// 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/include/fxcodec/fx_codec.h" | |
#include "core/include/fxge/fx_dib.h" | |
#include "codec_int.h" | |
#include "core/src/fxcodec/lbmp/fx_bmp.h" | |
struct FXBMP_Context { | |
bmp_decompress_struct_p bmp_ptr; | |
void* parent_ptr; | |
void* child_ptr; | |
void* (*m_AllocFunc)(unsigned int); | |
void (*m_FreeFunc)(void*); | |
}; | |
extern "C" { | |
static void* _bmp_alloc_func(unsigned int size) { | |
return FX_Alloc(char, size); | |
} | |
static void _bmp_free_func(void* p) { | |
if (p != NULL) { | |
FX_Free(p); | |
} | |
} | |
}; | |
static void _bmp_error_data(bmp_decompress_struct_p bmp_ptr, | |
const FX_CHAR* err_msg) { | |
FXSYS_strncpy((char*)bmp_ptr->err_ptr, err_msg, BMP_MAX_ERROR_SIZE - 1); | |
longjmp(bmp_ptr->jmpbuf, 1); | |
} | |
static void _bmp_read_scanline(bmp_decompress_struct_p bmp_ptr, | |
int32_t row_num, | |
uint8_t* row_buf) { | |
FXBMP_Context* p = (FXBMP_Context*)bmp_ptr->context_ptr; | |
CCodec_BmpModule* pModule = (CCodec_BmpModule*)p->parent_ptr; | |
pModule->ReadScanlineCallback(p->child_ptr, row_num, row_buf); | |
} | |
static FX_BOOL _bmp_get_data_position(bmp_decompress_struct_p bmp_ptr, | |
FX_DWORD rcd_pos) { | |
FXBMP_Context* p = (FXBMP_Context*)bmp_ptr->context_ptr; | |
CCodec_BmpModule* pModule = (CCodec_BmpModule*)p->parent_ptr; | |
return pModule->InputImagePositionBufCallback(p->child_ptr, rcd_pos); | |
} | |
void* CCodec_BmpModule::Start(void* pModule) { | |
FXBMP_Context* p = (FXBMP_Context*)FX_Alloc(uint8_t, sizeof(FXBMP_Context)); | |
if (p == NULL) { | |
return NULL; | |
} | |
FXSYS_memset(p, 0, sizeof(FXBMP_Context)); | |
if (p == NULL) { | |
return NULL; | |
} | |
p->m_AllocFunc = _bmp_alloc_func; | |
p->m_FreeFunc = _bmp_free_func; | |
p->bmp_ptr = NULL; | |
p->parent_ptr = (void*)this; | |
p->child_ptr = pModule; | |
p->bmp_ptr = _bmp_create_decompress(); | |
if (p->bmp_ptr == NULL) { | |
FX_Free(p); | |
return NULL; | |
} | |
p->bmp_ptr->context_ptr = (void*)p; | |
p->bmp_ptr->err_ptr = m_szLastError; | |
p->bmp_ptr->_bmp_error_fn = _bmp_error_data; | |
p->bmp_ptr->_bmp_get_row_fn = _bmp_read_scanline; | |
p->bmp_ptr->_bmp_get_data_position_fn = _bmp_get_data_position; | |
return p; | |
} | |
void CCodec_BmpModule::Finish(void* pContext) { | |
FXBMP_Context* p = (FXBMP_Context*)pContext; | |
if (p != NULL) { | |
_bmp_destroy_decompress(&p->bmp_ptr); | |
p->m_FreeFunc(p); | |
} | |
} | |
int32_t CCodec_BmpModule::ReadHeader(void* pContext, | |
int32_t* width, | |
int32_t* height, | |
FX_BOOL* tb_flag, | |
int32_t* components, | |
int32_t* pal_num, | |
FX_DWORD** pal_pp, | |
CFX_DIBAttribute* pAttribute) { | |
FXBMP_Context* p = (FXBMP_Context*)pContext; | |
if (setjmp(p->bmp_ptr->jmpbuf)) { | |
return 0; | |
} | |
int32_t ret = _bmp_read_header(p->bmp_ptr); | |
if (ret != 1) { | |
return ret; | |
} | |
*width = p->bmp_ptr->width; | |
*height = p->bmp_ptr->height; | |
*tb_flag = p->bmp_ptr->imgTB_flag; | |
*components = p->bmp_ptr->components; | |
*pal_num = p->bmp_ptr->pal_num; | |
*pal_pp = p->bmp_ptr->pal_ptr; | |
if (pAttribute) { | |
pAttribute->m_wDPIUnit = FXCODEC_RESUNIT_METER; | |
pAttribute->m_nXDPI = p->bmp_ptr->dpi_x; | |
pAttribute->m_nYDPI = p->bmp_ptr->dpi_y; | |
pAttribute->m_nBmpCompressType = p->bmp_ptr->compress_flag; | |
} | |
return 1; | |
} | |
int32_t CCodec_BmpModule::LoadImage(void* pContext) { | |
FXBMP_Context* p = (FXBMP_Context*)pContext; | |
if (setjmp(p->bmp_ptr->jmpbuf)) { | |
return 0; | |
} | |
return _bmp_decode_image(p->bmp_ptr); | |
} | |
FX_DWORD CCodec_BmpModule::GetAvailInput(void* pContext, | |
uint8_t** avial_buf_ptr) { | |
FXBMP_Context* p = (FXBMP_Context*)pContext; | |
return _bmp_get_avail_input(p->bmp_ptr, avial_buf_ptr); | |
} | |
void CCodec_BmpModule::Input(void* pContext, | |
const uint8_t* src_buf, | |
FX_DWORD src_size) { | |
FXBMP_Context* p = (FXBMP_Context*)pContext; | |
_bmp_input_buffer(p->bmp_ptr, (uint8_t*)src_buf, src_size); | |
} |