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      1 // Copyright 2014 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "cc/output/overlay_candidate.h"
      6 
      7 #include <algorithm>
      8 #include "base/logging.h"
      9 #include "ui/gfx/geometry/rect_conversions.h"
     10 
     11 namespace cc {
     12 
     13 OverlayCandidate::OverlayCandidate()
     14     : transform(gfx::OVERLAY_TRANSFORM_NONE),
     15       format(RGBA_8888),
     16       uv_rect(0.f, 0.f, 1.f, 1.f),
     17       resource_id(0),
     18       plane_z_order(0),
     19       overlay_handled(false) {}
     20 
     21 OverlayCandidate::~OverlayCandidate() {}
     22 
     23 // static
     24 gfx::OverlayTransform OverlayCandidate::GetOverlayTransform(
     25     const gfx::Transform& quad_transform,
     26     bool flipped) {
     27   if (!quad_transform.IsIdentityOrTranslation())
     28     return gfx::OVERLAY_TRANSFORM_INVALID;
     29 
     30   return flipped ? gfx::OVERLAY_TRANSFORM_FLIP_VERTICAL
     31                  : gfx::OVERLAY_TRANSFORM_NONE;
     32 }
     33 
     34 // static
     35 gfx::Rect OverlayCandidate::GetOverlayRect(const gfx::Transform& quad_transform,
     36                                            const gfx::Rect& rect) {
     37   DCHECK(quad_transform.IsIdentityOrTranslation());
     38 
     39   gfx::RectF float_rect(rect);
     40   quad_transform.TransformRect(&float_rect);
     41   return gfx::ToNearestRect(float_rect);
     42 }
     43 
     44 }  // namespace cc
     45