/*
 * Copyright (c) 2026 ThorVG project. All rights reserved.

 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:

 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#ifndef _TVG_GL_TEXTURE_MGR_H_
#define _TVG_GL_TEXTURE_MGR_H_

#include "tvgGlCommon.h"
#include "tvgInlist.h"

struct TextureMgr
{
    GLuint retain(const RenderSurface* surface, FilterMethod filter);
    GLuint release(const RenderSurface* surface, FilterMethod filter, GLuint texId);
    void clear();

    struct Entry
    {
        GLuint texId = 0;
        uint32_t refCnt = 0;
    };

    struct SurfaceEntry
    {
        INLIST_ITEM(SurfaceEntry);
        const RenderSurface* surface = nullptr;
        Entry bilinear;
        Entry nearest;
    };

    SurfaceEntry* find(const RenderSurface* surface);
    static void upload(GLuint texId, const RenderSurface* surface, FilterMethod filter);

    tvg::Inlist<SurfaceEntry> surfaces;  // Cached textures keyed by RenderSurface.
    uint16_t stamp = 1;                  // Non-zero rolling stamp for stale texture ownership checks.
};

#endif /* _TVG_GL_TEXTURE_MGR_H_ */
