DrawContext.h

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#ifndef DRAWCONTEXT_H
#define DRAWCONTEXT_H
#ifdef __cplusplus
extern "C" {
#endif
 
#include "Atlas.h"
#include "HandleDefs.h"
 
struct TileMap;
 
struct Vert2DTexture
{
    float x, y;
    float u, v;
};
 
struct Vert2DTextureQuad
{
    struct Vert2DTexture v[4];
};
 
typedef struct Vert2DTexture Worldspace2DVert;
typedef struct Vert2DTextureQuad Worldspace2DQuad;
 
struct Vert2DColourTexture
{
    float x, y;
    float u, v;
    float r, g, b, a;
};
 
struct Vert2DColourTextureQuad
{
    struct Vert2DColourTexture v[4];
};
 
typedef struct Vert2DColourTexture WidgetVertex;
typedef struct Vert2DColourTextureQuad WidgetQuad;
 
typedef void(*SetCurrentAtlasFn)(hTexture atlas);
typedef HUIVertexBuffer(*NewUIVertexBufferFn)(int size);
typedef void(*UIVertexBufferDataFn)(HUIVertexBuffer hBuf, WidgetVertex* src, size_t size);
typedef void(*DrawUIVertexBufferFn)(HUIVertexBuffer hBuf, size_t vertexCount);
typedef void(*DestroyUIVertexBufferFn)(HUIVertexBuffer hBuf);
typedef hTexture(*UploadTextureFn)(void* src, int channels, int pxWidth, int pxHeight);
typedef void(*DestroyTextureFn)(hTexture tex);
 
 
typedef H2DWorldspaceVertexBuffer(*NewWorldspaceVertBufferFn)(int size);
 
typedef u32 VertIndexT;
typedef void(*WorldspaceVertexBufferDataFn)(H2DWorldspaceVertexBuffer hBuf, Worldspace2DVert* src, size_t size, VertIndexT* indices, u32 numIndices);
typedef void(*DrawWorldspaceVertexBufferFn)(H2DWorldspaceVertexBuffer hBuf, size_t vertexCount, mat4 view);
typedef void(*DestroyWorldspaceVertexBufferFn)(H2DWorldspaceVertexBuffer hBuf);
 
 
typedef struct DrawContext
{
    int screenWidth;
    int screenHeight;
    NewUIVertexBufferFn NewUIVertexBuffer;
    UIVertexBufferDataFn UIVertexBufferData;
    DrawUIVertexBufferFn DrawUIVertexBuffer;
    DestroyUIVertexBufferFn DestroyVertexBuffer;
    SetCurrentAtlasFn SetCurrentAtlas;
    UploadTextureFn UploadTexture;
    DestroyTextureFn DestroyTexture;
 
    NewWorldspaceVertBufferFn NewWorldspaceVertBuffer;
    WorldspaceVertexBufferDataFn WorldspaceVertexBufferData;
    DrawWorldspaceVertexBufferFn DrawWorldspaceVertexBuffer;
    DestroyWorldspaceVertexBufferFn DestroyWorldspaceVertexBuffer;
}DrawContext;
 
DrawContext Dr_InitDrawContext();
void Dr_OnScreenDimsChange(DrawContext* pCtx, int newW, int newH);
 
#ifdef __cplusplus
}
#endif
 
 
#endif