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/******************************Module*Header**********************************\
** ******************** * D3D SAMPLE CODE ** ********************* Module Name: d3dtri.c** Content: Direct3D hw triangle rasterization code.** Copyright (c) 1994-1998 3Dlabs Inc. Ltd. All rights reserved.* Copyright (c) 1995-1999 Microsoft Corporation. All rights reserved.\*****************************************************************************/
#include "precomp.h"
#include "d3ddelta.h"
#include "d3dhw.h"
#include "d3dcntxt.h"
#if defined(_ALPHA_)
#include <math.h>
#endif
//-----------------------------------------------------------------------------
//
// VOID P2_Draw_FVF_Solid_Tri
//
// Hardware render a single triangle coming from three FVF vertices
//
//-----------------------------------------------------------------------------
VOIDP2_Draw_FVF_Solid_Tri(PERMEDIA_D3DCONTEXT *pContext, LPD3DTLVERTEX lpV0, LPD3DTLVERTEX lpV1, LPD3DTLVERTEX lpV2, LPP2FVFOFFSETS lpFVFOff){ DWORD dwFlags = pContext->Hdr.Flags; DWORD dwColorOffs,dwSpecularOffs,dwTexOffs; ULONG ulRenderCmd = pContext->RenderCommand; D3DCOLOR dwColor0, dwColor1, dwColor2; D3DCOLOR dwSpec0, dwSpec1, dwSpec2; D3DVALUE fS0, fS1, fS2, fT0, fT1, fT2, fQ0, fQ1, fQ2; D3DVALUE fKs0, fKs1, fKs2; PERMEDIA_DEFS(pContext->ppdev);
DBG_D3D((10,"Entering P2_Draw_FVF_Solid_Tri"));
// Set triangle rendering mode
RENDER_TRAPEZOID(ulRenderCmd);
RESERVEDMAPTR(0x80);
// Get FVF structure offsets
__SetFVFOffsets(&dwColorOffs,&dwSpecularOffs,&dwTexOffs,lpFVFOff);
// Get vertex color value (FVF based)
if (dwColorOffs) { dwColor0 = FVFCOLOR(lpV0, dwColorOffs)->color; dwColor1 = FVFCOLOR(lpV1, dwColorOffs)->color; dwColor2 = FVFCOLOR(lpV2, dwColorOffs)->color; if (FAKE_ALPHABLEND_MODULATE & pContext->FakeBlendNum) { dwColor0 |= 0xFF000000; dwColor1 |= 0xFF000000; dwColor2 |= 0xFF000000; } } else { // must set default in case no D3DFVF_DIFFUSE
dwColor0 = 0xFFFFFFFF; dwColor1 = 0xFFFFFFFF; dwColor2 = 0xFFFFFFFF; } // Get vertex specular value (FVF based) if necessary
if ((dwFlags & (CTXT_HAS_SPECULAR_ENABLED | CTXT_HAS_FOGGING_ENABLED)) && (dwSpecularOffs!=0)) { dwSpec0 = FVFSPEC(lpV0, dwSpecularOffs)->specular; dwSpec1 = FVFSPEC(lpV1, dwSpecularOffs)->specular; dwSpec2 = FVFSPEC(lpV2, dwSpecularOffs)->specular; }
if ( (dwFlags & CTXT_HAS_TEXTURE_ENABLED) && (dwTexOffs != 0) ) { // Get s,t texture coordinates (FVF based)
fS0 = FVFTEX(lpV0,dwTexOffs)->tu; fT0 = FVFTEX(lpV0,dwTexOffs)->tv; fS1 = FVFTEX(lpV1,dwTexOffs)->tu; fT1 = FVFTEX(lpV1,dwTexOffs)->tv; fS2 = FVFTEX(lpV2,dwTexOffs)->tu; fT2 = FVFTEX(lpV2,dwTexOffs)->tv;
// The hw requires us to keep the texture coordinates centered around 0
// and avoid exceeding the texel wrapping limit.
RECENTER_TEX_COORDS(pContext->MaxTextureXf, pContext->MaxTextureXi, fS0, fS1, fS2); RECENTER_TEX_COORDS(pContext->MaxTextureYf, pContext->MaxTextureYi, fT0, fT1, fT2);
// Wrap texture coordinates if necessary
WRAP(fS,dwFlags & CTXT_HAS_WRAPU_ENABLED); WRAP(fT,dwFlags & CTXT_HAS_WRAPV_ENABLED);
// Scale s,t coordinate values
fS0 *= pContext->DeltaWidthScale; fS1 *= pContext->DeltaWidthScale; fS2 *= pContext->DeltaWidthScale; fT0 *= pContext->DeltaHeightScale; fT1 *= pContext->DeltaHeightScale; fT2 *= pContext->DeltaHeightScale;
// Apply perspective corrections if necessary
if (dwFlags & CTXT_HAS_PERSPECTIVE_ENABLED) { fQ0 = lpV0->rhw; fQ1 = lpV1->rhw; fQ2 = lpV2->rhw;
fS0 *= fQ0; fT0 *= fQ0;
fS1 *= fQ1; fT1 *= fQ1;
fS2 *= fQ2; fT2 *= fQ2; } else { fQ0 = fQ1 = fQ2 = 1.0; }
// Send lines s,t,q,ks (conditionaly),x,y,z values
if ((dwFlags & CTXT_HAS_SPECULAR_ENABLED) && (dwSpecularOffs!=0)) { fKs0 = RGB256_TO_LUMA(RGB_GETRED(dwSpec0), RGB_GETGREEN(dwSpec0), RGB_GETBLUE(dwSpec0)); if (dwFlags & CTXT_HAS_GOURAUD_ENABLED) { fKs1 = RGB256_TO_LUMA(RGB_GETRED(dwSpec1), RGB_GETGREEN(dwSpec1), RGB_GETBLUE(dwSpec1)); fKs2 = RGB256_TO_LUMA(RGB_GETRED(dwSpec2), RGB_GETGREEN(dwSpec2), RGB_GETBLUE(dwSpec2)); } else { fKs2 = fKs1 = fKs0; }
SEND_VERTEX_STQ_KS_XYZ(__Permedia2TagV0FloatS, fS0, fT0, fQ0, fKs0, lpV0->sx, lpV0->sy, lpV0->sz); SEND_VERTEX_STQ_KS_XYZ(__Permedia2TagV1FloatS, fS1, fT1, fQ1, fKs1, lpV1->sx, lpV1->sy, lpV1->sz); SEND_VERTEX_STQ_KS_XYZ(__Permedia2TagV2FloatS, fS2, fT2, fQ2, fKs2, lpV2->sx, lpV2->sy, lpV2->sz); } else { SEND_VERTEX_STQ_XYZ(__Permedia2TagV0FloatS, fS0, fT0, fQ0, lpV0->sx, lpV0->sy, lpV0->sz); SEND_VERTEX_STQ_XYZ(__Permedia2TagV1FloatS, fS1, fT1, fQ1, lpV1->sx, lpV1->sy, lpV1->sz); SEND_VERTEX_STQ_XYZ(__Permedia2TagV2FloatS, fS2, fT2, fQ2, lpV2->sx, lpV2->sy, lpV2->sz); }
} else // not textured triangle
{ // If specular is enabled, change the colours
if ((dwFlags & CTXT_HAS_SPECULAR_ENABLED) && (dwSpecularOffs!=0)) { CLAMP8888(dwColor0, dwColor0, dwSpec0); CLAMP8888(dwColor1, dwColor1, dwSpec1); CLAMP8888(dwColor2, dwColor2, dwSpec2); }
// Send triangles x,y,z values
SEND_VERTEX_XYZ(__Permedia2TagV0FloatS, lpV0->sx, lpV0->sy, lpV0->sz); SEND_VERTEX_XYZ(__Permedia2TagV1FloatS, lpV1->sx, lpV1->sy, lpV1->sz); SEND_VERTEX_XYZ(__Permedia2TagV2FloatS, lpV2->sx, lpV2->sy, lpV2->sz); }
// If fog is set, send the appropriate values
if ((dwFlags & CTXT_HAS_FOGGING_ENABLED) && (dwSpecularOffs!=0)) { SEND_VERTEX_FOG(__Permedia2TagV0FixedF, RGB_GET_GAMBIT_FOG(dwSpec0)); SEND_VERTEX_FOG(__Permedia2TagV1FixedF, RGB_GET_GAMBIT_FOG(dwSpec1)); SEND_VERTEX_FOG(__Permedia2TagV2FixedF, RGB_GET_GAMBIT_FOG(dwSpec2)); }
// Set alpha stippling if required by context
if (dwFlags & CTXT_HAS_ALPHASTIPPLE_ENABLED) { SET_STIPPLED_ALPHA( (RGBA_GETALPHA(lpV0->color) >> 4) ); }
// Send appropriate color depending on Gouraud , Mono, & Alpha
if (dwFlags & CTXT_HAS_GOURAUD_ENABLED) { // Gouraud shading
if (RENDER_MONO) { SEND_VERTEX_RGB_MONO(__Permedia2TagV0FixedS, dwColor0); SEND_VERTEX_RGB_MONO(__Permedia2TagV1FixedS, dwColor1); SEND_VERTEX_RGB_MONO(__Permedia2TagV2FixedS, dwColor2); } else { if (dwFlags & CTXT_HAS_ALPHABLEND_ENABLED) { if (pContext->FakeBlendNum & FAKE_ALPHABLEND_ONE_ONE) { dwColor0 &= 0xFFFFFF; // supress color's alpha value
dwColor1 &= 0xFFFFFF; dwColor2 &= 0xFFFFFF; } SEND_VERTEX_RGBA(__Permedia2TagV0FixedS, dwColor0); SEND_VERTEX_RGBA(__Permedia2TagV1FixedS, dwColor1); SEND_VERTEX_RGBA(__Permedia2TagV2FixedS, dwColor2); } else { SEND_VERTEX_RGB(__Permedia2TagV0FixedS, dwColor0); SEND_VERTEX_RGB(__Permedia2TagV1FixedS, dwColor1); SEND_VERTEX_RGB(__Permedia2TagV2FixedS, dwColor2); } } } else // Flat shading
{ if (RENDER_MONO) { // Get constant color from the blue channel
DWORD BlueChannel = RGBA_GETBLUE(dwColor0); SEND_PERMEDIA_DATA( ConstantColor, RGB_MAKE(BlueChannel, BlueChannel, BlueChannel)); } else { if (pContext->FakeBlendNum & FAKE_ALPHABLEND_ONE_ONE) { dwColor0 &= 0xFFFFFF; }
SEND_PERMEDIA_DATA( ConstantColor, RGBA_MAKE(RGBA_GETBLUE(dwColor0), RGBA_GETGREEN(dwColor0), RGBA_GETRED(dwColor0), RGBA_GETALPHA(dwColor0))); } }
SEND_PERMEDIA_DATA(DrawTriangle, ulRenderCmd); COMMITDMAPTR();
DBG_D3D((10,"Exiting P2_Draw_FVF_Solid_Tri"));
} // P2_Draw_FVF_Solid_Tri
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