windows-server-2003/multimedia/directx/dxg/d3d/dx6/rast/cspan/ctx1addr.mcp

//-----------------------------------------------------------------------------
//
// This file contains texture addressing functions.
//
// Copyright (C) Microsoft Corporation, 1997.
//
// WARNING WARNING WARNING
// This cpp file generated from mcp file.
// EDIT THE MCP FILE.
// I warned you.
// WARNING WARNING WARNING
//
//-----------------------------------------------------------------------------

include(`m4hdr.mh')dnl
#include "pch.cpp"
#pragma hdrstop
#include "ctx1a_mh.h"
#include "ctexfilt.h"

include(`ctexaddr.mh')dnl

d_RepStr(`d_RepStr(`d_RepStr(`d_RepStr(`d_TexAddr(0, AA, BB, CC, DD)',
         `AA', `TexAddrWrapMirror', `TexAddrAll')',
         `BB', `NoPersp', `Persp')',
         `CC', ifelse(DD, NoLOD, `Point, Bilinear', `Point, Bilinear, MaybeBilinear'))',
         `DD', `NoLOD', `LOD')

// All singing all dancing mip mapping address calculation and filtering.
void C_Tex1Addr_Filt_All_Mip(PD3DI_RASTCTX pCtx, PD3DI_RASTPRIM pP,
                       PD3DI_RASTSPAN pS)
{
    PD3DI_SPANTEX pTex = pCtx->pTexture[0];
    INT16 iLOD0 = (INT16)(min(max(pS->iLOD >> 11, 0), pTex->cLOD));
    // use same LOD for both levels, if magnifying
    // ATTENTION the best way to make the magnify go faster is probably to
    // have the bead chooser pick a specialized optimized magnify bead
    // (which we have anyway) and put it in a pfnTex1AddrMagnify bead pointer.
    // Then, we could call it at the top of MipMap based on the sign of the LOD.
    INT16 iLOD1 = (INT16)(min(iLOD0+(pS->iLOD > 0), pTex->cLOD));
    INT16 iShiftU0 = pTex->iShiftU - iLOD0;
    INT16 iShiftU1 = pTex->iShiftU - iLOD1;
    INT16 iShiftV0 = pTex->iShiftV - iLOD0;
    INT16 iShiftV1 = pTex->iShiftV - iLOD1;
    INT32 iU00, iV00, iU10, iV10;
    INT32 iUFrac0, iVFrac0, iUFrac1, iVFrac1;

    // select filter based on whether we are minifying or magnifying
    D3DTEXTUREMINFILTER uFilter;
    if (pS->iLOD < 0)
    {
        // depends on the first two entries (POINT and LINEAR)
        // being the same for min and mag
        uFilter = (D3DTEXTUREMINFILTER)pTex->uMagFilter;
    }
    else
    {
        uFilter = pTex->uMinFilter;
    }
    if (uFilter == D3DTFG_LINEAR)
    {
        INT32 iHalf = 1<<(TEX_FINAL_SHIFT - iShiftU0 - 1);
        INT32 iUAlign = pCtx->SI.iU1 - iHalf;
        iHalf = 1<<(TEX_FINAL_SHIFT - iShiftV0 - 1);
        INT32 iVAlign = pCtx->SI.iV1 - iHalf;
        iU00 = iUAlign >> (TEX_FINAL_SHIFT - iShiftU0);
        iV00 = iVAlign >> (TEX_FINAL_SHIFT - iShiftV0);
        iUFrac0 = (iUAlign<<iShiftU0) & TEX_FINAL_FRAC_MASK;
        iVFrac0 = (iVAlign<<iShiftV0) & TEX_FINAL_FRAC_MASK;

        iHalf = 1<<(TEX_FINAL_SHIFT - iShiftU1 - 1);
        iUAlign = pCtx->SI.iU1 - iHalf;
        iHalf = 1<<(TEX_FINAL_SHIFT - iShiftV1 - 1);
        iVAlign = pCtx->SI.iV1 - iHalf;
        iU10 = iUAlign >> (TEX_FINAL_SHIFT - iShiftU1);
        iV10 = iVAlign >> (TEX_FINAL_SHIFT - iShiftV1);
        iUFrac1 = (iUAlign<<iShiftU1) & TEX_FINAL_FRAC_MASK;
        iVFrac1 = (iVAlign<<iShiftV1) & TEX_FINAL_FRAC_MASK;
    }
    else
    {
        // point sampling mip maps
        iU00 = (pCtx->SI.iU1) >> (TEX_FINAL_SHIFT - iShiftU0);
        iV00 = (pCtx->SI.iV1) >> (TEX_FINAL_SHIFT - iShiftV0);
        iU10 = (pCtx->SI.iU1) >> (TEX_FINAL_SHIFT - iShiftU1);
        iV10 = (pCtx->SI.iV1) >> (TEX_FINAL_SHIFT - iShiftV1);
    }

    // these need to be computed before texture address wrapping, if bilinear is used
    INT32 iU01 = iU00 + 1;
    INT32 iV01 = iV00 + 1;
    INT32 iU11 = iU10 + 1;
    INT32 iV11 = iV10 + 1;

    UINT16 uMaskU0 = pTex->uMaskU >> iLOD0;
    UINT16 uMaskV0 = pTex->uMaskV >> iLOD0;
    UINT16 uMaskU1 = pTex->uMaskU >> iLOD1;
    UINT16 uMaskV1 = pTex->uMaskV >> iLOD1;

    INT16 iFlip, iClamp1, iClamp2, iClampMinT, iClampMaxT;
    INT16 iOoWAdj = (INT16)(pS->iOoW>>23);                  // 1.31 >> 23 = 1.8
    INT16 iUoWAdj = (INT16)(pS->iUoW1 >> (TEX_SHIFT - 8));  // adjust to match iOoWAdj
    INT16 iVoWAdj = (INT16)(pS->iVoW1 >> (TEX_SHIFT - 8));
d_TexAddrAll(U, iU00, uMaskU0, iUoWAdj, iOoWAdj, iLOD0)
d_TexAddrAll(V, iV00, uMaskV0, iVoWAdj, iOoWAdj, iLOD0)
d_TexAddrAll(U, iU10, uMaskU1, iUoWAdj, iOoWAdj, iLOD1)
d_TexAddrAll(V, iV10, uMaskV1, iVoWAdj, iOoWAdj, iLOD1)

    UINT32 uTex0, uTex1;    // to put results of bilinear or point filters
    if (uFilter == D3DTFG_LINEAR)
    {
        // bilinear on mip levels
        // previously computed iOoWAdj, iUoWAdj, iVoWAdj are still valid
d_TexAddrAll(U, iU01, uMaskU0, iUoWAdj, iOoWAdj, iLOD0)
d_TexAddrAll(V, iV01, uMaskV0, iVoWAdj, iOoWAdj, iLOD0)
d_TexAddrAll(U, iU11, uMaskU1, iUoWAdj, iOoWAdj, iLOD1)
d_TexAddrAll(V, iV11, uMaskV1, iVoWAdj, iOoWAdj, iLOD1)
        UINT32 uTex00 = pCtx->pfnTexRead[0](iU00, iV00, pTex->iShiftPitch[iLOD0],
            pTex->pBits[iLOD0], pTex);
        UINT32 uTex10 = pCtx->pfnTexRead[0](iU01, iV00, pTex->iShiftPitch[iLOD0],
            pTex->pBits[iLOD0], pTex);
        UINT32 uTex01 = pCtx->pfnTexRead[0](iU00, iV01, pTex->iShiftPitch[iLOD0],
            pTex->pBits[iLOD0], pTex);
        UINT32 uTex11 = pCtx->pfnTexRead[0](iU01, iV01, pTex->iShiftPitch[iLOD0],
            pTex->pBits[iLOD0], pTex);
        TexFiltBilinear((D3DCOLOR*)&uTex0, iUFrac0, iVFrac0, uTex00, uTex10, uTex01, uTex11);
        uTex00 = pCtx->pfnTexRead[0](iU10, iV10, pTex->iShiftPitch[iLOD1],
            pTex->pBits[iLOD1], pTex);
        uTex10 = pCtx->pfnTexRead[0](iU11, iV10, pTex->iShiftPitch[iLOD1],
            pTex->pBits[iLOD1], pTex);
        uTex01 = pCtx->pfnTexRead[0](iU10, iV11, pTex->iShiftPitch[iLOD1],
            pTex->pBits[iLOD1], pTex);
        uTex11 = pCtx->pfnTexRead[0](iU11, iV11, pTex->iShiftPitch[iLOD1],
            pTex->pBits[iLOD1], pTex);
        TexFiltBilinear((D3DCOLOR*)&uTex1, iUFrac1, iVFrac1, uTex00, uTex10, uTex01, uTex11);
    }
    else
    {
        // point sample on mip levels
        uTex0 = pCtx->pfnTexRead[0](iU00, iV00, pTex->iShiftPitch[iLOD0],
            pTex->pBits[iLOD0], pTex);
        uTex1 = pCtx->pfnTexRead[0](iU10, iV10, pTex->iShiftPitch[iLOD1],
            pTex->pBits[iLOD1], pTex);
    }
    INT32 r0, r1;
    INT32 g0, g1;
    INT32 b0, b1;
    INT32 a0, a1;

    r0 = RGBA_GETRED(uTex0);
    r1 = RGBA_GETRED(uTex1);

    g0 = RGBA_GETGREEN(uTex0);
    g1 = RGBA_GETGREEN(uTex1);

    b0 = RGBA_GETBLUE(uTex0);
    b1 = RGBA_GETBLUE(uTex1);

    a0 = RGBA_GETALPHA(uTex0);
    a1 = RGBA_GETALPHA(uTex1);

    INT32 t = pS->iLOD & 0x7ff;
    INT32 mt = 0x7ff - t;
    r0 = (mt*r0 + t*r1)>>11;
    g0 = (mt*g0 + t*g1)>>11;
    b0 = (mt*b0 + t*b1)>>11;
    a0 = (mt*a0 + t*a1)>>11;
    // HACK to see LOD
    // scale it so 0 is mid range red
//    r0 = (((pS->iLOD & 0xf800) >> 8) + 0x80 ) & 0xff;        // map in red
//    g0 = (pS->iLOD >> 3) & 0xff;        // between maps in green (doesn't show lowest 3 bits)
//    b0 = 0;
    pCtx->SI.TexCol[0] = RGBA_MAKE(r0, g0, b0, a0);

    pS->iUoW1 += pP->iDUoW1DX;
    pS->iVoW1 += pP->iDVoW1DX;
    pS->iLOD += pS->iDLOD;
    pCtx->SI.iOoW = pS->iOoW;       // save the old OoW for next stage, if needed
    pS->iOoW += pP->iDOoWDX;

d_WDivide()
    pCtx->SI.iU1 = d_WTimesUVoW(pS->iW,pS->iUoW1);
    pCtx->SI.iV1 = d_WTimesUVoW(pS->iW,pS->iVoW1);

    pCtx->pfnTex1AddrEnd(pCtx, pP, pS);
}