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use appropriate blitters when mac color depth < 8 bit #6

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use appropriate blitters when mac color depth < 8 bit #6

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23 changes: 20 additions & 3 deletions src/CrossPlatform/video_blit.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -577,9 +577,26 @@ bool Screen_blitter_init(VisualFormat const & visual_format, bool native_byte_or
}
}
#else
// The UAE memory handlers will blit correctly
// --> no need for specialised blitters here
Screen_blit = Blit_Copy_Raw;
if (use_sdl_video && 8 > mac_depth && 8 == visual_format.depth) {
switch (mac_depth) {
case 1:
Screen_blit = Blit_Expand_1_To_8;
break;
case 2:
Screen_blit = Blit_Expand_2_To_8;
break;
case 4:
Screen_blit = Blit_Expand_4_To_8;
break;
default:
Screen_blit = Blit_Copy_Raw;
break;
}
} else {
// The UAE memory handlers will blit correctly
// --> no need for specialised blitters here
Screen_blit = Blit_Copy_Raw;
}
#endif

// If the blitter simply reduces to a copy, we don't need VOSF in DGA mode
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