d72a9239b4
Make sure shaders are supported before trying to load them. svn path=/branches/work/kwin_composite/; revision=645060
93 lines
2.3 KiB
C++
93 lines
2.3 KiB
C++
/*****************************************************************
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KWin - the KDE window manager
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This file is part of the KDE project.
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Copyright (C) 2006-2007 Rivo Laks <rivolaks@hot.ee>
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You can Freely distribute this program under the GNU General Public
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License. See the file "COPYING" for the exact licensing terms.
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******************************************************************/
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#ifndef KWIN_GLUTILS_H
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#define KWIN_GLUTILS_H
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#include "utils.h"
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#include <QStringList>
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#ifdef HAVE_OPENGL
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#include <GL/gl.h>
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#include <GL/glx.h>
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#endif
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#include "glutils_funcs.h"
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template< class K, class V > class QHash;
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namespace KWinInternal
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{
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// Initializes GLX function pointers
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void initGLX();
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// Initializes OpenGL stuff. This includes resolving function pointers as
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// well as checking for GL version and extensions
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// Note that GL context has to be created by the time this function is called
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void initGL();
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// Number of supported texture units
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extern int glTextureUnitsCount;
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bool hasGLVersion(int major, int minor, int release = 0);
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bool hasGLXVersion(int major, int minor, int release = 0);
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// use for both OpenGL and GLX extensions
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bool hasGLExtension(const QString& extension);
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inline bool isPowerOfTwo( int x ) { return (( x & ( x - 1 )) == 0 ); }
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#ifdef HAVE_OPENGL
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class GLShader
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{
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public:
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GLShader(const QString& vertexfile, const QString& fragmentfile);
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bool isValid() const { return mValid; }
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void bind();
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void unbind();
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int uniformLocation(const QString& name);
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bool setUniform(const QString& name, float value);
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bool setUniform(const QString& name, int value);
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int attributeLocation(const QString& name);
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bool setAttribute(const QString& name, float value);
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static void initStatic();
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static bool fragmentShaderSupported() { return mFragmentShaderSupported; }
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static bool vertexShaderSupported() { return mVertexShaderSupported; }
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protected:
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bool loadFromFiles(const QString& vertexfile, const QString& fragmentfile);
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bool load(const QString& vertexsource, const QString& fragmentsource);
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private:
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unsigned int mProgram;
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bool mValid;
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QHash< QString, int >* mVariableLocations;
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static bool mFragmentShaderSupported;
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static bool mVertexShaderSupported;
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};
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#endif
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} // namespace
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#endif
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