72 lines
2.4 KiB
C++
72 lines
2.4 KiB
C++
// Copyright 2014 PDFium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#include "core/fxcodec/gif/gifmodule.h"
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#include "core/fxcodec/cfx_codec_memory.h"
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#include "core/fxcodec/fx_codec.h"
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#include "core/fxcodec/gif/cfx_gif.h"
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#include "core/fxcodec/gif/cfx_gifcontext.h"
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#include "core/fxge/fx_dib.h"
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#include "third_party/base/ptr_util.h"
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namespace fxcodec {
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GifModule::GifModule() = default;
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GifModule::~GifModule() = default;
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std::unique_ptr<ModuleIface::Context> GifModule::Start(Delegate* pDelegate) {
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return pdfium::MakeUnique<CFX_GifContext>(this, pDelegate);
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}
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CFX_GifDecodeStatus GifModule::ReadHeader(Context* pContext,
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int* width,
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int* height,
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int* pal_num,
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CFX_GifPalette** pal_pp,
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int* bg_index) {
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auto* context = static_cast<CFX_GifContext*>(pContext);
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CFX_GifDecodeStatus ret = context->ReadHeader();
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if (ret != CFX_GifDecodeStatus::Success)
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return ret;
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*width = context->width_;
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*height = context->height_;
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*pal_num = (2 << context->global_pal_exp_);
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*pal_pp = context->global_palette_.empty() ? nullptr
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: context->global_palette_.data();
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*bg_index = context->bc_index_;
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return CFX_GifDecodeStatus::Success;
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}
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std::pair<CFX_GifDecodeStatus, size_t> GifModule::LoadFrameInfo(
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Context* pContext) {
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auto* context = static_cast<CFX_GifContext*>(pContext);
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CFX_GifDecodeStatus ret = context->GetFrame();
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if (ret != CFX_GifDecodeStatus::Success)
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return {ret, 0};
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return {CFX_GifDecodeStatus::Success, context->GetFrameNum()};
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}
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CFX_GifDecodeStatus GifModule::LoadFrame(Context* pContext, size_t frame_num) {
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return static_cast<CFX_GifContext*>(pContext)->LoadFrame(frame_num);
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}
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FX_FILESIZE GifModule::GetAvailInput(Context* pContext) const {
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return static_cast<CFX_GifContext*>(pContext)->GetAvailInput();
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}
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bool GifModule::Input(Context* pContext,
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RetainPtr<CFX_CodecMemory> codec_memory,
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CFX_DIBAttribute*) {
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auto* ctx = static_cast<CFX_GifContext*>(pContext);
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ctx->SetInputBuffer(std::move(codec_memory));
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return true;
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}
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} // namespace fxcodec
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