video.c File Reference

#include <freeldr.h>

Include dependency graph for video.c:

Go to the source code of this file.

Macros
#define	RGB_MAX   64
#define	RGB_MAX_PER_ITERATION   64
#define	TAG_PALETTE_COLORS   'claP'

Functions
PVOID	VideoAllocateOffScreenBuffer (VOID)
VOID	VideoFreeOffScreenBuffer (VOID)
VOID	VideoCopyOffScreenBufferToVRAM (VOID)
VOID	VideoSavePaletteState (PPALETTE_ENTRY Palette, ULONG ColorCount)
VOID	VideoRestorePaletteState (PPALETTE_ENTRY Palette, ULONG ColorCount)
VOID	VideoSetAllColorsToBlack (ULONG ColorCount)
VOID	VideoFadeIn (PPALETTE_ENTRY Palette, ULONG ColorCount)
VOID	VideoFadeOut (ULONG ColorCount)

Variables
static PVOID	VideoOffScreenBuffer = NULL

Macro Definition Documentation

RGB_MAX

#define RGB_MAX   64

Definition at line 10 of file video.c.

RGB_MAX_PER_ITERATION

#define RGB_MAX_PER_ITERATION   64

Definition at line 11 of file video.c.

TAG_PALETTE_COLORS

#define TAG_PALETTE_COLORS   'claP'

Definition at line 12 of file video.c.

Function Documentation

VideoAllocateOffScreenBuffer()

PVOID VideoAllocateOffScreenBuffer

(

VOID

)

Definition at line 16 of file video.c.

{
    ULONG BufferSize;
 
    VideoFreeOffScreenBuffer();
 
    BufferSize = MachVideoGetBufferSize();
 
    VideoOffScreenBuffer = MmAllocateMemoryWithType(BufferSize, LoaderFirmwareTemporary);
 
    return VideoOffScreenBuffer;
}

Referenced by TuiInitialize().

VideoCopyOffScreenBufferToVRAM()

VOID VideoCopyOffScreenBufferToVRAM

(

VOID

)

Definition at line 38 of file video.c.

{
    MachVideoCopyOffScreenBufferToVRAM(VideoOffScreenBuffer);
}

Referenced by MiniTuiDrawBackdrop(), MiniTuiDrawMenu(), MiniTuiTickProgressBar(), TuiDisplayMenu(), TuiDrawBackdrop(), TuiDrawMenu(), TuiDrawStatusText(), TuiEditBox(), TuiMessageBoxCritical(), TuiProcessMenuKeyboardEvent(), TuiRestoreScreen(), and TuiTickProgressBar().

VideoFadeIn()

VOID VideoFadeIn	(	PPALETTE_ENTRY	Palette,
		ULONG	ColorCount
	)

Definition at line 79 of file video.c.

{
    ULONG Index;
    UCHAR Color;
    PPALETTE_ENTRY PaletteColors;
 
    PaletteColors = FrLdrTempAlloc(sizeof(PALETTE_ENTRY) * ColorCount, TAG_PALETTE_COLORS);
    if (!PaletteColors) return;
 
    for (Index = 0; Index < RGB_MAX; Index++)
    {
        for (Color = 0; Color < ColorCount; Color++)
        {
            MachVideoGetPaletteColor(Color, &PaletteColors[Color].Red, &PaletteColors[Color].Green, &PaletteColors[Color].Blue);
 
            // Increment each color so it approaches its real value
            if (PaletteColors[Color].Red < Palette[Color].Red)
            {
                PaletteColors[Color].Red++;
            }
            if (PaletteColors[Color].Green < Palette[Color].Green)
            {
                PaletteColors[Color].Green++;
            }
            if (PaletteColors[Color].Blue < Palette[Color].Blue)
            {
                PaletteColors[Color].Blue++;
            }
 
            // Make sure we haven't exceeded the real value
            if (PaletteColors[Color].Red > Palette[Color].Red)
            {
                PaletteColors[Color].Red = Palette[Color].Red;
            }
            if (PaletteColors[Color].Green > Palette[Color].Green)
            {
                PaletteColors[Color].Green = Palette[Color].Green;
            }
            if (PaletteColors[Color].Blue > Palette[Color].Blue)
            {
                PaletteColors[Color].Blue = Palette[Color].Blue;
            }
        }
 
        // Set the colors
        for (Color = 0; Color < ColorCount; Color++)
        {
            if ((Color % RGB_MAX_PER_ITERATION) == 0)
            {
                MachVideoSync();
            }
 
            MachVideoSetPaletteColor(Color, PaletteColors[Color].Red, PaletteColors[Color].Green, PaletteColors[Color].Blue);
        }
    }
 
    FrLdrTempFree(PaletteColors, TAG_PALETTE_COLORS);
}

Referenced by TuiFadeInBackdrop().

VideoFadeOut()

VOID VideoFadeOut

(

ULONG

ColorCount

)

Definition at line 138 of file video.c.

{
    ULONG Index;
    UCHAR Color;
    UCHAR Red;
    UCHAR Green;
    UCHAR Blue;
 
    for (Index = 0; Index < RGB_MAX; Index++)
    {
        for (Color = 0; Color < ColorCount; Color++)
        {
            if ((Color % RGB_MAX_PER_ITERATION) == 0)
            {
                MachVideoSync();
            }
 
            MachVideoGetPaletteColor(Color, &Red, &Green, &Blue);
 
            if (Red > 0)
            {
                Red--;
            }
            if (Green > 0)
            {
                Green--;
            }
            if (Blue > 0)
            {
                Blue--;
            }
 
            MachVideoSetPaletteColor(Color, Red, Green, Blue);
        }
    }
}

Referenced by TuiFadeOut().

VideoFreeOffScreenBuffer()

VOID VideoFreeOffScreenBuffer

(

VOID

)

Definition at line 29 of file video.c.

{
    if (!VideoOffScreenBuffer)
        return;
 
    MmFreeMemory(VideoOffScreenBuffer);
    VideoOffScreenBuffer = NULL;
}

Referenced by TuiUnInitialize(), and VideoAllocateOffScreenBuffer().

VideoRestorePaletteState()

VOID VideoRestorePaletteState	(	PPALETTE_ENTRY	Palette,
		ULONG	ColorCount
	)

Definition at line 54 of file video.c.

{
    ULONG Color;
 
    MachVideoSync();
 
    for (Color = 0; Color < ColorCount; Color++)
    {
        MachVideoSetPaletteColor((UCHAR)Color, Palette[Color].Red, Palette[Color].Green, Palette[Color].Blue);
    }
}

Referenced by TuiFadeOut().

VideoSavePaletteState()

VOID VideoSavePaletteState	(	PPALETTE_ENTRY	Palette,
		ULONG	ColorCount
	)

Definition at line 44 of file video.c.

{
    ULONG Color;
 
    for (Color = 0; Color < ColorCount; Color++)
    {
        MachVideoGetPaletteColor((UCHAR)Color, &Palette[Color].Red, &Palette[Color].Green, &Palette[Color].Blue);
    }
}

Referenced by TuiFadeInBackdrop(), and TuiFadeOut().

VideoSetAllColorsToBlack()

VOID VideoSetAllColorsToBlack

(

ULONG

ColorCount

)

Definition at line 67 of file video.c.

{
    UCHAR Color;
 
    MachVideoSync();
 
    for (Color = 0; Color < ColorCount; Color++)
    {
        MachVideoSetPaletteColor(Color, 0, 0, 0);
    }
}

Referenced by TuiFadeInBackdrop().

Variable Documentation

VideoOffScreenBuffer

PVOID VideoOffScreenBuffer = NULL

static

Definition at line 14 of file video.c.

Referenced by VideoAllocateOffScreenBuffer(), VideoCopyOffScreenBufferToVRAM(), and VideoFreeOffScreenBuffer().