/** * @file * @brief Source file for TextReader class * @author Jonathan Thomas * * @section LICENSE * * Copyright (c) 2008-2013 OpenShot Studios, LLC * (http://www.openshotstudios.com). This file is part of * OpenShot Library (http://www.openshot.org), an open-source project * dedicated to delivering high quality video editing and animation solutions * to the world. * * OpenShot Library is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * OpenShot Library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with OpenShot Library. If not, see . */ #include "../include/TextReader.h" using namespace openshot; TextReader::TextReader(int width, int height, int x_offset, int y_offset, GravityType gravity, string text, string font, double size, string text_color, string background_color) : width(width), height(height), x_offset(x_offset), y_offset(y_offset), text(text), font(font), size(size), text_color(text_color), background_color(background_color), is_open(false), gravity(gravity) { // Init FileInfo struct (clear all values) InitFileInfo(); // Open and Close the reader, to populate it's attributes (such as height, width, etc...) Open(); Close(); } // Open reader void TextReader::Open() { // Open reader if not already open if (!is_open) { // create image image = tr1::shared_ptr(new Magick::Image(Magick::Geometry(width,height), Magick::Color(background_color))); // Give image a transparent background color image->backgroundColor(Magick::Color("none")); // Set gravity (map between OpenShot and ImageMagick) switch (gravity) { case GRAVITY_TOP_LEFT: lines.push_back(Magick::DrawableGravity(Magick::NorthWestGravity)); break; case GRAVITY_TOP: lines.push_back(Magick::DrawableGravity(Magick::NorthGravity)); break; case GRAVITY_TOP_RIGHT: lines.push_back(Magick::DrawableGravity(Magick::NorthEastGravity)); break; case GRAVITY_LEFT: lines.push_back(Magick::DrawableGravity(Magick::WestGravity)); break; case GRAVITY_CENTER: lines.push_back(Magick::DrawableGravity(Magick::CenterGravity)); break; case GRAVITY_RIGHT: lines.push_back(Magick::DrawableGravity(Magick::EastGravity)); break; case GRAVITY_BOTTOM_LEFT: lines.push_back(Magick::DrawableGravity(Magick::SouthWestGravity)); break; case GRAVITY_BOTTOM: lines.push_back(Magick::DrawableGravity(Magick::SouthGravity)); break; case GRAVITY_BOTTOM_RIGHT: lines.push_back(Magick::DrawableGravity(Magick::SouthEastGravity)); break; } // Set stroke properties lines.push_back(Magick::DrawableStrokeColor(Magick::Color("none"))); lines.push_back(Magick::DrawableStrokeWidth(0.0)); lines.push_back(Magick::DrawableFillColor(text_color)); lines.push_back(Magick::DrawableFont(font)); lines.push_back(Magick::DrawablePointSize(size)); lines.push_back(Magick::DrawableText(x_offset, y_offset, text)); // Draw image image->draw(lines); // Update image properties info.has_audio = false; info.has_video = true; info.file_size = image->fileSize(); info.vcodec = image->format(); info.width = image->size().width(); info.height = image->size().height(); info.pixel_ratio.num = 1; info.pixel_ratio.den = 1; info.duration = 60 * 60 * 24; // 24 hour duration info.fps.num = 30; info.fps.den = 1; info.video_timebase.num = 1; info.video_timebase.den = 30; info.video_length = round(info.duration * info.fps.ToDouble()); // Calculate the DAR (display aspect ratio) Fraction size(info.width * info.pixel_ratio.num, info.height * info.pixel_ratio.den); // Reduce size fraction size.Reduce(); // Set the ratio based on the reduced fraction info.display_ratio.num = size.num; info.display_ratio.den = size.den; // Mark as "open" is_open = true; } } // Close reader void TextReader::Close() { // Close all objects, if reader is 'open' if (is_open) { // Mark as "closed" is_open = false; } } // Get an openshot::Frame object for a specific frame number of this reader. tr1::shared_ptr TextReader::GetFrame(int requested_frame) throw(ReaderClosed) { if (image) { // Create or get frame object tr1::shared_ptr image_frame(new Frame(requested_frame, image->size().width(), image->size().height(), "#000000", 0, 2)); image_frame->SetSampleRate(44100); // Add Image data to frame tr1::shared_ptr copy_image(new Magick::Image(*image.get())); copy_image->modifyImage(); // actually copy the image data to this object image_frame->AddImage(copy_image); // return frame object return image_frame; } } // Generate Json::JsonValue for this object Json::Value TextReader::JsonValue() { // Create root json object Json::Value root = ReaderBase::JsonValue(); // get parent properties root["width"] = width; root["height"] = height; root["x_offset"] = x_offset; root["y_offset"] = y_offset; root["text"] = text; root["font"] = font; root["size"] = size; root["text_color"] = text_color; root["background_color"] = background_color; root["gravity"] = gravity; // return JsonValue return root; } // Load Json::JsonValue into this object void TextReader::Json(Json::Value root) throw(InvalidFile) { // Set parent data ReaderBase::Json(root); // Set data from Json (if key is found) if (root["width"] != Json::nullValue) width = root["width"].asInt(); if (root["height"] != Json::nullValue) height = root["height"].asInt(); if (root["x_offset"] != Json::nullValue) x_offset = root["x_offset"].asInt(); if (root["y_offset"] != Json::nullValue) y_offset = root["y_offset"].asInt(); if (root["text"] != Json::nullValue) text = root["text"].asString(); if (root["font"] != Json::nullValue) font = root["font"].asString(); if (root["size"] != Json::nullValue) size = root["size"].asDouble(); if (root["text_color"] != Json::nullValue) text_color = root["text_color"].asString(); if (root["background_color"] != Json::nullValue) background_color = root["background_color"].asString(); if (root["gravity"] != Json::nullValue) gravity = (GravityType) root["gravity"].asInt(); // Open path, and re-init everything Close(); Open(); }