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Ledda
2024-07-08 22:41:44 +01:00
parent 715f86763c
commit 82ddd12239
6 changed files with 114 additions and 65 deletions
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src/win32_handmade.cpp Normal file
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// Windows and Windows DLLs
#include <windows.h>
#include <Xinput.h>
#include <dsound.h>
#include "handmade.cpp"
struct Win32OffscreenBuffer {
BITMAPINFO info;
void *memory;
int width;
int height;
int bytesPerPixel;
};
struct Win32WindowDimensions {
int width;
int height;
};
#define PI32 3.141592653589f
global ATOM HH_CTRLW;
global bool running;
global Win32OffscreenBuffer globalBackBuffer;
global LPDIRECTSOUNDBUFFER globalSecondaryBuffer;
// XInputGetState
#define X_INPUT_GET_STATE(name) DWORD WINAPI name(DWORD dwUserIndex, XINPUT_STATE *pState)
typedef X_INPUT_GET_STATE(XInputGetStateFn);
X_INPUT_GET_STATE(XInputGetStateStub) { return ERROR_DEVICE_NOT_CONNECTED; }
global XInputGetStateFn *XInputGetStateDyn = XInputGetStateStub;
#define XInputGetState XInputGetStateDyn
// XInputSetState
#define X_INPUT_SET_STATE(name) DWORD WINAPI name(DWORD dwUserIndex, XINPUT_VIBRATION *pVibration)
typedef X_INPUT_SET_STATE(XInputSetStateFn);
X_INPUT_SET_STATE(XInputSetStateStub) { return ERROR_DEVICE_NOT_CONNECTED; }
global XInputSetStateFn *XInputSetStateDyn = XInputSetStateStub;
#define XInputSetState XInputSetStateDyn
typedef HRESULT WINAPI DirectSoundCreateFn(LPCGUID pcGuidDevice, LPDIRECTSOUND *ppDS, LPUNKNOWN pUnkOuter);
internal void resizeDIBSection(Win32OffscreenBuffer *buffer, int width, int height) {
if (buffer->memory) {
VirtualFree(buffer->memory, NULL, MEM_RELEASE);
}
buffer->width = width;
buffer->height = height;
buffer->info.bmiHeader.biSize = sizeof(buffer->info.bmiHeader);
buffer->info.bmiHeader.biWidth = buffer->width;
buffer->info.bmiHeader.biHeight = -buffer->height;
buffer->info.bmiHeader.biPlanes = 1;
buffer->info.bmiHeader.biBitCount = 32;
buffer->info.bmiHeader.biCompression = BI_RGB;
int bitmapSize = buffer->width*buffer->height*4;
buffer->memory = VirtualAlloc(NULL, bitmapSize, MEM_COMMIT, PAGE_READWRITE);
}
internal Win32WindowDimensions win32GetWindowDimensions(HWND window) {
Win32WindowDimensions result;
RECT clientRect;
GetClientRect(window, &clientRect);
result.width = clientRect.right - clientRect.left;
result.height = clientRect.bottom - clientRect.top;
return result;
}
internal void win32DrawBufferInWindow(Win32OffscreenBuffer *buffer, HWND window) {
Win32WindowDimensions winDims = win32GetWindowDimensions(window);
StretchDIBits(
GetDC(window),
0, 0, winDims.width, winDims.height,
0, 0, buffer->width, buffer->height,
buffer->memory,
&buffer->info,
DIB_RGB_COLORS,
SRCCOPY
);
}
internal void win32LoadXInput() {
HMODULE xInputLib = LoadLibrary("xinput1_4.dll");
if (!xInputLib) {
xInputLib = LoadLibrary("xinput1_3.dll");
}
if (xInputLib) {
XInputGetState = (XInputGetStateFn *)GetProcAddress(xInputLib, "XInputGetState");
XInputSetState = (XInputSetStateFn *)GetProcAddress(xInputLib, "XInputSetState");
}
}
internal void win32InitSound(HWND window, int32 samplesPerSec, int bufferSize) {
HMODULE dSoundLibrary = LoadLibraryA("dsound.dll");
if (dSoundLibrary) {
DirectSoundCreateFn *DirectSoundCreate = (DirectSoundCreateFn*)GetProcAddress(dSoundLibrary, "DirectSoundCreate");
LPDIRECTSOUND DirectSound;
if (DirectSoundCreate && SUCCEEDED(DirectSoundCreate(0, &DirectSound, 0))) {
WAVEFORMATEX waveFormat = {};
waveFormat.wFormatTag = WAVE_FORMAT_PCM;
waveFormat.nChannels = 2;
waveFormat.nSamplesPerSec = samplesPerSec;
waveFormat.wBitsPerSample = 16;
waveFormat.nBlockAlign = (waveFormat.nChannels*waveFormat.wBitsPerSample) / 8;
waveFormat.nAvgBytesPerSec = waveFormat.nSamplesPerSec*waveFormat.nBlockAlign;
waveFormat.cbSize = 0;
if (SUCCEEDED(DirectSound->SetCooperativeLevel(window, DSSCL_PRIORITY))) {
DSBUFFERDESC bufferDescription = {};
bufferDescription.dwSize = sizeof(bufferDescription);
bufferDescription.dwFlags = DSBCAPS_PRIMARYBUFFER;
LPDIRECTSOUNDBUFFER primaryBuffer;
if (SUCCEEDED(DirectSound->CreateSoundBuffer(&bufferDescription, &primaryBuffer, 0))) {
if (SUCCEEDED(primaryBuffer->SetFormat(&waveFormat))) {
OutputDebugStringA("Primary buffer format was set.\n");
} else {
//No sound! (?)
}
}
} else {
// No sound! (?)
}
DSBUFFERDESC bufferDescription = {};
bufferDescription.dwSize = sizeof(bufferDescription);
bufferDescription.dwFlags = 0;
bufferDescription.dwBufferBytes = bufferSize;
bufferDescription.lpwfxFormat = &waveFormat;
if (SUCCEEDED(DirectSound->CreateSoundBuffer(&bufferDescription, &globalSecondaryBuffer, 0))) {
OutputDebugStringA("Secondary buffer created successfully!\n");
}
} else {
// No sound! (?)
}
}
}
LRESULT mainWindowCallback(
HWND window,
UINT message,
WPARAM wParam,
LPARAM lParam
) {
LRESULT result = 0;
switch (message) {
case WM_SIZE: {
} break;
case WM_DESTROY: {
OutputDebugStringA("WM_DESTROY\n");
} break;
case WM_CLOSE: {
running = false;
} break;
case WM_PAINT: {
PAINTSTRUCT paint = {};
HDC deviceContext = BeginPaint(window, &paint);
int x = paint.rcPaint.left;
int y = paint.rcPaint.top;
int width = paint.rcPaint.right - paint.rcPaint.left;
int height = paint.rcPaint.bottom - paint.rcPaint.top;
win32DrawBufferInWindow(&globalBackBuffer, window);
EndPaint(window, &paint);
} break;
case WM_ACTIVATEAPP: {
} break;
case WM_HOTKEY: {
if (wParam == HH_CTRLW) {
running = false;
}
} break;
case WM_SYSKEYDOWN:
case WM_SYSKEYUP:
case WM_KEYUP:
case WM_KEYDOWN: {
uint32 VKCode = wParam;
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: {
result = DefWindowProcA(window, message, wParam, lParam);
} break;
}
return result;
}
struct Win32SoundOutput {
int samplesPerSecond;
int toneHz;
int wavePeriod;
int16 toneVolume;
uint32 runningSampleIndex;
int bytesPerSample;
int secondaryBufferSize;
};
internal void win32FillSoundBuffer(Win32SoundOutput *soundOutput, DWORD byteToLock, DWORD bytesToWrite) {
VOID *region1;
DWORD region1Size;
VOID *region2;
DWORD region2Size;
HRESULT lock = globalSecondaryBuffer->Lock(byteToLock, bytesToWrite, &region1, &region1Size, &region2, &region2Size, 0);
if (SUCCEEDED(lock)) {
DWORD region1SampleCount = region1Size/soundOutput->bytesPerSample;
int16 *sampleOut = (int16*)region1;
for (DWORD sampleIndex = 0; sampleIndex < region1SampleCount; sampleIndex++) {
real32 t = 2.0f * PI32 * (real32)soundOutput->runningSampleIndex / (real32)soundOutput->wavePeriod;
int16 sampleValue = (int16)(sin(t) * (real32)soundOutput->toneVolume);
*sampleOut++ = sampleValue;
*sampleOut++ = sampleValue;
soundOutput->runningSampleIndex++;
}
DWORD region2SampleCount = region2Size/soundOutput->bytesPerSample;
sampleOut = (int16*)region2;
for (DWORD sampleIndex = 0; sampleIndex < region2SampleCount; sampleIndex++) {
real32 t = 2.0f * PI32 * (real32)soundOutput->runningSampleIndex / (real32)soundOutput->wavePeriod;
int16 sampleValue = (int16)(sin(t) * soundOutput->toneVolume);
*sampleOut++ = sampleValue;
*sampleOut++ = sampleValue;
soundOutput->runningSampleIndex++;
}
globalSecondaryBuffer->Unlock(region1, region1Size, region2, region2Size);
} else {
// no lock!
}
}
int APIENTRY WinMain(HINSTANCE instance, HINSTANCE prevInstance, PSTR commandLine, int commandShow) {
LARGE_INTEGER performanceFrequencyResult;
QueryPerformanceFrequency(&performanceFrequencyResult);
int64 performanceFrequency = performanceFrequencyResult.QuadPart;
WNDCLASSA windowClass = {};
windowClass.style = CS_VREDRAW | CS_HREDRAW;
windowClass.lpfnWndProc = &mainWindowCallback;
windowClass.hInstance = instance;
windowClass.lpszClassName = "HandmadeHeroWindowClass";
resizeDIBSection(&globalBackBuffer, 1280, 720);
if (RegisterClass(&windowClass)) {
HWND window = CreateWindowExA(
NULL,
windowClass.lpszClassName,
"Handmade Hero",
WS_OVERLAPPEDWINDOW | WS_VISIBLE,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
CW_USEDEFAULT,
NULL,
NULL,
instance,
NULL
);
if (window) {
HH_CTRLW = GlobalAddAtomA("HH_CTRLW");
RegisterHotKey(window, HH_CTRLW, MOD_CONTROL, 'W');
MSG message;
running = true;
// graphics test
int xOffset = 0;
int yOffset = 0;
// sound test
Win32SoundOutput soundOutput = {};
soundOutput.samplesPerSecond = 48000;
soundOutput.toneHz = 440; // A above middle C
soundOutput.wavePeriod = soundOutput.samplesPerSecond / soundOutput.toneHz;
soundOutput.toneVolume = 6000;
soundOutput.runningSampleIndex = 0;
soundOutput.bytesPerSample = sizeof(int16)*2;
soundOutput.secondaryBufferSize = soundOutput.samplesPerSecond*soundOutput.bytesPerSample;
win32LoadXInput();
win32InitSound(window, soundOutput.samplesPerSecond, soundOutput.secondaryBufferSize);
win32FillSoundBuffer(&soundOutput, 0, soundOutput.secondaryBufferSize);
globalSecondaryBuffer->Play(0, 0, DSBPLAY_LOOPING);
LARGE_INTEGER lastCounter;
QueryPerformanceCounter(&lastCounter);
int64 lastCycleCount = __rdtsc();
while (running) {
while (PeekMessageA(&message, NULL, NULL, NULL, PM_REMOVE)) {
if (message.message == WM_QUIT) {
running = false;
}
TranslateMessage(&message);
DispatchMessage(&message);
}
XINPUT_STATE controllerState;
for (DWORD controllerIndex = 0; controllerIndex < XUSER_MAX_COUNT; controllerIndex++) {
if (XInputGetState(controllerIndex, &controllerState) == ERROR_SUCCESS) {
break;
} 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;
GameOffscreenBuffer buffer = {};
buffer.memory = globalBackBuffer.memory;
buffer.width = globalBackBuffer.width;
buffer.height = globalBackBuffer.height;
GameInput input = {};
input.xOffset = xOffset;
input.yOffset = yOffset;
gameUpdateAndRender(&buffer, &input);
// Sound test
DWORD playCursor;
DWORD writeCursor;
if (SUCCEEDED(globalSecondaryBuffer->GetCurrentPosition(&playCursor, &writeCursor))) {
DWORD byteToLock = (soundOutput.runningSampleIndex*soundOutput.bytesPerSample) % soundOutput.secondaryBufferSize;
DWORD bytesToWrite;
if (byteToLock == playCursor) {
bytesToWrite = 0;
} else if (byteToLock > playCursor) {
bytesToWrite = soundOutput.secondaryBufferSize - byteToLock + playCursor;
} else {
bytesToWrite = playCursor - byteToLock;
}
win32FillSoundBuffer(&soundOutput, byteToLock, bytesToWrite);
}
win32DrawBufferInWindow(&globalBackBuffer, window);
LARGE_INTEGER endCounter;
QueryPerformanceCounter(&endCounter);
int64 endCycleCount = __rdtsc();
int32 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;
}
} else {
// failed
}
} else {
// failed
}
return(0);
}