iffPixelCmd.cpp

//-
// ==========================================================================
// Copyright 1995,2006,2008 Autodesk, Inc. All rights reserved.
//
// Use of this software is subject to the terms of the Autodesk
// license agreement provided at the time of installation or download,
// or which otherwise accompanies this software in either electronic
// or hard copy form.
// ==========================================================================
//+

#include <maya/MPxCommand.h>
#include <maya/MStatus.h>
#include <maya/MArgList.h>
#include <maya/MFnPlugin.h>
#include <maya/MObject.h>
#include <maya/MGlobal.h>
#include <maya/MString.h>
#include <maya/MPoint.h>
#include "iffreader.h"


#ifndef OSMac_
#include <maya/MIOStream.h>
#endif

#define IFFCHECKERR(stat, call) \
if (!stat) { \
        MString string = reader.errorString(); \
    string += " in method "; \
        string += #call; \
    displayError (string); \
        return MS::kFailure; \
}

class iffPixel : public MPxCommand
{
public:
                iffPixel();
    virtual     ~iffPixel();

    MStatus     doIt ( const MArgList& args );
    MStatus     redoIt ();
    MStatus     undoIt ();
    bool        isUndoable() const;

    static      void* creator();

private:
        int         r,g,b,a;
        float       d;
        bool        useDepth;
};

iffPixel::iffPixel()
{
}

iffPixel::~iffPixel() {}

void* iffPixel::creator()
{
    return new iffPixel;
}

bool iffPixel::isUndoable() const
{
    return true;
}

MStatus iffPixel::undoIt()
{
    return MS::kSuccess;
}

MString itoa (int n)
{
        char buffer [256];
        sprintf (buffer, "%d", n);
        return MString (buffer);
}

MStatus iffPixel::doIt( const MArgList& args )
{
    MString componentName;
        if (args.length () < 3 || args.length () > 4) {
                displayError ("Syntax: iffPixel file x y [-depth]");
                return MS::kFailure;
        }

        int x,y;
        MString fileName;

        args.get (0, fileName);
        args.get (1, x);
        args.get (2, y);
        if (args.length () == 4)
        {
                MString lastArg;
                args.get (3, lastArg);
                if (lastArg != MString ("-depth")) {
                        displayError ("Syntax: iffPixel file x y [-depth]");
                        return MS::kFailure;
                }
                useDepth = true;
        }
        else
                useDepth = false;

        IFFimageReader reader;
        MStatus stat;

        stat = reader.open (fileName);
        IFFCHECKERR (stat, open);

        int w,h;
        stat = reader.getSize (w,h);
        IFFCHECKERR (stat, getSize);
        if (x < 0 || x > w || y < 0 || y > h) {
                MString message ("Co-ordinates out of range. Size of image is ");
                message += itoa (w);
                message += "+";
                message += itoa (h);
                displayError (message);
                return MS::kFailure;
        }

        stat = reader.readImage ();
        IFFCHECKERR (stat, readImage);
        if (useDepth)
        {
                if (!reader.hasDepthMap ()) {
                        displayError ("Image has no depth map");
                        return MS::kFailure;
                }
                stat = reader.getDepth (x,y,&d);
        }
        else
        {
                if (!reader.isRGB () && !reader.isGrayscale ()) {
                        displayError ("Image has no RGB data");
                        return MS::kFailure;
                }
                stat = reader.getPixel (x,y,&r,&g,&b,&a);
        }
        IFFCHECKERR (stat, getPixel);

        stat = reader.close ();
        IFFCHECKERR (stat, close);

    return redoIt();
}

MStatus iffPixel::redoIt()
{
    clearResult();
        if (useDepth) {
                appendToResult (d);
        } else {
                appendToResult( r );
                appendToResult( g );
                appendToResult( b );
                appendToResult( a );
        }

    return MS::kSuccess;
}

MStatus initializePlugin( MObject obj )
{
        MStatus status;
    MFnPlugin plugin( obj, PLUGIN_COMPANY, "3.0", "Any");
    status = plugin.registerCommand( "iffPixel", iffPixel::creator );

        if (!status)
                status.perror("registerCommand");

    return status;
}

MStatus uninitializePlugin( MObject obj )
{
        MStatus status;
    MFnPlugin plugin( obj );
    status = plugin.deregisterCommand( "iffPixel" );

        if (!status)
                status.perror("deregisterCommand");

    return status;
}