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ofImageに文字によるマスク処理。マスク用の関数が用意されているので凄く簡単にできました。
ofImage on Mask.
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#pragma once #include "ofMain.h" #include "ofFbo.h"; class ofApp : public ofBaseApp { public: void setup(); void update(); void draw(); void keyPressed(int key) {}; void keyReleased(int key) {}; void mouseMoved(int x, int y) {}; void mouseDragged(int x, int y, int button){}; void mousePressed(int x, int y, int button) {}; void mouseReleased(int x, int y, int button) {}; void mouseEntered(int x, int y) {}; void mouseExited(int x, int y) {}; void windowResized(int w, int h) {}; void dragEvent(ofDragInfo dragInfo) {}; void gotMessage(ofMessage msg) {}; ofImage image; ofTrueTypeFont font; int font_size; ofFbo fbo; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(60); ofBackground(0); ofSetWindowTitle("Insta"); this->image.loadImage("Lenna.png"); this->font_size = 300; this->fbo.allocate(ofGetWidth(), ofGetHeight()); } //-------------------------------------------------------------- void ofApp::update() { this->font.loadFont("fonts/Kazesawa-Bold.ttf", this->font_size , true, false, true); this->fbo.begin(); ofClear(0); string word = "LENNA"; int x = ofGetWidth() - ((ofGetFrameNum() * 5) % (ofGetWidth() + (int)this->font.stringWidth(word))); int y = ofGetHeight() / 2 + this->font.stringHeight(word) / 2; this->font.drawString(word, x, y); this->fbo.end(); this->image.getTextureReference().setAlphaMask(this->fbo.getTexture()); } //-------------------------------------------------------------- void ofApp::draw() { this->image.update(); this->image.draw(0, 0); } //-------------------------------------------------------------- int main() { ofSetupOpenGL(512, 512, OF_WINDOW); ofRunApp(new ofApp()); } |