C++ BooleanParamDescriptor::setDefault方法代码示例

void describeWriterParamsInContext( OFX::ImageEffectDescriptor& desc,
				    OFX::EContext               context )
{
	OFX::StringParamDescriptor* filename = desc.defineStringParam( kTuttlePluginFilename );
	filename->setLabel( kTuttlePluginFilenameLabel );
	filename->setStringType( OFX::eStringTypeFilePath );
	filename->setCacheInvalidation( OFX::eCacheInvalidateValueAll );
	desc.addClipPreferencesSlaveParam( *filename );

	OFX::ChoiceParamDescriptor* channel = desc.defineChoiceParam( kTuttlePluginChannel );
	channel->setLabel( kTuttlePluginChannelLabel );
	channel->appendOption( kTuttlePluginChannelAuto );
	channel->appendOption( kTuttlePluginChannelGray );
	channel->appendOption( kTuttlePluginChannelRGB );
	channel->appendOption( kTuttlePluginChannelRGBA );
	channel->setDefault( 0 );

	OFX::ChoiceParamDescriptor* bitDepth = desc.defineChoiceParam( kTuttlePluginBitDepth );
	bitDepth->setLabel( kTuttlePluginBitDepthLabel );
	bitDepth->appendOption( kTuttlePluginBitDepth8 );
	bitDepth->appendOption( kTuttlePluginBitDepth16 );
	bitDepth->setDefault( 0 );
	
	OFX::BooleanParamDescriptor* premult = desc.defineBooleanParam( kParamPremultiplied );
	premult->setLabel( kParamPremultipliedLabel );
	premult->setDefault( false );
	
	OFX::PushButtonParamDescriptor* render = desc.definePushButtonParam( kParamWriterRender );
	render->setLabels( "Render", "Render", "Render step" );
	render->setHint("Force render (writing)");

	OFX::BooleanParamDescriptor* renderAlways = desc.defineBooleanParam( kParamWriterRenderAlways );
	renderAlways->setLabel( "Render always" );
//	renderAlways->setDefault( false );
	renderAlways->setDefault( true ); // because tuttle is not declared as a background renderer

	OFX::IntParamDescriptor* forceNewRender = desc.defineIntParam( kParamWriterForceNewRender );
	forceNewRender->setLabel( "Force new render" );
	forceNewRender->setEnabled( false );
	forceNewRender->setIsSecret( true );
	forceNewRender->setIsPersistant( false );
	forceNewRender->setAnimates( false );
	forceNewRender->setCacheInvalidation( OFX::eCacheInvalidateValueAll );
	forceNewRender->setEvaluateOnChange( true );
	forceNewRender->setDefault( 0 );
}

/**
 * @brief Function called to describe the plugin controls and features.
 * @param[in, out]   desc       Effect descriptor
 * @param[in]        context    Application context
 */
void TextPluginFactory::describeInContext( OFX::ImageEffectDescriptor& desc,
                                           OFX::EContext               context )
{
	OFX::ClipDescriptor* srcClip = desc.defineClip( kOfxImageEffectSimpleSourceClipName );
	srcClip->addSupportedComponent( OFX::ePixelComponentRGBA );
	srcClip->addSupportedComponent( OFX::ePixelComponentRGB );
	srcClip->addSupportedComponent( OFX::ePixelComponentAlpha );
	srcClip->setSupportsTiles( kSupportTiles );

	// Create the mandated output clip
	OFX::ClipDescriptor* dstClip = desc.defineClip( kOfxImageEffectOutputClipName );
	dstClip->addSupportedComponent( OFX::ePixelComponentRGBA );
	dstClip->addSupportedComponent( OFX::ePixelComponentRGB );
	dstClip->addSupportedComponent( OFX::ePixelComponentAlpha );
	dstClip->setSupportsTiles( kSupportTiles );

	OFX::StringParamDescriptor* text = desc.defineStringParam( kText );
	text->setLabel( "Text" );
	text->setStringType( OFX::eStringTypeMultiLine );

	OFX::StringParamDescriptor* font = desc.defineStringParam( kFont );
	font->setLabel( "Font file" );
	font->setStringType( OFX::eStringTypeFilePath );
	font->setDefault( "/usr/share/fonts/truetype/msttcorefonts/arial.ttf" );

	OFX::IntParamDescriptor* size = desc.defineIntParam( kSize );
	size->setLabel( "Size" );
	size->setDefault( 18 );
	size->setRange( 0, std::numeric_limits<int>::max() );
	size->setDisplayRange( 0, 60 );

	OFX::DoubleParamDescriptor* ratio = desc.defineDoubleParam( kRatio );
	ratio->setLabel( "Ratio" );
	ratio->setRange( 0.0, std::numeric_limits<double>::max() );
	ratio->setDisplayRange( 0.0, 2.0 );
	ratio->setDefault( 1.0 );

	OFX::RGBAParamDescriptor* color = desc.defineRGBAParam( kColor );
	color->setLabel( "Color" );
	color->setDefault( 1.0, 1.0, 1.0, 1.0 );

	OFX::Double2DParamDescriptor* position = desc.defineDouble2DParam( kPosition );
	position->setLabel( "Position" );
	position->setDefault( 0.0, 0.0 );

	OFX::DoubleParamDescriptor* letterSpacing = desc.defineDoubleParam( kLetterSpacing );
	letterSpacing->setLabel( "Letter spacing" );
	letterSpacing->setDisplayRange( -10.0, 10.0 );
	letterSpacing->setDefault( 0.0 );

	OFX::BooleanParamDescriptor* verticalFlip = desc.defineBooleanParam( kVerticalFlip );
	verticalFlip->setLabel( "Vertical flip" );
	verticalFlip->setDefault( false );
	verticalFlip->setAnimates( false );
	verticalFlip->setHint( "Some hosts use inverted images, so you can correct this problem using this flag." );

}

/**
 * @brief Function called to describe the plugin controls and features.
 * @param[in, out]   desc       Effect descriptor
 * @param[in]        context    Application context
 */
void OpenImageIOWriterPluginFactory::describeInContext( OFX::ImageEffectDescriptor& desc,
                                                        OFX::EContext               context )
{
	OFX::ClipDescriptor* srcClip = desc.defineClip( kOfxImageEffectSimpleSourceClipName );

	srcClip->addSupportedComponent( OFX::ePixelComponentRGBA );
	srcClip->addSupportedComponent( OFX::ePixelComponentRGB );
	srcClip->addSupportedComponent( OFX::ePixelComponentAlpha );
	srcClip->setSupportsTiles( kSupportTiles );

	OFX::ClipDescriptor* dstClip = desc.defineClip( kOfxImageEffectOutputClipName );
	dstClip->addSupportedComponent( OFX::ePixelComponentRGBA );
	dstClip->addSupportedComponent( OFX::ePixelComponentRGB );
	dstClip->addSupportedComponent( OFX::ePixelComponentAlpha );
	dstClip->setSupportsTiles( kSupportTiles );

	// Controls
	OFX::StringParamDescriptor* filename = desc.defineStringParam( kParamWriterFilename );
	filename->setLabel( "Filename" );
	filename->setStringType( OFX::eStringTypeFilePath );
	filename->setCacheInvalidation( OFX::eCacheInvalidateValueAll );
	desc.addClipPreferencesSlaveParam( *filename );

	OFX::ChoiceParamDescriptor* components = desc.defineChoiceParam( kParamOutputComponents );
	components->setLabel( "Components" );
	components->appendOption( kParamOutputComponentsRGBA );
	components->appendOption( kParamOutputComponentsRGB );
	components->setCacheInvalidation( OFX::eCacheInvalidateValueAll );
	components->setDefault( 0 );

	OFX::ChoiceParamDescriptor* bitDepth = desc.defineChoiceParam( kParamWriterBitDepth );
	bitDepth->setLabel( "Bit depth" );
	bitDepth->appendOption( kTuttlePluginBitDepth8 );
	bitDepth->appendOption( kTuttlePluginBitDepth16 );
	bitDepth->appendOption( kTuttlePluginBitDepth32f );
	bitDepth->setCacheInvalidation( OFX::eCacheInvalidateValueAll );
	bitDepth->setDefault( 1 );

	OFX::PushButtonParamDescriptor* render = desc.definePushButtonParam( kParamWriterRender );
	render->setLabels( "Render", "Render", "Render step" );
	render->setHint( "Force render (writing)" );

	OFX::BooleanParamDescriptor* renderAlways = desc.defineBooleanParam( kParamWriterRenderAlways );
	renderAlways->setLabel( "Render always" );
	renderAlways->setCacheInvalidation( OFX::eCacheInvalidateValueAll );
	renderAlways->setDefault( false );

	OFX::IntParamDescriptor* forceNewRender = desc.defineIntParam( kParamWriterForceNewRender );
	forceNewRender->setLabel( "Force new render" );
	forceNewRender->setIsSecret( true );
	forceNewRender->setIsPersistant( false );
	forceNewRender->setAnimates( false );
	forceNewRender->setCacheInvalidation( OFX::eCacheInvalidateValueAll );
	forceNewRender->setEvaluateOnChange( true );
	forceNewRender->setDefault( 0 );
}

/**
 * @brief Function called to describe the plugin controls and features.
 * @param[in, out]   desc       Effect descriptor
 * @param[in]        context    Application context
 */
void RampPluginFactory::describeInContext( OFX::ImageEffectDescriptor& desc,
                                                  OFX::EContext context )
{
    describeGeneratorParamsInContext( desc, context );

    OFX::ChoiceParamDescriptor* direction = desc.defineChoiceParam( kRampDirection );
    direction->appendOption( "horizontal", "Horizontal" );
    direction->appendOption( "vertical", "Vertical" );
    direction->setLabel( "Ramp Direction" );
    direction->setHint( "Select the ramp direction." );

    OFX::BooleanParamDescriptor* color = desc.defineBooleanParam( kRampColor );
    color->setDefault( false );
    color->setLabel( "Color Ramp" );
    color->setHint( "Enable the R/G/B/Gray ramp." );
}

/**
 * @brief Function called to describe the plugin controls and features.
 * @param[in, out]   desc       Effect descriptor
 * @param[in]        context    Application context
 */
void DPXWriterPluginFactory::describeInContext( OFX::ImageEffectDescriptor& desc,
                                                OFX::EContext               context )
{
	OFX::ClipDescriptor* srcClip = desc.defineClip( kOfxImageEffectSimpleSourceClipName );
	srcClip->addSupportedComponent( OFX::ePixelComponentRGBA );
	srcClip->addSupportedComponent( OFX::ePixelComponentRGB );
	srcClip->addSupportedComponent( OFX::ePixelComponentAlpha );
	srcClip->setSupportsTiles( kSupportTiles );

	OFX::ClipDescriptor* dstClip = desc.defineClip( kOfxImageEffectOutputClipName );
	dstClip->addSupportedComponent( OFX::ePixelComponentRGBA );
	dstClip->addSupportedComponent( OFX::ePixelComponentRGB );
	dstClip->addSupportedComponent( OFX::ePixelComponentAlpha );
	dstClip->setSupportsTiles( kSupportTiles );

	// Controls
	OFX::StringParamDescriptor* filename = desc.defineStringParam( kParamWriterFilename );
	filename->setLabel( "Filename" );
	filename->setStringType( OFX::eStringTypeFilePath );
	filename->setCacheInvalidation( OFX::eCacheInvalidateValueAll );
	desc.addClipPreferencesSlaveParam( *filename );

	OFX::ChoiceParamDescriptor* componentsType = desc.defineChoiceParam( kParamComponentsType );
	componentsType->setLabel( "Components type" );
	componentsType->appendOption( "rgb" );
	componentsType->appendOption( "rgba" );
	componentsType->appendOption( "abgr" );
	componentsType->setCacheInvalidation( OFX::eCacheInvalidateValueAll );
	componentsType->setDefault( 1 );

	OFX::ChoiceParamDescriptor* bitDepth = desc.defineChoiceParam( kParamWriterBitDepth );
	bitDepth->setLabel( "Bit depth" );
	bitDepth->appendOption( kTuttlePluginBitDepth8 );
	bitDepth->appendOption( kTuttlePluginBitDepth10 );
	bitDepth->appendOption( kTuttlePluginBitDepth12 );
	bitDepth->appendOption( kTuttlePluginBitDepth16 );
	bitDepth->setCacheInvalidation( OFX::eCacheInvalidateValueAll );
	bitDepth->setDefault( 3 );

	OFX::BooleanParamDescriptor* compressed = desc.defineBooleanParam( kParamCompressed );
	compressed->setLabel( "Remove unused bits (bit streaming)" );
	compressed->setCacheInvalidation( OFX::eCacheInvalidateValueAll );
	compressed->setDefault( false );

	describeWriterParamsInContext( desc, context );
}

void
CImgFilterPluginHelperBase::describeInContextEnd(OFX::ImageEffectDescriptor &desc,
                                                 OFX::ContextEnum /*context*/,
                                                 OFX::PageParamDescriptor* page)
{
    ofxsPremultDescribeParams(desc, page);
    ofxsMaskMixDescribeParams(desc, page);

    {
        OFX::BooleanParamDescriptor* param = desc.defineBooleanParam(kParamPremultChanged);
        param->setDefault(false);
        param->setIsSecret(true);
        param->setAnimates(false);
        param->setEvaluateOnChange(false);
        if (page) {
            page->addChild(*param);
        }
    }
}

/**
 * @brief Function called to describe the plugin controls and features.
 * @param[in, out]   desc       Effect descriptor
 * @param[in]        context    Application context
 */
void Jpeg2000WriterPluginFactory::describeInContext( OFX::ImageEffectDescriptor &desc,
						     OFX::EContext context )
{
    OFX::ClipDescriptor *srcClip = desc.defineClip( kOfxImageEffectSimpleSourceClipName );
    srcClip->addSupportedComponent( OFX::ePixelComponentRGBA );
    srcClip->addSupportedComponent( OFX::ePixelComponentRGB );
    srcClip->addSupportedComponent( OFX::ePixelComponentAlpha );
    srcClip->setSupportsTiles( kSupportTiles );

    OFX::ClipDescriptor *dstClip = desc.defineClip( kOfxImageEffectOutputClipName );
    dstClip->addSupportedComponent( OFX::ePixelComponentRGBA );
    dstClip->addSupportedComponent( OFX::ePixelComponentRGB );
    dstClip->addSupportedComponent( OFX::ePixelComponentAlpha );
    dstClip->setSupportsTiles( kSupportTiles );

	describeWriterParamsInContext( desc, context );

	OFX::ChoiceParamDescriptor* bitDepth = static_cast<OFX::ChoiceParamDescriptor*>( desc.getParamDescriptor( kTuttlePluginBitDepth ) );
	bitDepth->resetOptions();
	bitDepth->appendOption( kTuttlePluginBitDepth8 );
	bitDepth->appendOption( kTuttlePluginBitDepth12 );
	bitDepth->appendOption( kTuttlePluginBitDepth16 );
#ifndef TUTTLE_PRODUCTION
	bitDepth->appendOption( kTuttlePluginBitDepth32 );
#endif
	bitDepth->setCacheInvalidation( OFX::eCacheInvalidateValueAll );
	bitDepth->setDefault( eTuttlePluginBitDepth8 );

    OFX::BooleanParamDescriptor* lossless = desc.defineBooleanParam( kParamLossless );
    lossless->setLabel( "lossless" );
    lossless->setHint("When no cinema profile is selected, set compression to lossless.");
    lossless->setDefault( false );

    OFX::ChoiceParamDescriptor* cineProfil = desc.defineChoiceParam( kParamCinemaProfil );
    cineProfil->appendOption( kParamCinemaProfilNoDigit );
    cineProfil->appendOption( kParamCinemaProfil2k24fps );
    cineProfil->appendOption( kParamCinemaProfil2k48fps );
    cineProfil->appendOption( kParamCinemaProfil4k24fps );
    cineProfil->setDefault( 0 );
}

/**
 * @brief Function called to describe the plugin controls and features.
 * @param[in, out]   desc       Effect descriptor
 * @param[in]        context    Application context
 */
void ComponentPluginFactory::describeInContext( OFX::ImageEffectDescriptor& desc,
                                                  OFX::EContext context )
{
	OFX::ClipDescriptor* srcClip = desc.defineClip( kOfxImageEffectSimpleSourceClipName );
	srcClip->addSupportedComponent( OFX::ePixelComponentRGBA );
	srcClip->addSupportedComponent( OFX::ePixelComponentRGB );
	srcClip->addSupportedComponent( OFX::ePixelComponentAlpha );
	srcClip->setSupportsTiles( kSupportTiles );

	// Create the mandated output clip
	OFX::ClipDescriptor* dstClip = desc.defineClip( kOfxImageEffectOutputClipName );
	dstClip->addSupportedComponent( OFX::ePixelComponentRGBA );
	dstClip->addSupportedComponent( OFX::ePixelComponentRGB );
	dstClip->addSupportedComponent( OFX::ePixelComponentAlpha );
	dstClip->setSupportsTiles( kSupportTiles );

	OFX::ChoiceParamDescriptor* outTo = desc.defineChoiceParam( kParamTo );
	outTo->setLabel( kParamToLabel );
	outTo->appendOption( kConvertToGray );
	outTo->appendOption( kConvertToRGB );
	outTo->appendOption( kConvertToRGBA );
	outTo->setDefault( eConvertToRGBA );
	
	OFX::ChoiceParamDescriptor* outGray = desc.defineChoiceParam( kParamToGray );
	outGray->setLabel( kParamToGrayLabel );
	outGray->appendOption( kConvertToGrayMean );
	outGray->appendOption( kConvertToGrayRec601 );
	outGray->appendOption( kConvertToGrayRec709 );
	outGray->appendOption( kConvertToGraySelectRed );
	outGray->appendOption( kConvertToGraySelectGreen );
	outGray->appendOption( kConvertToGraySelectBlue );
	outGray->appendOption( kConvertToGraySelectAlpha );
	outGray->setDefault( 3 ); // terry::color::components::eConvertToGrayRec709

	OFX::BooleanParamDescriptor* outPremult = desc.defineBooleanParam( kParamPremutliplied );
	outPremult->setLabel( kParamPremutlipliedLabel );
	outPremult->setDefault( false );
}

/**
 * @brief Function called to describe the plugin controls and features.
 * @param[in, out]   desc       Effect descriptor
 * @param[in]        context    Application context
 */
void SobelPluginFactory::describeInContext(OFX::ImageEffectDescriptor& desc, OFX::EContext context)
{
    OFX::ClipDescriptor* srcClip = desc.defineClip(kOfxImageEffectSimpleSourceClipName);
    srcClip->addSupportedComponent(OFX::ePixelComponentRGBA);
    srcClip->addSupportedComponent(OFX::ePixelComponentRGB);
    srcClip->addSupportedComponent(OFX::ePixelComponentAlpha);
    srcClip->setSupportsTiles(kSupportTiles);

    OFX::ClipDescriptor* dstClip = desc.defineClip(kOfxImageEffectOutputClipName);
    dstClip->addSupportedComponent(OFX::ePixelComponentRGBA);
    dstClip->addSupportedComponent(OFX::ePixelComponentRGB);
    dstClip->setSupportsTiles(kSupportTiles);

    OFX::Double2DParamDescriptor* size = desc.defineDouble2DParam(kParamSize);
    size->setLabel("Size");
    size->setDefault(1.0, 1.0);
    size->setRange(0.0, 0.0, std::numeric_limits<double>::max(), std::numeric_limits<double>::max());
    size->setDisplayRange(0, 0, 10, 10);
    size->setDoubleType(OFX::eDoubleTypeScale);

    OFX::GroupParamDescriptor* advanced = desc.defineGroupParam(kParamGroupAdvanced);
    advanced->setLabel("Advanced");

    OFX::BooleanParamDescriptor* unidimensional = desc.defineBooleanParam(kParamUnidimensional);
    unidimensional->setLabel("Unidimensional");
    unidimensional->setHint("Instead of using a square convolution matrix, use 1D kernels.");
    unidimensional->setDefault(false);
    unidimensional->setParent(advanced);

    OFX::BooleanParamDescriptor* reverseKernel = desc.defineBooleanParam(kParamReverseKernel);
    reverseKernel->setLabel("Reverse");
    reverseKernel->setHint("Reverse the kernel (convolution or correlation).");
    reverseKernel->setDefault(false);
    reverseKernel->setParent(advanced);

    OFX::BooleanParamDescriptor* normalizedKernel = desc.defineBooleanParam(kParamNormalizedKernel);
    normalizedKernel->setLabel("Normalized kernel");
    normalizedKernel->setHint("Use a normalized kernel to compute the gradient.");
    normalizedKernel->setDefault(true);
    normalizedKernel->setParent(advanced);

    OFX::DoubleParamDescriptor* kernelEpsilon = desc.defineDoubleParam(kParamKernelEpsilon);
    kernelEpsilon->setLabel("Kernel espilon value");
    kernelEpsilon->setHint("Threshold at which we no longer consider the values of the function.");
    kernelEpsilon->setDefault(0.01);
    kernelEpsilon->setRange(std::numeric_limits<double>::epsilon(), 1);
    kernelEpsilon->setDisplayRange(0, 0.01);
    kernelEpsilon->setParent(advanced);

    OFX::ChoiceParamDescriptor* pass = desc.defineChoiceParam(kParamPass);
    pass->setLabel("Pass");
    pass->setHint("The sobel filter is computed using a 2D separable filter. So it consists in 2 passes.\n"
                  "By default we compute the 2 passes, but with this option you can separate each pass.");
    pass->appendOption(kParamPassFull);
    pass->appendOption(kParamPass1);
    pass->appendOption(kParamPass2);
    pass->setDefault(0);
    pass->setParent(advanced);

    OFX::ChoiceParamDescriptor* border = desc.defineChoiceParam(kParamBorder);
    border->setLabel("Gradient border");
    border->setHint("Border method for gradient computation.");
    border->appendOption(kParamBorderMirror);
    border->appendOption(kParamBorderConstant);
    border->appendOption(kParamBorderBlack);
    border->appendOption(kParamBorderPadded);

    OFX::BooleanParamDescriptor* computeNorm = desc.defineBooleanParam(kParamComputeGradientNorm);
    computeNorm->setLabel("Compute norm");
    computeNorm->setHint("To disable the norm computation, if you don't need it.");
    computeNorm->setDefault(true);

    OFX::BooleanParamDescriptor* normManhattan = desc.defineBooleanParam(kParamGradientNormManhattan);
    normManhattan->setLabel("Use the manhattan norm");
    normManhattan->setHint("Use manhattan norm instead of standard one.");
    normManhattan->setDefault(false);

    OFX::BooleanParamDescriptor* computeGradientDirection = desc.defineBooleanParam(kParamComputeGradientDirection);
    computeGradientDirection->setLabel("Gradient direction");
    computeGradientDirection->setHint("To disable the gradient direction computation, if you don't need it.");
    computeGradientDirection->setDefault(false);

    OFX::BooleanParamDescriptor* gradientDirectionAbs = desc.defineBooleanParam(kParamGradientDirectionAbs);
    gradientDirectionAbs->setLabel("Angle between 0 and PI");
    gradientDirectionAbs->setHint("Limit gradient direction between 0 and PI.");
    gradientDirectionAbs->setDefault(true);

    OFX::PushButtonParamDescriptor* infosButton = desc.definePushButtonParam(kParamInfos);
    infosButton->setLabel("Infos");

    OFX::ChoiceParamDescriptor* outputComponent = desc.defineChoiceParam(kParamOutputComponent);
    outputComponent->setLabel("Output component");
    outputComponent->appendOption(OFX::getImageEffectHostDescription()->supportsPixelComponent(OFX::ePixelComponentRGB)
                                      ? kParamOutputComponentRGB
                                      : "---");
//.........这里部分代码省略.........

/**
 * @brief Function called to describe the plugin controls and features.
 * @param[in, out]   desc       Effect descriptor
 * @param[in]        context    Application context
 */
void NormalizePluginFactory::describeInContext( OFX::ImageEffectDescriptor& desc,
                                                  OFX::EContext context )
{
	OFX::ClipDescriptor* srcClip = desc.defineClip( kOfxImageEffectSimpleSourceClipName );
	srcClip->addSupportedComponent( OFX::ePixelComponentRGBA );
	srcClip->addSupportedComponent( OFX::ePixelComponentRGB );
	srcClip->addSupportedComponent( OFX::ePixelComponentAlpha );
	srcClip->setSupportsTiles( kSupportTiles );

	// Create the mandated output clip
	OFX::ClipDescriptor* dstClip = desc.defineClip( kOfxImageEffectOutputClipName );
	dstClip->addSupportedComponent( OFX::ePixelComponentRGBA );
	dstClip->addSupportedComponent( OFX::ePixelComponentRGB );
	dstClip->addSupportedComponent( OFX::ePixelComponentAlpha );
	dstClip->setSupportsTiles( kSupportTiles );

	OFX::ChoiceParamDescriptor* mode = desc.defineChoiceParam( kParamMode );
	mode->setLabel( "Input" );
	mode->appendOption( kParamModeAnalyse );
	mode->appendOption( kParamModeCustom );

	OFX::ChoiceParamDescriptor* analyse = desc.defineChoiceParam( kParamAnalyseMode );
	analyse->setLabel( "Analyse" );
	analyse->appendOption( kParamAnalysePerChannel );
	analyse->appendOption( kParamAnalyseLuminosity );
	analyse->appendOption( kParamAnalyseR );
	analyse->appendOption( kParamAnalyseG );
	analyse->appendOption( kParamAnalyseB );
	analyse->appendOption( kParamAnalyseA );

	OFX::PushButtonParamDescriptor* analyseNow = desc.definePushButtonParam( kParamAnalyseNow );
	analyseNow->setLabel( "Analyse" );

	OFX::GroupParamDescriptor* srcGroup = desc.defineGroupParam( kParamSrcGroup );
	srcGroup->setLabel( "Source" );

	OFX::RGBAParamDescriptor* srcMinColor = desc.defineRGBAParam( kParamSrcCustomColorMin );
	srcMinColor->setLabel( "Min" );
	srcMinColor->setDefault( 0.0, 0.0, 0.0, 0.0 );
	srcMinColor->setParent( srcGroup );

	OFX::RGBAParamDescriptor* srcMaxColor = desc.defineRGBAParam( kParamSrcCustomColorMax );
	srcMaxColor->setLabel( "Max" );
	srcMaxColor->setDefault( 1.0, 1.0, 1.0, 1.0 );
	srcMaxColor->setParent( srcGroup );

	OFX::GroupParamDescriptor* dstGroup = desc.defineGroupParam( kParamDstGroup );
	dstGroup->setLabel( "Destination" );

	OFX::RGBAParamDescriptor* dstMinColor = desc.defineRGBAParam( kParamDstCustomColorMin );
	dstMinColor->setLabel( "Min" );
	dstMinColor->setDefault( 0.0, 0.0, 0.0, 0.0 );
	dstMinColor->setParent( dstGroup );

	OFX::RGBAParamDescriptor* dstMaxColor = desc.defineRGBAParam( kParamDstCustomColorMax );
	dstMaxColor->setLabel( "Max" );
	dstMaxColor->setDefault( 1.0, 1.0, 1.0, 1.0 );
	dstMaxColor->setParent( dstGroup );

	OFX::GroupParamDescriptor* processGroup = desc.defineGroupParam( kParamProcessGroup );
	processGroup->setLabel( "Process" );

	OFX::BooleanParamDescriptor* processR = desc.defineBooleanParam( kParamProcessR );
	processR->setLabel( "R" );
	processR->setDefault( true );
	processR->setParent( processGroup );

	OFX::BooleanParamDescriptor* processG = desc.defineBooleanParam( kParamProcessG );
	processG->setLabel( "G" );
	processG->setDefault( true );
	processG->setParent( processGroup );

	OFX::BooleanParamDescriptor* processB = desc.defineBooleanParam( kParamProcessB );
	processB->setLabel( "B" );
	processB->setDefault( true );
	processB->setParent( processGroup );

	OFX::BooleanParamDescriptor* processA = desc.defineBooleanParam( kParamProcessA );
	processA->setLabel( "A" );
	processA->setDefault( true );
	processA->setParent( processGroup );
}

OFX::PageParamDescriptor*
CImgFilterPluginHelperBase::describeInContextBegin(bool sourceIsOptional,
                                                   OFX::ImageEffectDescriptor &desc,
                                                   OFX::ContextEnum context,
                                                   bool supportsRGBA,
                                                   bool supportsRGB,
                                                   bool supportsXY,
                                                   bool supportsAlpha,
                                                   bool supportsTiles,
                                                   bool processRGB,
                                                   bool processAlpha,
                                                   bool processIsSecret)
{

#ifdef OFX_EXTENSIONS_NATRON
    desc.setChannelSelector(OFX::ePixelComponentNone); // we have our own channel selector
#endif

    OFX::ClipDescriptor *srcClip = desc.defineClip(kOfxImageEffectSimpleSourceClipName);
    if (supportsRGBA) {
        srcClip->addSupportedComponent(OFX::ePixelComponentRGBA);
    }
    if (supportsRGB) {
        srcClip->addSupportedComponent(OFX::ePixelComponentRGB);
    }
    if (supportsXY) {
        srcClip->addSupportedComponent(OFX::ePixelComponentXY);
    }
    if (supportsAlpha) {
        srcClip->addSupportedComponent(OFX::ePixelComponentAlpha);
    }
    srcClip->setTemporalClipAccess(false);
    srcClip->setSupportsTiles(supportsTiles);
    srcClip->setIsMask(false);
    if (context == OFX::eContextGeneral && sourceIsOptional) {
        srcClip->setOptional(sourceIsOptional);
    }

    OFX::ClipDescriptor *dstClip = desc.defineClip(kOfxImageEffectOutputClipName);
    if (supportsRGBA) {
        dstClip->addSupportedComponent(OFX::ePixelComponentRGBA);
    }
    if (supportsRGB) {
        dstClip->addSupportedComponent(OFX::ePixelComponentRGB);
    }
    if (supportsXY) {
        dstClip->addSupportedComponent(OFX::ePixelComponentXY);
    }
    if (supportsAlpha) {
        dstClip->addSupportedComponent(OFX::ePixelComponentAlpha);
    }
    dstClip->setSupportsTiles(supportsTiles);

    OFX::ClipDescriptor *maskClip = (context == OFX::eContextPaint) ? desc.defineClip("Brush") : desc.defineClip("Mask");
    maskClip->addSupportedComponent(OFX::ePixelComponentAlpha);
    maskClip->setTemporalClipAccess(false);
    if (context != OFX::eContextPaint) {
        maskClip->setOptional(true);
    }
    maskClip->setSupportsTiles(supportsTiles);
    maskClip->setIsMask(true);

    // create the params
    OFX::PageParamDescriptor *page = desc.definePageParam("Controls");

    {
        OFX::BooleanParamDescriptor* param = desc.defineBooleanParam(kNatronOfxParamProcessR);
        param->setLabel(kNatronOfxParamProcessRLabel);
        param->setHint(kNatronOfxParamProcessRHint);
        param->setDefault(processRGB);
        param->setIsSecret(processIsSecret);
        param->setLayoutHint(OFX::eLayoutHintNoNewLine);
        if (page) {
            page->addChild(*param);
        }
    }
    {
        OFX::BooleanParamDescriptor* param = desc.defineBooleanParam(kNatronOfxParamProcessG);
        param->setLabel(kNatronOfxParamProcessGLabel);
        param->setHint(kNatronOfxParamProcessGHint);
        param->setDefault(processRGB);
        param->setIsSecret(processIsSecret);
        param->setLayoutHint(OFX::eLayoutHintNoNewLine);
        if (page) {
            page->addChild(*param);
        }
    }
    {
        OFX::BooleanParamDescriptor* param = desc.defineBooleanParam(kNatronOfxParamProcessB);
        param->setLabel(kNatronOfxParamProcessBLabel);
        param->setHint(kNatronOfxParamProcessBHint);
        param->setDefault(processRGB);
        param->setIsSecret(processIsSecret);
        param->setLayoutHint(OFX::eLayoutHintNoNewLine);
        if (page) {
            page->addChild(*param);
        }
    }
    {
        OFX::BooleanParamDescriptor* param = desc.defineBooleanParam(kNatronOfxParamProcessA);
//.........这里部分代码省略.........

void describeWriterParamsInContext( OFX::ImageEffectDescriptor& desc,
				    OFX::EContext               context )
{
	OFX::StringParamDescriptor* filename = desc.defineStringParam( kTuttlePluginFilename );
	filename->setLabel( kTuttlePluginFilenameLabel );
	filename->setStringType( OFX::eStringTypeFilePath );
	filename->setCacheInvalidation( OFX::eCacheInvalidateValueAll );
	// the file doesn't need to exist, the writer will create it!
	filename->setFilePathExists(false);
	desc.addClipPreferencesSlaveParam( *filename );

	OFX::ChoiceParamDescriptor* channel = desc.defineChoiceParam( kTuttlePluginChannel );
	channel->setLabel( kTuttlePluginChannelLabel );
	channel->appendOption( kTuttlePluginChannelAuto );
	channel->appendOption( kTuttlePluginChannelGray );
	channel->appendOption( kTuttlePluginChannelRGB );
	channel->appendOption( kTuttlePluginChannelRGBA );
	channel->setDefault( 0 );

	OFX::ChoiceParamDescriptor* bitDepth = desc.defineChoiceParam( kTuttlePluginBitDepth );
	bitDepth->setLabel( kTuttlePluginBitDepthLabel );
	bitDepth->appendOption( kTuttlePluginBitDepth8 );
	bitDepth->appendOption( kTuttlePluginBitDepth16 );
	bitDepth->setDefault( 0 );
	
	OFX::BooleanParamDescriptor* premult = desc.defineBooleanParam( kParamPremultiplied );
	premult->setLabel( "Premultiplied" );
	premult->setDefault( false );
	
	OFX::ChoiceParamDescriptor* existingFile = desc.defineChoiceParam( kParamWriterExistingFile );
	existingFile->setLabel( "Existing File" );
	existingFile->appendOption( kParamWriterExistingFile_overwrite );
	existingFile->appendOption( kParamWriterExistingFile_error );
	if( OFX::getImageEffectHostDescription()->hostName == "TuttleOfx" )
	{
		// Only Tuttle is able to do that, because we disable the computation
		// using the IsIdentity Action. This is not in the OpenFX standard.
		existingFile->appendOption( kParamWriterExistingFile_skip );
	}
	//existingFile->appendOption( kParamWriterExistingFile_reader ); // TODO: not implemented yet.
	existingFile->setDefault( eParamWriterExistingFile_overwrite );

	OFX::BooleanParamDescriptor* copyToOutput = desc.defineBooleanParam( kParamWriterCopyToOutput );
	copyToOutput->setLabel( "Copy buffer to output" );
	copyToOutput->setHint( "This is only useful if you connect nodes to the output clip of the writer." );
	copyToOutput->setDefault( false );

	OFX::PushButtonParamDescriptor* render = desc.definePushButtonParam( kParamWriterRender );
	render->setLabels( "Render", "Render", "Render step" );
	render->setHint("Force render (writing)");

	OFX::BooleanParamDescriptor* renderAlways = desc.defineBooleanParam( kParamWriterRenderAlways );
	renderAlways->setLabel( "Render always" );
	renderAlways->setHint( "This is only useful as a workaround for GUI applications." );
	renderAlways->setDefault( true ); // because tuttle is not declared as a background renderer

	OFX::IntParamDescriptor* forceNewRender = desc.defineIntParam( kParamWriterForceNewRender );
	forceNewRender->setLabel( "Force new render" );
	forceNewRender->setHint( "This is only useful as a workaround for GUI applications." );
	forceNewRender->setEnabled( false );
	forceNewRender->setIsSecret( true );
	forceNewRender->setIsPersistant( false );
	forceNewRender->setAnimates( false );
	forceNewRender->setCacheInvalidation( OFX::eCacheInvalidateValueAll );
	forceNewRender->setEvaluateOnChange( true );
	forceNewRender->setDefault( 0 );
}

/**
 * @brief Function called to describe the plugin controls and features.
 * @param[in, out]   desc       Effect descriptor
 * @param[in]        context    Application context
 */
void TurboJpegWriterPluginFactory::describeInContext( OFX::ImageEffectDescriptor& desc,
                                                  OFX::EContext context )
{
	OFX::ClipDescriptor* srcClip = desc.defineClip( kOfxImageEffectSimpleSourceClipName );
	srcClip->addSupportedComponent( OFX::ePixelComponentRGBA );
	srcClip->addSupportedComponent( OFX::ePixelComponentRGB );
	srcClip->addSupportedComponent( OFX::ePixelComponentAlpha );
	srcClip->setSupportsTiles( kSupportTiles );

	// Create the mandated output clip
	OFX::ClipDescriptor* dstClip = desc.defineClip( kOfxImageEffectOutputClipName );
	dstClip->addSupportedComponent( OFX::ePixelComponentRGBA );
	dstClip->addSupportedComponent( OFX::ePixelComponentRGB );
	dstClip->addSupportedComponent( OFX::ePixelComponentAlpha );
	dstClip->setSupportsTiles( kSupportTiles );
	
	// Controls
	describeWriterParamsInContext( desc, context );
	
	OFX::ChoiceParamDescriptor* channel = static_cast<OFX::ChoiceParamDescriptor*>( desc.getParamDescriptor( kTuttlePluginChannel ) );
	channel->resetOptions();
	channel->appendOption( kTuttlePluginChannelRGB );
	channel->setDefault( 0 );
	channel->setEnabled( false );
	
	OFX::ChoiceParamDescriptor* bitDepth = static_cast<OFX::ChoiceParamDescriptor*>( desc.getParamDescriptor( kTuttlePluginBitDepth ) );
	bitDepth->resetOptions();
	bitDepth->appendOption( kTuttlePluginBitDepth8 );
	bitDepth->setDefault( eTuttlePluginBitDepth8 );
	bitDepth->setEnabled( false );
	
	OFX::BooleanParamDescriptor* premult = static_cast<OFX::BooleanParamDescriptor*>( desc.getParamDescriptor( kParamPremultiplied ) );
	premult->setDefault( true );
	
	OFX::IntParamDescriptor* quality = desc.defineIntParam( kParamQuality );
	quality->setLabel( "Quality" );
	quality->setRange( 0, 100 );
	quality->setDisplayRange( 0, 100 );
	quality->setDefault( 80 );

	
	OFX::ChoiceParamDescriptor* subsampling = desc.defineChoiceParam( kParamSubsampling );
	subsampling->setLabel( kParamSubsamplingLabel );
	subsampling->setHint( kParamSubsamplingHint );
	subsampling->appendOption( kTurboJpegSubsampling444 );
	subsampling->appendOption( kTurboJpegSubsampling422 );
	subsampling->appendOption( kTurboJpegSubsampling420 );
	subsampling->appendOption( kTurboJpegSubsamplingGray );
	subsampling->appendOption( kTurboJpegSubsampling440 );
	subsampling->setDefault( eTurboJpegSubsampling420 );
	
	OFX::ChoiceParamDescriptor* optimization = desc.defineChoiceParam( kParamOptimization );
	optimization->setLabel( kParamOptimizationLabel );
	optimization->setHint( kParamOptimizationHint );
	optimization->appendOption( kTurboJpegOptimizationNone );
	optimization->appendOption( kTurboJpegOptimizationMMX );
	optimization->appendOption( kTurboJpegOptimizationSSE );
	optimization->appendOption( kTurboJpegOptimizationSSE2 );
	optimization->appendOption( kTurboJpegOptimizationSSE3 );
	optimization->setDefault( eTurboJpegOptimizationSSE3 );
}

/**
 * @brief Function called to describe the plugin controls and features.
 * @param[in, out]   desc       Effect descriptor
 * @param[in]        context    Application context
 */
void HistogramPluginFactory::describeInContext( OFX::ImageEffectDescriptor& desc,OFX::EContext context )
{
	
	OFX::ClipDescriptor* srcClip = desc.defineClip( kOfxImageEffectSimpleSourceClipName );
	srcClip->addSupportedComponent( OFX::ePixelComponentRGBA );
	srcClip->addSupportedComponent( OFX::ePixelComponentRGB );
	srcClip->addSupportedComponent( OFX::ePixelComponentAlpha );
	srcClip->setSupportsTiles( kSupportTiles );

	OFX::ClipDescriptor* dstClip = desc.defineClip( kOfxImageEffectOutputClipName );
	dstClip->addSupportedComponent( OFX::ePixelComponentRGBA );
	dstClip->addSupportedComponent( OFX::ePixelComponentRGB );
	dstClip->addSupportedComponent( OFX::ePixelComponentAlpha );
	dstClip->setSupportsTiles( kSupportTiles );

	//global display
	OFX::BooleanParamDescriptor* boolGLOBAL = desc.defineBooleanParam(kGlobalDisplay);
	boolGLOBAL->setHint("Display global overlay on screen.");
	boolGLOBAL->setDefault(true);
	
    // RGB / HSL
	{
		//Group Param (RGB & HSL)
		OFX::GroupParamDescriptor *groupRGB = desc.defineGroupParam(kGroupRGB);
		groupRGB->setLabel(kGroupRGBLabel);
		OFX::GroupParamDescriptor *groupHSL = desc.defineGroupParam(kGroupHSL);
		groupHSL->setLabel(kGroupHSLLabel);

		//Channels checkboxes (RGB)
		OFX::BooleanParamDescriptor* boolR = desc.defineBooleanParam(kBoolRed);
		boolR->setDefault(true);							//red channel is not selected by default
		boolR->setHint("Activate Red channel");
		boolR->setLayoutHint( OFX::eLayoutHintNoNewLine ); //line is not finished
		boolR->setParent(groupRGB);
		//red multiplier
		OFX::DoubleParamDescriptor* redMultiplier = desc.defineDoubleParam(kMultiplierRed);
		redMultiplier->setLabel(kMultiplierLabel);
		redMultiplier->setHint("Determinate curve from selection precision.");
		redMultiplier->setRange(1, 1000);
		redMultiplier->setDisplayRange(0,5);
		redMultiplier->setDefault(1);
		redMultiplier->setParent(groupRGB);
		
		OFX::BooleanParamDescriptor* boolG = desc.defineBooleanParam(kBoolGreen);
		boolG->setDefault(true);						//green channel is not selected by default
		boolG->setHint("Activate Green channel");
		boolG->setLayoutHint( OFX::eLayoutHintNoNewLine ); //line is not finished
		boolG->setParent(groupRGB);
		//green multiplier
		OFX::DoubleParamDescriptor* greenMultiplier = desc.defineDoubleParam(kMultiplierGreen);
		greenMultiplier->setLabel(kMultiplierLabel);
		greenMultiplier->setHint("Determinate curve from selection precision.");
		greenMultiplier->setRange(1, 1000);
		greenMultiplier->setDisplayRange(0,5);
		greenMultiplier->setDefault(1);
		greenMultiplier->setParent(groupRGB);
		
		OFX::BooleanParamDescriptor* boolB = desc.defineBooleanParam(kBoolBlue);
		boolB->setHint("Activate Blue channel");
		boolB->setLayoutHint( OFX::eLayoutHintNoNewLine ); //line is not finished
		boolB->setDefault(true);						   //blue channel is not selected by default
		boolB->setParent(groupRGB);
		//blue multiplier
		OFX::DoubleParamDescriptor* blueMultiplier = desc.defineDoubleParam(kMultiplierBlue);
		blueMultiplier->setLabel(kMultiplierLabel);
		blueMultiplier->setHint("Determinate curve from selection precision.");
		blueMultiplier->setRange(1, 1000);
		blueMultiplier->setDisplayRange(0,5);
		blueMultiplier->setDefault(1);
		blueMultiplier->setParent(groupRGB);
		
		//Channels check box (HSL)
		OFX::BooleanParamDescriptor* boolH = desc.defineBooleanParam(kBoolHue);
		boolH->setDefault(true);
		boolH->setHint("Activate Hue channel");
		boolH->setLayoutHint( OFX::eLayoutHintNoNewLine ); //line is not finished
		boolH->setParent(groupHSL);
		//Hue multiplier
		OFX::DoubleParamDescriptor* hueMultiplier = desc.defineDoubleParam(kMultiplierHue);
		hueMultiplier->setLabel(kMultiplierLabel);
		hueMultiplier->setHint("Determinate curve from selection precision.");
		hueMultiplier->setRange(1, 1000);
		hueMultiplier->setDisplayRange(0,5);
		hueMultiplier->setDefault(1);
		hueMultiplier->setParent(groupHSL);
		
		OFX::BooleanParamDescriptor* boolS = desc.defineBooleanParam(kBoolSaturation);
		boolS->setDefault(true);
		boolS->setHint("Activate Saturation channel");
		boolS->setLayoutHint( OFX::eLayoutHintNoNewLine ); //line is not finished
		boolS->setParent(groupHSL);
		//Saturation multiplier
		OFX::DoubleParamDescriptor* saturationMultiplier = desc.defineDoubleParam(kMultiplierSaturation);
		saturationMultiplier->setLabel(kMultiplierLabel);
		saturationMultiplier->setHint("Determinate curve from selection precision.");
//.........这里部分代码省略.........

/**
 * @brief Function called to describe the plugin controls and features.
 * @param[in, out]   desc       Effect descriptor
 * @param[in]        context    Application context
 */
void ResizePluginFactory::describeInContext(OFX::ImageEffectDescriptor& desc, OFX::EContext context)
{
    OFX::ClipDescriptor* srcClip = desc.defineClip(kOfxImageEffectSimpleSourceClipName);
    srcClip->addSupportedComponent(OFX::ePixelComponentRGBA);
    srcClip->addSupportedComponent(OFX::ePixelComponentRGB);
    srcClip->addSupportedComponent(OFX::ePixelComponentAlpha);
    srcClip->setSupportsTiles(kSupportTiles);

    // Create the mandated output clip
    OFX::ClipDescriptor* dstClip = desc.defineClip(kOfxImageEffectOutputClipName);
    dstClip->addSupportedComponent(OFX::ePixelComponentRGBA);
    dstClip->addSupportedComponent(OFX::ePixelComponentRGB);
    dstClip->addSupportedComponent(OFX::ePixelComponentAlpha);
    dstClip->setSupportsTiles(kSupportTiles);

    OFX::ChoiceParamDescriptor* method = desc.defineChoiceParam(kParamMode);
    method->setLabel("Mode");
    method->appendOption(kParamModeFormat);
    method->appendOption(kParamModeSize);
    method->appendOption(kParamModeScale);
    method->setDefault(eParamModeFormat);

    OFX::ChoiceParamDescriptor* format = desc.defineChoiceParam(kParamFormat);
    format->setLabel("Format");
    format->appendOption(kParamFormatPCVideo, kParamFormatPCVideoLabel);
    format->appendOption(kParamFormatNTSC, kParamFormatNTSCLabel);
    format->appendOption(kParamFormatPAL, kParamFormatPALLabel);
    format->appendOption(kParamFormatHD, kParamFormatHDLabel);
    format->appendOption(kParamFormatNTSC169, kParamFormatNTSC169Label);
    format->appendOption(kParamFormatPAL169, kParamFormatPAL169Label);
    format->appendOption(kParamFormat1kSuper35, kParamFormat1kSuper35Label);
    format->appendOption(kParamFormat1kCinemascope, kParamFormat1kCinemascopeLabel);
    format->appendOption(kParamFormat2kSuper35, kParamFormat2kSuper35Label);
    format->appendOption(kParamFormat2kCinemascope, kParamFormat2kCinemascopeLabel);
    format->appendOption(kParamFormat4kSuper35, kParamFormat4kSuper35Label);
    format->appendOption(kParamFormat4kCinemascope, kParamFormat4kCinemascopeLabel);
    format->appendOption(kParamFormatSquare256, kParamFormatSquare256Label);
    format->appendOption(kParamFormatSquare512, kParamFormatSquare512Label);
    format->appendOption(kParamFormatSquare1k, kParamFormatSquare1kLabel);
    format->appendOption(kParamFormatSquare2k, kParamFormatSquare2kLabel);
    format->setDefault(eParamFormat2kCinemascope);

    OFX::Double2DParamDescriptor* scale = desc.defineDouble2DParam(kParamScale);
    scale->setLabel("Scale");
    scale->setDefault(1.0, 1.0);
    scale->setRange(0.01, 0.01, std::numeric_limits<double>::max(), std::numeric_limits<double>::max());
    scale->setDisplayRange(0.1, 0.1, 2.5, 2.5);
    scale->setHint("Scale the input image [0, 0, width*scale, height*scale].");

    OFX::BooleanParamDescriptor* keepRatio = desc.defineBooleanParam(kParamSizeKeepRatio);
    keepRatio->setLabel("Keep ratio");
    keepRatio->setDefault(false);
    keepRatio->setHint("Keep input image ratio.");

    OFX::Int2DParamDescriptor* size = desc.defineInt2DParam(kParamSize);
    size->setLabel("Size");
    size->setDefault(200, 200);
    size->setRange(1, 1, std::numeric_limits<int>::max(), std::numeric_limits<int>::max());
    size->setHint("Set the output size (width, height).");

    OFX::ChoiceParamDescriptor* direction = desc.defineChoiceParam(kParamSizeOrientation);
    direction->setLabel("Orientation");
    direction->appendOption(kParamSizeOrientationX);
    direction->appendOption(kParamSizeOrientationY);
    direction->setDefault(eParamSizeOrientationX);

    OFX::IntParamDescriptor* width = desc.defineIntParam(kParamSizeWidth);
    width->setLabel("Width");
    width->setDefault(200);
    width->setRange(1, std::numeric_limits<int>::max());
    width->setDisplayRange(0, 3000);
    width->setHint("Set the width in pixels and keep the input image ratio.");

    OFX::IntParamDescriptor* height = desc.defineIntParam(kParamSizeHeight);
    height->setLabel("Height");
    height->setDefault(200);
    height->setRange(1, std::numeric_limits<int>::max());
    height->setDisplayRange(0, 3000);
    height->setHint("Set the height in pixels and keep the input image ratio.");

#if(TUTTLE_EXPERIMENTAL)
    OFX::BooleanParamDescriptor* center = desc.defineBooleanParam(kParamCenter);
    center->setLabel("Center resizing");
    center->setDefault(false);
    center->setHint("Resize around the center point.");

    OFX::Double2DParamDescriptor* centerPoint = desc.defineDouble2DParam(kParamCenterPoint);
    centerPoint->setDefault(100, 100);
    centerPoint->setLabel("Center point at");
    centerPoint->setHint("Position of the center point.");
#endif

    // sampler parameters //
    describeSamplerParamsInContext(desc, context);
}