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Optimize HlClearScreen() routine

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This commit is contained in:
Rafal Kupiec 2024-03-09 15:50:05 +01:00
parent a4c22ab5e8
commit a4d9e6dd8e
Signed by: belliash
GPG Key ID: 4E829243E0CFE6B4
1 changed files with 10 additions and 5 deletions
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15
xtoskrnl/hl/efifb.c
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@ -20,14 +20,19 @@ XTAPI
VOID VOID
HlClearScreen(VOID) HlClearScreen(VOID)
{ {
SIZE_T PositionX, PositionY; SIZE_T Line, PositionX, PositionY;
PULONG FrameBuf;
/* Get pointer to frame buffer */
FrameBuf = HlpFrameBufferData.Address;
/* Fill the screen with a black box */ /* Fill the screen with a black box */
for(PositionX = 0; PositionX < HlpFrameBufferData.Width; PositionX++)
{
for(PositionY = 0; PositionY < HlpFrameBufferData.Height; PositionY++) for(PositionY = 0; PositionY < HlpFrameBufferData.Height; PositionY++)
{ {
HlDrawPixel(PositionX, PositionY, 0x00000000); Line = PositionY * HlpFrameBufferData.PixelsPerScanLine;
for(PositionX = 0; PositionX < HlpFrameBufferData.Width; PositionX++)
{
FrameBuf[Line + PositionX] = 0x00000000;
} }
} }
} }
@ -74,7 +79,7 @@ HlDrawPixel(IN ULONG PositionX,
FrameBufferIndex = 4 * HlpFrameBufferData.PixelsPerScanLine * PositionY + 4 * PositionX; FrameBufferIndex = 4 * HlpFrameBufferData.PixelsPerScanLine * PositionY + 4 * PositionX;
/* Set the color of the pixel by writing to the corresponding memory location */ /* Set the color of the pixel by writing to the corresponding memory location */
*((PUINT)(HlpFrameBufferData.Address + FrameBufferIndex)) = Color; *((PULONG)(HlpFrameBufferData.Address + FrameBufferIndex)) = Color;
} }
/** /**