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authorNicolas Pena <npm@chromium.org>2017-06-22 14:23:52 -0400
committerChromium commit bot <commit-bot@chromium.org>2017-06-22 18:56:36 +0000
commitb32a949d667600cb33e80e1bb8c97a23d96f27d9 (patch)
tree756bd8fa5190925421a88e699f39889be7903ec6 /core/fxcodec/lbmp/fx_bmp.cpp
parent84d8eb9b6fdd2afd43f5970b3544d63aa990d30e (diff)
downloadpdfium-b32a949d667600cb33e80e1bb8c97a23d96f27d9.tar.xz
Continue BMP decoder cleanup
This CL replaces raw pointers with vector and unique_ptr. It also fixes other nits. Change-Id: I45c99c9aa658681ec3f0b48fc4f407b278b250f5 Reviewed-on: https://pdfium-review.googlesource.com/6830 Commit-Queue: Nicolás Peña <npm@chromium.org> Reviewed-by: Lei Zhang <thestig@chromium.org>
Diffstat (limited to 'core/fxcodec/lbmp/fx_bmp.cpp')
-rw-r--r--core/fxcodec/lbmp/fx_bmp.cpp195
1 files changed, 94 insertions, 101 deletions
diff --git a/core/fxcodec/lbmp/fx_bmp.cpp b/core/fxcodec/lbmp/fx_bmp.cpp
index a4b97efbac..989b3a4f84 100644
--- a/core/fxcodec/lbmp/fx_bmp.cpp
+++ b/core/fxcodec/lbmp/fx_bmp.cpp
@@ -9,16 +9,17 @@
#include <algorithm>
#include <limits>
+#include "core/fxcrt/fx_system.h"
+#include "third_party/base/ptr_util.h"
+
+static_assert(sizeof(BmpFileHeader) == 14,
+ "BmpFileHeader should have a size of 14");
+
namespace {
const size_t kBmpCoreHeaderSize = 12;
const size_t kBmpInfoHeaderSize = 40;
-// TODO(thestig): Replace with FXDWORD_GET_LSBFIRST?
-uint32_t GetDWord_LSBFirst(uint8_t* p) {
- return p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
-}
-
uint8_t HalfRoundUp(uint8_t value) {
uint16_t value16 = value;
return static_cast<uint8_t>((value16 + 1) / 2);
@@ -33,8 +34,8 @@ uint16_t GetWord_LSBFirst(uint8_t* p) {
BMPDecompressor::BMPDecompressor()
: err_ptr(nullptr),
context_ptr(nullptr),
- bmp_header_ptr(FX_Alloc(BmpFileHeader, 1)),
- bmp_infoheader_ptr(nullptr),
+ next_in(nullptr),
+ header_offset(0),
width(0),
height(0),
compress_flag(0),
@@ -46,7 +47,6 @@ BMPDecompressor::BMPDecompressor()
imgTB_flag(false),
pal_num(0),
pal_type(0),
- pal_ptr(nullptr),
data_size(0),
img_data_offset(0),
img_ifh_size(0),
@@ -57,15 +57,11 @@ BMPDecompressor::BMPDecompressor()
mask_red(0),
mask_green(0),
mask_blue(0),
- next_in(nullptr),
avail_in(0),
skip_size(0),
decode_status(BMP_D_STATUS_HEADER) {}
-BMPDecompressor::~BMPDecompressor() {
- FX_Free(pal_ptr);
- FX_Free(bmp_header_ptr);
-}
+BMPDecompressor::~BMPDecompressor() {}
void BMPDecompressor::Error(const char* err_msg) {
strncpy(err_ptr, err_msg, BMP_MAX_ERROR_SIZE - 1);
@@ -86,17 +82,19 @@ bool BMPDecompressor::GetDataPosition(uint32_t rcd_pos) {
int32_t BMPDecompressor::ReadHeader() {
uint32_t skip_size_org = skip_size;
if (decode_status == BMP_D_STATUS_HEADER) {
- ASSERT(sizeof(BmpFileHeader) == 14);
- BmpFileHeader* bmp_header_ptr = nullptr;
- if (!ReadData((uint8_t**)&bmp_header_ptr, 14))
+ BmpFileHeader* pBmp_header = nullptr;
+ if (!ReadData(reinterpret_cast<uint8_t**>(&pBmp_header),
+ sizeof(BmpFileHeader))) {
return 2;
+ }
- bmp_header_ptr->bfType =
- GetWord_LSBFirst((uint8_t*)&bmp_header_ptr->bfType);
- bmp_header_ptr->bfOffBits =
- GetDWord_LSBFirst((uint8_t*)&bmp_header_ptr->bfOffBits);
- data_size = GetDWord_LSBFirst((uint8_t*)&bmp_header_ptr->bfSize);
- if (bmp_header_ptr->bfType != BMP_SIGNATURE) {
+ pBmp_header->bfType =
+ GetWord_LSBFirst(reinterpret_cast<uint8_t*>(&pBmp_header->bfType));
+ pBmp_header->bfOffBits = FXDWORD_GET_LSBFIRST(
+ reinterpret_cast<uint8_t*>(&pBmp_header->bfOffBits));
+ data_size =
+ FXDWORD_GET_LSBFIRST(reinterpret_cast<uint8_t*>(&pBmp_header->bfSize));
+ if (pBmp_header->bfType != BMP_SIGNATURE) {
Error("Not A Bmp Image");
NOTREACHED();
}
@@ -104,7 +102,8 @@ int32_t BMPDecompressor::ReadHeader() {
skip_size = skip_size_org;
return 2;
}
- img_ifh_size = GetDWord_LSBFirst(next_in + skip_size);
+ img_ifh_size =
+ FXDWORD_GET_LSBFIRST(static_cast<uint8_t*>(next_in + skip_size));
pal_type = 0;
static_assert(sizeof(BmpCoreHeader) == kBmpCoreHeaderSize,
"BmpCoreHeader has wrong size");
@@ -113,84 +112,71 @@ int32_t BMPDecompressor::ReadHeader() {
switch (img_ifh_size) {
case kBmpCoreHeaderSize: {
pal_type = 1;
- BmpCoreHeaderPtr bmp_core_header_ptr = nullptr;
- if (!ReadData(reinterpret_cast<uint8_t**>(&bmp_core_header_ptr),
+ BmpCoreHeader* pBmp_core_header = nullptr;
+ if (!ReadData(reinterpret_cast<uint8_t**>(&pBmp_core_header),
img_ifh_size)) {
skip_size = skip_size_org;
return 2;
}
width = GetWord_LSBFirst(
- reinterpret_cast<uint8_t*>(&bmp_core_header_ptr->bcWidth));
+ reinterpret_cast<uint8_t*>(&pBmp_core_header->bcWidth));
height = GetWord_LSBFirst(
- reinterpret_cast<uint8_t*>(&bmp_core_header_ptr->bcHeight));
+ reinterpret_cast<uint8_t*>(&pBmp_core_header->bcHeight));
bitCounts = GetWord_LSBFirst(
- reinterpret_cast<uint8_t*>(&bmp_core_header_ptr->bcBitCount));
+ reinterpret_cast<uint8_t*>(&pBmp_core_header->bcBitCount));
compress_flag = BMP_RGB;
imgTB_flag = false;
} break;
case kBmpInfoHeaderSize: {
- BmpInfoHeaderPtr bmp_info_header_ptr = nullptr;
- if (!ReadData((uint8_t**)&bmp_info_header_ptr, img_ifh_size)) {
+ BmpInfoHeader* pBmp_info_header = nullptr;
+ if (!ReadData(reinterpret_cast<uint8_t**>(&pBmp_info_header),
+ img_ifh_size)) {
skip_size = skip_size_org;
return 2;
}
- width = GetDWord_LSBFirst((uint8_t*)&bmp_info_header_ptr->biWidth);
- int32_t signed_height =
- GetDWord_LSBFirst((uint8_t*)&bmp_info_header_ptr->biHeight);
- bitCounts =
- GetWord_LSBFirst((uint8_t*)&bmp_info_header_ptr->biBitCount);
- compress_flag =
- GetDWord_LSBFirst((uint8_t*)&bmp_info_header_ptr->biCompression);
- color_used =
- GetDWord_LSBFirst((uint8_t*)&bmp_info_header_ptr->biClrUsed);
- dpi_x = (int32_t)GetDWord_LSBFirst(
- (uint8_t*)&bmp_info_header_ptr->biXPelsPerMeter);
- dpi_y = (int32_t)GetDWord_LSBFirst(
- (uint8_t*)&bmp_info_header_ptr->biYPelsPerMeter);
- if (signed_height < 0) {
- if (signed_height == std::numeric_limits<int>::min()) {
- Error("Unsupported height");
- NOTREACHED();
- }
- height = -signed_height;
- imgTB_flag = true;
- } else {
- height = signed_height;
- }
+ width = FXDWORD_GET_LSBFIRST(
+ reinterpret_cast<uint8_t*>(&pBmp_info_header->biWidth));
+ int32_t signed_height = FXDWORD_GET_LSBFIRST(
+ reinterpret_cast<uint8_t*>(&pBmp_info_header->biHeight));
+ bitCounts = GetWord_LSBFirst(
+ reinterpret_cast<uint8_t*>(&pBmp_info_header->biBitCount));
+ compress_flag = FXDWORD_GET_LSBFIRST(
+ reinterpret_cast<uint8_t*>(&pBmp_info_header->biCompression));
+ color_used = FXDWORD_GET_LSBFIRST(
+ reinterpret_cast<uint8_t*>(&pBmp_info_header->biClrUsed));
+ dpi_x = static_cast<int32_t>(FXDWORD_GET_LSBFIRST(
+ reinterpret_cast<uint8_t*>(&pBmp_info_header->biXPelsPerMeter)));
+ dpi_y = static_cast<int32_t>(FXDWORD_GET_LSBFIRST(
+ reinterpret_cast<uint8_t*>(&pBmp_info_header->biYPelsPerMeter)));
+ SetHeight(signed_height);
} break;
default: {
if (img_ifh_size >
std::min(kBmpInfoHeaderSize, sizeof(BmpInfoHeader))) {
- BmpInfoHeaderPtr bmp_info_header_ptr = nullptr;
- if (!ReadData((uint8_t**)&bmp_info_header_ptr, img_ifh_size)) {
+ BmpInfoHeader* pBmp_info_header = nullptr;
+ if (!ReadData(reinterpret_cast<uint8_t**>(&pBmp_info_header),
+ img_ifh_size)) {
skip_size = skip_size_org;
return 2;
}
uint16_t biPlanes;
- width = GetDWord_LSBFirst((uint8_t*)&bmp_info_header_ptr->biWidth);
- int32_t signed_height =
- GetDWord_LSBFirst((uint8_t*)&bmp_info_header_ptr->biHeight);
- bitCounts =
- GetWord_LSBFirst((uint8_t*)&bmp_info_header_ptr->biBitCount);
- compress_flag =
- GetDWord_LSBFirst((uint8_t*)&bmp_info_header_ptr->biCompression);
- color_used =
- GetDWord_LSBFirst((uint8_t*)&bmp_info_header_ptr->biClrUsed);
- biPlanes = GetWord_LSBFirst((uint8_t*)&bmp_info_header_ptr->biPlanes);
- dpi_x = GetDWord_LSBFirst(
- (uint8_t*)&bmp_info_header_ptr->biXPelsPerMeter);
- dpi_y = GetDWord_LSBFirst(
- (uint8_t*)&bmp_info_header_ptr->biYPelsPerMeter);
- if (signed_height < 0) {
- if (signed_height == std::numeric_limits<int>::min()) {
- Error("Unsupported height");
- NOTREACHED();
- }
- height = -signed_height;
- imgTB_flag = true;
- } else {
- height = signed_height;
- }
+ width = FXDWORD_GET_LSBFIRST(
+ reinterpret_cast<uint8_t*>(&pBmp_info_header->biWidth));
+ int32_t signed_height = FXDWORD_GET_LSBFIRST(
+ reinterpret_cast<uint8_t*>(&pBmp_info_header->biHeight));
+ bitCounts = GetWord_LSBFirst(
+ reinterpret_cast<uint8_t*>(&pBmp_info_header->biBitCount));
+ compress_flag = FXDWORD_GET_LSBFIRST(
+ reinterpret_cast<uint8_t*>(&pBmp_info_header->biCompression));
+ color_used = FXDWORD_GET_LSBFIRST(
+ reinterpret_cast<uint8_t*>(&pBmp_info_header->biClrUsed));
+ biPlanes = GetWord_LSBFirst(
+ reinterpret_cast<uint8_t*>(&pBmp_info_header->biPlanes));
+ dpi_x = FXDWORD_GET_LSBFIRST(
+ reinterpret_cast<uint8_t*>(&pBmp_info_header->biXPelsPerMeter));
+ dpi_y = FXDWORD_GET_LSBFIRST(
+ reinterpret_cast<uint8_t*>(&pBmp_info_header->biYPelsPerMeter));
+ SetHeight(signed_height);
if (compress_flag == BMP_RGB && biPlanes == 1 && color_used == 0)
break;
}
@@ -208,7 +194,7 @@ int32_t BMPDecompressor::ReadHeader() {
case 8:
case 16:
case 24: {
- if (color_used > ((uint32_t)1) << bitCounts) {
+ if (color_used > 1U << bitCounts) {
Error("The Bmp File Is Corrupt");
NOTREACHED();
}
@@ -255,21 +241,20 @@ int32_t BMPDecompressor::ReadHeader() {
NOTREACHED();
}
uint32_t* mask;
- if (ReadData((uint8_t**)&mask, 3 * sizeof(uint32_t)) == nullptr) {
+ if (ReadData(reinterpret_cast<uint8_t**>(&mask), 3 * sizeof(uint32_t)) ==
+ nullptr) {
skip_size = skip_size_org;
return 2;
}
- mask_red = GetDWord_LSBFirst((uint8_t*)&mask[0]);
- mask_green = GetDWord_LSBFirst((uint8_t*)&mask[1]);
- mask_blue = GetDWord_LSBFirst((uint8_t*)&mask[2]);
+ mask_red = FXDWORD_GET_LSBFIRST(reinterpret_cast<uint8_t*>(&mask[0]));
+ mask_green = FXDWORD_GET_LSBFIRST(reinterpret_cast<uint8_t*>(&mask[1]));
+ mask_blue = FXDWORD_GET_LSBFIRST(reinterpret_cast<uint8_t*>(&mask[2]));
if (mask_red & mask_green || mask_red & mask_blue ||
mask_green & mask_blue) {
Error("The Bitfield Bmp File Is Corrupt");
NOTREACHED();
}
- if (bmp_header_ptr->bfOffBits < 26 + img_ifh_size) {
- bmp_header_ptr->bfOffBits = 26 + img_ifh_size;
- }
+ header_offset = std::max(header_offset, 26 + img_ifh_size);
SaveDecodingStatus(BMP_D_STATUS_DATA_PRE);
return 1;
} else if (bitCounts == 16) {
@@ -280,37 +265,32 @@ int32_t BMPDecompressor::ReadHeader() {
pal_num = 0;
if (bitCounts < 16) {
pal_num = 1 << bitCounts;
- if (color_used != 0) {
+ if (color_used != 0)
pal_num = color_used;
- }
uint8_t* src_pal_ptr = nullptr;
uint32_t src_pal_size = pal_num * (pal_type ? 3 : 4);
- if (ReadData((uint8_t**)&src_pal_ptr, src_pal_size) == nullptr) {
+ if (ReadData(&src_pal_ptr, src_pal_size) == nullptr) {
skip_size = skip_size_org;
return 2;
}
- FX_Free(pal_ptr);
- pal_ptr = FX_Alloc(uint32_t, pal_num);
+ palette.resize(pal_num);
int32_t src_pal_index = 0;
if (pal_type == BMP_PAL_OLD) {
while (src_pal_index < pal_num) {
- pal_ptr[src_pal_index++] = BMP_PAL_ENCODE(
+ palette[src_pal_index++] = BMP_PAL_ENCODE(
0x00, src_pal_ptr[2], src_pal_ptr[1], src_pal_ptr[0]);
src_pal_ptr += 3;
}
} else {
while (src_pal_index < pal_num) {
- pal_ptr[src_pal_index++] = BMP_PAL_ENCODE(
+ palette[src_pal_index++] = BMP_PAL_ENCODE(
src_pal_ptr[3], src_pal_ptr[2], src_pal_ptr[1], src_pal_ptr[0]);
src_pal_ptr += 4;
}
}
}
- if (bmp_header_ptr->bfOffBits <
- 14 + img_ifh_size + pal_num * (pal_type ? 3 : 4)) {
- bmp_header_ptr->bfOffBits =
- 14 + img_ifh_size + pal_num * (pal_type ? 3 : 4);
- }
+ header_offset = std::max(header_offset,
+ 14 + img_ifh_size + pal_num * (pal_type ? 3 : 4));
SaveDecodingStatus(BMP_D_STATUS_DATA_PRE);
}
return 1;
@@ -331,7 +311,7 @@ bool BMPDecompressor::ValidateFlag() const {
int32_t BMPDecompressor::DecodeImage() {
if (decode_status == BMP_D_STATUS_DATA_PRE) {
avail_in = 0;
- if (!GetDataPosition(bmp_header_ptr->bfOffBits)) {
+ if (!GetDataPosition(header_offset)) {
decode_status = BMP_D_STATUS_TAIL;
Error("The Bmp File Is Corrupt, Unexpected Stream Offset");
NOTREACHED();
@@ -406,7 +386,7 @@ int32_t BMPDecompressor::DecodeRGB() {
green_bits -= 8;
red_bits -= 8;
for (uint32_t col = 0; col < width; ++col) {
- *buf = GetWord_LSBFirst((uint8_t*)buf);
+ *buf = GetWord_LSBFirst(reinterpret_cast<uint8_t*>(buf));
out_row_buffer[idx++] =
static_cast<uint8_t>((*buf & mask_blue) << blue_bits);
out_row_buffer[idx++] =
@@ -681,3 +661,16 @@ uint32_t BMPDecompressor::GetAvailInput(uint8_t** avail_buf) {
}
return avail_in;
}
+
+void BMPDecompressor::SetHeight(int32_t signed_height) {
+ if (signed_height >= 0) {
+ height = signed_height;
+ return;
+ }
+ if (signed_height == std::numeric_limits<int>::min()) {
+ Error("Unsupported height");
+ NOTREACHED();
+ }
+ height = -signed_height;
+ imgTB_flag = true;
+}