// 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 "../../../include/fxcodec/fx_codec.h" | |
#include "../../../include/fxge/fx_dib.h" | |
#include "codec_int.h" | |
extern "C" { | |
static void _JpegScanSOI(const FX_BYTE*& src_buf, FX_DWORD& src_size) | |
{ | |
if (src_size == 0) { | |
return; | |
} | |
FX_DWORD 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" { | |
#undef FAR | |
#include "../../fx_jpeglib.h" | |
} | |
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_EXIF (JPEG_APP0 + 1) | |
#define JPEG_MARKER_ICC (JPEG_APP0 + 2) | |
#define JPEG_MARKER_AUTHORTIME (JPEG_APP0 + 3) | |
#define JPEG_MARKER_MAXSIZE 0xFFFF | |
#define JPEG_OVERHEAD_LEN 14 | |
static FX_BOOL _JpegIsIccMarker(jpeg_saved_marker_ptr marker) | |
{ | |
if (marker->marker == JPEG_MARKER_ICC && | |
marker->data_length >= JPEG_OVERHEAD_LEN && | |
(FXSYS_memcmp32(marker->data, "\x49\x43\x43\x5f\x50\x52\x4f\x46\x49\x4c\x45\x00", 12) == 0)) { | |
return TRUE; | |
} | |
return FALSE; | |
} | |
static FX_BOOL _JpegLoadIccProfile(j_decompress_ptr cinfo, FX_LPBYTE* icc_buf_ptr, FX_DWORD* icc_length) | |
{ | |
if(icc_buf_ptr == NULL || icc_length == NULL) { | |
return FALSE; | |
} | |
*icc_buf_ptr = NULL; | |
*icc_length = 0; | |
FX_LPBYTE icc_data_ptr = NULL; | |
FX_DWORD icc_data_len = 0; | |
FX_BYTE count_icc_marker = 0; | |
FX_BYTE num_icc_marker = 0; | |
jpeg_saved_marker_ptr marker_list[256] = {NULL}; | |
for (jpeg_saved_marker_ptr cur_marker = cinfo->marker_list; | |
cur_marker != NULL; | |
cur_marker = cur_marker->next) { | |
if(_JpegIsIccMarker(cur_marker)) { | |
if(count_icc_marker == 0) { | |
num_icc_marker = cur_marker->data[13]; | |
} else if(num_icc_marker != cur_marker->data[13]) { | |
return FALSE; | |
} | |
int sn = cur_marker->data[12] - 1; | |
if(sn < 0 || sn >= num_icc_marker) { | |
return FALSE; | |
} | |
if(marker_list[sn] == NULL) { | |
marker_list[sn] = cur_marker; | |
} else { | |
return FALSE; | |
} | |
count_icc_marker ++; | |
icc_data_len += (cur_marker->data_length - JPEG_OVERHEAD_LEN); | |
} | |
} | |
if(count_icc_marker != num_icc_marker) { | |
return FALSE; | |
} | |
if(num_icc_marker == 0) { | |
return TRUE; | |
} | |
icc_data_ptr = FX_Alloc(FX_BYTE, icc_data_len); | |
if(icc_buf_ptr == NULL) { | |
return FALSE; | |
} | |
*icc_buf_ptr = icc_data_ptr; | |
*icc_length = icc_data_len; | |
for (int idx = 0; idx < num_icc_marker; idx++) { | |
icc_data_len = marker_list[idx]->data_length - JPEG_OVERHEAD_LEN; | |
FXSYS_memcpy32(icc_data_ptr, marker_list[idx]->data + JPEG_OVERHEAD_LEN, icc_data_len); | |
icc_data_ptr += icc_data_len; | |
} | |
return TRUE; | |
} | |
static FX_BOOL _JpegEmbedIccProfile(j_compress_ptr cinfo, FX_LPCBYTE icc_buf_ptr, FX_DWORD icc_length) | |
{ | |
if(icc_buf_ptr == NULL || icc_length == 0) { | |
return FALSE; | |
} | |
FX_DWORD icc_segment_size = (JPEG_MARKER_MAXSIZE - 2 - JPEG_OVERHEAD_LEN); | |
FX_DWORD icc_segment_num = (icc_length / icc_segment_size) + 1; | |
if (icc_segment_num > 255) { | |
return FALSE; | |
} | |
FX_DWORD icc_data_length = JPEG_OVERHEAD_LEN + (icc_segment_num > 1 ? icc_segment_size : icc_length); | |
FX_LPBYTE icc_data = FX_Alloc(FX_BYTE, icc_data_length); | |
if (icc_data == NULL) { | |
return FALSE; | |
} | |
FXSYS_memcpy32(icc_data, "\x49\x43\x43\x5f\x50\x52\x4f\x46\x49\x4c\x45\x00", 12); | |
icc_data[13] = (FX_BYTE)icc_segment_num; | |
for (FX_BYTE i = 0; i < (icc_segment_num - 1); i++) { | |
icc_data[12] = i + 1; | |
FXSYS_memcpy32(icc_data + JPEG_OVERHEAD_LEN, icc_buf_ptr + i * icc_segment_size, icc_segment_size); | |
jpeg_write_marker(cinfo, JPEG_MARKER_ICC, icc_data, icc_data_length); | |
} | |
icc_data[12] = (FX_BYTE)icc_segment_num; | |
FX_DWORD icc_size = (icc_segment_num - 1) * icc_segment_size; | |
FXSYS_memcpy32(icc_data + JPEG_OVERHEAD_LEN, icc_buf_ptr + icc_size, icc_length - icc_size); | |
jpeg_write_marker(cinfo, JPEG_MARKER_ICC, icc_data, JPEG_OVERHEAD_LEN + icc_length - icc_size); | |
FX_Free(icc_data); | |
return TRUE; | |
} | |
extern "C" { | |
static void _dest_do_nothing(j_compress_ptr cinfo) {} | |
}; | |
extern "C" { | |
static boolean _dest_empty(j_compress_ptr cinfo) | |
{ | |
return FALSE; | |
} | |
}; | |
#define JPEG_BLOCK_SIZE 1048576 | |
static void _JpegEncode(const CFX_DIBSource* pSource, FX_LPBYTE& dest_buf, FX_STRSIZE& dest_size, int quality, FX_LPCBYTE icc_buf, FX_DWORD icc_length) | |
{ | |
struct jpeg_compress_struct cinfo; | |
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; | |
cinfo.err = &jerr; | |
jpeg_create_compress(&cinfo); | |
int Bpp = pSource->GetBPP() / 8; | |
int nComponents = Bpp >= 3 ? (pSource->IsCmykImage() ? 4 : 3) : 1; | |
int pitch = pSource->GetPitch(); | |
int width = pSource->GetWidth(); | |
int height = pSource->GetHeight(); | |
FX_DWORD dest_buf_length = width * height * nComponents + 1024 + (icc_length ? (icc_length + 255 * 18) : 0); | |
dest_buf = FX_Alloc(FX_BYTE, dest_buf_length); | |
while (dest_buf == NULL) { | |
dest_buf_length >>= 1; | |
dest_buf = FX_Alloc(FX_BYTE, dest_buf_length); | |
} | |
FXSYS_memset32(dest_buf, 0, dest_buf_length); | |
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; | |
} | |
FX_LPBYTE line_buf = NULL; | |
if (nComponents > 1) { | |
line_buf = FX_Alloc(FX_BYTE, width * nComponents); | |
if (line_buf == NULL) { | |
return; | |
} | |
} | |
jpeg_set_defaults(&cinfo); | |
if(quality != 75) { | |
jpeg_set_quality(&cinfo, quality, TRUE); | |
} | |
jpeg_start_compress(&cinfo, TRUE); | |
_JpegEmbedIccProfile(&cinfo, icc_buf, icc_length); | |
JSAMPROW row_pointer[1]; | |
JDIMENSION row; | |
while (cinfo.next_scanline < cinfo.image_height) { | |
FX_LPCBYTE src_scan = pSource->GetScanline(cinfo.next_scanline); | |
if (nComponents > 1) { | |
FX_LPBYTE dest_scan = line_buf; | |
if (nComponents == 3) { | |
for (int 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 (int i = 0; i < pitch; i ++) { | |
*dest_scan++ = ~*src_scan++; | |
} | |
} | |
row_pointer[0] = line_buf; | |
} else { | |
row_pointer[0] = (FX_LPBYTE)src_scan; | |
} | |
row = cinfo.next_scanline; | |
jpeg_write_scanlines(&cinfo, row_pointer, 1); | |
if (cinfo.next_scanline == row) { | |
dest_buf = FX_Realloc(FX_BYTE, dest_buf, dest_buf_length + JPEG_BLOCK_SIZE); | |
if (dest_buf == NULL) { | |
FX_Free(line_buf); | |
return; | |
} | |
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); | |
if (line_buf) { | |
FX_Free(line_buf); | |
} | |
dest_size = dest_buf_length - (FX_STRSIZE)dest.free_in_buffer; | |
} | |
static FX_BOOL _JpegLoadInfo(FX_LPCBYTE src_buf, FX_DWORD src_size, int& width, int& height, | |
int& num_components, int& bits_per_components, FX_BOOL& color_transform, | |
FX_LPBYTE* icc_buf_ptr, FX_DWORD* icc_length) | |
{ | |
_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; | |
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; | |
} | |
if(icc_buf_ptr && icc_length) { | |
jpeg_save_markers(&cinfo, JPEG_MARKER_ICC, JPEG_MARKER_MAXSIZE); | |
} | |
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; | |
if(icc_buf_ptr != NULL) { | |
*icc_buf_ptr = NULL; | |
} | |
if(icc_length != NULL) { | |
*icc_length = 0; | |
} | |
jpeg_destroy_decompress(&cinfo); | |
return TRUE; | |
} | |
class CCodec_JpegDecoder : public CCodec_ScanlineDecoder | |
{ | |
public: | |
CCodec_JpegDecoder(); | |
~CCodec_JpegDecoder(); | |
FX_BOOL Create(FX_LPCBYTE src_buf, FX_DWORD src_size, int width, int height, int nComps, | |
FX_BOOL ColorTransform, IFX_JpegProvider* pJP); | |
virtual void Destroy() | |
{ | |
delete this; | |
} | |
virtual void v_DownScale(int dest_width, int dest_height); | |
virtual FX_BOOL v_Rewind(); | |
virtual FX_LPBYTE v_GetNextLine(); | |
virtual FX_DWORD GetSrcOffset(); | |
jmp_buf m_JmpBuf; | |
struct jpeg_decompress_struct cinfo; | |
struct jpeg_error_mgr jerr; | |
struct jpeg_source_mgr src; | |
FX_LPCBYTE m_SrcBuf; | |
FX_DWORD m_SrcSize; | |
FX_LPBYTE m_pScanlineBuf; | |
FX_BOOL InitDecode(); | |
FX_BOOL m_bInited, m_bStarted, m_bJpegTransform; | |
protected: | |
IFX_JpegProvider* m_pExtProvider; | |
void* m_pExtContext; | |
FX_DWORD m_nDefaultScaleDenom; | |
}; | |
CCodec_JpegDecoder::CCodec_JpegDecoder() | |
{ | |
m_pScanlineBuf = NULL; | |
m_DownScale = 1; | |
m_bStarted = FALSE; | |
m_bInited = FALSE; | |
m_pExtProvider = NULL; | |
m_pExtContext = NULL; | |
FXSYS_memset32(&cinfo, 0, sizeof(cinfo)); | |
FXSYS_memset32(&jerr, 0, sizeof(jerr)); | |
FXSYS_memset32(&src, 0, sizeof(src)); | |
m_nDefaultScaleDenom = 1; | |
} | |
CCodec_JpegDecoder::~CCodec_JpegDecoder() | |
{ | |
if (m_pExtProvider) { | |
m_pExtProvider->DestroyDecoder(m_pExtContext); | |
return; | |
} | |
if (m_pScanlineBuf) { | |
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_OutputHeight; | |
m_nDefaultScaleDenom = cinfo.scale_denom; | |
return TRUE; | |
} | |
FX_BOOL CCodec_JpegDecoder::Create(FX_LPCBYTE src_buf, FX_DWORD src_size, int width, int height, | |
int nComps, FX_BOOL ColorTransform, IFX_JpegProvider* pJP) | |
{ | |
if (pJP) { | |
m_pExtProvider = pJP; | |
m_pExtContext = m_pExtProvider->CreateDecoder(src_buf, src_size, width, height, nComps, ColorTransform); | |
return m_pExtContext != NULL; | |
} | |
_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_memcmp32(src_buf + src_size - 2, "\xFF\xD9", 2) != 0) { | |
((FX_LPBYTE)src_buf)[src_size - 2] = 0xFF; | |
((FX_LPBYTE)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 = (cinfo.image_width * cinfo.num_components + 3) / 4 * 4; | |
m_pScanlineBuf = FX_Alloc(FX_BYTE, m_Pitch); | |
if (m_pScanlineBuf == NULL) { | |
return FALSE; | |
} | |
m_nComps = cinfo.num_components; | |
m_bpc = 8; | |
m_bColorTransformed = FALSE; | |
m_bStarted = FALSE; | |
return TRUE; | |
} | |
extern "C" { | |
FX_INT32 FX_GetDownsampleRatio(FX_INT32 originWidth, FX_INT32 originHeight, FX_INT32 downsampleWidth, FX_INT32 downsampleHeight) | |
{ | |
int iratio_w = originWidth / downsampleWidth; | |
int iratio_h = originHeight / downsampleHeight; | |
int ratio = (iratio_w > iratio_h) ? iratio_h : iratio_w; | |
if (ratio >= 8) { | |
return 8; | |
} else if (ratio >= 4) { | |
return 4; | |
} else if (ratio >= 2) { | |
return 2; | |
} | |
return 1; | |
} | |
} | |
void CCodec_JpegDecoder::v_DownScale(int dest_width, int dest_height) | |
{ | |
if (m_pExtProvider) { | |
m_pExtProvider->DownScale(m_pExtContext, dest_width, dest_height); | |
return; | |
} | |
int old_scale = m_DownScale; | |
m_DownScale = FX_GetDownsampleRatio(m_OrigWidth, m_OrigHeight, dest_width, dest_height); | |
m_OutputWidth = (m_OrigWidth + m_DownScale - 1) / m_DownScale; | |
m_OutputHeight = (m_OrigHeight + m_DownScale - 1) / m_DownScale; | |
m_Pitch = (m_OutputWidth * m_nComps + 3) / 4 * 4; | |
if (old_scale != m_DownScale) { | |
m_NextLine = -1; | |
} | |
} | |
FX_BOOL CCodec_JpegDecoder::v_Rewind() | |
{ | |
if (m_pExtProvider) { | |
return m_pExtProvider->Rewind(m_pExtContext); | |
} | |
if (m_bStarted) { | |
jpeg_destroy_decompress(&cinfo); | |
if (!InitDecode()) { | |
return FALSE; | |
} | |
} | |
if (setjmp(m_JmpBuf) == -1) { | |
return FALSE; | |
} | |
cinfo.scale_denom = m_nDefaultScaleDenom * m_DownScale; | |
m_OutputWidth = (m_OrigWidth + m_DownScale - 1) / m_DownScale; | |
m_OutputHeight = (m_OrigHeight + m_DownScale - 1) / m_DownScale; | |
if (!jpeg_start_decompress(&cinfo)) { | |
jpeg_destroy_decompress(&cinfo); | |
return FALSE; | |
} | |
if ((int)cinfo.output_width > m_OrigWidth) { | |
FXSYS_assert(FALSE); | |
return FALSE; | |
} | |
m_bStarted = TRUE; | |
return TRUE; | |
} | |
FX_LPBYTE CCodec_JpegDecoder::v_GetNextLine() | |
{ | |
if (m_pExtProvider) { | |
return m_pExtProvider->GetNextLine(m_pExtContext); | |
} | |
int nlines = jpeg_read_scanlines(&cinfo, &m_pScanlineBuf, 1); | |
if (nlines < 1) { | |
return NULL; | |
} | |
return m_pScanlineBuf; | |
} | |
FX_DWORD CCodec_JpegDecoder::GetSrcOffset() | |
{ | |
if (m_pExtProvider) { | |
return m_pExtProvider->GetSrcOffset(m_pExtContext); | |
} | |
return (FX_DWORD)(m_SrcSize - src.bytes_in_buffer); | |
} | |
ICodec_ScanlineDecoder* CCodec_JpegModule::CreateDecoder(FX_LPCBYTE src_buf, FX_DWORD src_size, | |
int width, int height, int nComps, FX_BOOL ColorTransform) | |
{ | |
if (src_buf == NULL || src_size == 0) { | |
return NULL; | |
} | |
CCodec_JpegDecoder* pDecoder = FX_NEW CCodec_JpegDecoder; | |
if (pDecoder == NULL) { | |
return NULL; | |
} | |
if (!pDecoder->Create(src_buf, src_size, width, height, nComps, ColorTransform, m_pExtProvider)) { | |
delete pDecoder; | |
return NULL; | |
} | |
return pDecoder; | |
} | |
FX_BOOL CCodec_JpegModule::LoadInfo(FX_LPCBYTE src_buf, FX_DWORD src_size, int& width, int& height, | |
int& num_components, int& bits_per_components, FX_BOOL& color_transform, | |
FX_LPBYTE* icc_buf_ptr, FX_DWORD* icc_length) | |
{ | |
if (m_pExtProvider) { | |
return m_pExtProvider->LoadInfo(src_buf, src_size, width, height, | |
num_components, bits_per_components, color_transform, | |
icc_buf_ptr, icc_length); | |
} | |
return _JpegLoadInfo(src_buf, src_size, width, height, num_components, bits_per_components, color_transform, icc_buf_ptr, icc_length); | |
} | |
FX_BOOL CCodec_JpegModule::Encode(const CFX_DIBSource* pSource, FX_LPBYTE& dest_buf, FX_STRSIZE& dest_size, int quality, FX_LPCBYTE icc_buf, FX_DWORD icc_length) | |
{ | |
if (m_pExtProvider) { | |
return m_pExtProvider->Encode(pSource, dest_buf, dest_size, quality, icc_buf, icc_length); | |
} | |
if(pSource->GetBPP() < 8 || pSource->GetPalette() != NULL) { | |
ASSERT(pSource->GetBPP() >= 8 && pSource->GetPalette() == NULL); | |
return FALSE; | |
} | |
_JpegEncode(pSource, dest_buf, dest_size, quality, icc_buf, icc_length); | |
return TRUE; | |
} | |
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); | |
} | |
void* CCodec_JpegModule::Start() | |
{ | |
if (m_pExtProvider) { | |
return m_pExtProvider->Start(); | |
} | |
FXJPEG_Context* p = (FXJPEG_Context*)FX_Alloc(FX_BYTE, sizeof(FXJPEG_Context)); | |
if (p == NULL) { | |
return NULL; | |
} | |
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(void* pContext) | |
{ | |
if (m_pExtProvider) { | |
m_pExtProvider->Finish(pContext); | |
return; | |
} | |
FXJPEG_Context* p = (FXJPEG_Context*)pContext; | |
jpeg_destroy_decompress(&p->m_Info); | |
p->m_FreeFunc(p); | |
} | |
void CCodec_JpegModule::Input(void* pContext, const unsigned char* src_buf, FX_DWORD src_size) | |
{ | |
if (m_pExtProvider) { | |
m_pExtProvider->Input(pContext, src_buf, src_size); | |
return; | |
} | |
FXJPEG_Context* p = (FXJPEG_Context*)pContext; | |
if (p->m_SkipSize) { | |
if (p->m_SkipSize > src_size) { | |
p->m_SrcMgr.bytes_in_buffer = 0; | |
p->m_SkipSize -= src_size; | |
return; | |
} | |
src_size -= p->m_SkipSize; | |
src_buf += p->m_SkipSize; | |
p->m_SkipSize = 0; | |
} | |
p->m_SrcMgr.next_input_byte = src_buf; | |
p->m_SrcMgr.bytes_in_buffer = src_size; | |
} | |
int CCodec_JpegModule::ReadHeader(void* pContext, int* width, int* height, int* nComps) | |
{ | |
if (m_pExtProvider) { | |
return m_pExtProvider->ReadHeader(pContext, width, height, nComps); | |
} | |
FXJPEG_Context* p = (FXJPEG_Context*)pContext; | |
if (setjmp(p->m_JumpMark) == -1) { | |
return 1; | |
} | |
int ret = jpeg_read_header(&p->m_Info, true); | |
if (ret == JPEG_SUSPENDED) { | |
return 2; | |
} | |
if (ret != JPEG_HEADER_OK) { | |
return 1; | |
} | |
*width = p->m_Info.image_width; | |
*height = p->m_Info.image_height; | |
*nComps = p->m_Info.num_components; | |
return 0; | |
} | |
FX_BOOL CCodec_JpegModule::StartScanline(void* pContext, int down_scale) | |
{ | |
if (m_pExtProvider) { | |
return m_pExtProvider->StartScanline(pContext, down_scale); | |
} | |
FXJPEG_Context* p = (FXJPEG_Context*)pContext; | |
if (setjmp(p->m_JumpMark) == -1) { | |
return FALSE; | |
} | |
p->m_Info.scale_denom = down_scale; | |
return jpeg_start_decompress(&p->m_Info); | |
} | |
FX_BOOL CCodec_JpegModule::ReadScanline(void* pContext, unsigned char* dest_buf) | |
{ | |
if (m_pExtProvider) { | |
return m_pExtProvider->ReadScanline(pContext, dest_buf); | |
} | |
FXJPEG_Context* p = (FXJPEG_Context*)pContext; | |
if (setjmp(p->m_JumpMark) == -1) { | |
return FALSE; | |
} | |
int nlines = jpeg_read_scanlines(&p->m_Info, &dest_buf, 1); | |
return nlines == 1; | |
} | |
FX_DWORD CCodec_JpegModule::GetAvailInput(void* pContext, FX_LPBYTE* avail_buf_ptr) | |
{ | |
if (m_pExtProvider) { | |
return m_pExtProvider->GetAvailInput(pContext, avail_buf_ptr); | |
} | |
if(avail_buf_ptr != NULL) { | |
*avail_buf_ptr = NULL; | |
if(((FXJPEG_Context*)pContext)->m_SrcMgr.bytes_in_buffer > 0) { | |
*avail_buf_ptr = (FX_LPBYTE)((FXJPEG_Context*)pContext)->m_SrcMgr.next_input_byte; | |
} | |
} | |
return (FX_DWORD)((FXJPEG_Context*)pContext)->m_SrcMgr.bytes_in_buffer; | |
} |