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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/ccodec_bmpmodule.h"
#include "core/fxcodec/codec/codec_int.h"
#include "core/fxcodec/fx_codec.h"
#include "core/fxcodec/lbmp/fx_bmp.h"
#include "core/fxcrt/cfx_unowned_ptr.h"
#include "core/fxge/fx_dib.h"
#include "third_party/base/ptr_util.h"
class CBmpContext : public CCodec_BmpModule::Context {
public:
CBmpContext(bmp_decompress_struct_p pBmp,
CCodec_BmpModule* pModule,
CCodec_BmpModule::Delegate* pDelegate);
~CBmpContext() override;
bmp_decompress_struct_p m_pBmp;
CFX_UnownedPtr<CCodec_BmpModule> const m_pModule;
CFX_UnownedPtr<CCodec_BmpModule::Delegate> const m_pDelegate;
char m_szLastError[256];
};
extern "C" {
static void bmp_error_data(bmp_decompress_struct_p pBmp, const char* err_msg) {
strncpy(pBmp->err_ptr, err_msg, BMP_MAX_ERROR_SIZE - 1);
longjmp(pBmp->jmpbuf, 1);
}
static void bmp_read_scanline(bmp_decompress_struct_p pBmp,
int32_t row_num,
uint8_t* row_buf) {
auto* p = reinterpret_cast<CBmpContext*>(pBmp->context_ptr);
p->m_pDelegate->BmpReadScanline(row_num, row_buf);
}
static bool bmp_get_data_position(bmp_decompress_struct_p pBmp,
uint32_t rcd_pos) {
auto* p = reinterpret_cast<CBmpContext*>(pBmp->context_ptr);
return p->m_pDelegate->BmpInputImagePositionBuf(rcd_pos);
}
} // extern "C"
CBmpContext::CBmpContext(bmp_decompress_struct_p pBmp,
CCodec_BmpModule* pModule,
CCodec_BmpModule::Delegate* pDelegate)
: m_pBmp(pBmp), m_pModule(pModule), m_pDelegate(pDelegate) {
memset(m_szLastError, 0, sizeof(m_szLastError));
}
CBmpContext::~CBmpContext() {
bmp_destroy_decompress(&m_pBmp);
}
CCodec_BmpModule::CCodec_BmpModule() {}
CCodec_BmpModule::~CCodec_BmpModule() {}
std::unique_ptr<CCodec_BmpModule::Context> CCodec_BmpModule::Start(
Delegate* pDelegate) {
bmp_decompress_struct_p pBmp = bmp_create_decompress();
if (!pBmp)
return nullptr;
auto p = pdfium::MakeUnique<CBmpContext>(pBmp, this, pDelegate);
p->m_pBmp->context_ptr = p.get();
p->m_pBmp->err_ptr = p->m_szLastError;
p->m_pBmp->bmp_error_fn = bmp_error_data;
p->m_pBmp->bmp_get_row_fn = bmp_read_scanline;
p->m_pBmp->bmp_get_data_position_fn = bmp_get_data_position;
return p;
}
int32_t CCodec_BmpModule::ReadHeader(Context* pContext,
int32_t* width,
int32_t* height,
bool* tb_flag,
int32_t* components,
int32_t* pal_num,
uint32_t** pal_pp,
CFX_DIBAttribute* pAttribute) {
auto* ctx = static_cast<CBmpContext*>(pContext);
if (setjmp(ctx->m_pBmp->jmpbuf)) {
return 0;
}
int32_t ret = bmp_read_header(ctx->m_pBmp);
if (ret != 1) {
return ret;
}
*width = ctx->m_pBmp->width;
*height = ctx->m_pBmp->height;
*tb_flag = ctx->m_pBmp->imgTB_flag;
*components = ctx->m_pBmp->components;
*pal_num = ctx->m_pBmp->pal_num;
*pal_pp = ctx->m_pBmp->pal_ptr;
if (pAttribute) {
pAttribute->m_wDPIUnit = FXCODEC_RESUNIT_METER;
pAttribute->m_nXDPI = ctx->m_pBmp->dpi_x;
pAttribute->m_nYDPI = ctx->m_pBmp->dpi_y;
pAttribute->m_nBmpCompressType = ctx->m_pBmp->compress_flag;
}
return 1;
}
int32_t CCodec_BmpModule::LoadImage(Context* pContext) {
auto* ctx = static_cast<CBmpContext*>(pContext);
if (setjmp(ctx->m_pBmp->jmpbuf))
return 0;
return bmp_decode_image(ctx->m_pBmp);
}
uint32_t CCodec_BmpModule::GetAvailInput(Context* pContext,
uint8_t** avail_buf_ptr) {
auto* ctx = static_cast<CBmpContext*>(pContext);
return bmp_get_avail_input(ctx->m_pBmp, avail_buf_ptr);
}
void CCodec_BmpModule::Input(Context* pContext,
const uint8_t* src_buf,
uint32_t src_size) {
auto* ctx = static_cast<CBmpContext*>(pContext);
bmp_input_buffer(ctx->m_pBmp, (uint8_t*)src_buf, src_size);
}
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