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project/fm_viewer/fav/opengl/SubImagesGeometry.h

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+/******************************************************************************
+    QtAV:  Multimedia framework based on Qt and FFmpeg
+    Copyright (C) 2012-2017 Wang Bin <wbsecg1@gmail.com>
+
+*   This file is part of QtAV (from 2016)
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+******************************************************************************/
+#ifndef QTAV_SUBIMAGESGEOMETRY_H
+#define QTAV_SUBIMAGESGEOMETRY_H
+#include "../Geometry.h"
+#include "../SubImage.h"
+
+#if !(DO_NOT_USE_SUBTITLE)
+
+namespace FAV {
+class SubImagesGeometry : public Geometry {
+public:
+    SubImagesGeometry();
+    bool setSubImages(const SubImageSet& images);
+    /*!
+     * \brief generateVertexData
+     * \param rect rect render to. If it's viewport rect, and fit video aspect ratio, ass images created from video frame size needs a scale transform is required when rendering
+     * \param useIndecies
+     * \param maxWidth
+     * \return false if current SubImageSet is invalid
+     */
+    bool generateVertexData(const QRect& rect, bool useIndecies = false, int maxWidth = -1);
+    // available after generateVertexData is called
+    int width() { return m_w;}
+    int height() { return m_h;}
+    int stride() const Q_DECL_OVERRIDE;
+    const QVector<Attribute>& attributes() const Q_DECL_OVERRIDE { return m_attributes;}
+    const SubImageSet& images() const { return m_images; }
+    const QVector<QRect>& uploadRects() const { return m_rects_upload;}
+private:
+    using Geometry::allocate;
+    bool m_normalized;
+    int m_w, m_h;
+    QVector<Attribute> m_attributes;
+    SubImageSet m_images; // for texture upload parameters
+    QVector<QRect> m_rects_upload;
+};
+} //namespace FAV
+#endif //QTAV_SUBIMAGESGEOMETRY_H
+#endif // #if !(DO_NOT_USE_SUBTITLE)