Rename GIFImageReader to SkGifImageReader

third_party/gif/SkGifImageReader.cpp

 /* -*- Mode: C; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* ***** BEGIN LICENSE BLOCK *****
  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
  *
  * The contents of this file are subject to the Mozilla Public License Version
  * 1.1 (the "License"); you may not use this file except in compliance with
  * the License. You may obtain a copy of the License at
  * http://www.mozilla.org/MPL/
  *
  * Software distributed under the License is distributed on an "AS IS" basis,
@@ skipping 54 matching lines @@
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-#include "GIFImageReader.h"
+#include "SkGifImageReader.h"
 #include "SkColorPriv.h"
 #include "SkGifCodec.h"
 
 #include <algorithm>
 #include <string.h>
 
 
 // GETN(n, s) requests at least 'n' bytes available from 'q', at start of state 's'.
 //
 // Note, the hold will never need to be bigger than 256 bytes to gather up in the hold,
 // as each GIF block (except colormaps) can never be bigger than 256 bytes.
 // Colormaps are directly copied in the resp. global_colormap or dynamically allocated local_colormap.
-// So a fixed buffer in GIFImageReader is good enough.
+// So a fixed buffer in SkGifImageReader is good enough.
 // This buffer is only needed to copy left-over data from one GifWrite call to the next
 #define GETN(n, s) \
     do { \
         m_bytesToConsume = (n); \
         m_state = (s); \
     } while (0)
 
 // Get a 16-bit value stored in little-endian format.
 #define GETINT16(p)   ((p)[1]<<8|(p)[0])
 
@@ skipping 92 matching lines @@
             default:
                 break;
             }
         } while (irow > (m_frameContext->height() - 1));
     }
     return true;
 }
 
 // Perform Lempel-Ziv-Welch decoding.
 // Returns true if decoding was successful. In this case the block will have been completely consumed and/or rowsRemaining will be 0.
-// Otherwise, decoding failed; returns false in this case, which will always cause the GIFImageReader to set the "decode failed" flag.
+// Otherwise, decoding failed; returns false in this case, which will always cause the SkGifImageReader to set the "decode failed" flag.
 bool GIFLZWContext::doLZW(const unsigned char* block, size_t bytesInBlock)
 {
     const size_t width = m_frameContext->width();
 
     if (rowIter == rowBuffer.end())
         return true;
 
     for (const unsigned char* ch = block; bytesInBlock-- > 0; ch++) {
         // Feed the next byte into the decoder's 32-bit input buffer.
         datum += ((int) *ch) << bits;
@@ skipping 121 matching lines @@
         }
         srcColormap += BYTES_PER_COLORMAP_ENTRY;
     }
     for (size_t i = m_colors; i < MAX_COLORS; i++) {
         colorStorage[i] = SK_ColorTRANSPARENT;
     }
     m_table = sk_sp<SkColorTable>(new SkColorTable(colorStorage, MAX_COLORS));
     return m_table;
 }
 
-sk_sp<SkColorTable> GIFImageReader::getColorTable(SkColorType colorType, size_t index) const {
+sk_sp<SkColorTable> SkGifImageReader::getColorTable(SkColorType colorType, size_t index) const {
     if (index >= m_frames.size()) {
         return nullptr;
     }
 
     const GIFFrameContext* frameContext = m_frames[index].get();
     const GIFColorMap& localColorMap = frameContext->localColorMap();
     if (localColorMap.isDefined()) {
         return localColorMap.buildTable(colorType, frameContext->transparentPixel());
     }
     if (m_globalColorMap.isDefined()) {
         return m_globalColorMap.buildTable(colorType, frameContext->transparentPixel());
     }
     return nullptr;
 }
 
 // Perform decoding for this frame. frameComplete will be true if the entire frame is decoded.
-// Returns false if a decoding error occurred. This is a fatal error and causes the GIFImageReader to set the "decode failed" flag.
+// Returns false if a decoding error occurred. This is a fatal error and causes the SkGifImageReader to set the "decode failed" flag.
 // Otherwise, either not enough data is available to decode further than before, or the new data has been decoded successfully; returns true in this case.
 bool GIFFrameContext::decode(SkGifCodec* client, bool* frameComplete)
 {
     *frameComplete = false;
     if (!m_lzwContext) {
         // Wait for more data to properly initialize GIFLZWContext.
         if (!isDataSizeDefined() || !isHeaderDefined())
             return true;
 
         m_lzwContext.reset(new GIFLZWContext(client, this));
@@ skipping 19 matching lines @@
     if (isComplete()) {
         *frameComplete = true;
         m_lzwContext.reset();
     }
     return true;
 }
 
 // Decode a frame.
 // This method uses GIFFrameContext:decode() to decode the frame; decoding error is reported to client as a critical failure.
 // Return true if decoding has progressed. Return false if an error has occurred.
-bool GIFImageReader::decode(size_t frameIndex, bool* frameComplete)
+bool SkGifImageReader::decode(size_t frameIndex, bool* frameComplete)
 {
     GIFFrameContext* currentFrame = m_frames[frameIndex].get();
 
     return currentFrame->decode(m_client, frameComplete);
 }
 
 // Parse incoming GIF data stream into internal data structures.
 // Return true if parsing has progressed or there is not enough data.
 // Return false if a fatal error is encountered.
-bool GIFImageReader::parse(GIFImageReader::GIFParseQuery query)
+bool SkGifImageReader::parse(SkGifImageReader::GIFParseQuery query)
 {
     if (m_parseCompleted) {
         return true;
     }
 
     // GIFSizeQuery and GIFFrameCountQuery are negative, so this is only meaningful when >= 0.
     const int lastFrameToParse = (int) query;
     if (lastFrameToParse >= 0 && (int) m_frames.size() > lastFrameToParse
                 && m_frames[lastFrameToParse]->isComplete()) {
         // We have already parsed this frame.
@@ skipping 421 matching lines @@
             GETN(0, GIFDone);
             return false;
             break;
         }   // switch
         m_streamBuffer.flush();
     }
 
     return true;
 }
 
-void GIFImageReader::addFrameIfNecessary()
+void SkGifImageReader::addFrameIfNecessary()
 {
     if (m_frames.empty() || m_frames.back()->isComplete()) {
         const size_t i = m_frames.size();
         std::unique_ptr<GIFFrameContext> frame(new GIFFrameContext(i));
         if (0 == i) {
             frame->setRequiredFrame(SkCodec::kNone);
         } else {
             // FIXME: We could correct these after decoding (i.e. some frames may turn out to be
             // independent although we did not determine that here).
             const GIFFrameContext* prevFrameContext = m_frames[i - 1].get();
@@ skipping 69 matching lines @@
     rowsRemaining = m_frameContext->height();
 
     // Clearing the whole suffix table lets us be more tolerant of bad data.
     for (int i = 0; i < clearCode; ++i) {
         suffix[i] = i;
         suffixLength[i] = 1;
     }
     return true;
 }