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ST formats : only save ST palette when RGB scale is 8

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This commit is contained in:
Thomas Bernard 2020-05-25 22:00:22 +02:00
parent f9b6e40f36
commit 81595172a1
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GPG Key ID: 0FF11B67A5C0863C
1 changed files with 14 additions and 4 deletions
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18
src/stformats.c
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@ -33,6 +33,7 @@
#include "loadsavefuncs.h"
#include "io.h"
#include "misc.h"
#include "palette.h"
#include "gfx2log.h"
#include "gfx2mem.h"
#include "packbits.h"
@ -187,7 +188,10 @@ void PI1_code_palette(const T_Components * palette, byte * dest)
{
int i; // Numéro de la couleur traitée
word w; // Word contenant le code
int plain_ST_colors = Get_palette_RGB_scale() == 8;
GFX2_Log(GFX2_DEBUG, "encoding ST%s palette (%d bits per component)\n",
plain_ST_colors ? "" : "e", plain_ST_colors ? 3 : 4);
// Schéma d'un word =
//
// Low High
@ -196,10 +200,16 @@ void PI1_code_palette(const T_Components * palette, byte * dest)
for (i=0;i<16;i++)
{
w = ((word)(palette[i].R & 0xe0) << 3) | ((word)(palette[i].R & 0x10) << 7);
w |= ((word)(palette[i].G & 0xe0) >> 1) | ((word)(palette[i].G & 0x10) << 3);
w |= ((word)(palette[i].B & 0xe0) >> 5) | ((word)(palette[i].B & 0x10) >> 1);
w = ((word)(palette[i].R & 0xe0) << 3);
w |= ((word)(palette[i].G & 0xe0) >> 1);
w |= ((word)(palette[i].B & 0xe0) >> 5);
if (!plain_ST_colors)
{
// add the STe specific bit
w |= ((word)(palette[i].R & 0x10) << 7);
w |= ((word)(palette[i].G & 0x10) << 3);
w |= ((word)(palette[i].B & 0x10) >> 1);
}
*dest++ = (w >> 8);
*dest++ = (w & 0xff);
}