Initial revision

1 files changed, 182 insertions, 0 deletions

diff --git a/miext/shadow/shrotpack.h b/miext/shadow/shrotpack.h
new file mode 100644
index 000000000..ce9b4c561
--- /dev/null
+++ b/miext/shadow/shrotpack.h
@@ -0,0 +1,182 @@
+/*
+ * $XFree86: xc/programs/Xserver/miext/shadow/shrotpack.h,v 1.4 2001/10/28 03:34:16 tsi Exp $
+ *
+ * Copyright © 2000 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.
+ */
+
+/*
+ * Thanks to Daniel Chemko <dchemko@intrinsyc.com> for making the 90 and 180
+ * orientations work.
+ */
+
+#include    "X.h"
+#include    "scrnintstr.h"
+#include    "windowstr.h"
+#include    "font.h"
+#include    "dixfontstr.h"
+#include    "fontstruct.h"
+#include    "mi.h"
+#include    "regionstr.h"
+#include    "globals.h"
+#include    "gcstruct.h"
+#include    "shadow.h"
+#include    "fb.h"
+
+#define DANDEBUG         0
+
+#if ROTATE == 270
+
+#define SCRLEFT(x,y,w,h)    (pScreen->height - ((y) + (h)))
+#define SCRY(x,y,w,h)	    (x)
+#define SCRWIDTH(x,y,w,h)   (h)
+#define FIRSTSHA(x,y,w,h)   (((y) + (h) - 1) * shaStride + (x))
+#define STEPDOWN(x,y,w,h)   ((w)--)
+#define NEXTY(x,y,w,h)	    ((x)++)
+#define SHASTEPX(stride)    -(stride)
+#define SHASTEPY(stride)    (1)
+
+#elif ROTATE == 90
+
+#define SCRLEFT(x,y,w,h)    (y)
+#define SCRY(x,y,w,h)	    (pScreen->width - ((x) + (w)) - 1)
+#define SCRWIDTH(x,y,w,h)   (h)
+#define FIRSTSHA(x,y,w,h)   ((y) * shaStride + (x + w - 1))
+#define STEPDOWN(x,y,w,h)   ((w)--)
+#define NEXTY(x,y,w,h)	    ((void)(x))
+#define SHASTEPX(stride)    (stride)
+#define SHASTEPY(stride)    (-1)
+
+#elif ROTATE == 180
+
+#define SCRLEFT(x,y,w,h)    (pScreen->width - ((x) + (w)))
+#define SCRY(x,y,w,h)	    (pScreen->height - ((y) + (h)) - 1)
+#define SCRWIDTH(x,y,w,h)   (w)
+#define FIRSTSHA(x,y,w,h)   ((y + h - 1) * shaStride + (x + w - 1))
+#define STEPDOWN(x,y,w,h)   ((h)--)
+#define NEXTY(x,y,w,h)	    ((void)(y))
+#define SHASTEPX(stride)    (-1)
+#define SHASTEPY(stride)    -(stride)
+
+#else
+
+#define SCRLEFT(x,y,w,h)    (x)
+#define SCRY(x,y,w,h)	    (y)
+#define SCRWIDTH(x,y,w,h)   (w)
+#define FIRSTSHA(x,y,w,h)   ((y) * shaStride + (x))
+#define STEPDOWN(x,y,w,h)   ((h)--)
+#define NEXTY(x,y,w,h)	    ((y)++)
+#define SHASTEPX(stride)    (1)
+#define SHASTEPY(stride)    (stride)
+
+#endif
+
+void
+FUNC (ScreenPtr	    pScreen,
+      shadowBufPtr  pBuf)
+{
+    RegionPtr	damage = &pBuf->damage;
+    PixmapPtr	pShadow = pBuf->pPixmap;
+    int		nbox = REGION_NUM_RECTS (damage);
+    BoxPtr	pbox = REGION_RECTS (damage);
+    FbBits	*shaBits;
+    Data	*shaBase, *shaLine, *sha;
+    FbStride	shaStride;
+    int		scrBase, scrLine, scr;
+    int		shaBpp;
+    int		shaXoff, shaYoff;   /* XXX assumed to be zero */
+    int		x, y, w, h, width;
+    int         i;
+    Data	*winBase = NULL, *win;
+    CARD32	winSize;
+
+    fbGetDrawable (&pShadow->drawable, shaBits, shaStride, shaBpp, shaXoff, shaYoff);
+    shaBase = (Data *) shaBits;
+    shaStride = shaStride * sizeof (FbBits) / sizeof (Data);
+#if (DANDEBUG > 1)
+    ErrorF ("-> Entering Shadow Update:\r\n   |- Origins: pShadow=%x, pScreen=%x, damage=%x\r\n   |- Metrics: shaStride=%d, shaBase=%x, shaBpp=%d\r\n   |                                                     \n", pShadow, pScreen, damage, shaStride, shaBase, shaBpp);
+#endif
+    while (nbox--)
+    {
+        x = pbox->x1;
+        y = pbox->y1;
+        w = (pbox->x2 - pbox->x1);
+        h = pbox->y2 - pbox->y1;
+        
+#if (DANDEBUG > 2)
+        ErrorF ("   |-> Redrawing box - Metrics: X=%d, Y=%d, Width=%d, Height=%d\n", x, y, w, h);
+#endif
+        scrLine = SCRLEFT(x,y,w,h);
+        shaLine = shaBase + FIRSTSHA(x,y,w,h);
+        
+        while (STEPDOWN(x,y,w,h))
+        {
+            winSize = 0;
+            scrBase = 0;
+            width = SCRWIDTH(x,y,w,h);
+            scr = scrLine;
+            sha = shaLine;
+#if (DANDEBUG > 3)
+            ErrorF ("   |   |-> StepDown - Metrics: width=%d, scr=%x, sha=%x\n", width, scr, sha);
+#endif
+            while (width)
+            {
+                /*  how much remains in this window */
+                i = scrBase + winSize - scr;
+                if (i <= 0 || scr < scrBase)
+                {
+                    winBase = (Data *) (*pBuf->window) (pScreen,
+							SCRY(x,y,w,h),
+							scr * sizeof (Data),
+							SHADOW_WINDOW_WRITE,
+							&winSize,
+							pBuf->closure);
+                    if(!winBase)
+                        return;
+                    scrBase = scr;
+                    winSize /= sizeof (Data);
+                    i = winSize;
+#if(DANDEBUG > 4)
+                    ErrorF ("   |   |   |-> Starting New Line - Metrics: winBase=%x, scrBase=%x, winSize=%d\r\n   |   |   |   Xstride=%d, Ystride=%d, w=%d h=%d\n", winBase, scrBase, winSize, SHASTEPX(shaStride), SHASTEPY(shaStride), w, h);
+#endif
+                }
+                win = winBase + (scr - scrBase);
+                if (i > width)
+                    i = width;
+                width -= i;
+                scr += i;
+#if(DANDEBUG > 5)
+		ErrorF ("   |   |   |-> Writing Line - Metrics: win=%x, sha=%x\n", win, sha);
+#endif
+                while (i--)
+                {
+#if(DANDEBUG > 6)
+		    ErrorF ("   |   |   |-> Writing Pixel - Metrics: win=%x, sha=%d, remaining=%d\n", win, sha, i);
+#endif
+                    *win++ = *sha;
+                    sha += SHASTEPX(shaStride);
+                } /*  i */
+            } /*  width */
+            shaLine += SHASTEPY(shaStride);
+            NEXTY(x,y,w,h);
+        } /*  STEPDOWN */
+        pbox++;
+    } /*  nbox */
+}