Mesa (master): st/xorg: Fix DRI2 CopyRegion hook.

[Michel Dänzer]

Module: Mesa
Branch: master
Commit: 7ef8c79a8c69d62eecbd4301b0e15d44d0797072
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=7ef8c79a8c69d62eecbd4301b0e15d44d0797072

Author: Michel Dänzer <daenzer at vmware.com>
Date:   Thu Aug 13 18:46:53 2009 +0200

st/xorg: Fix DRI2 CopyRegion hook.

Use GC CopyArea op for proper translation and clipping, and throttle full
buffer swaps / frontbuffer flushes.

---

 src/gallium/state_trackers/xorg/xorg_dri2.c |   72 ++++++++++++++++-----------
 1 files changed, 43 insertions(+), 29 deletions(-)

diff --git a/src/gallium/state_trackers/xorg/xorg_dri2.c b/src/gallium/state_trackers/xorg/xorg_dri2.c
index 301e521..3fbab4d 100644
--- a/src/gallium/state_trackers/xorg/xorg_dri2.c
+++ b/src/gallium/state_trackers/xorg/xorg_dri2.c
@@ -45,6 +45,7 @@ typedef struct {
     PixmapPtr pPixmap;
     struct pipe_texture *tex;
     struct pipe_buffer *buf;
+    struct pipe_fence_handle *fence;
 } *BufferPrivatePtr;
 
 static DRI2BufferPtr
@@ -97,17 +98,11 @@ driCreateBuffers(DrawablePtr pDraw, unsigned int *attachments, int count)
 	    tex = ms->screen->texture_create(ms->screen, &template);
 	    depth = tex;
 	} else {
-	    struct pipe_texture template;
-	    memset(&template, 0, sizeof(template));
-	    template.target = PIPE_TEXTURE_2D;
-	    template.format = PIPE_FORMAT_A8R8G8B8_UNORM;
-	    pf_get_block(template.format, &template.block);
-	    template.width[0] = pDraw->width;
-	    template.height[0] = pDraw->height;
-	    template.depth[0] = 1;
-	    template.last_level = 0;
-	    template.tex_usage = PIPE_TEXTURE_USAGE_RENDER_TARGET;
-	    tex = ms->screen->texture_create(ms->screen, &template);
+	    pPixmap = (*pScreen->CreatePixmap)(pScreen, pDraw->width,
+					       pDraw->height,
+					       pDraw->depth,
+					       0);
+	    tex = xorg_exa_get_texture(pPixmap);
 	}
 
 	if (!tex)
@@ -148,11 +143,12 @@ driDestroyBuffers(DrawablePtr pDraw, DRI2BufferPtr buffers, int count)
     for (i = 0; i < count; i++) {
 	private = buffers[i].driverPrivate;
 
-	if (private->pPixmap)
-	    (*pScreen->DestroyPixmap)(private->pPixmap);
-
 	pipe_texture_reference(&private->tex, NULL);
 	pipe_buffer_reference(&private->buf, NULL);
+        ms->screen->fence_reference(ms->screen, &private->fence, NULL);
+
+	if (private->pPixmap)
+	    (*pScreen->DestroyPixmap)(private->pPixmap);
     }
 
     if (buffers) {
@@ -170,24 +166,42 @@ driCopyRegion(DrawablePtr pDraw, RegionPtr pRegion,
     modesettingPtr ms = modesettingPTR(pScrn);
     BufferPrivatePtr dst_priv = pDestBuffer->driverPrivate;
     BufferPrivatePtr src_priv = pSrcBuffer->driverPrivate;
+    PixmapPtr src_pixmap;
+    PixmapPtr dst_pixmap;
+    GCPtr gc;
+    RegionPtr copy_clip;
+
+    src_pixmap = src_priv->pPixmap;
+    dst_pixmap = dst_priv->pPixmap;
+    if (pSrcBuffer->attachment == DRI2BufferFrontLeft)
+	src_pixmap = (PixmapPtr)pDraw;
+    if (pDestBuffer->attachment == DRI2BufferFrontLeft)
+	dst_pixmap = (PixmapPtr)pDraw;
+    gc = GetScratchGC(pDraw->depth, pScreen);
+    copy_clip = REGION_CREATE(pScreen, NULL, 0);
+    REGION_COPY(pScreen, copy_clip, pRegion);
+    (*gc->funcs->ChangeClip) (gc, CT_REGION, copy_clip, 0);
+    ValidateGC(&dst_pixmap->drawable, gc);
+
+    /* If this is a full buffer swap, throttle on the previous one */
+    if (dst_priv->fence && REGION_NUM_RECTS(pRegion) == 1) {
+	BoxPtr extents = REGION_EXTENTS(pScreen, pRegion);
+
+	if (extents->x1 == 0 && extents->y1 == 0 &&
+	    extents->x2 == pDraw->width && extents->y2 == pDraw->height) {
+	    ms->screen->fence_finish(ms->screen, dst_priv->fence, 0);
+	    ms->screen->fence_reference(ms->screen, &dst_priv->fence, NULL);
+	}
+    }
 
-    struct pipe_surface *dst_surf =
-	ms->screen->get_tex_surface(ms->screen, dst_priv->tex, 0, 0, 0,
-				    PIPE_BUFFER_USAGE_GPU_WRITE);
-    struct pipe_surface *src_surf =
-	ms->screen->get_tex_surface(ms->screen, src_priv->tex, 0, 0, 0,
-				    PIPE_BUFFER_USAGE_GPU_READ);
+    (*gc->ops->CopyArea)(&src_pixmap->drawable, &dst_pixmap->drawable, gc,
+			 0, 0, pDraw->width, pDraw->height, 0, 0);
 
-#if 1
-    ms->ctx->surface_copy(ms->ctx, dst_surf, 0, 0, src_surf,
-			  0, 0, pDraw->width, pDraw->height);
-#else
-    util_surface_copy(ms->ctx, false, dst_surf, 0, 0, src_surf,
-		      0, 0, pDraw->width, pDraw->height);
-#endif
+    FreeScratchGC(gc);
 
-    pipe_surface_reference(&dst_surf, NULL);
-    pipe_surface_reference(&src_surf, NULL);
+    ms->ctx->flush(ms->ctx, PIPE_FLUSH_SWAPBUFFERS,
+		   pDestBuffer->attachment == DRI2BufferFrontLeft ?
+		   &dst_priv->fence : NULL);
 }
 
 Bool