1 files changed, 96 insertions, 0 deletions
diff --git a/WebCore/platform/graphics/chromium/CanvasLayerChromium.cpp b/WebCore/platform/graphics/chromium/CanvasLayerChromium.cpp
new file mode 100644
index 0000000..7e732d1
--- /dev/null
+++ b/WebCore/platform/graphics/chromium/CanvasLayerChromium.cpp
@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2010 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:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
+ * OWNER 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 USE(ACCELERATED_COMPOSITING)
+
+#include "CanvasLayerChromium.h"
+
+#include "GraphicsContext3D.h"
+#include <GLES2/gl2.h>
+
+namespace WebCore {
+
+unsigned CanvasLayerChromium::m_shaderProgramId = 0;
+
+PassRefPtr<CanvasLayerChromium> CanvasLayerChromium::create(GraphicsLayerChromium* owner)
+{
+    return adoptRef(new CanvasLayerChromium(owner));
+}
+
+CanvasLayerChromium::CanvasLayerChromium(GraphicsLayerChromium* owner)
+    : LayerChromium(owner)
+    , m_context(0)
+    , m_textureId(0)
+    , m_textureChanged(false)
+{
+}
+
+unsigned CanvasLayerChromium::textureId()
+{
+    return m_textureId;
+}
+
+void CanvasLayerChromium::updateTextureContents(unsigned textureId)
+{
+    ASSERT(textureId == m_textureId);
+    ASSERT(m_context);
+    if (m_textureChanged) {
+        glBindTexture(GL_TEXTURE_2D, m_textureId);
+        // Set the min-mag filters to linear and wrap modes to GL_CLAMP_TO_EDGE
+        // to get around NPOT texture limitations of GLES.
+        glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+        glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+        glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+        glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+        m_textureChanged = false;
+    }
+    // Update the contents of the texture used by the compositor.
+    if (m_contentsDirty) {
+        if (m_prepareTextureCallback)
+            m_prepareTextureCallback->willPrepareTexture();
+        m_context->prepareTexture();
+        m_contentsDirty = false;
+    }
+}
+
+void CanvasLayerChromium::setContext(const GraphicsContext3D* context)
+{
+    m_context = const_cast<GraphicsContext3D*>(context);
+
+    unsigned int textureId = m_context->platformTexture();
+    if (textureId != m_textureId)
+        m_textureChanged = true;
+    m_textureId = textureId;
+}
+
+}
+#endif // USE(ACCELERATED_COMPOSITING)