Added functions to the Pepper interface to allow plugins to participate in the browser's print workflow. For now, added an interface for raster print output.

Also modified vector_platform_device_win.cc to allow the caller to set a bitmap compression mode for use in the internalDrawBitmap method. Supported compression modes are JPEG and PNG.
BUG=none
TEST=Test printing with new plugins that support this interface.

Review URL: http://codereview.chromium.org/669280

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@41321 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 55 insertions, 1 deletions

diff --git a/webkit/glue/plugins/webplugin_print_delegate.h b/webkit/glue/plugins/webplugin_print_delegate.h
new file mode 100644
index 0000000..1cd5b6d
--- /dev/null
+++ b/webkit/glue/plugins/webplugin_print_delegate.h
@@ -0,0 +1,51 @@
+// Copyright (c) 2010 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.
+
+#ifndef WEBKIT_GLUE_PLUGINS_WEBPLUGIN_PRINT_DELEGATE_H_
+#define WEBKIT_GLUE_PLUGINS_WEBPLUGIN_PRINT_DELEGATE_H_
+
+#include "base/basictypes.h"
+#include "third_party/npapi/bindings/npapi_extensions.h"
+
+namespace gfx {
+class Rect;
+}
+
+namespace webkit_glue {
+
+// Interface for the NPAPI print extension. This class implements "NOP"
+// versions of all these functions so it can be used seamlessly by the
+// "regular" plugin delegate while being overridden by the "pepper" one.
+class WebPluginPrintDelegate {
+ public:
+  // If a plugin supports print extensions, then it gets to participate fully
+  // in the browser's print workflow by specifying the number of pages to be
+  // printed and providing a print output for specified pages.
+  virtual bool PrintSupportsPrintExtension() {
+    return false;
+  }
+
+  // Note: printable_area is in points (a point is 1/72 of an inch).
+  virtual int PrintBegin(const gfx::Rect& printable_area, int printer_dpi) {
+    return 0;
+  }
+
+  // Note: printable_area is in points (a point is 1/72 of an inch).
+  virtual bool PrintPage(int page_number, const gfx::Rect& printable_area,
+                         int printer_dpi, WebKit::WebCanvas* canvas) {
+    return false;
+  }
+
+  virtual void PrintEnd() {
+  }
+
+ protected:
+  WebPluginPrintDelegate() {}
+  virtual ~WebPluginPrintDelegate() {}
+};
+
+}  // namespace webkit_glue
+
+#endif  // WEBKIT_GLUE_PLUGINS_WEBPLUGIN_PRINT_DELEGATE_H_
+
diff --git a/webkit/glue/webplugin_delegate.h b/webkit/glue/webplugin_delegate.h
index 52c7186..8285d6c 100644
--- a/webkit/glue/webplugin_delegate.h
+++ b/webkit/glue/webplugin_delegate.h
@@ -17,6 +17,8 @@
 #include "webkit/glue/plugins/webplugin_2d_device_delegate.h"
 #include "webkit/glue/plugins/webplugin_3d_device_delegate.h"
 #include "webkit/glue/plugins/webplugin_audio_device_delegate.h"
+#include "webkit/glue/plugins/webplugin_print_delegate.h"
+
 
 class FilePath;
 class GURL;
@@ -39,7 +41,8 @@ class WebPluginResourceClient;
 // This is the interface that a plugin implementation needs to provide.
 class WebPluginDelegate : public WebPlugin2DDeviceDelegate,
                           public WebPlugin3DDeviceDelegate,
-                          public WebPluginAudioDeviceDelegate {
+                          public WebPluginAudioDeviceDelegate,
+                          public WebPluginPrintDelegate {
  public:
   virtual ~WebPluginDelegate() {}