Initial revision

1 files changed, 207 insertions, 0 deletions

diff --git a/hw/xfree86/xf4bpp/wm3.c b/hw/xfree86/xf4bpp/wm3.c
new file mode 100644
index 000000000..3509ce77f
--- /dev/null
+++ b/hw/xfree86/xf4bpp/wm3.c
@@ -0,0 +1,207 @@
+/* $XFree86: xc/programs/Xserver/hw/xfree86/xf4bpp/wm3.c,v 1.4 2002/01/25 21:56:23 tsi Exp $ */
+
+
+
+
+
+/* $XConsortium: wm3.c /main/5 1996/02/21 17:59:21 kaleb $ */
+
+#include "xf4bpp.h"
+#include "OScompiler.h"
+#include "wm3.h"
+#include "vgaVideo.h"
+#include "xf86.h"
+
+/* Ferraro is wrong. GJA */
+#define COPY (0 << 3)
+#define AND  (1 << 3)
+#define OR   (2 << 3)
+#define XOR  (3 << 3)
+
+int
+wm3_set_regs(pGC)
+GC *pGC;
+{
+#ifndef	PC98_EGC
+    IOADDRESS REGBASE = xf86Screens[pGC->pScreen->myNum]->domainIOBase + 0x300;
+    int post_invert = 0;
+    int ALU;
+
+    switch(pGC->alu) {
+    case GXclear:        /* rop0 = RROP_BLACK;  rop1 = RROP_BLACK; */
+        pGC->fgPixel = 0;
+        pGC->bgPixel = 0;
+        ALU = COPY;
+        break;
+    case GXand:          /* rop0 = RROP_BLACK;  rop1 = RROP_NOP; */
+        ALU = AND;
+        break;
+    case GXandReverse:   /* rop0 = RROP_BLACK;  rop1 = RROP_INVERT; -- TRICKY */
+        pGC->fgPixel = ~pGC->fgPixel;
+        pGC->bgPixel = ~pGC->bgPixel;
+        ALU = OR;
+        post_invert = 1;
+        break;
+    case GXcopy:         /* rop0 = RROP_BLACK;  rop1 = RROP_WHITE; */
+        ALU = COPY;
+        break;
+    case GXandInverted:  /* rop0 = RROP_NOP;    rop1 = RROP_BLACK; */
+        pGC->fgPixel = ~pGC->fgPixel;
+        pGC->bgPixel = ~pGC->bgPixel;
+        ALU = AND;
+        break;
+    default:
+    case GXnoop:         /* rop0 = RROP_NOP;    rop1 = RROP_NOP; */
+        return 0;
+    case GXxor:          /* rop0 = RROP_NOP;    rop1 = RROP_INVERT; */
+        ALU = XOR;
+        break;
+    case GXor:           /* rop0 = RROP_NOP;    rop1 = RROP_WHITE; */
+        ALU = OR;
+        break;
+    case GXnor:          /* rop0 = RROP_INVERT; rop1 = RROP_BLACK; -- TRICKY*/
+        ALU = OR;
+        post_invert = 1;
+        break;
+    case GXequiv:        /* rop0 = RROP_INVERT; rop1 = RROP_NOP; */
+        pGC->fgPixel = ~pGC->fgPixel;
+        pGC->bgPixel = ~pGC->bgPixel;
+        ALU = XOR;
+        break;
+    case GXinvert:       /* rop0 = RROP_INVERT; rop1 = RROP_INVERT; */
+        pGC->fgPixel = 0x0F;
+        pGC->bgPixel = 0x0F;
+        ALU = XOR;
+        break;
+    case GXorReverse:    /* rop0 = RROP_INVERT; rop1 = RROP_WHITE; -- TRICKY */
+        pGC->fgPixel = ~pGC->fgPixel;
+        pGC->bgPixel = ~pGC->bgPixel;
+        ALU = AND;
+        post_invert = 1;
+        break;
+    case GXcopyInverted: /* rop0 = RROP_WHITE;  rop1 = RROP_BLACK; */
+        pGC->fgPixel = ~pGC->fgPixel;
+        pGC->bgPixel = ~pGC->bgPixel;
+        ALU = COPY;
+        break;
+    case GXorInverted:   /* rop0 = RROP_WHITE;  rop1 = RROP_NOP; */
+        pGC->fgPixel = ~pGC->fgPixel;
+        pGC->bgPixel = ~pGC->bgPixel;
+        ALU = OR;
+        break;
+    case GXnand:         /* rop0 = RROP_WHITE;  rop1 = RROP_INVERT; -- TRICKY */
+        ALU = AND;
+        post_invert = 1;
+        break;
+    case GXset:          /* rop0 = RROP_WHITE;  rop1 = RROP_WHITE; */
+        pGC->fgPixel = 0x0F;
+        pGC->bgPixel = 0x0F;
+        ALU = COPY;
+        break;
+    }
+
+
+    SetVideoSequencer(Mask_MapIndex, (pGC->planemask & VGA_ALLPLANES));
+    SetVideoGraphics(Enb_Set_ResetIndex, VGA_ALLPLANES);
+    SetVideoGraphics(Set_ResetIndex, pGC->fgPixel);
+    SetVideoGraphics(Bit_MaskIndex, 0xFF);
+    SetVideoGraphics(Graphics_ModeIndex, 3); /* Write Mode 3 */
+    SetVideoGraphics(Data_RotateIndex, ALU);
+
+    return post_invert;
+#else
+    int ALU;
+
+    switch(pGC->alu) {
+    case GXclear:        /* rop0 = RROP_BLACK;  rop1 = RROP_BLACK; */
+        pGC->fgPixel = 0;
+        pGC->bgPixel = 0;
+        ALU = EGC_COPY_MODE;
+        break;
+    case GXand:          /* rop0 = RROP_BLACK;  rop1 = RROP_NOP; */
+        ALU = EGC_AND_MODE;
+        break;
+    case GXandReverse:   /* rop0 = RROP_BLACK;  rop1 = RROP_INVERT; -- TRICKY */
+        pGC->fgPixel = ~pGC->fgPixel;
+        pGC->bgPixel = ~pGC->bgPixel;
+        ALU = EGC_OR_INV_MODE;
+        break;
+    case GXcopy:         /* rop0 = RROP_BLACK;  rop1 = RROP_WHITE; */
+        ALU = EGC_COPY_MODE;
+        break;
+    case GXandInverted:  /* rop0 = RROP_NOP;    rop1 = RROP_BLACK; */
+        pGC->fgPixel = ~pGC->fgPixel;
+        pGC->bgPixel = ~pGC->bgPixel;
+        ALU = EGC_AND_MODE;
+        break;
+    case GXnoop:         /* rop0 = RROP_NOP;    rop1 = RROP_NOP; */
+        return 0;
+    case GXxor:          /* rop0 = RROP_NOP;    rop1 = RROP_INVERT; */
+        ALU = EGC_XOR_MODE;
+        break;
+    case GXor:           /* rop0 = RROP_NOP;    rop1 = RROP_WHITE; */
+        ALU = EGC_OR_MODE;
+        break;
+    case GXnor:          /* rop0 = RROP_INVERT; rop1 = RROP_BLACK; -- TRICKY*/
+        ALU = EGC_OR_INV_MODE;
+        break;
+    case GXequiv:        /* rop0 = RROP_INVERT; rop1 = RROP_NOP; */
+        pGC->fgPixel = ~pGC->fgPixel;
+        pGC->bgPixel = ~pGC->bgPixel;
+        ALU = EGC_XOR_MODE;
+        break;
+    case GXinvert:       /* rop0 = RROP_INVERT; rop1 = RROP_INVERT; */
+        pGC->fgPixel = 0x0F;
+        pGC->bgPixel = 0x0F;
+        ALU = EGC_XOR_MODE;
+        break;
+    case GXorReverse:    /* rop0 = RROP_INVERT; rop1 = RROP_WHITE; -- TRICKY */
+        pGC->fgPixel = ~pGC->fgPixel;
+        pGC->bgPixel = ~pGC->bgPixel;
+        ALU = EGC_AND_INV_MODE;
+        break;
+    case GXcopyInverted: /* rop0 = RROP_WHITE;  rop1 = RROP_BLACK; */
+        pGC->fgPixel = ~pGC->fgPixel;
+        pGC->bgPixel = ~pGC->bgPixel;
+        ALU = EGC_COPY_MODE;
+        break;
+    case GXorInverted:   /* rop0 = RROP_WHITE;  rop1 = RROP_NOP; */
+        pGC->fgPixel = ~pGC->fgPixel;
+        pGC->bgPixel = ~pGC->bgPixel;
+        ALU = EGC_OR_MODE;
+        break;
+    case GXnand:         /* rop0 = RROP_WHITE;  rop1 = RROP_INVERT; -- TRICKY */
+        ALU = EGC_OR_INV_MODE;
+        break;
+    case GXset:          /* rop0 = RROP_WHITE;  rop1 = RROP_WHITE; */
+        pGC->fgPixel = 0x0F;
+        pGC->bgPixel = 0x0F;
+        ALU = EGC_COPY_MODE;
+        break;
+    }
+
+    outw(EGC_PLANE, ~(pGC->planemask & VGA_ALLPLANES));
+    outw(EGC_MODE, ALU);
+    outw(EGC_FGC, pGC->fgPixel & VGA_ALLPLANES); /* set FGC */
+
+    return 0;
+#endif
+}
+
+/*
+   Now we will have to set the alu.
+   Problematic is: How do we handle IsDoubleDash, which draws with both fg
+   and bg colour?
+   The answer is: We take care to store the ink colour in one register only.
+   Then we need set only this register to change the ink.
+ */
+ 
+/* -- MORE NOTES:
+   We might try to 'wrap' the mfb functions in a 16-colour wrapper that does
+   all operations once. However, this does not work:
+   Some operations (esp) CopyArea may for example cause expositions.
+   Such expositions will cause data to be copied in from backing store,
+   and this copying in may damage the contents of the VGA registers.
+   So we must take care to set the VGA registers at each place where they could
+   be modified.
+ */