Merge FXGIF_Context and CGifDecompressor into CGifContextchromium/3098

Change-Id: I60c9cbd83ff9e7a30a5a570a6ad1cf8f52360c07
Reviewed-on: https://pdfium-review.googlesource.com/5410
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Nicolás Peña <npm@chromium.org>

1 files changed, 64 insertions, 0 deletions

diff --git a/core/fxcodec/lgif/cgifcontext.cpp b/core/fxcodec/lgif/cgifcontext.cpp
new file mode 100644
index 0000000000..aa2aba6075
--- /dev/null
+++ b/core/fxcodec/lgif/cgifcontext.cpp
@@ -0,0 +1,64 @@
+// Copyright 2017 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/lgif/cgifcontext.h"
+
+#include <utility>
+
+#include "core/fxcodec/codec/ccodec_gifmodule.h"
+#include "core/fxcodec/lgif/fx_gif.h"
+#include "third_party/base/ptr_util.h"
+#include "third_party/base/stl_util.h"
+
+CGifContext::CGifContext(CCodec_GifModule* gif_module, char* error_string)
+    : global_pal_num(0),
+      img_row_offset(0),
+      img_row_avail_size(0),
+      avail_in(0),
+      decode_status(GIF_D_STATUS_SIG),
+      skip_size(0),
+      m_Module(gif_module),
+      err_ptr(error_string),
+      next_in(nullptr),
+      width(0),
+      height(0),
+      bc_index(0),
+      pixel_aspect(0),
+      global_sort_flag(0),
+      global_color_resolution(0),
+      img_pass_num(0) {}
+
+CGifContext::~CGifContext() {}
+
+void CGifContext::ErrorData(const char* err_msg) {
+  strncpy(err_ptr, err_msg, GIF_MAX_ERROR_SIZE - 1);
+  longjmp(jmpbuf, 1);
+}
+
+void CGifContext::RecordCurrentPosition(uint32_t* cur_pos_ptr) {
+  m_Module->GetDelegate()->GifRecordCurrentPosition(*cur_pos_ptr);
+}
+
+void CGifContext::ReadScanline(int32_t row_num, uint8_t* row_buf) {
+  m_Module->GetDelegate()->GifReadScanline(row_num, row_buf);
+}
+
+bool CGifContext::GetRecordPosition(uint32_t cur_pos,
+                                    int32_t left,
+                                    int32_t top,
+                                    int32_t width,
+                                    int32_t height,
+                                    int32_t pal_num,
+                                    GifPalette* pal_ptr,
+                                    int32_t delay_time,
+                                    bool user_input,
+                                    int32_t trans_index,
+                                    int32_t disposal_method,
+                                    bool interlace) {
+  return m_Module->GetDelegate()->GifInputRecordPositionBuf(
+      cur_pos, FX_RECT(left, top, left + width, top + height), pal_num, pal_ptr,
+      delay_time, user_input, trans_index, disposal_method, interlace);
+}