RE_RenderContext.h

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/*
 * PROPRIETARY INFORMATION.  This software is proprietary to
 * Side Effects Software Inc., and is not to be reproduced,
 * transmitted, or disclosed in any way without written permission.
 *
 * NAME:        RE_RenderContext.h ( RV Library, C++)
 *
 * COMMENTS:
 *      Temporary container for either a RV_Render or an RE_Render (not both)
 */
#ifndef RE_RenderContext_h
#define RE_RenderContext_h

class GR_Uniforms;
class RE_Render;
class RV_Render;
class RE_RenderContext;

struct mt_renders;
#include <UT/UT_Assert.h>

/// Temporary container for either a RV_Render and an RE_Render
class RE_RenderContext
{
public:
    // GL only - No Vulkan
    RE_RenderContext(RE_Render *r)
        : myGLRender(r),
          myVkRender(nullptr),
          myUniforms(nullptr)
        { }
    // Both; eventually GL will be phased out and it'll only be vulkan.
    RE_RenderContext(RE_Render *gl, RV_Render *vk, GR_Uniforms* u)
        : myGLRender(gl),
          myVkRender(vk),
          myUniforms(u)
        { }

    void operator=(RE_Render *r) { myGLRender = r; myVkRender=nullptr; }
    void operator=(RV_Render *r) { myVkRender = r; myGLRender=nullptr; }

    operator RE_Render *() { UT_ASSERT(myGLRender); return myGLRender; }
    operator RV_Render *() { UT_ASSERT(myVkRender); return myVkRender; }
    
    RE_Render * operator*() { return myGLRender; }
    RE_Render * operator->() { UT_ASSERT(myGLRender); return myGLRender; }

    RV_Render *vkRender() { return myVkRender; }
    GR_Uniforms *uniforms() { return myUniforms; }

    operator const RV_Render *() const
                           {  UT_ASSERT(myVkRender); return myVkRender; }
    operator const RE_Render *() const
                           { UT_ASSERT(myGLRender); return myGLRender; }

    const RE_Render * operator*() const { return myGLRender; }
    const RE_Render * operator->() const
                            { UT_ASSERT(myGLRender); return myGLRender; }

    const RV_Render *vkRender() const { return myVkRender; }
    const GR_Uniforms *uniforms() const { return myUniforms; }

    bool isGL() const { return myGLRender!=nullptr; }
    bool isVulkan() const { return myVkRender!=nullptr; }
private:
    RE_Render *myGLRender;
    RV_Render *myVkRender;
    GR_Uniforms *myUniforms;
};
#endif