/** * @file * @brief Source file for TextReader class * @author Jonathan Thomas * * @section LICENSE * * Copyright (c) 2008-2014 OpenShot Studios, LLC * . This file is part of * OpenShot Library (libopenshot), an open-source project dedicated to * delivering high quality video editing and animation solutions to the * world. For more information visit . * * OpenShot Library (libopenshot) is free software: you can redistribute it * and/or modify it under the terms of the GNU Lesser 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 (libopenshot) 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 Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with OpenShot Library. If not, see . */ #include "../include/TextReader.h" using namespace openshot; /// Default constructor (blank text) TextReader::TextReader() : width(1024), height(768), x_offset(0), y_offset(0), text(""), font("Arial"), size(10.0), text_color("#ffffff"), background_color("#000000"), is_open(false), gravity(GRAVITY_CENTER) { // Open and Close the reader, to populate it's attributes (such as height, width, etc...) Open(); Close(); } 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) { // 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 = std::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. std::shared_ptr TextReader::GetFrame(int64_t requested_frame) throw(ReaderClosed) { if (image) { // Create or get frame object std::shared_ptr image_frame(new Frame(requested_frame, image->size().width(), image->size().height(), "#000000", 0, 2)); // Add Image data to frame std::shared_ptr copy_image(new Magick::Image(*image.get())); copy_image->modifyImage(); // actually copy the image data to this object //TODO: Reimplement this with QImage //image_frame->AddImage(copy_image); // return frame object return image_frame; } else { // return empty frame std::shared_ptr image_frame(new Frame(1, 640, 480, "#000000", 0, 2)); // return frame object return image_frame; } } // Generate JSON string of this object string TextReader::Json() { // Return formatted string return JsonValue().toStyledString(); } // Generate Json::JsonValue for this object Json::Value TextReader::JsonValue() { // Create root json object Json::Value root = ReaderBase::JsonValue(); // get parent properties root["type"] = "TextReader"; 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 string into this object void TextReader::SetJson(string value) throw(InvalidJSON) { // Parse JSON string into JSON objects Json::Value root; Json::Reader reader; bool success = reader.parse( value, root ); if (!success) // Raise exception throw InvalidJSON("JSON could not be parsed (or is invalid)", ""); try { // Set all values that match SetJsonValue(root); } catch (exception e) { // Error parsing JSON (or missing keys) throw InvalidJSON("JSON is invalid (missing keys or invalid data types)", ""); } } // Load Json::JsonValue into this object void TextReader::SetJsonValue(Json::Value root) throw(InvalidFile) { // Set parent data ReaderBase::SetJsonValue(root); // Set data from Json (if key is found) if (!root["width"].isNull()) width = root["width"].asInt(); if (!root["height"].isNull()) height = root["height"].asInt(); if (!root["x_offset"].isNull()) x_offset = root["x_offset"].asInt(); if (!root["y_offset"].isNull()) y_offset = root["y_offset"].asInt(); if (!root["text"].isNull()) text = root["text"].asString(); if (!root["font"].isNull()) font = root["font"].asString(); if (!root["size"].isNull()) size = root["size"].asDouble(); if (!root["text_color"].isNull()) text_color = root["text_color"].asString(); if (!root["background_color"].isNull()) background_color = root["background_color"].asString(); if (!root["gravity"].isNull()) gravity = (GravityType) root["gravity"].asInt(); // Re-Open path, and re-init everything (if needed) if (is_open) { Close(); Open(); } }