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GIF format now saves pixel ratio in the Logical Screen Descriptor if you use tall or wide pixels. I know no viewer that respects it, so the only effect is that Grafx2 automatically switches to the right scaler when you reload the file.

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git-svn-id: svn://pulkomandy.tk/GrafX2/trunk@1855 416bcca6-2ee7-4201-b75f-2eb2f807beb1
This commit is contained in:
Yves Rizoud 2011-10-31 19:45:57 +00:00
parent b232e51c4c
commit 59a20c6e3e
1 changed files with 21 additions and 2 deletions
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23
src/fileformats.c
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@ -1884,6 +1884,7 @@ void Load_GIF(T_IO_Context * context)
int current_layer = 0;
int last_delay = 0;
byte is_transparent = 0;
enum PIXEL_RATIO ratio;
byte disposal_method = DISPOSAL_METHOD_RESTORE_BGCOLOR;
byte previous_disposal_method = DISPOSAL_METHOD_RESTORE_BGCOLOR;
@ -1919,7 +1920,14 @@ void Load_GIF(T_IO_Context * context)
Original_screen_X=LSDB.Width;
Original_screen_Y=LSDB.Height;
Pre_load(context, LSDB.Width,LSDB.Height,file_size,FORMAT_GIF,PIXEL_SIMPLE,0);
if (LSDB.Aspect==17)
ratio=PIXEL_TALL;
else if (LSDB.Aspect==113)
ratio=PIXEL_WIDE;
else
ratio=PIXEL_SIMPLE;
Pre_load(context, LSDB.Width,LSDB.Height,file_size,FORMAT_GIF,ratio,0);
context->Width=LSDB.Width;
context->Height=LSDB.Height;
@ -2450,7 +2458,18 @@ void Save_GIF(T_IO_Context * context)
}
LSDB.Resol =0x97; // Image en 256 couleurs, avec une palette
LSDB.Backcol=context->Transparent_color;
LSDB.Aspect =0; // Palette normale
switch(context->Ratio)
{
case PIXEL_TALL:
LSDB.Aspect = 17; // 1:2
break;
case PIXEL_WIDE:
LSDB.Aspect = 113; // 2:1
break;
default:
LSDB.Aspect = 0; // undefined, which is most frequent.
// 49 would be 1:1 ratio
}
// On sauve le LSDB dans le fichier