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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc
** All rights reserved.
** For any questions to Digia, please use contact form at http://qt.digia.com
**
** This file is part of the QtDataVis3D module.
**
** Licensees holding valid Qt Enterprise licenses may use this file in
** accordance with the Qt Enterprise License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.
**
** If you have questions regarding the use of this file, please use
** contact form at http://qt.digia.com
**
****************************************************************************/
//
// W A R N I N G
// -------------
//
// This file is not part of the QtDataVis3D API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
#ifndef TEXTUREHELPER_P_H
#define TEXTUREHELPER_P_H
#include "datavis3dglobal_p.h"
#include <QOpenGLFunctions>
#include <QRgb>
QT_DATAVIS3D_BEGIN_NAMESPACE
class TextureHelper : protected QOpenGLFunctions
{
public:
TextureHelper();
~TextureHelper();
// Ownership of created texture is transferred to caller
GLuint create2DTexture(const QImage &image, bool useTrilinearFiltering = false,
bool convert = true);
GLuint create2DTexture(const uchar *image, int width, int height);
GLuint createCubeMapTexture(const QImage &image, bool useTrilinearFiltering = false);
// Returns selection framebuffer and inserts generated texture id to texture parameters
GLuint createSelectionBuffer(const QSize &size, GLuint &texture, GLuint &depthTexture);
// Returns selection texture and inserts generated framebuffers to framebuffer parameters
GLuint createSelectionTexture(const QSize &size, GLuint &frameBuffer, GLuint &depthBuffer);
#if !defined(QT_OPENGL_ES_2)
// Returns depth texture and inserts generated framebuffer to parameter
GLuint createDepthTexture(const QSize &size, GLuint &frameBuffer, GLuint textureSize = 1);
#endif
void deleteTexture(const GLuint *texture);
private:
QImage convertToGLFormat(const QImage &srcImage);
void convertToGLFormatHelper(QImage &dstImage, const QImage &srcImage, GLenum texture_format);
QRgb qt_gl_convertToGLFormatHelper(QRgb src_pixel, GLenum texture_format);
friend class Bars3DRenderer;
friend class Surface3DRenderer;
friend class Scatter3DRenderer;
};
QT_DATAVIS3D_END_NAMESPACE
#endif
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