1 files changed, 148 insertions, 0 deletions
diff --git a/src/windows.c b/src/windows.c
new file mode 100644
index 0000000..a439ebe
--- /dev/null
+++ b/src/windows.c
@@ -0,0 +1,148 @@
+#include <windows.h>
+#include <gl/GL.h>
+#include <stdio.h>
+
+#include "game.hpp"
+
+struct wincontext_t {
+    HWND window;
+    HDC device_context;
+    i32 width;
+    i32 height;
+};
+
+static wincontext_t wincontext;
+static input_t input;
+
+LRESULT WndProc(HWND window, UINT message, WPARAM wparam, LPARAM lparam)
+{
+    LRESULT result = 0;
+    switch (message) {
+    case WM_DESTROY:
+    case WM_QUIT:
+        wincontext.running = 0;
+        break;
+    case WM_KEYDOWN:
+        switch (wparam) {
+        case VK_ESCAPE:
+            input.escape.current = 1;
+            break;
+        default:
+            break;
+        }
+        break;
+    case WM_KEYUP:
+        switch (wparam) {
+        case VK_ESCAPE:
+            input.escape.current = 0;
+            break;
+        default:
+            break;
+        }
+        break;
+    case WM_SIZE:
+        wincontext.width = LOWORD(lparam);
+        wincontext.height = HIWORD(lparam);
+        glViewport(wincontext.width, wincontext.height);
+        break;
+    default:
+        result = DefWindowProc(window, message, wparam, lparam);
+    }
+    return result;
+}
+
+void update_input(input_t *input)
+{
+    input->escape.last = input->escape.current;
+}
+
+i32 init_win(HINSTANCE instance, i32 show_cmd, i32 width, i32 height)
+{
+    WNDCLASSA window_class = {};
+    window_class.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
+    window_class.lpfnWndProc = (WNDPROC)WndProc;
+    window_class.hInstance = instance;
+    window_class.hCursor = LoadCursor(0, IDC_ARROW);
+    window_class.lpszClassName = "window class";
+    if (!RegisterClass(&window_class)) {
+        printf("error: failed to register window class\n");
+        return 0;
+    }
+
+    wincontext.width = width;
+    wincontext.height = height;
+    wincontext.window = CreateWindow(window_class.lpszClassName, "game", WS_OVERLAPPEDWINDOW,
+        CW_USEDEFAULT, CW_USEDEFAULT, wincontext.width, wincontext.height, 0, 0, instance, 0);
+    if (!wincontext.window) {
+        printf("error: failed to create a window\n");
+        return 0;
+    }
+
+    wincontext.running = 1;
+
+    wincontext.device_context = GetDC(wincontext.window);
+    if (!wincontext.device_context) {
+        printf("error: failed to get device context\n");
+        return 0;
+    }
+
+    PIXELFORMATDESCRIPTOR pixel_format_desc = {};
+    pixel_format_desc.nSize = sizeof(PIXELFORMATDESCRIPTOR);
+    pixel_format_desc.nVersion = 1;
+    pixel_format_desc.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
+    pixel_format_desc.cColorBits = 32;
+    pixel_format_desc.cAlphaBits = 8;
+    pixel_format_desc.cDepthBits = 24;
+
+    i32 pixel_format = ChoosePixelFormat(wincontext.device_context, &pixel_format_desc);
+    if (!pixel_format) {
+        printf("error: failed to choose pixel format\n");
+        return 0;
+    }
+    if (!SetPixelFormat(wincontext.device_context, pixel_format, &pixel_format_desc)) {
+        printf("error: failed to set pixel format\n");
+        return 0;
+    }
+
+    HGLRC gl_context = wglCreateContext(wincontext.device_context);
+    if (!gl_context) {
+        printf("error: failed to create gl context\n");
+        return 0;
+    }
+    if (!wglMakeCurrent(wincontext.device_context, gl_context)) {
+        printf("error: failed to make gl context current\n");
+        return 0;
+    }
+
+    ShowWindow(wincontext.window, show_cmd);
+    UpdateWindow(wincontext.window);
+
+    return 1;
+}
+
+void handle_win_events()
+{
+    MSG messages;
+    while (PeekMessage(&messages, 0, 0, 0, PM_REMOVE)) {
+        TranslateMessage(&messages);
+        DispatchMessage(&messages);
+    }
+}
+
+int WinMain(HINSTANCE instance, HINSTANCE prev_instance, LPSTR cmdline, int show_cmd)
+{
+    if (!init_win(instance, show_cmd, 1600, 900))
+        return 1;
+
+    if (!init_game()) {
+    }
+
+    while (wincontext.running) {
+        handle_win_events();
+        game_update_and_render(input);
+        update_input(&input);
+        SwapBuffers(wincontext.device_context);
+    }
+
+    return 0;
+}