138 lines
2.9 KiB
C++
138 lines
2.9 KiB
C++
#include <SDL2/SDL.h>
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#include <SDL2/SDL_ttf.h>
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#include <SDL2/SDL_image.h>
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#include <iostream>
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#include <map>
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#include <memory>
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#include <string>
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#include <vector>
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#include "json.hpp"
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#include "sdl_helpers.h"
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#include "Widgets/Widget.h"
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#include "Widgets/WidgetImage.h"
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#include "Widgets/WidgetRect.h"
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#include "Widgets/WidgetText.h"
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using std::cout;
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using std::endl;
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using std::map;
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using std::shared_ptr;
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using std::string;
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using std::unique_ptr;
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using std::vector;
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using nlohmann::json;
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void init_builders(map<string, unique_ptr<Widget>(*)(const json&)>& widget_builders)
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{
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widget_builders["image"] = &WidgetImage::builder;
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widget_builders["rect"] = &WidgetRect::builder;
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widget_builders["text"] = &WidgetText::builder;
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}
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int main(int argc, char **argv)
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{
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int result = 0;
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bool ok;
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int screen_width = 800;
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int screen_height = 480;
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string output_filename = "trmnl.png";
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string cfg_filename = "config.json";
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json cfg;
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SDL_Surface* main_surface = nullptr;
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vector<json> widgets_cfg;
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vector<shared_ptr<Widget>> widgets;
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map<string, unique_ptr<Widget>(*)(const json&)> widget_builders;
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ok = init_sdl();
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if (!ok)
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{
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return -1;
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}
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if (argc > 1)
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{
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cfg_filename = argv[1];
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}
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// Read JSON CFG
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ok = read_config_json(cfg, cfg_filename);
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if (!ok)
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{
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result = -1;
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goto cleanup;
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}
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// Change screen size from JSON
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json_extract(cfg, "width", screen_width);
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json_extract(cfg, "height", screen_height);
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json_extract(cfg, "font", default_font_name);
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// Create surface
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main_surface = SDL_CreateRGBSurfaceWithFormat(0, screen_width, screen_height, 32, SDL_PIXELFORMAT_RGBA8888);
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if (nullptr == main_surface)
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{
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cout << "Could not allocate main surface" << endl;
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result = -1;
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goto cleanup;
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}
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init_builders(widget_builders);
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// Add Widgets From JSON
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if (cfg.contains("widgets") && cfg["widgets"].is_array())
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{
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widgets_cfg = cfg["widgets"];
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}
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for (const json& j : widgets_cfg)
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{
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string widget_name;
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json_extract(j, "name", widget_name);
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if (widget_name.empty())
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{
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continue;
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}
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// Check if name exists in known builders
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if (0 == widget_builders.count(widget_name))
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{
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cout << "Unknown widget '" << widget_name << "'. Skipping ..." << endl;
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continue;
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}
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// Construct and add widget to vector
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shared_ptr<Widget> widget = widget_builders[widget_name](j);
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if (nullptr != widget)
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{
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widgets.push_back(widget);
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}
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}
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// Clear screen with white
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SDL_FillRect(main_surface, nullptr, SDL_MapRGBA(main_surface->format, 255, 255, 255, SDL_ALPHA_OPAQUE));
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// Draw and apply all widgets
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for (shared_ptr<Widget>& widget : widgets)
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{
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widget->draw();
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SDL_Rect rect = widget->get_rect();
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SDL_BlitSurface(widget->get_internal_surface(), nullptr, main_surface, &rect);
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}
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// Save image
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json_extract(cfg, "output", output_filename);
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IMG_SavePNG(main_surface, output_filename.c_str());
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cleanup:
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widgets.clear();
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clean_sdl();
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return result;
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}
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