366 lines
8.4 KiB
C++
366 lines
8.4 KiB
C++
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/*
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* 4tech reusable win32 layer
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* by Allen Webster
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* 08.20.2015
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*
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*/
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// TOP
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#include <Windows.h>
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#include <Windowsx.h>
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struct Win32{
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HWND hwnd;
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HDC dc;
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bool keep_playing;
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Memory memory;
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Render_Target render_target;
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Mouse_State mouse, previous_mouse;
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HCURSOR cursor_ibeam;
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HCURSOR cursor_arrow;
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HCURSOR cursor_leftright;
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HCURSOR cursor_updown;
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#if RENDER_MODE == OPENGL_RENDER
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HGLRC glcontext;
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#endif
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};
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global Win32 win32;
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internal void
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win32_debug(char *msg){
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MessageBox(win32.hwnd,
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msg,
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"debug out",
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MB_OK);
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}
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#if RENDER_MODE == OPENGL_RENDER
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internal void
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win32_screen_init(){
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PIXELFORMATDESCRIPTOR format;
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int format_id;
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BOOL success;
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format.nSize = sizeof(format);
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format.nVersion = 1;
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format.dwFlags = PFD_SUPPORT_OPENGL | PFD_DRAW_TO_WINDOW | PFD_DOUBLEBUFFER;
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format.iPixelType = PFD_TYPE_RGBA;
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format.cColorBits = 32;
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format.cRedBits = 0;
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format.cRedShift = 0;
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format.cGreenBits = 0;
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format.cGreenShift = 0;
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format.cBlueBits = 0;
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format.cBlueShift = 0;
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format.cAlphaBits = 0;
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format.cAlphaShift = 0;
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format.cAccumBits = 0;
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format.cAccumRedBits = 0;
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format.cAccumGreenBits = 0;
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format.cAccumBlueBits = 0;
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format.cAccumAlphaBits = 0;
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format.cDepthBits = 16;
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format.cStencilBits = 0;
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format.cAuxBuffers = 0;
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format.iLayerType = PFD_MAIN_PLANE;
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format.bReserved = 0;
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format.dwLayerMask = 0;
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format.dwVisibleMask = 0;
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format.dwDamageMask = 0;
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win32.dc = GetDC(win32.hwnd);
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_Assert(win32.dc);
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format_id = ChoosePixelFormat(win32.dc, &format);
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_Assert(format_id != 0);
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success = SetPixelFormat(win32.dc, format_id, &format);
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_Assert(success == TRUE);
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win32.glcontext = wglCreateContext(win32.dc);
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wglMakeCurrent(win32.dc, win32.glcontext);
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glEnable(GL_SCISSOR_TEST);
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glEnable(GL_BLEND);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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glClearColor(0,0,0,0);
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glFlush();
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SwapBuffers(win32.dc);
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ShowWindow(win32.hwnd, SW_SHOW);
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}
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internal void
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win32_resize_screen(i32 w, i32 h){
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if (w > 0 && h > 0){
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glViewport(0, 0, w, h);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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glOrtho(0, w, h, 0, -1, 1);
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity();
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glScissor(0, 0, w, h);
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win32.render_target.w = w;
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win32.render_target.h = h;
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}
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}
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internal void
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win32_redraw_screen(){
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glFlush();
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SwapBuffers(win32.dc);
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}
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internal void
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win32_screen_free(){
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wglMakeCurrent(0, 0);
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wglDeleteContext(win32.glcontext);
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}
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#endif
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internal void
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win32_track_leave(){
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TRACKMOUSEEVENT track;
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track.cbSize = sizeof(track);
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track.dwFlags = TME_LEAVE;
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track.hwndTrack = win32.hwnd;
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TrackMouseEvent(&track);
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}
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internal u64
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win32_get_time(){
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LARGE_INTEGER time;
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QueryPerformanceCounter(&time);
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return time.QuadPart;
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}
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LRESULT ColorWindowProc(
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HWND hwnd,
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UINT uMsg,
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WPARAM wParam,
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LPARAM lParam){
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LRESULT result = {};
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switch (uMsg){
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case WM_SIZE:
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{
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i32 w = LOWORD(lParam);
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i32 h = HIWORD(lParam);
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win32_resize_screen(w, h);
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}break;
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case WM_PAINT:
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{
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PAINTSTRUCT ps;
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BeginPaint(hwnd, &ps);
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App_Step_Data step;
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step.memory = win32.memory;
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step.render_target = win32.render_target;
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step.mouse = win32.mouse;
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App_Step_Out step_out = {};
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app_step(&step, &step_out);
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win32_redraw_screen();
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EndPaint(hwnd, &ps);
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}break;
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case WM_CLOSE:
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case WM_DESTROY:
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{
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win32.keep_playing = 0;
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}break;
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case WM_SYSKEYDOWN:
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case WM_SYSKEYUP:
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case WM_KEYDOWN:
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case WM_KEYUP:
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{
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}break;
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case WM_LBUTTONDOWN:
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{
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win32.mouse.l = 1;
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}break;
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case WM_RBUTTONDOWN:
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{
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win32.mouse.r = 1;
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}break;
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case WM_LBUTTONUP:
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{
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win32.mouse.l = 0;
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}break;
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case WM_RBUTTONUP:
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{
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win32.mouse.r = 0;
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}break;
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case WM_MOUSEMOVE:
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{
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win32.mouse.x = GET_X_LPARAM(lParam);
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win32.mouse.y = GET_Y_LPARAM(lParam);
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win32.mouse.in_window = 1;
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win32_track_leave();
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}break;
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case WM_MOUSEWHEEL:
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{
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win32.mouse.wheel = GET_WHEEL_DELTA_WPARAM(wParam);
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}break;
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case WM_MOUSELEAVE:
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{
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win32.mouse.in_window = 0;
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}break;
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case WM_KILLFOCUS:
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{
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win32.mouse = {};
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}break;
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default:
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{
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result = DefWindowProc(hwnd, uMsg, wParam, lParam);
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}break;
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}
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return result;
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}
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int
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WinMain(
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HINSTANCE hInstance,
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HINSTANCE hPrevInstance,
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LPSTR lpCmdLine,
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int nCmdShow){
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win32 = {};
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WNDCLASSEX winclass;
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winclass.cbSize = sizeof(WNDCLASSEX);
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winclass.style = CS_OWNDC | CS_HREDRAW | CS_VREDRAW;
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winclass.lpfnWndProc = ColorWindowProc;
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winclass.cbClsExtra = 0;
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winclass.cbWndExtra = 0;
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winclass.hInstance = hInstance;
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winclass.hIcon = 0;
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winclass.hCursor = 0;
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winclass.hbrBackground = 0;
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winclass.lpszMenuName = 0;
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winclass.lpszClassName = "color-class";
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winclass.hIconSm = 0;
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ATOM register_result = RegisterClassEx(&winclass);
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_Assert(register_result);
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i32 w, h;
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w = 800;
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h = 600;
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RECT window_rect;
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window_rect.left = 0;
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window_rect.top = 0;
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window_rect.right = w;
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window_rect.bottom = h;
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AdjustWindowRect(&window_rect, WS_OVERLAPPEDWINDOW, 0);
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HWND hwnd =
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CreateWindowEx(0,
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"color-class",
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"4tech colors",
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WS_OVERLAPPEDWINDOW,
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CW_USEDEFAULT,
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CW_USEDEFAULT,
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window_rect.right - window_rect.left,
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window_rect.bottom - window_rect.top,
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0,
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0,
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hInstance,
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0);
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_Assert(hwnd);
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win32.hwnd = hwnd;
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win32.dc = GetDC(win32.hwnd);
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win32_screen_init();
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GetClientRect(win32.hwnd, &window_rect);
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win32_resize_screen(window_rect.right - window_rect.left,
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window_rect.bottom - window_rect.top);
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win32.memory.size = Mbytes(1);
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win32.memory.mem = VirtualAlloc((LPVOID)Tbytes(2),
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win32.memory.size,
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MEM_RESERVE|MEM_COMMIT,
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PAGE_READWRITE);
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_Assert(win32.memory.mem);
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win32.cursor_ibeam = LoadCursor(NULL, IDC_IBEAM);
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win32.cursor_arrow = LoadCursor(NULL, IDC_ARROW);
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win32.cursor_leftright = LoadCursor(NULL, IDC_SIZEWE);
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win32.cursor_updown = LoadCursor(NULL, IDC_SIZENS);
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u64 frame_target = MILLION / 30;
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u64 frame_start, frame_end;
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u64 frame_used;
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timeBeginPeriod(1);
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win32.keep_playing = 1;
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frame_start = win32_get_time();
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while (win32.keep_playing){
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MSG msg;
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win32.previous_mouse = win32.mouse;
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while (PeekMessage(&msg,
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0,0,0,
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PM_REMOVE)){
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TranslateMessage(&msg);
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DispatchMessage(&msg);
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}
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win32.mouse.pl = win32.mouse.l && !win32.previous_mouse.l;
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win32.mouse.pr = win32.mouse.r && !win32.previous_mouse.r;
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App_Step_Data step;
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step.memory = win32.memory;
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step.render_target = win32.render_target;
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step.mouse = win32.mouse;
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App_Step_Out step_out = {};
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app_step(&step, &step_out);
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win32_redraw_screen();
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switch (step_out.mouse_cursor){
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case APP_MOUSE_CURSOR_IBEAM:
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SetCursor(win32.cursor_ibeam);
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break;
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case APP_MOUSE_CURSOR_ARROW:
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SetCursor(win32.cursor_arrow);
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break;
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case APP_MOUSE_CURSOR_LEFTRIGHT:
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SetCursor(win32.cursor_leftright);
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break;
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case APP_MOUSE_CURSOR_UPDOWN:
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SetCursor(win32.cursor_updown);
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break;
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}
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frame_end = win32_get_time();
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frame_used = frame_end - frame_start;
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if (frame_used < frame_target){
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Sleep((DWORD)(frame_target - frame_used) / 1000);
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}
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frame_start = win32_get_time();
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}
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return 0;
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}
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// BOTTOM
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