drisw: Simplify GC setup

There's no reason to have two GCs here. The only difference between
them is that swapgc would generate graphics exposures, except we only
ever use this GC for PutImage, and PutImage doesn't generate graphics
exposures. We also don't need to explicitly ChangeGC to GXCopy, because
that's the default.

Reviewed-by: Eric Anholt <eric@anholt.net>

diff --git a/src/glx/drisw_glx.c b/src/glx/drisw_glx.c
index f38dbbca2dffee18ce327724774f9b62ba1ce65c..b3e00f9a4e010b47cca0e6b8a762efba830006ee 100644 (file)
--- a/src/glx/drisw_glx.c
+++ b/src/glx/drisw_glx.c
@@ -32,23 +32,14 @@
 #include <assert.h>
 
 static Bool
-XCreateGCs(struct drisw_drawable * pdp,
-           Display * dpy, XID drawable, int visualid)
+driswCreateGCs(struct drisw_drawable * pdp,
+               Display * dpy, XID drawable, int visualid)
 {
-   XGCValues gcvalues;
    long visMask;
    XVisualInfo visTemp;
    int num_visuals;
 
-   /* create GC's */
    pdp->gc = XCreateGC(dpy, drawable, 0, NULL);
-   pdp->swapgc = XCreateGC(dpy, drawable, 0, NULL);
-
-   gcvalues.function = GXcopy;
-   gcvalues.graphics_exposures = False;
-   XChangeGC(dpy, pdp->gc, GCFunction, &gcvalues);
-   XChangeGC(dpy, pdp->swapgc, GCFunction, &gcvalues);
-   XChangeGC(dpy, pdp->swapgc, GCGraphicsExposures, &gcvalues);
 
    /* visual */
    visTemp.visualid = visualid;
@@ -152,7 +143,6 @@ XDestroyDrawable(struct drisw_drawable * pdp, Display * dpy, XID drawable)
    free(pdp->visinfo);
 
    XFreeGC(dpy, pdp->gc);
-   XFreeGC(dpy, pdp->swapgc);
 }
 
 /**
@@ -212,24 +202,13 @@ swrastXPutImage(__DRIdrawable * draw, int op,
    Display *dpy = pdraw->psc->dpy;
    Drawable drawable;
    XImage *ximage;
-   GC gc;
+   GC gc = pdp->gc;
 
    if (!pdp->ximage || shmid != pdp->shminfo.shmid) {
       if (!XCreateDrawable(pdp, shmid, dpy))
          return;
    }
 
-   switch (op) {
-   case __DRI_SWRAST_IMAGE_OP_DRAW:
-      gc = pdp->gc;
-      break;
-   case __DRI_SWRAST_IMAGE_OP_SWAP:
-      gc = pdp->swapgc;
-      break;
-   default:
-      return;
-   }
-
    drawable = pdraw->xDrawable;
    ximage = pdp->ximage;
    ximage->bytes_per_line = stride ? stride : bytes_per_line(w * ximage->bits_per_pixel, 32);
@@ -699,7 +678,7 @@ driswCreateDrawable(struct glx_screen *base, XID xDrawable,
    pdp->base.drawable = drawable;
    pdp->base.psc = &psc->base;
 
-   ret = XCreateGCs(pdp, psc->base.dpy, xDrawable, modes->visualID);
+   ret = driswCreateGCs(pdp, psc->base.dpy, xDrawable, modes->visualID);
    if (!ret) {
       free(pdp);
       return NULL;

diff --git a/src/glx/drisw_priv.h b/src/glx/drisw_priv.h
index 259fc864f6ad00c2da30698ffcb86defbfd8b6e8..816d1d87cc9095bd6dcdfc52169cffe394257715 100644 (file)
--- a/src/glx/drisw_priv.h
+++ b/src/glx/drisw_priv.h
@@ -62,7 +62,6 @@ struct drisw_drawable
    __GLXDRIdrawable base;
 
    GC gc;
-   GC swapgc;
 
    __DRIdrawable *driDrawable;
    XVisualInfo *visinfo;