/*
 * Copyright 2011 Joakim Sindholt <opensource@zhasha.com>
 * SPDX-License-Identifier: MIT
 */

#ifndef _NINE_VERTEXDECLARATION9_H_
#define _NINE_VERTEXDECLARATION9_H_

#include "nine_defines.h"
#include "iunknown.h"

struct pipe_resource;
struct pipe_vertex_element;
struct pipe_stream_output_info;
struct NineDevice9;
struct NineVertexBuffer9;
struct nine_vs_output_info;

struct NineVertexDeclaration9
{
    struct NineUnknown base;

    /* G3D state */
    struct pipe_vertex_element *elems;
    unsigned nelems;

    /* index -> DECLUSAGE, for selecting the vertex element
     * for each VS input */
    uint16_t *usage_map;

    D3DVERTEXELEMENT9 *decls;
    DWORD fvf;

    BOOL position_t;
};
static inline struct NineVertexDeclaration9 *
NineVertexDeclaration9( void *data )
{
    return (struct NineVertexDeclaration9 *)data;
}

HRESULT
NineVertexDeclaration9_new( struct NineDevice9 *pDevice,
                            const D3DVERTEXELEMENT9 *pElements,
                            struct NineVertexDeclaration9 **ppOut );

HRESULT
NineVertexDeclaration9_new_from_fvf( struct NineDevice9 *pDevice,
                                     DWORD FVF,
                                     struct NineVertexDeclaration9 **ppOut );

HRESULT
NineVertexDeclaration9_ctor( struct NineVertexDeclaration9 *This,
                             struct NineUnknownParams *pParams,
                             const D3DVERTEXELEMENT9 *pElements );

void
NineVertexDeclaration9_dtor( struct NineVertexDeclaration9 *This );

HRESULT NINE_WINAPI
NineVertexDeclaration9_GetDeclaration( struct NineVertexDeclaration9 *This,
                                       D3DVERTEXELEMENT9 *pElement,
                                       UINT *pNumElements );

void
NineVertexDeclaration9_FillStreamOutputInfo(
    struct NineVertexDeclaration9 *This,
    struct nine_vs_output_info *ShaderOutputsInfo,
    unsigned numOutputs,
    struct pipe_stream_output_info *so );

/* Convert stream output data to the vertex declaration's format. */
HRESULT
NineVertexDeclaration9_ConvertStreamOutput(
    struct NineVertexDeclaration9 *This,
    struct NineVertexBuffer9 *pDstBuf,
    UINT DestIndex,
    UINT VertexCount,
    void *pSrcBuf,
    const struct pipe_stream_output_info *so );

#endif /* _NINE_VERTEXDECLARATION9_H_ */