From 4ec94c97879aafef15f7663135745e4ba61e62cf Mon Sep 17 00:00:00 2001
From: Adrian Kummerlaender
Date: Mon, 17 May 2021 00:15:33 +0200
Subject: Extract first public LiterateLB version

---
 tangle/util/render_window.h | 95 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 tangle/util/render_window.h

(limited to 'tangle/util/render_window.h')

diff --git a/tangle/util/render_window.h b/tangle/util/render_window.h
new file mode 100644
index 0000000..4392150
--- /dev/null
+++ b/tangle/util/render_window.h
@@ -0,0 +1,95 @@
+#pragma once
+
+#include <SFML/Graphics.hpp>
+#include <SFML/Graphics/Image.hpp>
+
+#include <imgui.h>
+#include <imgui-SFML.h>
+
+#include "texture.h"
+#include "assets.h"
+
+class RenderWindow {
+private:
+sf::RenderWindow _window;
+
+sf::Sprite          _render_sprite;
+sf::Texture         _render_texture;
+cudaSurfaceObject_t _render_surface;
+sf::Rect<int>       _render_texture_view;
+
+sf::Shader _blur_shader;
+bool _blur = false;
+
+sf::Clock _ui_delta_clock;
+
+public:
+RenderWindow(std::string name):
+  _window(sf::VideoMode(800, 600), name) {
+  _render_texture.create(sf::VideoMode::getDesktopMode().width, sf::VideoMode::getDesktopMode().height);
+  _render_surface = bindTextureToCuda(_render_texture);
+  _render_sprite.setTexture(_render_texture);
+  _render_texture_view = sf::Rect<int>(0,0,_window.getSize().x,_window.getSize().y);
+  _render_sprite.setTextureRect(_render_texture_view);
+  _window.setView(sf::View(sf::Vector2f(_render_texture_view.width/2, _render_texture_view.height/2),
+                           sf::Vector2f(_window.getSize().x, _window.getSize().y)));
+  _window.setVerticalSyncEnabled(true);
+  _blur_shader.loadFromMemory(std::string(reinterpret_cast<const char*>(assets::shader::file_blur_frag)), sf::Shader::Fragment);
+  _blur_shader.setUniform("texture", sf::Shader::CurrentTexture);
+  ImGui::SFML::Init(_window);
+  ImGuiIO& io = ImGui::GetIO();
+  io.MouseDrawCursor = true;
+};
+
+bool isOpen() const {
+  return _window.isOpen();
+}
+
+void setBlur(bool state) {
+  _blur = state;
+}
+
+template <typename UI, typename MOUSE>
+void draw(UI ui, MOUSE mouse);
+
+cudaSurfaceObject_t getRenderSurface() {
+  return _render_surface;
+}
+
+sf::Rect<int> getRenderView() {
+  return _render_texture_view;
+}
+
+};
+
+template <typename UI, typename MOUSE>
+void RenderWindow::draw(UI ui, MOUSE mouse) {
+  sf::Event event;
+  while (_window.pollEvent(event)) {
+    ImGui::SFML::ProcessEvent(event);
+    if (event.type == sf::Event::Closed) {
+      _window.close();
+    }
+    if (event.type == sf::Event::Resized) {
+      _render_texture_view = sf::Rect<int>(0,0,event.size.width,event.size.height);
+      _render_sprite.setTextureRect(_render_texture_view);
+      sf::View view(sf::Vector2f(_render_texture_view.width/2, _render_texture_view.height/2),
+                    sf::Vector2f(event.size.width, event.size.height));
+      _window.setView(view);
+    }
+    if (!ImGui::GetIO().WantCaptureMouse) {
+      mouse(event);
+    }
+  }
+
+  ImGui::SFML::Update(_window, _ui_delta_clock.restart());
+  ui();
+  _window.clear();
+  if (_blur) {
+    _window.draw(_render_sprite, &_blur_shader);
+  } else {
+    _window.draw(_render_sprite);
+  }
+  ImGui::SFML::Render(_window);
+  _window.display();
+}
-- 
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