ReactOS 0.4.15-dev-7711-g5627da4
matrix.c File Reference
#include <windows.h>
#include <windowsx.h>
#include <tchar.h>
#include "globals.h"
#include "message.h"
#include "matrix.h"
#include "resource.h"
Include dependency graph for matrix.c:

Go to the source code of this file.

Functions

void DoMatrixMessage (HDC hdc, MATRIX *matrix)
 
int crc_rand ()
 
int GlyphIntensity (GLYPH glyph)
 
GLYPH DarkenGlyph (GLYPH glyph)
 
GLYPH RandomGlyph (int intensity)
 
void RedrawBlip (GLYPH *glypharr, int blippos)
 
void ScrollMatrixColumn (MATRIX_COLUMN *col)
 
void RandomMatrixColumn (MATRIX_COLUMN *col)
 
void DrawGlyph (MATRIX *matrix, HDC hdc, int xpos, int ypos, GLYPH glyph)
 
void RedrawMatrixColumn (MATRIX_COLUMN *col, MATRIX *matrix, HDC hdc, int xpos)
 
void DecodeMatrix (HWND hwnd, MATRIX *matrix)
 
MATRIXCreateMatrix (HWND hwnd, int width, int height)
 
void DestroyMatrix (MATRIX *matrix)
 
MATRIXGetMatrix (HWND hwnd)
 
void SetMatrix (HWND hwnd, MATRIX *matrix)
 
LRESULT WINAPI MatrixWndProc (HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
 
HWND CreateScreenSaveWnd (HWND hwndParent, RECT *rect)
 
void InitScreenSaveClass (BOOL fPreview)
 

Variables

static WORD _crc_reg = 0
 

Function Documentation

◆ crc_rand()

int crc_rand ( )

Definition at line 18 of file matrix.c.

19{
20 const WORD mask = 0xb400;
21
22 if(_crc_reg & 1)
23 _crc_reg = (_crc_reg >> 1) ^ mask;
24 else
25 _crc_reg = (_crc_reg >> 1);
26
27 return _crc_reg;
28}
unsigned short WORD
Definition: ntddk_ex.h:93
GLenum GLint GLuint mask
Definition: glext.h:6028
static WORD _crc_reg
Definition: matrix.c:17

Referenced by CreateMatrix(), DoMatrixMessage(), InitMatrixMessage(), RandomGlyph(), RandomMatrixColumn(), and ScrollMatrixColumn().

◆ CreateMatrix()

MATRIX * CreateMatrix ( HWND  hwnd,
int  width,
int  height 
)

Definition at line 222 of file matrix.c.

223{
224 MATRIX *matrix;
225 HDC hdc;
226 int x, y;
227
228 int rows = height / GLYPH_HEIGHT + 1;
229 int cols = width / GLYPH_WIDTH + 1;
230
231 // allocate matrix!
232 if((matrix = malloc(sizeof(MATRIX) + sizeof(MATRIX_COLUMN) * cols)) == 0)
233 return 0;
234
235 matrix->numcols = cols;
236 matrix->numrows = rows;
237 matrix->width = width;
238 matrix->height = height;
239
240 for(x = 0; x < cols; x++)
241 {
242 matrix->column[x].length = rows;
243 matrix->column[x].started = FALSE;
244 matrix->column[x].countdown = crc_rand() % 100;
245 matrix->column[x].state = crc_rand() % 2;
246 matrix->column[x].runlen = crc_rand() % 20 + 3;
247
248 matrix->column[x].glyph = malloc(sizeof(GLYPH) * (rows+16));
249
250 for(y = 0; y < rows; y++)
251 matrix->column[x].glyph[y] = 0;//;
252 }
253
254 // Load bitmap!!
255 hdc = GetDC(NULL);
257 matrix->hdcBitmap = CreateCompatibleDC(hdc);
258 SelectObject(matrix->hdcBitmap, matrix->hbmBitmap);
260
261 // Create a message for this window...only if we are
262 // screen-saving (not if in preview mode)
263 if(GetParent(hwnd) == 0)
264 matrix->message = InitMatrixMessage(hwnd, matrix->numcols, matrix->numrows);
265 else
266 matrix->message = 0;
267
268 return matrix;
269}
#define IDB_BITMAP1
Definition: resource.h:16
#define malloc
Definition: debug_ros.c:4
#define NULL
Definition: types.h:112
#define FALSE
Definition: types.h:117
GLint GLint GLint GLint GLint x
Definition: gl.h:1548
GLint GLint GLint GLint GLint GLint y
Definition: gl.h:1548
GLint GLint GLsizei GLsizei height
Definition: gl.h:1546
GLint GLint GLsizei width
Definition: gl.h:1546
GLuint GLenum matrix
Definition: glext.h:9407
#define GLYPH_HEIGHT
Definition: globals.h:18
#define GLYPH_WIDTH
Definition: globals.h:17
int crc_rand()
Definition: matrix.c:18
unsigned short GLYPH
Definition: matrix.h:18
MATRIX_MESSAGE * InitMatrixMessage(HWND hwnd, int width, int height)
Definition: message.c:229
HDC hdc
Definition: main.c:9
static HDC
Definition: imagelist.c:92
Definition: matrix.h:44
#define GetModuleHandle
Definition: winbase.h:3762
_In_ LONG _In_ HWND hwnd
Definition: winddi.h:4023
HGDIOBJ WINAPI SelectObject(_In_ HDC, _In_ HGDIOBJ)
Definition: dc.c:1539
HDC WINAPI CreateCompatibleDC(_In_opt_ HDC hdc)
int WINAPI ReleaseDC(_In_opt_ HWND, _In_ HDC)
#define LoadBitmap
Definition: winuser.h:5810
HDC WINAPI GetDC(_In_opt_ HWND)
HWND WINAPI GetParent(_In_ HWND)
#define MAKEINTRESOURCE
Definition: winuser.h:591

Referenced by DECLARE_INTERFACE_(), and MatrixWndProc().

◆ CreateScreenSaveWnd()

HWND CreateScreenSaveWnd ( HWND  hwndParent,
RECT rect 
)

Definition at line 390 of file matrix.c.

391{
392 DWORD dwStyle = hwndParent ? WS_CHILD : WS_POPUP;
393
394#ifdef _DEBUG
395 DWORD dwStyleEx = 0;
396#else
397 DWORD dwStyleEx = WS_EX_TOPMOST;
398#endif
399
400 if(hwndParent)
402
403 return CreateWindowEx( dwStyleEx,
404 APPNAME,
405 0,
406 WS_VISIBLE | dwStyle,
407 rect->left,
408 rect->top,
409 rect->right - rect->left,
410 rect->bottom - rect->top,
412 0,
414 0
415 );
416}
#define APPNAME
Definition: 3dtext.c:40
static HWND hwndParent
Definition: cryptui.c:300
unsigned long DWORD
Definition: ntddk_ex.h:95
#define WS_CHILD
Definition: pedump.c:617
#define WS_POPUP
Definition: pedump.c:616
#define WS_VISIBLE
Definition: pedump.c:620
#define WS_EX_TOPMOST
Definition: pedump.c:647
& rect
Definition: startmenu.cpp:1413
#define CreateWindowEx
Definition: winuser.h:5754
BOOL WINAPI GetClientRect(_In_ HWND, _Out_ LPRECT)

Referenced by MonitorEnumProc().

◆ DarkenGlyph()

GLYPH DarkenGlyph ( GLYPH  glyph)

Definition at line 35 of file matrix.c.

36{
37 int intensity = GlyphIntensity(glyph);
38
39 if(intensity > 0)
40 return GLYPH_REDRAW | ((intensity - 1) << 8) | (glyph & 0x00FF);
41 else
42 return glyph;
43}
int GlyphIntensity(GLYPH glyph)
Definition: matrix.c:30
#define GLYPH_REDRAW
Definition: matrix.h:20

Referenced by ScrollMatrixColumn().

◆ DecodeMatrix()

void DecodeMatrix ( HWND  hwnd,
MATRIX matrix 
)

Definition at line 201 of file matrix.c.

202{
203 int x;
204 HDC hdc = GetDC(hwnd);
205
206 for(x = 0; x < matrix->numcols; x++)
207 {
208 RandomMatrixColumn(&matrix->column[x]);
209 ScrollMatrixColumn(&matrix->column[x]);
211 }
212
213 if(matrix->message)
215
217}
void ScrollMatrixColumn(MATRIX_COLUMN *col)
Definition: matrix.c:58
void DoMatrixMessage(HDC hdc, MATRIX *matrix)
Definition: message.c:149
void RedrawMatrixColumn(MATRIX_COLUMN *col, MATRIX *matrix, HDC hdc, int xpos)
Definition: matrix.c:176
void RandomMatrixColumn(MATRIX_COLUMN *col)
Definition: matrix.c:147

Referenced by MatrixWndProc().

◆ DestroyMatrix()

void DestroyMatrix ( MATRIX matrix)

Definition at line 274 of file matrix.c.

275{
276 int x;
277
278 // free the matrix columns
279 for(x = 0; x < matrix->numcols; x++)
280 free(matrix->column[x].glyph);
281
282 DeleteDC(matrix->hdcBitmap);
283 DeleteObject(matrix->hbmBitmap);
284
285 // now delete the matrix!
286 free(matrix);
287}
#define free
Definition: debug_ros.c:5
pKey DeleteObject()
BOOL WINAPI DeleteDC(_In_ HDC)

Referenced by MatrixWndProc().

◆ DoMatrixMessage()

void DoMatrixMessage ( HDC  hdc,
MATRIX matrix 
)

Definition at line 149 of file message.c.

150{
151 MATRIX_MESSAGE *msg = matrix->message;
152
153 int RealSpeed = MessageSpeed();
154
155 if(g_nNumMessages > 0)
156 {
157 // nothing to do yet..
158 if(msg->counter++ < 0)
159 return;
160
161 // has counter reached limit..clear the message
162 if(msg->counter++ == RealSpeed / 2 + (RealSpeed/4))
164
165 // reset counter + display a new message
166 if(msg->counter >= RealSpeed)
167 {
168 // mark all message-cells as being "invisible" so the
169 // message gets cleared by the matrix decoding naturally
170
172 msg->msgindex = crc_rand() % g_nNumMessages;
173 else
174 msg->msgindex = (msg->msgindex + 1) % g_nNumMessages;
175
176 // make a new message..initially invisible
177 SetMatrixMessage(msg, 0, g_szMessages[msg->msgindex]);
178
179 msg->counter = -(int)(crc_rand() % MSGSPEED_MAX);
180 }
181 // reveal the next part of the message
182 else if(msg->counter < RealSpeed / 2)
183 {
185 w = (1 << 16) + ((w<<16) / MSGSPEED_MAX);
186 w = (w * 3 * g_nMessageSpeed) >> 16;
187
188 RevealMatrixMessage(msg, w + 100);
189 }
190
191 //
192 // draw whatever part of the message is visible at this time
193 //
195 }
196}
#define msg(x)
Definition: auth_time.c:54
unsigned int(__cdecl typeof(jpeg_read_scanlines))(struct jpeg_decompress_struct *
Definition: typeof.h:31
GLubyte GLubyte GLubyte GLubyte w
Definition: glext.h:6102
int g_nNumMessages
Definition: settings.c:14
BOOL g_fRandomizeMessages
Definition: settings.c:21
TCHAR g_szMessages[MAX_MESSAGES][MAXMSG_LENGTH]
Definition: settings.c:13
int g_nMessageSpeed
Definition: settings.c:15
#define MSGSPEED_MIN
Definition: globals.h:28
#define MSGSPEED_MAX
Definition: globals.h:27
int crc_rand()
Definition: matrix.c:18
int MessageSpeed()
Definition: message.c:141
void RevealMatrixMessage(MATRIX_MESSAGE *msg, int amount)
Definition: message.c:113
void DrawMatrixMessage(MATRIX *matrix, MATRIX_MESSAGE *msg, HDC hdc)
Definition: message.c:97
void ClearMatrixMessage(MATRIX_MESSAGE *msg)
Definition: message.c:129
void SetMatrixMessage(MATRIX_MESSAGE *msg, HFONT hFont, TCHAR *text)
Definition: message.c:38

Referenced by DecodeMatrix().

◆ DrawGlyph()

void DrawGlyph ( MATRIX matrix,
HDC  hdc,
int  xpos,
int  ypos,
GLYPH  glyph 
)

Definition at line 167 of file matrix.c.

168{
169 int intensity = GlyphIntensity(glyph);
170 int glyphidx = glyph & 0xff;
171
172 BitBlt(hdc, xpos, ypos, GLYPH_WIDTH, GLYPH_HEIGHT, matrix->hdcBitmap,
173 glyphidx * GLYPH_WIDTH, intensity * GLYPH_HEIGHT, SRCCOPY);
174}
static VOID NTAPI BitBlt(_In_ ULONG Left, _In_ ULONG Top, _In_ ULONG Width, _In_ ULONG Height, _In_reads_bytes_(Delta *Height) PUCHAR Buffer, _In_ ULONG BitsPerPixel, _In_ ULONG Delta)
Definition: common.c:49
#define SRCCOPY
Definition: wingdi.h:333

Referenced by DrawMatrixMessage(), and RedrawMatrixColumn().

◆ GetMatrix()

MATRIX * GetMatrix ( HWND  hwnd)

Definition at line 289 of file matrix.c.

290{
292}
#define GetWindowLongPtr
Definition: treelist.c:73
#define GWLP_USERDATA
Definition: treelist.c:63

Referenced by DECLARE_INTERFACE_(), and MatrixWndProc().

◆ GlyphIntensity()

int GlyphIntensity ( GLYPH  glyph)

Definition at line 30 of file matrix.c.

31{
32 return (int)((glyph & 0x7f00) >> 8);
33}

Referenced by DarkenGlyph(), DrawGlyph(), RandomMatrixColumn(), RedrawMatrixColumn(), and ScrollMatrixColumn().

◆ InitScreenSaveClass()

void InitScreenSaveClass ( BOOL  fPreview)

Definition at line 421 of file matrix.c.

422{
423 WNDCLASSEX wcx;
424
425 wcx.cbSize = sizeof(WNDCLASSEX);
426 wcx.style = 0;
428 wcx.cbClsExtra = 0;
429 wcx.cbWndExtra = sizeof(MATRIX *);
430 wcx.hInstance = GetModuleHandle(0);
431 wcx.hIcon = 0;
433 wcx.lpszMenuName = 0;
435 wcx.hIconSm = 0;
436
437 if(fPreview)
438 wcx.hCursor = LoadCursor(0, IDC_ARROW);
439 else
441
442 // initialize the crc register used for "random" number generation
444
445 RegisterClassEx(&wcx);
446}
DWORD WINAPI GetTickCount(VOID)
Definition: time.c:455
LRESULT WINAPI MatrixWndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
Definition: matrix.c:302
#define IDC_BLANKCURSOR
Definition: resource.h:6
int cbClsExtra
Definition: winuser.h:3203
HINSTANCE hInstance
Definition: winuser.h:3205
HCURSOR hCursor
Definition: winuser.h:3207
LPCSTR lpszMenuName
Definition: winuser.h:3209
HICON hIconSm
Definition: winuser.h:3211
UINT style
Definition: winuser.h:3201
int cbWndExtra
Definition: winuser.h:3204
UINT cbSize
Definition: winuser.h:3200
WNDPROC lpfnWndProc
Definition: winuser.h:3202
LPCSTR lpszClassName
Definition: winuser.h:3210
HICON hIcon
Definition: winuser.h:3206
HBRUSH hbrBackground
Definition: winuser.h:3208
HGDIOBJ WINAPI GetStockObject(_In_ int)
#define BLACK_BRUSH
Definition: wingdi.h:896
#define IDC_ARROW
Definition: winuser.h:687
#define RegisterClassEx
Definition: winuser.h:5836
#define LoadCursor
Definition: winuser.h:5811
WNDCLASSEXA WNDCLASSEX
Definition: winuser.h:5718

◆ MatrixWndProc()

LRESULT WINAPI MatrixWndProc ( HWND  hwnd,
UINT  msg,
WPARAM  wParam,
LPARAM  lParam 
)

Definition at line 302 of file matrix.c.

303{
304 static POINT ptLast;
305 static POINT ptCursor;
306 static BOOL fFirstTime = TRUE;
307
309
310 switch(msg)
311 {
312 // window creation
313 case WM_NCCREATE:
314
315 // create the matrix based on how big this window is
317
318 // failed to allocate? stop window creation!
319 if(matrix == 0)
320 return FALSE;
321
323
324 // start off an animation timer
325 SetTimer(hwnd, 0xdeadbeef, ((SPEED_MAX - g_nMatrixSpeed) + SPEED_MIN) * 10, 0);
326
327 return TRUE;
328
329 // window being destroyed, cleanup
330 case WM_NCDESTROY:
333 return 0;
334
335 // animation timer has gone off, redraw the matrix!
336 case WM_TIMER:
338 return 0;
339
340 // break out of screen-saver if any keyboard activity
341 case WM_KEYDOWN:
342 case WM_SYSKEYDOWN:
343 PostMessage(hwnd, WM_CLOSE, 0, 0);
344 return 0;
345
346 // break out of screen-saver if any mouse activity
347 case WM_LBUTTONDOWN:
348 case WM_LBUTTONUP:
349 case WM_RBUTTONDOWN:
350 case WM_RBUTTONUP:
351 case WM_MBUTTONDOWN:
352 case WM_MBUTTONUP:
353 case WM_MOUSEMOVE:
354
355 // If we've got a parent then we must be a preview
356 if(GetParent(hwnd) != 0)
357 return 0;
358
359 if(fFirstTime)
360 {
361 GetCursorPos(&ptLast);
362 fFirstTime = FALSE;
363 }
364
365 GetCursorPos(&ptCursor);
366
367 // if the mouse has moved more than 3 pixels then exit
368 if(abs(ptCursor.x - ptLast.x) >= 3 || abs(ptCursor.y - ptLast.y) >= 3)
369 PostMessage(hwnd, WM_CLOSE, 0, 0);
370
371 ptLast = ptCursor;
372
373 return 0;
374
375 // someone wants to close us...see if it's ok
376 case WM_CLOSE:
377
379 {
380 KillTimer(hwnd, 0xdeadbeef);
382 }
383
384 return 0;
385 }
386
388}
WPARAM wParam
Definition: combotst.c:138
LPARAM lParam
Definition: combotst.c:139
#define TRUE
Definition: types.h:120
#define abs(i)
Definition: fconv.c:206
unsigned int BOOL
Definition: ntddk_ex.h:94
BOOL VerifyPassword(HWND hwnd)
Definition: password.c:12
int g_nMatrixSpeed
Definition: settings.c:18
#define SPEED_MAX
Definition: globals.h:20
#define SPEED_MIN
Definition: globals.h:21
void DecodeMatrix(HWND hwnd, MATRIX *matrix)
Definition: matrix.c:201
void DestroyMatrix(MATRIX *matrix)
Definition: matrix.c:274
MATRIX * GetMatrix(HWND hwnd)
Definition: matrix.c:289
MATRIX * CreateMatrix(HWND hwnd, int width, int height)
Definition: matrix.c:222
@ SetMatrix
Definition: shader.c:1966
_Out_opt_ int _Out_opt_ int * cy
Definition: commctrl.h:586
_Out_opt_ int * cx
Definition: commctrl.h:585
#define DefWindowProc
Definition: ros2win.h:31
long y
Definition: polytest.cpp:48
long x
Definition: polytest.cpp:48
#define WM_CLOSE
Definition: winuser.h:1620
__analysis_noreturn void WINAPI PostQuitMessage(_In_ int)
BOOL WINAPI GetCursorPos(_Out_ LPPOINT)
Definition: cursoricon.c:2653
#define WM_RBUTTONUP
Definition: winuser.h:1779
#define WM_MOUSEMOVE
Definition: winuser.h:1774
#define WM_LBUTTONDOWN
Definition: winuser.h:1775
UINT_PTR WINAPI SetTimer(_In_opt_ HWND, _In_ UINT_PTR, _In_ UINT, _In_opt_ TIMERPROC)
#define WM_NCCREATE
Definition: winuser.h:1682
#define WM_RBUTTONDOWN
Definition: winuser.h:1778
#define WM_TIMER
Definition: winuser.h:1741
#define WM_LBUTTONUP
Definition: winuser.h:1776
#define PostMessage
Definition: winuser.h:5831
#define WM_NCDESTROY
Definition: winuser.h:1683
#define WM_KEYDOWN
Definition: winuser.h:1714
BOOL WINAPI KillTimer(_In_opt_ HWND, _In_ UINT_PTR)
#define WM_MBUTTONUP
Definition: winuser.h:1782
BOOL WINAPI DestroyWindow(_In_ HWND)
#define WM_SYSKEYDOWN
Definition: winuser.h:1718
#define WM_MBUTTONDOWN
Definition: winuser.h:1781

Referenced by InitScreenSaveClass().

◆ RandomGlyph()

GLYPH RandomGlyph ( int  intensity)

Definition at line 45 of file matrix.c.

46{
47 return GLYPH_REDRAW | (intensity << 8) | (crc_rand() % NUM_GLYPHS);
48}
#define NUM_GLYPHS
Definition: globals.h:16

Referenced by DrawMatrixMessage(), and ScrollMatrixColumn().

◆ RandomMatrixColumn()

void RandomMatrixColumn ( MATRIX_COLUMN col)

Definition at line 147 of file matrix.c.

148{
149 int i, y;
150
151 for(i = 1, y = 0; i < 16; i++)
152 {
153 // find a run
154 while(GlyphIntensity(col->glyph[y]) < MAX_INTENSITY-1 && y < col->length)
155 y++;
156
157 if(y >= col->length)
158 break;
159
160 col->glyph[y] = (col->glyph[y] & 0xff00) | (crc_rand() % NUM_GLYPHS);
161 col->glyph[y] |= GLYPH_REDRAW;
162
163 y += crc_rand() % 10;
164 }
165}
GLuint GLsizei GLsizei * length
Definition: glext.h:6040
GLsizei GLenum const GLvoid GLsizei GLenum GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLint GLint GLint GLshort GLshort GLshort GLubyte GLubyte GLubyte GLuint GLuint GLuint GLushort GLushort GLushort GLbyte GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLfloat GLint GLint GLint GLint GLshort GLshort GLshort GLshort GLubyte GLubyte GLubyte GLubyte GLuint GLuint GLuint GLuint GLushort GLushort GLushort GLushort GLboolean const GLdouble const GLfloat const GLint const GLshort const GLbyte const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLdouble const GLfloat const GLfloat const GLint const GLint const GLshort const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort GLenum GLenum GLenum GLfloat GLenum GLint GLenum GLenum GLenum GLfloat GLenum GLenum GLint GLenum GLfloat GLenum GLint GLint GLushort GLenum GLenum GLfloat GLenum GLenum GLint GLfloat const GLubyte GLenum GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLint GLint GLsizei GLsizei GLint GLenum GLenum const GLvoid GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLenum const GLdouble GLenum GLenum const GLfloat GLenum GLenum const GLint GLsizei GLuint GLfloat GLuint GLbitfield GLfloat GLint GLuint GLboolean GLenum GLfloat GLenum GLbitfield GLenum GLfloat GLfloat GLint GLint const GLfloat GLenum GLfloat GLfloat GLint GLint GLfloat GLfloat GLint GLint const GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat const GLdouble const GLfloat const GLdouble const GLfloat GLint i
Definition: glfuncs.h:248
#define MAX_INTENSITY
Definition: globals.h:15
GLYPH * glyph
Definition: matrix.h:39
int length
Definition: matrix.h:38

Referenced by DecodeMatrix().

◆ RedrawBlip()

void RedrawBlip ( GLYPH glypharr,
int  blippos 
)

Definition at line 50 of file matrix.c.

51{
52 glypharr[blippos+0] |= GLYPH_REDRAW;
53 glypharr[blippos+1] |= GLYPH_REDRAW;
54 glypharr[blippos+8] |= GLYPH_REDRAW;
55 glypharr[blippos+9] |= GLYPH_REDRAW;
56}

Referenced by ScrollMatrixColumn().

◆ RedrawMatrixColumn()

void RedrawMatrixColumn ( MATRIX_COLUMN col,
MATRIX matrix,
HDC  hdc,
int  xpos 
)

Definition at line 176 of file matrix.c.

177{
178 int y;
179
180 // loop down the length of the column redrawing only what needs doing
181 for(y = 0; y < col->length; y++)
182 {
183 GLYPH glyph = col->glyph[y];
184
185 // does this glyph (character) need to be redrawn?
186 if(glyph & GLYPH_REDRAW)
187 {
188 if((y == col->blippos+0 || y == col->blippos+1 ||
189 y == col->blippos+8 || y == col->blippos+9) &&
190 GlyphIntensity(glyph) >= MAX_INTENSITY-1)
191 glyph |= MAX_INTENSITY << 8;
192
193 DrawGlyph(matrix, hdc, xpos, y * GLYPH_HEIGHT, glyph);
194
195 // clear redraw state
196 col->glyph[y] &= ~GLYPH_REDRAW;
197 }
198 }
199}
void DrawGlyph(MATRIX *matrix, HDC hdc, int xpos, int ypos, GLYPH glyph)
Definition: matrix.c:167
int blippos
Definition: matrix.h:35

Referenced by DecodeMatrix().

◆ ScrollMatrixColumn()

void ScrollMatrixColumn ( MATRIX_COLUMN col)

Definition at line 58 of file matrix.c.

59{
60 int y;
61 GLYPH lastglyph = 0;
62 GLYPH thisglyph;
63
64 // wait until we are allowed to scroll
65 if(col->started == FALSE)
66 {
67 if(--col->countdown <= 0)
68 col->started = TRUE;
69
70 return;
71 }
72
73 // "seed" the glyph-run
74 lastglyph = col->state ? (GLYPH)0 : (GLYPH)(MAX_INTENSITY << 8);
75
76 //
77 // loop over the entire length of the column, looking for changes
78 // in intensity/darkness. This change signifies the start/end
79 // of a run of glyphs.
80 //
81 for(y = 0; y < col->length; y++)
82 {
83 thisglyph = col->glyph[y];
84
85 // bottom-most part of "run". Insert a new character (glyph)
86 // at the end to lengthen the run down the screen..gives the
87 // impression that the run is "falling" down the screen
88 if(GlyphIntensity(thisglyph) < GlyphIntensity(lastglyph) &&
89 GlyphIntensity(thisglyph) == 0)
90 {
91 col->glyph[y] = RandomGlyph(MAX_INTENSITY - 1);
92 y++;
93 }
94 // top-most part of "run". Delete a character off the top by
95 // darkening the glyph until it eventually disappears (turns black).
96 // this gives the effect that the run as dropped downwards
97 else if(GlyphIntensity(thisglyph) > GlyphIntensity(lastglyph))
98 {
99 col->glyph[y] = DarkenGlyph(thisglyph);
100
101 // if we've just darkened the last bit, skip on so
102 // the whole run doesn't go dark
103 if(GlyphIntensity(thisglyph) == MAX_INTENSITY - 1)
104 y++;
105 }
106
107 lastglyph = col->glyph[y];
108 }
109
110 // change state from blanks <-> runs when the current run as expired
111 if(--col->runlen <= 0)
112 {
113 if(col->state ^= 1)
114 col->runlen = crc_rand() % (3 * DENSITY/2) + DENSITY_MIN;
115 else
116 col->runlen = crc_rand() % (DENSITY_MAX+1-DENSITY) + (DENSITY_MIN*2);
117 }
118
119 //
120 // make a "blip" run down this column at double-speed
121 //
122
123 // mark current blip as redraw so it gets "erased"
124 if(col->blippos >= 0 && col->blippos < col->length)
125 RedrawBlip(col->glyph, col->blippos);
126
127 // advance down screen at double-speed
128 col->blippos += 2;
129
130 // if the blip gets to the end of a run, start it again (for a random
131 // length so that the blips never get synched together)
132 if(col->blippos >= col->bliplen)
133 {
134 col->bliplen = col->length + crc_rand() % 50;
135 col->blippos = 0;
136 }
137
138 // now redraw blip at new position
139 if(col->blippos >= 0 && col->blippos < col->length)
140 RedrawBlip(col->glyph, col->blippos);
141
142}
#define DENSITY_MAX
Definition: globals.h:11
#define DENSITY
Definition: globals.h:10
#define DENSITY_MIN
Definition: globals.h:12
void RedrawBlip(GLYPH *glypharr, int blippos)
Definition: matrix.c:50
GLYPH RandomGlyph(int intensity)
Definition: matrix.c:45
GLYPH DarkenGlyph(GLYPH glyph)
Definition: matrix.c:35
int countdown
Definition: matrix.h:30
BOOL state
Definition: matrix.h:29
int runlen
Definition: matrix.h:33
int bliplen
Definition: matrix.h:36
BOOL started
Definition: matrix.h:32

Referenced by DecodeMatrix().

◆ SetMatrix()

void SetMatrix ( HWND  hwnd,
MATRIX matrix 
)

Definition at line 294 of file matrix.c.

295{
297}
__int3264 LONG_PTR
Definition: mstsclib_h.h:276
#define SetWindowLongPtr
Definition: treelist.c:70

Variable Documentation

◆ _crc_reg

WORD _crc_reg = 0
static

Definition at line 17 of file matrix.c.

Referenced by crc_rand(), and InitScreenSaveClass().