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/*
* Copyright (C) 2011 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#if USE(ACCELERATED_COMPOSITING)
#include "GeometryBinding.h"
#include "GraphicsContext.h"
#include "GraphicsContext3D.h"
#include "LayerRendererChromium.h"
namespace WebCore {
GeometryBinding::GeometryBinding(GraphicsContext3D* context)
: m_context(context)
, m_quadVerticesVbo(0)
, m_quadElementsVbo(0)
, m_initialized(false)
{
// Vertex positions and texture coordinates for the 4 corners of a 1x1 quad.
float vertices[] = { -0.5f, 0.5f, 0.0f, 0.0f, 1.0f,
-0.5f, -0.5f, 0.0f, 0.0f, 0.0f,
0.5f, -0.5f, 0.0f, 1.0f, 0.0f,
0.5f, 0.5f, 0.0f, 1.0f, 1.0f };
uint16_t indices[] = { 0, 1, 2, 0, 2, 3, // The two triangles that make up the layer quad.
0, 1, 2, 3}; // A line path for drawing the layer border.
GLC(m_context, m_quadVerticesVbo = m_context->createBuffer());
GLC(m_context, m_quadElementsVbo = m_context->createBuffer());
GLC(m_context, m_context->bindBuffer(GraphicsContext3D::ARRAY_BUFFER, m_quadVerticesVbo));
GLC(m_context, m_context->bufferData(GraphicsContext3D::ARRAY_BUFFER, sizeof(vertices), vertices, GraphicsContext3D::STATIC_DRAW));
GLC(m_context, m_context->bindBuffer(GraphicsContext3D::ELEMENT_ARRAY_BUFFER, m_quadElementsVbo));
GLC(m_context, m_context->bufferData(GraphicsContext3D::ELEMENT_ARRAY_BUFFER, sizeof(indices), indices, GraphicsContext3D::STATIC_DRAW));
m_initialized = true;
}
GeometryBinding::~GeometryBinding()
{
GLC(m_context, m_context->deleteBuffer(m_quadVerticesVbo));
GLC(m_context, m_context->deleteBuffer(m_quadElementsVbo));
}
void GeometryBinding::prepareForDraw()
{
GLC(m_context, m_context->bindBuffer(GraphicsContext3D::ARRAY_BUFFER, quadVerticesVbo()));
GLC(m_context, m_context->bindBuffer(GraphicsContext3D::ELEMENT_ARRAY_BUFFER, quadElementsVbo()));
unsigned offset = 0;
GLC(m_context, m_context->vertexAttribPointer(positionAttribLocation(), 3, GraphicsContext3D::FLOAT, false, 5 * sizeof(float), offset));
offset += 3 * sizeof(float);
GLC(m_context, m_context->vertexAttribPointer(texCoordAttribLocation(), 2, GraphicsContext3D::FLOAT, false, 5 * sizeof(float), offset));
GLC(m_context, m_context->enableVertexAttribArray(positionAttribLocation()));
GLC(m_context, m_context->enableVertexAttribArray(texCoordAttribLocation()));
}
} // namespace WebCore
#endif // USE(ACCELERATED_COMPOSITING)
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