windows-server-2003/multimedia/directx/dxg/d3d/dx6/rast/rampspan/rrampcpy.mcp

//-----------------------------------------------------------------------------
//
// This file contains the general texture copy ramp span routine.
//
// Copyright (C) Microsoft Corporation, 1997.
//
//-----------------------------------------------------------------------------

include(`ramppix.mh')dnl
#include "pch.cpp"
#pragma hdrstop

dnl
dnl d_Ramp_Mono_CopyFunc
dnl
define(`d_Ramp_Mono_CopyFunc', `
void Ramp_Mono_Copy_$1(PD3DI_RASTCTX pCtx, PD3DI_RASTPRIM pP, PD3DI_RASTSPAN pS)
{
    INT32 iMapIdx = 0;
    BOOL bColorKey = FALSE;
    INT32 iIdx = pS->iIdx;
    UINT32 uZ = pS->uZ;
    PUINT8 pZ = pS->pZ;
    INT32 iDZDX = pP->iDZDX;
    d_RpZInit16

    if (pCtx->pdwRenderState[D3DRENDERSTATE_ZENABLE])
    {
        d_RpZTest16Any(`NoPixel')
    }

    // ATTENTION, carefully consolidate this at some point, making sure
    // to update the global color key flag when the render state or the texture
    // changes.

    if (pCtx->cActTex != 0)
    {
        PD3DI_SPANTEX pTex = pCtx->pTexture[0];

        // bColorKey iff there is a texture and it has transparent color AND
        // colorkey is enabled.
        bColorKey = (pCtx->pdwRenderState[D3DRENDERSTATE_COLORKEYENABLE] ||
                     pCtx->pdwRenderState[D3DRENDERSTATE_ALPHABLENDENABLE]) &&
                    (pTex->uFlags & D3DI_SPANTEX_HAS_TRANSPARENT);

        d_RpTexelAddrLOD

        iMapIdx = pCtx->pfnTexRead[0](iU00, iV00, pTex->iShiftPitch[iLOD0],
            pTex->pBits[iLOD0], pTex);
    }

    if(pCtx->pdwRenderState[D3DRENDERSTATE_ALPHABLENDENABLE] || bColorKey)
    {
        d_RpAlphaTest(`Gen', `NoPixel')
    }

    if (pCtx->pdwRenderState[D3DRENDERSTATE_ZENABLE])
    {
        d_RpZWrite16(`Gen')
    }

    iMapIdx &= 0xffffff;    // mask off texture alpha

    // The only way copy can work is 8 to 8 or 16 to 16
    ifelse(`$1', `8', `
    *(PUINT8)pS->pSurface = (UINT8)iMapIdx;', `
    *(PUINT16)pS->pSurface = (UINT16)iMapIdx;')

NoPixel:
    if (pCtx->pdwRenderState[D3DRENDERSTATE_ZENABLE])
    {
        pS->uZ = uZ;
    }
    if (pCtx->pdwRenderState[D3DRENDERSTATE_SHADEMODE] != D3DSHADE_FLAT)
    {
        // iIdx apparently not needed
        pS->iIdxA += pP->iDIdxADX;
    }
    if (pCtx->cActTex != 0)
    {
        if (pCtx->pdwRenderState[D3DRENDERSTATE_TEXTUREPERSPECTIVE])
        {
            d_RpSpecialWPerspStepTexLOD
        }
        else
        {
            d_RpAffineStepTexLOD
        }
    }
}
')dnl
d_Ramp_Mono_CopyFunc(8)
d_Ramp_Mono_CopyFunc(16)