RendererModules/OpenGLES/Renderer.h

/***********************************************************************
    created:    Sun Jan 11 2009
    author:     Paul D Turner
*************************************************************************/
/***************************************************************************
 *   Copyright (C) 2004 - 2009 Paul D Turner & The CEGUI Development Team
 *
 *   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 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 _CEGUIOpenGLESRenderer_h_
#define _CEGUIOpenGLESRenderer_h_

#include "CEGUI/Base.h"
#include "CEGUI/Renderer.h"
#include "CEGUI/Size.h"
#include "CEGUI/Vector.h"
#include "CEGUI/RendererModules/OpenGLES/GLES.h"
#include <vector>
#include <map>

#if (defined( __WIN32__ ) || defined( _WIN32 )) && !defined(CEGUI_STATIC)
#   ifdef CEGUIOPENGLESRENDERER_EXPORTS
#       define OPENGLES_GUIRENDERER_API __declspec(dllexport)
#   else
#       define OPENGLES_GUIRENDERER_API __declspec(dllimport)
#   endif
#else
#   define OPENGLES_GUIRENDERER_API
#endif

#if defined(_MSC_VER)
#   pragma warning(push)
#   pragma warning(disable : 4251)
#endif


// Start of CEGUI namespace section
namespace CEGUI
{
class OpenGLESTexture;
class OpenGLESTextureTarget;
class OpenGLESGeometryBuffer;
class OGLTextureTargetFactory;

class OPENGLES_GUIRENDERER_API OpenGLESRenderer : public Renderer
{
public:
    enum TextureTargetType
    {
        TTT_AUTO,
        TTT_FBO,
        TTT_PBUFFER,
        TTT_NONE
    };

    static OpenGLESRenderer& bootstrapSystem(
                                const TextureTargetType tt_type = TTT_AUTO,
                                const int abi = CEGUI_VERSION_ABI);

    static OpenGLESRenderer& bootstrapSystem(
                                const Sizef& display_size,
                                const TextureTargetType tt_type = TTT_AUTO,
                                const int abi = CEGUI_VERSION_ABI);

    static void destroySystem();

    static OpenGLESRenderer& create(const TextureTargetType tt_type = TTT_AUTO,
                                    const int abi = CEGUI_VERSION_ABI);

    static OpenGLESRenderer& create(const Sizef& display_size,
                                    const TextureTargetType tt_type = TTT_AUTO,
                                    const int abi = CEGUI_VERSION_ABI);

    static void destroy(OpenGLESRenderer& renderer);

        static bool isGLExtensionSupported( const char* extension );

    // implement Renderer interface
    RenderTarget& getDefaultRenderTarget();
    GeometryBuffer& createGeometryBuffer();
    void destroyGeometryBuffer(const GeometryBuffer& buffer);
    void destroyAllGeometryBuffers();
    TextureTarget* createTextureTarget();
    void destroyTextureTarget(TextureTarget* target);
    void destroyAllTextureTargets();
    Texture& createTexture(const String& name);
    Texture& createTexture(const String& name,
                           const String& filename,
                           const String& resourceGroup);
    Texture& createTexture(const String& name, const Sizef& size);
    void destroyTexture(Texture& texture);
    void destroyTexture(const String& name);
    void destroyAllTextures();
    Texture& getTexture(const String& name) const;
    bool isTextureDefined(const String& name) const;
    void beginRendering();
    void endRendering();
    void setDisplaySize(const Sizef& sz);
    const Sizef& getDisplaySize() const;
    const Vector2f& getDisplayDPI() const;
    uint getMaxTextureSize() const;
    const String& getIdentifierString() const;

    Texture& createTexture(const String& name, GLuint tex, const Sizef& sz);

    void enableExtraStateSettings(bool setting);

    void grabTextures();

    void restoreTextures();

    Sizef getAdjustedTextureSize(const Sizef& sz) const;

    static float getNextPOTSize(const float f);
    
    bool isTexCoordSystemFlipped() const { return true; }

private:
    OpenGLESRenderer(const TextureTargetType tt_type);

    OpenGLESRenderer(const Sizef& display_size, const TextureTargetType tt_type);

    virtual ~OpenGLESRenderer();

    void setupExtraStates();

    void cleanupExtraStates();

    void initialiseTextureTargetFactory(const TextureTargetType tt_type);

    void logTextureDestruction(const String& name);

        struct RenderStates
        {
                GLboolean glScissorTest;
                GLboolean texturing;
                GLboolean blend;
                GLint arrayBuffer;
                GLint texture;
                GLint texEnvParam;
        } glPreRenderStates;

    static String d_rendererID;
    Sizef d_displaySize;
    Vector2f d_displayDPI;
    RenderTarget* d_defaultTarget;
    typedef std::vector<TextureTarget*> TextureTargetList;
    TextureTargetList d_textureTargets;
    typedef std::vector<OpenGLESGeometryBuffer*> GeometryBufferList;
    GeometryBufferList d_geometryBuffers;
    typedef std::map<String, OpenGLESTexture*, StringFastLessCompare
                     CEGUI_MAP_ALLOC(String, OpenGLESTexture*)> TextureMap;
    TextureMap d_textures;
    uint d_maxTextureSize;
    bool d_initExtraStates;
    OGLTextureTargetFactory* d_textureTargetFactory;
  };

} // End of  CEGUI namespace section

#if defined(_MSC_VER)
#   pragma warning(pop)
#endif

#endif // end of guard _CEGUIOpenGLESRenderer_h_