| // 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<CCodec_GifModule::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; |
| } |
| |
| uint32_t CCodec_GifModule::GetAvailInput(Context* pContext, |
| uint8_t** avail_buf_ptr) { |
| auto* context = static_cast<CFX_GifContext*>(pContext); |
| return context->GetAvailInput(avail_buf_ptr); |
| } |
| |
| void CCodec_GifModule::Input(Context* pContext, |
| const uint8_t* src_buf, |
| uint32_t src_size) { |
| auto* context = static_cast<CFX_GifContext*>(pContext); |
| context->SetInputBuffer((uint8_t*)src_buf, src_size); |
| } |