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oak-editor/third_party/openfx/Support/Plugins/Basic/basic.cpp
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#ifdef _WINDOWS
#include <windows.h>
#endif
#ifdef __APPLE__
#include <OpenGL/gl.h>
#else
#include <GL/gl.h>
#endif
#include <stdio.h>
#include "ofxsImageEffect.h"
#include "ofxsMultiThread.h"
#include "../include/ofxsProcessing.H"
////////////////////////////////////////////////////////////////////////////////
// a dumb interact that just draw's a square you can drag
static const OfxPointD kBoxSize = {20, 20};
class BasicInteract : public OFX::OverlayInteract {
protected :
enum StateEnum {
eInActive,
ePoised,
ePicked
};
OfxPointD _position;
StateEnum _state;
public :
BasicInteract(OfxInteractHandle handle, OFX::ImageEffect* /*effect*/)
: OFX::OverlayInteract(handle)
, _state(eInActive)
{
_position.x = 0;
_position.y = 0;
}
// overridden functions from OFX::Interact to do things
virtual bool draw(const OFX::DrawArgs &args);
virtual bool penMotion(const OFX::PenArgs &args);
virtual bool penDown(const OFX::PenArgs &args);
virtual bool penUp(const OFX::PenArgs &args);
};
////////////////////////////////////////////////////////////////////////////////
// rendering routines
template <class T> inline T
Minimum(T a, T b) { return (a < b) ? a : b;}
template <class T> inline T
Absolute(T a) { return (a < 0) ? -a : a;}
template <class T> inline T
Clamp(T v, int min, int max)
{
if(v < T(min)) return T(min);
if(v > T(max)) return T(max);
return v;
}
// Base class for the RGBA and the Alpha processor
class ImageScalerBase : public OFX::ImageProcessor {
protected :
OFX::Image *_srcImg;
OFX::Image *_maskImg;
double _rScale, _gScale, _bScale, _aScale;
bool _doMasking;
public :
/** @brief no arg ctor */
ImageScalerBase(OFX::ImageEffect &instance)
: OFX::ImageProcessor(instance)
, _srcImg(0)
, _maskImg(0)
, _rScale(1)
, _gScale(1)
, _bScale(1)
, _aScale(1)
, _doMasking(false)
{
}
/** @brief set the src image */
void setSrcImg(OFX::Image *v) {_srcImg = v;}
/** @brief set the optional mask image */
void setMaskImg(OFX::Image *v) {_maskImg = v;}
// Are we masking. We can't derive this from the mask image being set as NULL is a valid value for an input image
void doMasking(bool v) {_doMasking = v;}
/** @brief set the scale */
void setScales(float r, float g, float b, float a)
{
_rScale = r;
_gScale = g;
_bScale = b;
_aScale = a;
}
};
// template to do the RGBA processing
template <class PIX, int nComponents, int max>
class ImageScaler : public ImageScalerBase {
public :
// ctor
ImageScaler(OFX::ImageEffect &instance)
: ImageScalerBase(instance)
{}
// and do some processing
void multiThreadProcessImages(OfxRectI procWindow)
{
float scales[4];
scales[0] = nComponents == 1 ? (float)_aScale : (float)_rScale;
scales[1] = (float)_gScale;
scales[2] = (float)_bScale;
scales[3] = (float)_aScale;
float maskScale = 1.0f;
for(int y = procWindow.y1; y < procWindow.y2; y++) {
if(_effect.abort()) break;
PIX *dstPix = (PIX *) _dstImg->getPixelAddress(procWindow.x1, y);
for(int x = procWindow.x1; x < procWindow.x2; x++) {
PIX *srcPix = (PIX *) (_srcImg ? _srcImg->getPixelAddress(x, y) : 0);
// are we doing masking
if(_doMasking) {
// we do, get the pixel from the mask
if(!_maskImg)
maskScale = 1.0f;
else
{
PIX *maskPix = (PIX *) (_maskImg ? _maskImg->getPixelAddress(x, y) : 0);
// figure the scale factor from that pixel
maskScale = maskPix != 0 ? float(*maskPix)/float(max) : 0.0f;
}
}
// do we have a source image to scale up
if(srcPix) {
for(int c = 0; c < nComponents; c++) {
float v;
// scale the component up by the scale factor, modulated by the maskScale
if(maskScale != 1.0f)
v = srcPix[c] * (1.0f + (scales[c] - 1.0f) * maskScale);
else
v = srcPix[c] * scales[c];
if(max == 1) // implies floating point and so no clamping
dstPix[c] = PIX(v);
else // integer based and we need to clamp
dstPix[c] = PIX(Clamp(v, 0, max));
}
}
else {
// no src pixel here, be black and transparent
for(int c = 0; c < nComponents; c++) {
dstPix[c] = 0;
}
}
// increment the dst pixel
dstPix += nComponents;
}
}
}
};
////////////////////////////////////////////////////////////////////////////////
/** @brief The plugin that does our work */
class BasicPlugin : public OFX::ImageEffect {
protected :
// do not need to delete these, the ImageEffect is managing them for us
OFX::Clip *dstClip_;
OFX::Clip *srcClip_;
OFX::Clip *maskClip_;
OFX::DoubleParam *scale_;
OFX::DoubleParam *rScale_;
OFX::DoubleParam *gScale_;
OFX::DoubleParam *bScale_;
OFX::DoubleParam *aScale_;
OFX::BooleanParam *componentScalesEnabled_;
public :
/** @brief ctor */
BasicPlugin(OfxImageEffectHandle handle)
: ImageEffect(handle)
, dstClip_(0)
, srcClip_(0)
, scale_(0)
, rScale_(0)
, gScale_(0)
, bScale_(0)
, aScale_(0)
, componentScalesEnabled_(0)
{
dstClip_ = fetchClip(kOfxImageEffectOutputClipName);
srcClip_ = fetchClip(kOfxImageEffectSimpleSourceClipName);
// name of mask clip depends on the context
maskClip_ = getContext() == OFX::eContextFilter ? NULL : fetchClip(getContext() == OFX::eContextPaint ? "Brush" : "Mask");
scale_ = fetchDoubleParam("scale");
rScale_ = fetchDoubleParam("scaleR");
gScale_ = fetchDoubleParam("scaleG");
bScale_ = fetchDoubleParam("scaleB");
aScale_ = fetchDoubleParam("scaleA");
componentScalesEnabled_ = fetchBooleanParam("scaleComponents");
// set the enabledness of our RGBA sliders
setEnabledness();
}
/* sets the enabledness of the component scale params depending on the type of input image and the state of the scaleComponents param */
void setEnabledness(void);
/* Override the render */
virtual void render(const OFX::RenderArguments &args);
/* override is identity */
virtual bool isIdentity(const OFX::IsIdentityArguments &args, OFX::Clip * &identityClip, double &identityTime);
/* override changedParam */
virtual void changedParam(const OFX::InstanceChangedArgs &args, const std::string &paramName);
/* override changed clip */
virtual void changedClip(const OFX::InstanceChangedArgs &args, const std::string &clipName);
// override the rod call
virtual bool getRegionOfDefinition(const OFX::RegionOfDefinitionArguments &args, OfxRectD &rod);
// override the roi call
virtual void getRegionsOfInterest(const OFX::RegionsOfInterestArguments &args, OFX::RegionOfInterestSetter &rois);
/* set up and run a processor */
void
setupAndProcess(ImageScalerBase &, const OFX::RenderArguments &args);
};
////////////////////////////////////////////////////////////////////////////////
/** @brief render for the filter */
////////////////////////////////////////////////////////////////////////////////
// basic plugin render function, just a skelington to instantiate templates from
/* set up and run a processor */
void
BasicPlugin::setupAndProcess(ImageScalerBase &processor, const OFX::RenderArguments &args)
{
// get a dst image
std::unique_ptr<OFX::Image> dst(dstClip_->fetchImage(args.time));
OFX::BitDepthEnum dstBitDepth = dst->getPixelDepth();
OFX::PixelComponentEnum dstComponents = dst->getPixelComponents();
// fetch main input image
std::unique_ptr<OFX::Image> src(srcClip_->fetchImage(args.time));
// make sure bit depths are sane
if(src.get()) {
OFX::BitDepthEnum srcBitDepth = src->getPixelDepth();
OFX::PixelComponentEnum srcComponents = src->getPixelComponents();
// see if they have the same depths and bytes and all
if(srcBitDepth != dstBitDepth || srcComponents != dstComponents)
throw int(1); // HACK!! need to throw an sensible exception here!
}
std::unique_ptr<OFX::Image> mask;
// do we do masking
if(getContext() != OFX::eContextFilter) {
mask.reset(maskClip_->fetchImage(args.time));
// say we are masking
processor.doMasking(true);
// Set it in the processor
processor.setMaskImg(mask.get());
}
// get the scale parameter values...
double r, g, b, a = aScale_->getValueAtTime(args.time);
r = g = b = scale_->getValueAtTime(args.time);
// see if the individual component scales are enabled
if(componentScalesEnabled_->getValueAtTime(args.time)) {
r *= rScale_->getValueAtTime(args.time);
g *= gScale_->getValueAtTime(args.time);
b *= bScale_->getValueAtTime(args.time);
}
// set the images
processor.setDstImg(dst.get());
processor.setSrcImg(src.get());
// set the render window
processor.setRenderWindow(args.renderWindow);
// set the scales
processor.setScales((float)r, (float)g, (float)b, (float)a);
// Call the base class process member, this will call the derived templated process code
processor.process();
}
// override the rod call
bool
BasicPlugin::getRegionOfDefinition(const OFX::RegionOfDefinitionArguments &args, OfxRectD &rod)
{
// our RoD is the same as the 'Source' clip's, we are not interested in the mask
rod = srcClip_->getRegionOfDefinition(args.time);
// say we set it
return true;
}
// override the roi call
void
BasicPlugin::getRegionsOfInterest(const OFX::RegionsOfInterestArguments &args, OFX::RegionOfInterestSetter &rois)
{
// we don't actually need to do this as this is the default, but do it for examples sake
rois.setRegionOfInterest(*srcClip_, args.regionOfInterest);
// set it on the mask only if we are in an interesting context
if(getContext() != OFX::eContextFilter)
rois.setRegionOfInterest(*maskClip_, args.regionOfInterest);
}
// the overridden render function
void
BasicPlugin::render(const OFX::RenderArguments &args)
{
// instantiate the render code based on the pixel depth of the dst clip
OFX::BitDepthEnum dstBitDepth = dstClip_->getPixelDepth();
OFX::PixelComponentEnum dstComponents = dstClip_->getPixelComponents();
// do the rendering
if(dstComponents == OFX::ePixelComponentRGBA) {
switch(dstBitDepth) {
case OFX::eBitDepthUByte : {
ImageScaler<unsigned char, 4, 255> fred(*this);
setupAndProcess(fred, args);
}
break;
case OFX::eBitDepthUShort : {
ImageScaler<unsigned short, 4, 65535> fred(*this);
setupAndProcess(fred, args);
}
break;
case OFX::eBitDepthFloat : {
ImageScaler<float, 4, 1> fred(*this);
setupAndProcess(fred, args);
}
break;
default :
OFX::throwSuiteStatusException(kOfxStatErrUnsupported);
}
}
else {
switch(dstBitDepth) {
case OFX::eBitDepthUByte : {
ImageScaler<unsigned char, 1, 255> fred(*this);
setupAndProcess(fred, args);
}
break;
case OFX::eBitDepthUShort : {
ImageScaler<unsigned short, 1, 65535> fred(*this);
setupAndProcess(fred, args);
}
break;
case OFX::eBitDepthFloat : {
ImageScaler<float, 1, 1> fred(*this);
setupAndProcess(fred, args);
}
break;
default :
OFX::throwSuiteStatusException(kOfxStatErrUnsupported);
}
}
}
// overridden is identity
bool
BasicPlugin:: isIdentity(const OFX::IsIdentityArguments &args, OFX::Clip * &identityClip, double &identityTime)
{
// get the scale parameters
double scale = scale_->getValueAtTime(args.time);
double rScale = 1, gScale = 1, bScale = 1, aScale = 1;
if(componentScalesEnabled_->getValueAtTime(args.time)) {
rScale = rScale_->getValueAtTime(args.time);
gScale = gScale_->getValueAtTime(args.time);
bScale = bScale_->getValueAtTime(args.time);
aScale = aScale_->getValueAtTime(args.time);
}
rScale *= scale; gScale *= scale; bScale *= scale;
// do we do any scaling ?
if(rScale == 1 && gScale == 1 && bScale == 1 && aScale == 1) {
identityClip = srcClip_;
identityTime = args.time;
return true;
}
// nope, idenity we is
return false;
}
// set the enabledness of the individual component scales
void
BasicPlugin::setEnabledness(void)
{
// the componet enabledness depends on the clip being RGBA and the param being true
bool v = componentScalesEnabled_->getValue() && srcClip_->getPixelComponents() == OFX::ePixelComponentRGBA;
// enable them
rScale_->setEnabled(v);
gScale_->setEnabled(v);
bScale_->setEnabled(v);
aScale_->setEnabled(v);
}
// we have changed a param
void
BasicPlugin::changedParam(const OFX::InstanceChangedArgs &/*args*/, const std::string &paramName)
{
if(paramName == "scaleComponents") setEnabledness();
}
// we have changed a param
void
BasicPlugin::changedClip(const OFX::InstanceChangedArgs &/*args*/, const std::string &clipName)
{
if(clipName == kOfxImageEffectSimpleSourceClipName) setEnabledness();
}
////////////////////////////////////////////////////////////////////////////////
// stuff for the interact
// draw the interact
bool BasicInteract::draw(const OFX::DrawArgs &args)
{
OfxRGBColourF col;
switch(_state)
{
case eInActive : col.r = col.g = col.b = 0.0f; break;
case ePoised : col.r = col.g = col.b = 0.5f; break;
case ePicked : col.r = col.g = col.b = 1.0f; break;
}
// make the box a constant size on screen by scaling by the pixel scale
float dx = (float)(kBoxSize.x * args.pixelScale.x);
float dy = (float)(kBoxSize.y * args.pixelScale.y);
// Draw a cross hair, the current coordinate system aligns with the image plane.
glPushMatrix();
// draw the bo
glColor3f(col.r, col.g, col.b);
glTranslated(_position.x, _position.y, 0);
glBegin(GL_POLYGON);
glVertex2f(-dx, -dy);
glVertex2f(-dx, dy);
glVertex2f( dx, dy);
glVertex2f( dx, -dy);
glEnd();
glPopMatrix();
glPushMatrix();
// draw a complementary outline
glColor3f(1.0f - col.r, 1.0f - col.g, 1.0f - col.b);
glTranslated(_position.x, _position.y, 0);
glBegin(GL_LINE_LOOP);
glVertex2f(-dx, -dy);
glVertex2f(-dx, dy);
glVertex2f( dx, dy);
glVertex2f( dx, -dy);
glEnd();
glPopMatrix();
return true;
}
// overridden functions from OFX::Interact to do things
bool
BasicInteract::penMotion(const OFX::PenArgs &args)
{
// figure the size of the box in cannonical coords
float dx = (float)(kBoxSize.x * args.pixelScale.x);
float dy = (float)(kBoxSize.y * args.pixelScale.y);
// pen position is in cannonical coords
OfxPointD penPos = args.penPosition;
switch(_state) {
case eInActive :
case ePoised :
{
// are we in the box, become 'poised'
StateEnum newState;
penPos.x -= _position.x;
penPos.y -= _position.y;
if(Absolute(penPos.x) < dx &&
Absolute(penPos.y) < dy) {
newState = ePoised;
}
else {
newState = eInActive;
}
if(_state != newState) {
// we have a new state
_state = newState;
// and force an overlay redraw
_effect->redrawOverlays();
}
}
break;
case ePicked :
{
// move our position
_position = penPos;
// and force an overlay redraw
_effect->redrawOverlays();
}
break;
}
// we have trapped it only if the mouse ain't over it or we are actively dragging
return _state != eInActive;
}
bool
BasicInteract::penDown(const OFX::PenArgs &args)
{
// this will refigure the state
penMotion(args);
// if poised means we were over it when the pen went down, so pick it
if(_state == ePoised) {
// we are now picked
_state = ePicked;
// move our position
_position = args.penPosition;
// and request a redraw just incase
_effect->redrawOverlays();
}
return _state == ePicked;
}
bool
BasicInteract::penUp(const OFX::PenArgs &args)
{
if(_state == ePicked) {
// reset to poised for a moment
_state = ePoised;
// this will refigure the state
penMotion(args);
// and redraw for good measure
_effect->redrawOverlays();
// we did trap it
return true;
}
// we didn't trap it
return false;
}
using namespace OFX;
mDeclarePluginFactory(BasicExamplePluginFactory, {}, {});
class BasicExampleOverlayDescriptor : public DefaultEffectOverlayDescriptor<BasicExampleOverlayDescriptor, BasicInteract> {};
void BasicExamplePluginFactory::describe(OFX::ImageEffectDescriptor& desc)
{
// basic labels
desc.setLabels("Gain", "Gain", "Gain");
desc.setPluginGrouping("OFX Example (Support)");
// add the supported contexts, only filter at the moment
desc.addSupportedContext(eContextFilter);
desc.addSupportedContext(eContextGeneral);
desc.addSupportedContext(eContextPaint);
// add supported pixel depths
desc.addSupportedBitDepth(eBitDepthUByte);
desc.addSupportedBitDepth(eBitDepthUShort);
desc.addSupportedBitDepth(eBitDepthFloat);
// set a few flags
desc.setSingleInstance(false);
desc.setHostFrameThreading(false);
desc.setSupportsMultiResolution(true);
desc.setSupportsTiles(true);
desc.setTemporalClipAccess(false);
desc.setRenderTwiceAlways(false);
desc.setSupportsMultipleClipPARs(false);
desc.setOverlayInteractDescriptor( new BasicExampleOverlayDescriptor);
}
// make a double scale param
static
DoubleParamDescriptor *defineScaleParam(OFX::ImageEffectDescriptor &desc,
const std::string &name, const std::string &label, const std::string &hint,
GroupParamDescriptor *parent)
{
DoubleParamDescriptor *param = desc.defineDoubleParam(name);
param->setLabels(label, label, label);
param->setScriptName(name);
param->setHint(hint);
param->setDefault(1);
param->setRange(0, 10);
param->setIncrement(0.1);
param->setDisplayRange(0, 10);
param->setDoubleType(eDoubleTypeScale);
if(parent) param->setParent(*parent);
return param;
}
void BasicExamplePluginFactory::describeInContext(OFX::ImageEffectDescriptor& desc, OFX::ContextEnum context)
{
// Source clip only in the filter context
// create the mandated source clip
ClipDescriptor *srcClip = desc.defineClip(kOfxImageEffectSimpleSourceClipName);
srcClip->addSupportedComponent(ePixelComponentRGBA);
srcClip->addSupportedComponent(ePixelComponentAlpha);
srcClip->setTemporalClipAccess(false);
srcClip->setSupportsTiles(true);
srcClip->setIsMask(false);
// if general or paint context, define the mask clip
if(context == eContextGeneral || context == eContextPaint) {
// if paint context, it is a mandated input called 'brush'
ClipDescriptor *maskClip = context == eContextGeneral ? desc.defineClip("Mask") : desc.defineClip("Brush");
maskClip->addSupportedComponent(ePixelComponentAlpha);
maskClip->setTemporalClipAccess(false);
if(context == eContextGeneral)
maskClip->setOptional(true);
maskClip->setSupportsTiles(true);
maskClip->setIsMask(true); // we are a mask input
}
// create the mandated output clip
ClipDescriptor *dstClip = desc.defineClip(kOfxImageEffectOutputClipName);
dstClip->addSupportedComponent(ePixelComponentRGBA);
dstClip->addSupportedComponent(ePixelComponentAlpha);
dstClip->setSupportsTiles(true);
// make some pages and to things in
PageParamDescriptor *page = desc.definePageParam("Controls");
// group param to group the scales
GroupParamDescriptor *componentScalesGroup = desc.defineGroupParam("componentScales");
componentScalesGroup->setHint("Scales on the individual component");
componentScalesGroup->setLabels("Components", "Components", "Components");
// make overall scale params
DoubleParamDescriptor *param = defineScaleParam(desc, "scale", "scale", "Scales all component in the image", 0);
page->addChild(*param);
// add a boolean to enable the component scale
BooleanParamDescriptor *boolP = desc.defineBooleanParam("scaleComponents");
boolP->setDefault(true);
boolP->setHint("Enables scales on individual components");
boolP->setLabels("Scale Components", "Scale Components", "Scale Components");
boolP->setParent(*componentScalesGroup);
page->addChild(*boolP);
// make the four component scale params
param = defineScaleParam(desc, "scaleR", "red", "Scales the red component of the image", componentScalesGroup);
page->addChild(*param);
param = defineScaleParam(desc, "scaleG", "green", "Scales the green component of the image", componentScalesGroup);
page->addChild(*param);
param = defineScaleParam(desc, "scaleB", "blue", "Scales the blue component of the image", componentScalesGroup);
page->addChild(*param);
param = defineScaleParam(desc, "scaleA", "alpha", "Scales the alpha component of the image", componentScalesGroup);
page->addChild(*param);
}
ImageEffect *BasicExamplePluginFactory::createInstance(OfxImageEffectHandle handle, ContextEnum /*context*/)
{
return new BasicPlugin(handle);
}
namespace OFX
{
namespace Plugin
{
void getPluginIDs(OFX::PluginFactoryArray &ids)
{
static BasicExamplePluginFactory p("net.sf.openfx.basicPlugin", 1, 0);
ids.push_back(&p);
}
}
}
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