1 files changed, 139 insertions, 0 deletions
diff --git a/vcl/inc/opengl/texture.hxx b/vcl/inc/opengl/texture.hxx
new file mode 100644
index 000000000..0438b9af1
--- /dev/null
+++ b/vcl/inc/opengl/texture.hxx
@@ -0,0 +1,139 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_VCL_INC_OPENGL_TEXTURE_H
+#define INCLUDED_VCL_INC_OPENGL_TEXTURE_H
+
+#include <epoxy/gl.h>
+#include <vcl/dllapi.h>
+#include <vcl/salgtype.hxx>
+#include <rtl/ustring.hxx>
+#include <tools/gen.hxx>
+
+#include <functional>
+#include <memory>
+#include <vector>
+
+class ImplOpenGLTexture
+{
+public:
+    GLuint mnTexture;
+    int    mnWidth;
+    int    mnHeight;
+    GLenum mnFilter;
+    GLuint mnOptStencil;
+
+    std::unique_ptr<std::vector<int>> mpSlotReferences;
+    std::function<void(int)> mFunctSlotDeallocateCallback;
+
+    ImplOpenGLTexture( int nWidth, int nHeight, bool bAllocate );
+    ImplOpenGLTexture( int nWidth, int nHeight, int nFormat, int nType, void const * pData );
+    ImplOpenGLTexture( int nX, int nY, int nWidth, int nHeight );
+    ~ImplOpenGLTexture();
+
+    bool InsertBuffer(int nX, int nY, int nWidth, int nHeight, int nFormat, int nType, sal_uInt8 const * pData);
+
+    void IncreaseRefCount(int nSlotNumber);
+    void DecreaseRefCount(int nSlotNumber);
+
+    void InitializeSlotMechanism(int nInitialSlotSize);
+
+    void SetSlotDeallocateCallback(std::function<void(int)> aCallback)
+    {
+        mFunctSlotDeallocateCallback = aCallback;
+    }
+
+    void ResetSlotDeallocateCallback()
+    {
+        mFunctSlotDeallocateCallback = std::function<void(int)>();
+    }
+
+    GLuint AddStencil();
+};
+
+class VCL_DLLPUBLIC OpenGLTexture final
+{
+private:
+    // if the rect size doesn't match the mpImpl one, this instance
+    // is a sub-area from the real OpenGL texture
+    tools::Rectangle maRect;
+    std::shared_ptr<ImplOpenGLTexture> mpImpl;
+    int mnSlotNumber;
+
+    inline void GetTextureRect(const SalTwoRect& rPosAry, GLfloat& x1, GLfloat& x2, GLfloat& y1, GLfloat& y2) const;
+
+    bool IsValid() const
+    {
+        return (mpImpl && mpImpl->mnTexture != 0);
+    }
+
+public:
+                    OpenGLTexture();
+                    OpenGLTexture(const std::shared_ptr<ImplOpenGLTexture>& pImpl, tools::Rectangle aRectangle, int nSlotNumber);
+
+                    OpenGLTexture( int nWidth, int nHeight, bool bAllocate = true );
+                    OpenGLTexture( int nWidth, int nHeight, int nFormat, int nType, void const * pData );
+                    OpenGLTexture( int nX, int nY, int nWidth, int nHeight );
+                    OpenGLTexture( const OpenGLTexture& rTexture );
+                    OpenGLTexture( OpenGLTexture&& rTexture ) noexcept;
+                    OpenGLTexture( const OpenGLTexture& rTexture, int nX, int nY, int nWidth, int nHeight );
+                    ~OpenGLTexture();
+
+    bool            IsUnique() const;
+
+    GLuint          Id() const;
+    int             GetWidth() const;
+    int             GetHeight() const;
+
+    void            GetCoord( GLfloat* pCoord, const SalTwoRect& rPosAry, bool bInverted=false ) const;
+    void            GetWholeCoord( GLfloat* pCoord ) const;
+    void            Bind();
+    void            Unbind();
+    void            Read( GLenum nFormat, GLenum nType, sal_uInt8* pData );
+    GLuint          AddStencil();
+    GLuint          StencilId() const;
+
+    bool            CopyData(int nWidth, int nHeight, int nFormat, int nType, sal_uInt8 const * pData);
+
+    void            SaveToFile(const OUString& rFileName);
+
+    GLenum          GetFilter() const;
+    void            SetFilter( GLenum nFilter );
+
+                    operator bool() const;
+    OpenGLTexture&  operator=( const OpenGLTexture& rTexture );
+    OpenGLTexture&  operator=( OpenGLTexture&& rTexture );
+    bool            operator==( const OpenGLTexture& rTexture ) const;
+    bool            operator!=( const OpenGLTexture& rTexture ) const;
+
+    template<GLenum type>
+    void FillCoords(std::vector<GLfloat>& aCoordVector, const SalTwoRect& rPosAry) const;
+};
+
+template<> void OpenGLTexture::FillCoords<GL_TRIANGLES>(
+    std::vector<GLfloat>& aCoord, const SalTwoRect& rPosAry)
+    const;
+
+template<> void OpenGLTexture::FillCoords<GL_TRIANGLE_FAN>(
+    std::vector<GLfloat>& aCoord, const SalTwoRect& rPosAry)
+    const;
+
+#endif // INCLUDED_VCL_INC_OPENGL_TEXTURE_H
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */