1 files changed, 89 insertions, 0 deletions
diff --git a/src/newport_shadow.c b/src/newport_shadow.c
new file mode 100644
index 0000000..cfbf522
--- /dev/null
+++ b/src/newport_shadow.c
@@ -0,0 +1,89 @@
+/* 
+ * Id: newport_shadow.c,v 1.3 2000/11/29 20:58:10 agx Exp $
+ */
+/* $XFree86: xc/programs/Xserver/hw/xfree86/drivers/newport/newport_shadow.c,v 1.3 2002/09/30 22:17:55 alanh Exp $ */
+
+#include "newport.h"
+
+void
+NewportRefreshArea8(ScrnInfoPtr pScrn, int num, BoxPtr pbox)
+{
+	int dx, dy, x;
+	CARD32 *base, *src;
+	NewportPtr pNewport = NEWPORTPTR(pScrn);
+	NewportRegsPtr pNewportRegs = pNewport->pNewportRegs;
+
+#define RA8_BYTES	4	/* burst 4 pixels each time */
+#define RA8_BYTE_SHIFT  2 	/* 4 Pixels on each burst, so divide ShadowPitch by 4 */
+#define RA8_MASK        0xffc   /* move to 4 byte boundary   */
+
+	TRACE_ENTER("NewportRefreshArea8");
+	NewportWait(pNewportRegs);
+	pNewportRegs->set.drawmode0 = (NPORT_DMODE0_DRAW | 
+					NPORT_DMODE0_BLOCK | 
+					NPORT_DMODE0_CHOST);
+	while(num--) {
+		NewportWait(pNewportRegs);
+		x = pbox->x1 & RA8_MASK;  	/* move x to 4 byte boundary */
+		base = pNewport->ShadowPtr 
+				+ (pbox->y1 * (pNewport->ShadowPitch >> RA8_BYTE_SHIFT) ) 
+				+ ( x >> RA8_BYTE_SHIFT);
+
+		pNewportRegs->set.xystarti = (x << 16) | pbox->y1;
+		pNewportRegs->set.xyendi = ((pbox->x2-1) << 16) | (pbox->y2-1);
+
+		for ( dy = pbox->y1; dy < pbox->y2; dy++) {
+
+			src = base;
+			for ( dx = x; dx < pbox->x2; dx += RA8_BYTES) {
+				pNewportRegs->go.hostrw0 = *src;  
+				src++;
+			}
+			base += ( pNewport->ShadowPitch >> RA8_BYTE_SHIFT );
+		}
+		pbox++;
+	}
+	TRACE_EXIT("NewportRefreshArea8");
+}
+
+
+void
+NewportRefreshArea24(ScrnInfoPtr pScrn, int num, BoxPtr pbox)
+{
+	int dx, dy;
+	CARD8 *src, *base;
+	CARD32 dest;
+	NewportPtr pNewport = NEWPORTPTR(pScrn);
+	NewportRegsPtr pNewportRegs = pNewport->pNewportRegs;
+
+	TRACE_ENTER("NewportRefreshArea24");
+	NewportWait(pNewportRegs);
+
+	/* block transfers */
+	pNewportRegs->set.drawmode0 = (NPORT_DMODE0_DRAW | 
+					NPORT_DMODE0_BLOCK | 
+					NPORT_DMODE0_CHOST);
+
+	while(num--) {
+		base = (CARD8*)pNewport->ShadowPtr + pbox->y1 * pNewport->ShadowPitch + pbox->x1 * 3;
+		
+		pNewportRegs->set.xystarti = (pbox->x1 << 16) | pbox->y1;
+		pNewportRegs->set.xyendi = ((pbox->x2-1) << 16) | (pbox->y2-1);
+		
+		for ( dy = pbox->y1; dy < pbox->y2; dy++) {
+			src = base;
+			for ( dx = pbox->x1 ;  dx < pbox->x2 ; dx++) {
+				/* Removing these shifts by using 32bpp fb
+				 * yields < 2% percent performance gain and wastes 25% memory 
+				 */
+				dest = src[0] | src[1] << 8 | src[2] << 16;
+				pNewportRegs->go.hostrw0 = dest;	
+				src+=3;
+ 			}
+			base += pNewport->ShadowPitch;
+ 		}
+ 		pbox++;
+ 	}
+	TRACE_EXIT("NewportRefreshArea24");
+}
+