1 files changed, 61 insertions, 0 deletions
diff --git a/cc/GeometryBinding.cpp b/cc/GeometryBinding.cpp
new file mode 100644
index 0000000..65ee243
--- /dev/null
+++ b/cc/GeometryBinding.cpp
@@ -0,0 +1,61 @@
+// Copyright 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "config.h"
+
+#if USE(ACCELERATED_COMPOSITING)
+
+#include "GeometryBinding.h"
+
+#include "CCRendererGL.h" // For the GLC() macro.
+#include "GraphicsContext3D.h"
+#include <public/WebGraphicsContext3D.h>
+
+namespace WebCore {
+
+GeometryBinding::GeometryBinding(WebKit::WebGraphicsContext3D* context, const FloatRect& quadVertexRect)
+    : 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[] = { quadVertexRect.x(), quadVertexRect.maxY(), 0.0f, 0.0f,  1.0f,
+                         quadVertexRect.x(), quadVertexRect.y(), 0.0f, 0.0f,  0.0f,
+                         quadVertexRect.maxX(), quadVertexRect.y(), 0.0f, 1.0f,  0.0f,
+                         quadVertexRect.maxX(),  quadVertexRect.maxY(), 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)