GGLContext 에 대하여

아래는 recovery UI 에 사용되는 GGLContext 의 구조체이다.

204 typedef struct {
    // immediate rendering
    void (*pointx)(void *con, const GGLcoord* v, GGLcoord r);
    void (*linex)(void *con,
            const GGLcoord* v0, const GGLcoord* v1, GGLcoord width);
    void (*recti)(void* c, GGLint l, GGLint t, GGLint r, GGLint b);
    void (*trianglex)(void* c,
            GGLcoord const* v0, GGLcoord const* v1, GGLcoord const* v2);

    // scissor
    void (*scissor)(void* c, GGLint x, GGLint y, GGLsizei width, GGLsizei height);

    // Set the textures and color buffers
    void (*activeTexture)(void* c, GGLuint tmu);
    void (*bindTexture)(void* c, const GGLSurface* surface);
    void (*colorBuffer)(void* c, const GGLSurface* surface);
    void (*readBuffer)(void* c, const GGLSurface* surface);
    void (*depthBuffer)(void* c, const GGLSurface* surface);
    void (*bindTextureLod)(void* c, GGLuint tmu, const GGLSurface* surface);

    // enable/disable features
    void (*enable)(void* c, GGLenum name);
    void (*disable)(void* c, GGLenum name);
    void (*enableDisable)(void* c, GGLenum name, GGLboolean en);

    // specify the fragment's color
    void (*shadeModel)(void* c, GGLenum mode);
    void (*color4xv)(void* c, const GGLclampx* color);
    // specify color iterators (16.16)
    void (*colorGrad12xv)(void* c, const GGLcolor* grad);

    // specify Z coordinate iterators (0.32)
    void (*zGrad3xv)(void* c, const GGLfixed32* grad);

    // specify W coordinate iterators (16.16)
    void (*wGrad3xv)(void* c, const GGLfixed* grad);

    // specify fog iterator & color (16.16)
    void (*fogGrad3xv)(void* c, const GGLfixed* grad);
    void (*fogColor3xv)(void* c, const GGLclampx* color);

    // specify blending parameters
    void (*blendFunc)(void* c, GGLenum src, GGLenum dst);
    void (*blendFuncSeparate)(void* c,  GGLenum src, GGLenum dst,
                                        GGLenum srcAlpha, GGLenum dstAplha);

    // texture environnement (REPLACE / MODULATE / DECAL / BLEND)
    void (*texEnvi)(void* c,    GGLenum target,
                                GGLenum pname,
                                GGLint param);

    void (*texEnvxv)(void* c, GGLenum target,
            GGLenum pname, const GGLfixed* params);

    // texture parameters (Wrapping, filter)
    void (*texParameteri)(void* c,  GGLenum target,
                                    GGLenum pname,
                                    GGLint param);

    // texture iterators (16.16)
    void (*texCoord2i)(void* c, GGLint s, GGLint t);
    void (*texCoord2x)(void* c, GGLfixed s, GGLfixed t);

    // s, dsdx, dsdy, scale, t, dtdx, dtdy, tscale
    // This api uses block floating-point for S and T texture coordinates.
    // All values are given in 16.16, scaled by 'scale'. In other words,
    // set scale to 0, for 16.16 values.
    void (*texCoordGradScale8xv)(void* c, GGLint tmu, const int32_t* grad8);

    void (*texGeni)(void* c, GGLenum coord, GGLenum pname, GGLint param);

    // masking
    void (*colorMask)(void* c,  GGLboolean red,
                                GGLboolean green,
                                GGLboolean blue,
                                GGLboolean alpha);

    void (*depthMask)(void* c, GGLboolean flag);

    void (*stencilMask)(void* c, GGLuint mask);

    // alpha func
    void (*alphaFuncx)(void* c, GGLenum func, GGLclampx ref);

    // depth func
    void (*depthFunc)(void* c, GGLenum func);

    // logic op
    void (*logicOp)(void* c, GGLenum opcode);

    // clear
    void (*clear)(void* c, GGLbitfield mask);
    void (*clearColorx)(void* c,
            GGLclampx r, GGLclampx g, GGLclampx b, GGLclampx a);
    void (*clearDepthx)(void* c, GGLclampx depth);
    void (*clearStencil)(void* c, GGLint s);

    // framebuffer operations
    void (*copyPixels)(void* c, GGLint x, GGLint y,
            GGLsizei width, GGLsizei height, GGLenum type);
    void (*rasterPos2x)(void* c, GGLfixed x, GGLfixed y);
    void (*rasterPos2i)(void* c, GGLint x, GGLint y);
} GGLContext;