Revised sub-rectangle scaling for use in Chromoting.

media/base/yuv_convert.h

Index: media/base/yuv_convert.h
diff --git a/media/base/yuv_convert.h b/media/base/yuv_convert.h
index 95b1780e59123d88713801b2b9db06b6da2de474..720fe36b9f8561d12d92851211f01887f5252131 100644
--- a/media/base/yuv_convert.h
+++ b/media/base/yuv_convert.h
@@ -67,6 +67,25 @@ void ScaleYUVToRGB32(const uint8* yplane,
                      Rotate view_rotate,
                      ScaleFilter filter);
 
+// Biliner Scale a frame of YV12 to 32 bits ARGB on a specified rectangle.
+// |yplane|, etc and |rgbframe| should point to the top-left pixels of the
+// source and destination buffers.
+void ScaleYUVToRGB32WithRect(const uint8* yplane,

[scherkus (not reviewing), 2011/12/15 21:52:35]

thinking out loud... I wonder if it makes sense to go with gfx::Size / gfx::Rect
at some point

maybe one day :)

[Wez, 2012/01/12 02:29:48]

That would be awesome, but:
a) are those stable enough; other code seems to use skia equivalents?
b) I thought media/ specifically avoided that dependency, although I notice some
media/ code now uses gfx::Rect, so perhaps that's no longer true?

[scherkus (not reviewing), 2012/01/12 02:40:32]

we have a bit of gfx::Size/Rect usage but no skia usage yet

I'd need to check with some graphics-y people to see if perhaps we should be
using skia primitives instead

+                             const uint8* uplane,
+                             const uint8* vplane,
+                             uint8* rgbframe,
+                             int source_width,
+                             int source_height,
+                             int dest_width,
+                             int dest_height,
+                             int dest_rect_left,
+                             int dest_rect_top,
+                             int dest_rect_right,
+                             int dest_rect_bottom,
+                             int ystride,
+                             int uvstride,
+                             int rgbstride);
+
 void ConvertRGB32ToYUV(const uint8* rgbframe,
                        uint8* yplane,
                        uint8* uplane,