211 lines
6.6 KiB
C
211 lines
6.6 KiB
C
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/* $XConsortium: wm3.c /main/5 1996/02/21 17:59:21 kaleb $ */
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#ifdef HAVE_XORG_CONFIG_H
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#include <xorg-config.h>
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#endif
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#include "xf4bpp.h"
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#include "OScompiler.h"
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#include "wm3.h"
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#include "vgaVideo.h"
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#include "xf86.h"
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/* Ferraro is wrong. GJA */
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#define COPY (0 << 3)
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#define AND (1 << 3)
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#define OR (2 << 3)
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#define XOR (3 << 3)
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int
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wm3_set_regs(pGC)
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GC *pGC;
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{
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#ifndef PC98_EGC
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IOADDRESS REGBASE = xf86Screens[pGC->pScreen->myNum]->domainIOBase + 0x300;
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int post_invert = 0;
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int ALU;
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switch(pGC->alu) {
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case GXclear: /* rop0 = RROP_BLACK; rop1 = RROP_BLACK; */
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pGC->fgPixel = 0;
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pGC->bgPixel = 0;
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ALU = COPY;
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break;
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case GXand: /* rop0 = RROP_BLACK; rop1 = RROP_NOP; */
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ALU = AND;
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break;
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case GXandReverse: /* rop0 = RROP_BLACK; rop1 = RROP_INVERT; -- TRICKY */
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pGC->fgPixel = ~pGC->fgPixel;
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pGC->bgPixel = ~pGC->bgPixel;
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ALU = OR;
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post_invert = 1;
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break;
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case GXcopy: /* rop0 = RROP_BLACK; rop1 = RROP_WHITE; */
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ALU = COPY;
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break;
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case GXandInverted: /* rop0 = RROP_NOP; rop1 = RROP_BLACK; */
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pGC->fgPixel = ~pGC->fgPixel;
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pGC->bgPixel = ~pGC->bgPixel;
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ALU = AND;
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break;
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default:
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case GXnoop: /* rop0 = RROP_NOP; rop1 = RROP_NOP; */
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return 0;
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case GXxor: /* rop0 = RROP_NOP; rop1 = RROP_INVERT; */
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ALU = XOR;
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break;
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case GXor: /* rop0 = RROP_NOP; rop1 = RROP_WHITE; */
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ALU = OR;
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break;
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case GXnor: /* rop0 = RROP_INVERT; rop1 = RROP_BLACK; -- TRICKY*/
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ALU = OR;
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post_invert = 1;
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break;
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case GXequiv: /* rop0 = RROP_INVERT; rop1 = RROP_NOP; */
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pGC->fgPixel = ~pGC->fgPixel;
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pGC->bgPixel = ~pGC->bgPixel;
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ALU = XOR;
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break;
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case GXinvert: /* rop0 = RROP_INVERT; rop1 = RROP_INVERT; */
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pGC->fgPixel = 0x0F;
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pGC->bgPixel = 0x0F;
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ALU = XOR;
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break;
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case GXorReverse: /* rop0 = RROP_INVERT; rop1 = RROP_WHITE; -- TRICKY */
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pGC->fgPixel = ~pGC->fgPixel;
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pGC->bgPixel = ~pGC->bgPixel;
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ALU = AND;
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post_invert = 1;
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break;
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case GXcopyInverted: /* rop0 = RROP_WHITE; rop1 = RROP_BLACK; */
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pGC->fgPixel = ~pGC->fgPixel;
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pGC->bgPixel = ~pGC->bgPixel;
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ALU = COPY;
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break;
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case GXorInverted: /* rop0 = RROP_WHITE; rop1 = RROP_NOP; */
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pGC->fgPixel = ~pGC->fgPixel;
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pGC->bgPixel = ~pGC->bgPixel;
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ALU = OR;
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break;
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case GXnand: /* rop0 = RROP_WHITE; rop1 = RROP_INVERT; -- TRICKY */
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ALU = AND;
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post_invert = 1;
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break;
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case GXset: /* rop0 = RROP_WHITE; rop1 = RROP_WHITE; */
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pGC->fgPixel = 0x0F;
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pGC->bgPixel = 0x0F;
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ALU = COPY;
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break;
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}
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SetVideoSequencer(Mask_MapIndex, (pGC->planemask & VGA_ALLPLANES));
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SetVideoGraphics(Enb_Set_ResetIndex, VGA_ALLPLANES);
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SetVideoGraphics(Set_ResetIndex, pGC->fgPixel);
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SetVideoGraphics(Bit_MaskIndex, 0xFF);
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SetVideoGraphics(Graphics_ModeIndex, 3); /* Write Mode 3 */
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SetVideoGraphics(Data_RotateIndex, ALU);
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return post_invert;
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#else
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int ALU;
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switch(pGC->alu) {
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case GXclear: /* rop0 = RROP_BLACK; rop1 = RROP_BLACK; */
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pGC->fgPixel = 0;
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pGC->bgPixel = 0;
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ALU = EGC_COPY_MODE;
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break;
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case GXand: /* rop0 = RROP_BLACK; rop1 = RROP_NOP; */
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ALU = EGC_AND_MODE;
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break;
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case GXandReverse: /* rop0 = RROP_BLACK; rop1 = RROP_INVERT; -- TRICKY */
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pGC->fgPixel = ~pGC->fgPixel;
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pGC->bgPixel = ~pGC->bgPixel;
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ALU = EGC_OR_INV_MODE;
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break;
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case GXcopy: /* rop0 = RROP_BLACK; rop1 = RROP_WHITE; */
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ALU = EGC_COPY_MODE;
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break;
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case GXandInverted: /* rop0 = RROP_NOP; rop1 = RROP_BLACK; */
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pGC->fgPixel = ~pGC->fgPixel;
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pGC->bgPixel = ~pGC->bgPixel;
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ALU = EGC_AND_MODE;
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break;
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case GXnoop: /* rop0 = RROP_NOP; rop1 = RROP_NOP; */
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return 0;
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case GXxor: /* rop0 = RROP_NOP; rop1 = RROP_INVERT; */
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ALU = EGC_XOR_MODE;
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break;
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case GXor: /* rop0 = RROP_NOP; rop1 = RROP_WHITE; */
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ALU = EGC_OR_MODE;
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break;
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case GXnor: /* rop0 = RROP_INVERT; rop1 = RROP_BLACK; -- TRICKY*/
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ALU = EGC_OR_INV_MODE;
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break;
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case GXequiv: /* rop0 = RROP_INVERT; rop1 = RROP_NOP; */
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pGC->fgPixel = ~pGC->fgPixel;
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pGC->bgPixel = ~pGC->bgPixel;
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ALU = EGC_XOR_MODE;
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break;
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case GXinvert: /* rop0 = RROP_INVERT; rop1 = RROP_INVERT; */
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pGC->fgPixel = 0x0F;
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pGC->bgPixel = 0x0F;
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ALU = EGC_XOR_MODE;
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break;
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case GXorReverse: /* rop0 = RROP_INVERT; rop1 = RROP_WHITE; -- TRICKY */
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pGC->fgPixel = ~pGC->fgPixel;
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pGC->bgPixel = ~pGC->bgPixel;
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ALU = EGC_AND_INV_MODE;
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break;
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case GXcopyInverted: /* rop0 = RROP_WHITE; rop1 = RROP_BLACK; */
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pGC->fgPixel = ~pGC->fgPixel;
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pGC->bgPixel = ~pGC->bgPixel;
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ALU = EGC_COPY_MODE;
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break;
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case GXorInverted: /* rop0 = RROP_WHITE; rop1 = RROP_NOP; */
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pGC->fgPixel = ~pGC->fgPixel;
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pGC->bgPixel = ~pGC->bgPixel;
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ALU = EGC_OR_MODE;
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break;
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case GXnand: /* rop0 = RROP_WHITE; rop1 = RROP_INVERT; -- TRICKY */
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ALU = EGC_OR_INV_MODE;
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break;
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case GXset: /* rop0 = RROP_WHITE; rop1 = RROP_WHITE; */
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pGC->fgPixel = 0x0F;
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pGC->bgPixel = 0x0F;
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ALU = EGC_COPY_MODE;
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break;
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}
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outw(EGC_PLANE, ~(pGC->planemask & VGA_ALLPLANES));
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outw(EGC_MODE, ALU);
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outw(EGC_FGC, pGC->fgPixel & VGA_ALLPLANES); /* set FGC */
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return 0;
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#endif
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}
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/*
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Now we will have to set the alu.
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Problematic is: How do we handle IsDoubleDash, which draws with both fg
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and bg colour?
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The answer is: We take care to store the ink colour in one register only.
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Then we need set only this register to change the ink.
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*/
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/* -- MORE NOTES:
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We might try to 'wrap' the mfb functions in a 16-colour wrapper that does
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all operations once. However, this does not work:
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Some operations (esp) CopyArea may for example cause expositions.
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Such expositions will cause data to be copied in from backing store,
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and this copying in may damage the contents of the VGA registers.
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So we must take care to set the VGA registers at each place where they could
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be modified.
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*/
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