1 files changed, 84 insertions, 0 deletions
diff --git a/WebCore/platform/graphics/gpu/mac/DrawingBufferMac.mm b/WebCore/platform/graphics/gpu/mac/DrawingBufferMac.mm
new file mode 100644
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+++ b/WebCore/platform/graphics/gpu/mac/DrawingBufferMac.mm
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+/*
+ * Copyright (C) 2010 Apple 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 INC. ``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 COMPUTER, INC. OR
+ * 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 ENABLE(ACCELERATED_2D_CANVAS) || ENABLE(3D_CANVAS)
+
+#include "DrawingBuffer.h"
+
+#include "WebGLLayer.h"
+
+#import "BlockExceptions.h"
+
+namespace WebCore {
+
+DrawingBuffer::DrawingBuffer(GraphicsContext3D* context, const IntSize& size)
+    : m_context(context)
+    , m_size(size)
+    , m_fbo(context->createFramebuffer())
+{
+    ASSERT(m_fbo);
+    if (!m_fbo) {
+        clear();
+        return;
+    }
+        
+    // Create the WebGLLayer
+    BEGIN_BLOCK_OBJC_EXCEPTIONS
+        m_platformLayer.adoptNS([[WebGLLayer alloc] initWithGraphicsContext3D:m_context.get()]);
+#ifndef NDEBUG
+        [m_platformLayer.get() setName:@"DrawingBuffer Layer"];
+#endif    
+    END_BLOCK_OBJC_EXCEPTIONS
+}
+
+DrawingBuffer::~DrawingBuffer()
+{
+    clear();
+}
+
+void DrawingBuffer::reset(const IntSize& newSize)
+{
+    if (!m_context)
+        return;
+        
+    if (m_size == newSize)
+        return;
+    m_size = newSize;
+
+    m_context->texImage2D(GraphicsContext3D::TEXTURE_2D, 0, GraphicsContext3D::RGBA, m_size.width(), m_size.height(), 0, GraphicsContext3D::RGBA, GraphicsContext3D::UNSIGNED_BYTE, 0);
+}
+
+#if USE(ACCELERATED_COMPOSITING)
+PlatformLayer* DrawingBuffer::platformLayer()
+{
+    return m_platformLayer.get();
+}
+#endif
+
+}
+
+#endif