GUIRenderer.h

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/* Copyright (C) 2015 Wildfire Games.
 * This file is part of 0 A.D.
 *
 * 0 A.D. is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * 0 A.D. 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with 0 A.D.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef INCLUDED_GUIRENDERER
#define INCLUDED_GUIRENDERER

#include "graphics/ShaderTechnique.h"
#include "graphics/Texture.h"
#include "lib/res/handle.h"
#include "ps/CStr.h"
#include "ps/Shapes.h"

#include <vector>

struct SGUIImageEffects;
struct SGUIImage;

namespace GUIRenderer
{
    class IGLState
    {
    public:
        virtual ~IGLState() {};
        virtual void Set(const CTexturePtr& tex) = 0;
        virtual void Unset() = 0;
    };

    struct SDrawCall
    {
        SDrawCall(const SGUIImage* image) : m_Image(image) {}
        CRect ComputeTexCoords() const;

        const SGUIImage* m_Image;

        bool m_HasTexture;
        CTexturePtr m_Texture;

        CRect m_ObjectSize;
        int m_CellID;

        bool m_EnableBlending;

        CShaderTechniquePtr m_Shader;
        CColor m_ShaderColorParameter;

        CRect m_Vertices;
        float m_DeltaZ;

        CColor m_BorderColor; // == CColor() for no border
        CColor m_BackColor;
    };

    class DrawCalls : public std::vector<SDrawCall>
    {
    public:
        DrawCalls();
        // Copy/assignment results in an empty list, not an actual copy
        DrawCalls(const DrawCalls&);
        DrawCalls& operator=(const DrawCalls&);
    };
}

#include "gui/CGUISprite.h"

namespace GUIRenderer
{
    void UpdateDrawCallCache(DrawCalls& Calls, const CStr& SpriteName, const CRect& Size, int CellID, std::map<CStr, CGUISprite*>& Sprites);

    void Draw(DrawCalls& Calls, float Z);
}

#endif // INCLUDED_GUIRENDERER