Remove ambiguity of SkJpegUtility name.

src/images/SkJpegUtility.cpp

-/*
- * Copyright 2010 The Android Open Source Project
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-
-#include "SkJpegUtility.h"
-
-/////////////////////////////////////////////////////////////////////
-static void sk_init_source(j_decompress_ptr cinfo) {
-    skjpeg_source_mgr*  src = (skjpeg_source_mgr*)cinfo->src;
-    src->next_input_byte = (const JOCTET*)src->fBuffer;
-    src->bytes_in_buffer = 0;
-#ifdef SK_BUILD_FOR_ANDROID
-    src->current_offset = 0;
-#endif
-    if (!src->fStream->rewind()) {
-        SkDebugf("xxxxxxxxxxxxxx failure to rewind\n");
-        cinfo->err->error_exit((j_common_ptr)cinfo);
-    }
-}
-
-#ifdef SK_BUILD_FOR_ANDROID
-static boolean sk_seek_input_data(j_decompress_ptr cinfo, long byte_offset) {
-    skjpeg_source_mgr* src = (skjpeg_source_mgr*)cinfo->src;
-    size_t bo = (size_t) byte_offset;
-
-    if (bo > src->current_offset) {
-        (void)src->fStream->skip(bo - src->current_offset);
-    } else {
-        if (!src->fStream->rewind()) {
-            SkDebugf("xxxxxxxxxxxxxx failure to rewind\n");
-            cinfo->err->error_exit((j_common_ptr)cinfo);
-            return false;
-        }
-        (void)src->fStream->skip(bo);
-    }
-
-    src->current_offset = bo;
-    src->next_input_byte = (const JOCTET*)src->fBuffer;
-    src->bytes_in_buffer = 0;
-    return true;
-}
-#endif
-
-static boolean sk_fill_input_buffer(j_decompress_ptr cinfo) {
-    skjpeg_source_mgr* src = (skjpeg_source_mgr*)cinfo->src;
-    if (src->fDecoder != NULL && src->fDecoder->shouldCancelDecode()) {
-        return FALSE;
-    }
-    size_t bytes = src->fStream->read(src->fBuffer, skjpeg_source_mgr::kBufferSize);
-    // note that JPEG is happy with less than the full read,
-    // as long as the result is non-zero
-    if (bytes == 0) {
-        return FALSE;
-    }
-
-#ifdef SK_BUILD_FOR_ANDROID
-    src->current_offset += bytes;
-#endif
-    src->next_input_byte = (const JOCTET*)src->fBuffer;
-    src->bytes_in_buffer = bytes;
-    return TRUE;
-}
-
-static void sk_skip_input_data(j_decompress_ptr cinfo, long num_bytes) {
-    skjpeg_source_mgr*  src = (skjpeg_source_mgr*)cinfo->src;
-
-    if (num_bytes > (long)src->bytes_in_buffer) {
-        size_t bytesToSkip = num_bytes - src->bytes_in_buffer;
-        while (bytesToSkip > 0) {
-            size_t bytes = src->fStream->skip(bytesToSkip);
-            if (bytes <= 0 || bytes > bytesToSkip) {
-//              SkDebugf("xxxxxxxxxxxxxx failure to skip request %d returned %d\n", bytesToSkip, bytes);
-                cinfo->err->error_exit((j_common_ptr)cinfo);
-                return;
-            }
-#ifdef SK_BUILD_FOR_ANDROID
-            src->current_offset += bytes;
-#endif
-            bytesToSkip -= bytes;
-        }
-        src->next_input_byte = (const JOCTET*)src->fBuffer;
-        src->bytes_in_buffer = 0;
-    } else {
-        src->next_input_byte += num_bytes;
-        src->bytes_in_buffer -= num_bytes;
-    }
-}
-
-static void sk_term_source(j_decompress_ptr /*cinfo*/) {}
-
-
-///////////////////////////////////////////////////////////////////////////////
-
-skjpeg_source_mgr::skjpeg_source_mgr(SkStream* stream, SkImageDecoder* decoder)
-    : fStream(stream)
-    , fDecoder(decoder) {
-
-    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;
-#ifdef SK_BUILD_FOR_ANDROID
-    seek_input_data = sk_seek_input_data;
-#endif
-//    SkDebugf("**************** use memorybase %p %d\n", fMemoryBase, fMemoryBaseSize);
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-static void sk_init_destination(j_compress_ptr cinfo) {
-    skjpeg_destination_mgr* dest = (skjpeg_destination_mgr*)cinfo->dest;
-
-    dest->next_output_byte = dest->fBuffer;
-    dest->free_in_buffer = skjpeg_destination_mgr::kBufferSize;
-}
-
-static boolean sk_empty_output_buffer(j_compress_ptr cinfo) {
-    skjpeg_destination_mgr* dest = (skjpeg_destination_mgr*)cinfo->dest;
-
-//  if (!dest->fStream->write(dest->fBuffer, skjpeg_destination_mgr::kBufferSize - dest->free_in_buffer))
-    if (!dest->fStream->write(dest->fBuffer,
-            skjpeg_destination_mgr::kBufferSize)) {
-        ERREXIT(cinfo, JERR_FILE_WRITE);
-        return false;
-    }
-
-    dest->next_output_byte = dest->fBuffer;
-    dest->free_in_buffer = skjpeg_destination_mgr::kBufferSize;
-    return TRUE;
-}
-
-static void sk_term_destination (j_compress_ptr cinfo) {
-    skjpeg_destination_mgr* dest = (skjpeg_destination_mgr*)cinfo->dest;
-
-    size_t size = skjpeg_destination_mgr::kBufferSize - dest->free_in_buffer;
-    if (size > 0) {
-        if (!dest->fStream->write(dest->fBuffer, size)) {
-            ERREXIT(cinfo, JERR_FILE_WRITE);
-            return;
-        }
-    }
-    dest->fStream->flush();
-}
-
-skjpeg_destination_mgr::skjpeg_destination_mgr(SkWStream* stream)
-        : fStream(stream) {
-    this->init_destination = sk_init_destination;
-    this->empty_output_buffer = sk_empty_output_buffer;
-    this->term_destination = sk_term_destination;
-}
-
-void skjpeg_error_exit(j_common_ptr cinfo) {
-    skjpeg_error_mgr* error = (skjpeg_error_mgr*)cinfo->err;
-
-    (*error->output_message) (cinfo);
-
-    /* Let the memory manager delete any temp files before we die */
-    jpeg_destroy(cinfo);
-
-    longjmp(error->fJmpBuf, -1);
-}