texture_buffer.h

/*****************************************************************************
 * VCLib                                                                     *
 * Visual Computing Library                                                  *
 *                                                                           *
 * Copyright(C) 2021-2025                                                    *
 * Visual Computing Lab                                                      *
 * ISTI - Italian National Research Council                                  *
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 * All rights reserved.                                                      *
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 * This program is free software; you can redistribute it and/or modify      *
 * it under the terms of the Mozilla Public License Version 2.0 as published *
 * by the Mozilla Foundation; either version 2 of the License, or            *
 * (at your option) any later version.                                       *
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 * This program 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              *
 * Mozilla Public License Version 2.0                                        *
 * (https://www.mozilla.org/en-US/MPL/2.0/) for more details.                *
 ****************************************************************************/
 
#ifndef VCL_BGFX_BUFFERS_TEXTURE_BUFFER_H
#define VCL_BGFX_BUFFERS_TEXTURE_BUFFER_H
 
#include "generic_buffer.h"
 
namespace vcl {
 
class TextureBuffer : public GenericBuffer<bgfx::TextureHandle>
{
    using Base = GenericBuffer<bgfx::TextureHandle>;
 
    bgfx::TextureFormat::Enum mFormat = bgfx::TextureFormat::Count;
 
public:
    TextureBuffer() = default;
 
    void swap(TextureBuffer& other)
    {
        using std::swap;
        Base::swap(other);
        swap(mFormat, other.mFormat);
    }
 
    friend void swap(TextureBuffer& a, TextureBuffer& b) { a.swap(b); }
 
    void create(
        ushort                    width,
        ushort                    height,
        bgfx::TextureFormat::Enum format,
        uint64_t                  flags   = BGFX_TEXTURE_NONE,
        bool                      hasMips = false,
        uint                      nLayers = 1,
        const bgfx::Memory*       data    = nullptr)
    {
        destroy();
 
        mFormat = format;
 
        if (width != 0 && height != 0)
            mHandle = bgfx::createTexture2D(
                width, height, hasMips, nLayers, format, flags, data);
    }
 
    void bind(
        uint               stage,
        bgfx::Access::Enum access   = bgfx::Access::Read,
        uint8_t            mipLevel = 0) const
    {
        if (bgfx::isValid(mHandle)) {
            bgfx::setImage(stage, mHandle, mipLevel, access, mFormat);
        }
    }
};
 
} // namespace vcl
 
#endif // VCL_BGFX_BUFFERS_TEXTURE_BUFFER_H