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cyber.net interactivo 1997 March
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inter@ivo 1997-03.iso
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wing
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palanim.c_
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palanim.c
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C/C++ Source or Header
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1994-09-07
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1,017 lines
/**************************************************************************
PALANIM.C - A palette animation demo for WinG
**************************************************************************/
/**************************************************************************
(C) Copyright 1994 Microsoft Corp. All rights reserved.
You have a royalty-free right to use, modify, reproduce and
distribute the Sample Files (and/or any modified version) in
any way you find useful, provided that you agree that
Microsoft has no warranty obligations or liability for any
Sample Application Files which are modified.
**************************************************************************/
#include <windows.h>
#include <commdlg.h>
#include <wing.h>
#include "palanim.h"
#include "..\utils\utils.h"
/*----------------------------------------------------------------------------*\
| |
| g l o b a l v a r i a b l e s |
| |
\*----------------------------------------------------------------------------*/
static char szAppName[]="WinG Palette Animation App";
static HINSTANCE hInstApp;
static HWND hwndApp;
static HPALETTE hpalApp;
static BOOL fAppActive;
static HDC hdcOffscreen;
void far * gpBits;
struct {
BITMAPINFOHEADER InfoHeader;
RGBQUAD ColorTable[256];
} gInfo;
int fAnimatePalette = 0; // Don't animate
int fIncludeStatic = 0; // Use the static color entries
enum {Red, Green, Blue} gWashColor = Red;
PALETTEENTRY aPalette[256];
extern HBITMAP ghBitmapMonochrome;
#ifdef WIN32
#define _export
#endif
//*** Setting up SYSPAL_NOSTATIC
#define NumSysColors (sizeof(SysPalIndex)/sizeof(SysPalIndex[1]))
#define rgbBlack RGB(0,0,0)
#define rgbWhite RGB(255,255,255)
//*** These are the GetSysColor display element identifiers
static int SysPalIndex[] = {
COLOR_ACTIVEBORDER,
COLOR_ACTIVECAPTION,
COLOR_APPWORKSPACE,
COLOR_BACKGROUND,
COLOR_BTNFACE,
COLOR_BTNSHADOW,
COLOR_BTNTEXT,
COLOR_CAPTIONTEXT,
COLOR_GRAYTEXT,
COLOR_HIGHLIGHT,
COLOR_HIGHLIGHTTEXT,
COLOR_INACTIVEBORDER,
COLOR_INACTIVECAPTION,
COLOR_MENU,
COLOR_MENUTEXT,
COLOR_SCROLLBAR,
COLOR_WINDOW,
COLOR_WINDOWFRAME,
COLOR_WINDOWTEXT
};
//*** This array translates the display elements to black and white
static COLORREF MonoColors[] = {
rgbBlack,
rgbWhite,
rgbWhite,
rgbWhite,
rgbWhite,
rgbBlack,
rgbBlack,
rgbBlack,
rgbBlack,
rgbBlack,
rgbWhite,
rgbWhite,
rgbWhite,
rgbWhite,
rgbBlack,
rgbWhite,
rgbWhite,
rgbBlack,
rgbBlack
};
//*** This array holds the old color mapping so we can restore them
static COLORREF OldColors[NumSysColors];
/*----------------------------------------------------------------------------*\
| |
| f u n c t i o n d e f i n i t i o n s |
| |
\*----------------------------------------------------------------------------*/
LONG FAR PASCAL _export AppWndProc(HWND hwnd,UINT msg,WPARAM wParam,LPARAM lParam);
int ErrMsg (LPSTR sz,...);
LONG AppCommand (HWND hwnd,UINT msg,WPARAM wParam,LPARAM lParam);
void AppExit(void);
BOOL AppIdle(void);
/***************************************************************************
Internal functions for the animation
*/
void CreateWashPalette(void);
void DibCreateWash(BITMAPINFOHEADER far *Info, void far *pBits);
void DibHorizontalLine(BITMAPINFOHEADER far *Info, void far *pBits,
int y, char unsigned color);
/***************************************************************************
Sample functions from wing.hlp
*/
HDC Create100x100WinGDC(void);
void Destroy100x100WinGDC(HDC hWinGDC);
void AppActivate(BOOL fActive);
HPALETTE CreateIdentityPalette(RGBQUAD aRGB[], int nColors);
/*----------------------------------------------------------------------------*\
| AppAbout( hDlg, uiMessage, wParam, lParam ) |
| |
| Description: |
| This function handles messages belonging to the "About" dialog box. |
| The only message that it looks for is WM_COMMAND, indicating the use |
| has pressed the "OK" button. When this happens, it takes down |
| the dialog box. |
| |
| Arguments: |
| hDlg window handle of about dialog window |
| uiMessage message number |
| wParam message-dependent |
| lParam message-dependent |
| |
| Returns: |
| TRUE if message has been processed, else FALSE |
| |
\*----------------------------------------------------------------------------*/
BOOL FAR PASCAL _export AppAbout(HWND hwnd,UINT msg,WPARAM wParam,LPARAM lParam)
{
switch (msg)
{
case WM_COMMAND:
if (LOWORD(wParam) == IDOK)
{
EndDialog(hwnd,TRUE);
}
break;
case WM_INITDIALOG:
return TRUE;
}
return FALSE;
}
/*----------------------------------------------------------------------------*\
| AppInit( hInst, hPrev) |
| |
| Description: |
| This is called when the application is first loaded into |
| memory. It performs all initialization that doesn't need to be done |
| once per instance. |
| |
| Arguments: |
| hInstance instance handle of current instance |
| hPrev instance handle of previous instance |
| |
| Returns: |
| TRUE if successful, FALSE if not |
| |
\*----------------------------------------------------------------------------*/
BOOL AppInit(HINSTANCE hInst,HINSTANCE hPrev,int sw,LPSTR szCmdLine)
{
WNDCLASS cls;
int dx,dy;
HBITMAP hbmOffscreen;
HMENU hMenu;
HDC Screen;
int PaletteDevice;
int nBitsPixel;
int nPlanes;
int nColorDepth;
/* Save instance handle for DialogBoxes */
hInstApp = hInst;
/* Refuse to run if this is a non-palettized device */
Screen = GetDC(0);
if (Screen)
{
PaletteDevice = GetDeviceCaps(Screen, RASTERCAPS) & RC_PALETTE;
nBitsPixel = GetDeviceCaps(Screen, BITSPIXEL);
nPlanes = GetDeviceCaps(Screen, PLANES);
nColorDepth = nBitsPixel * nPlanes;
ReleaseDC(0, Screen);
if ((8 != nColorDepth) || (0 == PaletteDevice))
{
MessageBox(0,
"Palette animation requires a palettized display device - change to 256 colors.",
"Non-palettized Display",
MB_OK);
return FALSE;
}
}
// Clear the System Palette.
ClearSystemPalette();
if (!hPrev)
{
/*
* Register a class for the main application window
*/
cls.hCursor = LoadCursor(NULL,IDC_ARROW);
cls.hIcon = LoadIcon(hInst,"AppIcon");
cls.lpszMenuName = "AppMenu";
cls.lpszClassName = szAppName;
cls.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
cls.hInstance = hInst;
cls.style = CS_BYTEALIGNCLIENT | CS_VREDRAW | CS_HREDRAW | CS_DBLCLKS;
cls.lpfnWndProc = (WNDPROC)AppWndProc;
cls.cbWndExtra = 0;
cls.cbClsExtra = 0;
if (!RegisterClass(&cls))
return FALSE;
}
dx = GetSystemMetrics (SM_CXSCREEN) / 2;
dy = GetSystemMetrics (SM_CYSCREEN) / 2;
hwndApp = CreateWindow (szAppName, // Class name
szAppName, // Caption
WS_OVERLAPPEDWINDOW, // Style bits
CW_USEDEFAULT, 0, // Position
dx,dy, // Size
(HWND)NULL, // Parent window (no parent)
(HMENU)NULL, // use class menu
hInst, // handle to window instance
(LPSTR)NULL // no params to pass on
);
ShowWindow(hwndApp,sw);
//*** Create the WinGDC (actually 256x256)
hdcOffscreen = Create100x100WinGDC();
//*** Check the menu to reflect initial palette (red)
hMenu = GetMenu(hwndApp);
CheckMenuItem(hMenu, MENU_STATIC, fIncludeStatic ? MF_CHECKED : MF_UNCHECKED);
CheckMenuItem(hMenu, MENU_RED, MF_CHECKED);
CheckMenuItem(hMenu, MENU_GREEN, MF_UNCHECKED);
CheckMenuItem(hMenu, MENU_BLUE, MF_UNCHECKED);
//*** Hack to get the offscreen HBITMAP
hbmOffscreen = (HBITMAP)SelectObject(hdcOffscreen, ghBitmapMonochrome);
SelectObject(hdcOffscreen, hbmOffscreen);
//*** Initialize the DIB to a wash from top to bottom
gpBits = WinGGetDIBPointer(hbmOffscreen, (BITMAPINFO far *)&gInfo);
DibCreateWash(&gInfo.InfoHeader, gpBits);
//*** Reset the color palette
ClearSystemPalette();
CreateWashPalette();
return TRUE;
}
/*----------------------------------------------------------------------------*\
| AppExit() |
| |
| Description: |
| App is just about to exit, cleanup. |
| |
\*----------------------------------------------------------------------------*/
void AppExit()
{
if (hdcOffscreen)
Destroy100x100WinGDC(hdcOffscreen);
if (hpalApp)
DeleteObject(hpalApp);
//*** Be sure to restore the state on exit!
if (fIncludeStatic)
AppActivate(FALSE);
}
/*----------------------------------------------------------------------------*\
| WinMain( hInst, hPrev, lpszCmdLine, cmdShow ) |
| |
| Description: |
| The main procedure for the App. After initializing, it just goes |
| into a message-processing loop until it gets a WM_QUIT message |
| (meaning the app was closed). |
| |
| Arguments: |
| hInst instance handle of this instance of the app |
| hPrev instance handle of previous instance, NULL if first |
| szCmdLine ->null-terminated command line |
| cmdShow specifies how the window is initially displayed |
| |
| Returns: |
| The exit code as specified in the WM_QUIT message. |
| |
\*----------------------------------------------------------------------------*/
int PASCAL WinMain(HINSTANCE hInst, HINSTANCE hPrev, LPSTR szCmdLine, int sw)
{
MSG msg;
/* Call initialization procedure */
if (!AppInit(hInst,hPrev,sw,szCmdLine))
return FALSE;
/*
* Polling messages from event queue
*/
for (;;)
{
if (PeekMessage(&msg, NULL, 0, 0,PM_REMOVE))
{
if (msg.message == WM_QUIT)
break;
TranslateMessage(&msg);
DispatchMessage(&msg);
}
else
{
if (AppIdle())
WaitMessage();
}
}
AppExit();
return msg.wParam;
}
/*----------------------------------------------------------------------------*\
| AppIdle() |
| |
| Description: |
| Place to do idle time stuff. |
| |
\*----------------------------------------------------------------------------*/
BOOL AppIdle()
{
if (fAppActive)
{
return TRUE;
}
else
{
//
// we are a background app.
//
return TRUE; // nothing to do.
}
}
/*----------------------------------------------------------------------------*\
| AppPaint(hwnd, hdc) |
| |
| Description: |
| The paint function. |
| |
| Arguments: |
| hwnd window painting into |
| hdc display context to paint to |
| |
\*----------------------------------------------------------------------------*/
AppPaint (HWND hwnd, HDC hdc)
{
RECT rc;
GetClientRect(hwnd,&rc);
SetTextColor(hdc,GetSysColor(COLOR_WINDOWTEXT));
SetBkColor(hdc,GetSysColor(COLOR_WINDOW));
if (hdcOffscreen)
{
int i;
PALETTEENTRY aPalette[256];
RGBQUAD aPaletteRGB[256];
//*** BEFORE BLTTING, match the DIB color table to the
//*** current palette to match the animated palette
GetPaletteEntries(hpalApp, 0, 256, aPalette);
//*** Alas, palette entries are r-g-b, rgbquads are b-g-r
for (i=0; i<256; ++i)
{
aPaletteRGB[i].rgbRed = aPalette[i].peRed;
aPaletteRGB[i].rgbGreen = aPalette[i].peGreen;
aPaletteRGB[i].rgbBlue = aPalette[i].peBlue;
aPaletteRGB[i].rgbReserved = 0;
}
WinGSetDIBColorTable(hdcOffscreen, 0, 256, aPaletteRGB);
WinGBitBlt(hdc,0,0,256,256,hdcOffscreen,0,0);
}
return TRUE;
}
/*----------------------------------------------------------------------------*\
| AppWndProc( hwnd, uiMessage, wParam, lParam ) |
| |
| Description: |
| The window proc for the app's main (tiled) window. This processes all |
| of the parent window's messages. |
| |
\*----------------------------------------------------------------------------*/
LONG FAR PASCAL _export AppWndProc(HWND hwnd,UINT msg,WPARAM wParam,LPARAM lParam)
{
PAINTSTRUCT ps;
HDC hdc;
BOOL f;
static int CurtainY = 0;
switch (msg)
{
case WM_CREATE:
break;
case WM_ACTIVATEAPP:
fAppActive = (BOOL)wParam;
//*** Remap the system colors and deal with the palette
if (fIncludeStatic == 0)
{
AppActivate(fAppActive);
if (hpalApp)
{
hdc = GetDC(hwnd);
UnrealizeObject(hpalApp);
SelectPalette(hdc, hpalApp, FALSE);
RealizePalette(hdc);
ReleaseDC(hwnd, hdc);
}
}
break;
case WM_TIMER:
switch (wParam)
{
case 1:
//*** Animate or terminate the "falling black curtain"
{
if (CurtainY < 256)
{
DibHorizontalLine(&gInfo.InfoHeader, gpBits, CurtainY, 0);
CurtainY++;
}
else
{
CurtainY = 0;
DibCreateWash(&gInfo.InfoHeader, gpBits);
KillTimer(hwnd, wParam);
}
}
//*** The DIB has changed - redisplay it
InvalidateRect(hwnd, NULL, FALSE);
UpdateWindow(hwnd);
break;
case 2:
//*** Get the current palette
GetPaletteEntries(hpalApp, 0, 256, aPalette);
hdc = GetDC(hwnd);
if (fIncludeStatic)
{
//*** We'll rotate the middle 236 entries, leaving
//*** black and white at the top
aPalette[245] = aPalette[10];
SelectPalette(hdc, hpalApp, FALSE);
AnimatePalette(hpalApp, 10, 236, &aPalette[11]);
}
else
{
//*** We'll rotate the middle 254 entries, leaving
//*** black and white at the top
aPalette[255] = aPalette[1];
SelectPalette(hdc, hpalApp, FALSE);
AnimatePalette(hpalApp, 1, 254, &aPalette[2]);
}
ReleaseDC(hwnd, hdc);
InvalidateRect(hwnd, NULL, FALSE);
UpdateWindow(hwnd);
break;
}
break;
case WM_ERASEBKGND:
break;
case WM_INITMENU:
break;
case WM_COMMAND:
return AppCommand(hwnd,msg,wParam,lParam);
case WM_DESTROY:
PostQuitMessage(0);
break;
case WM_CLOSE:
break;
case WM_PALETTECHANGED:
if ((HWND)wParam == hwnd)
break;
// fall through to WM_QUERYNEWPALETTE
case WM_QUERYNEWPALETTE:
hdc = GetDC(hwnd);
if (hpalApp)
SelectPalette(hdc, hpalApp, FALSE);
f = RealizePalette(hdc);
ReleaseDC(hwnd,hdc);
if (f)
InvalidateRect(hwnd,NULL,TRUE);
return f;
case WM_PAINT:
hdc = BeginPaint(hwnd,&ps);
if (hpalApp)
{
SelectPalette(hdc, hpalApp, FALSE);
RealizePalette(hdc);
}
AppPaint (hwnd,hdc);
EndPaint(hwnd,&ps);
return 0L;
}
return DefWindowProc(hwnd,msg,wParam,lParam);
}
/*----------------------------------------------------------------------------*\
| AppCommand(hwnd, msg, wParam, lParam ) |
| |
| Description: |
| Handles WM_COMMAND messages for the main window (hwndApp) |
| of the parent window's messages. |
| |
\*----------------------------------------------------------------------------*/
LONG AppCommand (HWND hwnd,UINT msg,WPARAM wParam,LPARAM lParam)
{
HMENU hMenu;
HPALETTE hPal = GetStockObject(DEFAULT_PALETTE);
HDC hdc = GetDC(hwnd);
switch(wParam)
{
case MENU_ABOUT:
DialogBox(hInstApp,"AppAbout",hwnd,AppAbout);
break;
case MENU_EXIT:
PostMessage(hwnd,WM_CLOSE,0,0L);
break;
case MENU_RED:
case MENU_GREEN:
case MENU_BLUE:
hMenu = GetMenu(hwndApp);
CheckMenuItem(hMenu, MENU_RED, MF_UNCHECKED);
CheckMenuItem(hMenu, MENU_GREEN, MF_UNCHECKED);
CheckMenuItem(hMenu, MENU_BLUE, MF_UNCHECKED);
CheckMenuItem(hMenu, wParam, MF_CHECKED);
if (wParam == MENU_RED) gWashColor = Red;
else if (wParam == MENU_GREEN) gWashColor = Green;
else gWashColor = Blue;
//*** Delete the old palette and create a new one
hPal = SelectPalette(hdc, hPal, FALSE);
DeleteObject(hPal);
CreateWashPalette();
InvalidateRect(hwnd, NULL, FALSE);
UpdateWindow(hwnd);
break;
case MENU_PALETTE:
hMenu = GetMenu(hwndApp);
if (fAnimatePalette)
{
fAnimatePalette = 0;
CheckMenuItem(hMenu, MENU_PALETTE, MF_UNCHECKED);
KillTimer(hwnd, 2);
}
else
{
fAnimatePalette = 1;
CheckMenuItem(hMenu, MENU_PALETTE, MF_CHECKED);
SetTimer(hwnd, 2, 1, 0);
}
break;
case MENU_CURTAIN:
//*** Just start off the falling curtain
SetTimer(hwnd, 1, 10, 0);
break;
case MENU_STATIC:
hMenu = GetMenu(hwndApp);
if (fIncludeStatic)
{
//*** Flag no static color use
fIncludeStatic = 0;
CheckMenuItem(hMenu, MENU_STATIC, MF_UNCHECKED);
//*** Remap the system colors
AppActivate(TRUE);
}
else
{
//*** Flag static color use
fIncludeStatic = 1;
CheckMenuItem(hMenu, MENU_STATIC, MF_CHECKED);
//*** Remap the system colors to normal
AppActivate(FALSE);
}
//*** Delete the old palette and create a new one
hPal = SelectPalette(hdc, hPal, FALSE);
DeleteObject(hPal);
CreateWashPalette();
InvalidateRect(hwnd, NULL, FALSE);
UpdateWindow(hwnd);
break;
}
ReleaseDC(hwnd, hdc);
return 0L;
}
/*----------------------------------------------------------------------------*\
| ErrMsg - Opens a Message box with a error message in it. The user can |
| select the OK button to continue |
\*----------------------------------------------------------------------------*/
int ErrMsg (LPSTR sz,...)
{
char ach[128];
wvsprintf (ach,sz,(LPSTR)(&sz+1)); /* Format the string */
MessageBox(hwndApp,ach,szAppName,MB_OK|MB_ICONEXCLAMATION|MB_TASKMODAL);
return FALSE;
}
/***************************************************************************
Palette Creation
Create three palettes of solid color washes, with or without statics
*/
void CreateWashPalette(void)
{
RGBQUAD aWash[256];
int i;
//*** Fill in the palette with a 256-color ramp
for (i=0; i<256; ++i)
{
aWash[i].rgbRed = aWash[i].rgbBlue = aWash[i].rgbGreen = 0;
switch (gWashColor)
{
case Red:
aWash[i].rgbRed = i;
break;
case Green:
aWash[i].rgbGreen = i;
break;
case Blue:
aWash[i].rgbBlue = i;
break;
}
aWash[i].rgbReserved = 0;
}
//*** Turn the wash into a palette
if (hpalApp)
DeleteObject(hpalApp);
hpalApp = CreateIdentityPalette(aWash, 256);
}
/***************************************************************************
Dib drawing routines
One creates a wash of color from left to right,
the other draws a horizontal line at a given Y in the DIB
*/
void DibCreateWash(BITMAPINFOHEADER far *Info, void far *pBits)
{
unsigned int dxBytes = DibWidthBytes(Info);
int dxWidth = DibWidth(Info);
int dyLines = (int)Info->biHeight;
int i, j;
char unsigned huge *pScanline = (char unsigned huge *)pBits;
char unsigned huge *pPixel;
if (dyLines < 0)
{
dyLines = -dyLines;
}
for (i=0; i<dyLines; ++i)
{
//*** Point to the beginning of this scan line in the DIB
pPixel = pScanline;
//*** Step through this scan line and fill it
//*** Wash up on the evens, then down on the odds
for (j=0; j<256; j+=2)
{
*pPixel = (char unsigned)(j % 256);
pPixel++;
}
for (j=253; j>0; j-=2)
{
*pPixel = (char unsigned)(j % 256);
pPixel++;
}
//*** Make the last column white
*pPixel = 255;
//*** Move pointer to the next scan line
pScanline += dxBytes;
}
}
void DibHorizontalLine(BITMAPINFOHEADER far *Info, void far *pBits,
int y, char unsigned color)
{
unsigned int dxBytes = DibWidthBytes(Info);
char unsigned huge *pPixel;
int dxWidth = DibWidth(Info);
int dyLines = (int)Info->biHeight;
int i;
//*** Account for top-down and bottom-up DIBs
if (dyLines > 0)
{
pPixel = (char unsigned huge *)pBits +
(long)(dyLines - 1 - y) * (long)dxBytes;
}
else
{
pPixel = (char unsigned huge *)pBits +
(long)y * (long)dxBytes;
}
for (i=0; i<dxWidth; ++i)
{
*pPixel = color;
pPixel++;
}
}
//*** Creating an identity palette code here
HPALETTE CreateIdentityPalette(RGBQUAD aRGB[], int nColors)
{
int i;
struct
{
WORD Version;
WORD NumberOfEntries;
PALETTEENTRY aEntries[256];
} Palette =
{
0x300,
256
};
HDC hdc = GetDC(NULL);
//*** For SYSPAL_NOSTATIC, just copy the color table into
//*** a PALETTEENTRY array and replace the first and last entries
//*** with black and white
if (GetSystemPaletteUse(hdc) == SYSPAL_NOSTATIC)
{
//*** Fill in the palette with the given values, marking each
//*** as PC_RESERVED
for(i = 0; i < nColors; i++)
{
Palette.aEntries[i].peRed = aRGB[i].rgbRed;
Palette.aEntries[i].peGreen = aRGB[i].rgbGreen;
Palette.aEntries[i].peBlue = aRGB[i].rgbBlue;
Palette.aEntries[i].peFlags = PC_RESERVED;
}
//*** Mark any remaining entries PC_RESERVED
for (; i < 256; ++i)
{
Palette.aEntries[i].peFlags = PC_RESERVED;
}
//*** Make sure the last entry is white
//*** This may replace an entry in the array!
Palette.aEntries[255].peRed = 255;
Palette.aEntries[255].peGreen = 255;
Palette.aEntries[255].peBlue = 255;
Palette.aEntries[255].peFlags = 0;
//*** And the first is black
//*** This may replace an entry in the array!
Palette.aEntries[0].peRed = 0;
Palette.aEntries[0].peGreen = 0;
Palette.aEntries[0].peBlue = 0;
Palette.aEntries[0].peFlags = 0;
}
else
//*** For SYSPAL_STATIC, get the twenty static colors into
//*** the array, then fill in the empty spaces with the
//*** given color table
{
int nStaticColors;
int nUsableColors;
//*** Get the static colors
nStaticColors = GetDeviceCaps(hdc, NUMCOLORS);
GetSystemPaletteEntries(hdc, 0, 256, Palette.aEntries);
//*** Set the peFlags of the lower static colors to zero
nStaticColors = nStaticColors / 2;
for (i=0; i<nStaticColors; i++)
Palette.aEntries[i].peFlags = 0;
//*** Fill in the entries from the given color table
nUsableColors = nColors - nStaticColors;
for (; i<nUsableColors; i++)
{
Palette.aEntries[i].peRed = aRGB[i].rgbRed;
Palette.aEntries[i].peGreen = aRGB[i].rgbGreen;
Palette.aEntries[i].peBlue = aRGB[i].rgbBlue;
Palette.aEntries[i].peFlags = PC_RESERVED;
}
//*** Mark any empty entries as PC_RESERVED
for (; i<256 - nStaticColors; i++)
Palette.aEntries[i].peFlags = PC_RESERVED;
//*** Set the peFlags of the upper static colors to zero
for (i = 256 - nStaticColors; i<256; i++)
Palette.aEntries[i].peFlags = 0;
}
ReleaseDC(NULL, hdc);
//*** Create the palette
return CreatePalette((LOGPALETTE *)&Palette);
}
//*** AppActivate sets the system palette use and
//*** remaps the system colors accordingly.
void AppActivate(BOOL fActive)
{
HDC hdc;
int i;
//*** Just use the screen DC
hdc = GetDC(NULL);
//*** If the app is activating, save the current color mapping
//*** and switch to SYSPAL_NOSTATIC
if (fActive && GetSystemPaletteUse(hdc) == SYSPAL_STATIC)
{
//*** Store the current mapping
for (i=0; i<NumSysColors; i++)
OldColors[i] = GetSysColor(SysPalIndex[i]);
//*** Switch to SYSPAL_NOSTATIC and remap the colors
SetSystemPaletteUse(hdc, SYSPAL_NOSTATIC);
SetSysColors(NumSysColors, SysPalIndex, MonoColors);
}
else if (!fActive)
{
//*** Always switch back to SYSPAL_STATIC and the old mapping
SetSystemPaletteUse(hdc, SYSPAL_STATIC);
SetSysColors(NumSysColors, SysPalIndex, OldColors);
}
//*** Be sure to release the DC!
ReleaseDC(NULL,hdc);
}
//*** Creating an offscreen buffer (WinGCreateBitmap)
HBITMAP ghBitmapMonochrome = 0;
HDC Create100x100WinGDC(void)
{
HDC hWinGDC;
HBITMAP hBitmapNew;
struct {
BITMAPINFOHEADER InfoHeader;
RGBQUAD ColorTable[256];
} Info;
void far *pSurfaceBits;
// Set up an optimal bitmap
if (WinGRecommendDIBFormat((BITMAPINFO far *)&Info) == FALSE)
return 0;
// Set the width and height of the DIB but preserve the
// sign of biHeight in case top-down DIBs are faster
// NOTE: Changed 100 to 256 for my purposes...
Info.InfoHeader.biHeight *= 256;
Info.InfoHeader.biWidth = 256;
// Create a WinGDC and Bitmap, then select away
hWinGDC = WinGCreateDC();
if (hWinGDC)
{
hBitmapNew = WinGCreateBitmap(hWinGDC,
(BITMAPINFO far *)&Info, &pSurfaceBits);
if (hBitmapNew)
{
ghBitmapMonochrome = (HBITMAP)SelectObject(hWinGDC,
hBitmapNew);
}
else
{
DeleteDC(hWinGDC);
hWinGDC = 0;
}
}
return hWinGDC;
}
void Destroy100x100WinGDC(HDC hWinGDC)
{
HBITMAP hBitmapOld;
if (hWinGDC && ghBitmapMonochrome)
{
// Select the stock 1x1 monochrome bitmap back in
hBitmapOld = (HBITMAP)SelectObject(hWinGDC,
ghBitmapMonochrome);
DeleteObject(hBitmapOld);
DeleteDC(hWinGDC);
}
}
