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2026-02-21 17:11:31 +09:00
commit 18b4338361
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--- a/project/fm_viewer/fav/GeometryRenderer.h
+++ b/project/fm_viewer/fav/GeometryRenderer.h
@@ -0,0 +1,96 @@
+/******************************************************************************
+    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_GEOMETRYRENDERER_H
+#define QTAV_GEOMETRYRENDERER_H
+
+#define REMOVE_GEOMETRY_RENDERER 0
+#if !(REMOVE_GEOMETRY_RENDERER)
+
+#include "Geometry.h"
+#define QT_VAO (QT_VERSION >= QT_VERSION_CHECK(5, 1, 0))
+//#define QT_VAO 0
+#if QT_VAO
+#include <QtGui/QOpenGLVertexArrayObject>
+#endif //QT_VAO
+# if QT_VERSION >= QT_VERSION_CHECK(5, 0, 0)
+#include <QtGui/QOpenGLBuffer>
+#else
+#include <QtOpenGL/QGLBuffer>
+typedef QGLBuffer QOpenGLBuffer;
+#endif
+QT_BEGIN_NAMESPACE
+class QOpenGLShaderProgram;
+QT_END_NAMESPACE
+
+#define DEBUG_QT_VAO 0
+
+namespace FAV {
+/*!
+ * \brief The GeometryRenderer class
+ * TODO: support multiple geometry with same primitive (glPrimitiveRestartIndex, glDrawArraysInstanced, glDrawArraysInstanced, glMultiDrawArrays...)
+ */
+class Q_AV_EXPORT GeometryRenderer
+{
+public:
+    // rendering features. Use all possible features as the default.
+    static const int kVBO = 0x01;
+    static const int kIBO = 0x02;
+    static const int kVAO = 0x04;
+    static const int kMapBuffer = 1<<16;
+    // TODO: VAB, VBUM etc.
+    GeometryRenderer();
+    virtual ~GeometryRenderer() {}
+    // call updateBuffer internally in bindBuffer if feature is changed
+    void setFeature(int f, bool on);
+    void setFeatures(int value);
+    int features() const;
+    int actualFeatures() const;
+    bool testFeatures(int value) const;
+    /*!
+     * \brief updateGeometry
+     * Update geometry buffer. Rebind VBO, IBO to VAO if geometry attributes is changed.
+     * Assume attributes are bound in the order 0, 1, 2,....
+     * Make sure the old geometry is not destroyed before this call because it will be used to compare with the new \l geo
+     * \param geo null: release vao/vbo
+     */
+    void updateGeometry(Geometry* geo = NULL);
+    virtual void render();
+protected:
+    void bindBuffers();
+    void unbindBuffers();
+private:
+    Geometry *g;
+    int features_;
+    int vbo_size, ibo_size; // QOpenGLBuffer.size() may get error 0x501 (vertex buffer)
+    QOpenGLBuffer vbo; //VertexBuffer
+#if QT_VAO
+    QOpenGLVertexArrayObject vao;
+#endif //QT_VAO
+    QOpenGLBuffer ibo;      // index buffer
+
+    // geometry characteristic
+    int stride;
+    QVector<Attribute> attrib;
+};
+
+} //namespace FAV
+#endif //QTAV_GEOMETRYRENDERER_H
+#endif // #if !(REMOVE_GEOMETRY_RENDERER)