From 27195d7dba0f3ff08b92f3fd916cdf5113cbef58 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Wed, 31 Mar 2010 20:30:27 +0100
Subject: [PATCH] uxa: Try using put_image when copying from a memory buffer.

Often, for example in the fallback for ShmPutImage, we will attempt to
use uxa_copy_area() copying to a normal pixmap from a memory buffer.
This triggers a fallback, and maps the destination pixmap back into the
GTT. The accelerated put_image path will attempt to stream a blit to the
destination pixmap if it is currently active, avoiding the stall.
---
 uxa/uxa-accel.c | 51 +++++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 43 insertions(+), 8 deletions(-)

diff --git a/uxa/uxa-accel.c b/uxa/uxa-accel.c
index 7fb4bf98..c022956c 100644
--- a/uxa/uxa-accel.c
+++ b/uxa/uxa-accel.c
@@ -470,18 +470,19 @@ uxa_copy_n_to_n(DrawablePtr pSrcDrawable,
 		goto fallback;
 	}
 
-	if (!uxa_pixmap_is_offscreen(pSrcPixmap) ||
-	    !uxa_pixmap_is_offscreen(pDstPixmap) ||
-	    !(*uxa_screen->info->prepare_copy) (pSrcPixmap, pDstPixmap,
+	if (!uxa_pixmap_is_offscreen(pDstPixmap))
+	    goto fallback;
+
+	if (uxa_pixmap_is_offscreen(pSrcPixmap)) {
+	    if (!(*uxa_screen->info->prepare_copy) (pSrcPixmap, pDstPixmap,
 						reverse ? -1 : 1,
 						upsidedown ? -1 : 1,
 						pGC ? pGC->alu : GXcopy,
 						pGC ? pGC->
-						planemask : FB_ALLONES)) {
+						planemask : FB_ALLONES))
 		goto fallback;
-	}
 
-	while (nbox--) {
+	    while (nbox--) {
 		(*uxa_screen->info->copy) (pDstPixmap,
 					   pbox->x1 + dx + src_off_x,
 					   pbox->y1 + dy + src_off_y,
@@ -490,9 +491,43 @@ uxa_copy_n_to_n(DrawablePtr pSrcDrawable,
 					   pbox->x2 - pbox->x1,
 					   pbox->y2 - pbox->y1);
 		pbox++;
-	}
+	    }
 
-	(*uxa_screen->info->done_copy) (pDstPixmap);
+	    (*uxa_screen->info->done_copy) (pDstPixmap);
+	} else {
+	    int stride, bpp;
+	    char *src;
+
+	    if (!uxa_screen->info->put_image)
+		goto fallback;
+
+	    /* Don't bother with under 8bpp, XYPixmaps. */
+	    bpp = pSrcPixmap->drawable.bitsPerPixel;
+	    if (bpp != pDstDrawable->bitsPerPixel || bpp < 8)
+		goto fallback;
+
+	    /* Only accelerate copies: no rop or planemask. */
+	    if (pGC && (!UXA_PM_IS_SOLID(pSrcDrawable, pGC->planemask) || pGC->alu != GXcopy))
+		goto fallback;
+
+	    src = pSrcPixmap->devPrivate.ptr;
+	    stride = pSrcPixmap->devKind;
+	    bpp /= 8;
+	    while (nbox--) {
+		if (!uxa_screen->info->put_image(pDstPixmap,
+						 pbox->x1 + dst_off_x,
+						 pbox->y1 + dst_off_y,
+						 pbox->x2 - pbox->x1,
+						 pbox->y2 - pbox->y1,
+						 (char *) src +
+						 (pbox->y1 + dy + src_off_y) * stride +
+						 (pbox->x1 + dx + src_off_x) * bpp,
+						 stride))
+		    goto fallback;
+
+		pbox++;
+	    }
+	}
 
 	return;