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/******************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the Qt Data Visualization module.
**
** $QT_BEGIN_LICENSE:COMM$
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** $QT_END_LICENSE$
**
******************************************************************************/
//
// W A R N I N G
// -------------
//
// This file is not part of the QtDataVisualization 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 "datavisualizationglobal_p.h"
#include <QtGui/QRgb>
#include <QtGui/QLinearGradient>
#if !defined(QT_OPENGL_ES_2)
// 3D Textures are not supported by ES set
# include <QtGui/QOpenGLFunctions_2_1>
#endif
QT_BEGIN_NAMESPACE_DATAVISUALIZATION
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, bool smoothScale = true, bool clampY = false);
GLuint create3DTexture(const QVector<uchar> *data, int width, int height, int depth,
QImage::Format dataFormat);
GLuint createCubeMapTexture(const QImage &image, bool useTrilinearFiltering = false);
// Returns selection texture and inserts generated framebuffers to framebuffer parameters
GLuint createSelectionTexture(const QSize &size, GLuint &frameBuffer, GLuint &depthBuffer);
GLuint createCursorPositionTexture(const QSize &size, GLuint &frameBuffer);
GLuint createUniformTexture(const QColor &color);
GLuint createGradientTexture(const QLinearGradient &gradient);
GLuint createDepthTexture(const QSize &size, GLuint textureSize);
// Returns depth texture and inserts generated framebuffer to parameter
GLuint createDepthTextureFrameBuffer(const QSize &size, GLuint &frameBuffer, GLuint textureSize);
void deleteTexture(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);
#if !defined(QT_OPENGL_ES_2)
QOpenGLFunctions_2_1 *m_openGlFunctions_2_1; // Not owned
#endif
friend class Bars3DRenderer;
friend class Surface3DRenderer;
friend class Scatter3DRenderer;
friend class Abstract3DRenderer;
};
QT_END_NAMESPACE_DATAVISUALIZATION
#endif
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