146 lines
4.1 KiB
C++
146 lines
4.1 KiB
C++
#include "platform.h"
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#include <windows.h>
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#include <math.h>
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Image screen;
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float* depth_buffer;
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bool keydown_a;
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bool keydown_b;
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GLOBAL bool g_app_is_running = true;
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GLOBAL HBITMAP g_screen_dib;
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GLOBAL HDC g_screen_dc;
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GLOBAL HDC g_window_dc;
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GLOBAL HWND g_hwnd;
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GLOBAL HINSTANCE g_hinstance;
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GLOBAL int g_cmdshow;
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#include <shellscalingapi.h>
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typedef HRESULT tSetProcessDpiAwareness(PROCESS_DPI_AWARENESS);
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FUNCTION
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LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {
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LRESULT result = 0;
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switch (uMsg) {
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case WM_CLOSE: DestroyWindow(hwnd); g_app_is_running = false; break;
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case WM_DESTROY: PostQuitMessage(0); g_app_is_running = false; break;
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case WM_SYSKEYDOWN:
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case WM_KEYDOWN: {
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switch (wParam) {
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case VK_ESCAPE: g_app_is_running = false; break;
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case 0x4F: keydown_a = true; break;
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case 0x50: keydown_b = true; break;
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}
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} break;
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case WM_SYSKEYUP:
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case WM_KEYUP: {
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switch (wParam) {
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case 0x4F: keydown_a = false; break;
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case 0x50: keydown_b = false; break;
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}
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} break;
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default: result = DefWindowProc(hwnd, uMsg, wParam, lParam);
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}
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return result;
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}
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FUNCTION
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void Win32_ScreenInit(int window_x, int window_y) {
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BITMAPINFO bminfo = {};
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bminfo.bmiHeader.biSize = sizeof(bminfo.bmiHeader);
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bminfo.bmiHeader.biWidth = window_x;
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bminfo.bmiHeader.biHeight = -window_y;
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bminfo.bmiHeader.biPlanes = 1;
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bminfo.bmiHeader.biBitCount = 32;
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bminfo.bmiHeader.biCompression = BI_RGB; // AA RR GG BB
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bminfo.bmiHeader.biXPelsPerMeter = 1;
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bminfo.bmiHeader.biYPelsPerMeter = 1;
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void* mem = 0;
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g_screen_dib = CreateDIBSection(g_window_dc, &bminfo, DIB_RGB_COLORS, (void**)&mem, 0, 0);
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g_screen_dc = CreateCompatibleDC(g_window_dc);
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screen.pixels = (uint32_t*)mem;
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depth_buffer = (float*)malloc((size_t)window_x * (size_t)window_y * sizeof(float));
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screen.x = window_x;
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screen.y = window_y;
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}
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void OS_Init(OSInitArgs i) {
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HMODULE shcore = LoadLibraryA("Shcore.dll");
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if (shcore) {
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tSetProcessDpiAwareness* set_dpi_awr = (tSetProcessDpiAwareness*)GetProcAddress(shcore, "SetProcessDpiAwareness");
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if (set_dpi_awr) {
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HRESULT hr = set_dpi_awr(PROCESS_PER_MONITOR_DPI_AWARE);
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ASSERT(SUCCEEDED(hr));
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}
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}
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const wchar_t CLASS_NAME[] = L"Hello!";
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WNDCLASS wc = { };
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wc.lpfnWndProc = WindowProc;
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wc.hInstance = g_hinstance;
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wc.lpszClassName = CLASS_NAME;
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ASSERT(RegisterClass(&wc));
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g_hwnd = CreateWindowEx(
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0, // Optional window styles.
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CLASS_NAME, // Window class
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L"Have a wonderful day!", // Window text
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WS_OVERLAPPEDWINDOW, // Window style
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CW_USEDEFAULT, CW_USEDEFAULT, i.window_x, i.window_y, // Size and position
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NULL, // Parent window
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NULL, // Menu
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g_hinstance, // Instance handle
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NULL // Additional application data
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);
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ASSERT(g_hwnd != 0);
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ShowWindow(g_hwnd, SW_SHOW);
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RECT rect;
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GetWindowRect(g_hwnd, &rect);
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g_window_dc = GetWindowDC(g_hwnd);
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Win32_ScreenInit(rect.right - rect.left, rect.bottom - rect.top);
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}
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bool OS_GameLoop() {
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MSG msg = { };
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while (PeekMessage(&msg, 0, 0, 0, PM_REMOVE) > 0) {
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TranslateMessage(&msg);
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DispatchMessage(&msg);
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}
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// @Note: Free the screen on window resize
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RECT rect;
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GetWindowRect(g_hwnd, &rect);
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int new_width = rect.right - rect.left;
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int new_height = rect.bottom - rect.top;
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if (new_width != screen.x || new_height != screen.y) {
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screen.x = new_width;
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screen.y = new_height;
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if (screen.pixels) {
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screen.pixels = 0;
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free(depth_buffer);
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DeleteDC(g_screen_dc);
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DeleteObject(g_screen_dib);
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}
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}
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// @Note: Create drawable screen
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if (!screen.pixels) {
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Win32_ScreenInit((LONG)screen.x, (LONG)screen.y);
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}
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// @Note; Draw screen to window
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SelectObject(g_screen_dc, g_screen_dib);
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BitBlt(g_window_dc, 0, 0, screen.x, screen.y, g_screen_dc, 0, 0, SRCCOPY);
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Sleep(16);
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return g_app_is_running;
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}
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int main();
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int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PWSTR pCmdLine, int nCmdShow) {
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g_hinstance = hInstance;
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g_cmdshow = nCmdShow;
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return main();
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} |