gecko/gfx/layers/composite/ColorLayerComposite.cpp

/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "ColorLayerComposite.h"
#include "gfxColor.h"                   // for gfxRGBA
#include "mozilla/RefPtr.h"             // for RefPtr
#include "mozilla/gfx/Matrix.h"         // for Matrix4x4
#include "mozilla/gfx/Point.h"          // for Point
#include "mozilla/gfx/Rect.h"           // for Rect
#include "mozilla/gfx/Types.h"          // for Color
#include "mozilla/layers/Compositor.h"  // for Compositor
#include "mozilla/layers/CompositorTypes.h"  // for DiagnosticFlags::COLOR
#include "mozilla/layers/Effects.h"     // for Effect, EffectChain, etc
#include "mozilla/mozalloc.h"           // for operator delete, etc
#include "nsPoint.h"                    // for nsIntPoint
#include "nsRect.h"                     // for nsIntRect

namespace mozilla {
namespace layers {

void
ColorLayerComposite::RenderLayer(const nsIntRect& aClipRect)
{
  EffectChain effects(this);

  GenEffectChain(effects);

  nsIntRect boundRect = GetBounds();

  LayerManagerComposite::AutoAddMaskEffect autoMaskEffect(GetMaskLayer(),
                                                          effects);

  gfx::Rect rect(boundRect.x, boundRect.y,
                 boundRect.width, boundRect.height);
  gfx::Rect clipRect(aClipRect.x, aClipRect.y,
                     aClipRect.width, aClipRect.height);

  float opacity = GetEffectiveOpacity();

  AddBlendModeEffect(effects);

  const gfx::Matrix4x4& transform = GetEffectiveTransform();
  mCompositor->DrawQuad(rect, clipRect, effects, opacity, transform);
  mCompositor->DrawDiagnostics(DiagnosticFlags::COLOR,
                               rect, clipRect,
                               transform);
}

void
ColorLayerComposite::GenEffectChain(EffectChain& aEffect)
{
  aEffect.mLayerRef = this;
  gfxRGBA color(GetColor());
  aEffect.mPrimaryEffect = new EffectSolidColor(gfx::Color(color.r,
                                                           color.g,
                                                           color.b,
                                                           color.a));
}

} /* layers */
} /* mozilla */