cc: Add point-based UV coordinate on TextureLayer

cc/video_layer_impl.cc

Index: cc/video_layer_impl.cc
diff --git a/cc/video_layer_impl.cc b/cc/video_layer_impl.cc
index 130e6f2460a25cd0b60ce6c9612d6a1c1846addb..3b367032008c7783aa4fe84bfebe009963008dc2 100644
--- a/cc/video_layer_impl.cc
+++ b/cc/video_layer_impl.cc
@@ -224,22 +224,24 @@ void VideoLayerImpl::appendQuads(QuadSink& quadSink, AppendQuadsData& appendQuad
         // RGBA software decoder.
         const FramePlane& plane = m_framePlanes[media::VideoFrame::kRGBPlane];
         bool premultipliedAlpha = true;
-        gfx::RectF uvRect(0, 0, texWidthScale, texHeightScale);
+        gfx::PointF uvtl(0, 0);

[danakj, 2013/01/10 18:12:26]

uv_top_left

please dont use cryptic abbreviations lile this

[Jerome, 2013/01/10 19:21:55]

Done.

+        gfx::PointF uvbr(texWidthScale, texHeightScale);

[danakj, 2013/01/10 18:12:26]

being a bit unfamiliar with this stuff, i wonder if a point (position) and
vector2d (scale) would make sense instead of keeping the rect paradigm. 

[Jerome, 2013/01/10 19:21:55]

Usually UV coordinates are expressed on a per vertex basis. So using points
feels actually more natural to to that than using origin+size.

         const float opacity[] = {1.0f, 1.0f, 1.0f, 1.0f};
         bool flipped = false;
         scoped_ptr<TextureDrawQuad> textureQuad = TextureDrawQuad::Create();
-        textureQuad->SetNew(sharedQuadState, quadRect, opaqueRect, plane.resourceId, premultipliedAlpha, uvRect, opacity, flipped);
+        textureQuad->SetNew(sharedQuadState, quadRect, opaqueRect, plane.resourceId, premultipliedAlpha, uvtl, uvbr, opacity, flipped);
         quadSink.append(textureQuad.PassAs<DrawQuad>(), appendQuadsData);
         break;
     }
     case GL_TEXTURE_2D: {
         // NativeTexture hardware decoder.
         bool premultipliedAlpha = true;
-        gfx::RectF uvRect(0, 0, texWidthScale, texHeightScale);
+        gfx::PointF uvtl(0, 0);
+        gfx::PointF uvbr(texWidthScale, texHeightScale);
         const float opacity[] = {1.0f, 1.0f, 1.0f, 1.0f};
         bool flipped = false;
         scoped_ptr<TextureDrawQuad> textureQuad = TextureDrawQuad::Create();
-        textureQuad->SetNew(sharedQuadState, quadRect, opaqueRect, m_externalTextureResource, premultipliedAlpha, uvRect, opacity, flipped);
+        textureQuad->SetNew(sharedQuadState, quadRect, opaqueRect, m_externalTextureResource, premultipliedAlpha, uvtl, uvbr, opacity, flipped);
         quadSink.append(textureQuad.PassAs<DrawQuad>(), appendQuadsData);
         break;
     }