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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_gifmodule.h"
#include "core/fxcodec/codec/codec_int.h"
#include "core/fxcodec/fx_codec.h"
#include "core/fxcodec/gif/cfx_gif.h"
#include "core/fxcodec/gif/cfx_gifcontext.h"
#include "core/fxge/fx_dib.h"
#include "third_party/base/ptr_util.h"
CCodec_GifModule::CCodec_GifModule() {}
CCodec_GifModule::~CCodec_GifModule() {}
std::unique_ptr<CodecModuleIface::Context> CCodec_GifModule::Start(
Delegate* pDelegate) {
return pdfium::MakeUnique<CFX_GifContext>(this, pDelegate);
}
CFX_GifDecodeStatus CCodec_GifModule::ReadHeader(Context* pContext,
int* width,
int* height,
int* pal_num,
CFX_GifPalette** pal_pp,
int* bg_index,
CFX_DIBAttribute* pAttribute) {
auto* context = static_cast<CFX_GifContext*>(pContext);
CFX_GifDecodeStatus ret = context->ReadHeader();
if (ret != CFX_GifDecodeStatus::Success)
return ret;
*width = context->width_;
*height = context->height_;
*pal_num = (2 << context->global_pal_exp_);
*pal_pp = context->global_palette_.empty() ? nullptr
: context->global_palette_.data();
*bg_index = context->bc_index_;
return CFX_GifDecodeStatus::Success;
}
std::pair<CFX_GifDecodeStatus, size_t> CCodec_GifModule::LoadFrameInfo(
Context* pContext) {
auto* context = static_cast<CFX_GifContext*>(pContext);
CFX_GifDecodeStatus ret = context->GetFrame();
if (ret != CFX_GifDecodeStatus::Success)
return {ret, 0};
return {CFX_GifDecodeStatus::Success, context->GetFrameNum()};
}
CFX_GifDecodeStatus CCodec_GifModule::LoadFrame(Context* pContext,
size_t frame_num,
CFX_DIBAttribute* pAttribute) {
auto* context = static_cast<CFX_GifContext*>(pContext);
CFX_GifDecodeStatus ret = context->LoadFrame(frame_num);
if (ret != CFX_GifDecodeStatus::Success)
return ret;
if (pAttribute)
pAttribute->m_fAspectRatio = context->pixel_aspect_;
return CFX_GifDecodeStatus::Success;
}
FX_FILESIZE CCodec_GifModule::GetAvailInput(Context* pContext) const {
return static_cast<CFX_GifContext*>(pContext)->GetAvailInput();
}
bool CCodec_GifModule::Input(Context* pContext,
pdfium::span<uint8_t> src_buf,
CFX_DIBAttribute*) {
static_cast<CFX_GifContext*>(pContext)->SetInputBuffer(src_buf);
return true;
}
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