Hack to enable video on mac by creating a blank PlatformContextMac to draw on.

This isn't a great solution, but it kinda works.  Video renders, and the speed is acceptable even though we're doing an extra copy for each frame.  The image shows up upside-down though. :(

Review URL: http://codereview.chromium.org/126087

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@18503 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 33 insertions, 2 deletions

diff --git a/webkit/api/src/WebMediaPlayerClientImpl.cpp b/webkit/api/src/WebMediaPlayerClientImpl.cpp
index d4d565a..ca666e9 100644
--- a/webkit/api/src/WebMediaPlayerClientImpl.cpp
+++ b/webkit/api/src/WebMediaPlayerClientImpl.cpp
@@ -305,11 +305,40 @@ void WebMediaPlayerClientImpl::setSize(const IntSize& size)
 
 void WebMediaPlayerClientImpl::paint(GraphicsContext* context, const IntRect& rect)
 {
-    // FIXME: enable this for mac.
+    if (m_webMediaPlayer.get()) {
 #if WEBKIT_USING_SKIA
-    if (m_webMediaPlayer.get())
         m_webMediaPlayer->paint(context->platformContext()->canvas(), rect);
+#elif WEBKIT_USING_CG
+        // If there is no preexisting platform canvas, or if the size has
+        // changed, recreate the canvas.  This is to avoid recreating the bitmap
+        // buffer over and over for each frame of video.
+        if (!m_webCanvas ||
+            m_webCanvas->getDevice()->width() != rect.width() ||
+            m_webCanvas->getDevice()->height() != rect.height()) {
+            m_webCanvas.set(new WebCanvas(rect.width(), rect.height(), true));
+        }
+
+        IntRect normalized_rect(0, 0, rect.width(), rect.height());
+        m_webMediaPlayer->paint(m_webCanvas.get(), normalized_rect);
+
+        // The mac coordinate system is flipped vertical from the normal skia
+        // coordinates.  During painting of the frame, flip the coordinates
+        // system and, for simplicity, also translate the clip rectangle to
+        // start at 0,0.
+        CGContext* cgContext = context->platformContext();
+        CGContextSaveGState(cgContext);
+        CGContextTranslateCTM(cgContext, rect.x(), rect.height() + rect.y());
+        CGContextScaleCTM(cgContext, 1.0, -1.0);
+        CGRect normalized_cgrect = normalized_rect;  // For DrawToContext.
+
+        m_webCanvas->getTopPlatformDevice().DrawToContext(
+            context->platformContext(), 0, 0, &normalized_cgrect);
+
+        CGContextRestoreGState(cgContext);
+#else
+        notImplemented();
 #endif
+    }
 }
 
 void WebMediaPlayerClientImpl::setAutobuffer(bool autoBuffer)
diff --git a/webkit/api/src/WebMediaPlayerClientImpl.h b/webkit/api/src/WebMediaPlayerClientImpl.h
index e4f2b9f..9f5cd5d 100644
--- a/webkit/api/src/WebMediaPlayerClientImpl.h
+++ b/webkit/api/src/WebMediaPlayerClientImpl.h
@@ -36,6 +36,7 @@
 #include "WebMediaPlayerClient.h"
 
 #include "MediaPlayerPrivate.h"
+#include "WebCanvas.h"
 #include <wtf/OwnPtr.h>
 
 namespace WebKit {
@@ -98,6 +99,7 @@ namespace WebKit {
 
         WebCore::MediaPlayer* m_mediaPlayer;
         OwnPtr<WebMediaPlayer> m_webMediaPlayer;
+        OwnPtr<WebKit::WebCanvas> m_webCanvas;
     };
 
 } // namespace WebKit