d18ad8a7fb
Adds native opengl polyline rendering to draw polylines, line joins and line caps as triangle strips. The vertex shader allows for the dynamic line width by calculating the correct vertex posiitons, and the fragment shader is used for anti-aliasing. Change-Id: If7982c828cae1fae59c57194c8ac77e5ad7f1d26
92 lines
3.2 KiB
C++
92 lines
3.2 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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#ifndef INCLUDED_VCL_INC_OPENGL_PROGRAM_H
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#define INCLUDED_VCL_INC_OPENGL_PROGRAM_H
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#include <sal/config.h>
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#include <list>
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#include <GL/glew.h>
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#include <vcl/dllapi.h>
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#include <basegfx/point/b2dpoint.hxx>
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#include <rtl/ustring.hxx>
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#include <tools/color.hxx>
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#include <opengl/texture.hxx>
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#include <unordered_map>
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typedef std::unordered_map< OString, GLuint, OStringHash > UniformCache;
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typedef std::list< OpenGLTexture > TextureList;
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class VCL_PLUGIN_PUBLIC OpenGLProgram
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{
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private:
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GLuint mnId;
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UniformCache maUniformLocations;
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sal_uInt32 mnEnabledAttribs;
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GLuint mnPositionAttrib;
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GLuint mnTexCoordAttrib;
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GLuint mnAlphaCoordAttrib;
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GLuint mnMaskCoordAttrib;
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GLuint mnNormalAttrib;
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TextureList maTextures;
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bool mbBlending;
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float mfLastWidth;
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float mfLastHeight;
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float mfLastPixelOffset;
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OpenGLProgram(const OpenGLProgram &) = delete;
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public:
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OpenGLProgram();
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~OpenGLProgram();
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bool Load( const OUString& rVertexShader, const OUString& rFragmentShader,
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const rtl::OString& preamble = "", const rtl::OString& rDigest = "" );
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bool Use();
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bool Clean();
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void SetVertices( const GLvoid* pData );
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void SetTextureCoord( const GLvoid* pData );
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void SetAlphaCoord( const GLvoid* pData );
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void SetMaskCoord(const GLvoid* pData);
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void SetExtrusionVectors(const GLvoid* pData);
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void SetUniform1f( const OString& rName, GLfloat v1 );
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void SetUniform2f( const OString& rName, GLfloat v1, GLfloat v2 );
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void SetUniform1fv( const OString& rName, GLsizei nCount, GLfloat* aValues );
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void SetUniform2fv( const OString& rName, GLsizei nCount, GLfloat* aValues );
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void SetUniform1i( const OString& rName, GLint v1 );
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void SetColor( const OString& rName, const Color& rColor );
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void SetColor( const OString& rName, SalColor nColor, sal_uInt8 nTransparency );
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void SetColorf( const OString& rName, SalColor nColor, double fTransparency );
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void SetColorWithIntensity( const OString& rName, const Color& rColor, long nFactor );
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void SetTexture( const OString& rName, OpenGLTexture& rTexture );
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void SetTransform( const OString& rName, const OpenGLTexture& rTexture,
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const basegfx::B2DPoint& rNull, const basegfx::B2DPoint& rX,
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const basegfx::B2DPoint& rY );
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void SetBlendMode( GLenum nSFactor, GLenum nDFactor );
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void ApplyMatrix(float fWidth, float fHeight, float fPixelOffset = 0.0f);
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bool DrawTexture( const OpenGLTexture& rTexture );
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protected:
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void SetVertexAttrib( GLuint& rAttrib, const OString& rName, const GLvoid* pData, GLint nSize = 2 );
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GLuint GetUniformLocation( const OString& rName );
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};
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#endif // INCLUDED_VCL_INC_OPENGL_PROGRAM_H
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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