Revert postscript code removal.

Revert CL http://crrev.com/2608663003 in preparation for adding
postscript generation to Pdfium.

Note postscript generation code will not be called until additional
patches land. These patches will also include modifications needed to
make this code functional (currently missing a few compression functions).

BUG=

Review-Url: https://codereview.chromium.org/2615703002

1 files changed, 120 insertions, 16 deletions

diff --git a/core/fxcodec/codec/fx_codec_jpeg.cpp b/core/fxcodec/codec/fx_codec_jpeg.cpp
index fdfdd4faeb..c797605575 100644
--- a/core/fxcodec/codec/fx_codec_jpeg.cpp
+++ b/core/fxcodec/codec/fx_codec_jpeg.cpp
@@ -27,6 +27,7 @@ extern "C" {
 }
 
 extern "C" {
+
 static void JpegScanSOI(const uint8_t** src_buf, uint32_t* src_size) {
   if (*src_size == 0)
     return;
@@ -41,16 +42,13 @@ static void JpegScanSOI(const uint8_t** src_buf, uint32_t* src_size) {
     offset++;
   }
 }
-};
-extern "C" {
+
 static void _src_do_nothing(struct jpeg_decompress_struct* cinfo) {}
-};
-extern "C" {
+
 static void _error_fatal(j_common_ptr cinfo) {
   longjmp(*(jmp_buf*)cinfo->client_data, -1);
 }
-};
-extern "C" {
+
 static void _src_skip_data(struct jpeg_decompress_struct* cinfo, long num) {
   if (num > (long)cinfo->src->bytes_in_buffer) {
     _error_fatal((j_common_ptr)cinfo);
@@ -58,25 +56,28 @@ static void _src_skip_data(struct jpeg_decompress_struct* cinfo, long num) {
   cinfo->src->next_input_byte += num;
   cinfo->src->bytes_in_buffer -= num;
 }
-};
-extern "C" {
+
 static boolean _src_fill_buffer(j_decompress_ptr cinfo) {
   return 0;
 }
-};
-extern "C" {
+
 static boolean _src_resync(j_decompress_ptr cinfo, int desired) {
   return 0;
 }
-};
-extern "C" {
+
 static void _error_do_nothing(j_common_ptr cinfo) {}
-};
-extern "C" {
+
 static void _error_do_nothing1(j_common_ptr cinfo, int) {}
-};
-extern "C" {
+
 static void _error_do_nothing2(j_common_ptr cinfo, char*) {}
+
+#if _FX_OS_ == _FX_WIN32_DESKTOP_ || _FX_OS_ == _FX_WIN64_DESKTOP_
+static void _dest_do_nothing(j_compress_ptr cinfo) {}
+
+static boolean _dest_empty(j_compress_ptr cinfo) {
+  return false;
+}
+#endif
 };
 
 #define JPEG_MARKER_ICC (JPEG_APP0 + 2)
@@ -480,3 +481,106 @@ uint32_t CCodec_JpegModule::GetAvailInput(FXJPEG_Context* ctx,
   }
   return (uint32_t)ctx->m_SrcMgr.bytes_in_buffer;
 }
+
+#if _FX_OS_ == _FX_WIN32_DESKTOP_ || _FX_OS_ == _FX_WIN64_DESKTOP_
+#define JPEG_BLOCK_SIZE 1048576
+bool CCodec_JpegModule::JpegEncode(const CFX_DIBSource* pSource,
+                                   uint8_t** dest_buf,
+                                   FX_STRSIZE* dest_size) {
+  struct jpeg_error_mgr jerr;
+  jerr.error_exit = _error_do_nothing;
+  jerr.emit_message = _error_do_nothing1;
+  jerr.output_message = _error_do_nothing;
+  jerr.format_message = _error_do_nothing2;
+  jerr.reset_error_mgr = _error_do_nothing;
+
+  struct jpeg_compress_struct cinfo;
+  memset(&cinfo, 0, sizeof(cinfo));
+  cinfo.err = &jerr;
+  jpeg_create_compress(&cinfo);
+  int Bpp = pSource->GetBPP() / 8;
+  uint32_t nComponents = Bpp >= 3 ? (pSource->IsCmykImage() ? 4 : 3) : 1;
+  uint32_t pitch = pSource->GetPitch();
+  uint32_t width = pdfium::base::checked_cast<uint32_t>(pSource->GetWidth());
+  uint32_t height = pdfium::base::checked_cast<uint32_t>(pSource->GetHeight());
+  FX_SAFE_UINT32 safe_buf_len = width;
+  safe_buf_len *= height;
+  safe_buf_len *= nComponents;
+  safe_buf_len += 1024;
+  if (!safe_buf_len.IsValid())
+    return false;
+
+  uint32_t dest_buf_length = safe_buf_len.ValueOrDie();
+  *dest_buf = FX_TryAlloc(uint8_t, dest_buf_length);
+  const int MIN_TRY_BUF_LEN = 1024;
+  while (!(*dest_buf) && dest_buf_length > MIN_TRY_BUF_LEN) {
+    dest_buf_length >>= 1;
+    *dest_buf = FX_TryAlloc(uint8_t, dest_buf_length);
+  }
+  if (!(*dest_buf))
+    return false;
+
+  struct jpeg_destination_mgr dest;
+  dest.init_destination = _dest_do_nothing;
+  dest.term_destination = _dest_do_nothing;
+  dest.empty_output_buffer = _dest_empty;
+  dest.next_output_byte = *dest_buf;
+  dest.free_in_buffer = dest_buf_length;
+  cinfo.dest = &dest;
+  cinfo.image_width = width;
+  cinfo.image_height = height;
+  cinfo.input_components = nComponents;
+  if (nComponents == 1) {
+    cinfo.in_color_space = JCS_GRAYSCALE;
+  } else if (nComponents == 3) {
+    cinfo.in_color_space = JCS_RGB;
+  } else {
+    cinfo.in_color_space = JCS_CMYK;
+  }
+  uint8_t* line_buf = nullptr;
+  if (nComponents > 1)
+    line_buf = FX_Alloc2D(uint8_t, width, nComponents);
+
+  jpeg_set_defaults(&cinfo);
+  jpeg_start_compress(&cinfo, TRUE);
+  JSAMPROW row_pointer[1];
+  JDIMENSION row;
+  while (cinfo.next_scanline < cinfo.image_height) {
+    const uint8_t* src_scan = pSource->GetScanline(cinfo.next_scanline);
+    if (nComponents > 1) {
+      uint8_t* dest_scan = line_buf;
+      if (nComponents == 3) {
+        for (uint32_t i = 0; i < width; i++) {
+          dest_scan[0] = src_scan[2];
+          dest_scan[1] = src_scan[1];
+          dest_scan[2] = src_scan[0];
+          dest_scan += 3;
+          src_scan += Bpp;
+        }
+      } else {
+        for (uint32_t i = 0; i < pitch; i++) {
+          *dest_scan++ = ~*src_scan++;
+        }
+      }
+      row_pointer[0] = line_buf;
+    } else {
+      row_pointer[0] = (uint8_t*)src_scan;
+    }
+    row = cinfo.next_scanline;
+    jpeg_write_scanlines(&cinfo, row_pointer, 1);
+    if (cinfo.next_scanline == row) {
+      *dest_buf =
+          FX_Realloc(uint8_t, *dest_buf, dest_buf_length + JPEG_BLOCK_SIZE);
+      dest.next_output_byte = *dest_buf + dest_buf_length - dest.free_in_buffer;
+      dest_buf_length += JPEG_BLOCK_SIZE;
+      dest.free_in_buffer += JPEG_BLOCK_SIZE;
+    }
+  }
+  jpeg_finish_compress(&cinfo);
+  jpeg_destroy_compress(&cinfo);
+  FX_Free(line_buf);
+  *dest_size = dest_buf_length - (FX_STRSIZE)dest.free_in_buffer;
+
+  return true;
+}
+#endif