Switch to linear filtering for video frames on Android.

content/common/gpu/media/android_deferred_rendering_backing_strategy.cc

 // Copyright 2015 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.
 
 #include <EGL/egl.h>
 #include <EGL/eglext.h>
 
 #include "content/common/gpu/media/android_deferred_rendering_backing_strategy.h"
 
 #include "base/bind.h"
@@ skipping 259 matching lines @@
   if (!gl_decoder)
     return;
 
   const gfx::Size size = state_provider_->GetSize();
 
   // Create a 2D texture to hold a copy of the SurfaceTexture's front buffer.
   GLuint tmp_texture_id;
   glGenTextures(1, &tmp_texture_id);
   {
     gfx::ScopedTextureBinder texture_binder(GL_TEXTURE_2D, tmp_texture_id);
-    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    // The target texture's size will exactly match the source.
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
     glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, size.width(), size.height(), 0,
                  GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
   }
 
   // TODO(liberato,watk): Use the SurfaceTexture matrix when copying.
   gpu::CopyTextureCHROMIUMResourceManager copier;
   copier.Initialize(
       gl_decoder,
@@ skipping 30 matching lines @@
 
   EGLBoolean result =
       eglDestroyImageKHR(gfx::GLSurfaceEGL::GetHardwareDisplay(), egl_image);
   if (result == EGL_FALSE) {
     DLOG(ERROR) << "Error destroying EGLImage: "
                 << ui::GetLastEGLErrorString();
   }
 }
 
 }  // namespace content