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project/fm_viewer/fav/opengl/SubImagesRenderer.h

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+/******************************************************************************
+    QtAV:  Multimedia framework based on Qt and FFmpeg
+    Copyright (C) 2012-2016 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_SUBIMAGESRENDERER_H
+#define QTAV_SUBIMAGESRENDERER_H
+
+#define REMOVE_SUBIMAGE_RENDERER 1
+#if !(REMOVE_SUBIMAGE_RENDERER)
+
+#include <QtGui/QMatrix4x4>
+#include <../SubImage.h>
+#include <../OpenGLTypes.h>
+#include "OpenGLHelper.h"
+#if QT_VERSION >= QT_VERSION_CHECK(5, 0, 0)
+#include <QtGui/QOpenGLShaderProgram>
+#include <QtGui/QOpenGLShader>
+#else
+#include <QtOpenGL/QGLShaderProgram>
+#include <QtOpenGL/QGLShader>
+#undef QOpenGLShaderProgram
+#undef QOpenGLShader
+#define QOpenGLShaderProgram QGLShaderProgram
+#define QOpenGLShader QGLShader
+#endif
+
+namespace FAV {
+class SubImagesGeometry;
+class GeometryRenderer;
+class SubImagesRenderer
+{
+public:
+    SubImagesRenderer();
+    ~SubImagesRenderer();
+    /*!
+     * \brief render
+     * \param ass
+     * \param target
+     * \param transform additional transform, e.g. aspect ratio
+     */
+    void render(const SubImageSet& ass, const QRect& target, const QMatrix4x4& transform = QMatrix4x4());
+    /*!
+     * \brief setProjectionMatrixToRect
+     * the rect will be viewport
+     */
+    void setProjectionMatrixToRect(const QRectF& v);
+
+private:
+    void uploadTexture(SubImagesGeometry* g);
+
+    SubImagesGeometry *m_geometry;
+    GeometryRenderer *m_renderer;
+    QMatrix4x4 m_mat;
+    QRect m_rect;
+
+    GLuint m_tex;
+    QOpenGLShaderProgram m_program;
+};
+} //namespace FAV
+#endif // QTAV_SUBIMAGESRENDERER_H
+#endif // #if !(REMOVE_SUBIMAGE_RENDERER)