VertexBufferGL.h

Go to the documentation of this file.

// Copyright © 2008-2021 Pioneer Developers. See AUTHORS.txt for details
// Licensed under the terms of the GPL v3. See licenses/GPL-3.txt
 
#ifndef OGL_VERTEXBUFFER_H
#define OGL_VERTEXBUFFER_H
#include "OpenGLLibs.h"
#include "graphics/VertexBuffer.h"
 
namespace Graphics {
    namespace OGL {
 
        class GLBufferBase {
        public:
            GLBufferBase() :
                m_written(false) {}
            GLuint GetBuffer() const { return m_buffer; }
 
        protected:
            GLuint m_buffer;
            bool m_written; // to check for invalid data rendering
        };
 
        class VertexBuffer : public Graphics::VertexBuffer, public GLBufferBase {
        public:
            VertexBuffer(const VertexBufferDesc &);
            ~VertexBuffer();
 
            virtual void Unmap() override final;
 
            // copies the contents of the VertexArray into the buffer
            virtual bool Populate(const VertexArray &) override final;
 
            // change the buffer data without mapping
            virtual void BufferData(const size_t, void *) override final;
 
            virtual void Bind() override final;
            virtual void Release() override final;
 
        protected:
            virtual Uint8 *MapInternal(BufferMapMode) override final;
 
        private:
            GLuint m_vao;
            Uint8 *m_data;
        };
 
        class IndexBuffer : public Graphics::IndexBuffer, public GLBufferBase {
        public:
            IndexBuffer(Uint32 size, BufferUsage);
            ~IndexBuffer();
 
            virtual Uint32 *Map(BufferMapMode) override final;
            virtual void Unmap() override final;
 
            // change the buffer data without mapping
            virtual void BufferData(const size_t, void *) override final;
 
            virtual void Bind() override final;
            virtual void Release() override final;
 
        private:
            Uint32 *m_data;
        };
 
        // Instance buffer
        class InstanceBuffer final : public Graphics::InstanceBuffer, public GLBufferBase {
        public:
            InstanceBuffer(Uint32 size, BufferUsage);
            virtual ~InstanceBuffer() override final;
            virtual matrix4x4f *Map(BufferMapMode) override final;
            virtual void Unmap() override final;
 
            virtual void Bind() override final;
            virtual void Release() override final;
 
        protected:
            enum InstOffs {
                INSTOFFS_MAT0 = 6, // these value must match those of a_transform within data/shaders/opengl/attributes.glsl
                INSTOFFS_MAT1 = 7,
                INSTOFFS_MAT2 = 8,
                INSTOFFS_MAT3 = 9
            };
            std::unique_ptr<matrix4x4f[]> m_data;
        };
 
    } // namespace OGL
} // namespace Graphics
 
#endif // OGL_VERTEXBUFFER_H