///////////////////////////////////////////////////////////////////////////

//

// Copyright (c) 2004-2012, Industrial Light & Magic, a division of Lucas

// Digital Ltd. LLC

// 

// All rights reserved.

// 

// Redistribution and use in source and binary forms, with or without

// modification, are permitted provided that the following conditions are

// met:

// *       Redistributions of source code must retain the above copyright

// notice, this list of conditions and the following disclaimer.

// *       Redistributions in binary form must reproduce the above

// copyright notice, this list of conditions and the following disclaimer

// in the documentation and/or other materials provided with the

// distribution.

// *       Neither the name of Industrial Light & Magic nor the names of

// its contributors may be used to endorse or promote products derived

// from this software without specific prior written permission. 

// 

// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

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///////////////////////////////////////////////////////////////////////////

#include "compareB44.h"

#include "compareDwa.h"

#include <ImfRgbaFile.h>

#include <ImfArray.h>

#include <string>

#include <stdio.h>

#include <assert.h>

#include <ImathRandom.h>

#include <ImfThreading.h>

#include <IlmThread.h>

using namespace OPENEXR_IMF_NAMESPACE;

using namespace std;

using namespace IMATH_NAMESPACE;

namespace {

Rand32 rand1 (27);

void

fillPixels (Array2D<Rgba> &pixels, int w, int h)

{

    for (int y = 0; y < h; ++y)

    {

	for (int x = 0; x < w; ++x)

	{

	    Rgba &p = pixels[y][x];

	    p.r = 0.5 + 0.5 * sin (0.1 * x + 0.1 * y);

	    p.g = 0.5 + 0.5 * sin (0.1 * x + 0.2 * y);

	    p.b = 0.5 + 0.5 * sin (0.1 * x + 0.3 * y);

	    p.a = (p.r + p.b + p.g) / 3.0;

	}

    }

}

void

writeReadRGBA (const char fileName[],

	       int width,

	       int height,

	       const Array2D<Rgba> &p1,

	       RgbaChannels channels,

	       LineOrder lorder,

	       Compression comp)

{

    //

    // Save the selected channels of RGBA image p1; save the

    // scan lines in the specified order.  Read the image back

    // from the file, and compare the data with the orignal.

    //

    cout << "channels " <<

	    ((channels & WRITE_R)? "R": "") <<

	    ((channels & WRITE_G)? "G": "") <<

	    ((channels & WRITE_B)? "B": "") <<

	    ((channels & WRITE_A)? "A": "") <<

	    ", line order " << lorder <<

	    ", compression " << comp << endl;

    Header header (width, height);

    header.lineOrder() = lorder;

    header.compression() = comp;

    {

	remove (fileName);

	RgbaOutputFile out (fileName, header, channels);

        out.setFrameBuffer (&p1[0][0], 1, width);

        int numLeft = height;

        int numWrite = 1;

	//

        // Iterate over all scanlines, and write them out in random-size chunks

	//

        while (numLeft)

        {

            numWrite = int (rand1.nextf() * numLeft + 0.5f);

            out.writePixels (numWrite);

            numLeft -= numWrite;

        }

    }

    {

	RgbaInputFile in (fileName);

	const Box2i &dw = in.dataWindow();

	int w = dw.max.x - dw.min.x + 1;

	int h = dw.max.y - dw.min.y + 1;

	int dx = dw.min.x;

	int dy = dw.min.y;

	Array2D<Rgba> p2 (h, w);

	in.setFrameBuffer (&p2[-dy][-dx], 1, w);

	in.readPixels (dw.min.y, dw.max.y);

	assert (in.displayWindow() == header.displayWindow());

	assert (in.dataWindow() == header.dataWindow());

	assert (in.pixelAspectRatio() == header.pixelAspectRatio());

	assert (in.screenWindowCenter() == header.screenWindowCenter());

	assert (in.screenWindowWidth() == header.screenWindowWidth());

	assert (in.lineOrder() == header.lineOrder());

	assert (in.compression() == header.compression());

	assert (in.channels() == channels);

	if (in.compression() == B44_COMPRESSION ||

	    in.compression() == B44A_COMPRESSION)

	{

	    compareB44 (w, h, p1, p2, channels);

	}

	else if (in.compression() == DWAA_COMPRESSION ||

	         in.compression() == DWAB_COMPRESSION)

	{

	    compareDwa (w, h, p1, p2, channels);

	}

	else

	{

	    for (int y = 0; y < h; ++y)

	    {

		for (int x = 0; x < w; ++x)

		{

		    if (channels & WRITE_R)

			assert (p2[y][x].r == p1[y][x].r);

		    else

			assert (p2[y][x].r == 0);

		    if (channels & WRITE_G)

			assert (p2[y][x].g == p1[y][x].g);

		    else

			assert (p2[y][x].g == 0);

		    if (channels & WRITE_B)

			assert (p2[y][x].b == p1[y][x].b);

		    else

			assert (p2[y][x].b == 0);

		    if (channels & WRITE_A)

			assert (p2[y][x].a == p1[y][x].a);

		    else

			assert (p2[y][x].a == 1);

		}

	    }

	}

    }

    remove (fileName);

}

} // namespace

void

testRgbaThreading (const std::string &tempDir)

{

    try

    {

        cout << "Testing setGlobalThreadCount()" << endl;

        if (!ILMTHREAD_NAMESPACE::supportsThreads ())

        {

            cout << "   Threading not supported!" << endl << endl;

            return;

        }

        for (int i = 0; i < 10000; i++)

        {

            int numThreads = int (rand1.nextf() * 32 + 0.5f);

            setGlobalThreadCount (numThreads);

            if (i % 2000 == 0)

                cout << "." << flush;

        }

        cout << "\nok\n" << endl;

	cout << "Testing multi-threaded writing of scanlines\n"

		"in random-sized blocks" << endl;

	const int W = 237;

	const int H = 119;

	Array2D<Rgba> p1 (H, W);

	fillPixels (p1, W, H);

        for (int n = 0; n <= 8; n++)

        {

            int numThreads = (n * 3) % 8;

            setGlobalThreadCount (numThreads);

            cout << "number of threads: " << globalThreadCount () << endl;

            for (int comp = 0; comp < NUM_COMPRESSION_METHODS; ++comp)

            {

                for (int lorder = 0; lorder < RANDOM_Y; ++lorder)

                {

                    writeReadRGBA ((tempDir + "imf_test_rgba.exr").c_str(),

                                   W, H, p1,

                                   WRITE_RGBA,

                                   LineOrder (lorder),

                                   Compression (comp));

                    writeReadRGBA ((tempDir + "imf_test_rgba.exr").c_str(),

                                   W, H, p1,

                                   WRITE_RGB,

                                   LineOrder (lorder),

                                   Compression (comp));

                    writeReadRGBA ((tempDir + "imf_test_rgba.exr").c_str(),

                                   W, H, p1,

                                   WRITE_A,

                                   LineOrder (lorder),

                                   Compression (comp));

                    writeReadRGBA ((tempDir + "imf_test_rgba.exr").c_str(),

                                   W, H, p1,

                                   RgbaChannels (WRITE_R | WRITE_B),

                                   LineOrder (lorder),

                                   Compression (comp));

                }

            }

        }

	cout << "ok\n" << endl;

    }

    catch (const std::exception &e)

    {

	cerr << "ERROR -- caught exception: " << e.what() << endl;

	assert (false);

    }

}