saveFrame()

void saveFrame(const std::string& filename="frame-####.png");

void PApplet::saveFrame(const std::string& filename) { std::string fn = filename; size_t pos = fn.find("####"); if (pos != std::string::npos) { char buf[16]; snprintf(buf, sizeof(buf), "%04d", frameCount); fn.replace(pos, 4, buf); } int w = pixelWidth > 0 ? pixelWidth : logicalW; int h = pixelHeight > 0 ? pixelHeight : logicalH; std::vector<unsigned char> px(w * h * 3); glPixelStorei(GL_PACK_ALIGNMENT, 1); glReadPixels(0, 0, w, h, GL_RGB, GL_UNSIGNED_BYTE, px.data()); for (int y = 0; y < h / 2; y++) for (int x = 0; x < w * 3; x++) std::swap(px[y*w*3+x], px[(h-1-y)*w*3+x]); std::string ext = fn.size() > 4 ? fn.substr(fn.size()-4) : ""; for (auto& c : ext) c = tolower(c); int ok = 0; if (ext == ".png") ok = stbi_write_png(fn.c_str(), w, h, 3, px.data(), w*3); else if (ext == ".jpg" || ext == "jpeg") ok = stbi_write_jpg(fn.c_str(), w, h, 3, px.data(), 95); else if (ext == ".bmp") ok = stbi_write_bmp(fn.c_str(), w, h, 3, px.data()); else if (ext == ".tga" || ext == ".tif" || ext == ".tiff") ok = stbi_write_tga(fn.c_str(), w, h, 3, px.data()); else { fn += ".png"; ok = stbi_write_png(fn.c_str(), w, h, 3, px.data(), w*3); } if (ok) std::cout << "Saved: " << fn << "\n"; else std::cout << "save: failed to write " << fn << "\n"; } void PApplet::save(const std::string& fn){saveFrame(fn);