Merge pull request #281 from polluks/sp65

[cc65] / src / sp65 / palette.c

diff --git a/src/sp65/palette.c b/src/sp65/palette.c
index f113d967037a2c022bbb808749a788b664a447a5..333843af0a92bd179e73761ba3ac609dd393deb7 100644 (file)
--- a/src/sp65/palette.c
+++ b/src/sp65/palette.c
@@ -33,6 +33,8 @@
 
 
 
+#include <string.h>
+
 /* common */
 #include "check.h"
 #include "xmalloc.h"
@@ -68,7 +70,7 @@ Palette* NewPalette (unsigned Entries)
 
 Palette* NewMonochromePalette (void)
 /* Create and return a palette with two entries (black and white) */
-{                               
+{
     /* Create a new palette */
     Palette* P = NewPalette (2);
 
@@ -82,6 +84,29 @@ Palette* NewMonochromePalette (void)
 
 
 
+Palette* DupPalette (const Palette* P)
+/* Create a copy of a palette */
+{
+    Palette* N;
+
+
+    /* Allow to pass a NULL palette */
+    if (P == 0) {
+        return 0;
+    }
+
+    /* Create a new palette */
+    N = NewPalette (P->Count);
+
+    /* Copy the palette data */
+    memcpy (N->Entries, P->Entries, P->Count * sizeof (P->Entries[0]));
+
+    /* Return the copy */
+    return N;
+}
+
+
+
 void FreePalette (Palette* P)
 /* Free a dynamically allocated palette */
 {
@@ -90,3 +115,26 @@ void FreePalette (Palette* P)
 
 
 
+void DumpPalette (FILE* F, const Palette* P)
+/* Dump the palette in readable form to the given file */
+{
+    unsigned I;
+
+    fputs ("Entry     R      G      B      A     Combined\n", F);
+    fputs ("----------------------------------------------\n", F);
+    for (I = 0; I < P->Count; ++I) {
+
+        /* Get the color entry */
+        const Color* C = P->Entries + I;
+
+        /* Output it */
+        fprintf (F,
+                 " %3u    %3u    %3u    %3u    %3u    #%08lX\n",
+                 I,
+                 C->R, C->G, C->B, C->A,
+                 (((unsigned long) C->A) << 24) |
+                 (((unsigned long) C->B) << 16) |
+                 (((unsigned long) C->G) <<  8) |
+                 (((unsigned long) C->R) <<  0));
+    }
+}