CWE-ou-minkata/Sources/Plasma/PubUtilLib/plSurface/plShader.cpp

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*==LICENSE==*/


#include "hsTypes.h"
#include "plShader.h"
#include "plShaderTable.h"

#include "hsStream.h"
#include "hsMatrix44.h"
#include "hsColorRGBA.h"

#include "plPipeline/hsGDeviceRef.h"


// Little shader const helper
void plShaderConst::Read(hsStream* s)
{
    fX = s->ReadSwapScalar();
    fY = s->ReadSwapScalar();
    fZ = s->ReadSwapScalar();
    fW = s->ReadSwapScalar();
}

void plShaderConst::Write(hsStream* s)
{
    s->WriteSwapScalar(fX);
    s->WriteSwapScalar(fY);
    s->WriteSwapScalar(fZ);
    s->WriteSwapScalar(fW);
}

//////////////////////////////////////////////////////////////////////////////////
// Real Shader follows
//////////////////////////////////////////////////////////////////////////////////

plShader::plShader()
:   fFlags(0),
    fDeviceRef(nil),
    fInput(0),
    fOutput(0),
    fDecl(0)
{
}

plShader::~plShader()
{
    delete fDeviceRef;
}

void plShader::SetDeviceRef(hsGDeviceRef* ref) const 
{ 
    hsRefCnt_SafeAssign(fDeviceRef, ref); 
}


void plShader::SetMatrix(int i, const plFloat44& xfm)
{
    // Stuff in the transpose
    SetVector(i+0, xfm.m[0][0], xfm.m[1][0], xfm.m[2][0], xfm.m[3][0]);
    SetVector(i+1, xfm.m[0][1], xfm.m[1][1], xfm.m[2][1], xfm.m[3][1]);
    SetVector(i+2, xfm.m[0][2], xfm.m[1][2], xfm.m[2][2], xfm.m[3][2]);
    SetVector(i+3, xfm.m[0][3], xfm.m[1][3], xfm.m[2][3], xfm.m[3][3]);
}

void plShader::SetMatrix3(int i, const plFloat44& xfm)
{
    // Stuff in the transpose
    SetVector(i+0, xfm.m[0][0], xfm.m[1][0], xfm.m[2][0], xfm.m[3][0]);
    SetVector(i+1, xfm.m[0][1], xfm.m[1][1], xfm.m[2][1], xfm.m[3][1]);
    SetVector(i+2, xfm.m[0][2], xfm.m[1][2], xfm.m[2][2], xfm.m[3][2]);
}

void plShader::SetMatrix44(int i, const hsMatrix44& xfm)
{
    // hsMatrix44 is already transpose of the rest of the world
    SetVector(i+0, xfm.fMap[0][0], xfm.fMap[0][1], xfm.fMap[0][2], xfm.fMap[0][3]);
    SetVector(i+1, xfm.fMap[1][0], xfm.fMap[1][1], xfm.fMap[1][2], xfm.fMap[1][3]);
    SetVector(i+2, xfm.fMap[2][0], xfm.fMap[2][1], xfm.fMap[2][2], xfm.fMap[2][3]);
    SetVector(i+3, xfm.fMap[3][0], xfm.fMap[3][1], xfm.fMap[3][2], xfm.fMap[3][3]);
}

void plShader::SetMatrix34(int i, const hsMatrix44& xfm)
{
    // hsMatrix44 is already transpose of the rest of the world
    SetVector(i+0, xfm.fMap[0][0], xfm.fMap[0][1], xfm.fMap[0][2], xfm.fMap[0][3]);
    SetVector(i+1, xfm.fMap[1][0], xfm.fMap[1][1], xfm.fMap[1][2], xfm.fMap[1][3]);
    SetVector(i+2, xfm.fMap[2][0], xfm.fMap[2][1], xfm.fMap[2][2], xfm.fMap[2][3]);
}

void plShader::SetMatrix24(int i, const hsMatrix44& xfm)
{
    // hsMatrix44 is already transpose of the rest of the world
    SetVector(i+0, xfm.fMap[0][0], xfm.fMap[0][1], xfm.fMap[0][2], xfm.fMap[0][3]);
    SetVector(i+1, xfm.fMap[1][0], xfm.fMap[1][1], xfm.fMap[1][2], xfm.fMap[1][3]);
}

void plShader::SetColor(int i, const hsColorRGBA& col)
{
    SetVector(i, col.r, col.g, col.b, col.a);
}

void plShader::SetVector(int i, const hsScalarTriple& vec)
{
    /* Doesn't touch .fW */
    fConsts[i].fX = vec.fX;
    fConsts[i].fY = vec.fY;
    fConsts[i].fZ = vec.fZ;
}

void plShader::SetVector(int i, hsScalar x, hsScalar y, hsScalar z, hsScalar w)
{
    fConsts[i].x = x;
    fConsts[i].y = y;
    fConsts[i].z = z;
    fConsts[i].w = w;
}

void plShader::SetFloat(int i, int chan, float v)
{
    fConsts[i].fArray[chan] = v;
}

void plShader::SetFloat4(int i, const float* const f)
{
    fConsts[i].fX = f[0];
    fConsts[i].fY = f[1];
    fConsts[i].fZ = f[2];
    fConsts[i].fW = f[3];
}

plFloat44 plShader::GetMatrix(int i) const
{
    // untranspose
    plFloat44 xfm;
    int j;
    for( j = 0; j < 4; j++ )
    {
        int k;
        for( k = 0; k < 4; k++ )
            xfm.m[j][k] = fConsts[i+k].fArray[j];
    }
    return xfm;
}

plFloat44 plShader::GetMatrix3(int i) const
{
    // untranspose
    plFloat44 xfm;
    int j;
    for( j = 0; j < 4; j++ )
    {
        int k;
        for( k = 0; k < 3; k++ )
            xfm.m[j][k] = fConsts[i+k].fArray[j];
    }
    xfm.m[0][3] = xfm.m[1][3] = xfm.m[2][3] = 0;
    xfm.m[3][3] = 1.f;
    return xfm;
}

hsMatrix44 plShader::GetMatrix44(int i) const
{
    hsMatrix44 xfm;
    xfm.NotIdentity();
    int j;
    for( j = 0; j < 4; j++ )
    {
        int k;
        for( k = 0; k < 4; k++ )
            xfm.fMap[j][k] = fConsts[i+j][k];
    }

    return xfm;
}

hsMatrix44 plShader::GetMatrix34(int i) const
{
    hsMatrix44 xfm;
    xfm.NotIdentity();
    int j;
    for( j = 0; j < 3; j++ )
    {
        int k;
        for( k = 0; k < 4; k++ )
            xfm.fMap[j][k] = fConsts[i+j][k];
    }
    xfm.fMap[3][0] = xfm.fMap[3][1] = xfm.fMap[3][2] = 0;
    xfm.fMap[3][3] = 1.f;

    return xfm;
}

hsMatrix44 plShader::GetMatrix24(int i) const
{
    hsMatrix44 xfm;
    xfm.NotIdentity();
    int j;
    for( j = 0; j < 2; j++ )
    {
        int k;
        for( k = 0; k < 4; k++ )
            xfm.fMap[j][k] = fConsts[i+j][k];
    }
    xfm.fMap[2][0] = xfm.fMap[2][1] = xfm.fMap[2][2] = xfm.fMap[2][3] = 0;
    xfm.fMap[3][0] = xfm.fMap[3][1] = xfm.fMap[3][2] = 0;
    xfm.fMap[3][3] = 1.f;

    return xfm;
}

hsColorRGBA plShader::GetColor(int i) const
{
    return hsColorRGBA().Set(fConsts[i].r, fConsts[i].g, fConsts[i].b, fConsts[i].a);
}

hsPoint3 plShader::GetPosition(int i) const
{
    return hsPoint3(fConsts[i].fX, fConsts[i].fY, fConsts[i].fZ);
}

hsVector3 plShader::GetVector(int i) const
{
    return hsVector3(fConsts[i].fX, fConsts[i].fY, fConsts[i].fZ);
}

void plShader::GetVector(int i, hsScalar& x, hsScalar& y, hsScalar& z, hsScalar& w) const
{
    x = fConsts[i].x;
    y = fConsts[i].y;
    z = fConsts[i].z;
    w = fConsts[i].w;
}

hsScalar plShader::GetFloat(int i, int chan) const
{
    return fConsts[i].fArray[chan];
}

const float* const plShader::GetFloat4(int i) const
{
    return fConsts[i].fArray;
}

void plShader::Read(hsStream* s, hsResMgr* mgr)
{
    fFlags = 0;

    hsKeyedObject::Read(s, mgr);

    UInt32 n = s->ReadSwap32();
    fConsts.SetCount(n);
    int i;
    for( i = 0; i < n; i++ )
        fConsts[i].Read(s);

    plShaderID::ID id = plShaderID::ID(s->ReadSwap32());
    SetDecl(plShaderTable::Decl(id));

    fInput = s->ReadByte();
    fOutput = s->ReadByte();
}

void plShader::Write(hsStream* s, hsResMgr* mgr)
{
    hsKeyedObject::Write(s, mgr);

    s->WriteSwap32(fConsts.GetCount());
    int i;
    for( i = 0; i < fConsts.GetCount(); i++ )
        fConsts[i].Write(s);

    s->WriteSwap32(fDecl->GetID());

    s->WriteByte(fInput);
    s->WriteByte(fOutput);
}

void plShader::SetDecl(const plShaderDecl* decl)
{
    fDecl = decl;
}

void plShader::SetDecl(plShaderID::ID id)
{
    SetDecl(plShaderTable::Decl(id));
}

void plShader::SetNumPipeConsts(int n)
{
    int nOld = fPipeConsts.GetCount();
    if( n > nOld )
    {
        // This will copy forward any existing entries.
        fPipeConsts.Expand(n);
    }
    fPipeConsts.SetCount(n);
}