simplify - only need DispatchMessageW and WM_CHAR actually - no need for vsync - handle surrogate pairs
parent
ac13615d64
commit
6681cddf72
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@ -1,6 +1,6 @@
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@echo off
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set libs=User32.lib Dwmapi.lib Gdi32.lib
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set libs=User32.lib Gdi32.lib
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set opts=-FC -GR- -EHa- -nologo -Zi
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set code=%cd%
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@ -1,6 +1,6 @@
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/*
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** Win32 Typing Test Program
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** v1.0.0 - Jan 19th 2024
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** v1.1.0 - Jan 19th 2024
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** by Allen Webster allenw@mr4th.com
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**
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** public domain example program
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@ -8,7 +8,7 @@
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**
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**
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** Tested on:
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** Windows 10 English
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** Windows 10 (English, Latvian, Emojis)
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**
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** This is an example and a tool for gathering information about
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** Win32 text input APIs.
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@ -25,9 +25,6 @@
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#include <Windows.h>
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// only for vsync in GDI
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#include <dwmapi.h>
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typedef LONG S32;
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typedef USHORT U16;
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typedef ULONG U32;
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@ -47,6 +44,9 @@ static void AppTypeCodepoint(U32 cp);
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static BOOL keep_running = 1;
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static WCHAR lo_surrogate = 0;
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static WCHAR hi_surrogate = 0;
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static LRESULT
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WindowProc(HWND wnd,
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UINT msg,
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@ -55,51 +55,53 @@ WindowProc(HWND wnd,
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LRESULT result = 0;
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switch (msg){
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case WM_PAINT:
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{
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PAINTSTRUCT ps;
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BeginPaint(wnd, &ps);
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AppRender(wnd);
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EndPaint(wnd, &ps);
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}break;
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case WM_CHAR:
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{
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// When a user uses IME, their input is handled by
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// WM_IME_CHAR messages, but additional WM_CHAR messages
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// get generated in the process.
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// When a WM_CHAR generally represents text input that
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// should be inserted, but there are a few twists.
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//
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// I'm not entirely sure what the best thing is to do with
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// them - but they appear to always be messages I want to ignore.
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// Sometimes WM_CHAR is triggered by controls that are
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// not text input, like Ctrl + Letter. To filter out
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// these cases we ignore values less than ' ' (0x20)
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// and the value 0x7F. See WM_KEYDOWN for a little
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// more on this issue.
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//
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// They also appear to be the only case where a WM_CHAR
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// message has a scan code of zero.
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// When the user types a character that does not fit
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// in a single U16, a pair of WM_CHAR messages are sent.
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// Each WM_CHAR message in the pair contains a
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// "surrogate" (defined by UTF16) one "high" surrogate
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// followed by a "low" surrogate. A pair of surrogates
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// translates into a single typed codepoint.
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//
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// Therefore my best solution so far is to filter out WM_CHAR
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// messages that have a zero scan code.
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// (Actually the docs don't clearly say one order
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// or the other - I just support both)
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U32 scan_code = ((lparam >> 16) & 0xFF);
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if (scan_code != 0){
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U32 cp16 = (wparam & 0xFFFF);
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if (cp16 >= ' ' && cp16 != 0x7F){
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AppTypeCodepoint(cp16);
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}
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}
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}break;
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U32 c = (wparam & 0xFFFF);
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if (c >= ' ' && c != 0x7F){
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case WM_IME_CHAR:
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{
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U32 cp16 = (wparam & 0xFFFF);
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if (cp16 >= ' ' && cp16 != 0x7F){
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AppTypeCodepoint(cp16);
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if (IS_LOW_SURROGATE(c)){
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lo_surrogate = c;
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}
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else if (IS_HIGH_SURROGATE(c)){
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hi_surrogate = c;
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}
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else{
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AppTypeCodepoint(c);
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lo_surrogate = 0;
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hi_surrogate = 0;
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}
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if (hi_surrogate != 0 && lo_surrogate != 0){
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if (IS_SURROGATE_PAIR(hi_surrogate, lo_surrogate)){
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U32 cp = (0x10000 +
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((hi_surrogate & 0x3FF) << 10) +
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(lo_surrogate & 0x3FF) );
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AppTypeCodepoint(cp);
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}
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hi_surrogate = 0;
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lo_surrogate = 0;
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}
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}break;
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case WM_UNICHAR:
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{
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U32 cp32 = wparam;
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if (cp32 >= ' ' && cp32 != 0x7F){
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AppTypeCodepoint(cp32);
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}
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}break;
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@ -143,6 +145,14 @@ WindowProc(HWND wnd,
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}
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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(wnd, &ps);
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AppRender(wnd);
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EndPaint(wnd, &ps);
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}break;
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case WM_CLOSE:
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{
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keep_running = 0;
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@ -158,6 +168,63 @@ WindowProc(HWND wnd,
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}
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////////////////////////////////
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// Main
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static BOOL composition_enabled = 0;
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int
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WinMain(HINSTANCE hInstance,
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HINSTANCE hPrevInstance,
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LPSTR lpCmdLine,
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int nShowCmd){
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WNDCLASSW window_class = {0};
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window_class.style = CS_HREDRAW|CS_VREDRAW;
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window_class.lpfnWndProc = WindowProc;
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window_class.hInstance = hInstance;
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window_class.hCursor = LoadCursorA(0, IDC_ARROW);
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window_class.lpszClassName = L"WindowClass";
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ATOM atom = RegisterClassW(&window_class);
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if (atom == 0){
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MessageBoxW(0, (WCHAR*)L"RegisterClassW failed\n", (WCHAR*)L"Fatal", MB_OK);
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ExitProcess(1);
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}
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DWORD style = WS_OVERLAPPEDWINDOW;
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HWND wnd = CreateWindowW(L"WindowClass", L"Type Test", style,
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CW_USEDEFAULT, CW_USEDEFAULT,
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CW_USEDEFAULT, CW_USEDEFAULT,
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0, 0, hInstance, 0);
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// init
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AppInit(wnd);
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// main loop
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ShowWindow(wnd, SW_SHOW);
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keep_running = 1;
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for (;keep_running;){
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// Handle Message Queue
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BOOL wait = 1;
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MSG msg;
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for (;(wait?GetMessageW(&msg, 0, 0, 0):
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PeekMessageW(&msg, 0, 0, 0, PM_REMOVE));){
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wait = 0;
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TranslateMessage(&msg);
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DispatchMessageW(&msg);
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}
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// render
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AppRender(wnd);
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// sleep
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Sleep(33);
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}
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}
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////////////////////////////////
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// App Implementation
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@ -271,79 +338,4 @@ AppRender(HWND wnd){
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}
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////////////////////////////////
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// Main
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static BOOL composition_enabled = 0;
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int
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WinMain(HINSTANCE hInstance,
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HINSTANCE hPrevInstance,
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LPSTR lpCmdLine,
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int nShowCmd){
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// window setup
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#define WINDOW_CLASS L"InputWindowClass"
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WNDCLASSW window_class = {0};
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window_class.style = CS_HREDRAW|CS_VREDRAW;
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window_class.lpfnWndProc = WindowProc;
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window_class.hInstance = hInstance;
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window_class.hCursor = LoadCursorA(0, IDC_ARROW);
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window_class.lpszClassName = WINDOW_CLASS;
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ATOM atom = RegisterClassW(&window_class);
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if (atom == 0){
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MessageBoxW(0, (WCHAR*)L"RegisterClassW failed\n", (WCHAR*)L"Fatal", MB_OK);
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ExitProcess(1);
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}
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DWORD style = WS_OVERLAPPEDWINDOW;
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HWND wnd = CreateWindowW(WINDOW_CLASS, L"Type Test", style,
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CW_USEDEFAULT, CW_USEDEFAULT,
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CW_USEDEFAULT, CW_USEDEFAULT,
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0, 0, hInstance, 0);
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// setup vsync
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if (DwmIsCompositionEnabled(&composition_enabled) != S_OK){
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composition_enabled = 0;
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}
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if (!composition_enabled){
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MessageBoxW(0, (WCHAR*)L"No Vsync\n", (WCHAR*)L"Issue", MB_OK);
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}
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// init
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AppInit(wnd);
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// main loop
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ShowWindow(wnd, SW_SHOW);
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keep_running = 1;
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for (;keep_running;){
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// flush message queue
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{
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BOOL wait_for_message = 1;
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MSG msg;
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for (;(wait_for_message?
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GetMessageW(&msg, 0, 0, 0):
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PeekMessageW(&msg, 0, 0, 0, PM_REMOVE));){
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wait_for_message = 0;
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TranslateMessage(&msg);
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DispatchMessage(&msg);
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}
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}
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// render
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AppRender(wnd);
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// vsync or sleep
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if (composition_enabled){
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DwmFlush();
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}
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else{
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Sleep(33);
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}
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}
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}
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//$ graphical //
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Loading…
Reference in New Issue