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Save_2GS(): improve existing palette matching

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Thomas Bernard 2023-04-09 09:45:10 +02:00
parent 65f3f47819
commit ade3c54f02
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GPG Key ID: DB511043A31ACAAF
1 changed files with 15 additions and 14 deletions
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29
src/2gsformats.c
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@ -342,6 +342,7 @@ void Save_2GS(T_IO_Context * context)
FILE *file;
word x, y, n;
byte * palette_mapping;
byte * palette_used_colors;
struct line_data * lines;
word palette_count = 0;
long linelist_offset;
@ -350,6 +351,7 @@ void Save_2GS(T_IO_Context * context)
palette_mapping = GFX2_malloc(16 * context->Height);
memset(palette_mapping, 0, 16 * context->Height);
lines = GFX2_malloc(sizeof(struct line_data) * context->Height);
palette_used_colors = GFX2_malloc((256 / 8) * context->Height);
// Parcours de chaque ligne pour construire la / les palette(s)
for (y = 0; y < context->Height; y++)
{
@ -366,6 +368,7 @@ void Save_2GS(T_IO_Context * context)
if (lines[y].color_count > 16)
{
GFX2_Log(GFX2_DEBUG, "%u colors used on line %u !\n", lines[y].color_count, (unsigned)y);
free(palette_used_colors);
free(palette_mapping);
free(lines);
return;
@ -379,23 +382,19 @@ void Save_2GS(T_IO_Context * context)
{
if (lines[y].color_count == n)
{
word y2;
for (y2 = 0 ; y2 < context->Height; y2++)
word i;
for (i = 0; i < palette_count; i++)
{
if (lines[y2].palette_index != 0xffff)
for (x = 0; x < 32; x++)
{
// teste si toutes les couleurs de la ligne y sont aussi présentes dans la ligne y2
for (x = 0; x < 32; x++)
{
if (lines[y].used_colors[x] & ~lines[y2].used_colors[x])
break;
}
if (x == 32)
{
lines[y].palette_index = lines[y2].palette_index;
GFX2_Log(GFX2_DEBUG, "line#%u => pal#%u\n", y, lines[y].palette_index);
if (lines[y].used_colors[x] & ~palette_used_colors[i * (256 / 8) + x])
break;
}
}
if (x == 32)
{
lines[y].palette_index = i;
GFX2_Log(GFX2_DEBUG, "line#%u => pal#%u\n", y, lines[y].palette_index);
break;
}
}
// évolution : chercher parmi les palettes avec moins de 16 couleurs s'il y en a une qui convient
@ -406,6 +405,7 @@ void Save_2GS(T_IO_Context * context)
for (x = 0, index = 0; x < 256; x++)
if (lines[y].used_colors[x >> 3] & (1 << (x & 7)))
palette_mapping[palette_count * 16 + index++] = x;
memcpy(palette_used_colors + palette_count * (256 / 8), lines[y].used_colors, 256 / 8);
GFX2_Log(GFX2_DEBUG, " line#%u => pal#%u (new, %ucolors)\n", (unsigned)y, (unsigned)palette_count, (unsigned)index);
palette_count++;
}
@ -512,6 +512,7 @@ void Save_2GS(T_IO_Context * context)
error:
fclose(file);
}
free(palette_used_colors);
free(lines);
free(palette_mapping);
}