1 files changed, 118 insertions, 0 deletions
diff --git a/cc/io_surface_layer_impl.cc b/cc/io_surface_layer_impl.cc
new file mode 100644
index 0000000..689a003
--- /dev/null
+++ b/cc/io_surface_layer_impl.cc
@@ -0,0 +1,118 @@
+// Copyright 2012 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 "CCIOSurfaceLayerImpl.h"
+
+#include "base/stringprintf.h"
+#include "CCGraphicsContext.h"
+#include "CCIOSurfaceDrawQuad.h"
+#include "CCLayerTreeHostImpl.h"
+#include "CCQuadSink.h"
+#include "CCRendererGL.h" // For the GLC() macro.
+#include "Extensions3D.h"
+#include <public/WebGraphicsContext3D.h>
+
+namespace cc {
+
+CCIOSurfaceLayerImpl::CCIOSurfaceLayerImpl(int id)
+    : CCLayerImpl(id)
+    , m_ioSurfaceId(0)
+    , m_ioSurfaceChanged(false)
+    , m_ioSurfaceTextureId(0)
+{
+}
+
+CCIOSurfaceLayerImpl::~CCIOSurfaceLayerImpl()
+{
+    if (!m_ioSurfaceTextureId)
+        return;
+
+    CCGraphicsContext* context = layerTreeHostImpl()->context();
+    // FIXME: Implement this path for software compositing.
+    WebKit::WebGraphicsContext3D* context3d = context->context3D();
+    if (context3d)
+        context3d->deleteTexture(m_ioSurfaceTextureId);
+}
+
+void CCIOSurfaceLayerImpl::willDraw(CCResourceProvider* resourceProvider)
+{
+    CCLayerImpl::willDraw(resourceProvider);
+
+    if (m_ioSurfaceChanged) {
+        WebKit::WebGraphicsContext3D* context3d = resourceProvider->graphicsContext3D();
+        if (!context3d) {
+            // FIXME: Implement this path for software compositing.
+            return;
+        }
+
+        // FIXME: Do this in a way that we can track memory usage.
+        if (!m_ioSurfaceTextureId)
+            m_ioSurfaceTextureId = context3d->createTexture();
+
+        GLC(context3d, context3d->activeTexture(GraphicsContext3D::TEXTURE0));
+        GLC(context3d, context3d->bindTexture(Extensions3D::TEXTURE_RECTANGLE_ARB, m_ioSurfaceTextureId));
+        GLC(context3d, context3d->texParameteri(Extensions3D::TEXTURE_RECTANGLE_ARB, GraphicsContext3D::TEXTURE_MIN_FILTER, GraphicsContext3D::LINEAR));
+        GLC(context3d, context3d->texParameteri(Extensions3D::TEXTURE_RECTANGLE_ARB, GraphicsContext3D::TEXTURE_MAG_FILTER, GraphicsContext3D::LINEAR));
+        GLC(context3d, context3d->texParameteri(Extensions3D::TEXTURE_RECTANGLE_ARB, GraphicsContext3D::TEXTURE_WRAP_S, GraphicsContext3D::CLAMP_TO_EDGE));
+        GLC(context3d, context3d->texParameteri(Extensions3D::TEXTURE_RECTANGLE_ARB, GraphicsContext3D::TEXTURE_WRAP_T, GraphicsContext3D::CLAMP_TO_EDGE));
+        context3d->texImageIOSurface2DCHROMIUM(Extensions3D::TEXTURE_RECTANGLE_ARB,
+                                               m_ioSurfaceSize.width(),
+                                               m_ioSurfaceSize.height(),
+                                               m_ioSurfaceId,
+                                               0);
+        // Do not check for error conditions. texImageIOSurface2DCHROMIUM is supposed to hold on to
+        // the last good IOSurface if the new one is already closed. This is only a possibility
+        // during live resizing of plugins. However, it seems that this is not sufficient to
+        // completely guard against garbage being drawn. If this is found to be a significant issue,
+        // it may be necessary to explicitly tell the embedder when to free the surfaces it has
+        // allocated.
+        m_ioSurfaceChanged = false;
+    }
+}
+
+void CCIOSurfaceLayerImpl::appendQuads(CCQuadSink& quadSink, CCAppendQuadsData& appendQuadsData)
+{
+    CCSharedQuadState* sharedQuadState = quadSink.useSharedQuadState(createSharedQuadState());
+    appendDebugBorderQuad(quadSink, sharedQuadState, appendQuadsData);
+
+    IntRect quadRect(IntPoint(), contentBounds());
+    quadSink.append(CCIOSurfaceDrawQuad::create(sharedQuadState, quadRect, m_ioSurfaceSize, m_ioSurfaceTextureId, CCIOSurfaceDrawQuad::Flipped).PassAs<CCDrawQuad>(), appendQuadsData);
+}
+
+void CCIOSurfaceLayerImpl::dumpLayerProperties(std::string* str, int indent) const
+{
+    str->append(indentString(indent));
+    base::StringAppendF(str, "iosurface id: %u texture id: %u\n", m_ioSurfaceId, m_ioSurfaceTextureId);
+    CCLayerImpl::dumpLayerProperties(str, indent);
+}
+
+void CCIOSurfaceLayerImpl::didLoseContext()
+{
+    // We don't have a valid texture ID in the new context; however,
+    // the IOSurface is still valid.
+    m_ioSurfaceTextureId = 0;
+    m_ioSurfaceChanged = true;
+}
+
+void CCIOSurfaceLayerImpl::setIOSurfaceProperties(unsigned ioSurfaceId, const IntSize& size)
+{
+    if (m_ioSurfaceId != ioSurfaceId)
+        m_ioSurfaceChanged = true;
+
+    m_ioSurfaceId = ioSurfaceId;
+    m_ioSurfaceSize = size;
+}
+
+const char* CCIOSurfaceLayerImpl::layerTypeAsString() const
+{
+    return "IOSurfaceLayer";
+}
+
+}
+
+#endif // USE(ACCELERATED_COMPOSITING)