726 lines
19 KiB
C
726 lines
19 KiB
C
/******************************Module*Header*******************************\
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* Module Name: dispdib32.c
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*
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* Fakes the display of full screen videos.
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*
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*
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* Created: 23-03-94
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* Author: Stephen Estrop [StephenE]
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*
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* Copyright (c) 1994 Microsoft Corporation
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\**************************************************************************/
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#include <windows.h>
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#include "dispdib.h"
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#include "drawdib.h"
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/* -------------------------------------------------------------------------
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** Private constants
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** -------------------------------------------------------------------------
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*/
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#define CX_MAX_MOVIE_DEFAULT 640
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#define CY_MAX_MOVIE_DEFAULT 480
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/* -------------------------------------------------------------------------
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** Private functions prototypes
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** -------------------------------------------------------------------------
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*/
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LRESULT CALLBACK
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FullScreenWndProc(
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HWND hwnd,
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UINT message,
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WPARAM wParam,
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LPARAM lParam
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);
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LRESULT CALLBACK
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KeyboardHookProc(
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int nCode,
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WPARAM wParam,
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LPARAM lParam
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);
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UINT
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DisplayDibEnter(
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LPBITMAPINFOHEADER lpbi,
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UINT wFlags
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);
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void
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DisplayDibLeave(
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UINT wFlags
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);
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int
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DisplayCalcMovieMultiplier(
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int cxOriginal,
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int cyOriginal,
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DWORD dwCompression
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);
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/* -------------------------------------------------------------------------
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** Debugging stuff
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** -------------------------------------------------------------------------
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*/
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#if DBG
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void
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dprintf(
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LPSTR lpszFormat,
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...
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);
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int DebugLevel = 1;
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#define dpf( _x_ ) dprintf _x_
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#define dpf1( _x_ ) if (DebugLevel >= 1) {dprintf _x_ ;} else
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#define dpf2( _x_ ) if (DebugLevel >= 2) {dprintf _x_ ;} else
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#define dpf3( _x_ ) if (DebugLevel >= 3) {dprintf _x_ ;} else
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#define dpf4( _x_ ) if (DebugLevel >= 4) {dprintf _x_ ;} else
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#define dpf5( _x_ ) if (DebugLevel >= 5) {dprintf _x_ ;} else
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#else
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#define dpf( _x_ )
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#define dpf1( _x_ )
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#define dpf2( _x_ )
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#define dpf3( _x_ )
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#define dpf4( _x_ )
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#define dpf5( _x_ )
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#endif
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/* -------------------------------------------------------------------------
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** Private Globals
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** These are only valid in the process that started playing the movie.
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** -------------------------------------------------------------------------
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*/
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HWND hwndFullScreen;
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HDC hdcFullScreen;
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HDRAWDIB hdd;
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BOOL fClassRegistered;
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int dxScreen;
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int dyScreen;
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int iMovieSizeMultiplier;
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/* -------------------------------------------------------------------------
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** Global data shared between all processes that attach to this library.
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** This is required to make the keyboard hook work correctly.
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** -------------------------------------------------------------------------
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*/
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#pragma data_seg( ".sdata" )
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BOOL fStop;
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HHOOK hHookK;
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#pragma data_seg()
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/******************************Public*Routine******************************\
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* DisplayDib
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*
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* Just call DisplayDibEx
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*
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* History:
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* 23-03-94 - StephenE - Created
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*
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\**************************************************************************/
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UINT FAR PASCAL
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DisplayDib(
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LPBITMAPINFOHEADER lpbi,
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LPSTR lpBits,
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UINT wFlags
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)
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{
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dpf(( "Down level api, use DisplayDibEx" ));
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return DisplayDibEx( lpbi, 0, 0, lpBits, wFlags );
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}
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/******************************Public*Routine******************************\
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* @doc EXTERNAL DISPDIB
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*
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* @api UINT | DisplayDibEx | This function displays a 256-color bitmap on a
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* standard VGA display. It reduces the display resolution to 320-by-200
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* or 320-by-240 and uses the full screen to display the bitmap, clipping
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* and centering it as necessary. The function normally does not return to
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* the application until the user presses a key or clicks a mouse button.
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*
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* To call <f DisplayDibEx>, an application must be the active
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* application. All inactive applications and GDI screen updates
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* are suspended while <f DisplayDib> temporarily reconfigures
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* the display.
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*
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* @parm LPBITMAPINFO | lpbi | Specifies a pointer to a <t BITMAPINFO>
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* header describing the bitmap to be displayed.
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*
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* @parm int | x | x position to place DIB iff DISPLAYDIB_NOCENTER flags is set
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* the lower left is (0,0)
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*
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* @parm int | y | y position to place DIB iff DISPLAYDIB_NOCENTER flags is set
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* the lower left is (0,0)
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*
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* @parm LPSTR | lpBits | Specifies a pointer to the bitmap bits. If this
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* parameter is NULL, the bits are assumed to follow the
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* <t BITMAPINFO> structure pointed to by <p lpbi>.
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*
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* @parm UINT | wFlags | Specifies options for displaying the bitmap. Use
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* the following flags:
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*
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* @flag DISPLAYDIB_MODE_DEFAULT | Use the default mode (320 by 240)
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* to display the bitmap.
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* @flag DISPLAYDIB_MODE_320x200x8 | Use 320-by-200 mode to display
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* the bitmap.
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* @flag DISPLAYDIB_MODE_320x240x8 | Use 320-by-240 mode to display
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* the bitmap. This is the default.
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* @flag DISPLAYDIB_NOWAIT | Return immediately after displaying the
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* bitmap; don't wait for a key press or mouse click before returning.
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* @flag DISPLAYDIB_NOPALETTE | Ignore the palette associated
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* with the bitmap. You can use this flag when displaying a series
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* of bitmaps that use a common palette.
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* @flag DISPLAYDIB_NOCENTER | Don't center the image. The function
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* displays the bitmap in the lower-left corner of the display.
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* @flag DISPLAYDIB_NOIMAGE | Don't draw image
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* @flag DISPLAYDIB_ZOOM2 | Stretch image by 2
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* @flag DISPLAYDIB_DONTLOCKTASK | dont lock out other tasks
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* @flag DISPLAYDIB_TEST | dont do any thing just test for support
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* @flag DISPLAYDIB_BEGIN | Switch to the low-resolution
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* display mode and set the palette. The bitmap is not displayed.
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*
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* If you are displaying a series of images that use the same palette,
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* you can call <f DisplayDib> with this flag to prepare the display for
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* the bitmaps, then make a series of <f DisplayDib> calls with the
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* DISPLAYDIB_NOPALETTE flag. This technique
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* eliminates the screen flicker that occurs when the display is
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* switched between the low-resolution and standard VGA modes.
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* To return the display to standard VGA mode, subsequently
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* call <f DisplayDib> with the DISPLAYDIB_END flag.
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*
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* @flag DISPLAYDIB_END | Switch back to standard VGA mode
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* and return without displaying a bitmap. Signifies the end of multiple
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* calls to <f DisplayDib>. With this flag, you can specify
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* NULL for the <p lpbi> and <p lpBits> parameters.
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*
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* @rdesc Returns zero if successful, otherwise returns an error code.
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* Error codes are as follows:
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*
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* @flag DISPLAYDIB_NOTSUPPORTED | <f DisplayDib> is not supported
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* in the current mode.
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* @flag DISPLAYDIB_INVALIDDIB | The bitmap specified by
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* <p lpbi> is not a valid bitmap.
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* @flag DISPLAYDIB_INVALIDFORMAT | The bitmap specified by
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* <p lpbi> specifes a type of bitmap that is not supported.
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* @flag DISPLAYDIB_INVALIDTASK | The caller is an inactive application.
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* <f DisplayDib> can only be called by an active application.
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*
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* @comm The <f DisplayDib> function displays bitmaps described with
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* the Windows 3.0 <t BITMAPINFO> data structure in either BI_RGB
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* or BI_RLE8 format; it does not support bitmaps described with
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* the OS/2 <t BITMAPCOREHEADER> data structure.
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*
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* When <f DisplayDib> switches to a low-resolution display, it
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* disables the current display driver. As a result, you cannot use GDI
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* functions to update the display while <f DisplayDib> is displaying a
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* bitmap.
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*
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*
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* History:
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* 23-03-94 - StephenE - Created
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*
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\**************************************************************************/
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UINT FAR PASCAL
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DisplayDibEx(
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LPBITMAPINFOHEADER lpbi,
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int x,
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int y,
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LPSTR lpBits,
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UINT wFlags
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)
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{
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DWORD wNumColors;
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LONG yExt;
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LONG xExt;
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int xScreen,yScreen;
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/*
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** If not already done so:
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** Register our class and Create our window "fullscreen"
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*/
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if (wFlags & DISPLAYDIB_BEGIN) {
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dpf4(( "DISPLAYDIB_BEGIN..." ));
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return DisplayDibEnter( lpbi, wFlags );
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}
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/*
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** Just testing return OK
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*/
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else if (wFlags & DISPLAYDIB_TEST) {
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dpf1(( "lpbi->biCompression = 0x%X = %c%c%c%c",
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lpbi->biCompression,
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*((LPSTR)&lpbi->biCompression + 0),
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*((LPSTR)&lpbi->biCompression + 1),
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*((LPSTR)&lpbi->biCompression + 2),
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*((LPSTR)&lpbi->biCompression + 3) ));
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dpf4(( "DISPLAYDIB_TEST... returning OK" ));
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return DISPLAYDIB_NOERROR;
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}
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/*
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** Palette change message
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*/
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else if ( (wFlags & (DISPLAYDIB_NOWAIT | DISPLAYDIB_NOIMAGE)) ==
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(DISPLAYDIB_NOWAIT | DISPLAYDIB_NOIMAGE) ) {
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PALETTEENTRY ape[256];
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LPRGBQUAD lprgb;
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int i;
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lprgb = (LPRGBQUAD) ((LPBYTE) lpbi + lpbi->biSize);
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for (i = 0; i < (int) lpbi->biClrUsed; i++) {
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ape[i].peRed = lprgb[i].rgbRed;
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ape[i].peGreen = lprgb[i].rgbGreen;
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ape[i].peBlue = lprgb[i].rgbBlue;
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ape[i].peFlags = 0;
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}
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DrawDibChangePalette(hdd, 0, (int)lpbi->biClrUsed, (LPPALETTEENTRY)ape);
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return DISPLAYDIB_NOERROR;
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}
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/*
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** Time to kill the window and the class
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*/
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else if (wFlags & DISPLAYDIB_END) {
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dpf4(( "DISPLAYDIB_END..." ));
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DisplayDibLeave( wFlags );
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return DISPLAYDIB_NOERROR;
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}
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/*
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** Do the drawing here !!
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*/
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else if ( !fStop ) {
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/*
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** If we were'nt asked to draw anything just return.
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*/
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if ( wFlags & DISPLAYDIB_NOIMAGE ) {
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return DISPLAYDIB_NOERROR;
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}
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xExt = lpbi->biWidth;
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yExt = lpbi->biHeight;
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if ( wFlags & DISPLAYDIB_ZOOM2 ) {
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xExt <<= 1;
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yExt <<= 1;
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}
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else if ( iMovieSizeMultiplier ) {
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xExt <<= iMovieSizeMultiplier;
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yExt <<= iMovieSizeMultiplier;
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}
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wNumColors = lpbi->biClrUsed;
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if (wNumColors == 0 && lpbi->biBitCount <= 8) {
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wNumColors = 1 << (UINT)lpbi->biBitCount;
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}
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/*
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** setup pointers
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*/
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if (lpBits == NULL) {
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lpBits = (LPBYTE)lpbi + lpbi->biSize + wNumColors * sizeof(RGBQUAD);
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}
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/*
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** center the image
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*/
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if (!(wFlags & DISPLAYDIB_NOCENTER)) {
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xScreen = ((int)dxScreen - xExt) / 2;
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yScreen = ((int)dyScreen - yExt) / 2;
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}
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else {
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xScreen = 0;
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yScreen = 0;
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}
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dpf5(( "Drawing to the screen..." ));
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DrawDibDraw( hdd, hdcFullScreen,
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xScreen, yScreen, xExt, yExt,
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lpbi, lpBits,
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0, 0, lpbi->biWidth, lpbi->biHeight,
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DDF_SAME_HDC | DDF_SAME_DRAW );
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return DISPLAYDIB_NOERROR;
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}
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/*
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** The user pressed a key... time to stop
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*/
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else {
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dpf4(( "The keyboard hook is telling us to stop..." ));
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DisplayDibLeave( wFlags );
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return DISPLAYDIB_NOTSUPPORTED;
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}
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}
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/*****************************Private*Routine******************************\
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* DisplayDibEnter
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*
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*
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*
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* History:
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* 23-03-94 - StephenE - Created
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*
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\**************************************************************************/
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UINT
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DisplayDibEnter(
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LPBITMAPINFOHEADER lpbi,
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UINT wFlags
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)
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{
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WNDCLASS wc;
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HINSTANCE hInst = GetModuleHandle( NULL );
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/*
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** If our class isn't already registered with windows register it
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*/
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fClassRegistered = GetClassInfo( hInst, TEXT("SJE_FULLSCREEN"), &wc );
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if ( fClassRegistered == FALSE ) {
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ZeroMemory( &wc, sizeof(wc) );
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wc.style = CS_OWNDC;
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wc.lpfnWndProc = FullScreenWndProc;
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wc.hInstance = hInst;
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wc.hbrBackground = (HBRUSH)GetStockObject( BLACK_BRUSH );
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wc.lpszClassName = TEXT("SJE_FULLSCREEN");
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fClassRegistered = RegisterClass( &wc );
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dpf4(( "Class registered... %s", fClassRegistered ? "OK" : "FAILED" ));
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}
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if ( fClassRegistered ) {
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/*
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** Do we already have a window ??
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*/
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if ( hwndFullScreen == NULL ) {
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hwndFullScreen = CreateWindowEx(WS_EX_TOPMOST,
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TEXT("SJE_FULLSCREEN"),
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NULL,
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WS_POPUP,
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0, 0, 0, 0,
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NULL, NULL,
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hInst, NULL );
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dpf4(( "Window created... %s", hwndFullScreen ? "OK" : "FAILED" ));
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}
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if ( hwndFullScreen ) {
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LONG yExt;
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LONG xExt;
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MSG msg;
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/*
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** purge the queue of keyboard messages before installing
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** the hook.
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*/
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while ( PeekMessage( &msg, NULL, WM_KEYFIRST, WM_KEYLAST,
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PM_REMOVE | PM_NOYIELD ) );
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hHookK = SetWindowsHookEx( WH_KEYBOARD, KeyboardHookProc,
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GetModuleHandle(TEXT("DISPDB32.DLL")),
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0 );
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dpf4(( "Hook created... %s", hHookK ? "OK" : "FAILED" ));
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dxScreen = GetSystemMetrics( SM_CXSCREEN );
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dyScreen = GetSystemMetrics( SM_CYSCREEN );
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hdcFullScreen = GetDC( hwndFullScreen );
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hdd = DrawDibOpen();
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xExt = lpbi->biWidth;
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yExt = lpbi->biHeight;
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iMovieSizeMultiplier =
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DisplayCalcMovieMultiplier( xExt, yExt, lpbi->biCompression );
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if ( wFlags & DISPLAYDIB_ZOOM2 ) {
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xExt <<= 1;
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yExt <<= 1;
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}
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else if ( iMovieSizeMultiplier ) {
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xExt <<= iMovieSizeMultiplier;
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yExt <<= iMovieSizeMultiplier;
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}
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dpf1(( "Drawing at %d by %d... Flags = 0x%X", xExt, yExt, wFlags ));
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DrawDibBegin( hdd, hdcFullScreen, xExt, yExt,
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lpbi, lpbi->biWidth, lpbi->biHeight, 0 );
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MoveWindow( hwndFullScreen, 0, 0, dxScreen, dyScreen, FALSE );
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ShowWindow( hwndFullScreen, SW_SHOW );
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UpdateWindow( hwndFullScreen );
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ShowCursor( FALSE );
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SetFocus( hwndFullScreen );
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}
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}
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fStop = FALSE;
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return hwndFullScreen != NULL ? DISPLAYDIB_NOERROR : DISPLAYDIB_NOTSUPPORTED;
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}
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/*****************************Private*Routine******************************\
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* DisplayDibLeave
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*
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*
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*
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* History:
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* 23-03-94 - StephenE - Created
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*
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\**************************************************************************/
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void
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DisplayDibLeave(
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UINT wFlags
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)
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{
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if (hwndFullScreen) {
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DestroyWindow( hwndFullScreen );
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hwndFullScreen = NULL;
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}
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}
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/*****************************Private*Routine******************************\
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* DisplayCalcMovieMultiplier
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*
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* Determines the largest movie that the display is capable of displaying.
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*
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* History:
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* dd-mm-94 - StephenE - Created
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*
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\**************************************************************************/
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int
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DisplayCalcMovieMultiplier(
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int cxOriginal,
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int cyOriginal,
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DWORD dwCompression
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)
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{
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SYSTEM_INFO SysInfo;
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int iMult;
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int iMultTemp;
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int cxOriginalSave, cyOriginalSave;
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|
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/*
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** For now, don't try to stretch 'cvid' compressed movies. This is
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** because it looks bad!!
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*/
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if ( *((LPSTR)&dwCompression + 0) == 'c'
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&& *((LPSTR)&dwCompression + 1) == 'v'
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&& *((LPSTR)&dwCompression + 2) == 'i'
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&& *((LPSTR)&dwCompression + 3) == 'd' ) {
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return 0;
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}
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GetSystemInfo( &SysInfo );
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iMultTemp = iMult = 0;
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cxOriginalSave = cxOriginal;
|
|
cyOriginalSave = cyOriginal;
|
|
|
|
switch ( SysInfo.wProcessorArchitecture ) {
|
|
|
|
case PROCESSOR_ARCHITECTURE_INTEL:
|
|
if ( SysInfo.wProcessorLevel <= 3 ) {
|
|
break;
|
|
}
|
|
|
|
/*
|
|
** maybe later we will do something different for i486's
|
|
** for now they just fall through to the RISC / Pentium default
|
|
** case below.
|
|
*/
|
|
|
|
default:
|
|
|
|
while ( (cxOriginal <= CX_MAX_MOVIE_DEFAULT)
|
|
&& (cyOriginal <= CY_MAX_MOVIE_DEFAULT) ) {
|
|
|
|
iMult = iMultTemp;
|
|
iMultTemp++;
|
|
|
|
cxOriginal = cxOriginalSave << iMultTemp;
|
|
cyOriginal = cyOriginalSave << iMultTemp;
|
|
}
|
|
break;
|
|
}
|
|
|
|
return iMult;
|
|
}
|
|
|
|
|
|
/******************************Public*Routine******************************\
|
|
* FullScreenWndProc
|
|
*
|
|
*
|
|
*
|
|
* History:
|
|
* 23-03-94 - StephenE - Created
|
|
*
|
|
\**************************************************************************/
|
|
LRESULT CALLBACK
|
|
FullScreenWndProc(
|
|
HWND hwnd,
|
|
UINT message,
|
|
WPARAM wParam,
|
|
LPARAM lParam
|
|
)
|
|
{
|
|
switch ( message ) {
|
|
|
|
case WM_PAINT:
|
|
{
|
|
PAINTSTRUCT ps;
|
|
RECT rc;
|
|
|
|
dpf4(( "Window needs painting" ));
|
|
BeginPaint( hwnd, &ps );
|
|
GetUpdateRect( hwnd, &rc, FALSE );
|
|
FillRect( hdcFullScreen, &rc, GetStockObject( BLACK_BRUSH ) );
|
|
EndPaint( hwnd, &ps );
|
|
}
|
|
break;
|
|
|
|
case WM_PALETTECHANGED:
|
|
if ( (HWND)wParam == hwnd ) {
|
|
break;
|
|
}
|
|
|
|
/* fall thru */
|
|
|
|
case WM_QUERYNEWPALETTE:
|
|
if ( DrawDibRealize( hdd, hdcFullScreen, FALSE ) > 0 ) {
|
|
InvalidateRect( hwnd, NULL, TRUE );
|
|
}
|
|
break;
|
|
|
|
case WM_DESTROY:
|
|
dpf4(( "Window destroyed releasing DC" ));
|
|
ReleaseDC( hwnd, hdcFullScreen );
|
|
DrawDibEnd( hdd );
|
|
DrawDibClose( hdd );
|
|
|
|
UnregisterClass( TEXT("SJE_FULLSCREEN"), GetModuleHandle( NULL ) );
|
|
|
|
fClassRegistered = FALSE;
|
|
fStop = FALSE;
|
|
|
|
ShowCursor( TRUE );
|
|
UnhookWindowsHookEx( hHookK );
|
|
break;
|
|
|
|
default:
|
|
return DefWindowProc( hwnd, message, wParam, lParam );
|
|
}
|
|
|
|
return (LRESULT)FALSE;
|
|
}
|
|
|
|
|
|
|
|
/******************************Public*Routine******************************\
|
|
* KeyboardHookProc
|
|
*
|
|
*
|
|
*
|
|
* History:
|
|
* 23-03-94 - StephenE - Created
|
|
*
|
|
\**************************************************************************/
|
|
LRESULT CALLBACK
|
|
KeyboardHookProc(
|
|
int nCode,
|
|
WPARAM wParam,
|
|
LPARAM lParam
|
|
)
|
|
{
|
|
if ( nCode == HC_ACTION) {
|
|
|
|
/*
|
|
** Only interested in keydowns
|
|
*/
|
|
if ( !(lParam & 0x80000000) ) {
|
|
dpf4(( "Stop requested from the keyboard hook" ));
|
|
fStop = TRUE;
|
|
}
|
|
}
|
|
|
|
return CallNextHookEx( hHookK, nCode, wParam, lParam );
|
|
}
|
|
|
|
|
|
#if DBG
|
|
/*****************************Private*Routine******************************\
|
|
* dprintf
|
|
*
|
|
* Standard debug out stuff
|
|
*
|
|
* History:
|
|
* 23-03-94 - StephenE - Created
|
|
*
|
|
\**************************************************************************/
|
|
void
|
|
dprintf(
|
|
LPSTR lpszFormat,
|
|
...
|
|
)
|
|
{
|
|
char buf[512];
|
|
UINT n;
|
|
va_list va;
|
|
|
|
n = wsprintfA(buf, "DISPDB32: (tid %x) ", GetCurrentThreadId());
|
|
|
|
va_start(va, lpszFormat);
|
|
n += wvsprintfA(buf+n, lpszFormat, va);
|
|
va_end(va);
|
|
|
|
buf[n++] = '\n';
|
|
buf[n] = 0;
|
|
OutputDebugStringA(buf);
|
|
}
|
|
#endif
|