gecko/gfx/layers/opengl/ColorLayerOGL.cpp

95 lines
3.1 KiB
C++

/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Corporation code.
*
* The Initial Developer of the Original Code is Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2009
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Robert O'Callahan <robert@ocallahan.org>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "ColorLayerOGL.h"
namespace mozilla {
namespace layers {
LayerOGL::LayerType
ColorLayerOGL::GetType()
{
return TYPE_COLOR;
}
Layer*
ColorLayerOGL::GetLayer()
{
return this;
}
void
ColorLayerOGL::RenderLayer(int, DrawThebesLayerCallback, void*)
{
static_cast<LayerManagerOGL*>(mManager)->MakeCurrent();
// XXX we might be able to improve performance by using glClear
float quadTransform[4][4];
nsIntRect visibleRect = mVisibleRegion.GetBounds();
// Transform the quad to the size of the visible area.
memset(&quadTransform, 0, sizeof(quadTransform));
quadTransform[0][0] = (float)visibleRect.width;
quadTransform[1][1] = (float)visibleRect.height;
quadTransform[2][2] = 1.0f;
quadTransform[3][0] = (float)visibleRect.x;
quadTransform[3][1] = (float)visibleRect.y;
quadTransform[3][3] = 1.0f;
ColorLayerProgram *program =
static_cast<LayerManagerOGL*>(mManager)->GetColorLayerProgram();
program->Activate();
program->SetLayerQuadTransform(&quadTransform[0][0]);
gfxRGBA color = mColor;
// color is premultiplied, so we need to adjust all channels
color.r *= GetOpacity();
color.g *= GetOpacity();
color.b *= GetOpacity();
color.a *= GetOpacity();
program->SetLayerColor(color);
program->SetLayerTransform(&mTransform._11);
program->Apply();
gl()->fDrawArrays(LOCAL_GL_TRIANGLE_STRIP, 0, 4);
}
} /* layers */
} /* mozilla */