diff options
| -rw-r--r-- | BUILD.gn | 3 | ||||
| -rw-r--r-- | core/src/fpdfapi/fpdf_render/fpdf_render_loadimage.cpp | 67 | ||||
| -rw-r--r-- | core/src/fpdfapi/fpdf_render/fpdf_render_loadimage_embeddertest.cpp | 19 | ||||
| -rw-r--r-- | pdfium.gyp | 1 | ||||
| -rw-r--r-- | testing/resources/bug_554151.in | 59 | ||||
| -rw-r--r-- | testing/resources/bug_554151.pdf | 70 |
6 files changed, 189 insertions, 30 deletions
@@ -153,7 +153,7 @@ source_set("test_support") { "testing/fx_string_testhelpers.h", "testing/test_support.cpp", "testing/test_support.h", - "testing/utils/path_service.cpp", + 'testing/utils/path_service.cpp', ] deps = [ "//testing/gmock", @@ -748,6 +748,7 @@ test("pdfium_embeddertests") { "core/src/fpdfapi/fpdf_page/fpdf_page_func_embeddertest.cpp", "core/src/fpdfapi/fpdf_parser/fpdf_parser_decode_embeddertest.cpp", "core/src/fpdfapi/fpdf_parser/fpdf_parser_parser_embeddertest.cpp", + "core/src/fpdfapi/fpdf_render/fpdf_render_load_image_embeddertest.cpp", "core/src/fpdfapi/fpdf_render/fpdf_render_pattern_embeddertest.cpp", "fpdfsdk/src/fpdf_dataavail_embeddertest.cpp", "fpdfsdk/src/fpdfdoc_embeddertest.cpp", diff --git a/core/src/fpdfapi/fpdf_render/fpdf_render_loadimage.cpp b/core/src/fpdfapi/fpdf_render/fpdf_render_loadimage.cpp index f6f41d9de1..bdd5e9aa9c 100644 --- a/core/src/fpdfapi/fpdf_render/fpdf_render_loadimage.cpp +++ b/core/src/fpdfapi/fpdf_render/fpdf_render_loadimage.cpp @@ -19,7 +19,9 @@ namespace { -unsigned int _GetBits8(const uint8_t* pData, int bitpos, int nbits) { +unsigned int GetBits8(const uint8_t* pData, uint64_t bitpos, size_t nbits) { + ASSERT(nbits == 1 || nbits == 2 || nbits == 4 || nbits == 8 || nbits == 16); + ASSERT((bitpos & (nbits - 1)) == 0); unsigned int byte = pData[bitpos / 8]; if (nbits == 8) { return byte; @@ -993,11 +995,11 @@ void CPDF_DIBSource::TranslateScanline24bpp(uint8_t* dest_scan, int src_bit_pos = 0; int dest_byte_pos = 0; for (int column = 0; column < m_Width; column++) { - int R = _GetBits8(src_scan, src_bit_pos, m_bpc); + int R = GetBits8(src_scan, src_bit_pos, m_bpc); src_bit_pos += m_bpc; - int G = _GetBits8(src_scan, src_bit_pos, m_bpc); + int G = GetBits8(src_scan, src_bit_pos, m_bpc); src_bit_pos += m_bpc; - int B = _GetBits8(src_scan, src_bit_pos, m_bpc); + int B = GetBits8(src_scan, src_bit_pos, m_bpc); src_bit_pos += m_bpc; R = NORMALCOLOR_MAX(R, max_data); G = NORMALCOLOR_MAX(G, max_data); @@ -1051,7 +1053,7 @@ void CPDF_DIBSource::TranslateScanline24bpp(uint8_t* dest_scan, int dest_byte_pos = 0; for (int column = 0; column < m_Width; column++) { for (FX_DWORD color = 0; color < m_nComponents; color++) { - int data = _GetBits8(src_scan, src_bit_pos, m_bpc); + int data = GetBits8(src_scan, src_bit_pos, m_bpc); color_values[color] = m_pCompData[color].m_DecodeMin + m_pCompData[color].m_DecodeStep * data; src_bit_pos += m_bpc; @@ -1146,7 +1148,7 @@ const uint8_t* CPDF_DIBSource::GetScanline(int line) const { for (int col = 0; col < m_Width; col++) { int color_index = 0; for (FX_DWORD color = 0; color < m_nComponents; color++) { - int data = _GetBits8(pSrcLine, src_bit_pos, m_bpc); + int data = GetBits8(pSrcLine, src_bit_pos, m_bpc); color_index |= data << (color * m_bpc); src_bit_pos += m_bpc; } @@ -1368,7 +1370,7 @@ void CPDF_DIBSource::DownSampleScanline8Bit(int orig_Bpp, for (FX_DWORD col = 0; col < src_width; col++) { int color_index = 0; for (FX_DWORD color = 0; color < m_nComponents; color++) { - int data = _GetBits8(pSrcLine, src_bit_pos, m_bpc); + int data = GetBits8(pSrcLine, src_bit_pos, m_bpc); color_index |= data << (color * m_bpc); src_bit_pos += m_bpc; } @@ -1431,59 +1433,66 @@ void CPDF_DIBSource::DownSampleScanline32Bit(int orig_Bpp, int clip_width) const { int last_src_x = -1; FX_ARGB last_argb = FXARGB_MAKE(0xFF, 0xFF, 0xFF, 0xFF); - FX_FLOAT orig_Not8Bpp = (FX_FLOAT)m_bpc * (FX_FLOAT)m_nComponents / 8.0f; FX_FLOAT unit_To8Bpc = 255.0f / ((1 << m_bpc) - 1); for (int i = 0; i < clip_width; i++) { int dest_x = clip_left + i; FX_DWORD src_x = (bFlipX ? (dest_width - dest_x - 1) : dest_x) * (int64_t)src_width / dest_width; src_x %= src_width; + + // No need to check for 32-bit overflow, as |src_x| is bounded by + // |src_width| and DownSampleScanline already checked for overflow with the + // pitch calculation. const uint8_t* pSrcPixel = nullptr; + size_t bit_offset = 0; if (m_bpc % 8 == 0) { pSrcPixel = pSrcLine + src_x * orig_Bpp; } else { - pSrcPixel = pSrcLine + (int)(src_x * orig_Not8Bpp); + size_t num_bits = src_x * m_bpc * m_nComponents; + pSrcPixel = pSrcLine + num_bits / 8; + bit_offset = num_bits % 8; } + uint8_t* pDestPixel = dest_scan + i * dest_Bpp; FX_ARGB argb; if (src_x == last_src_x) { argb = last_argb; } else { + CFX_FixedBufGrow<uint8_t, 128> extracted_components(m_nComponents); + if (m_bpc % 8 != 0) { + uint64_t src_bit_pos = bit_offset; + for (FX_DWORD j = 0; j < m_nComponents; ++j) { + extracted_components[j] = static_cast<uint8_t>( + GetBits8(pSrcPixel, src_bit_pos, m_bpc) * unit_To8Bpc); + src_bit_pos += m_bpc; + } + pSrcPixel = extracted_components; + } + if (m_pColorSpace) { - CFX_FixedBufGrow<uint8_t, 128> temp(orig_Bpp); uint8_t color[4]; const FX_BOOL bTransMask = TransMask(); if (m_bDefaultDecode) { - if (m_bpc < 8) { - int src_bit_pos = 0; - if (src_x % 2) { - src_bit_pos = 4; - } - for (FX_DWORD j = 0; j < m_nComponents; ++j) { - temp[j] = (uint8_t)(_GetBits8(pSrcPixel, src_bit_pos, m_bpc) * - unit_To8Bpc); - src_bit_pos += m_bpc; - } - m_pColorSpace->TranslateImageLine(color, temp, 1, 0, 0, bTransMask); - } else { - m_pColorSpace->TranslateImageLine(color, pSrcPixel, 1, 0, 0, - bTransMask); - } + m_pColorSpace->TranslateImageLine(color, pSrcPixel, 1, 0, 0, + bTransMask); } else { for (FX_DWORD j = 0; j < m_nComponents; ++j) { + FX_FLOAT component_value = + static_cast<FX_FLOAT>(extracted_components[j]); int color_value = (int)((m_pCompData[j].m_DecodeMin + - m_pCompData[j].m_DecodeStep * (FX_FLOAT)pSrcPixel[j]) * + m_pCompData[j].m_DecodeStep * component_value) * 255.0f + 0.5f); - temp[j] = + extracted_components[j] = color_value > 255 ? 255 : (color_value < 0 ? 0 : color_value); } - m_pColorSpace->TranslateImageLine(color, temp, 1, 0, 0, bTransMask); + m_pColorSpace->TranslateImageLine(color, extracted_components, 1, 0, + 0, bTransMask); } argb = FXARGB_MAKE(0xFF, color[2], color[1], color[0]); } else { - argb = FXARGB_MAKE(0xFf, pSrcPixel[2], pSrcPixel[1], pSrcPixel[0]); + argb = FXARGB_MAKE(0xFF, pSrcPixel[2], pSrcPixel[1], pSrcPixel[0]); } if (m_bColorKey) { int alpha = 0xFF; diff --git a/core/src/fpdfapi/fpdf_render/fpdf_render_loadimage_embeddertest.cpp b/core/src/fpdfapi/fpdf_render/fpdf_render_loadimage_embeddertest.cpp new file mode 100644 index 0000000000..1633249d0d --- /dev/null +++ b/core/src/fpdfapi/fpdf_render/fpdf_render_loadimage_embeddertest.cpp @@ -0,0 +1,19 @@ +// Copyright 2015 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. + +#include "testing/embedder_test.h" +#include "testing/gtest/include/gtest/gtest.h" + +class FPDFRenderLoadImageEmbeddertest : public EmbedderTest {}; + +TEST_F(FPDFRenderLoadImageEmbeddertest, Bug_554151) { + // Test scanline downsampling with a BitsPerComponent of 4. + // Should not crash. + EXPECT_TRUE(OpenDocument("bug_554151.pdf")); + FPDF_PAGE page = LoadPage(0); + EXPECT_NE(nullptr, page); + FPDF_BITMAP bitmap = RenderPage(page); + FPDFBitmap_Destroy(bitmap); + UnloadPage(page); +} diff --git a/pdfium.gyp b/pdfium.gyp index 33c4e19624..0bf0742f0e 100644 --- a/pdfium.gyp +++ b/pdfium.gyp @@ -746,6 +746,7 @@ 'core/src/fpdfapi/fpdf_page/fpdf_page_func_embeddertest.cpp', 'core/src/fpdfapi/fpdf_parser/fpdf_parser_decode_embeddertest.cpp', 'core/src/fpdfapi/fpdf_parser/fpdf_parser_parser_embeddertest.cpp', + 'core/src/fpdfapi/fpdf_render/fpdf_render_loadimage_embeddertest.cpp', 'core/src/fpdfapi/fpdf_render/fpdf_render_pattern_embeddertest.cpp', 'fpdfsdk/src/fpdf_dataavail_embeddertest.cpp', 'fpdfsdk/src/fpdfdoc_embeddertest.cpp', diff --git a/testing/resources/bug_554151.in b/testing/resources/bug_554151.in new file mode 100644 index 0000000000..3087159f51 --- /dev/null +++ b/testing/resources/bug_554151.in @@ -0,0 +1,59 @@ +{{header}} + +{{object 1 0}} +<< + /Pages 2 0 R +>> +endobj + +{{object 2 0}} +<< + /Kids [ 3 0 R ] +>> +endobj + +{{object 3 0}} +<< + /Contents 6 0 R + /Resources 5 0 R +>> +endobj + +{{object 6 0}} +<<>> +stream +612 0.0 0.0 104000 0 0 cm +/XBad Do +endstream +endobj + +{{object 5 0}} +<< + /XObject << + /XBad 7 0 R + >> +>> +endobj + +{{object 7 0}} +<< + /Type /XObject + /Subtype /Image + /Width 612 + /Height 104000 + /ColorSpace /DeviceRGB + /BitsPerComponent 4 + /Length 0 + /Decode [1.0] +>> +stream +FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF +endobj + +{{xref}} +trailer << + /Root 1 0 R + /Size 8 +>> +{{startxref}} +%%EOF diff --git a/testing/resources/bug_554151.pdf b/testing/resources/bug_554151.pdf new file mode 100644 index 0000000000..fa770a7b37 --- /dev/null +++ b/testing/resources/bug_554151.pdf @@ -0,0 +1,70 @@ +%PDF-1.7 +% ò¤ô + +1 0 obj +<< + /Pages 2 0 R +>> +endobj + +2 0 obj +<< + /Kids [ 3 0 R ] +>> +endobj + +3 0 obj +<< + /Contents 6 0 R + /Resources 5 0 R +>> +endobj + +6 0 obj +<<>> +stream +612 0.0 0.0 104000 0 0 cm +/XBad Do +endstream +endobj + +5 0 obj +<< + /XObject << + /XBad 7 0 R + >> +>> +endobj + +7 0 obj +<< + /Type /XObject + /Subtype /Image + /Width 612 + /Height 104000 + /ColorSpace /DeviceRGB + /BitsPerComponent 4 + /Length 0 + /Decode [1.0] +>> +stream +FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF +endobj + +xref +0 8 +0000000000 65535 f +0000000016 00000 n +0000000053 00000 n +0000000093 00000 n +0000000000 65535 f +0000000225 00000 n +0000000152 00000 n +0000000282 00000 n +trailer << + /Root 1 0 R + /Size 8 +>> +startxref +1370 +%%EOF |