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// 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"
#include "../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_memset32(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);
}
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