precomp.h File Reference

#include <ntifs.h>
#include <ndk/halfuncs.h>
#include <drivers/bootvid/bootvid.h>

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Classes
struct	tagBITMAPINFOHEADER
struct	_URECT

Macros
#define	BOOTCHAR_HEIGHT   13
#define	BOOTCHAR_WIDTH   8
#define	BI_RGB   0
#define	BI_RLE4   2
#define	RGB(r, g, b)   ((RGBQUAD)(((UCHAR)(b) | ((USHORT)((UCHAR)(g))<<8)) | (((ULONG)(UCHAR)(r))<<16)))
#define	GetRValue(quad)   ((UCHAR)(((quad)>>16) & 0xFF))
#define	GetGValue(quad)   ((UCHAR)(((quad)>>8) & 0xFF))
#define	GetBValue(quad)   ((UCHAR)((quad) & 0xFF))
#define	InitializePalette()   InitPaletteWithTable((PULONG)VidpDefaultPalette, BV_MAX_COLORS)
#define	GetFontPtr(_Char)   (&VidpFontData[(_Char) * BOOTCHAR_HEIGHT])
#define	FONT_PTR_DELTA   (1)

Typedefs
typedef struct tagBITMAPINFOHEADER	BITMAPINFOHEADER
typedef struct tagBITMAPINFOHEADER *	PBITMAPINFOHEADER
typedef ULONG	RGBQUAD
typedef struct _URECT	URECT

Functions
VOID	PreserveRow (_In_ ULONG CurrentTop, _In_ ULONG TopDelta, _In_ BOOLEAN Restore)
VOID	DoScroll (_In_ ULONG Scroll)
VOID	DisplayCharacter (_In_ CHAR Character, _In_ ULONG Left, _In_ ULONG Top, _In_ ULONG TextColor, _In_ ULONG BackColor)
VOID	ResetDisplay (_In_ BOOLEAN SetMode)

Variables
UCHAR	VidpTextColor
ULONG	VidpCurrentX
ULONG	VidpCurrentY
URECT	VidpScrollRegion
const UCHAR	VidpFontData [256 *BOOTCHAR_HEIGHT]
const RGBQUAD	VidpDefaultPalette [BV_MAX_COLORS]

Macro Definition Documentation

BI_RGB

#define BI_RGB   0

Examples

/srv/doxygen/reactos/win32ss/gdi/gdi32/objects/utils.c.

Definition at line 55 of file precomp.h.

BI_RLE4

#define BI_RLE4   2

Examples

/srv/doxygen/reactos/win32ss/gdi/gdi32/objects/utils.c.

Definition at line 56 of file precomp.h.

BOOTCHAR_HEIGHT

#define BOOTCHAR_HEIGHT   13

Definition at line 35 of file precomp.h.

BOOTCHAR_WIDTH

#define BOOTCHAR_WIDTH   8

Definition at line 36 of file precomp.h.

FONT_PTR_DELTA

#define FONT_PTR_DELTA   (1)

Definition at line 91 of file precomp.h.

GetBValue

#define GetBValue

(

quad

)

((UCHAR)((quad) & 0xFF))

Definition at line 82 of file precomp.h.

GetFontPtr

#define GetFontPtr

(

_Char

)

(&VidpFontData[(_Char) * BOOTCHAR_HEIGHT])

Definition at line 90 of file precomp.h.

GetGValue

#define GetGValue

(

quad

)

((UCHAR)(((quad)>>8) & 0xFF))

Definition at line 81 of file precomp.h.

GetRValue

#define GetRValue

(

quad

)

((UCHAR)(((quad)>>16) & 0xFF))

Definition at line 80 of file precomp.h.

InitializePalette

#define InitializePalette

(

)

InitPaletteWithTable((PULONG)VidpDefaultPalette, BV_MAX_COLORS)

Definition at line 84 of file precomp.h.

RGB

#define RGB	(		r,
			g,
			b
	)		((RGBQUAD)(((UCHAR)(b) | ((USHORT)((UCHAR)(g))<<8)) | (((ULONG)(UCHAR)(r))<<16)))

Definition at line 78 of file precomp.h.

Typedef Documentation

BITMAPINFOHEADER

typedef struct tagBITMAPINFOHEADER BITMAPINFOHEADER

PBITMAPINFOHEADER

typedef struct tagBITMAPINFOHEADER * PBITMAPINFOHEADER

RGBQUAD

typedef ULONG RGBQUAD

Examples

/srv/doxygen/reactos/win32ss/gdi/gdi32/objects/utils.c.

Definition at line 58 of file precomp.h.

URECT

typedef struct _URECT URECT

Function Documentation

DisplayCharacter()

VOID DisplayCharacter	(	_In_ CHAR	Character,
		_In_ ULONG	Left,
		_In_ ULONG	Top,
		_In_ ULONG	TextColor,
		_In_ ULONG	BackColor
	)

Definition at line 67 of file bootvid.c.

{
    const UCHAR* FontChar;
    ULONG i, j, XOffset;
 
    /* Get the font line for this character */
    FontChar = &VidpFontData[Character * BOOTCHAR_HEIGHT - Top];
 
    /* Loop each pixel height */
    for (i = BOOTCHAR_HEIGHT; i > 0; --i)
    {
        /* Loop each pixel width */
        XOffset = Left;
        for (j = (1 << 7); j > 0; j >>= 1)
        {
            /* Check if we should draw this pixel */
            if (FontChar[Top] & (UCHAR)j)
            {
                /* We do, use the given Text Color */
                SetPixel(XOffset, Top, (UCHAR)TextColor);
            }
            else if (BackColor < BV_COLOR_NONE)
            {
                /*
                 * This is a background pixel. We're drawing it
                 * unless it's transparent.
                 */
                SetPixel(XOffset, Top, (UCHAR)BackColor);
            }
 
            /* Increase X Offset */
            XOffset++;
        }
 
        /* Move to the next Y ordinate */
        Top++;
    }
}

Referenced by VidDisplayString(), and VidDisplayStringXY().

DoScroll()

VOID DoScroll

(

_In_ ULONG

Scroll

)

Definition at line 112 of file bootvid.c.

{
    ULONG Top, Offset;
    PUSHORT SourceOffset, DestOffset;
    PUSHORT i, j;
 
    /* Set memory positions of the scroll */
    SourceOffset = &VgaArmBase[(VidpScrollRegion.Top * (SCREEN_WIDTH / 8)) + (VidpScrollRegion.Left >> 3)];
    DestOffset = &SourceOffset[Scroll * (SCREEN_WIDTH / 8)];
 
    /* Start loop */
    for (Top = VidpScrollRegion.Top; Top <= VidpScrollRegion.Bottom; ++Top)
    {
        /* Set number of bytes to loop and start offset */
        Offset = VidpScrollRegion.Left >> 3;
        j = SourceOffset;
 
        /* Check if this is part of the scroll region */
        if (Offset <= (VidpScrollRegion.Right >> 3))
        {
            /* Update position */
            i = (PUSHORT)(DestOffset - SourceOffset);
 
            /* Loop the X axis */
            do
            {
                /* Write value in the new position so that we can do the scroll */
                WRITE_REGISTER_USHORT(j, READ_REGISTER_USHORT(j + (ULONG_PTR)i));
 
                /* Move to the next memory location to write to */
                j++;
 
                /* Move to the next byte in the region */
                Offset++;
 
                /* Make sure we don't go past the scroll region */
            } while (Offset <= (VidpScrollRegion.Right >> 3));
        }
 
        /* Move to the next line */
        SourceOffset += (SCREEN_WIDTH / 8);
        DestOffset += (SCREEN_WIDTH / 8);
    }
}

Referenced by VidDisplayString().

PreserveRow()

VOID PreserveRow	(	_In_ ULONG	CurrentTop,
		_In_ ULONG	TopDelta,
		_In_ BOOLEAN	Restore
	)

Definition at line 159 of file bootvid.c.

{
    PUSHORT Position1, Position2;
    ULONG Count;
 
    /* Calculate the position in memory for the row */
    if (Restore)
    {
        /* Restore the row by copying back the contents saved off-screen */
        Position1 = &VgaArmBase[CurrentTop * (SCREEN_WIDTH / 8)];
        Position2 = &VgaArmBase[SCREEN_HEIGHT * (SCREEN_WIDTH / 8)];
    }
    else
    {
        /* Preserve the row by saving its contents off-screen */
        Position1 = &VgaArmBase[SCREEN_HEIGHT * (SCREEN_WIDTH / 8)];
        Position2 = &VgaArmBase[CurrentTop * (SCREEN_WIDTH / 8)];
    }
 
    /* Set the count and loop every pixel */
    Count = TopDelta * (SCREEN_WIDTH / 8);
    while (Count--)
    {
        /* Write the data back on the other position */
        WRITE_REGISTER_USHORT(Position1, READ_REGISTER_USHORT(Position2));
 
        /* Increase both positions */
        Position1++;
        Position2++;
    }
}

Referenced by VidDisplayString().

ResetDisplay()

VOID ResetDisplay

(

_In_ BOOLEAN

SetMode

)

Definition at line 263 of file bootvid.c.

{
    /* Re-initialize the display */
    VidpInitializeDisplay();
 
    /* Re-initialize the palette and fill the screen black */
    InitializePalette();
    VidSolidColorFill(0, 0, SCREEN_WIDTH - 1, SCREEN_HEIGHT - 1, BV_COLOR_BLACK);
}

Referenced by VidResetDisplay().

Variable Documentation

VidpCurrentX

ULONG VidpCurrentX

extern

Definition at line 15 of file console.c.

Referenced by VidDisplayString(), VidInitialize(), VidResetDisplay(), and VidSetScrollRegion().

VidpCurrentY

ULONG VidpCurrentY

extern

Definition at line 16 of file console.c.

Referenced by VidDisplayString(), VidInitialize(), VidResetDisplay(), and VidSetScrollRegion().

VidpDefaultPalette

const RGBQUAD VidpDefaultPalette[BV_MAX_COLORS]

extern

Definition at line 19 of file common.c.

Referenced by InitPaletteWithTable(), and VidpBuildColor().

VidpFontData

const UCHAR VidpFontData[256 *BOOTCHAR_HEIGHT]

extern

Definition at line 16 of file fontdata.c.

Referenced by DisplayCharacter().

VidpScrollRegion

URECT VidpScrollRegion

extern

Definition at line 17 of file console.c.

Referenced by DoScroll(), VidDisplayString(), and VidSetScrollRegion().

VidpTextColor

UCHAR VidpTextColor

extern

Definition at line 14 of file console.c.

Referenced by VidDisplayString(), and VidSetTextColor().