Added libksquirrel for KDE3

git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/libraries/libksquirrel@1095624 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 189 insertions, 0 deletions

diff --git a/kernel/kls_ljpeg/ljpeg2ppm/predictor.c b/kernel/kls_ljpeg/ljpeg2ppm/predictor.c
new file mode 100644
index 0000000..36dedfd
--- /dev/null
+++ b/kernel/kls_ljpeg/ljpeg2ppm/predictor.c
@@ -0,0 +1,189 @@
+/*
+ * predictor.c --
+ * 
+ * Code for predictor calculation. Its macro version, predictor.h,
+ * is used in non-debugging compilation.
+ *
+ * Copyright (c) 1994 Kongji Huang and Brian C. Smith.
+ * Cornell University
+ * All rights reserved.
+ * 
+ * Permission to use, copy, modify, and distribute this software and its
+ * documentation for any purpose, without fee, and without written agreement is
+ * hereby granted, provided that the above copyright notice and the following
+ * two paragraphs appear in all copies of this software.
+ * 
+ * IN NO EVENT SHALL CORNELL UNIVERSITY BE LIABLE TO ANY PARTY FOR
+ * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
+ * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF CORNELL
+ * UNIVERSITY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ * CORNELL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND CORNELL UNIVERSITY HAS NO OBLIGATION TO
+ * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+ */
+
+#include <stdio.h>
+#include "mcu.h"
+
+#ifdef DEBUG
+/*
+ *--------------------------------------------------------------
+ *
+ * Predict --
+ *
+ *      Calculate the predictor for pixel[row][col][curComp],
+ *	i.e. curRowBuf[col][curComp]. It handles the all special 
+ *	cases at image edges, such as first row and first column
+ *	of a scan.
+ *
+ * Results:
+ *      predictor is passed out.
+ *
+ * Side effects:
+ *      None.
+ *
+ *--------------------------------------------------------------
+ */
+void
+Predict(row,col,curComp,curRowBuf,prevRowBuf,Pr,Pt,psv,predictor)
+    int row,col;		/* position of the pixel to be predicted */
+    int curComp;		/* the pixel's component that is predicting */
+    MCU *curRowBuf,*prevRowBuf;	/* current and previous row of image */
+    int Pr;			/* data precision */
+    int Pt;		 	/* point transformation */
+    int psv;			/* predictor selection value */
+    int *predictor;		/* preditor value (output) */
+{
+    register int left,upper,diag,leftcol;
+
+    leftcol=col-1;
+    if (row==0) {      
+
+       /* 
+        * The predictor of first pixel is (1<<(Pr-Pt-1), and the
+        * predictors for rest of first row are left neighbors. 
+        */
+       if (col==0) {
+          *predictor = (1<<(Pr-Pt-1));
+       }
+       else {
+          *predictor = curRowBuf[leftcol][curComp];
+       }
+    }
+    else {
+
+       /*
+        * The predictors of first column are upper neighbors. 
+        * All other preditors are calculated according to psv. 
+        */
+       upper=prevRowBuf[col][curComp];
+       if (col==0)
+          *predictor = upper;
+       else {
+          left=curRowBuf[leftcol][curComp];
+          diag=prevRowBuf[leftcol][curComp];
+          switch (psv) {
+             case 0:
+                     *predictor = 0;
+                     break;
+             case 1:
+                     *predictor = left;
+                     break;
+             case 2:
+                     *predictor = upper;
+                     break;
+             case 3:
+                     *predictor = diag;
+                     break;
+             case 4:
+                     *predictor = left+upper-diag;
+                     break;
+             case 5:
+                     *predictor = left+((upper-diag)>>1);
+                     break;
+             case 6:
+                     *predictor = upper+((left-diag)>>1);
+                     break;
+             case 7:
+                     *predictor = (left+upper)>>1;
+                     break;
+             default:
+                     fprintf(stderr,"Warning: Undefined PSV\n");
+                     *predictor = 0;
+           }
+        }
+      }
+}
+
+/*
+ *--------------------------------------------------------------
+ *
+ * QuickPredict --
+ *
+ *      Calculate the predictor for sample curRowBuf[col][curComp].
+ *	It does not handle the special cases at image edges, such 
+ *      as first row and first column of a scan. We put the special 
+ *	case checkings outside so that the computations in main
+ *	loop can be simpler. This has enhenced the performance
+ *	significantly.
+ *
+ * Results:
+ *      predictor is passed out.
+ *
+ * Side effects:
+ *      None.
+ *
+ *--------------------------------------------------------------
+ */
+void
+QuickPredict(col,curComp,curRowBuf,prevRowBuf,psv,predictor)
+    int col;			/* column # of the pixel to be predicted */
+    int curComp;		/* the pixel's component that is predicting */
+    MCU *curRowBuf,*prevRowBuf;	/* current and previous row of image */
+    int psv;			/* predictor selection value */
+    int *predictor;		/* preditor value (output) */
+{
+    register int left,upper,diag,leftcol;
+
+    leftcol=col-1;
+    upper=prevRowBuf[col][curComp];
+    left=curRowBuf[leftcol][curComp];
+    diag=prevRowBuf[leftcol][curComp];
+
+    /* 
+     * All predictor are calculated according to psv.
+     */ 
+    switch (psv) {
+      case 0:
+              *predictor = 0;
+              break;
+      case 1:
+              *predictor = left;
+              break;
+      case 2:
+              *predictor = upper;
+              break;
+      case 3:
+              *predictor = diag;
+              break;
+      case 4:
+              *predictor = left+upper-diag;
+              break;
+      case 5:
+              *predictor = left+((upper-diag)>>1);
+              break;
+      case 6:
+              *predictor = upper+((left-diag)>>1);
+              break;
+      case 7:
+              *predictor = (left+upper)>>1;
+              break;
+      default:
+              fprintf(stderr,"Warning: Undefined PSV\n");
+              *predictor = 0;
+     }
+}
+#endif /*DEBUG*/