the great code shaking party

2022-06-26 12:22:12 +02:00
parent ecd0186b28
commit 75a06cf5b4
102 changed files with 65 additions and 0 deletions
@@ -0,0 +1,119 @@
+/*
+			calcluts.c
+			----------
+
+   voir aussi: luts15bits.c
+
+*/
+
+#include  <stdio.h>
+#include  <stdlib.h>
+#include  <string.h>
+
+#ifdef NEED_ALLOCA_H
+#include  <alloca.h> 
+#endif
+
+#include  "tthimage.h"
+
+/*::------------------------------------------------------------------::*/
+int
+Image_calclut_lin(int *lut, int v0, int v255)
+{
+int foo, quux, delta;
+
+#if DEBUG_LEVEL
+fprintf(stderr, "calclut lin: v0 = %d  v255 = %d\n", v0, v255);
+#endif
+
+delta = v255 - v0;
+if (delta == 0)
+	{
+	return DIVISOR_IS_0;
+	}
+
+#if DEBUG_LEVEL
+fprintf(stderr, "calclut lin: delta = %d\n", delta);
+#endif
+
+for (foo=0; foo<256; foo++)
+	{
+	quux = (foo * delta / 255) + v0;
+#if DEBUG_LEVEL
+	printf("lut(%d) = %d\n", foo, quux);
+#endif
+	lut[foo] = quux;
+	}
+
+return FUNC_IS_ALPHA;
+}
+/*::------------------------------------------------------------------::*/
+int
+Image_calclut_foo(int *lut, int v0, int v255)
+{
+fprintf(stderr, "%s ( %p %d %d )\n", __func__, lut, v0, v255);
+
+return FUNC_IS_ALPHA;
+}
+/*::------------------------------------------------------------------::*/
+int
+Image_print_lut(int *lut, char *fname, int flag)
+{
+FILE	*fp;
+int	foo;
+
+if (strcmp(fname, "-"))
+	fp = fopen(fname, "w");
+else
+	fp = stdout;
+
+for (foo=0; foo<256; foo++)
+	{
+	if (flag)
+		printf("%d ", foo);
+	printf("%d\n", lut[foo]);
+	}
+
+if (fp!=stdout)
+	fclose(fp);
+
+return FUNC_IS_ALPHA;
+}
+/*::------------------------------------------------------------------::*/
+int
+Image_load_lut(int *lut, char *fname, int flag)
+{
+FILE	*fp;
+int	value, foo, idx;
+
+if (flag) {
+	fprintf(stderr, "in %s, flag must be O, was %d\n", __func__, flag);
+	return WRONG_FLAG;
+	}
+
+#if DEBUG_LEVEL
+fprintf(stderr, "load_lut %s in %p\n", fname, lut);
+#endif
+
+if (NULL==(fp=fopen(fname, "r")))
+	{
+	fprintf(stderr, "%s can't fopen %s\n", __func__, fname);
+	return 666;
+	}
+
+/* WARNING : very crude code here (4 nov 1999) */
+for (idx=0; idx<256; idx++)
+	{
+	foo = fscanf(fp, "%d", &value);
+#if DEBUG_LEVEL
+	fprintf(stderr, "load lut %3d %3d %d\n", idx, foo, value);
+#endif
+	if (1==foo)	lut[idx] = value;
+	else		lut[idx] = -1;
+	}
+
+fclose(fp);
+
+return FUNC_IS_ALPHA;
+}
+/*::------------------------------------------------------------------::*/