Add PostScript PASSTHROUGH options to FPDF_SetPrintMode().

The existing PostScript modes write data into EMF comments. This
satisfies Chromium's use case, but other embedders want to write data
out via ExtEscape() in PASSTHROUGH mode.

BUG=pdfium:1068

Change-Id: I998035e99fbb84b16dcd244b750b476cecc3bd22
Reviewed-on: https://pdfium-review.googlesource.com/31299
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>
Reviewed-by: Rebekah Potter <rbpotter@chromium.org>

1 files changed, 9 insertions, 4 deletions

diff --git a/core/fxge/win32/cpsoutput.cpp b/core/fxge/win32/cpsoutput.cpp
index 83f2fc09c6..5c734aa57a 100644
--- a/core/fxge/win32/cpsoutput.cpp
+++ b/core/fxge/win32/cpsoutput.cpp
@@ -10,7 +10,7 @@
 
 #include "core/fxcrt/fx_system.h"
 
-CPSOutput::CPSOutput(HDC hDC) : m_hDC(hDC) {}
+CPSOutput::CPSOutput(HDC hDC, OutputMode mode) : m_hDC(hDC), m_mode(mode) {}
 
 CPSOutput::~CPSOutput() {}
 
@@ -22,9 +22,14 @@ bool CPSOutput::WriteBlock(const void* str, size_t len) {
     *(reinterpret_cast<uint16_t*>(buffer)) = send_len;
     memcpy(buffer + 2, static_cast<const char*>(str) + sent_len, send_len);
 
-    // TODO(thestig/rbpotter): Do PASSTHROUGH for non-Chromium usage.
-    // ExtEscape(m_hDC, PASSTHROUGH, send_len + 2, buffer, 0, nullptr);
-    ::GdiComment(m_hDC, send_len + 2, reinterpret_cast<const BYTE*>(buffer));
+    switch (m_mode) {
+      case OutputMode::kExtEscape:
+        ExtEscape(m_hDC, PASSTHROUGH, send_len + 2, buffer, 0, nullptr);
+        break;
+      case OutputMode::kGdiComment:
+        GdiComment(m_hDC, send_len + 2, reinterpret_cast<const BYTE*>(buffer));
+        break;
+    }
     sent_len += send_len;
     len -= send_len;
   }