From 60072c1d8089ffd3294e76636198d14710be95b8 Mon Sep 17 00:00:00 2001
From: Yann Herklotz <ymherklotz@gmail.com>
Date: Sat, 9 Sep 2017 07:55:22 +0100
Subject: Restructuring

---
 yage/base/window.cpp | 97 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 97 insertions(+)
 create mode 100644 yage/base/window.cpp

(limited to 'yage/base/window.cpp')

diff --git a/yage/base/window.cpp b/yage/base/window.cpp
new file mode 100644
index 00000000..143b1d5d
--- /dev/null
+++ b/yage/base/window.cpp
@@ -0,0 +1,97 @@
+/* ----------------------------------------------------------------------------
+ * window.cpp
+ *
+ * Copyright (c) 2017 Yann Herklotz Grave <ymherklotz@gmail.com> -- MIT License
+ * See file LICENSE for more details
+ * ----------------------------------------------------------------------------
+ */
+
+#include <YAGE/window.h>
+#include <GL/glew.h>
+
+#include <iostream>
+#include <stdexcept>
+
+namespace yage
+{
+
+Window::Window() = default;
+
+Window::~Window()
+{
+    SDL_DestroyWindow(window_);
+}
+
+void Window::create(const std::string &window_name, int width, int height,
+                    unsigned flags)
+{
+    Uint32 gl_window_states = 0;
+
+    // set the correct input flags
+    if (flags & WindowFlags::SHOWN) {
+        gl_window_states |= SDL_WINDOW_OPENGL;
+    }
+    if (flags & WindowFlags::HIDDEN) {
+        gl_window_states |= SDL_WINDOW_HIDDEN;
+    }
+    if (flags & WindowFlags::FULLSCREEN) {
+        gl_window_states |= SDL_WINDOW_FULLSCREEN;
+    }
+    if (flags & WindowFlags::BORDERLESS) {
+        gl_window_states |= SDL_WINDOW_BORDERLESS;
+    }
+
+    // SDL_GL options
+
+    // SDL_GL_SetAttribute (SDL_GL_CONTEXT_MAJOR_VERSION, 4);
+    // SDL_GL_SetAttribute (SDL_GL_CONTEXT_MINOR_VERSION, 5);
+    SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
+
+    // create the SDL window
+    window_ = SDL_CreateWindow(window_name.c_str(), SDL_WINDOWPOS_CENTERED,
+                               SDL_WINDOWPOS_CENTERED, width, height,
+                               gl_window_states);
+    if (window_ == nullptr) {
+        throw std::runtime_error("SDL_CreateWindow failed");
+    }
+
+    // initialize the GL context in the window
+    SDL_GLContext gl_context = SDL_GL_CreateContext(window_);
+    if (gl_context == nullptr) {
+        throw std::runtime_error("SDL_GL_CreateContext failed");
+    }
+
+    // initialize glew
+    GLenum error = glewInit();
+    if (error != GLEW_OK) {
+        throw std::runtime_error("glewInit failed");
+    }
+
+    // print out the current OpenGL version to debug
+    std::cout << "***  OpenGL version: " << glGetString(GL_VERSION)
+              << "  ***\n";
+
+    // set vsync on instead of custom fps limiting
+    SDL_GL_SetSwapInterval(1);
+    // set the clear color to black
+    glClearColor(0.f, 0.5f, 0.f, 1.f);
+    // set alpha blending
+    glEnable(GL_BLEND);
+    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+}
+
+void Window::swapBuffer()
+{
+    // swap the window buffer
+    SDL_GL_SwapWindow(window_);
+}
+
+void Window::clearBuffer()
+{
+    // set the clear depth
+    glClearDepth(1.f);
+    // clears buffer with clear color
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+}
+
+} // namespace yage
-- 
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