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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 "core/fxcodec/codec/codec_int.h"
#include "core/fxcodec/fx_codec.h"
#include "core/fxcodec/lbmp/fx_bmp.h"
#include "core/fxge/fx_dib.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) {
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 bool bmp_get_data_position(bmp_decompress_struct_p bmp_ptr,
uint32_t 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);
}
FXBMP_Context* CCodec_BmpModule::Start(void* pModule) {
FXBMP_Context* p = FX_Alloc(FXBMP_Context, 1);
if (!p)
return nullptr;
FXSYS_memset(p, 0, sizeof(FXBMP_Context));
if (!p)
return nullptr;
p->m_AllocFunc = bmp_alloc_func;
p->m_FreeFunc = bmp_free_func;
p->bmp_ptr = nullptr;
p->parent_ptr = (void*)this;
p->child_ptr = pModule;
p->bmp_ptr = bmp_create_decompress();
if (!p->bmp_ptr) {
FX_Free(p);
return nullptr;
}
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(FXBMP_Context* ctx) {
if (ctx) {
bmp_destroy_decompress(&ctx->bmp_ptr);
ctx->m_FreeFunc(ctx);
}
}
int32_t CCodec_BmpModule::ReadHeader(FXBMP_Context* ctx,
int32_t* width,
int32_t* height,
bool* tb_flag,
int32_t* components,
int32_t* pal_num,
uint32_t** pal_pp,
CFX_DIBAttribute* pAttribute) {
if (setjmp(ctx->bmp_ptr->jmpbuf)) {
return 0;
}
int32_t ret = bmp_read_header(ctx->bmp_ptr);
if (ret != 1) {
return ret;
}
*width = ctx->bmp_ptr->width;
*height = ctx->bmp_ptr->height;
*tb_flag = ctx->bmp_ptr->imgTB_flag;
*components = ctx->bmp_ptr->components;
*pal_num = ctx->bmp_ptr->pal_num;
*pal_pp = ctx->bmp_ptr->pal_ptr;
if (pAttribute) {
pAttribute->m_wDPIUnit = FXCODEC_RESUNIT_METER;
pAttribute->m_nXDPI = ctx->bmp_ptr->dpi_x;
pAttribute->m_nYDPI = ctx->bmp_ptr->dpi_y;
pAttribute->m_nBmpCompressType = ctx->bmp_ptr->compress_flag;
}
return 1;
}
int32_t CCodec_BmpModule::LoadImage(FXBMP_Context* ctx) {
if (setjmp(ctx->bmp_ptr->jmpbuf))
return 0;
return bmp_decode_image(ctx->bmp_ptr);
}
uint32_t CCodec_BmpModule::GetAvailInput(FXBMP_Context* ctx,
uint8_t** avail_buf_ptr) {
return bmp_get_avail_input(ctx->bmp_ptr, avail_buf_ptr);
}
void CCodec_BmpModule::Input(FXBMP_Context* ctx,
const uint8_t* src_buf,
uint32_t src_size) {
bmp_input_buffer(ctx->bmp_ptr, (uint8_t*)src_buf, src_size);
}
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