Use SkJpegEncoder in gfx jpeg_codec

pdf/pdfium/pdfium_engine.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "pdf/pdfium/pdfium_engine.h"
 
 #include <math.h>
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 1403 matching lines @@
 
   // Add the bitmap to an image object and add the image object to the output
   // page.
   FPDF_PAGEOBJECT temp_img = FPDFPageObj_NewImageObj(temp_doc);
 
   std::vector<uint8_t> compressed_bitmap_data;
   // Use quality = 40 as this does not significantly degrade the printed
   // document relative to a normal bitmap and provides better compression than
   // a higher quality setting.
   const int quality = 40;
+  SkImageInfo info = SkImageInfo::Make(

[Lei Zhang, 2017/06/16 21:22:37]

We are doing a bit more work than before for a branch that may not be taken. Let
me see if I can shuffle the code around a bit.

+      FPDFBitmap_GetWidth(bitmap), FPDFBitmap_GetHeight(bitmap),
+      kBGRA_8888_SkColorType, kOpaque_SkAlphaType);
+  SkPixmap src(info, bitmap_data, FPDFBitmap_GetStride(bitmap));
   if (!(print_settings.format & PP_PRINTOUTPUTFORMAT_PDF) &&
-      (gfx::JPEGCodec::Encode(
-          bitmap_data, gfx::JPEGCodec::FORMAT_BGRA, FPDFBitmap_GetWidth(bitmap),
-          FPDFBitmap_GetHeight(bitmap), FPDFBitmap_GetStride(bitmap), quality,
-          &compressed_bitmap_data))) {
+      (gfx::JPEGCodec::Encode(src, quality, &compressed_bitmap_data))) {
     FPDF_FILEACCESS file_access = {};
     file_access.m_FileLen =
         static_cast<unsigned long>(compressed_bitmap_data.size());
     file_access.m_GetBlock = &GetBlockForJpeg;
     file_access.m_Param = &compressed_bitmap_data;
 
     FPDFImageObj_LoadJpegFileInline(&temp_page, 1, temp_img, &file_access);
   } else {
     FPDFImageObj_SetBitmap(&temp_page, 1, temp_img, bitmap);
   }
@@ skipping 2695 matching lines @@
   FPDF_DOCUMENT doc =
       FPDF_LoadMemDocument(pdf_buffer, pdf_buffer_size, nullptr);
   if (!doc)
     return false;
   bool success = FPDF_GetPageSizeByIndex(doc, page_number, width, height) != 0;
   FPDF_CloseDocument(doc);
   return success;
 }
 
 }  // namespace chrome_pdf