() / op2; |
| } |
| |
| TIFFErrorHandler _TIFFwarningHandler = nullptr; |
| TIFFErrorHandler _TIFFerrorHandler = nullptr; |
| |
| namespace { |
| |
| tsize_t tiff_read(thandle_t context, tdata_t buf, tsize_t length) { |
| CCodec_TiffContext* pTiffContext = |
| reinterpret_cast<CCodec_TiffContext*>(context); |
| FX_SAFE_UINT32 increment = pTiffContext->offset(); |
| increment += length; |
| if (!increment.IsValid()) |
| return 0; |
| |
| FX_FILESIZE offset = pTiffContext->offset(); |
| if (!pTiffContext->io_in()->ReadBlock(buf, offset, length)) |
| return 0; |
| |
| pTiffContext->set_offset(increment.ValueOrDie()); |
| if (offset + length > pTiffContext->io_in()->GetSize()) |
| return pTiffContext->io_in()->GetSize() - offset; |
| |
| return length; |
| } |
| |
| tsize_t tiff_write(thandle_t context, tdata_t buf, tsize_t length) { |
| ASSERT(false); |
| return 0; |
| } |
| |
| toff_t tiff_seek(thandle_t context, toff_t offset, int whence) { |
| CCodec_TiffContext* pTiffContext = |
| reinterpret_cast<CCodec_TiffContext*>(context); |
| FX_SAFE_FILESIZE safe_offset = offset; |
| if (!safe_offset.IsValid()) |
| return static_cast<toff_t>(-1); |
| FX_FILESIZE file_offset = safe_offset.ValueOrDie(); |
| |
| switch (whence) { |
| case 0: { |
| if (file_offset > pTiffContext->io_in()->GetSize()) |
| return static_cast<toff_t>(-1); |
| pTiffContext->set_offset(file_offset); |
| return pTiffContext->offset(); |
| } |
| case 1: { |
| FX_SAFE_UINT32 new_increment = pTiffContext->offset(); |
| new_increment += file_offset; |
| if (!new_increment.IsValid()) |
| return static_cast<toff_t>(-1); |
| pTiffContext->set_offset(new_increment.ValueOrDie()); |
| return pTiffContext->offset(); |
| } |
| case 2: { |
| if (pTiffContext->io_in()->GetSize() < file_offset) |
| return static_cast<toff_t>(-1); |
| pTiffContext->set_offset(pTiffContext->io_in()->GetSize() - file_offset); |
| return pTiffContext->offset(); |
| } |
| default: |
| return static_cast<toff_t>(-1); |
| } |
| } |
| |
| int tiff_close(thandle_t context) { |
| return 0; |
| } |
| |
| toff_t tiff_get_size(thandle_t context) { |
| CCodec_TiffContext* pTiffContext = |
| reinterpret_cast<CCodec_TiffContext*>(context); |
| return static_cast<toff_t>(pTiffContext->io_in()->GetSize()); |
| } |
| |
| int tiff_map(thandle_t context, tdata_t*, toff_t*) { |
| return 0; |
| } |
| |
| void tiff_unmap(thandle_t context, tdata_t, toff_t) {} |
| |
| TIFF* tiff_open(void* context, const char* mode) { |
| TIFF* tif = TIFFClientOpen("Tiff Image", mode, (thandle_t)context, tiff_read, |
| tiff_write, tiff_seek, tiff_close, tiff_get_size, |
| tiff_map, tiff_unmap); |
| if (tif) { |
| tif->tif_fd = (int)(intptr_t)context; |
| } |
| return tif; |
| } |
| |
| template <class T> |
| bool Tiff_Exif_GetInfo(TIFF* tif_ctx, ttag_t tag, CFX_DIBAttribute* pAttr) { |
| T val = 0; |
| TIFFGetField(tif_ctx, tag, &val); |
| if (!val) |
| return false; |
| T* ptr = FX_Alloc(T, 1); |
| *ptr = val; |
| pAttr->m_Exif[tag] = (void*)ptr; |
| return true; |
| } |
| |
| void Tiff_Exif_GetStringInfo(TIFF* tif_ctx, |
| ttag_t tag, |
| CFX_DIBAttribute* pAttr) { |
| char* buf = nullptr; |
| TIFFGetField(tif_ctx, tag, &buf); |
| if (!buf) |
| return; |
| FX_STRSIZE size = FXSYS_strlen(buf); |
| uint8_t* ptr = FX_Alloc(uint8_t, size + 1); |
| FXSYS_memcpy(ptr, buf, size); |
| ptr[size] = 0; |
| pAttr->m_Exif[tag] = ptr; |
| } |
| |
| void TiffBGRA2RGBA(uint8_t* pBuf, int32_t pixel, int32_t spp) { |
| for (int32_t n = 0; n < pixel; n++) { |
| uint8_t tmp = pBuf[0]; |
| pBuf[0] = pBuf[2]; |
| pBuf[2] = tmp; |
| pBuf += spp; |
| } |
| } |
| |
| } // namespace |
| |
| CCodec_TiffContext::CCodec_TiffContext() |
| : m_io_in(nullptr), m_offset(0), m_tif_ctx(nullptr) {} |
| |
| CCodec_TiffContext::~CCodec_TiffContext() { |
| if (m_tif_ctx) |
| TIFFClose(m_tif_ctx); |
| } |
| |
| bool CCodec_TiffContext::InitDecoder( |
| const CFX_RetainPtr<IFX_SeekableReadStream>& file_ptr) { |
| m_io_in = file_ptr; |
| m_tif_ctx = tiff_open(this, "r"); |
| return !!m_tif_ctx; |
| } |
| |
| bool CCodec_TiffContext::LoadFrameInfo(int32_t frame, |
| int32_t* width, |
| int32_t* height, |
| int32_t* comps, |
| int32_t* bpc, |
| CFX_DIBAttribute* pAttribute) { |
| if (!TIFFSetDirectory(m_tif_ctx, (uint16)frame)) |
| return false; |
| |
| uint32_t tif_width = 0; |
| uint32_t tif_height = 0; |
| uint16_t tif_comps = 0; |
| uint16_t tif_bpc = 0; |
| uint32_t tif_rps = 0; |
| TIFFGetField(m_tif_ctx, TIFFTAG_IMAGEWIDTH, &tif_width); |
| TIFFGetField(m_tif_ctx, TIFFTAG_IMAGELENGTH, &tif_height); |
| TIFFGetField(m_tif_ctx, TIFFTAG_SAMPLESPERPIXEL, &tif_comps); |
| TIFFGetField(m_tif_ctx, TIFFTAG_BITSPERSAMPLE, &tif_bpc); |
| TIFFGetField(m_tif_ctx, TIFFTAG_ROWSPERSTRIP, &tif_rps); |
| |
| if (pAttribute) { |
| pAttribute->m_wDPIUnit = FXCODEC_RESUNIT_INCH; |
| if (TIFFGetField(m_tif_ctx, TIFFTAG_RESOLUTIONUNIT, |
| &pAttribute->m_wDPIUnit)) { |
| pAttribute->m_wDPIUnit--; |
| } |
| Tiff_Exif_GetInfo<uint16_t>(m_tif_ctx, TIFFTAG_ORIENTATION, pAttribute); |
| if (Tiff_Exif_GetInfo<float>(m_tif_ctx, TIFFTAG_XRESOLUTION, pAttribute)) { |
| void* val = pAttribute->m_Exif[TIFFTAG_XRESOLUTION]; |
| float fDpi = val ? *reinterpret_cast<float*>(val) : 0; |
| pAttribute->m_nXDPI = (int32_t)(fDpi + 0.5f); |
| } |
| if (Tiff_Exif_GetInfo<float>(m_tif_ctx, TIFFTAG_YRESOLUTION, pAttribute)) { |
| void* val = pAttribute->m_Exif[TIFFTAG_YRESOLUTION]; |
| float fDpi = val ? *reinterpret_cast<float*>(val) : 0; |
| pAttribute->m_nYDPI = (int32_t)(fDpi + 0.5f); |
| } |
| Tiff_Exif_GetStringInfo(m_tif_ctx, TIFFTAG_IMAGEDESCRIPTION, pAttribute); |
| Tiff_Exif_GetStringInfo(m_tif_ctx, TIFFTAG_MAKE, pAttribute); |
| Tiff_Exif_GetStringInfo(m_tif_ctx, TIFFTAG_MODEL, pAttribute); |
| } |
| pdfium::base::CheckedNumeric<int32_t> checked_width = tif_width; |
| pdfium::base::CheckedNumeric<int32_t> checked_height = tif_height; |
| if (!checked_width.IsValid() || !checked_height.IsValid()) |
| return false; |
| |
| *width = checked_width.ValueOrDie(); |
| *height = checked_height.ValueOrDie(); |
| *comps = tif_comps; |
| *bpc = tif_bpc; |
| if (tif_rps > tif_height) { |
| tif_rps = tif_height; |
| TIFFSetField(m_tif_ctx, TIFFTAG_ROWSPERSTRIP, tif_rps); |
| } |
| return true; |
| } |
| |
| bool CCodec_TiffContext::IsSupport(const CFX_DIBitmap* pDIBitmap) const { |
| if (TIFFIsTiled(m_tif_ctx)) |
| return false; |
| |
| uint16_t photometric = 0; |
| if (!TIFFGetField(m_tif_ctx, TIFFTAG_PHOTOMETRIC, &photometric)) |
| return false; |
| |
| switch (pDIBitmap->GetBPP()) { |
| case 1: |
| case 8: |
| if (photometric != PHOTOMETRIC_PALETTE) { |
| return false; |
| } |
| break; |
| case 24: |
| if (photometric != PHOTOMETRIC_RGB) { |
| return false; |
| } |
| break; |
| default: |
| return false; |
| } |
| uint16_t planarconfig = 0; |
| if (!TIFFGetFieldDefaulted(m_tif_ctx, TIFFTAG_PLANARCONFIG, &planarconfig)) |
| return false; |
| |
| return planarconfig != PLANARCONFIG_SEPARATE; |
| } |
| |
| void CCodec_TiffContext::SetPalette(CFX_DIBitmap* pDIBitmap, uint16_t bps) { |
| uint16_t* red_orig = nullptr; |
| uint16_t* green_orig = nullptr; |
| uint16_t* blue_orig = nullptr; |
| TIFFGetField(m_tif_ctx, TIFFTAG_COLORMAP, &red_orig, &green_orig, &blue_orig); |
| for (int32_t i = (1L << bps) - 1; i >= 0; i--) { |
| #define CVT(x) ((uint16_t)((x) >> 8)) |
| red_orig[i] = CVT(red_orig[i]); |
| green_orig[i] = CVT(green_orig[i]); |
| blue_orig[i] = CVT(blue_orig[i]); |
| #undef CVT |
| } |
| int32_t len = 1 << bps; |
| for (int32_t index = 0; index < len; index++) { |
| uint32_t r = red_orig[index] & 0xFF; |
| uint32_t g = green_orig[index] & 0xFF; |
| uint32_t b = blue_orig[index] & 0xFF; |
| uint32_t color = (uint32_t)b | ((uint32_t)g << 8) | ((uint32_t)r << 16) | |
| (((uint32)0xffL) << 24); |
| pDIBitmap->SetPaletteEntry(index, color); |
| } |
| } |
| |
| bool CCodec_TiffContext::Decode1bppRGB(CFX_DIBitmap* pDIBitmap, |
| int32_t height, |
| int32_t width, |
| uint16_t bps, |
| uint16_t spp) { |
| if (pDIBitmap->GetBPP() != 1 || spp != 1 || bps != 1 || |
| !IsSupport(pDIBitmap)) { |
| return false; |
| } |
| SetPalette(pDIBitmap, bps); |
| int32_t size = (int32_t)TIFFScanlineSize(m_tif_ctx); |
| uint8_t* buf = (uint8_t*)_TIFFmalloc(size); |
| if (!buf) { |
| TIFFError(TIFFFileName(m_tif_ctx), "No space for scanline buffer"); |
| return false; |
| } |
| uint8_t* bitMapbuffer = (uint8_t*)pDIBitmap->GetBuffer(); |
| uint32_t pitch = pDIBitmap->GetPitch(); |
| for (int32_t row = 0; row < height; row++) { |
| TIFFReadScanline(m_tif_ctx, buf, row, 0); |
| for (int32_t j = 0; j < size; j++) { |
| bitMapbuffer[row * pitch + j] = buf[j]; |
| } |
| } |
| _TIFFfree(buf); |
| return true; |
| } |
| |
| bool CCodec_TiffContext::Decode8bppRGB(CFX_DIBitmap* pDIBitmap, |
| int32_t height, |
| int32_t width, |
| uint16_t bps, |
| uint16_t spp) { |
| if (pDIBitmap->GetBPP() != 8 || spp != 1 || (bps != 4 && bps != 8) || |
| !IsSupport(pDIBitmap)) { |
| return false; |
| } |
| SetPalette(pDIBitmap, bps); |
| int32_t size = (int32_t)TIFFScanlineSize(m_tif_ctx); |
| uint8_t* buf = (uint8_t*)_TIFFmalloc(size); |
| if (!buf) { |
| TIFFError(TIFFFileName(m_tif_ctx), "No space for scanline buffer"); |
| return false; |
| } |
| uint8_t* bitMapbuffer = (uint8_t*)pDIBitmap->GetBuffer(); |
| uint32_t pitch = pDIBitmap->GetPitch(); |
| for (int32_t row = 0; row < height; row++) { |
| TIFFReadScanline(m_tif_ctx, buf, row, 0); |
| for (int32_t j = 0; j < size; j++) { |
| switch (bps) { |
| case 4: |
| bitMapbuffer[row * pitch + 2 * j + 0] = (buf[j] & 0xF0) >> 4; |
| bitMapbuffer[row * pitch + 2 * j + 1] = (buf[j] & 0x0F) >> 0; |
| break; |
| case 8: |
| bitMapbuffer[row * pitch + j] = buf[j]; |
| break; |
| } |
| } |
| } |
| _TIFFfree(buf); |
| return true; |
| } |
| |
| bool CCodec_TiffContext::Decode24bppRGB(CFX_DIBitmap* pDIBitmap, |
| int32_t height, |
| int32_t width, |
| uint16_t bps, |
| uint16_t spp) { |
| if (pDIBitmap->GetBPP() != 24 || !IsSupport(pDIBitmap)) |
| return false; |
| |
| int32_t size = (int32_t)TIFFScanlineSize(m_tif_ctx); |
| uint8_t* buf = (uint8_t*)_TIFFmalloc(size); |
| if (!buf) { |
| TIFFError(TIFFFileName(m_tif_ctx), "No space for scanline buffer"); |
| return false; |
| } |
| uint8_t* bitMapbuffer = (uint8_t*)pDIBitmap->GetBuffer(); |
| uint32_t pitch = pDIBitmap->GetPitch(); |
| for (int32_t row = 0; row < height; row++) { |
| TIFFReadScanline(m_tif_ctx, buf, row, 0); |
| for (int32_t j = 0; j < size - 2; j += 3) { |
| bitMapbuffer[row * pitch + j + 0] = buf[j + 2]; |
| bitMapbuffer[row * pitch + j + 1] = buf[j + 1]; |
| bitMapbuffer[row * pitch + j + 2] = buf[j + 0]; |
| } |
| } |
| _TIFFfree(buf); |
| return true; |
| } |
| |
| bool CCodec_TiffContext::Decode(CFX_DIBitmap* pDIBitmap) { |
| uint32_t img_wid = pDIBitmap->GetWidth(); |
| uint32_t img_hei = pDIBitmap->GetHeight(); |
| uint32_t width = 0; |
| uint32_t height = 0; |
| TIFFGetField(m_tif_ctx, TIFFTAG_IMAGEWIDTH, &width); |
| TIFFGetField(m_tif_ctx, TIFFTAG_IMAGELENGTH, &height); |
| if (img_wid != width || img_hei != height) |
| return false; |
| |
| if (pDIBitmap->GetBPP() == 32) { |
| uint16_t rotation = ORIENTATION_TOPLEFT; |
| TIFFGetField(m_tif_ctx, TIFFTAG_ORIENTATION, &rotation); |
| if (TIFFReadRGBAImageOriented(m_tif_ctx, img_wid, img_hei, |
| (uint32*)pDIBitmap->GetBuffer(), rotation, |
| 1)) { |
| for (uint32_t row = 0; row < img_hei; row++) { |
| uint8_t* row_buf = (uint8_t*)pDIBitmap->GetScanline(row); |
| TiffBGRA2RGBA(row_buf, img_wid, 4); |
| } |
| return true; |
| } |
| } |
| uint16_t spp = 0; |
| uint16_t bps = 0; |
| TIFFGetField(m_tif_ctx, TIFFTAG_SAMPLESPERPIXEL, &spp); |
| TIFFGetField(m_tif_ctx, TIFFTAG_BITSPERSAMPLE, &bps); |
| FX_SAFE_UINT32 safe_bpp = bps; |
| safe_bpp *= spp; |
| if (!safe_bpp.IsValid()) |
| return false; |
| uint32_t bpp = safe_bpp.ValueOrDie(); |
| if (bpp == 1) |
| return Decode1bppRGB(pDIBitmap, height, width, bps, spp); |
| if (bpp <= 8) |
| return Decode8bppRGB(pDIBitmap, height, width, bps, spp); |
| if (bpp <= 24) |
| return Decode24bppRGB(pDIBitmap, height, width, bps, spp); |
| return false; |
| } |
| |
| CCodec_TiffContext* CCodec_TiffModule::CreateDecoder( |
| const CFX_RetainPtr<IFX_SeekableReadStream>& file_ptr) { |
| auto pDecoder = pdfium::MakeUnique<CCodec_TiffContext>(); |
| if (!pDecoder->InitDecoder(file_ptr)) |
| return nullptr; |
| |
| return pDecoder.release(); |
| } |
| |
| bool CCodec_TiffModule::LoadFrameInfo(CCodec_TiffContext* ctx, |
| int32_t frame, |
| int32_t* width, |
| int32_t* height, |
| int32_t* comps, |
| int32_t* bpc, |
| CFX_DIBAttribute* pAttribute) { |
| return ctx->LoadFrameInfo(frame, width, height, comps, bpc, pAttribute); |
| } |
| |
| bool CCodec_TiffModule::Decode(CCodec_TiffContext* ctx, |
| class CFX_DIBitmap* pDIBitmap) { |
| return ctx->Decode(pDIBitmap); |
| } |
| |
| void CCodec_TiffModule::DestroyDecoder(CCodec_TiffContext* ctx) { |
| delete ctx; |
| } |