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134 lines
3.5 KiB
134 lines
3.5 KiB
///////////////////////////////////////////////////////////////////////////////
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// Copyright (C) Microsoft Corporation, 2000.
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//
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// PixRef.cpp
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//
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// Direct3D Reference Device - Pixel Buffer Referencing
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//
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///////////////////////////////////////////////////////////////////////////////
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#include "pch.cpp"
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#pragma hdrstop
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extern int g_DXTBlkSize[];
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//-----------------------------------------------------------------------------
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//
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// PixelAddress - Form character address of locations within buffers using base
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// pointer, pitch and type.
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//
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//-----------------------------------------------------------------------------
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//
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// common internal version
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//
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char*
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PixelAddress(
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int iX, int iY, int iZ, int iSample,
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BYTE* pBits, int iYPitch, int iZPitch, int cSamples, RDSurfaceFormat SType )
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{
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// initialize return value to start of scan line (pitch is always in bytes)
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BYTE* pPixAddr = pBits + iY*iYPitch + iZ*iZPitch;
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// bump along scan line depending on surface type to point to pixel data
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switch ( SType )
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{
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default:
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_ASSERTf(0, ("Unknown RDSurfaceFormat value %08x", SType));
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return NULL;
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case RD_SF_NULL:
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break;
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case RD_SF_B8G8R8A8:
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case RD_SF_B8G8R8X8:
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case RD_SF_U8V8L8X8:
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case RD_SF_Z24S8:
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case RD_SF_Z24X8:
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case RD_SF_S8Z24:
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case RD_SF_X8Z24:
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case RD_SF_Z24X4S4:
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case RD_SF_X4S4Z24:
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case RD_SF_Z32S0:
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case RD_SF_U8V8W8Q8:
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case RD_SF_U10V11W11:
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case RD_SF_U16V16:
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case RD_SF_R10G10B10A2:
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case RD_SF_R8G8B8A8:
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case RD_SF_R8G8B8X8:
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case RD_SF_R16G16:
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case RD_SF_U11V11W10:
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case RD_SF_U10V10W10A2:
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case RD_SF_U8V8X8A8:
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case RD_SF_U8V8X8L8:
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pPixAddr += (iX*cSamples*4 + iSample*4);
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break;
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case RD_SF_B5G6R5:
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case RD_SF_B5G5R5X1:
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case RD_SF_B5G5R5A1:
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case RD_SF_P8A8:
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case RD_SF_L8A8:
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case RD_SF_U8V8:
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case RD_SF_U5V5L6:
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case RD_SF_Z16S0:
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case RD_SF_Z15S1:
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case RD_SF_S1Z15:
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case RD_SF_B4G4R4A4:
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case RD_SF_B4G4R4X4:
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case RD_SF_YUY2:
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case RD_SF_UYVY:
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case RD_SF_B2G3R3A8:
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pPixAddr += (iX*cSamples*2 + iSample*2);
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break;
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case RD_SF_B8G8R8:
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pPixAddr += (iX*cSamples*3 + iSample*3);
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break;
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case RD_SF_PALETTE8:
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case RD_SF_L8:
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case RD_SF_A8:
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case RD_SF_B2G3R3:
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case RD_SF_L4A4:
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pPixAddr += (iX*cSamples*1 + iSample*1);
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break;
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case RD_SF_PALETTE4:
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pPixAddr += (iX>>1);
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break;
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// For the DXT texture formats, obtain the address of the
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// block from whih to decompress the texel from
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case RD_SF_DXT1:
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case RD_SF_DXT2:
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case RD_SF_DXT3:
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case RD_SF_DXT4:
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case RD_SF_DXT5:
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pPixAddr = pBits + iZ*iZPitch + (iY >> 2)*iYPitch + (iX>>2) *
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g_DXTBlkSize[(int)SType - (int)RD_SF_DXT1];
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break;
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}
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return (char *)pPixAddr;
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}
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//
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// external versions
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//
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char*
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PixelAddress(
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int iX, int iY, int iZ,
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BYTE* pBits, int iYPitch, int iZPitch, RDSurfaceFormat SType )
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{
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return PixelAddress( iX, iY, iZ, 0, pBits, iYPitch, iZPitch, 1, SType );
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}
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char*
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PixelAddress(
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int iX, int iY, int iZ, int iSample, RDSurface2D* pRT )
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{
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return PixelAddress( iX, iY, iZ, iSample,
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pRT->GetBits(), pRT->GetPitch(), 0 /* pRT->GetSlicePitch() */,
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pRT->GetSamples(), pRT->GetSurfaceFormat() );
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}
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///////////////////////////////////////////////////////////////////////////////
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// end
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