From 36a155d1f3a9d9f315655a20d583c13644ef1f3e Mon Sep 17 00:00:00 2001
From: Ryan Harrison <rharrison@chromium.org>
Date: Wed, 27 Sep 2017 15:39:26 -0400
Subject: Cleaning up naming of GIF files/classes/variables

Moved everything from core/fxcodec/lgif to core/fxcodec/gif
Converted CGifContext -> CFX_GifContext
Removed _ptr suffixes from CXF_GifContext
Movef fx_gif.* -> cfx_gif.*
Renamed structs in cfx_gif.h
Renamed members of CFX_GifImage
Renamed members of CFX_GifContext
Renamed CFX_LZWDecoder -> CFX_LZWDecompressor

BUG=pdfium:903

Change-Id: I537e905e935da26832e6bbdc03e0373ed5500bcb
Reviewed-on: https://pdfium-review.googlesource.com/14990
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>
---
 core/fxcodec/gif/cfx_gif.h | 131 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 131 insertions(+)
 create mode 100644 core/fxcodec/gif/cfx_gif.h

(limited to 'core/fxcodec/gif/cfx_gif.h')

diff --git a/core/fxcodec/gif/cfx_gif.h b/core/fxcodec/gif/cfx_gif.h
new file mode 100644
index 0000000000..02a4862017
--- /dev/null
+++ b/core/fxcodec/gif/cfx_gif.h
@@ -0,0 +1,131 @@
+// 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
+
+#ifndef CORE_FXCODEC_GIF_CFX_GIF_H_
+#define CORE_FXCODEC_GIF_CFX_GIF_H_
+
+#include <memory>
+#include <vector>
+
+class CFX_GifContext;
+
+#define GIF_SIGNATURE "GIF"
+#define GIF_SIG_EXTENSION 0x21
+#define GIF_SIG_IMAGE 0x2C
+#define GIF_SIG_TRAILER 0x3B
+#define GIF_BLOCK_GCE 0xF9
+#define GIF_BLOCK_PTE 0x01
+#define GIF_BLOCK_CE 0xFE
+#define GIF_BLOCK_AE 0xFF
+#define GIF_BLOCK_TERMINAL 0x00
+#define GIF_MAX_LZW_EXP 12
+#define GIF_MAX_LZW_CODE 4096
+#define GIF_DATA_BLOCK 255
+#define GIF_MAX_ERROR_SIZE 256
+#define GIF_D_STATUS_SIG 0x01
+#define GIF_D_STATUS_TAIL 0x02
+#define GIF_D_STATUS_EXT 0x03
+#define GIF_D_STATUS_EXT_AE 0x04
+#define GIF_D_STATUS_EXT_CE 0x05
+#define GIF_D_STATUS_EXT_GCE 0x06
+#define GIF_D_STATUS_EXT_PTE 0x07
+#define GIF_D_STATUS_EXT_UNE 0x08
+#define GIF_D_STATUS_IMG_INFO 0x09
+#define GIF_D_STATUS_IMG_DATA 0x0A
+
+#pragma pack(1)
+typedef struct {
+  uint8_t pal_bits : 3;
+  uint8_t sort_flag : 1;
+  uint8_t color_resolution : 3;
+  uint8_t global_pal : 1;
+} CFX_GifGlobalFlags;
+
+typedef struct {
+  uint8_t pal_bits : 3;
+  uint8_t reserved : 2;
+  uint8_t sort_flag : 1;
+  uint8_t interlace : 1;
+  uint8_t local_pal : 1;
+} CFX_GifLocalFlags;
+
+typedef struct {
+  char signature[3];
+  char version[3];
+} CFX_GifHeader;
+
+typedef struct {
+  uint16_t width;
+  uint16_t height;
+  CFX_GifGlobalFlags global_flags;
+  uint8_t bc_index;
+  uint8_t pixel_aspect;
+} CFX_GifLocalScreenDescriptor;
+
+typedef struct {
+  uint16_t left;
+  uint16_t top;
+  uint16_t width;
+  uint16_t height;
+  CFX_GifLocalFlags local_flags;
+} CFX_CFX_GifImageInfo;
+
+typedef struct {
+  uint8_t transparency : 1;
+  uint8_t user_input : 1;
+  uint8_t disposal_method : 3;
+  uint8_t reserved : 3;
+} CFX_GifControlExtensionFlags;
+
+typedef struct {
+  uint8_t block_size;
+  CFX_GifControlExtensionFlags gce_flags;
+  uint16_t delay_time;
+  uint8_t trans_index;
+} CFX_GifGraphicControlExtension;
+
+typedef struct {
+  uint8_t block_size;
+  uint16_t grid_left;
+  uint16_t grid_top;
+  uint16_t grid_width;
+  uint16_t grid_height;
+
+  uint8_t char_width;
+  uint8_t char_height;
+
+  uint8_t fc_index;
+  uint8_t bc_index;
+} CFX_GifPlainTextExtension;
+
+typedef struct {
+  uint8_t block_size;
+  uint8_t app_identify[8];
+  uint8_t app_authentication[3];
+} GifApplicationExtension;
+
+typedef struct { uint8_t r, g, b; } CFX_GifPalette;
+#pragma pack()
+
+enum class CFX_GifDecodeStatus {
+  Error,
+  Success,
+  Unfinished,
+  InsufficientDestSize,  // Only used internally by CGifLZWDecoder::Decode()
+};
+
+typedef struct {
+  std::unique_ptr<CFX_GifGraphicControlExtension> image_GCE;
+  std::vector<CFX_GifPalette> local_palettes;
+  std::vector<uint8_t> row_buffer;
+  CFX_CFX_GifImageInfo image_info;
+  uint8_t local_pallette_exp;
+  uint8_t code_exp;
+  uint32_t data_pos;
+  int32_t row_num;
+} CFX_GifImage;
+
+#endif  // CORE_FXCODEC_GIF_CFX_GIF_H_
-- 
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