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tilemap: update note (nw)

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hap 2019-07-26 16:50:39 +02:00
parent 90e89c0851
commit 19fc7eff99
1 changed files with 3 additions and 2 deletions
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5
src/emu/tilemap.cpp
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@ -953,8 +953,9 @@ g_profiler.start(PROFILER_TILEMAP_DRAW);
// flip the tilemap around the center of the visible area
rectangle visarea = screen.visible_area();
// These are not the width and height, rather 2 * left + width + 1,
// and 2 * top + height + 1, and these are inputs to the
// TODO: is this correct or are drivers relying on a bug here?
// These are not the width and height, rather 2 * left + width,
// and 2 * top + height, and these are inputs to the
// effective_*scroll functions used in the case of a flip.
u32 width = visarea.right() + visarea.left() + 1;
u32 height = visarea.bottom() + visarea.top() + 1;