gl: Test YV12 buffer drm import.

ui/gl/test/gl_image_test_support.cc

Index: ui/gl/test/gl_image_test_support.cc
diff --git a/ui/gl/test/gl_image_test_support.cc b/ui/gl/test/gl_image_test_support.cc
index cb996b47e263afd9ed8e68f432954a526b908ca7..460f48a5673bcaf0f456c78bc0ba3962d4ade228 100644
--- a/ui/gl/test/gl_image_test_support.cc
+++ b/ui/gl/test/gl_image_test_support.cc
@@ -104,6 +104,32 @@ void GLImageTestSupport::SetBufferDataToColor(int width,
         }
       }
       return;
+    case gfx::BufferFormat::YVU_420: {
+      DCHECK_LT(plane, 3);
+      DCHECK_EQ(0, height % 2);
+      DCHECK_EQ(0, width % 2);
+      // These values are used in the transformation from YUV to RGB color
+      // values. They are taken from the following webpage:
+      // http://www.fourcc.org/fccyvrgb.php
+      uint8_t yvu[] = {
+          (0.257 * color[0]) + (0.504 * color[1]) + (0.098 * color[2]) + 16,
+          (0.439 * color[0]) - (0.368 * color[1]) - (0.071 * color[2]) + 128,
+          -(0.148 * color[0]) - (0.291 * color[1]) + (0.439 * color[2]) + 128};
+      if (plane == 0) {
+        for (int y = 0; y < height; ++y) {
+          for (int x = 0; x < width; ++x) {
+            data[stride * y + x] = yvu[0];
+          }
+        }
+      } else {
+        for (int y = 0; y < height / 2; ++y) {
+          for (int x = 0; x < width / 2; ++x) {
+            data[stride * y + x] = yvu[plane];
+          }
+        }
+      }
+      return;
+    }
     case gfx::BufferFormat::YUV_420_BIPLANAR: {
       DCHECK_LT(plane, 2);
       DCHECK_EQ(0, height % 2);
@@ -138,7 +164,6 @@ void GLImageTestSupport::SetBufferDataToColor(int width,
     case gfx::BufferFormat::ETC1:
     case gfx::BufferFormat::RGBA_4444:
     case gfx::BufferFormat::UYVY_422:
-    case gfx::BufferFormat::YVU_420:
       NOTREACHED();
       return;
   }