Profile.cpp

// Profile conversion routines
// Copyright © 2004-2007 Glenn Fiedler
// Part of the PixelToaster Framebuffer Library - http://www.pixeltoaster.com

#include "PixelToaster.h"
#include <stdio.h>
#include <stdlib.h>

using namespace PixelToaster;

const char* getFormatString(Format format)
{
    switch (format)
    {
        case Format::XRGB8888: return "truecolor";
        case Format::XBGR8888: return "xbgr8888";
        case Format::RGB888: return "rgb888";
        case Format::BGR888: return "bgr888";
        case Format::RGB565: return "rgb565";
        case Format::BGR565: return "bgr565";
        case Format::XRGB1555: return "xrgb1555";
        case Format::XBGR1555: return "xbgr1555";
        case Format::XBGRFFFF: return "floating point";
        default: return "???";
    }
}

const float duration = 1.0f;

Timer timer;

void profilePixelConverter(Format format, const Pixel* source, void* destination, int count)
{
    printf("   floating point -> %s", getFormatString(format));

    Converter* converter = requestConverter(Format::XBGRFFFF, format);

    if (!converter)
    {
        printf("\n     failed: null converter\n");
        exit(1);
    }

    double startTime = timer.time();

    double time = 0.0;

    int iterations = 0;

    while (time < duration)
    {
        converter->convert(source, destination, count);
        time = timer.time() - startTime;
        iterations++;
    }

    printf(" = %f ms\n", (double)time / iterations * 1000);
}

void profileIntegerConverter(Format format, const integer32* source, void* destination, int count)
{
    printf("   truecolor -> %s", getFormatString(format));

    Converter* converter = requestConverter(Format::XRGB8888, format);

    if (!converter)
    {
        printf("\n     failed: null converter\n");
        exit(1);
    }

    double startTime = timer.time();

    double time = 0.0;

    int iterations = 0;

    while (time < duration)
    {
        converter->convert(source, destination, count);
        time = timer.time() - startTime;
        iterations++;
    }

    printf(" = %f ms\n", (double)time / iterations * 1000);
}

int main()
{
    const int width  = 256;
    const int height = 256;

    vector<Pixel> pixelSource(width * height);

    for (unsigned int i = 0; i < pixelSource.size(); ++i)
    {
        pixelSource[i].r = 1.5;
        pixelSource[i].g = 0.5;
        pixelSource[i].b = 0.25;
        pixelSource[i].a = 0;
    }

    vector<integer32> integerSource(width * height);

    for (unsigned int i = 0; i < integerSource.size(); ++i)
        integerSource[i] = 0x00FF6677;

    integer8* destination = new integer8[width * height * 16];

    printf("\n[ PixelToaster Profiling Suite ]\n\n");

    printf("floating point color conversion routines:\n\n");

    profilePixelConverter(Format::XBGRFFFF, &pixelSource[0], destination, (int)pixelSource.size());
    profilePixelConverter(Format::XRGB8888, &pixelSource[0], destination, (int)pixelSource.size());
    profilePixelConverter(Format::XBGR8888, &pixelSource[0], destination, (int)pixelSource.size());
    profilePixelConverter(Format::RGB888, &pixelSource[0], destination, (int)pixelSource.size());
    profilePixelConverter(Format::BGR888, &pixelSource[0], destination, (int)pixelSource.size());
    profilePixelConverter(Format::RGB565, &pixelSource[0], destination, (int)pixelSource.size());
    profilePixelConverter(Format::BGR565, &pixelSource[0], destination, (int)pixelSource.size());
    profilePixelConverter(Format::XRGB1555, &pixelSource[0], destination, (int)pixelSource.size());
    profilePixelConverter(Format::XBGR1555, &pixelSource[0], destination, (int)pixelSource.size());

    printf("\ntruecolor conversion routines:\n\n");

    profileIntegerConverter(Format::XBGRFFFF, &integerSource[0], destination, (int)integerSource.size());
    profileIntegerConverter(Format::XRGB8888, &integerSource[0], destination, (int)integerSource.size());
    profileIntegerConverter(Format::XBGR8888, &integerSource[0], destination, (int)integerSource.size());
    profileIntegerConverter(Format::RGB888, &integerSource[0], destination, (int)integerSource.size());
    profileIntegerConverter(Format::BGR888, &integerSource[0], destination, (int)integerSource.size());
    profileIntegerConverter(Format::RGB565, &integerSource[0], destination, (int)integerSource.size());
    profileIntegerConverter(Format::BGR565, &integerSource[0], destination, (int)integerSource.size());
    profileIntegerConverter(Format::XRGB1555, &integerSource[0], destination, (int)integerSource.size());
    profileIntegerConverter(Format::XBGR1555, &integerSource[0], destination, (int)integerSource.size());

    printf("\n");
}