update

.gitignore

@@ -1,2 +1,3 @@
 /build
 /.vs
+HidCerberus.Lib.log

HidCerberus.Lib.log

@@ -1,6 +0,0 @@
-2024-07-08 21:41:59.339 HidCerberus.Lib:HidGuardianOpen [Information]: Sending add request: http://localhost:26762/api/v1/hidguardian/whitelist/add/7440
-2024-07-09 18:33:47.443 HidCerberus.Lib:HidGuardianOpen [Information]: Sending add request: http://localhost:26762/api/v1/hidguardian/whitelist/add/7156
-2024-07-09 18:33:47.854 HidCerberus.Lib:HidGuardianClose [Information]: Sending remove request: http://localhost:26762/api/v1/hidguardian/whitelist/remove/7156
-2024-07-09 18:34:16.211 HidCerberus.Lib:HidGuardianOpen [Information]: Sending add request: http://localhost:26762/api/v1/hidguardian/whitelist/add/4240
-2024-07-09 18:34:16.316 HidCerberus.Lib:HidGuardianClose [Information]: Sending remove request: http://localhost:26762/api/v1/hidguardian/whitelist/remove/4240
-2024-07-09 18:34:23.477 HidCerberus.Lib:HidGuardianOpen [Information]: Sending add request: http://localhost:26762/api/v1/hidguardian/whitelist/add/7712

misc/build.bat

@@ -1,8 +1,21 @@
 @echo off
 if NOT EXIST .\build mkdir .\build
 pushd .\build
-pwd
+cl ^
-cl -FC -Zi -Fe:handmade.exe ..\src\win32_handmade.cpp user32.lib Gdi32.lib 
+    -MT                                                             %= Make sure the C runtime library is statically linked =%^
+    -Fmwin32_handmade.map                                           %= Create a map file =%^
+    -Gm-                                                            %= Turns off incremently building =%^
+    -nologo                                                         %= No one cares you made the compiler Microsoft =%^
+    -Oi                                                             %= Always use intrinsics  =%^
+    -EHa-                                                           %= Disable exception handling =%^
+    -GR-                                                            %= Never use runtime type info from C++ =%^
+    -WX -W4 -wd4201 -wd4100 -wd4189                                 %= Compiler warnings, -WX warnings as errors, -W4 warning level 4, -wdXXXX disable warning XXXX =%^
+    -DHANDMADE_INTERNAL=1 -DHANDMADE_SLOW=1 -DHANDMADE_WIN32=1      %= Custom #defines =%^
+    -FC                                                             %= Full path of source code file in diagnostics =%^
+    -Zi                                                             %= Generate debugger info =%^
+    -Fe:handmade.exe ..\src\win32_handmade.cpp                      %= Output filename, input filename =%^
+    user32.lib Gdi32.lib                                            %= Linked libraries =%^
+    /link -subsystem:windows,5.1                                    %= Linker stuff =%
 popd
 exit /b
 

misc/shell.bat

@@ -2,4 +2,5 @@
 start "ProconXInput" "C:\Program Files\ProconXInput\ProconXInput.exe"
 call "C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Auxiliary\Build\vcvars64.bat"
 set path=C:\source\repos\handmade\misc;%path%
-cd C:\source\repos\handmade\
+cd C:\source\repos\handmade\
+cmd /k

src/handmade.cpp

@@ -3,7 +3,7 @@
 #define PI32 3.141592653589f
 
 void debug_printf(wchar_t* format, ...) { 
-    int bufsize = wcslen(format)*10;
+    size_t bufsize = wcslen(format)*10;
     wchar_t *output = (wchar_t*)malloc(bufsize);
     va_list list;
     va_start(list, format);
@@ -12,17 +12,16 @@ void debug_printf(wchar_t* format, ...) {
     free(output);
 }
 
-internal void outputSound(GameSoundOutputBuffer *soundBuffer, int toneHz) {
+internal void outputSineSound(GameSoundOutputBuffer *soundBuffer, GameState *state) {
-    local_persist real32 tSine;
     int16 toneVolume = 3000;
-    int wavePeriod = soundBuffer->samplesPerSecond/toneHz;
+    int wavePeriod = soundBuffer->samplesPerSecond/state->toneHz;
 
     int16 *sampleOut = soundBuffer->samples;
     for (int sampleIndex = 0; sampleIndex < soundBuffer->sampleCount; sampleIndex++) {
-        int16 sampleValue = (int16)(sin(tSine) * (real32)toneVolume);
+        int16 sampleValue = (int16)(sin(state->tSine) * (real32)toneVolume);
         *sampleOut++ = sampleValue;
         *sampleOut++ = sampleValue;
-        tSine += 2.0f * PI32 / (real32)wavePeriod;
+        state->tSine += 2.0f * PI32 / (real32)wavePeriod;
     }
 }
 
@@ -33,18 +32,51 @@ internal void renderWeirdGradient(GameOffscreenBuffer *buffer, int xOffset, int
     for (int y = 0; y < buffer->height; y++) {
         uint32 *pixel = (uint32*)row;
         for (int x = 0; x < buffer->width; x++) {
-            uint8 blue = x + xOffset;
+            uint8 blue = (uint8)(x + xOffset);
-            uint8 green = y + yOffset;
+            uint8 green = (uint8)(y + yOffset);
             *pixel++ = (green << 8) | blue;
         }
         row += pitch;
     }
 }
 
-internal void gameUpdateAndRender(GameOffscreenBuffer *videoBuf, GameInput *input, GameSoundOutputBuffer *soundBuf) {
+internal void gameUpdateAndRender(GameMemory *memory, GameOffscreenBuffer *videoBuf, GameInput *input, GameSoundOutputBuffer *soundBuf) {
-    local_persist int greenOffset = 0;
+    Assert(sizeof(GameState) <= memory->permanentStorageSize);
-    local_persist int blueOffset = 0;
+
-    local_persist int toneHz = 440;
+    GameState *state = (GameState*)memory->permanentStorage;
-    outputSound(soundBuf, toneHz);
+
-    renderWeirdGradient(videoBuf, input->xOffset, input->yOffset);
+    if (!memory->isInitialised) {
+        //DebugReadFileResult bmpMem = DEBUG_platformReadEntireFile(__FILE__);
+        //if (bmpMem.contents) {
+        //    DEBUG_platformWriteEntireFile("c:/source/repos/handmade/src/test.cpp", bmpMem.contentsSize, bmpMem.contents);
+        //    DEBUG_platformFreeFileMemory(bmpMem.contents);
+        //}
+
+        state->toneHz = 440;
+        state->tSine = 0;
+        memory->isInitialised = true;
+    }
+
+    for (int controllerIndex = 0; controllerIndex < ArrayCount(input->controllers); controllerIndex++) {
+        GameControllerInput *controllerInput = &input->controllers[controllerIndex];
+        if (controllerInput->isAnalog) {
+            state->toneHz = 440 + (int)(128.0f*controllerInput->stickAvgX);
+            state->greenOffset -= (int)(4.0f*controllerInput->stickAvgX);
+            state->blueOffset += (int)(4.0f*controllerInput->stickAvgY);
+        } else {
+            if (controllerInput->stickRight.endedDown) {
+                state->greenOffset -= 4;
+            } else if (controllerInput->stickLeft.endedDown) {
+                state->greenOffset += 4;
+            } 
+            if (controllerInput->stickUp.endedDown) {
+                state->blueOffset += 4;
+            } else if (controllerInput->stickDown.endedDown) {
+                state->blueOffset -= 4;
+            }
+        }
+    }
+
+    outputSineSound(soundBuf, state);
+    renderWeirdGradient(videoBuf, state->greenOffset, state->blueOffset);
 }

src/handmade.h

@@ -6,6 +6,38 @@
 
 #pragma once
 
+/* 
+ * ---------------
+ *  Global flags: 
+ * ---------------
+ *
+ * HANDMADE_SLOW
+ * 0 - No slow code allowed
+ * 1 - Slow code welcome
+ *
+ * HANDMADE_INTERNAL
+ * 0 - Build for public release
+ * 1 - Build for developer only
+ *
+ * HANDMADE_WIN32
+ * 0 - Not a windows build
+ * 1 - This is a windows build
+ *
+ */
+
+#if HANDMADE_SLOW
+#define Assert(Expression) if (!(Expression)) {*(int *)0 = 0;}
+#else
+#define Assert(Expression) 
+#endif
+
+#define Kilobytes(Value) (Value*1024)
+#define Megabytes(Value) (Kilobytes(Value)*1024)
+#define Gigabytes(Value) (Megabytes(Value)*1024)
+#define Terabytes(Value) (Gigabytes(Value)*1024)
+
+#define ArrayCount(Array) (sizeof(Array) / sizeof((Array)[0]))
+
 #define internal static // for functions
 #define local_persist static // for static variables in a scope
 #define global static // for global variables
@@ -25,14 +57,14 @@ typedef double real64;
 
 typedef int32_t bool32;
 
-void debug_printf(wchar_t* format, ...);
+#define MAX_SAFE_UINT32 0xFFFFFFFF
+
+inline uint32 safeTruncateUInt64(uint64 val) {
+    Assert(val <= MAX_SAFE_UINT32);
+    return (uint32)val;
+}
 
 // Game to platform layer services
-struct GameInput {
-    int xOffset;
-    int yOffset;
-};
-
 struct GameSoundOutputBuffer {
     int samplesPerSecond;
     int sampleCount;
@@ -45,6 +77,69 @@ struct GameOffscreenBuffer {
     int height;
 };
 
-void gameUpdateAndRender(GameOffscreenBuffer *videoBuf, GameInput *input, GameSoundOutputBuffer *soundBuf);
+struct GameButtonState {
+    int halfTransitionCount;
+    bool32 endedDown;
+};
+
+struct GameControllerInput {
+    bool32 isAnalog;
+
+    real32 stickAvgY;
+    real32 stickAvgX;
+
+    union {
+        GameButtonState buttons[6];
+        struct {
+            GameButtonState stickUp;
+            GameButtonState stickDown;
+            GameButtonState stickLeft;
+            GameButtonState stickRight;
+            GameButtonState btnUp;
+            GameButtonState btnDown;
+            GameButtonState btnLeft;
+            GameButtonState btnRight;
+            GameButtonState leftShoulder;
+            GameButtonState rightShoulder;
+        };
+    };
+}; 
+
+struct GameInput {
+    GameControllerInput controllers[5];
+};
+
+struct GameMemory {
+    bool32 isInitialised;
+    uint64 permanentStorageSize;
+    void *permanentStorage; // required to be initialised to zero at startup 
+    uint64 transientStorageSize;
+    void *transientStorage; // required to be initialised to zero at startup 
+};
+
+struct GameState {
+    int toneHz;
+    int greenOffset;
+    int blueOffset;
+    real32 tSine;
+};
+
+// === Game to platform services ===
+void gameUpdateAndRender(GameMemory *memory, GameInput *input, GameOffscreenBuffer *videoBuf, GameSoundOutputBuffer *soundBuf);
+
+// === Platform to game services ===
+#if HANDMADE_INTERNAL
+
+struct DebugReadFileResult {
+    uint32 contentsSize;
+    void *contents;
+};
+
+DebugReadFileResult DEBUG_platformReadEntireFile(char *filename);
+void DEBUG_platformFreeFileMemory(void *memory);
+bool32 DEBUG_platformWriteEntireFile(char *filename, uint32 memorySize, void *memory);
+void debug_printf(wchar_t* format, ...);
+
+#endif
+
 
-// Platform to game services

src/test.cpp

@@ -0,0 +1,86 @@
+#include "handmade.h"
+
+#define PI32 3.141592653589f
+
+void debug_printf(wchar_t* format, ...) { 
+    size_t bufsize = wcslen(format)*10;
+    wchar_t *output = (wchar_t*)malloc(bufsize);
+    va_list list;
+    va_start(list, format);
+    vswprintf(output, bufsize, format, list);
+    OutputDebugStringW(output);
+    free(output);
+}
+
+internal void outputSineSound(GameSoundOutputBuffer *soundBuffer, GameState *state) {
+    int16 toneVolume = 3000;
+    int wavePeriod = soundBuffer->samplesPerSecond/state->toneHz;
+
+    int16 *sampleOut = soundBuffer->samples;
+    for (int sampleIndex = 0; sampleIndex < soundBuffer->sampleCount; sampleIndex++) {
+        int16 sampleValue = (int16)(sin(state->tSine) * (real32)toneVolume);
+        *sampleOut++ = sampleValue;
+        *sampleOut++ = sampleValue;
+        state->tSine += 2.0f * PI32 / (real32)wavePeriod;
+    }
+}
+
+internal void renderWeirdGradient(GameOffscreenBuffer *buffer, int xOffset, int yOffset) {
+    int bytesPerPixel = 4;
+    int pitch = buffer->width*bytesPerPixel;
+    uint8 *row = (uint8 *)buffer->memory;
+    for (int y = 0; y < buffer->height; y++) {
+        uint32 *pixel = (uint32*)row;
+        for (int x = 0; x < buffer->width; x++) {
+            uint8 blue = (uint8)(x + xOffset);
+            uint8 green = (uint8)(y + yOffset);
+            *pixel++ = (green << 8) | blue;
+        }
+        row += pitch;
+    }
+}
+
+internal void gameUpdateAndRender(GameMemory *memory, GameOffscreenBuffer *videoBuf, GameInput *input, GameSoundOutputBuffer *soundBuf) {
+    Assert(sizeof(GameState) <= memory->permanentStorageSize);
+
+    GameState *state = (GameState*)memory->permanentStorage;
+
+    if (!memory->isInitialised) {
+        DebugReadFileResult bmpMem = DEBUG_platformReadEntireFile(__FILE__);
+        if (bmpMem.contents) {
+            DEBUG_platformWriteEntireFile("c:/source/repos/handmade/src/test.cpp", bmpMem.contentsSize, bmpMem.contents);
+            DEBUG_platformFreeFileMemory(bmpMem.contents);
+        }
+
+        state->toneHz = 440;
+        state->tSine = 0;
+        memory->isInitialised = true;
+    }
+
+    for (int controllerIndex = 0; controllerIndex < ArrayCount(input->controllers); controllerIndex++) {
+        GameControllerInput *controllerInput = &input->controllers[controllerIndex];
+        if (controllerInput->isAnalog) {
+            //state->toneHz = 440 + (int)(128.0f*controllerInput->stickAvgX);
+            //state->greenOffset -= (int)(4.0f*controllerInput->stickAvgX);
+            //state->blueOffset += (int)(4.0f*controllerInput->stickAvgY);
+        } else {
+            if (controllerInput->stickRight.endedDown) {
+                state->toneHz = 440 + 128;            
+                state->greenOffset -= 4;
+            } else if (controllerInput->stickLeft.endedDown) {
+                state->toneHz = 440 - 128;            
+                state->greenOffset += 4;
+            } else {
+                state->toneHz = 440;            
+            }
+            if (controllerInput->stickUp.endedDown) {
+                state->blueOffset += 4;
+            } else if (controllerInput->stickDown.endedDown) {
+                state->blueOffset -= 4;
+            }
+        }
+    }
+
+    outputSineSound(soundBuf, state);
+    renderWeirdGradient(videoBuf, state->greenOffset, state->blueOffset);
+}

src/win32_handmade.cpp

@@ -7,7 +7,7 @@
 #include "handmade.cpp"
 
 global ATOM HH_CTRLW;
-global bool running;
+global bool globalRunning;
 global Win32OffscreenBuffer globalBackBuffer;
 global LPDIRECTSOUNDBUFFER globalSecondaryBuffer;
 
@@ -29,6 +29,61 @@ typedef HRESULT WINAPI DirectSoundCreateFn(LPCGUID pcGuidDevice, LPDIRECTSOUND *
 
 #define stackAlloc(size, type) (type*)_alloca(size*sizeof(type))
 
+void DEBUG_platformFreeFileMemory(void *fileMemory) {
+    if (fileMemory) {
+        VirtualFree(fileMemory, NULL, MEM_RELEASE);
+    }
+}
+
+DebugReadFileResult DEBUG_platformReadEntireFile(char *filename) {
+    DebugReadFileResult result = {};
+    HANDLE fileHandle = CreateFileA(filename, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, NULL, NULL);
+    if (fileHandle != INVALID_HANDLE_VALUE) {
+        LARGE_INTEGER fileSize;
+        if (GetFileSizeEx(fileHandle, &fileSize)) {
+            uint32 fileSize32 = safeTruncateUInt64(fileSize.QuadPart);
+            result.contents = VirtualAlloc(NULL, fileSize.QuadPart, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
+            if (result.contents) {
+                DWORD bytesRead;
+                if (ReadFile(fileHandle, result.contents, (DWORD)fileSize.QuadPart, &bytesRead, NULL) && (fileSize32 == (uint32)bytesRead)) {
+                    result.contentsSize = fileSize32;
+                } else {
+                    DEBUG_platformFreeFileMemory(result.contents);
+                    result.contents = NULL;
+                    // logging
+                }
+            } else {
+                result.contents = NULL;
+                // logging
+            }
+        } else {
+            // logging
+        }
+        CloseHandle(fileHandle);
+    } else {
+        // logging
+    }
+    return result;
+}
+
+bool32 DEBUG_platformWriteEntireFile(char *filename, uint32 memorySize, void *memory) {
+    bool32 result = false;
+    HANDLE fileHandle = CreateFileA(filename, GENERIC_WRITE, FILE_SHARE_READ, NULL, CREATE_ALWAYS, NULL, NULL);
+    if (fileHandle != INVALID_HANDLE_VALUE) {
+        DWORD bytesWritten;
+        if (WriteFile(fileHandle, memory, memorySize, &bytesWritten, NULL)) {
+            // file written successfully
+            result = bytesWritten == memorySize;
+        } else {
+            // logging
+        }
+        CloseHandle(fileHandle);
+    } else {
+        // logging
+    }
+    return result;
+}
+
 internal void resizeDIBSection(Win32OffscreenBuffer *buffer, int width, int height) {
     if (buffer->memory) {
         VirtualFree(buffer->memory, NULL, MEM_RELEASE);
@@ -82,6 +137,16 @@ internal void win32LoadXInput() {
     }
 }
 
+internal void win32ProcessKeyboardKeypress(GameButtonState *newState, bool32 isDown) {
+    newState->endedDown = isDown;
+    newState->halfTransitionCount++;
+}
+
+internal void win32ProcessXInputDigitalButton(DWORD xInputButtonState, GameButtonState *oldState, GameButtonState *newState, DWORD buttonBit) {
+    newState->endedDown = (xInputButtonState & buttonBit) == buttonBit;
+    newState->halfTransitionCount = (oldState->endedDown != newState->endedDown) ? 1 : 0;
+}
+
 internal void win32InitSound(HWND window, int32 samplesPerSec, int bufferSize) {
     HMODULE dSoundLibrary = LoadLibraryA("dsound.dll");
     if (dSoundLibrary) {
@@ -145,7 +210,7 @@ LRESULT mainWindowCallback(
         } break;
 
         case WM_CLOSE: {
-            running = false;
+            globalRunning = false;
         } break;
 
         case WM_PAINT: {
@@ -164,7 +229,7 @@ LRESULT mainWindowCallback(
 
         case WM_HOTKEY: {
             if (wParam == HH_CTRLW) {
-                running = false;
+                globalRunning = false;
             }
         } break;
 
@@ -172,29 +237,7 @@ LRESULT mainWindowCallback(
         case WM_SYSKEYUP:
         case WM_KEYUP:
         case WM_KEYDOWN: {
-            uint32 VKCode = wParam;
+            Assert(!"Keyboard input came in through a non-dispatch message.");
-            bool wasDown = (lParam & (1 << 30)) != 0;
-            bool isDown = (lParam & (1 << 31)) == 0;
-            if (wasDown != isDown) {
-                if (VKCode == 'W') {
-                } else if (VKCode == 'A') {
-                } else if (VKCode == 'S') {
-                } else if (VKCode == 'D') {
-                } else if (VKCode == 'Q') {
-                } else if (VKCode == 'E') {
-                } else if (VKCode == VK_ESCAPE) {
-                } else if (VKCode == VK_UP) {
-                } else if (VKCode == VK_LEFT) {
-                } else if (VKCode == VK_DOWN) {
-                } else if (VKCode == VK_RIGHT) {
-                } else if (VKCode == VK_SPACE) {
-                }
-            }
-
-            bool32 altKeyWasDown = lParam & (1 << 29);
-            if (altKeyWasDown && VKCode == VK_F4) {
-                running = false;
-            }
         } break;
 
         default: {
@@ -253,6 +296,61 @@ internal void win32FillSoundBuffer(Win32SoundOutput *soundOutput, DWORD byteToLo
     }
 }
 
+internal void win32ProcessPendingMessages(GameControllerInput *keyboardController) {
+    MSG message;
+    while (PeekMessageA(&message, NULL, NULL, NULL, PM_REMOVE)) {
+        if (message.message == WM_QUIT) {
+            globalRunning = false;
+        }
+
+        switch (message.message) {
+            case WM_SYSKEYDOWN:
+            case WM_SYSKEYUP:
+            case WM_KEYUP:
+            case WM_KEYDOWN: {
+                uint32 VKCode = (uint32)message.wParam;
+                bool wasDown = (message.lParam & (1 << 30)) != 0;
+                bool isDown = (message.lParam & (1 << 31)) == 0;
+                if (wasDown != isDown) {
+                    if (VKCode == 'W') {
+                        win32ProcessKeyboardKeypress(&keyboardController->stickUp, isDown);
+                    } else if (VKCode == 'A') {
+                        win32ProcessKeyboardKeypress(&keyboardController->stickLeft, isDown);
+                    } else if (VKCode == 'S') {
+                        win32ProcessKeyboardKeypress(&keyboardController->stickDown, isDown);
+                    } else if (VKCode == 'D') {
+                        win32ProcessKeyboardKeypress(&keyboardController->stickRight, isDown);
+                    } else if (VKCode == 'Q') {
+                        win32ProcessKeyboardKeypress(&keyboardController->leftShoulder, isDown);
+                    } else if (VKCode == 'E') {
+                        win32ProcessKeyboardKeypress(&keyboardController->rightShoulder, isDown);
+                    } else if (VKCode == VK_ESCAPE) {
+                    } else if (VKCode == VK_UP) {
+                        win32ProcessKeyboardKeypress(&keyboardController->btnUp, isDown);
+                    } else if (VKCode == VK_LEFT) {
+                        win32ProcessKeyboardKeypress(&keyboardController->btnLeft, isDown);
+                    } else if (VKCode == VK_DOWN) {
+                        win32ProcessKeyboardKeypress(&keyboardController->btnDown, isDown);
+                    } else if (VKCode == VK_RIGHT) {
+                        win32ProcessKeyboardKeypress(&keyboardController->btnRight, isDown);
+                    } else if (VKCode == VK_SPACE) {
+                    }
+                }
+
+                bool32 altKeyWasDown = message.lParam & (1 << 29);
+                if (altKeyWasDown && VKCode == VK_F4) {
+                    globalRunning = false;
+                }
+            } break;
+
+            default: {
+                TranslateMessage(&message);
+                DispatchMessage(&message);
+            } break;
+        }
+    }
+}
+
 int APIENTRY WinMain(HINSTANCE instance, HINSTANCE prevInstance, PSTR commandLine, int commandShow) {
     LARGE_INTEGER performanceFrequencyResult;
     QueryPerformanceFrequency(&performanceFrequencyResult);
@@ -285,26 +383,36 @@ int APIENTRY WinMain(HINSTANCE instance, HINSTANCE prevInstance, PSTR commandLin
             HH_CTRLW = GlobalAddAtomA("HH_CTRLW");
             RegisterHotKey(window, HH_CTRLW, MOD_CONTROL, 'W');
 
-            MSG message;
+            globalRunning = true;
-            running = true;
+            GameInput input[2] = {};
+            GameInput *oldInput = &input[0];
+            GameInput *newInput = &input[1];
 
             win32LoadXInput();
 
-            // graphics test
-            int xOffset = 0;
-            int yOffset = 0;
-
             // sound test
             Win32SoundOutput soundOutput = {};
             soundOutput.samplesPerSecond = 48000;
-            soundOutput.wavePeriod = soundOutput.samplesPerSecond / soundOutput.toneHz;
             soundOutput.runningSampleIndex = 0;
             soundOutput.bytesPerSample = sizeof(int16)*2;
             soundOutput.secondaryBufferSize = soundOutput.samplesPerSecond*soundOutput.bytesPerSample;
-            soundOutput.latencySampleCount = soundOutput.samplesPerSecond / 15.0f;
+            soundOutput.latencySampleCount = (int)(soundOutput.samplesPerSecond / 15.0f);
 
             int16 *samples = (int16*)VirtualAlloc(NULL, soundOutput.secondaryBufferSize, MEM_COMMIT, PAGE_READWRITE);
 
+#if HANDMADE_INTERNAL
+            LPVOID baseAddress = (LPVOID)Terabytes((uint64)2);
+#else
+            LPVOID baseAddress = 0;
+#endif
+            GameMemory gameMemory = {};
+            gameMemory.permanentStorageSize = Megabytes(64);
+            gameMemory.transientStorageSize = Gigabytes((uint64)4);
+
+            uint64 totalSize = gameMemory.permanentStorageSize + gameMemory.transientStorageSize;
+            gameMemory.permanentStorage = VirtualAlloc(baseAddress, totalSize, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
+            gameMemory.transientStorage = ((uint8 *)gameMemory.permanentStorage + gameMemory.permanentStorageSize);
+
             win32InitSound(window, soundOutput.samplesPerSecond, soundOutput.secondaryBufferSize);
             win32ClearBuffer(&soundOutput);
             globalSecondaryBuffer->Play(0, 0, DSBPLAY_LOOPING);
@@ -312,70 +420,90 @@ int APIENTRY WinMain(HINSTANCE instance, HINSTANCE prevInstance, PSTR commandLin
             LARGE_INTEGER lastCounter;
             QueryPerformanceCounter(&lastCounter);
             int64 lastCycleCount = __rdtsc();
-            while (running) {
+            while (globalRunning) {
-                while (PeekMessageA(&message, NULL, NULL, NULL, PM_REMOVE)) {
+                GameControllerInput *oldKeyboardController = &oldInput->controllers[0];
-                    if (message.message == WM_QUIT) {
+                GameControllerInput *newKeyboardController = &newInput->controllers[0];
-                        running = false;
+                GameControllerInput zeroController = {};
-                    }
+                *newKeyboardController = zeroController;
-                    TranslateMessage(&message);
+                for (int buttonIndex = 0; buttonIndex < ArrayCount(oldKeyboardController->buttons); buttonIndex++) {
-                    DispatchMessage(&message);
+                    newKeyboardController->buttons[buttonIndex].endedDown = oldKeyboardController->buttons[buttonIndex].endedDown;
                 }
 
+                win32ProcessPendingMessages(newKeyboardController);
+
                 XINPUT_STATE controllerState;
+                int maxControllerCount = 1 + XUSER_MAX_COUNT;
+                if (maxControllerCount > ArrayCount(newInput->controllers)) {
+                    maxControllerCount = ArrayCount(newInput->controllers);
+                }
+
                 for (DWORD controllerIndex = 0; controllerIndex < XUSER_MAX_COUNT; controllerIndex++) {
                     if (XInputGetState(controllerIndex, &controllerState) == ERROR_SUCCESS) {
-                        break;
+                        DWORD ourControllerIndex = controllerIndex + 1;
+                        GameControllerInput *oldController = &oldInput->controllers[ourControllerIndex];
+                        GameControllerInput *newController = &newInput->controllers[ourControllerIndex];
+
+                        newController->isAnalog = true;
+
+                        XINPUT_GAMEPAD *pad = &controllerState.Gamepad;
+
+                        int16 stickX = pad->sThumbLX;
+                        int16 stickY = pad->sThumbLY;
+                        real32 stickYNorm = 0;
+                        real32 stickXNorm = 0;
+                        if (stickY != 0 && abs(stickY) > XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE) {
+                            stickYNorm = stickY / 32767.0f;
+                        }
+                        if (stickX != 0 && abs(stickX) > XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE) {
+                            stickXNorm = stickX / 32767.0f;
+                        }
+
+                        newController->stickAvgX = stickXNorm;
+                        newController->stickAvgY = stickYNorm;
+                        if (pad->wButtons & XINPUT_GAMEPAD_DPAD_UP) {
+                            newController->stickAvgY = 1.0f;
+                        }
+                        if (pad->wButtons & XINPUT_GAMEPAD_DPAD_DOWN) {
+                            newController->stickAvgY = -1.0f;
+                        }
+                        if (pad->wButtons & XINPUT_GAMEPAD_DPAD_LEFT) {
+                            newController->stickAvgX = -1.0f;
+                        }
+                        if (pad->wButtons & XINPUT_GAMEPAD_DPAD_RIGHT) {
+                            newController->stickAvgX = 1.0f;
+                        }
+
+                        //bool start = (pad->wButtons & XINPUT_GAMEPAD_START);
+                        //bool back = (pad->wButtons & XINPUT_GAMEPAD_BACK);
+
+                        win32ProcessXInputDigitalButton(pad->wButtons, &oldController->btnDown, &newController->btnDown, XINPUT_GAMEPAD_A);
+                        win32ProcessXInputDigitalButton(pad->wButtons, &oldController->btnRight, &newController->btnRight, XINPUT_GAMEPAD_B);
+                        win32ProcessXInputDigitalButton(pad->wButtons, &oldController->btnLeft, &newController->btnLeft, XINPUT_GAMEPAD_X);
+                        win32ProcessXInputDigitalButton(pad->wButtons, &oldController->btnUp, &newController->btnUp, XINPUT_GAMEPAD_Y);
+                        win32ProcessXInputDigitalButton(pad->wButtons, &oldController->leftShoulder, &newController->leftShoulder, XINPUT_GAMEPAD_LEFT_SHOULDER);
+                        win32ProcessXInputDigitalButton(pad->wButtons, &oldController->rightShoulder, &newController->rightShoulder, XINPUT_GAMEPAD_RIGHT_SHOULDER);
+
+                        real32 threshold = 0.5f;
+                        win32ProcessXInputDigitalButton((DWORD)(newController->stickAvgY < -threshold), &oldController->stickDown, &newController->stickDown, 1);
+                        win32ProcessXInputDigitalButton((DWORD)(newController->stickAvgX > threshold), &oldController->stickRight, &newController->stickRight, 1);
+                        win32ProcessXInputDigitalButton((DWORD)(newController->stickAvgX < -threshold), &oldController->stickLeft, &newController->stickLeft, 1);
+                        win32ProcessXInputDigitalButton((DWORD)(newController->stickAvgY > threshold), &oldController->stickUp, &newController->stickUp, 1);
                     } else {
                         // controller not available
                     }
                 }
-                XINPUT_GAMEPAD *Pad = &controllerState.Gamepad;
-                bool up = (Pad->wButtons & XINPUT_GAMEPAD_DPAD_UP);
-                bool down = (Pad->wButtons & XINPUT_GAMEPAD_DPAD_DOWN);
-                bool left = (Pad->wButtons & XINPUT_GAMEPAD_DPAD_LEFT);
-                bool right = (Pad->wButtons & XINPUT_GAMEPAD_DPAD_RIGHT);
-                bool start = (Pad->wButtons & XINPUT_GAMEPAD_START);
-                bool back = (Pad->wButtons & XINPUT_GAMEPAD_BACK);
-                bool leftShoulder = (Pad->wButtons & XINPUT_GAMEPAD_LEFT_SHOULDER);
-                bool rightShoulder = (Pad->wButtons & XINPUT_GAMEPAD_RIGHT_SHOULDER);
-                bool aButton = (Pad->wButtons & XINPUT_GAMEPAD_A);
-                bool bButton = (Pad->wButtons & XINPUT_GAMEPAD_B);
-                bool xButton = (Pad->wButtons & XINPUT_GAMEPAD_X);
-                bool yButton = (Pad->wButtons & XINPUT_GAMEPAD_Y);
-                int16 stickX = Pad->sThumbLX;
-                int16 stickY = Pad->sThumbLY;
-
-                float stickYNorm = 0;
-                float stickXNorm = 0;
-                if (stickY != 0 && abs(stickY) > XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE) {
-                    stickYNorm = stickY / 32767.0;
-                }
-                if (stickX != 0 && abs(stickX) > XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE) {
-                    stickXNorm = stickX / 32767.0;
-                }
-
-                float factor = leftShoulder ? 2.5 : 1.0;
-                yOffset += stickY/5000.0 * factor;
-                xOffset -= stickX/5000.0 * factor;
-
-                soundOutput.toneHz = 220 + (stickYNorm + 1.0)/2.0 * 220.0;
-                soundOutput.wavePeriod = soundOutput.samplesPerSecond / soundOutput.toneHz;
 
                 GameOffscreenBuffer videoBuffer = {};
                 videoBuffer.memory = globalBackBuffer.memory;
                 videoBuffer.width = globalBackBuffer.width;
                 videoBuffer.height = globalBackBuffer.height;
 
-                GameInput input = {};
-                input.xOffset = xOffset;
-                input.yOffset = yOffset;
-
                 // Sound test
-                DWORD playCursor;
+                DWORD playCursor = 0;
-                DWORD writeCursor;
+                DWORD writeCursor = 0;
-                DWORD byteToLock;
+                DWORD byteToLock = 0;
-                DWORD targetCursor;
+                DWORD targetCursor = 0;
-                DWORD bytesToWrite;
+                DWORD bytesToWrite = 0;
                 bool soundIsValid = true;
                 if (SUCCEEDED(globalSecondaryBuffer->GetCurrentPosition(&playCursor, &writeCursor))) {
                     byteToLock = (soundOutput.runningSampleIndex*soundOutput.bytesPerSample) % soundOutput.secondaryBufferSize;
@@ -395,7 +523,7 @@ int APIENTRY WinMain(HINSTANCE instance, HINSTANCE prevInstance, PSTR commandLin
                 soundBuffer.sampleCount = bytesToWrite / soundOutput.bytesPerSample;
                 soundBuffer.samples = samples;
 
-                gameUpdateAndRender(&videoBuffer, &input, &soundBuffer);
+                gameUpdateAndRender(&gameMemory, &videoBuffer, newInput, &soundBuffer);
 
                 if (soundIsValid) {
                     win32FillSoundBuffer(&soundOutput, byteToLock, bytesToWrite, &soundBuffer);
@@ -405,14 +533,18 @@ int APIENTRY WinMain(HINSTANCE instance, HINSTANCE prevInstance, PSTR commandLin
                 LARGE_INTEGER endCounter;
                 QueryPerformanceCounter(&endCounter);
                 int64 endCycleCount = __rdtsc();
-                int32 cyclesElapsed = endCycleCount - lastCycleCount;
+                int64 cyclesElapsed = endCycleCount - lastCycleCount;
                 lastCycleCount = endCycleCount;
 
                 int64 counterElapsed = endCounter.QuadPart - lastCounter.QuadPart;
                 real32 msElapsed = (real32)(1000.0f*counterElapsed) / performanceFrequency;
                 real32 fps = (real32)(1000.0f*performanceFrequency/(real32)counterElapsed)/1000.0f;
-                debug_printf(L"%f ms, %f fps, %f Mcl, %fGHz\n", msElapsed, fps, cyclesElapsed / 1000000.0f, (cyclesElapsed/(msElapsed*1000))/1000000.0f);
+
                 lastCounter = endCounter;
+
+                GameInput *temp = newInput;
+                newInput = oldInput; 
+                oldInput = temp;
             }
         } else {
             // failed

src/win32_handmade.h

@@ -0,0 +1,24 @@
+#include "handmade.h"
+
+struct Win32OffscreenBuffer {
+    BITMAPINFO info;
+    void *memory;
+    int width;
+    int height;
+    int bytesPerPixel;
+};
+
+struct Win32WindowDimensions {
+    int width;
+    int height;
+};
+
+struct Win32SoundOutput {
+    int samplesPerSecond;
+    int16 toneVolume;
+    uint32 runningSampleIndex;
+    int bytesPerSample;
+    int secondaryBufferSize;
+    real32 tSine;
+    int latencySampleCount;
+};