mirror of https://github.com/cc65/cc65.git
94 lines
3.8 KiB
C
94 lines
3.8 KiB
C
/*****************************************************************************/
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/* */
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/* lynxpalette.c */
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/* */
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/* Lynx palette backend 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 <stdlib.h>
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/* common */
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#include "attrib.h"
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#include "print.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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/*****************************************************************************/
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/* Code */
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/*****************************************************************************/
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StrBuf* GenLynxPalette (const Bitmap* B, const Collection* A)
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/* Generate binary output in Lynx palette format for the bitmap B. The output
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** is stored in a string buffer (which is actually a dynamic char array) and
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** returned.
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**
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*/
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{
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StrBuf* D;
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const Palette* P = GetBitmapPalette (B);
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const char* Format = GetAttrVal(A, "format");
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unsigned I;
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if (Format == 0) {
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/* No format specified */
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}
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D = NewStrBuf ();
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for (I = 0; I < 16; ++I) {
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/* Get the color entry */
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const Color* C = P->Entries + I;
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/* Add the green component */
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SB_AppendChar (D, C->G >> 4);
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}
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for (I = 0; I < 16; ++I) {
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/* Get the color entry */
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const Color* C = P->Entries + I;
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/* Add the blue,red component */
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SB_AppendChar (D, (C->B & 0xF0) | (C->R >> 4));
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}
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/* Return the converted palette */
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return D;
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}
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