/*
 * Copyright 2011 Joakim Sindholt <opensource@zhasha.com>
 *
 * 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
 * on the rights to use, copy, modify, merge, publish, distribute, sub
 * license, 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 (including the next
 * paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHOR(S) AND/OR THEIR SUPPLIERS 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 _NINE_PIXELSHADER9_H_
#define _NINE_PIXELSHADER9_H_

#include "iunknown.h"
#include "nine_shader.h"
#include "nine_state.h"
#include "basetexture9.h"
#include "nine_ff.h"
#include "surface9.h"

struct nine_lconstf;

struct NinePixelShader9
{
    struct NineUnknown base;
    struct nine_shader_variant variant;

    struct {
        const DWORD *tokens;
        DWORD size;
        uint8_t version; /* (major << 4) | minor */
    } byte_code;

    unsigned const_used_size; /* in bytes */

    uint8_t bumpenvmat_needed;
    uint16_t sampler_mask;
    uint8_t rt_mask;

    uint64_t ff_key[6];
    void *ff_cso;

    uint64_t last_key;
    void *last_cso;

    uint64_t next_key;
};
static inline struct NinePixelShader9 *
NinePixelShader9( void *data )
{
    return (struct NinePixelShader9 *)data;
}

static inline BOOL
NinePixelShader9_UpdateKey( struct NinePixelShader9 *ps,
                            struct nine_state *state,
                            struct nine_context *context )
{
    uint16_t samplers_shadow;
    uint32_t samplers_ps1_types;
    uint16_t projected;
    uint64_t key;
    BOOL res;

    if (unlikely(ps->byte_code.version < 0x20)) {
        /* no depth textures, but variable targets */
        uint32_t m = ps->sampler_mask;
        samplers_ps1_types = 0;
        while (m) {
            int s = ffs(m) - 1;
            m &= ~(1 << s);
            samplers_ps1_types |= (state->texture[s] ? state->texture[s]->pstype : 1) << (s * 2);
        }
        key = samplers_ps1_types;
    } else {
        samplers_shadow = (uint16_t)((state->samplers_shadow & NINE_PS_SAMPLERS_MASK) >> NINE_SAMPLER_PS(0));
        key = samplers_shadow & ps->sampler_mask;
    }

    if (ps->byte_code.version < 0x30) {
        key |= ((uint64_t)context->rs[D3DRS_FOGENABLE]) << 32;
        key |= ((uint64_t)context->rs[D3DRS_FOGTABLEMODE]) << 33;
    }

    /* centroid interpolation automatically used for color ps inputs */
    if (state->rt[0]->base.info.nr_samples)
        key |= ((uint64_t)1) << 34;

    if (unlikely(ps->byte_code.version < 0x14)) {
        projected = nine_ff_get_projected_key(state);
        key |= ((uint64_t) projected) << 48;
    }

    res = ps->last_key != key;
    if (res)
        ps->next_key = key;
    return res;
}

void *
NinePixelShader9_GetVariant( struct NinePixelShader9 *ps );

/*** public ***/

HRESULT
NinePixelShader9_new( struct NineDevice9 *pDevice,
                      struct NinePixelShader9 **ppOut,
                      const DWORD *pFunction, void *cso );

HRESULT
NinePixelShader9_ctor( struct NinePixelShader9 *,
                       struct NineUnknownParams *pParams,
                       const DWORD *pFunction, void *cso );

void
NinePixelShader9_dtor( struct NinePixelShader9 * );

HRESULT NINE_WINAPI
NinePixelShader9_GetFunction( struct NinePixelShader9 *This,
                              void *pData,
                              UINT *pSizeOfData );

#endif /* _NINE_PIXELSHADER9_H_ */