284 lines
3.8 KiB
C
284 lines
3.8 KiB
C
/*++
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Copyright (c) 1992 Microsoft Corporation
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Module Name:
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dndisp.c
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Abstract:
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DOS-based NT setup program video display routines.
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Author:
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Ted Miller (tedm) 30-March-1992
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Revision History:
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--*/
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#include "enduser.h"
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#define SCREEN_TOP_SCANLINE 80
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#define SCREEN_WIDTH 80
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#define SCREEN_HEIGHT 25
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BYTE CurrentPixelValue;
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BYTE LeftMargin;
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BYTE ScreenX;
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BYTE ScreenY;
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BYTE CharWidth;
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BYTE CharHeight;
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FPCHAR BannerBitmap;
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VOID
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DispInitialize(
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VOID
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)
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/*++
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Routine Description:
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Put the display in a known state and initialize
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the display package.
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Arguments:
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None.
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Return Value:
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None.
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--*/
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{
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VgaInit(); // this clears the screen
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FontGetInfo(&CharWidth,&CharHeight);
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DispClearClientArea(NULL);
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DispSetLeftMargin(TEXT_LEFT_MARGIN);
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DispPositionCursor(TEXT_LEFT_MARGIN,TEXT_TOP_LINE);
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CurrentPixelValue = DEFAULT_TEXT_PIXEL_VALUE;
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}
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VOID
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DispReinitialize(
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VOID
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)
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{
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FontGetInfo(&CharWidth,&CharHeight);
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}
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VOID
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DispSetCurrentPixelValue(
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IN BYTE PixelValue
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)
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{
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CurrentPixelValue = PixelValue;
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}
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FPVOID
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DispSaveDescriptionArea(
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OUT USHORT *SaveTop,
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OUT USHORT *SaveHeight,
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OUT USHORT *SaveBytesPerRow,
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OUT USHORT *DescriptionTop
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)
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{
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*DescriptionTop = (CharHeight > 12) ? 16 : 25;
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*SaveHeight = CharHeight * 5;
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*SaveTop = (*DescriptionTop * CharHeight) + SCREEN_TOP_SCANLINE;
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return(VgaSaveBlock(0,*SaveTop,640,*SaveHeight,SaveBytesPerRow));
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}
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VOID
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DispSetLeftMargin(
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IN BYTE X
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)
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{
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LeftMargin = X;
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}
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VOID
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DispClearClientArea(
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IN FPCHAR NewBannerBitmap OPTIONAL
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)
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/*++
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Routine Description:
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Clear the client area of the screen, ie, the area between the header
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and status line. We do this by restoring the background and banner
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bitmaps.
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Arguments:
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None.
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Return Value:
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None.
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--*/
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{
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if(NewBannerBitmap) {
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BannerBitmap = strdup(NewBannerBitmap);
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}
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VgaDisplayBitmapFromFile("backgrnd.bmp",0,0,IoBuffer,63*512);
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redisplay:
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if(!VgaDisplayBitmapFromFile(BannerBitmap ? BannerBitmap : "enduser.bmp",0,0,IoBuffer,63*512)) {
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//
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// File might not exist
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//
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if(BannerBitmap) {
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free(BannerBitmap);
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BannerBitmap = NULL;
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goto redisplay;
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}
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}
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}
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VOID
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DispPositionCursor(
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IN BYTE X,
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IN BYTE Y
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)
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/*++
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Routine Description:
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Position the cursor.
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Arguments:
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X,Y - cursor coords
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Return Value:
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None.
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--*/
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{
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if(X >= SCREEN_WIDTH) {
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X = 0;
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Y++;
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}
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if(Y >= SCREEN_HEIGHT) {
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Y = 0;
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}
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ScreenX = X;
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ScreenY = Y;
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}
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VOID
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DispGetCursorPosition(
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OUT FPBYTE X,
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OUT FPBYTE Y
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)
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{
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*X = ScreenX;
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*Y = ScreenY;
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}
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VOID
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DispWriteChar(
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IN CHAR chr
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)
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/*++
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Routine Description:
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Write a character in the current attribute at the current position.
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Arguments:
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chr - Character to write
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Return Value:
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None.
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--*/
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{
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if(chr == '\n') {
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ScreenX = LeftMargin;
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ScreenY++;
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return;
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}
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//
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// Output the character
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//
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FontWriteChar(
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chr,
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ScreenX * CharWidth,
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SCREEN_TOP_SCANLINE + (ScreenY * CharHeight),
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CurrentPixelValue,
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16 // no background value, text is transparent
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);
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}
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VOID
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DispWriteString(
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IN FPCHAR String
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)
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/*++
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Routine Description:
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Write a string on the client area in the current position and
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adjust the current position. The string is written in the current
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attribute.
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Arguments:
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String - null terminated string to write.
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Return Value:
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None.
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--*/
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{
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FPCHAR p;
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for(p=String; *p; p++) {
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DispWriteChar(*p);
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if(*p != '\n') {
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ScreenX++;
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}
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}
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}
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