ofxVariableLab/src/Layer.cpp

#include "Layer.h"
#include "conversion.h"
#include "ofAppRunner.h"
#include "ofGraphics.h"
#include "ofUtils.h"

namespace ofxVariableLab {

Layer::Layer(){
}
Layer::~Layer(){
}
MsdfLayer::MsdfLayer(){
}
MsdfLayer::~MsdfLayer(){
}

void Layer::update(){
    if(isDirty){

        isDirty = false;
    }
}

void MsdfLayer::draw(glm::vec3 position) const {
    const ofImage & atlasImage = atlas->getAtlasImage();
    ofDisableAlphaBlending();
    ofEnableDepthTest();
    shader->begin();
    shader->setUniformTexture("msdf", atlasImage.getTexture(), 0);
    shader->setUniform4f("fontColor", ofFloatColor::white);
    float pixelRange = 2;
    int atlas_w = atlasImage.getWidth();
    int atlas_h = atlasImage.getHeight();
    int atlas_x = 0;
    int atlas_y = 0;
    glm::vec2 unitRange = glm::vec2(pixelRange) / glm::vec2(atlas_w, atlas_h);
    shader->setUniform2f("unitRange", unitRange);
    shader->end();

    ofPushMatrix();
    //cout << "drawing letters (" << ofToString(propsBuffer.size()) << ")" << endl;
    for(const char c : propsBuffer[0].text){
        ofxMsdfgen::GlyphGeometry gg = atlas->getGlyphGeometry(c);
        int x, y, w, h;
        gg.getBoxRect(x, y, w, h);
        y = atlas_h - (y + h);
        if(y < 0){
            // FIXME: make sure this does not happen
            ofLogError("MsdfLayer::draw") << "y smaller 0, this is not good" << endl;
        }
        ofPushStyle();
        ofNoFill();
        ofSetColor(ofFloatColor(sin(ofGetElapsedTimeMicros() * 0.0001) * 0.5 + 0.5, 0, 0, 1));
        double pl, pb, pr, pt,
               il, ib, ir, it;
        gg.getQuadPlaneBounds(pl, pb, pr, pt);
        gg.getQuadAtlasBounds(il, ib, ir, it);

        ofPushMatrix();
        float magic = ofMap(sin(ofGetElapsedTimeMicros() * 0.000001), -1, 1, 1, 1000);
        ofTranslate(pr * magic, pt * magic, 0);
        //if(ofGetFrameNum() % 30 == 0){
        //cout << "drawing letter " << c << endl
        //<< "\tpl: " << ofToString(pl)
        //<< "\tpb: " << ofToString(pb)
        //<< "\tpr: " << ofToString(pr)
        //<< "\tpt: " << ofToString(pt)
        //<< endl;
        //}

        ofFill();
        shader->begin();
        ofSetColor(ofFloatColor(1, 1, 1, 1));
        atlasImage.drawSubsection(0, 0, w, h, x, y, w, h);
        shader->end();
        ofPopMatrix();
        ofPopStyle();
        ofTranslate(w, 0, 0);
    }
    ofPopMatrix();
    //atlasImage.draw(x, y);
    ofDisableDepthTest();
    ofEnableAlphaBlending();
}
void Layer::setProps(const Props & props){
    while(propsBuffer.size() > max(0, int(settings.maxBufferSize - 1))){
        propsBuffer.pop_back();
    }
    propsBuffer.push_front(props);
}
void Layer::clearPropsBuffer(){
    propsBuffer.clear();
}
void Layer::setId(const string & id){
    this->id = id;
}
const string & Layer::getId(){
    return id;
}
}