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Diffstat (limited to 'xorg-server/fb/fbarc.c')
-rw-r--r--xorg-server/fb/fbarc.c294
1 files changed, 145 insertions, 149 deletions
diff --git a/xorg-server/fb/fbarc.c b/xorg-server/fb/fbarc.c
index 1da980255..a0c5343e0 100644
--- a/xorg-server/fb/fbarc.c
+++ b/xorg-server/fb/fbarc.c
@@ -1,149 +1,145 @@
-/*
- * Copyright © 1998 Keith Packard
- *
- * Permission to use, copy, modify, distribute, and sell this software and its
- * documentation for any purpose is hereby granted without fee, 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 Keith Packard not be used in
- * advertising or publicity pertaining to distribution of the software without
- * specific, written prior permission. Keith Packard makes no
- * representations about the suitability of this software for any purpose. It
- * is provided "as is" without express or implied warranty.
- *
- * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
- * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
- * EVENT SHALL KEITH PACKARD 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_DIX_CONFIG_H
-#include <dix-config.h>
-#endif
-
-#include "fb.h"
-#include "mizerarc.h"
-#include <limits.h>
-
-typedef void (*FbArc) (FbBits *dst,
- FbStride dstStride,
- int dstBpp,
- xArc *arc,
- int dx,
- int dy,
- FbBits and,
- FbBits xor);
-
-void
-fbPolyArc (DrawablePtr pDrawable,
- GCPtr pGC,
- int narcs,
- xArc *parcs)
-{
- FbArc arc;
-
- if (pGC->lineWidth == 0)
- {
-#ifndef FBNOPIXADDR
- arc = 0;
- if (pGC->lineStyle == LineSolid && pGC->fillStyle == FillSolid)
- {
- switch (pDrawable->bitsPerPixel)
- {
- case 8: arc = fbArc8; break;
- case 16: arc = fbArc16; break;
-#ifdef FB_24BIT
- case 24: arc = fbArc24; break;
-#endif
- case 32: arc = fbArc32; break;
- }
- }
- if (arc)
- {
- FbGCPrivPtr pPriv = fbGetGCPrivate (pGC);
- FbBits *dst;
- FbStride dstStride;
- int dstBpp;
- int dstXoff, dstYoff;
- BoxRec box;
- int x2, y2;
- RegionPtr cclip;
- int wrapped = 0;
-
- cclip = fbGetCompositeClip (pGC);
- fbGetDrawable (pDrawable, dst, dstStride, dstBpp, dstXoff, dstYoff);
-#ifdef FB_ACCESS_WRAPPER
- wrapped = 1;
-#else
- wrapped = 0;
-#endif
- while (narcs--)
- {
- if (miCanZeroArc (parcs))
- {
- box.x1 = parcs->x + pDrawable->x;
- box.y1 = parcs->y + pDrawable->y;
- /*
- * Because box.x2 and box.y2 get truncated to 16 bits, and the
- * RECT_IN_REGION test treats the resulting number as a signed
- * integer, the RECT_IN_REGION test alone can go the wrong way.
- * This can result in a server crash because the rendering
- * routines in this file deal directly with cpu addresses
- * of pixels to be stored, and do not clip or otherwise check
- * that all such addresses are within their respective pixmaps.
- * So we only allow the RECT_IN_REGION test to be used for
- * values that can be expressed correctly in a signed short.
- */
- x2 = box.x1 + (int)parcs->width + 1;
- box.x2 = x2;
- y2 = box.y1 + (int)parcs->height + 1;
- box.y2 = y2;
- if ( (x2 <= SHRT_MAX) && (y2 <= SHRT_MAX) &&
- (RegionContainsRect(cclip, &box) == rgnIN) ) {
-#ifdef FB_ACCESS_WRAPPER
- if (!wrapped) {
- fbPrepareAccess (pDrawable);
- wrapped = 1;
- }
-#endif
- (*arc) (dst, dstStride, dstBpp,
- parcs, pDrawable->x + dstXoff, pDrawable->y + dstYoff,
- pPriv->and, pPriv->xor);
- } else {
-#ifdef FB_ACCESS_WRAPPER
- if (wrapped) {
- fbFinishAccess (pDrawable);
- wrapped = 0;
- }
-#endif
- miZeroPolyArc(pDrawable, pGC, 1, parcs);
- }
- }
- else {
-#ifdef FB_ACCESS_WRAPPER
- if (wrapped) {
- fbFinishAccess (pDrawable);
- wrapped = 0;
- }
-#endif
- miPolyArc(pDrawable, pGC, 1, parcs);
- }
- parcs++;
- }
-#ifdef FB_ACCESS_WRAPPER
- if (wrapped) {
- fbFinishAccess (pDrawable);
- wrapped = 0;
- }
-#endif
- }
- else
-#endif
- miZeroPolyArc (pDrawable, pGC, narcs, parcs);
- }
- else
- miPolyArc (pDrawable, pGC, narcs, parcs);
-}
+/*
+ * Copyright © 1998 Keith Packard
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, 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 Keith Packard not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission. Keith Packard makes no
+ * representations about the suitability of this software for any purpose. It
+ * is provided "as is" without express or implied warranty.
+ *
+ * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL KEITH PACKARD 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_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include "fb.h"
+#include "mizerarc.h"
+#include <limits.h>
+
+typedef void (*FbArc) (FbBits *dst,
+ FbStride dstStride,
+ int dstBpp,
+ xArc *arc,
+ int dx,
+ int dy,
+ FbBits and,
+ FbBits xor);
+
+void
+fbPolyArc (DrawablePtr pDrawable,
+ GCPtr pGC,
+ int narcs,
+ xArc *parcs)
+{
+ FbArc arc;
+
+ if (pGC->lineWidth == 0)
+ {
+ arc = 0;
+ if (pGC->lineStyle == LineSolid && pGC->fillStyle == FillSolid)
+ {
+ switch (pDrawable->bitsPerPixel)
+ {
+ case 8: arc = fbArc8; break;
+ case 16: arc = fbArc16; break;
+ case 24: arc = fbArc24; break;
+ case 32: arc = fbArc32; break;
+ }
+ }
+ if (arc)
+ {
+ FbGCPrivPtr pPriv = fbGetGCPrivate (pGC);
+ FbBits *dst;
+ FbStride dstStride;
+ int dstBpp;
+ int dstXoff, dstYoff;
+ BoxRec box;
+ int x2, y2;
+ RegionPtr cclip;
+ int wrapped = 0;
+
+ cclip = fbGetCompositeClip (pGC);
+ fbGetDrawable (pDrawable, dst, dstStride, dstBpp, dstXoff, dstYoff);
+#ifdef FB_ACCESS_WRAPPER
+ wrapped = 1;
+#else
+ wrapped = 0;
+#endif
+ while (narcs--)
+ {
+ if (miCanZeroArc (parcs))
+ {
+ box.x1 = parcs->x + pDrawable->x;
+ box.y1 = parcs->y + pDrawable->y;
+ /*
+ * Because box.x2 and box.y2 get truncated to 16 bits, and the
+ * RECT_IN_REGION test treats the resulting number as a signed
+ * integer, the RECT_IN_REGION test alone can go the wrong way.
+ * This can result in a server crash because the rendering
+ * routines in this file deal directly with cpu addresses
+ * of pixels to be stored, and do not clip or otherwise check
+ * that all such addresses are within their respective pixmaps.
+ * So we only allow the RECT_IN_REGION test to be used for
+ * values that can be expressed correctly in a signed short.
+ */
+ x2 = box.x1 + (int)parcs->width + 1;
+ box.x2 = x2;
+ y2 = box.y1 + (int)parcs->height + 1;
+ box.y2 = y2;
+ if ( (x2 <= SHRT_MAX) && (y2 <= SHRT_MAX) &&
+ (RegionContainsRect(cclip, &box) == rgnIN) ) {
+#ifdef FB_ACCESS_WRAPPER
+ if (!wrapped) {
+ fbPrepareAccess (pDrawable);
+ wrapped = 1;
+ }
+#endif
+ (*arc) (dst, dstStride, dstBpp,
+ parcs, pDrawable->x + dstXoff, pDrawable->y + dstYoff,
+ pPriv->and, pPriv->xor);
+ } else {
+#ifdef FB_ACCESS_WRAPPER
+ if (wrapped) {
+ fbFinishAccess (pDrawable);
+ wrapped = 0;
+ }
+#endif
+ miZeroPolyArc(pDrawable, pGC, 1, parcs);
+ }
+ }
+ else {
+#ifdef FB_ACCESS_WRAPPER
+ if (wrapped) {
+ fbFinishAccess (pDrawable);
+ wrapped = 0;
+ }
+#endif
+ miPolyArc(pDrawable, pGC, 1, parcs);
+ }
+ parcs++;
+ }
+#ifdef FB_ACCESS_WRAPPER
+ if (wrapped) {
+ fbFinishAccess (pDrawable);
+ wrapped = 0;
+ }
+#endif
+ }
+ else
+ miZeroPolyArc (pDrawable, pGC, narcs, parcs);
+ }
+ else
+ miPolyArc (pDrawable, pGC, narcs, parcs);
+}
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