bslathi19/cc65
1
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

Add palette extraction functions

Browse Source
This commit is contained in:
karri
2022-12-30 14:44:18 +02:00
parent ebd1381030
commit 4117e94ed5
5 changed files with 391 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

104
src/sp65/palconv.c Normal file
View File

@@ -0,0 +1,104 @@
/*****************************************************************************/
/* */
/* palconv.c */
/* */
/* Color palette conversions for the sp65 sprite and bitmap utility */
/* */
/* */
/* */
/* (C) 2022, Karri Kaksonen */
/* */
/* */
/* This software is provided 'as-is', without any expressed or implied */
/* warranty. In no event will the authors be held liable for any damages */
/* arising from the use of this software. */
/* */
/* Permission is granted to anyone to use this software for any purpose, */
/* including commercial applications, and to alter it and redistribute it */
/* freely, subject to the following restrictions: */
/* */
/* 1. The origin of this software must not be misrepresented; you must not */
/* claim that you wrote the original software. If you use this software */
/* in a product, an acknowledgment in the product documentation would be */
/* appreciated but is not required. */
/* 2. Altered source versions must be plainly marked as such, and must not */
/* be misrepresented as being the original software. */
/* 3. This notice may not be removed or altered from any source */
/* distribution. */
/* */
/*****************************************************************************/
#include <string.h>
#include <stdlib.h>
/* common */
#include "check.h"
#include "xmalloc.h"
/* sp65 */
#include "attr.h"
#include "error.h"
#include "palette.h"
#include "lynxpalette.h"
/*****************************************************************************/
/* Data */
/*****************************************************************************/
/* Type of the entry in the palette table */
typedef struct PaletteMapEntry PaletteMapEntry;
struct PaletteMapEntry {
const char* Format;
StrBuf* (*PaletteFunc) (const Bitmap*, const Collection*);
};
/* Converter table, alphabetically sorted */
static const PaletteMapEntry PaletteMap[] = {
{ "lynx-palette", GenLynxPalette },
};
/*****************************************************************************/
/* Code */
/*****************************************************************************/
static int Compare (const void* Key, const void* MapEntry)
/* Compare function for bsearch */
{
return strcmp (Key, ((const PaletteMapEntry*) MapEntry)->Format);
}
StrBuf* PaletteTo (const Bitmap* B, const Collection* A)
/* Convert the palette of bitmap B into some sort of other binary format.
** The output is stored in a string buffer (which is actually a dynamic
** char array) and returned. The actual output format is taken from the
** "format" attribute in the attribute collection A.
*/
{
const PaletteMapEntry* E;
/* Get the format to convert to */
const char* Format = NeedAttrVal (A, "target", "palette");
/* Search for the matching converter */
E = bsearch (Format,
PaletteMap,
sizeof (PaletteMap) / sizeof (PaletteMap[0]),
sizeof (PaletteMap[0]),
Compare);
if (E == 0) {
Error ("No such target format: '%s'", Format);
}
/* Do the conversion */
return E->PaletteFunc (B, A);
}