1/*****************************************************************************/
2/* */
3/* koala.c */
4/* */
5/* Koala format backend 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/* common */
37#include "attrib.h"
38
39/* sp65 */
40#include "error.h"
41#include "koala.h"
42
43
44
45/*****************************************************************************/
46/* Data */
47/*****************************************************************************/
48
49
50
51/* Screen size of a koala picture */
52#define WIDTH 160U
53#define HEIGHT 200U
54
55
56
57/*****************************************************************************/
58/* Code */
59/*****************************************************************************/
60
61
62
63StrBuf* GenKoala (const Bitmap* B, const Collection* A attribute ((unused)))
64/* Generate binary output in koala format for the bitmap B. The output is
65** stored in a string buffer (which is actually a dynamic char array) and
66** returned.
67*/
68{
69 StrBuf* D;
70 unsigned char Screen[160][200];
71 unsigned char X, Y;
72
73 /* Koala pictures are always 160x200 in size with 16 colors */
74 if (!BitmapIsIndexed (B) ||
75 GetBitmapColors (B) > 16 ||
76 GetBitmapHeight (B) != HEIGHT ||
77 GetBitmapWidth (B) != WIDTH) {
78
79 Error ("Bitmaps converted to koala format must be in indexed mode "
80 "with 16 colors max and a size of %ux%u", WIDTH, HEIGHT);
81 }
82
83 /* Read the image into Screen */
84 for (Y = 0; Y < HEIGHT; ++Y) {
85 for (X = 0; X < WIDTH; ++X) {
86 Screen[X][Y] = (unsigned char) GetPixel (B, X, Y).Index;
87 }
88 }
89
90 /* Create the output buffer and resize it to the required size. */
91 D = NewStrBuf ();
92 SB_Realloc (D, 10003);
93
94 /* Add $4400 as load address */
95 SB_AppendChar (D, 0x00);
96 SB_AppendChar (D, 0x44);
97
98 /* TODO: The actual work ;-) */
99 (void) Screen;
100
101 /* Return the converted bitmap */
102 return D;
103}
104