mirror of
https://github.com/reactos/reactos.git
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114 lines
3.1 KiB
C
114 lines
3.1 KiB
C
/*
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* PROJECT: ReactOS Console Text-Mode Device Driver
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* LICENSE: GPL-2.0+ (https://spdx.org/licenses/GPL-2.0+)
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* PURPOSE: Loading specific fonts into VGA.
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* COPYRIGHT: Copyright 2008-2019 Aleksey Bragin (aleksey@reactos.org)
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* Copyright 2008-2019 Colin Finck (mail@colinfinck.de)
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* Copyright 2008-2019 Christoph von Wittich (christoph_vw@reactos.org)
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*/
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/* INCLUDES ***************************************************************/
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#include "blue.h"
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//
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// FIXME: For the moment we support only a fixed 256-char 8-bit font.
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//
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VOID OpenBitPlane(VOID);
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VOID CloseBitPlane(VOID);
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VOID LoadFont(_In_ PUCHAR Bitplane, _In_ PUCHAR FontBitfield);
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/* FUNCTIONS ****************************************************************/
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VOID
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ScrSetFont(
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_In_ PUCHAR FontBitfield)
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{
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PHYSICAL_ADDRESS BaseAddress;
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PUCHAR Bitplane;
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/* open bit plane for font table access */
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OpenBitPlane();
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/* get pointer to video memory */
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BaseAddress.QuadPart = BITPLANE_BASE;
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Bitplane = (PUCHAR)MmMapIoSpace(BaseAddress, 0xFFFF, MmNonCached);
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LoadFont(Bitplane, FontBitfield);
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MmUnmapIoSpace(Bitplane, 0xFFFF);
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/* close bit plane */
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CloseBitPlane();
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}
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/* PRIVATE FUNCTIONS *********************************************************/
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/* Font-load specific funcs */
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VOID
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OpenBitPlane(VOID)
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{
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/* disable interrupts */
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_disable();
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/* sequence reg */
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WRITE_PORT_UCHAR(SEQ_COMMAND, SEQ_RESET); WRITE_PORT_UCHAR(SEQ_DATA, 0x01);
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WRITE_PORT_UCHAR(SEQ_COMMAND, SEQ_ENABLE_WRT_PLANE); WRITE_PORT_UCHAR(SEQ_DATA, 0x04);
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WRITE_PORT_UCHAR(SEQ_COMMAND, SEQ_MEM_MODE); WRITE_PORT_UCHAR(SEQ_DATA, 0x07);
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WRITE_PORT_UCHAR(SEQ_COMMAND, SEQ_RESET); WRITE_PORT_UCHAR(SEQ_DATA, 0x03);
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/* graphic reg */
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WRITE_PORT_UCHAR(GCT_COMMAND, GCT_READ_PLANE); WRITE_PORT_UCHAR(GCT_DATA, 0x02);
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WRITE_PORT_UCHAR(GCT_COMMAND, GCT_RW_MODES); WRITE_PORT_UCHAR(GCT_DATA, 0x00);
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WRITE_PORT_UCHAR(GCT_COMMAND, GCT_GRAPH_MODE); WRITE_PORT_UCHAR(GCT_DATA, 0x00);
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/* enable interrupts */
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_enable();
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}
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VOID
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CloseBitPlane(VOID)
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{
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/* disable interrupts */
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_disable();
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/* sequence reg */
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WRITE_PORT_UCHAR(SEQ_COMMAND, SEQ_RESET); WRITE_PORT_UCHAR(SEQ_DATA, 0x01);
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WRITE_PORT_UCHAR(SEQ_COMMAND, SEQ_ENABLE_WRT_PLANE); WRITE_PORT_UCHAR(SEQ_DATA, 0x03);
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WRITE_PORT_UCHAR(SEQ_COMMAND, SEQ_MEM_MODE); WRITE_PORT_UCHAR(SEQ_DATA, 0x03);
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WRITE_PORT_UCHAR(SEQ_COMMAND, SEQ_RESET); WRITE_PORT_UCHAR(SEQ_DATA, 0x03);
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/* graphic reg */
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WRITE_PORT_UCHAR(GCT_COMMAND, GCT_READ_PLANE); WRITE_PORT_UCHAR(GCT_DATA, 0x00);
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WRITE_PORT_UCHAR(GCT_COMMAND, GCT_RW_MODES); WRITE_PORT_UCHAR(GCT_DATA, 0x10);
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WRITE_PORT_UCHAR(GCT_COMMAND, GCT_GRAPH_MODE); WRITE_PORT_UCHAR(GCT_DATA, 0x0e);
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/* enable interrupts */
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_enable();
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}
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VOID
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LoadFont(
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_In_ PUCHAR Bitplane,
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_In_ PUCHAR FontBitfield)
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{
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UINT32 i, j;
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for (i = 0; i < 256; i++)
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{
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for (j = 0; j < 8; j++)
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{
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*Bitplane = FontBitfield[i * 8 + j];
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Bitplane++;
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}
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// padding
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for (j = 8; j < 32; j++)
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{
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*Bitplane = 0;
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Bitplane++;
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}
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}
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}
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