#7 Translucency under DirectX

[Anonymous]

It would be nice if Allegro supported hardware
acceleration under DirectX for set_trans_blender() and
set_add_blender() and set_alpha_blender().

In a test case done by myself, Allegro runs at 250 fps
in Windows/DirectX with triple buffering and a simple
bitmapped background. If I add a small amount of
alpha-blended text to the screen (Ten or so letters,
being the name of the level), the framerate drops to
40 fps. Clearly, this is unacceptable.

• Connelly Barnes

[Robert J Ohannessian]

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AFAIK DDraw3 does not support hardware translucency. The software translucency will be sped up and some blenders should be 5-6 times faster by WIP 39.

[Eric Botcazou]

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Aren't you blending directly on your screen buffers ?
If so, we have found the problem (see the docs).