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Convert RGB colors to FrameBuffer format

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This commit is contained in:
Rafal Kupiec 2024-05-13 08:51:27 +02:00
parent e311cad8f7
commit 78424385fc
Signed by: belliash
GPG Key ID: 4E829243E0CFE6B4
2 changed files with 44 additions and 7 deletions
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47
xtoskrnl/hl/efifb.c
View File

@ -14,7 +14,7 @@
* Clears the screen by drawing a box filled with specified color.
*
* @param Color
* Specifies the color of the box used to fill the screen.
* Specifies the color of the box used to fill the screen in (A)RGB format.
*
* @return This routine does not return any value.
*
@ -25,18 +25,22 @@ VOID
HlClearScreen(IN ULONG Color)
{
SIZE_T Line, PositionX, PositionY;
ULONG BackgroundColor;
PULONG FrameBuf;
/* Get pointer to frame buffer */
FrameBuf = HlpFrameBufferData.Address;
/* Convert background color */
BackgroundColor = HlRGBColor(Color);
/* Fill the screen with a black box */
for(PositionY = 0; PositionY < HlpFrameBufferData.Height; PositionY++)
{
Line = PositionY * HlpFrameBufferData.PixelsPerScanLine;
for(PositionX = 0; PositionX < HlpFrameBufferData.Width; PositionX++)
{
FrameBuf[Line + PositionX] = Color;
FrameBuf[Line + PositionX] = BackgroundColor;
}
}
}
@ -51,7 +55,7 @@ HlClearScreen(IN ULONG Color)
* Supplies the Y coordinate of the pixel.
*
* @param Color
* Specifies the color of the pixel.
* Specifies the color of the pixel in (A)RGB format.
*
* @return This routine does not return any value.
*
@ -83,7 +87,7 @@ HlDrawPixel(IN ULONG PositionX,
FrameBufferIndex = 4 * HlpFrameBufferData.PixelsPerScanLine * PositionY + 4 * PositionX;
/* Set the color of the pixel by writing to the corresponding memory location */
*((PULONG)(HlpFrameBufferData.Address + FrameBufferIndex)) = Color;
*((PULONG)(HlpFrameBufferData.Address + FrameBufferIndex)) = HlRGBColor(Color);
}
/**
@ -158,7 +162,7 @@ HlInitializeFrameBuffer(VOID)
* Supplies the Y coordinate of the character.
*
* @param Color
* Supplies the font color.
* Supplies the font color in (A)RGB format.
*
* @param WideCharacter
* Supplies the wide character to be drawn on the framebuffer.
@ -178,6 +182,7 @@ HlPutCharacter(IN ULONG PositionX,
PUCHAR Character, CharacterMapping, Fragment;
UINT_PTR GlyphPixel, Pixel;
PSSFN_FONT_HEADER FbFont;
ULONG FontColor;
/* Get pointers to font data */
FbFont = (PSSFN_FONT_HEADER)HlpFrameBufferData.Font;
@ -227,8 +232,9 @@ HlPutCharacter(IN ULONG PositionX,
return;
}
/* Find the glyph position on the frame buffer */
/* Find the glyph position on the frame buffer and set font color */
GlyphPixel = (UINT_PTR)HlpFrameBufferData.Address + PositionY * HlpFrameBufferData.Pitch + PositionX * 4;
FontColor = HlRGBColor(Color);
/* Check all kerning fragments */
Mapping = 0;
@ -283,7 +289,7 @@ HlPutCharacter(IN ULONG PositionX,
if(*Fragment & CurrentFragment)
{
/* Draw glyph pixel */
*((PULONG)Pixel) = Color;
*((PULONG)Pixel) = FontColor;
}
/* Advance pixel pointer */
@ -300,3 +306,30 @@ HlPutCharacter(IN ULONG PositionX,
CharacterMapping += Character[0] & 0x40 ? 6 : 5;
}
}
/**
* Converts color format from (A)RGB one expected by current FrameBuffer.
*
* @param Color
* Specifies the color in (A)RGB format.
*
* @return Returns the color in FrameBuffer format.
*
* @since XT 1.0
*/
XTAPI
ULONG
HlRGBColor(IN ULONG Color)
{
USHORT Blue, Green, Red, Reserved;
/* Extract color components from (A)RGB value */
Blue = (USHORT)(Color & 0xFF);
Green = (USHORT)((Color >> 8) & 0xFF);
Red = (USHORT)((Color >> 16) & 0xFF);
Reserved = (USHORT)((Color >> 24) & 0xFF);
/* Return color in FrameBuffer pixel format */
return (ULONG)((Blue << HlpFrameBufferData.Pixels.BlueShift) | (Green << HlpFrameBufferData.Pixels.GreenShift) |
(Red << HlpFrameBufferData.Pixels.RedShift) | (Reserved << HlpFrameBufferData.Pixels.ReservedShift));
}

4
xtoskrnl/includes/hli.h
View File

@ -62,6 +62,10 @@ HlPutCharacter(IN ULONG PositionX,
IN ULONG Color,
IN WCHAR WideCharacter);
XTAPI
ULONG
HlRGBColor(IN ULONG Color);
XTFASTCALL
VOID
HlSetRunLevel(IN KRUNLEVEL RunLevel);