1/*****************************************************************************/
2/* */
3/* palette.c */
4/* */
5/* Color palette definition for the sp65 sprite and bitmap utility */
6/* */
7/* */
8/* */
9/* (C) 2012, Ullrich von Bassewitz */
10/* Roemerstrasse 52 */
11/* D-70794 Filderstadt */
12/* EMail: uz@cc65.org */
13/* */
14/* */
15/* This software is provided 'as-is', without any expressed or implied */
16/* warranty. In no event will the authors be held liable for any damages */
17/* arising from the use of this software. */
18/* */
19/* Permission is granted to anyone to use this software for any purpose, */
20/* including commercial applications, and to alter it and redistribute it */
21/* freely, subject to the following restrictions: */
22/* */
23/* 1. The origin of this software must not be misrepresented; you must not */
24/* claim that you wrote the original software. If you use this software */
25/* in a product, an acknowledgment in the product documentation would be */
26/* appreciated but is not required. */
27/* 2. Altered source versions must be plainly marked as such, and must not */
28/* be misrepresented as being the original software. */
29/* 3. This notice may not be removed or altered from any source */
30/* distribution. */
31/* */
32/*****************************************************************************/
33
34
35
36#include <string.h>
37
38/* common */
39#include "check.h"
40#include "xmalloc.h"
41
42/* sp65 */
43#include "palette.h"
44
45
46
47/*****************************************************************************/
48/* Code */
49/*****************************************************************************/
50
51
52
53Palette* NewPalette (unsigned Entries)
54/* Create a new palette with the given number of entries */
55{
56 Palette* P;
57
58 /* Some safety checks */
59 PRECONDITION (Entries > 0 && Entries <= 256);
60
61 /* Allocate memory */
62 P = xmalloc (sizeof (*P) + (Entries - 1) * sizeof (P->Entries[0]));
63
64 /* Initialize the struct, then return it */
65 P->Count = Entries;
66 return P;
67}
68
69
70
71Palette* NewMonochromePalette (void)
72/* Create and return a palette with two entries (black and white) */
73{
74 /* Create a new palette */
75 Palette* P = NewPalette (2);
76
77 /* Set the two colors */
78 P->Entries[0] = RGBA (0x00, 0x00, 0x00, 0x00);
79 P->Entries[1] = RGBA (0xFF, 0xFF, 0xFF, 0x00);
80
81 /* Return the new palette */
82 return P;
83}
84
85
86
87Palette* DupPalette (const Palette* P)
88/* Create a copy of a palette */
89{
90 Palette* N;
91
92
93 /* Allow to pass a NULL palette */
94 if (P == 0) {
95 return 0;
96 }
97
98 /* Create a new palette */
99 N = NewPalette (P->Count);
100
101 /* Copy the palette data */
102 memcpy (N->Entries, P->Entries, P->Count * sizeof (P->Entries[0]));
103
104 /* Return the copy */
105 return N;
106}
107
108
109
110void FreePalette (Palette* P)
111/* Free a dynamically allocated palette */
112{
113 xfree (P);
114}
115
116
117
118void DumpPalette (FILE* F, const Palette* P)
119/* Dump the palette in readable form to the given file */
120{
121 unsigned I;
122
123 fputs ("Entry R G B A Combined\n", F);
124 fputs ("----------------------------------------------\n", F);
125 for (I = 0; I < P->Count; ++I) {
126
127 /* Get the color entry */
128 const Color* C = P->Entries + I;
129
130 /* Output it */
131 fprintf (F,
132 " %3u %3u %3u %3u %3u #%08lX\n",
133 I,
134 C->R, C->G, C->B, C->A,
135 (((unsigned long) C->A) << 24) |
136 (((unsigned long) C->B) << 16) |
137 (((unsigned long) C->G) << 8) |
138 (((unsigned long) C->R) << 0));
139 }
140}
141