Merge XFA to PDFium master at 4dc95e7 on 10/28/2014

1 files changed, 176 insertions, 0 deletions

diff --git a/core/src/fxcodec/codec/fx_codec_gif.cpp b/core/src/fxcodec/codec/fx_codec_gif.cpp
new file mode 100644
index 0000000000..1fc708db5c
--- /dev/null
+++ b/core/src/fxcodec/codec/fx_codec_gif.cpp
@@ -0,0 +1,176 @@
+// 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 "../../../include/fxcodec/fx_codec.h"

+#include "../../../include/fxge/fx_dib.h"

+#include "codec_int.h"

+#include "../lgif/fx_gif.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)

+    {

+        if(p != NULL) {

+            FX_Free(p);

+        }

+    }

+};

+static void _gif_error_data(gif_decompress_struct_p gif_ptr, FX_LPCSTR err_msg)

+{

+    FXSYS_strncpy((char*)gif_ptr->err_ptr, err_msg, GIF_MAX_ERROR_SIZE - 1);

+    longjmp(gif_ptr->jmpbuf, 1);

+}

+static FX_LPBYTE _gif_ask_buf_for_pal(gif_decompress_struct_p gif_ptr, FX_INT32 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, FX_DWORD* 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, FX_INT32 row_num, FX_LPBYTE 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 FX_BOOL _gif_get_record_position(gif_decompress_struct_p gif_ptr, FX_DWORD cur_pos,

+                                        FX_INT32 left, FX_INT32 top, FX_INT32 width, FX_INT32 height,

+                                        FX_INT32 pal_num, void* pal_ptr,

+                                        FX_INT32 delay_time, FX_BOOL user_input,

+                                        FX_INT32 trans_index, FX_INT32 disposal_method, FX_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);

+}

+void* CCodec_GifModule::Start(void* pModule)

+{

+    FXGIF_Context* p = (FXGIF_Context*)FX_Alloc(FX_BYTE, sizeof(FXGIF_Context));

+    if (p == NULL) {

+        return NULL;

+    }

+    FXSYS_memset32(p, 0, sizeof(FXGIF_Context));

+    p->m_AllocFunc = _gif_alloc_func;

+    p->m_FreeFunc = _gif_free_func;

+    p->gif_ptr = NULL;

+    p->parent_ptr = (void*)this;

+    p->child_ptr = pModule;

+    p->gif_ptr = _gif_create_decompress();

+    if (p->gif_ptr == NULL) {

+        FX_Free(p);

+        return NULL;

+    }

+    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(void* pContext)

+{

+    FXGIF_Context* p = (FXGIF_Context*)pContext;

+    if(p != NULL) {

+        _gif_destroy_decompress(&p->gif_ptr);

+        p->m_FreeFunc(p);

+    }

+}

+FX_INT32 CCodec_GifModule::ReadHeader(void* pContext, int* width, int* height,

+                                      int* pal_num, void** pal_pp, int* bg_index, CFX_DIBAttribute* pAttribute)

+{

+    FXGIF_Context* p = (FXGIF_Context*)pContext;

+    if(setjmp(p->gif_ptr->jmpbuf)) {

+        return 0;

+    }

+    FX_INT32 ret = _gif_read_header(p->gif_ptr);

+    if (ret != 1) {

+        return ret;

+    }

+    if (pAttribute) {

+    }

+    *width = p->gif_ptr->width;

+    *height = p->gif_ptr->height;

+    *pal_num = p->gif_ptr->global_pal_num;

+    *pal_pp = p->gif_ptr->global_pal_ptr;

+    *bg_index = p->gif_ptr->bc_index;

+    return 1;

+}

+FX_INT32 CCodec_GifModule::LoadFrameInfo(void* pContext, int* frame_num)

+{

+    FXGIF_Context* p = (FXGIF_Context*)pContext;

+    if(setjmp(p->gif_ptr->jmpbuf)) {

+        return 0;

+    }

+    FX_INT32 ret = _gif_get_frame(p->gif_ptr);

+    if (ret != 1) {

+        return ret;

+    }

+    *frame_num = _gif_get_frame_num(p->gif_ptr);

+    return 1;

+}

+FX_INT32 CCodec_GifModule::LoadFrame(void* pContext, int frame_num, CFX_DIBAttribute* pAttribute)

+{

+    FXGIF_Context* p = (FXGIF_Context*)pContext;

+    if(setjmp(p->gif_ptr->jmpbuf)) {

+        return 0;

+    }

+    FX_INT32 ret = _gif_load_frame(p->gif_ptr, frame_num);

+    if (ret == 1) {

+        if (pAttribute) {

+            pAttribute->m_nGifLeft = p->gif_ptr->img_ptr_arr_ptr->GetAt(frame_num)->image_info_ptr->left;

+            pAttribute->m_nGifTop = p->gif_ptr->img_ptr_arr_ptr->GetAt(frame_num)->image_info_ptr->top;

+            pAttribute->m_fAspectRatio = p->gif_ptr->pixel_aspect;

+            if (p->gif_ptr->cmt_data_ptr) {

+                FX_LPCBYTE buf = (FX_LPCBYTE)p->gif_ptr->cmt_data_ptr->GetBuffer(0);

+                FX_DWORD len = p->gif_ptr->cmt_data_ptr->GetLength();

+                if (len > 21) {

+                    FX_BYTE size = *buf++;

+                    if (size) {

+                        pAttribute->m_strAuthor = CFX_ByteString(buf, size);

+                    } else {

+                        pAttribute->m_strAuthor.Empty();

+                    }

+                    buf += size;

+                    size = *buf++;

+                    if (size == 20) {

+                        FXSYS_memcpy32(pAttribute->m_strTime, buf, size);

+                    }

+                }

+            }

+        }

+    }

+    return ret;

+}

+FX_DWORD CCodec_GifModule::GetAvailInput(void* pContext, FX_LPBYTE* avial_buf_ptr)

+{

+    FXGIF_Context* p = (FXGIF_Context*)pContext;

+    return _gif_get_avail_input(p->gif_ptr, avial_buf_ptr);

+}

+void CCodec_GifModule::Input(void* pContext, FX_LPCBYTE src_buf, FX_DWORD src_size)

+{

+    FXGIF_Context* p = (FXGIF_Context*)pContext;

+    _gif_input_buffer(p->gif_ptr, (FX_LPBYTE)src_buf, src_size);

+}