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141 lines
4.8 KiB
C
141 lines
4.8 KiB
C
/*****************************************************************************/
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/* */
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/* palette.c */
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/* */
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/* Color palette definition for the sp65 sprite and bitmap utility */
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/* */
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/* */
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/* */
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/* (C) 2012, Ullrich von Bassewitz */
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/* Roemerstrasse 52 */
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/* D-70794 Filderstadt */
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/* EMail: uz@cc65.org */
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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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/* 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 "palette.h"
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/*****************************************************************************/
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/* Code */
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/*****************************************************************************/
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Palette* NewPalette (unsigned Entries)
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/* Create a new palette with the given number of entries */
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{
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Palette* P;
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/* Some safety checks */
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PRECONDITION (Entries > 0 && Entries <= 256);
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/* Allocate memory */
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P = xmalloc (sizeof (*P) + (Entries - 1) * sizeof (P->Entries[0]));
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/* Initialize the struct, then return it */
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P->Count = Entries;
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return P;
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}
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Palette* NewMonochromePalette (void)
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/* Create and return a palette with two entries (black and white) */
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{
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/* Create a new palette */
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Palette* P = NewPalette (2);
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/* Set the two colors */
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P->Entries[0] = RGBA (0x00, 0x00, 0x00, 0x00);
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P->Entries[1] = RGBA (0xFF, 0xFF, 0xFF, 0x00);
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/* Return the new palette */
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return P;
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}
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Palette* DupPalette (const Palette* P)
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/* Create a copy of a palette */
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{
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Palette* N;
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/* Allow to pass a NULL palette */
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if (P == 0) {
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return 0;
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}
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/* Create a new palette */
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N = NewPalette (P->Count);
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/* Copy the palette data */
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memcpy (N->Entries, P->Entries, P->Count * sizeof (P->Entries[0]));
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/* Return the copy */
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return N;
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}
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void FreePalette (Palette* P)
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/* Free a dynamically allocated palette */
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{
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xfree (P);
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}
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void DumpPalette (FILE* F, const Palette* P)
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/* Dump the palette in readable form to the given file */
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{
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unsigned I;
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fputs ("Entry R G B A Combined\n", F);
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fputs ("----------------------------------------------\n", F);
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for (I = 0; I < P->Count; ++I) {
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/* Get the color entry */
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const Color* C = P->Entries + I;
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/* Output it */
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fprintf (F,
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" %3u %3u %3u %3u %3u #%08lX\n",
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I,
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C->R, C->G, C->B, C->A,
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(((unsigned long) C->A) << 24) |
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(((unsigned long) C->B) << 16) |
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(((unsigned long) C->G) << 8) |
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(((unsigned long) C->R) << 0));
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}
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}
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