reactos/rosapps/applications/screensavers/matrix/matrix.c
Colin Finck 646ada92cc Move cylfrac, matrix, scrmsave and starfield to rosapps as proposed on the mailing list. New screensavers should only go there now.
I created an "applications/screensavers" directory for that, eventually rosapps should get a similar directory structure to reactos.

Also changed the appropriate parts in reactos.dff.

svn path=/trunk/; revision=29961
2007-10-29 21:30:02 +00:00

447 lines
9.8 KiB
C

//
// matrix.c
//
// Matrix-window implementation
//
#include <windows.h>
#include <windowsx.h>
#include <tchar.h>
#include "globals.h"
#include "message.h"
#include "matrix.h"
#include "resource.h"
void DoMatrixMessage(HDC hdc, MATRIX *matrix);
// pseudo-random number generator, based on 16bit CRC algorithm
static WORD _crc_reg = 0;
int crc_rand()
{
const WORD mask = 0xb400;
if(_crc_reg & 1)
_crc_reg = (_crc_reg >> 1) ^ mask;
else
_crc_reg = (_crc_reg >> 1);
return _crc_reg;
}
int GlyphIntensity(GLYPH glyph)
{
return (int)((glyph & 0x7f00) >> 8);
}
GLYPH DarkenGlyph(GLYPH glyph)
{
int intensity = GlyphIntensity(glyph);
if(intensity > 0)
return GLYPH_REDRAW | ((intensity - 1) << 8) | (glyph & 0x00FF);
else
return glyph;
}
GLYPH RandomGlyph(int intensity)
{
return GLYPH_REDRAW | (intensity << 8) | (crc_rand() % NUM_GLYPHS);
}
void RedrawBlip(GLYPH *glypharr, int blippos)
{
glypharr[blippos+0] |= GLYPH_REDRAW;
glypharr[blippos+1] |= GLYPH_REDRAW;
glypharr[blippos+8] |= GLYPH_REDRAW;
glypharr[blippos+9] |= GLYPH_REDRAW;
}
void ScrollMatrixColumn(MATRIX_COLUMN *col)
{
int y;
GLYPH lastglyph = 0;
GLYPH thisglyph;
// wait until we are allowed to scroll
if(col->started == FALSE)
{
if(--col->countdown <= 0)
col->started = TRUE;
return;
}
// "seed" the glyph-run
lastglyph = col->state ? (GLYPH)0 : (GLYPH)(MAX_INTENSITY << 8);
//
// loop over the entire length of the column, looking for changes
// in intensity/darkness. This change signifies the start/end
// of a run of glyphs.
//
for(y = 0; y < col->length; y++)
{
thisglyph = col->glyph[y];
// bottom-most part of "run". Insert a new character (glyph)
// at the end to lengthen the run down the screen..gives the
// impression that the run is "falling" down the screen
if(GlyphIntensity(thisglyph) < GlyphIntensity(lastglyph) &&
GlyphIntensity(thisglyph) == 0)
{
col->glyph[y] = RandomGlyph(MAX_INTENSITY - 1);
y++;
}
// top-most part of "run". Delete a character off the top by
// darkening the glyph until it eventually disappears (turns black).
// this gives the effect that the run as dropped downwards
else if(GlyphIntensity(thisglyph) > GlyphIntensity(lastglyph))
{
col->glyph[y] = DarkenGlyph(thisglyph);
// if we've just darkened the last bit, skip on so
// the whole run doesn't go dark
if(GlyphIntensity(thisglyph) == MAX_INTENSITY - 1)
y++;
}
lastglyph = col->glyph[y];
}
// change state from blanks <-> runs when the current run as expired
if(--col->runlen <= 0)
{
if(col->state ^= 1)
col->runlen = crc_rand() % (3 * DENSITY/2) + DENSITY_MIN;
else
col->runlen = crc_rand() % (DENSITY_MAX+1-DENSITY) + (DENSITY_MIN*2);
}
//
// make a "blip" run down this column at double-speed
//
// mark current blip as redraw so it gets "erased"
if(col->blippos >= 0 && col->blippos < col->length)
RedrawBlip(col->glyph, col->blippos);
// advance down screen at double-speed
col->blippos += 2;
// if the blip gets to the end of a run, start it again (for a random
// length so that the blips never get synched together)
if(col->blippos >= col->bliplen)
{
col->bliplen = col->length + crc_rand() % 50;
col->blippos = 0;
}
// now redraw blip at new position
if(col->blippos >= 0 && col->blippos < col->length)
RedrawBlip(col->glyph, col->blippos);
}
//
// randomly change a small collection glyphs in a column
//
void RandomMatrixColumn(MATRIX_COLUMN *col)
{
int i, y;
for(i = 1, y = 0; i < 16; i++)
{
// find a run
while(GlyphIntensity(col->glyph[y]) < MAX_INTENSITY-1 && y < col->length)
y++;
if(y >= col->length)
break;
col->glyph[y] = (col->glyph[y] & 0xff00) | (crc_rand() % NUM_GLYPHS);
col->glyph[y] |= GLYPH_REDRAW;
y += crc_rand() % 10;
}
}
void DrawGlyph(MATRIX *matrix, HDC hdc, int xpos, int ypos, GLYPH glyph)
{
int intensity = GlyphIntensity(glyph);
int glyphidx = glyph & 0xff;
BitBlt(hdc, xpos, ypos, GLYPH_WIDTH, GLYPH_HEIGHT, matrix->hdcBitmap,
glyphidx * GLYPH_WIDTH, intensity * GLYPH_HEIGHT, SRCCOPY);
}
void RedrawMatrixColumn(MATRIX_COLUMN *col, MATRIX *matrix, HDC hdc, int xpos)
{
int y;
// loop down the length of the column redrawing only what needs doing
for(y = 0; y < col->length; y++)
{
GLYPH glyph = col->glyph[y];
// does this glyph (character) need to be redrawn?
if(glyph & GLYPH_REDRAW)
{
if((y == col->blippos+0 || y == col->blippos+1 ||
y == col->blippos+8 || y == col->blippos+9) &&
GlyphIntensity(glyph) >= MAX_INTENSITY-1)
glyph |= MAX_INTENSITY << 8;
DrawGlyph(matrix, hdc, xpos, y * GLYPH_HEIGHT, glyph);
// clear redraw state
col->glyph[y] &= ~GLYPH_REDRAW;
}
}
}
void DecodeMatrix(HWND hwnd, MATRIX *matrix)
{
int x;
HDC hdc = GetDC(hwnd);
for(x = 0; x < matrix->numcols; x++)
{
RandomMatrixColumn(&matrix->column[x]);
ScrollMatrixColumn(&matrix->column[x]);
RedrawMatrixColumn(&matrix->column[x], matrix, hdc, x * GLYPH_WIDTH);
}
if(matrix->message)
DoMatrixMessage(hdc, matrix);
ReleaseDC(hwnd, hdc);
}
//
// Allocate matrix structures
//
MATRIX *CreateMatrix(HWND hwnd, int width, int height)
{
MATRIX *matrix;
HDC hdc;
int x, y;
int rows = height / GLYPH_HEIGHT + 1;
int cols = width / GLYPH_WIDTH + 1;
// allocate matrix!
if((matrix = malloc(sizeof(MATRIX) + sizeof(MATRIX_COLUMN) * cols)) == 0)
return 0;
matrix->numcols = cols;
matrix->numrows = rows;
matrix->width = width;
matrix->height = height;
for(x = 0; x < cols; x++)
{
matrix->column[x].length = rows;
matrix->column[x].started = FALSE;
matrix->column[x].countdown = crc_rand() % 100;
matrix->column[x].state = crc_rand() % 2;
matrix->column[x].runlen = crc_rand() % 20 + 3;
matrix->column[x].glyph = malloc(sizeof(GLYPH) * (rows+16));
for(y = 0; y < rows; y++)
matrix->column[x].glyph[y] = 0;//;
}
// Load bitmap!!
hdc = GetDC(NULL);
matrix->hbmBitmap = LoadBitmap(GetModuleHandle(0), MAKEINTRESOURCE(IDB_BITMAP1));
matrix->hdcBitmap = CreateCompatibleDC(hdc);
SelectObject(matrix->hdcBitmap, matrix->hbmBitmap);
ReleaseDC(NULL, hdc);
// Create a message for this window...only if we are
// screen-saving (not if in preview mode)
if(GetParent(hwnd) == 0)
matrix->message = InitMatrixMessage(hwnd, matrix->numcols, matrix->numrows);
else
matrix->message = 0;
return matrix;
}
//
// Free up matrix structures
//
void DestroyMatrix(MATRIX *matrix)
{
int x;
// free the matrix columns
for(x = 0; x < matrix->numcols; x++)
free(matrix->column[x].glyph);
DeleteDC(matrix->hdcBitmap);
DeleteObject(matrix->hbmBitmap);
// now delete the matrix!
free(matrix);
}
MATRIX *GetMatrix(HWND hwnd)
{
return (MATRIX *)GetWindowLong(hwnd, 0);
}
void SetMatrix(HWND hwnd, MATRIX *matrix)
{
SetWindowLong(hwnd, 0, (LONG)matrix);
}
//
// Window procedure for one matrix (1 per screen)
//
LRESULT WINAPI MatrixWndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
static POINT ptLast;
static POINT ptCursor;
static BOOL fFirstTime = TRUE;
MATRIX *matrix = GetMatrix(hwnd);
switch(msg)
{
// window creation
case WM_NCCREATE:
// create the matrix based on how big this window is
matrix = CreateMatrix(hwnd, ((CREATESTRUCT *)lParam)->cx, ((CREATESTRUCT *)lParam)->cy);
// failed to allocate? stop window creation!
if(matrix == 0)
return FALSE;
SetMatrix(hwnd, matrix);
// start off an animation timer
SetTimer(hwnd, 0xdeadbeef, ((SPEED_MAX - g_nMatrixSpeed) + SPEED_MIN) * 10, 0);
return TRUE;
// window being destroyed, cleanup
case WM_NCDESTROY:
DestroyMatrix(matrix);
PostQuitMessage(0);
return 0;
// animation timer has gone off, redraw the matrix!
case WM_TIMER:
DecodeMatrix(hwnd, matrix);
return 0;
// break out of screen-saver if any keyboard activity
case WM_KEYDOWN:
case WM_SYSKEYDOWN:
PostMessage(hwnd, WM_CLOSE, 0, 0);
return 0;
// break out of screen-saver if any mouse activity
case WM_LBUTTONDOWN:
case WM_LBUTTONUP:
case WM_RBUTTONDOWN:
case WM_RBUTTONUP:
case WM_MBUTTONDOWN:
case WM_MBUTTONUP:
case WM_MOUSEMOVE:
// If we've got a parent then we must be a preview
if(GetParent(hwnd) != 0)
return 0;
if(fFirstTime)
{
GetCursorPos(&ptLast);
fFirstTime = FALSE;
}
GetCursorPos(&ptCursor);
// if the mouse has moved more than 3 pixels then exit
if(abs(ptCursor.x - ptLast.x) >= 3 || abs(ptCursor.y - ptLast.y) >= 3)
PostMessage(hwnd, WM_CLOSE, 0, 0);
ptLast = ptCursor;
return 0;
// someone wants to close us...see if it's ok
case WM_CLOSE:
if(VerifyPassword(hwnd))
{
KillTimer(hwnd, 0xdeadbeef);
DestroyWindow(hwnd);
}
return 0;
}
return DefWindowProc(hwnd, msg, wParam, lParam);
}
HWND CreateScreenSaveWnd(HWND hwndParent, RECT *rect)
{
DWORD dwStyle = hwndParent ? WS_CHILD : WS_POPUP;
#ifdef _DEBUG
DWORD dwStyleEx = 0;
#else
DWORD dwStyleEx = WS_EX_TOPMOST;
#endif
if(hwndParent)
GetClientRect(hwndParent, rect);
return CreateWindowEx( dwStyleEx,
APPNAME,
0,
WS_VISIBLE | dwStyle,
rect->left,
rect->top,
rect->right - rect->left,
rect->bottom - rect->top,
hwndParent,
0,
GetModuleHandle(0),
0
);
}
//
// Initialize class for matrix window
//
void InitScreenSaveClass(BOOL fPreview)
{
WNDCLASSEX wcx;
wcx.cbSize = sizeof(WNDCLASSEX);
wcx.style = 0;
wcx.lpfnWndProc = MatrixWndProc;
wcx.cbClsExtra = 0;
wcx.cbWndExtra = sizeof(MATRIX *);
wcx.hInstance = GetModuleHandle(0);
wcx.hIcon = 0;
wcx.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
wcx.lpszMenuName = 0;
wcx.lpszClassName = APPNAME;
wcx.hIconSm = 0;
if(fPreview)
wcx.hCursor = LoadCursor(0, IDC_ARROW);
else
wcx.hCursor = LoadCursor(wcx.hInstance, MAKEINTRESOURCE(IDC_BLANKCURSOR));
// initialize the crc register used for "random" number generation
_crc_reg = (WORD)GetTickCount();
RegisterClassEx(&wcx);
}