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Diffstat (limited to 'xorg-server/hw/xfree86/xf4bpp/ppcCReduce.c')
-rw-r--r--xorg-server/hw/xfree86/xf4bpp/ppcCReduce.c237
1 files changed, 237 insertions, 0 deletions
diff --git a/xorg-server/hw/xfree86/xf4bpp/ppcCReduce.c b/xorg-server/hw/xfree86/xf4bpp/ppcCReduce.c
new file mode 100644
index 000000000..c567e6fd1
--- /dev/null
+++ b/xorg-server/hw/xfree86/xf4bpp/ppcCReduce.c
@@ -0,0 +1,237 @@
+/*
+ * Copyright IBM Corporation 1987,1988,1989
+ *
+ * All Rights Reserved
+ *
+ * Permission to use, copy, modify, and distribute this software and its
+ * documentation for any purpose and without fee is hereby granted,
+ * provided that the above copyright notice appear in all copies and that
+ * both that copyright notice and this permission notice appear in
+ * supporting documentation, and that the name of IBM not be
+ * used in advertising or publicity pertaining to distribution of the
+ * software without specific, written prior permission.
+ *
+ * IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+ * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
+ * IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+ * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ * ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+ * SOFTWARE.
+ *
+*/
+
+#ifdef HAVE_XORG_CONFIG_H
+#include <xorg-config.h>
+#endif
+
+#include "xf4bpp.h"
+#include "ppcGCstr.h"
+
+/* xf4bppGetReducedColorRrop( pGC, drawableDepth, returnLoc )
+ * An attempt to do "strength reduction" on color raster-ops
+ * P. Shupak 1/88
+ */
+
+static void
+ppcReduceGeneral
+(
+ register int alu,
+ register unsigned long pm,
+ register unsigned long fg,
+ register unsigned long bg,
+ register int fillStyle,
+ int drawableDepth,
+ ppcReducedRrop *returnLoc
+)
+{
+
+if ( ( alu == GXnoop )
+ || !( pm &= ( ( 1 << drawableDepth ) - 1 ) ) ) {
+ returnLoc->alu = GXnoop ;
+ return ;
+}
+
+#ifdef DELETE_THIS
+switch ( fillStyle ) {
+ case FillTiled:
+ switch ( alu ) {
+ case GXclear: /* 0x0 Zero 0 */
+ case GXinvert: /* 0xa NOT dst */
+ case GXset: /* 0xf 1 */
+ fillStyle = FillSolid ;
+ default: /* We Can't Do Much Here */
+ break ;
+ }
+ break ;
+ case FillOpaqueStippled:
+ if ( ( fg & pm ) != ( bg & pm ) ) { /* else FillSolid */
+ switch ( alu ) {
+ case GXclear: /* 0x0 Zero 0 */
+ case GXset: /* 0xf 1 */
+ case GXinvert: /* 0xa NOT dst */
+ fillStyle = FillSolid ;
+ break ;
+ case GXnor: /* 0x8 NOT src AND NOT dst */
+ case GXnand: /* 0xe NOT src OR NOT dst */
+ case GXcopy: /* 0x3 src */
+ break ;
+ case GXandReverse: /* 0x2 src AND NOT dst */
+ fg = ~fg ;
+ bg = ~bg ;
+ alu = GXnor ;
+ break ;
+ case GXandInverted: /* 0x4 NOT src AND dst */
+ fg = ~fg ;
+ bg = ~bg ;
+ alu = GXand ; /* Fall Through */
+ case GXand: /* 0x1 src AND dst */
+ pm &= ~( fg & bg ) ;
+ if ( ( bg & pm ) == pm ) {
+ fillStyle = FillStippled ;
+ alu = GXclear ;
+ }
+ break ;
+ case GXequiv: /* 0x9 NOT src XOR dst */
+ fg = ~fg ;
+ bg = ~bg ;
+ alu = GXxor ; /* Fall Through */
+ case GXxor: /* 0x6 src XOR dst */
+ pm &= ( fg | bg ) ;
+ if ( !( bg & pm ) ) {
+ fillStyle = FillStippled ;
+ alu = GXinvert ;
+ }
+ break ;
+ case GXorReverse: /* 0xb src OR NOT dst */
+ fg = ~fg ;
+ bg = ~bg ;
+ alu = GXnand ;
+ break ;
+ case GXcopyInverted: /* 0xc NOT src */
+ fg = ~fg ;
+ bg = ~bg ;
+ alu = GXcopy ;
+ break ;
+ case GXorInverted: /* 0xd NOT src OR dst */
+ fg = ~fg ;
+ bg = ~bg ;
+ alu = GXor ; /* Fall Through */
+ case GXor: /* 0x7 src OR dst */
+ pm &= ( fg | bg ) ;
+ if ( !( bg & pm ) ) {
+ fillStyle = FillStippled ;
+ alu = GXset ;
+ }
+ break ;
+ default:
+ ErrorF(
+ "xf4bppGetReducedColorRrop: Unknown Alu Raster-Op" ) ;
+ break ;
+ }
+ break ; /* Don't Fall Through */
+ }
+ else
+ fillStyle = FillSolid ;
+ /* Fall Through */
+ case FillStippled:
+ case FillSolid:
+ switch ( alu ) {
+ case GXclear: /* 0x0 Zero 0 */
+ case GXset: /* 0xf 1 */
+ case GXinvert: /* 0xa NOT dst */
+ break ;
+ case GXand: /* 0x1 src AND dst */
+ pm &= ~fg ;
+ alu = GXclear ;
+ break ;
+ case GXandReverse: /* 0x2 src AND NOT dst */
+ fg = ~fg ;
+ alu = GXnor ; /* Fall Through */
+ case GXnor: /* 0x8 NOT src AND NOT dst */
+ if ( !( fg & pm ) )
+ alu = GXclear ;
+ else if ( ( fg & pm ) == pm )
+ alu = GXinvert ;
+ break ;
+ case GXandInverted: /* 0x4 NOT src AND dst */
+ pm &= fg ;
+ alu = GXclear ;
+ break ;
+ case GXxor: /* 0x6 src XOR dst */
+ pm &= fg ;
+ alu = GXinvert ;
+ break ;
+ case GXor: /* 0x7 src OR dst */
+ pm &= fg ;
+ alu = GXset ;
+ break ;
+ case GXequiv: /* 0x9 NOT src XOR dst */
+ pm &= ~fg ;
+ alu = GXinvert ;
+ break ;
+ case GXorReverse: /* 0xb src OR NOT dst */
+ fg = ~fg ;
+ alu = GXnand ; /* Fall Through */
+ case GXnand: /* 0xe NOT src OR NOT dst */
+ if ( !( fg & pm ) )
+ alu = GXset ;
+ else if ( ( fg & pm ) == pm )
+ alu = GXinvert ;
+ break ;
+ case GXcopyInverted: /* 0xc NOT src */
+ fg = ~fg ;
+ alu = GXcopy ; /* Fall Through */
+ case GXcopy: /* 0x3 src */
+ if ( !( fg & pm ) )
+ alu = GXclear ;
+ else if ( ( fg & pm ) == pm )
+ alu = GXset ;
+ break ;
+ case GXorInverted: /* 0xd NOT src OR dst */
+ pm &= ~fg ;
+ alu = GXset ;
+ break ;
+ default:
+ ErrorF(
+ "xf4bppGetReducedColorRrop: Unknown Alu Raster-Op" ) ;
+ break ;
+ }
+ break;
+ default:
+ ErrorF("xf4bppGetReducedColorRrop: Bad Fillstyle\n");
+ break;
+}
+#endif
+
+/* Final Test On Restricted Plane Mask */
+if ( !pm )
+ alu = GXnoop ;
+
+/* Set Actual Returned Values */
+returnLoc->planemask = pm ;
+returnLoc->fgPixel = fg ;
+returnLoc->bgPixel = bg ;
+returnLoc->alu = alu ;
+returnLoc->fillStyle = fillStyle ;
+
+return ;
+}
+
+void
+xf4bppGetReducedColorRrop( pGC, drawableDepth, returnLoc )
+GC *pGC ;
+int drawableDepth ;
+ppcReducedRrop *returnLoc ;
+{
+
+ppcReduceGeneral( pGC->alu,
+ pGC->planemask,
+ pGC->fgPixel,
+ pGC->bgPixel,
+ pGC->fillStyle,
+ drawableDepth,
+ returnLoc ) ;
+
+return ;
+}