1 /*****************************************************************************/
5 /* VICII sprite format backend for the sp65 sprite and bitmap utility */
9 /* (C) 2012, Ullrich von Bassewitz */
10 /* Roemerstrasse 52 */
11 /* D-70794 Filderstadt */
12 /* EMail: uz@cc65.org */
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. */
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: */
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 */
32 /*****************************************************************************/
41 #include "vic2sprite.h"
45 /*****************************************************************************/
47 /*****************************************************************************/
51 /* Screen size of a koala picture */
57 /*****************************************************************************/
59 /*****************************************************************************/
63 StrBuf* GenVic2Sprite (const Bitmap* B, const Collection* A attribute ((unused)))
64 /* Generate binary output in VICII sprite format for the bitmap B. The output
65 * is stored in a string buffer (which is actually a dynamic char array) and
72 /* Sprites pictures are always 24x21 in size with 2 colors */
73 if (GetBitmapType (B) != bmIndexed ||
74 GetBitmapColors (B) != 2 ||
75 GetBitmapHeight (B) != HEIGHT ||
76 GetBitmapWidth (B) != WIDTH) {
78 Error ("Bitmaps converted to vic2 sprite format must be in indexed "
79 "mode with 2 colors max and a size of %ux%u", WIDTH, HEIGHT);
82 /* Create the output buffer and resize it to the required size. */
86 /* Convert the image */
87 for (Y = 0; Y < HEIGHT; ++Y) {
89 for (X = 0; X < WIDTH; ++X) {
91 /* Fetch next bit into byte buffer */
92 V = (V << 1) | (GetPixel (B, X, Y).Index != 0);
94 /* Store full bytes into the output buffer */
95 if ((X & 0x07) == 0x07) {
102 /* Return the converted bitmap */