blob: 1b285c4f54c8b61ac2fcfdd75a8782d186d0a26f [file] [log] [blame]
// 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/gif/gif_decoder.h"
#include "core/fxcodec/cfx_codec_memory.h"
#include "core/fxcodec/fx_codec.h"
#include "core/fxcodec/gif/cfx_gifcontext.h"
#include "core/fxge/dib/fx_dib.h"
namespace fxcodec {
// static
std::unique_ptr<ProgressiveDecoderIface::Context> GifDecoder::StartDecode(
Delegate* pDelegate) {
return std::make_unique<CFX_GifContext>(pDelegate);
}
// static
GifDecoder::Status GifDecoder::ReadHeader(
ProgressiveDecoderIface::Context* pContext,
int* width,
int* height,
int* pal_num,
CFX_GifPalette** pal_pp,
int* bg_index) {
auto* context = static_cast<CFX_GifContext*>(pContext);
Status ret = context->ReadHeader();
if (ret != Status::kSuccess)
return ret;
*width = context->width_;
*height = context->height_;
*pal_num = (2 << context->global_palette_exp_);
*pal_pp = context->global_palette_.empty() ? nullptr
: context->global_palette_.data();
*bg_index = context->bc_index_;
return Status::kSuccess;
}
// static
std::pair<GifDecoder::Status, size_t> GifDecoder::LoadFrameInfo(
ProgressiveDecoderIface::Context* pContext) {
auto* context = static_cast<CFX_GifContext*>(pContext);
Status ret = context->GetFrame();
if (ret != Status::kSuccess)
return {ret, 0};
return {Status::kSuccess, context->GetFrameNum()};
}
// static
GifDecoder::Status GifDecoder::LoadFrame(
ProgressiveDecoderIface::Context* pContext,
size_t frame_num) {
return static_cast<CFX_GifContext*>(pContext)->LoadFrame(frame_num);
}
// static
FX_FILESIZE GifDecoder::GetAvailInput(
ProgressiveDecoderIface::Context* pContext) {
return static_cast<CFX_GifContext*>(pContext)->GetAvailInput();
}
// static
bool GifDecoder::Input(ProgressiveDecoderIface::Context* pContext,
RetainPtr<CFX_CodecMemory> codec_memory,
CFX_DIBAttribute*) {
auto* ctx = static_cast<CFX_GifContext*>(pContext);
ctx->SetInputBuffer(std::move(codec_memory));
return true;
}
} // namespace fxcodec