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75 lines
1.7 KiB
C
75 lines
1.7 KiB
C
/*
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* PROJECT: ReactOS Boot Video Driver for VGA-compatible cards
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* LICENSE: GPL-2.0-or-later (https://spdx.org/licenses/GPL-2.0-or-later)
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* PURPOSE: VGA definitions
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* COPYRIGHT: Copyright 2007 Alex Ionescu <alex.ionescu@reactos.org>
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*/
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#pragma once
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extern ULONG_PTR VgaRegisterBase;
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extern ULONG_PTR VgaBase;
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extern USHORT AT_Initialization[];
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extern USHORT VGA_640x480[];
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extern UCHAR PixelMask[8];
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#define __inpb(Port) \
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READ_PORT_UCHAR((PUCHAR)(VgaRegisterBase + (Port)))
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#define __inpw(Port) \
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READ_PORT_USHORT((PUSHORT)(VgaRegisterBase + (Port)))
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#define __outpb(Port, Value) \
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WRITE_PORT_UCHAR((PUCHAR)(VgaRegisterBase + (Port)), (UCHAR)(Value))
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#define __outpw(Port, Value) \
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WRITE_PORT_USHORT((PUSHORT)(VgaRegisterBase + (Port)), (USHORT)(Value))
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VOID
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InitPaletteWithTable(
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_In_ PULONG Table,
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_In_ ULONG Count);
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VOID
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PrepareForSetPixel(VOID);
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FORCEINLINE
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VOID
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SetPixel(
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_In_ ULONG Left,
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_In_ ULONG Top,
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_In_ UCHAR Color)
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{
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PUCHAR PixelPosition;
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/* Calculate the pixel position */
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PixelPosition = (PUCHAR)(VgaBase + (Left >> 3) + (Top * (SCREEN_WIDTH / 8)));
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/* Select the bitmask register and write the mask */
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__outpw(VGA_BASE_IO_PORT + GRAPH_ADDRESS_PORT, (PixelMask[Left & 7] << 8) | IND_BIT_MASK);
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/* Dummy read to load latch registers */
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(VOID)READ_REGISTER_UCHAR(PixelPosition);
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/* Set the new color */
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WRITE_REGISTER_UCHAR(PixelPosition, Color);
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}
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VOID
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PreserveRow(
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_In_ ULONG CurrentTop,
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_In_ ULONG TopDelta,
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_In_ BOOLEAN Restore);
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VOID
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DoScroll(
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_In_ ULONG Scroll);
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VOID
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DisplayCharacter(
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_In_ CHAR Character,
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_In_ ULONG Left,
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_In_ ULONG Top,
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_In_ ULONG TextColor,
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_In_ ULONG BackColor);
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