Long live QOpenGLTexture!

Task-number: QTBUG-33274
Change-Id: I9259d947d11f8ba330a2cd7f5620d8f1af0a804b
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>
Reviewed-by: Gunnar Sletta <gunnar.sletta@digia.com>

1 files changed, 164 insertions, 0 deletions

diff --git a/src/gui/opengl/qopengltexture_p.h b/src/gui/opengl/qopengltexture_p.h
new file mode 100644
index 0000000000..009561533b
--- /dev/null
+++ b/src/gui/opengl/qopengltexture_p.h
@@ -0,0 +1,164 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Klaralvdalens Datakonsult AB (KDAB).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtGui module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QABSTRACTOPENGLTEXTURE_P_H
+#define QABSTRACTOPENGLTEXTURE_P_H
+
+#ifndef QT_NO_OPENGL
+
+#include "private/qobject_p.h"
+#include "qopengltexture.h"
+#include "qopengl.h"
+
+#include <cmath>
+
+namespace {
+inline double qLog2(const double x)
+{
+    return std::log(x) / std::log(2.0);
+}
+}
+
+QT_BEGIN_NAMESPACE
+
+class QOpenGLContext;
+class QOpenGLTextureHelper;
+
+class QOpenGLTexturePrivate
+{
+public:
+    QOpenGLTexturePrivate(QOpenGLTexture::Target textureTarget,
+                          QOpenGLTexture *qq);
+    ~QOpenGLTexturePrivate();
+
+    Q_DECLARE_PUBLIC(QOpenGLTexture)
+
+    void resetFuncs(QOpenGLTextureHelper *funcs);
+    void initializeOpenGLFunctions();
+
+    bool create();
+    void destroy();
+
+    void bind();
+    void bind(uint unit, QOpenGLTexture::TextureUnitReset reset = QOpenGLTexture::DontResetTextureUnit);
+    void release();
+    void release(uint unit, QOpenGLTexture::TextureUnitReset reset = QOpenGLTexture::DontResetTextureUnit);
+    bool isBound() const;
+    bool isBound(uint unit) const;
+
+    void allocateStorage();
+    void allocateMutableStorage();
+    void allocateImmutableStorage();
+    void setData(int mipLevel, int layer, QOpenGLTexture::CubeMapFace cubeFace,
+                 QOpenGLTexture::PixelFormat sourceFormat, QOpenGLTexture::PixelType sourceType,
+                 void *data, const QOpenGLPixelTransferOptions * const options);
+    void setCompressedData(int mipLevel, int layer, QOpenGLTexture::CubeMapFace cubeFace,
+                           int dataSize, void *data,
+                           const QOpenGLPixelTransferOptions * const options);
+
+    void setWrapMode(QOpenGLTexture::WrapMode mode);
+    void setWrapMode(QOpenGLTexture::CoordinateDirection direction, QOpenGLTexture::WrapMode mode);
+    QOpenGLTexture::WrapMode wrapMode(QOpenGLTexture::CoordinateDirection direction) const;
+
+    QOpenGLTexture *createTextureView(QOpenGLTexture::Target target, QOpenGLTexture::TextureFormat viewFormat,
+                                      int minimumMipmapLevel, int maximumMipmapLevel,
+                                      int minimumLayer, int maximumLayer) const;
+
+    int evaluateMipLevels() const;
+
+    inline int maximumMipLevelCount() const
+    {
+        return 1 + std::floor(qLog2(qMax(dimensions[0], qMax(dimensions[1], dimensions[2]))));
+    }
+
+    static inline int mipLevelSize(int mipLevel, int baseLevelSize)
+    {
+        return std::floor(double(qMax(1, baseLevelSize >> mipLevel)));
+    }
+
+    QOpenGLTexture *q_ptr;
+    QOpenGLContext *context;
+    QOpenGLTexture::Target target;
+    QOpenGLTexture::BindingTarget bindingTarget;
+    GLuint textureId;
+    QOpenGLTexture::TextureFormat format;
+    QOpenGLTexture::TextureFormatClass formatClass;
+    int dimensions[3];
+    int requestedMipLevels;
+    int mipLevels;
+    int layers;
+    int faces;
+
+    int samples;
+    bool fixedSamplePositions;
+
+    int baseLevel;
+    int maxLevel;
+
+    QOpenGLTexture::SwizzleValue swizzleMask[4];
+    QOpenGLTexture::DepthStencilMode depthStencilMode;
+
+    QOpenGLTexture::Filter minFilter;
+    QOpenGLTexture::Filter magFilter;
+    float maxAnisotropy;
+    QOpenGLTexture::WrapMode wrapModes[3];
+    QVariantList borderColor;
+    float minLevelOfDetail;
+    float maxLevelOfDetail;
+    float levelOfDetailBias;
+
+    bool textureView;
+    bool autoGenerateMipMaps;
+    bool storageAllocated;
+
+    QPair<int, int> glVersion;
+    QOpenGLTextureHelper *texFuncs;
+
+    QOpenGLTexture::Features features;
+};
+
+QT_END_NAMESPACE
+
+#undef Q_CALL_MEMBER_FUNCTION
+
+#endif // QT_NO_OPENGL
+
+#endif // QABSTRACTOPENGLTEXTURE_P_H