mirror of https://github.com/cc65/cc65.git
105 lines
4.3 KiB
C
105 lines
4.3 KiB
C
/*****************************************************************************/
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/* */
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/* palconv.c */
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/* */
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/* Color palette conversions for the sp65 sprite and bitmap utility */
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/* */
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/* */
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/* */
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/* (C) 2022, Karri Kaksonen */
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/* */
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/* */
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/* This software is provided 'as-is', without any expressed or implied */
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/* warranty. In no event will the authors be held liable for any damages */
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/* arising from the use of this software. */
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/* */
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/* Permission is granted to anyone to use this software for any purpose, */
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/* including commercial applications, and to alter it and redistribute it */
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/* freely, subject to the following restrictions: */
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/* */
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/* 1. The origin of this software must not be misrepresented; you must not */
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/* claim that you wrote the original software. If you use this software */
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/* in a product, an acknowledgment in the product documentation would be */
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/* appreciated but is not required. */
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/* 2. Altered source versions must be plainly marked as such, and must not */
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/* be misrepresented as being the original software. */
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/* 3. This notice may not be removed or altered from any source */
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/* distribution. */
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/* */
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/*****************************************************************************/
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#include <string.h>
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#include <stdlib.h>
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/* common */
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#include "check.h"
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#include "xmalloc.h"
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/* sp65 */
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#include "attr.h"
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#include "error.h"
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#include "palette.h"
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#include "lynxpalette.h"
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/*****************************************************************************/
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/* Data */
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/*****************************************************************************/
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/* Type of the entry in the palette table */
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typedef struct PaletteMapEntry PaletteMapEntry;
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struct PaletteMapEntry {
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const char* Format;
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StrBuf* (*PaletteFunc) (const Bitmap*, const Collection*);
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};
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/* Converter table, alphabetically sorted */
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static const PaletteMapEntry PaletteMap[] = {
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{ "lynx-palette", GenLynxPalette },
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};
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/*****************************************************************************/
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/* Code */
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/*****************************************************************************/
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static int Compare (const void* Key, const void* MapEntry)
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/* Compare function for bsearch */
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{
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return strcmp (Key, ((const PaletteMapEntry*) MapEntry)->Format);
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}
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StrBuf* PaletteTo (const Bitmap* B, const Collection* A)
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/* Convert the palette of bitmap B into some sort of other binary format.
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** The output is stored in a string buffer (which is actually a dynamic
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** char array) and returned. The actual output format is taken from the
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** "format" attribute in the attribute collection A.
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*/
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{
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const PaletteMapEntry* E;
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/* Get the format to convert to */
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const char* Format = NeedAttrVal (A, "target", "palette");
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/* Search for the matching converter */
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E = bsearch (Format,
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PaletteMap,
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sizeof (PaletteMap) / sizeof (PaletteMap[0]),
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sizeof (PaletteMap[0]),
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Compare);
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if (E == 0) {
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Error ("No such target format: '%s'", Format);
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}
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/* Do the conversion */
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return E->PaletteFunc (B, A);
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}
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