1 files changed, 171 insertions, 0 deletions
diff --git a/Source/WebCore/platform/graphics/blackberry/LayerFilterRenderer.h b/Source/WebCore/platform/graphics/blackberry/LayerFilterRenderer.h
new file mode 100644
index 000000000..1c1f06e03
--- /dev/null
+++ b/Source/WebCore/platform/graphics/blackberry/LayerFilterRenderer.h
@@ -0,0 +1,171 @@
+/*
+ * Copyright (C) 2012 Research In Motion Limited. All rights reserved.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifndef LayerFilterRenderer_h
+#define LayerFilterRenderer_h
+
+#if USE(ACCELERATED_COMPOSITING) && ENABLE(CSS_FILTERS)
+
+#include "IntRect.h"
+#include "LayerData.h"
+#include "OwnPtr.h"
+#include "Texture.h"
+#include "TransformationMatrix.h"
+
+#include <BlackBerryPlatformGLES2Context.h>
+#include <BlackBerryPlatformIntRectRegion.h>
+#include <wtf/HashSet.h>
+#include <wtf/Noncopyable.h>
+#include <wtf/PassOwnPtr.h>
+#include <wtf/Vector.h>
+
+namespace WebCore {
+
+class LayerCompositingThread;
+class LayerFilterRenderer;
+class LayerFilterRendererAction;
+class LayerRendererSurface;
+
+class Uniformf : public RefCounted<Uniformf> {
+    WTF_MAKE_NONCOPYABLE(Uniformf);
+public:
+    virtual void apply() = 0;
+
+protected:
+    Uniformf(int location);
+    const int& location() const { return m_location; }
+
+private:
+    int m_location;
+};
+
+class Uniform1f : public Uniformf {
+public:
+    static PassRefPtr<Uniformf> create(int location, float val);
+
+protected:
+    Uniform1f(int location, float val);
+
+private:
+    virtual void apply();
+    float m_val;
+};
+
+class Uniform2f : public Uniformf {
+public:
+    static PassRefPtr<Uniformf> create(int location, float val0, float val1);
+
+protected:
+    Uniform2f(int location, float val0, float val1);
+
+private:
+    virtual void apply();
+    float m_val[2];
+};
+
+class Uniform3f : public Uniformf {
+public:
+    static PassRefPtr<Uniformf> create(int location, float val0, float val1, float val2);
+
+protected:
+    Uniform3f(int location, float val0, float val1, float val2);
+
+private:
+    virtual void apply();
+    float m_val[3];
+};
+
+class LayerFilterRendererAction : public RefCounted<LayerFilterRendererAction> {
+public:
+    static PassRefPtr<LayerFilterRendererAction> create(int programId);
+        // A vector of actions must have an even count, so if you have an odd count, add a passthrough event at the end.
+        // See the ping-pong note in LayerFilterRenderer::applyActions.
+    ~LayerFilterRendererAction();
+
+    bool shouldPushSnapshot() const { return m_pushSnapshot; }
+    void setPushSnapshot() { m_pushSnapshot = true; }
+
+    bool shouldPopSnapshot() const { return m_popSnapshot; }
+    void setPopSnapshot() { m_popSnapshot = true; }
+
+    void appendUniform(const RefPtr<Uniformf>& uniform) { m_uniforms.append(uniform); }
+    void useActionOn(LayerFilterRenderer*);
+
+protected:
+    int m_programId;
+    bool m_pushSnapshot;
+    bool m_popSnapshot;
+
+    Vector<RefPtr<Uniformf> > m_uniforms;
+private:
+    LayerFilterRendererAction(int programId);
+};
+
+class LayerFilterRenderer {
+    WTF_MAKE_NONCOPYABLE(LayerFilterRenderer);
+
+public:
+    static PassOwnPtr<LayerFilterRenderer> create(const int& positionLocation, const int& texCoordLocation);
+    void applyActions(unsigned& fbo, LayerCompositingThread*, Vector<RefPtr<LayerFilterRendererAction> >);
+    Vector<RefPtr<LayerFilterRendererAction> > actionsForOperations(LayerRendererSurface*, const Vector<RefPtr<FilterOperation> >&);
+
+    // If initialization fails, or disable() is called, this is false.
+    bool isEnabled() const { return m_enabled; }
+    void disable() { m_enabled = false; }
+
+private:
+    LayerFilterRenderer(const int& positionLocation, const int& texCoordLocation);
+    void bindCommonAttribLocation(int location, const char* attribName);
+    bool initializeSharedGLObjects();
+
+    // See note about ping-ponging in applyActions()
+    void ping(LayerRendererSurface*);
+    void pong(LayerRendererSurface*);
+
+    // This is for shadows, where we need to create a shadow, and then repaint the original image
+    // on top of the shadow.
+    void pushSnapshot(LayerRendererSurface*, int sourceId);
+    void popSnapshot();
+
+    bool m_enabled;
+
+    // ESSL attributes shared with LayerRenderer - see constructor:
+    const int m_positionLocation;
+    const int m_texCoordLocation;
+
+    // ESSL program object IDs:
+    unsigned m_cssFilterProgramObject[LayerData::NumberOfCSSFilterShaders];
+
+    // ESSL uniform locations:
+    int m_amountLocation[LayerData::NumberOfCSSFilterShaders];
+    int m_blurAmountLocation[2]; // 0 = Y, 1 = X
+    int m_shadowColorLocation;
+    int m_offsetLocation;
+
+    // Textures for playing ping-pong - see note in applyActions()
+    RefPtr<Texture> m_texture;
+    RefPtr<Texture> m_snapshotTexture;
+
+    friend class LayerFilterRendererAction;
+};
+
+}
+
+#endif // USE(ACCELERATED_COMPOSITING) && ENABLE(CSS_FILTERS)
+
+#endif // LayerFilterRenderer_h