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Fix part of issue 433: Safety colors (after image load) are now only added when not already present in palette, and in reverse order so that in the very common case of 0=black, the white is added in slot 255 (Now it's more consistent with 'backspace' in palette which forcibly adds these colors in unused slots at the end)

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git-svn-id: svn://pulkomandy.tk/GrafX2/trunk@1775 416bcca6-2ee7-4201-b75f-2eb2f807beb1
This commit is contained in:
Yves Rizoud 2011-04-13 21:40:47 +00:00
parent 80e0b17be8
commit c266b38e05
1 changed files with 27 additions and 6 deletions
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29
src/loadsave.c
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@ -685,14 +685,35 @@ void Load_image(T_IO_Context *context)
memset(color_usage,0,sizeof(color_usage)); memset(color_usage,0,sizeof(color_usage));
if (Count_used_colors(color_usage)<252) if (Count_used_colors(color_usage)<252)
{ {
int gui_index=0; int gui_index;
// From white to black
for (gui_index=3; gui_index>=0; gui_index--)
{
int c; int c;
for (c=255; c>=0 && gui_index<4; c--) T_Components gui_color;
gui_color=*Favorite_GUI_color(gui_index);
// Try find a very close match (ignore last 2 bits)
for (c=255; c>=0; c--)
{
if ((context->Palette[c].R|3) == (gui_color.R|3)
&& (context->Palette[c].G|3) == (gui_color.G|3)
&& (context->Palette[c].B|3) == (gui_color.B|3) )
break;
}
if (c<0) // Not found
{
// Find an unused slot at end of palette
for (c=255; c>=0; c--)
{ {
if (color_usage[c]==0) if (color_usage[c]==0)
{ {
context->Palette[c]=*Favorite_GUI_color(gui_index); context->Palette[c]=gui_color;
gui_index++; // Tag as a used color
color_usage[c]=1;
break;
}
}
} }
} }
} }