From 70835b8593115eefa0d5b7225174eccc100e9f73 Mon Sep 17 00:00:00 2001
From: Robert <robert.trololo@gmail.com>
Date: Mon, 31 Aug 2020 18:27:16 +0200
Subject: [PATCH] Able to handle multiple windows

---
 src/CMakeLists.txt |  3 +--
 src/PlotWindow.cpp | 53 ++++++++++++++++++++++++++++++++++++++++++++++
 src/PlotWindow.hpp | 22 +++++++++++++++++++
 src/main.cpp       | 34 +++++++++++++++++++++++++++++
 4 files changed, 110 insertions(+), 2 deletions(-)
 create mode 100644 src/PlotWindow.cpp

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index a4330f4..90e6ddf 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,7 +1,7 @@
 
 add_executable(ComplexPlotting
 	"main.cpp"
-  "PlotWindow.hpp")
+  "PlotWindow.hpp" "PlotWindow.cpp")
 
 file(GLOB vendor_SRC
 	${CMAKE_SOURCE_DIR}/vendor/src/*.c
@@ -13,7 +13,6 @@ target_sources(ComplexPlotting PRIVATE
 
 target_include_directories(ComplexPlotting PRIVATE
 	glfw
-	./primitives
 	${CMAKE_SOURCE_DIR}/vendor/include
 )
 
diff --git a/src/PlotWindow.cpp b/src/PlotWindow.cpp
new file mode 100644
index 0000000..225676c
--- /dev/null
+++ b/src/PlotWindow.cpp
@@ -0,0 +1,53 @@
+#include "PlotWindow.hpp"
+
+#include <iostream>
+#include <string>
+
+PlotWindow::PlotWindow(int w, int h, int id) :
+	window(nullptr), id(id)
+{
+	window = glfwCreateWindow(w, h, (std::string("Plot ") + std::to_string(id)).c_str(), NULL, NULL);
+	if (window == nullptr)
+	{
+		const char* buffer = new const char[512];
+		glfwGetError(&buffer);
+		std::cerr << "Failed to initialize GLFWwindow: " << std::endl << buffer << std::endl;
+		delete[] buffer;
+		buffer = nullptr;
+		return;
+	}
+
+	glfwMakeContextCurrent(window);
+	glfwSetFramebufferSizeCallback(window, FramebufferSizeCallback);
+
+	if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress))
+	{
+		std::cerr << "Failed to initialize GLAD" << std::endl;
+		return;
+	}
+
+	glViewport(0, 0, w, h);
+}
+
+void PlotWindow::Destroy()
+{
+	glfwDestroyWindow(window);
+}
+
+void PlotWindow::GiveContext()
+{
+	glfwMakeContextCurrent(window);
+}
+
+void PlotWindow::Display()
+{
+	glClearColor(0.6f, 0.1f, 0.4f, 1.0f);
+	glClear(GL_COLOR_BUFFER_BIT);
+
+	glfwSwapBuffers(window);
+}
+
+void PlotWindow::FramebufferSizeCallback(GLFWwindow* window, int w, int h)
+{
+	glViewport(0, 0, w, h);
+}
diff --git a/src/PlotWindow.hpp b/src/PlotWindow.hpp
index e69de29..8547e5b 100644
--- a/src/PlotWindow.hpp
+++ b/src/PlotWindow.hpp
@@ -0,0 +1,22 @@
+#pragma once
+
+#include <glad/glad.h>
+#include <glfw/glfw3.h>
+
+class PlotWindow
+{
+public:
+	PlotWindow(int w, int h, int id);
+
+	bool ShouldClose() { return glfwWindowShouldClose(window); }
+	void Destroy();
+
+	void GiveContext();
+	void Display();
+
+private:
+	int id;
+	GLFWwindow* window;
+
+	static void FramebufferSizeCallback(GLFWwindow* window, int w, int h);
+};
\ No newline at end of file
diff --git a/src/main.cpp b/src/main.cpp
index ae5fa9f..a7dfbe4 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,6 +1,12 @@
 #include <iostream>
+#include <vector>
+#include <algorithm>
+
+#include <glad/glad.h>
 #include <glfw/glfw3.h>
 
+#include "PlotWindow.hpp"
+
 int main(int argc, char** argv)
 {
 	int result = glfwInit();
@@ -10,4 +16,32 @@ int main(int argc, char** argv)
 		glfwGetError(&buffer);
 		std::cout << "Failed to initialize GLFW: " << std::endl << buffer << std::endl;
 	}
+
+	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
+	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 6);
+	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+
+	std::vector<PlotWindow> windows;
+	windows.emplace_back(500, 500, 1);
+	windows.emplace_back(500, 500, 2);
+	windows.emplace_back(500, 500, 3);
+
+	while (!windows.empty())
+	{
+		glfwPollEvents();
+
+		for (std::vector<PlotWindow>::iterator it = windows.begin(); it != windows.end();)
+		{
+			if (it->ShouldClose())
+			{
+				it->Destroy();
+				it = windows.erase(it);
+				continue;
+			}
+
+			it->GiveContext();
+			it->Display();
+			it++;
+		}
+	}
 }
\ No newline at end of file