Rename encoders to Sk*ImageEncoder

src/codec/SkJpegUtility_codec.cpp

-/*
- * Copyright 2015 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "SkCodecPriv.h"
-#include "SkJpegUtility_codec.h"
-
-/*
- * Initialize the source manager
- */
-static void sk_init_source(j_decompress_ptr dinfo) {
-    skjpeg_source_mgr* src = (skjpeg_source_mgr*) dinfo->src;
-    src->next_input_byte = (const JOCTET*) src->fBuffer;
-    src->bytes_in_buffer = 0;
-}
-
-/*
- * Fill the input buffer from the stream
- */
-static boolean sk_fill_input_buffer(j_decompress_ptr dinfo) {
-    skjpeg_source_mgr* src = (skjpeg_source_mgr*) dinfo->src;
-    size_t bytes = src->fStream->read(src->fBuffer, skjpeg_source_mgr::kBufferSize);
-
-    // libjpeg is still happy with a less than full read, as long as the result is non-zero
-    if (bytes == 0) {
-        return false;
-    }
-
-    src->next_input_byte = (const JOCTET*) src->fBuffer;
-    src->bytes_in_buffer = bytes;
-    return true;
-}
-
-/*
- * Skip a certain number of bytes in the stream
- */
-static void sk_skip_input_data(j_decompress_ptr dinfo, long numBytes) {
-    skjpeg_source_mgr* src = (skjpeg_source_mgr*) dinfo->src;
-    size_t bytes = (size_t) numBytes;
-
-    if (bytes > src->bytes_in_buffer) {
-        size_t bytesToSkip = bytes - src->bytes_in_buffer;
-        if (bytesToSkip != src->fStream->skip(bytesToSkip)) {
-            SkCodecPrintf("Failure to skip.\n");
-            dinfo->err->error_exit((j_common_ptr) dinfo);
-            return;
-        }
-
-        src->next_input_byte = (const JOCTET*) src->fBuffer;
-        src->bytes_in_buffer = 0;
-    } else {
-        src->next_input_byte += numBytes;
-        src->bytes_in_buffer -= numBytes;
-    }
-}
-
-/*
- * We do not need to do anything to terminate our stream
- */
-static void sk_term_source(j_decompress_ptr dinfo)
-{
-    // The current implementation of SkJpegCodec does not call
-    // jpeg_finish_decompress(), so this function is never called.
-    // If we want to modify this function to do something, we also
-    // need to modify SkJpegCodec to call jpeg_finish_decompress().
-}
-
-/*
- * Constructor for the source manager that we provide to libjpeg
- * We provide skia implementations of all of the stream processing functions required by libjpeg
- */
-skjpeg_source_mgr::skjpeg_source_mgr(SkStream* stream)
-    : fStream(stream)
-{
-    init_source = sk_init_source;
-    fill_input_buffer = sk_fill_input_buffer;
-    skip_input_data = sk_skip_input_data;
-    resync_to_restart = jpeg_resync_to_restart;
-    term_source = sk_term_source;
-}
-
-/*
- * Call longjmp to continue execution on an error
- */
-void skjpeg_err_exit(j_common_ptr dinfo) {
-    // Simply return to Skia client code
-    // JpegDecoderMgr will take care of freeing memory
-    skjpeg_error_mgr* error = (skjpeg_error_mgr*) dinfo->err;
-    (*error->output_message) (dinfo);
-    longjmp(error->fJmpBuf, 1);
-}