1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531
| #include "stdafx.h"
#define INLINE_SSaveGdiObj
#include "TestTime.h"
#include "GetWindowLongPtr.h"
#include "Sprite.h"
#include "resource.h"
#pragma warning(disable:4204)
#define WMSG_UPDATENOW (WM_USER+100)
struct st_testTimeWndData
{
//TIMER action
UINT_PTR timerId;
UINT timerDelay;
//Performance counter
double periodPerf; //Period, in seconds (inverse of the frequency)
LARGE_INTEGER lastPerf;
//Double-buffer
HBITMAP hDbBmp;
struct SSaveGdiObj * pDbDC;
//Animated object
double speed;
double x;
struct st_sprite sprite;
BOOL bSpriteOK;
//Mouse
int mouseX, mouseY;
HPEN hMousePen;
//Mouse chaser
double mouseChaserX, mouseChaserY;
HPEN hMouseChaserPen;
double mouseChaserSpeed;
};
/* Update action. For the ChangeUpdateAction function,
the higher the value, the more "active" it's considered. */
enum e_updateAction
{
LOWEST,
TIMER = LOWEST,
REPOST,
PAINT,
ERASE_PAINT
};
static LRESULT CALLBACK TestTimeWndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
static LONGLONG GetNewCounter(LARGE_INTEGER * pt_counter);
static void ChangeUpdateAction(enum e_updateAction * pt_eAction, enum e_updateAction eNew);
static void MoveX(struct st_testTimeWndData *pt_data, HWND hWnd, double fTimeDiff, enum e_updateAction * pt_eAction);
static void MoveMouseChaser(struct st_testTimeWndData *pt_data, HWND hWnd, double fTimeDiff, enum e_updateAction * pt_eAction);
BOOL CreateWndClass(HINSTANCE hInst, LPCTSTR * pt_sczClassName)
{
static const LPCTSTR sczClassName = _T("TestTimeWndClass");
BOOL bRet = TRUE;
if(pt_sczClassName)
*pt_sczClassName = sczClassName;
if(hInst)
{
WNDCLASSEX const wcx = {
sizeof wcx, 0|CS_VREDRAW|CS_HREDRAW/**/, TestTimeWndProc,
0, sizeof(struct st_testTimeWndData *), hInst,
NULL, LoadCursor(NULL, IDC_ARROW), (HBRUSH)(COLOR_WINDOW+1),
NULL, sczClassName,
NULL
};
bRet = (RegisterClassEx(&wcx) != 0);
}
return bRet;
}
static LRESULT CALLBACK TestTimeWndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
LRESULT ret = 0;
struct st_testTimeWndData * pt_data = (struct st_testTimeWndData *)GetWindowLongPtr(hWnd, 0);
switch(uMsg)
{
case WM_CREATE:
{
LARGE_INTEGER liFreq = {0};
//Performance counter frequency
if(ret >= 0)
{
if(!QueryPerformanceFrequency(&liFreq))
ret = -1;
}
//Data
if(ret >= 0)
{
pt_data = malloc(sizeof *pt_data);
SetWindowLongPtr(hWnd, 0, (LONG_PTR)pt_data);
if(pt_data==NULL)
ret = -1;
}
//Double buffer
if(ret >= 0)
{
HDC hdc = GetDC(NULL);
HDC hCompatDC = CreateCompatibleDC(hdc);
RECT r;
GetClientRect(hWnd, &r);
if(hCompatDC)
{
HBITMAP hBitmap = CreateCompatibleBitmap(hdc, r.right, r.bottom);
if(hBitmap != NULL)
{
pt_data->pDbDC = SSaveGdiObj_NewFromObj(hCompatDC, hBitmap, TRUE);
if(pt_data->pDbDC != NULL)
{
//OK.
pt_data->hDbBmp = hBitmap;
}
else
{
DeleteObject(hBitmap), hBitmap=NULL;
ret = -1;
}
}
else
{
DeleteDC(hCompatDC), hCompatDC=NULL;
ret = -1;
}
}
else
ret = -1;
ReleaseDC(NULL, hdc), hdc=NULL;
}
//Moving things
if(ret >= 0)
{
HINSTANCE hInst = ((LPCREATESTRUCT)lParam)->hInstance;
double freq = (double)liFreq.QuadPart;
assert(freq > 0.0);
assert(pt_data != NULL);
pt_data->periodPerf = 1.0/freq;
assert(pt_data->periodPerf > 0.0);
pt_data->x = 0;
pt_data->speed = 96;
{
HBITMAP hBmp = LoadBitmap(hInst,MAKEINTRESOURCE(IDB_SPRITE32));
//HBITMAP hMask = LoadBitmap(hInst,MAKEINTRESOURCE(IDB_MASK32_1));
pt_data->sprite.cb = sizeof(pt_data->sprite);
//pt_data->bSpriteOK = InitializeSpriteFromMask(&pt_data->sprite, TRUE, hBmp, hMask);
pt_data->bSpriteOK = InitializeSpriteFromColor(&pt_data->sprite, TRUE, hBmp, RGB(0, 255, 0));
if(pt_data->bSpriteOK)
{
//SetSpriteFormat(&pt_data->sprite, SF_BITMAPONWHITE|SF_MASKONBLACK);
}
else
{
DeleteObject(hBmp);
//DeleteObject(hMask);
}
}
pt_data->mouseX = -1;
pt_data->mouseY = -1;
pt_data->hMousePen = CreatePen(PS_SOLID, 0, RGB(192, 192, 192));
pt_data->mouseChaserX = -1;
pt_data->mouseChaserY = -1;
pt_data->hMouseChaserPen = CreatePen(PS_SOLID, 0, RGB(0, 0, 255));
pt_data->mouseChaserSpeed = 144;
QueryPerformanceCounter(&pt_data->lastPerf);
}
}
if(ret >= 0)
PostMessage(hWnd, WMSG_UPDATENOW, 0, 0);
break;
case WM_DESTROY:
if(pt_data != NULL)
{
DeleteObject(pt_data->hMousePen), pt_data->hMousePen=NULL;
DeleteObject(pt_data->hMouseChaserPen), pt_data->hMouseChaserPen=NULL;
if(pt_data->bSpriteOK)
ClearSprite(&pt_data->sprite), pt_data->bSpriteOK=FALSE;
if(pt_data->pDbDC != NULL)
SSaveGdiObj_Delete(pt_data->pDbDC), pt_data->pDbDC=NULL, pt_data->hDbBmp=NULL;
}
free(pt_data), pt_data = NULL;
SetWindowLongPtr(hWnd, 0, (LONG_PTR)pt_data);
{
MSG msg;
while(PeekMessage(&msg, hWnd, WMSG_UPDATENOW, WMSG_UPDATENOW, PM_REMOVE)) {}
}
//Exit the message loop when the window is closed.
PostQuitMessage(0);
break;
case WM_TIMER:
if(pt_data!=NULL && pt_data->timerId != 0 && pt_data->timerId != wParam)
{
KillTimer(hWnd, pt_data->timerId);
PostMessage(hWnd, WMSG_UPDATENOW, 0, 0);
}
break;
case WMSG_UPDATENOW:
//Allow only one WMSG_UPDATENOW per window
{
MSG msg;
while(PeekMessage(&msg, hWnd, WMSG_UPDATENOW, WMSG_UPDATENOW, PM_REMOVE)) {}
}
if(pt_data!=NULL)
{
enum e_updateAction eAction = REPOST; //Always repost at least (100% CPU)
LONGLONG const diff = GetNewCounter(&pt_data->lastPerf);
if(diff != 0)
{
double const fDiff = (double)diff;
double const fTimeDiff = fDiff * pt_data->periodPerf;
assert(fDiff > 0.0);
assert(fTimeDiff > 0.0);
//Move X.
MoveX(pt_data, hWnd, fTimeDiff, &eAction);
//Move mouse chaser.
MoveMouseChaser(pt_data, hWnd, fTimeDiff, &eAction);
}//If diff
//Repost the message if not painting.
switch(eAction)
{
case TIMER:
if(pt_data->timerId != 0)
{
SetTimer(hWnd, pt_data->timerId, pt_data->timerDelay, NULL);
}
break;
case REPOST:
PostMessage(hWnd, WMSG_UPDATENOW, 0, 0);
break;
case PAINT:
InvalidateRect(hWnd, NULL, FALSE);
break;
case ERASE_PAINT:
InvalidateRect(hWnd, NULL, TRUE);
break;
}
}//if pt_data!=NULL
break;
case WM_LBUTTONDOWN:
SetCapture(hWnd);
//no break
case WM_MOUSEMOVE:
if(pt_data != NULL)
{
pt_data->mouseX = GET_X_LPARAM(lParam);
pt_data->mouseY = GET_Y_LPARAM(lParam);
InvalidateRect(hWnd, NULL, TRUE);
}
break;
case WM_LBUTTONUP:
ReleaseCapture();
break;
case WM_ERASEBKGND:
//TODO: I think I do not handle this message correctly.
//I should:
//* Repaint the bitmap, independently from size
// (if the bitmap is too small, maybe erase the rest)
//* Set a flag asking to clear the bitmap even if not just re-created.
if(pt_data!=NULL && SSaveGdiObj_GetSafeHdc(pt_data->pDbDC)!=NULL)
{
ULONG_PTR upHBrush = GetClassLongPtr(hWnd, GCL_HBRBACKGROUND);
RECT r;
GetClientRect(hWnd, &r);
FillRect(pt_data->pDbDC->m_hdc, &r, (HBRUSH)upHBrush);
}
else //Removing the ELSE Cleans the bitmap IN ADDITION to erasing. But the flicker comes back.
ret = DefWindowProc(hWnd, uMsg, wParam, lParam);
break;
case WM_PAINT:
{
PAINTSTRUCT ps;
HDC hdcWin = BeginPaint(hWnd, &ps);
HDC hdc = hdcWin;
if(pt_data != NULL)
{
RECT r;
GetClientRect(hWnd, &r);
//Use the double buffer if possible
if(SSaveGdiObj_GetSafeHdc(pt_data->pDbDC)!=NULL)
{
BITMAP bmp = {0};
GetObject(pt_data->hDbBmp, sizeof(bmp), &bmp);
if(bmp.bmWidth!=r.right || bmp.bmHeight!=r.bottom)
{
pt_data->hDbBmp = CreateCompatibleBitmap(hdcWin, r.right, r.bottom);
SSaveGdiObj_Select(pt_data->pDbDC, pt_data->hDbBmp, TRUE);
//Always erase the bitmap contents when re-creating : seems that it is created black.
{
ULONG_PTR upHBrush = GetClassLongPtr(hWnd, GCL_HBRBACKGROUND);
FillRect(pt_data->pDbDC->m_hdc, &r, (HBRUSH)upHBrush);
}
}
hdc = pt_data->pDbDC->m_hdc;
}
//Mouse
assert(r.left==0 && r.top==0);
if((pt_data->mouseX >= 0 && pt_data->mouseX < r.right)
|| (pt_data->mouseY >= 0 && pt_data->mouseY < r.bottom))
{
HPEN hPen = ((pt_data->hMousePen != NULL) ? pt_data->hMousePen : GetStockObject(BLACK_PEN));
HGDIOBJ hOldPen = SelectObject(hdc, hPen);
if(pt_data->mouseX >= 0 && pt_data->mouseX < r.right)
{
MoveToEx(hdc, pt_data->mouseX, 0, NULL);
LineTo(hdc, pt_data->mouseX, r.bottom);
}
if(pt_data->mouseY >= 0 && pt_data->mouseY < r.bottom)
{
MoveToEx(hdc, 0, pt_data->mouseY, NULL);
LineTo(hdc, r.right, pt_data->mouseY);
}
SelectObject(hdc, hOldPen);
}
//Mouse chaser.
{
HPEN hPen = ((pt_data->hMouseChaserPen != NULL) ? pt_data->hMouseChaserPen : GetStockObject(BLACK_PEN));
HGDIOBJ hOldPen = SelectObject(hdc, hPen);
MoveToEx(hdc, (int)pt_data->mouseChaserX-10, (int)pt_data->mouseChaserY-10, NULL);
LineTo(hdc, (int)pt_data->mouseChaserX+11, (int)pt_data->mouseChaserY+11);
MoveToEx(hdc, (int)pt_data->mouseChaserX+10, (int)pt_data->mouseChaserY-10, NULL);
LineTo(hdc, (int)pt_data->mouseChaserX-11, (int)pt_data->mouseChaserY+11);
SelectObject(hdc, hOldPen);
}
//Moving object
{
const int SPRITE_WIDTH = 32;
const int SPRITE_HEIGHT = 32;
if(pt_data->bSpriteOK)
DrawSprite(&pt_data->sprite, hdc, (int)pt_data->x-SPRITE_WIDTH/2, r.bottom/2-SPRITE_HEIGHT/2);
else
SetPixelV(hdc, (int)pt_data->x, r.bottom/2, RGB(255, 0, 0));
}
if(pt_data->pDbDC!=NULL && pt_data->pDbDC->m_hdc!=NULL)
BitBlt(hdcWin, 0, 0, r.right, r.bottom, pt_data->pDbDC->m_hdc, 0, 0, SRCCOPY);
}
EndPaint(hWnd, &ps);
PostMessage(hWnd, WMSG_UPDATENOW, 0, 0);
}
break;
default:
ret = DefWindowProc(hWnd, uMsg, wParam, lParam);
break;
}
return ret;
}
/* Query the performance counter, update the value and return the difference with the old one.
------------------------------------------------------------------------------------------- */
static LONGLONG GetNewCounter(LARGE_INTEGER *pt_counter)
{
LARGE_INTEGER newPerf;
assert(pt_counter != NULL);
QueryPerformanceCounter(&newPerf);
if(newPerf.QuadPart != pt_counter->QuadPart)
{
LONGLONG lastComp = pt_counter->QuadPart;
LONGLONG liComp = newPerf.QuadPart;
if(liComp < lastComp)
{
//Counter wrapped. Offset both values.
static const ULONGLONG inc = 0x8000000000000000ULL;
//---- ----- --------- --- = FEDCBA9876543210
liComp += inc;
lastComp += inc;
}
pt_counter->QuadPart = newPerf.QuadPart;
//Local variables
{
LONGLONG const diff = liComp - lastComp;
assert(diff > 0); //because of enclosing if
return diff;
}//Local variables
}
else
return 0;
}
/* Change the update action for something more "active"
---------------------------------------------------- */
static void ChangeUpdateAction(enum e_updateAction * pt_eAction, enum e_updateAction eNew)
{
if(*pt_eAction < eNew)
*pt_eAction = eNew;
}
/* Modify X according to the time difference
----------------------------------------- */
static void MoveX(struct st_testTimeWndData *pt_data, HWND hWnd, double fTimeDiff, enum e_updateAction * pt_eAction)
{
double const oldX = floor(pt_data->x);
double newX = pt_data->x;
//Local variables : Increment X.
{
double const incX = (fTimeDiff * pt_data->speed);
assert(fTimeDiff > 0.0);
if(pt_data->speed > 0)
assert(incX > 0);
else
assert(incX < 0);
newX += incX;
}
//Ensure X doesn't leave the window.
{
RECT r;
GetClientRect(hWnd, &r);
while(r.right != 0 && (newX < 0 || newX > r.right))
{
if(newX > r.right)
{
newX = r.right - (newX - r.right);
pt_data->speed = -pt_data->speed;
//Erase the window
ChangeUpdateAction(pt_eAction, ERASE_PAINT);
}
if(newX < 0)
{
newX = -newX;
pt_data->speed = -pt_data->speed;
//Erase the window
ChangeUpdateAction(pt_eAction, ERASE_PAINT);
}
}
}
pt_data->x = newX;
if(floor(newX) != oldX)
{
//Redraw or erase the window.
if(SSaveGdiObj_GetSafeHdc(pt_data->pDbDC)!=NULL)
ChangeUpdateAction(pt_eAction, ERASE_PAINT);
else
ChangeUpdateAction(pt_eAction, PAINT);
}
}
/* Modify mouse chaser coordinates according to the time difference
---------------------------------------------------------------- */
static void MoveMouseChaser(struct st_testTimeWndData *pt_data, HWND hWnd, double fTimeDiff, enum e_updateAction * pt_eAction)
{
double const oldX = floor(pt_data->mouseChaserX);
double newX = pt_data->mouseChaserX;
double const oldY = floor(pt_data->mouseChaserY);
double newY = pt_data->mouseChaserY;
(void)hWnd;
if(pt_data->mouseChaserX == pt_data->mouseX && pt_data->mouseChaserY == pt_data->mouseY)
return;
//Local variables : Calculate Increments.
{
double incX = 0.0, incY = 0.0;
double const inc = (fTimeDiff * pt_data->mouseChaserSpeed);
assert(fTimeDiff > 0.0);
assert(pt_data->mouseChaserSpeed > 0.0);
assert(inc > 0);
{
double const diffX = pt_data->mouseX - pt_data->mouseChaserX;
double const diffY = pt_data->mouseY - pt_data->mouseChaserY;
double const angle = atan2(diffY, diffX);
if(diffX != 0.0)
incX = inc*cos(angle);
if(diffY != 0.0)
incY = inc*sin(angle);
}
newX += incX;
newY += incY;
//Ensure the chaser doesn't pass the mouse
{
if(newX > pt_data->mouseX && incX > 0.0)
newX = pt_data->mouseX;
if(newX < pt_data->mouseX && incX < 0.0)
newX = pt_data->mouseX;
if(newY > pt_data->mouseY && incY > 0.0)
newY = pt_data->mouseY;
if(newY < pt_data->mouseY && incY < 0.0)
newY = pt_data->mouseY;
}
}
pt_data->mouseChaserX = newX;
pt_data->mouseChaserY = newY;
if(floor(newX) != oldX || floor(newY) != oldY)
{
//Redraw the window.
ChangeUpdateAction(pt_eAction, ERASE_PAINT);
}
} |
Partager