vcl: Only load OpenGL shaders once for each context

Change-Id: Idbf9026c5e64ef41d4c913153dfddf36923ff7de

3 files changed, 73 insertions, 11 deletions

diff --git a/vcl/inc/opengl/program.hxx b/vcl/inc/opengl/program.hxx
new file mode 100644
index 000000000000..4b2b26ffb95e
--- /dev/null
+++ b/vcl/inc/opengl/program.hxx
@@ -0,0 +1,72 @@
+/* -*- 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/.
+ */
+
+#ifndef INCLUDED_VCL_INC_OPENGL_PROGRAM_H
+#define INCLUDED_VCL_INC_OPENGL_PROGRAM_H
+
+#include <GL/glew.h>
+#include <vcl/dllapi.h>
+
+#include <basegfx/point/b2dpoint.hxx>
+#include <rtl/ustring.hxx>
+#include <tools/color.hxx>
+#include <opengl/texture.hxx>
+
+#include <boost/unordered_map.hpp>
+
+typedef boost::unordered_map< OString, GLuint, OStringHash > UniformCache;
+typedef std::list< OpenGLTexture > TextureList;
+
+class VCL_PLUGIN_PUBLIC OpenGLProgram
+{
+private:
+    GLuint          mnId;
+    UniformCache    maUniformLocations;
+    sal_uInt32      mnEnabledAttribs;
+    GLuint          mnAttribIndex;
+    GLuint          mnPositionAttrib;
+    GLuint          mnTexCoordAttrib;
+    GLuint          mnAlphaCoordAttrib;
+    TextureList     maTextures;
+    bool            mbBlending;
+
+public:
+    OpenGLProgram();
+    ~OpenGLProgram();
+
+    bool Load( const OUString& rVertexShader, const OUString& rFragmentShader );
+    bool Use();
+    bool Clean();
+
+    void SetVertices( const GLvoid* pData );
+    void SetTextureCoord( const GLvoid* pData );
+    void SetAlphaCoord( const GLvoid* pData );
+
+    void SetUniform2f( const OString& rName, GLfloat v1, GLfloat v2 );
+    void SetUniform1fv( const OString& rName, GLsizei nCount, GLfloat* aValues );
+    void SetUniform2fv( const OString& rName, GLsizei nCount, GLfloat* aValues );
+    void SetColor( const OString& rName, SalColor nColor, sal_uInt8 nTransparency );
+    void SetColorf( const OString& rName, SalColor nColor, double fTransparency );
+    void SetColorWithIntensity( const OString& rName, const Color& rColor, long nFactor );
+    void SetTexture( const OString& rName, OpenGLTexture& rTexture );
+    void SetTransform( const OString& rName, const OpenGLTexture& rTexture,
+                       const basegfx::B2DPoint& rNull, const basegfx::B2DPoint& rX,
+                       const basegfx::B2DPoint& rY );
+    void SetBlendMode( GLenum nSFactor, GLenum nDFactor );
+
+    bool DrawTexture( OpenGLTexture& rTexture );
+
+protected:
+    void SetVertexAttrib( GLuint& rAttrib, const OString& rName, const GLvoid* pData );
+    GLuint GetUniformLocation( const OString& rName );
+};
+
+#endif // INCLUDED_VCL_INC_OPENGL_PROGRAM_H
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/vcl/inc/opengl/salbmp.hxx b/vcl/inc/opengl/salbmp.hxx
index bc232b123380..6938a22a1846 100644
--- a/vcl/inc/opengl/salbmp.hxx
+++ b/vcl/inc/opengl/salbmp.hxx
@@ -99,17 +99,6 @@ private:
 
 private:
 
-    GLuint          ImplGetTextureProgram();
-    GLuint          mnTexProgram;
-    GLuint          mnTexSamplerUniform;
-
-    GLuint          ImplGetConvolutionProgram();
-    GLuint          mnConvProgram;
-    GLuint          mnConvSamplerUniform;
-    GLuint          mnConvKernelUniform;
-    GLuint          mnConvKernelSizeUniform;
-    GLuint          mnConvOffsetsUniform;
-
     bool ImplScaleFilter( const double& rScaleX, const double& rScaleY, GLenum nFilter );
     void ImplCreateKernel( const double& fScale, const Kernel& rKernel, GLfloat*& pWeights, sal_uInt32& aKernelSize );
     bool ImplScaleConvolution( const double& rScaleX, const double& rScaleY, const Kernel& aKernel );
diff --git a/vcl/inc/opengl/texture.hxx b/vcl/inc/opengl/texture.hxx
index ad4738a6948d..3d99526d2646 100644
--- a/vcl/inc/opengl/texture.hxx
+++ b/vcl/inc/opengl/texture.hxx
@@ -65,6 +65,7 @@ public:
     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();