99 lines
2.5 KiB
C++
99 lines
2.5 KiB
C++
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#ifndef SHADINGCONTEXT_H
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#define SHADINGCONTEXT_H
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// Glew include
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#include <GL/glew.h>
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// TnzCore includes
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#include "traster.h"
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// Qt includes
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#include <QDateTime>
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#include <QGLFramebufferObjectFormat>
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#undef DVAPI
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#undef DVVAR
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#ifdef TNZSTDFX_EXPORTS
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#define DVAPI DV_EXPORT_API
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#define DVVAR DV_EXPORT_VAR
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#else
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#define DVAPI DV_IMPORT_API
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#define DVVAR DV_IMPORT_VAR
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#endif
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//=========================================================
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// Forward declarations
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class QObject;
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class QGLShaderProgram;
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class QDateTime;
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//=========================================================
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class DVAPI ShadingContext
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{
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public:
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enum Support {
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OK,
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NO_PIXEL_BUFFER,
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NO_SHADERS
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};
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public:
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ShadingContext();
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~ShadingContext();
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//! Returns the status of OpenGL shading support.
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static Support support();
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bool isValid() const;
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void makeCurrent();
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void doneCurrent();
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/*!
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Resizes the output buffer to the specified size. Requires that
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the contex is made current before invocation. In case lx or ly are 0,
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the context's output buffer is destroyed.
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*/
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void resize(int lx, int ly,
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const QGLFramebufferObjectFormat &fmt = QGLFramebufferObjectFormat());
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QGLFramebufferObjectFormat format() const;
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TDimension size() const;
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//! Surrenders ownership of the supplied shader program to the shading context.
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void addShaderProgram(const QString &shaderName, QGLShaderProgram *program);
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void addShaderProgram(const QString &shaderName, QGLShaderProgram *program,
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const QDateTime &lastModified);
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bool removeShaderProgram(const QString &shaderName);
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QGLShaderProgram *shaderProgram(const QString &shaderName) const;
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QDateTime lastModified(const QString &shaderName) const;
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std::pair<QGLShaderProgram *, QDateTime> shaderData(const QString &shaderName) const;
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GLuint loadTexture(const TRasterP &src, GLuint texUnit); //!< Loads a texture and binds it to the specified texture unit.
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//! \return The OpenGL texture id of the loaded texture. \param src Loaded texture. \param texUnit Unit the texture will be bound to.
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void unloadTexture(GLuint texId); //!< Releases the specified texture id.
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//! Renders the active shader program to the specified raster.
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void draw(const TRasterP &dst);
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//! Performs transform feedback with the specified varying variables
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void transformFeedback(int varyingsCount, const GLsizeiptr *varyingSizes,
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GLvoid **bufs);
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private:
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struct Imp;
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Imp *m_imp;
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// Not copyable
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ShadingContext(const ShadingContext &);
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ShadingContext &operator=(const ShadingContext &);
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};
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#endif // SHADINGCONTEXT_H
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