GameFramework.h

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#ifndef GAMEFRAMEWORK_H
#define GAMEFRAMEWORK_H
 
#ifdef __cplusplus
extern "C"{
#endif 
 
#include "InputContext.h"
#include "DrawContext.h"
 
struct GameFrameworkLayer;
 
typedef void (*UpdateFn)(struct GameFrameworkLayer* pLayer, float deltaT);
typedef void (*DrawFn)(struct GameFrameworkLayer* pLayer, DrawContext* context);
typedef void (*InputFn)(struct GameFrameworkLayer* pLayer, InputContext* context);
typedef void (*OnPushFn)(struct GameFrameworkLayer* pLayer, DrawContext* drawContext, InputContext* inputContext);
typedef void (*OnPopFn)(struct GameFrameworkLayer* pLayer, DrawContext* drawContext, InputContext* inputContext);
typedef void (*OnWindowDimsChangedFn)(struct GameFrameworkLayer* pLayer, int newW, int newH);
 
typedef enum
{
    EnableUpdateFn = 1,
    EnableDrawFn = 2,
    EnableInputFn = 8,
    EnableOnPush = 16,
    EnableOnPop = 32,
    MasksDraw = 64,
    MasksUpdate = 128,
    MasksInput = 256
}GameFrameworkLayerFlags;
 
#define GF_ANYMASKMASK (MasksInput | MasksUpdate | MasksDraw)
 
enum GameFrameworkLayerType
{
    GFT_Unknown,
    GFT_UI,
    GFT_Game2D,
};
 
struct GameFrameworkLayer
{
    UpdateFn update;
    DrawFn draw;
    InputFn input;
    OnPushFn onPush;
    OnPopFn onPop;
    OnWindowDimsChangedFn onWindowDimsChanged;
    unsigned int flags;
    void* userData; 
    enum GameFrameworkLayerType type;
};
 
 
void GF_InitGameFramework();
void GF_DestroyGameFramework();
 
void GF_PushGameFrameworkLayer(const struct GameFrameworkLayer* layer);
void GF_PopGameFrameworkLayer();
 
void GF_EndFrame(DrawContext* drawContext, InputContext* inputContext);
 
void GF_UpdateGameFramework(float deltaT);
void GF_InputGameFramework(InputContext* context);
void GF_DrawGameFramework(DrawContext* context);
void GF_OnWindowDimsChanged(int newW, int newH);
 
struct GameFrameworkLayer* GF_GetLayerBelow(struct GameFrameworkLayer* pLayer);
 
#ifdef __cplusplus
}
#endif
 
#endif