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Save_IFF(): better handling of pixel aspect ratio

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Thomas Bernard 2018-02-06 13:56:54 +01:00
parent a94f07ddde
commit a90170f3d1
1 changed files with 21 additions and 2 deletions
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23
src/fileformats.c
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@ -1653,8 +1653,27 @@ void Save_IFF(T_IO_Context * context)
header.Compression=1;
header.Pad1=0;
header.Transp_col=context->Background_transparent ? context->Transparent_color : 0;
header.X_aspect=context->Ratio == PIXEL_WIDE ? 2 : 1;
header.Y_aspect=context->Ratio == PIXEL_TALL ? 2 : 1;
header.X_aspect=10; // Amiga files are usually 10:11
header.Y_aspect=10;
switch (context->Ratio)
{
case PIXEL_SIMPLE:
case PIXEL_DOUBLE:
case PIXEL_TRIPLE:
case PIXEL_QUAD:
default:
break;
case PIXEL_WIDE:
case PIXEL_WIDE2:
header.X_aspect *= 2; // 2:1
break;
case PIXEL_TALL3: // 3:4
header.X_aspect = (header.X_aspect * 15) / 10; // *1.5
case PIXEL_TALL:
case PIXEL_TALL2:
header.Y_aspect *= 2; // 1:2
break;
}
header.X_screen = context->Width;// Screen_width?;
header.Y_screen = context->Height;// Screen_height?;