diff options
Diffstat (limited to 'core/fxcodec/codec/ccodec_gifmodule.cpp')
| -rw-r--r-- | core/fxcodec/codec/ccodec_gifmodule.cpp | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/core/fxcodec/codec/ccodec_gifmodule.cpp b/core/fxcodec/codec/ccodec_gifmodule.cpp new file mode 100644 index 0000000000..e3b2648c43 --- /dev/null +++ b/core/fxcodec/codec/ccodec_gifmodule.cpp @@ -0,0 +1,189 @@ +// 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/lgif/fx_gif.h" +#include "core/fxge/fx_dib.h" + +struct FXGIF_Context { + gif_decompress_struct_p gif_ptr; + void* parent_ptr; + void* child_ptr; + + void* (*m_AllocFunc)(unsigned int); + void (*m_FreeFunc)(void*); +}; +extern "C" { +static void* gif_alloc_func(unsigned int size) { + return FX_Alloc(char, size); +} +static void gif_free_func(void* p) { + FX_Free(p); +} +}; +static void gif_error_data(gif_decompress_struct_p gif_ptr, + const FX_CHAR* err_msg) { + FXSYS_strncpy((char*)gif_ptr->err_ptr, err_msg, GIF_MAX_ERROR_SIZE - 1); + longjmp(gif_ptr->jmpbuf, 1); +} +static uint8_t* gif_ask_buf_for_pal(gif_decompress_struct_p gif_ptr, + int32_t pal_size) { + FXGIF_Context* p = (FXGIF_Context*)gif_ptr->context_ptr; + CCodec_GifModule* pModule = (CCodec_GifModule*)p->parent_ptr; + return pModule->AskLocalPaletteBufCallback( + p->child_ptr, gif_get_frame_num(gif_ptr), pal_size); +} +static void gif_record_current_position(gif_decompress_struct_p gif_ptr, + uint32_t* cur_pos_ptr) { + FXGIF_Context* p = (FXGIF_Context*)gif_ptr->context_ptr; + CCodec_GifModule* pModule = (CCodec_GifModule*)p->parent_ptr; + pModule->RecordCurrentPositionCallback(p->child_ptr, *cur_pos_ptr); +} +static void gif_read_scanline(gif_decompress_struct_p gif_ptr, + int32_t row_num, + uint8_t* row_buf) { + FXGIF_Context* p = (FXGIF_Context*)gif_ptr->context_ptr; + CCodec_GifModule* pModule = (CCodec_GifModule*)p->parent_ptr; + pModule->ReadScanlineCallback(p->child_ptr, row_num, row_buf); +} +static bool gif_get_record_position(gif_decompress_struct_p gif_ptr, + uint32_t cur_pos, + int32_t left, + int32_t top, + int32_t width, + int32_t height, + int32_t pal_num, + void* pal_ptr, + int32_t delay_time, + bool user_input, + int32_t trans_index, + int32_t disposal_method, + bool interlace) { + FXGIF_Context* p = (FXGIF_Context*)gif_ptr->context_ptr; + CCodec_GifModule* pModule = (CCodec_GifModule*)p->parent_ptr; + return pModule->InputRecordPositionBufCallback( + p->child_ptr, cur_pos, FX_RECT(left, top, left + width, top + height), + pal_num, pal_ptr, delay_time, user_input, trans_index, disposal_method, + interlace); +} + +FXGIF_Context* CCodec_GifModule::Start(void* pModule) { + FXGIF_Context* p = FX_Alloc(FXGIF_Context, 1); + if (!p) + return nullptr; + + FXSYS_memset(p, 0, sizeof(FXGIF_Context)); + p->m_AllocFunc = gif_alloc_func; + p->m_FreeFunc = gif_free_func; + p->gif_ptr = nullptr; + p->parent_ptr = (void*)this; + p->child_ptr = pModule; + p->gif_ptr = gif_create_decompress(); + if (!p->gif_ptr) { + FX_Free(p); + return nullptr; + } + p->gif_ptr->context_ptr = (void*)p; + p->gif_ptr->err_ptr = m_szLastError; + p->gif_ptr->gif_error_fn = gif_error_data; + p->gif_ptr->gif_ask_buf_for_pal_fn = gif_ask_buf_for_pal; + p->gif_ptr->gif_record_current_position_fn = gif_record_current_position; + p->gif_ptr->gif_get_row_fn = gif_read_scanline; + p->gif_ptr->gif_get_record_position_fn = gif_get_record_position; + return p; +} + +void CCodec_GifModule::Finish(FXGIF_Context* ctx) { + if (ctx) { + gif_destroy_decompress(&ctx->gif_ptr); + ctx->m_FreeFunc(ctx); + } +} + +int32_t CCodec_GifModule::ReadHeader(FXGIF_Context* ctx, + int* width, + int* height, + int* pal_num, + void** pal_pp, + int* bg_index, + CFX_DIBAttribute* pAttribute) { + if (setjmp(ctx->gif_ptr->jmpbuf)) + return 0; + + int32_t ret = gif_read_header(ctx->gif_ptr); + if (ret != 1) + return ret; + + *width = ctx->gif_ptr->width; + *height = ctx->gif_ptr->height; + *pal_num = ctx->gif_ptr->global_pal_num; + *pal_pp = ctx->gif_ptr->global_pal_ptr; + *bg_index = ctx->gif_ptr->bc_index; + return 1; +} + +int32_t CCodec_GifModule::LoadFrameInfo(FXGIF_Context* ctx, int* frame_num) { + if (setjmp(ctx->gif_ptr->jmpbuf)) + return 0; + + int32_t ret = gif_get_frame(ctx->gif_ptr); + if (ret != 1) + return ret; + + *frame_num = gif_get_frame_num(ctx->gif_ptr); + return 1; +} + +int32_t CCodec_GifModule::LoadFrame(FXGIF_Context* ctx, + int frame_num, + CFX_DIBAttribute* pAttribute) { + if (setjmp(ctx->gif_ptr->jmpbuf)) + return 0; + + int32_t ret = gif_load_frame(ctx->gif_ptr, frame_num); + if (ret == 1) { + if (pAttribute) { + pAttribute->m_nGifLeft = + (*ctx->gif_ptr->img_ptr_arr_ptr)[frame_num]->image_info_ptr->left; + pAttribute->m_nGifTop = + (*ctx->gif_ptr->img_ptr_arr_ptr)[frame_num]->image_info_ptr->top; + pAttribute->m_fAspectRatio = ctx->gif_ptr->pixel_aspect; + if (ctx->gif_ptr->cmt_data_ptr) { + const uint8_t* buf = + (const uint8_t*)ctx->gif_ptr->cmt_data_ptr->GetBuffer(0); + uint32_t len = ctx->gif_ptr->cmt_data_ptr->GetLength(); + if (len > 21) { + uint8_t size = *buf++; + if (size) { + pAttribute->m_strAuthor = CFX_ByteString(buf, size); + } else { + pAttribute->m_strAuthor.clear(); + } + buf += size; + size = *buf++; + if (size == 20) { + FXSYS_memcpy(pAttribute->m_strTime, buf, size); + } + } + } + } + } + return ret; +} + +uint32_t CCodec_GifModule::GetAvailInput(FXGIF_Context* ctx, + uint8_t** avail_buf_ptr) { + return gif_get_avail_input(ctx->gif_ptr, avail_buf_ptr); +} + +void CCodec_GifModule::Input(FXGIF_Context* ctx, + const uint8_t* src_buf, + uint32_t src_size) { + gif_input_buffer(ctx->gif_ptr, (uint8_t*)src_buf, src_size); +} |