Linear filter for texture object in 2d context

third_party/WebKit/Source/platform/graphics/OffscreenCanvasFrameDispatcherImpl.cpp

Index: third_party/WebKit/Source/platform/graphics/OffscreenCanvasFrameDispatcherImpl.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/OffscreenCanvasFrameDispatcherImpl.cpp b/third_party/WebKit/Source/platform/graphics/OffscreenCanvasFrameDispatcherImpl.cpp
index 61331f8308302508f2389421354e8de745899dbd..5c2d1390dfa0a21918076ae8b5043011e1adb9e0 100644
--- a/third_party/WebKit/Source/platform/graphics/OffscreenCanvasFrameDispatcherImpl.cpp
+++ b/third_party/WebKit/Source/platform/graphics/OffscreenCanvasFrameDispatcherImpl.cpp
@@ -114,7 +114,7 @@ void OffscreenCanvasFrameDispatcherImpl::
       (kN32_SkColorType == kRGBA_8888_SkColorType) ? GL_RGBA : GL_BGRA_EXT;
   gl->TexImage2D(GL_TEXTURE_2D, 0, format, m_width, m_height, 0, format,
                  GL_UNSIGNED_BYTE, 0);
-  gl->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+  gl->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
   gl->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
   gl->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
   gl->TexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, m_width, m_height, format,
@@ -201,7 +201,7 @@ void OffscreenCanvasFrameDispatcherImpl::dispatchFrame(
   resource.format = cc::ResourceFormat::RGBA_8888;
   // TODO(crbug.com/645590): filter should respect the image-rendering CSS
   // property of associated canvas element.
-  resource.filter = GL_LINEAR;
+  resource.filter = GL_NEAREST;

[Justin Novosad, 2017/01/04 20:38:01]

I don't understand how this fixes the problem.  What we want is LINEAR
filtering, not NEAREST.  The problem was that the request for GL_LINEAR was
being ignored for some reason.

   resource.size = gfx::Size(m_width, m_height);
   // TODO(crbug.com/646022): making this overlay-able.
   resource.is_overlay_candidate = false;