vcl/inc/opengl/program.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  */
   9
  10 #ifndef INCLUDED_VCL_INC_OPENGL_PROGRAM_H
  11 #define INCLUDED_VCL_INC_OPENGL_PROGRAM_H
  12
  13 #include <sal/config.h>
  14
  15 #include <vector>
  16
  17 #include <vcl/dllapi.h>
  18
  19 #include <basegfx/point/b2dpoint.hxx>
  20 #include <rtl/ustring.hxx>
  21 #include <opengl/texture.hxx>
  22
  23 #include <unordered_map>
  24
  25 class Color;
  26
  27 enum class TextureShaderType
  28 {
  29     Normal = 0,
  30     Blend,
  31     Masked,
  32     Diff,
  33     MaskedColor
  34 };
  35
  36 enum class DrawShaderType
  37 {
  38     Normal = 0,
  39     Line
  40 };
  41
  42 class OpenGLProgram
  43 {
  44 private:
  45     GLuint          mnId;
  46     std::unordered_map< OString, GLuint >
  47                     maUniformLocations;
  48     sal_uInt32      mnEnabledAttribs;
  49     GLuint          mnPositionAttrib;
  50     GLuint          mnTexCoordAttrib;
  51     GLuint          mnAlphaCoordAttrib;
  52     GLuint          mnMaskCoordAttrib;
  53     GLuint          mnExtrusionVectorsAttrib;
  54     GLuint          mnVertexColorsAttrib;
  55
  56     std::vector< OpenGLTexture >     maTextures;
  57     bool            mbBlending;
  58
  59     float mfLastWidth;
  60     float mfLastHeight;
  61     float mfLastPixelOffset;
  62
  63
  64     OpenGLProgram(const OpenGLProgram &) = delete;
  65 public:
  66     OpenGLProgram();
  67     ~OpenGLProgram();
  68
  69     GLuint Id() { return mnId; }
  70
  71     bool Load( const OUString& rVertexShader, const OUString& rFragmentShader,
  72                const OString& preamble, const OString& rDigest );
  73     void Use();
  74     void Reuse();
  75     void Clean();
  76
  77     void SetVertices( const GLvoid* pData );
  78     void SetTextureCoord( const GLvoid* pData );
  79     void SetAlphaCoord( const GLvoid* pData );
  80     void SetMaskCoord(const GLvoid* pData);
  81     void SetExtrusionVectors(const GLvoid* pData);
  82     void SetVertexColors(std::vector<GLubyte>& rColorVector);
  83
  84     void SetUniform1f( const OString& rName, GLfloat v1 );
  85     void SetUniform2f( const OString& rName, GLfloat v1, GLfloat v2 );
  86     void SetUniform1fv( const OString& rName, GLsizei nCount, GLfloat const * aValues );
  87     void SetUniform2fv( const OString& rName, GLsizei nCount, GLfloat const * aValues );
  88     void SetUniform1i( const OString& rName, GLint v1 );
  89     void SetColor( const OString& rName, const Color& rColor );
  90     void SetColor( const OString& rName, Color nColor, sal_uInt8 nTransparency );
  91     void SetColorf( const OString& rName, Color nColor, double fTransparency );
  92     void SetColorWithIntensity( const OString& rName, const Color& rColor, long nFactor );
  93     void SetTexture( const OString& rName, OpenGLTexture& rTexture );
  94     void SetTransform( const OString& rName, const OpenGLTexture& rTexture,
  95                        const basegfx::B2DPoint& rNull, const basegfx::B2DPoint& rX,
  96                        const basegfx::B2DPoint& rY );
  97     void SetIdentityTransform(const OString& rName);
  98     void SetShaderType(TextureShaderType eTextureShaderType);
  99     void SetShaderType(DrawShaderType eDrawShaderType);
 100
 101     void SetBlendMode( GLenum nSFactor, GLenum nDFactor );
 102
 103     void ApplyMatrix(float fWidth, float fHeight, float fPixelOffset = 0.0f);
 104
 105     void DrawTexture( const OpenGLTexture& rTexture );
 106
 107     void DrawArrays(GLenum aMode, std::vector<GLfloat>& aVertices);
 108     void DrawElements(GLenum aMode, GLuint nNumberOfVertices);
 109
 110     bool EnableVertexAttrib(GLuint& rAttrib, const OString& rName);
 111
 112     void SetVertexAttrib(GLuint& rAttrib, const OString& rName, GLint nSize,
 113                          GLenum eType, GLboolean bNormalized, GLsizei aStride,
 114                          const GLvoid* pPointer);
 115
 116 private:
 117     GLuint GetUniformLocation( const OString& rName );
 118 };
 119
 120 #endif // INCLUDED_VCL_INC_OPENGL_PROGRAM_H
 121
 122 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */