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Use Premultiplied Alpha for Text and Game Capture (#1578)

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The GDI+ based Text Source actually uses Premultiplied Alpha. The edges
of the fonts are therefore incorrectly blended, causing ugly artifacts
especially if bright text above a bright background is used. Here's an
image comparing the new text blending (left) to before (right):
![https://i.imgur.com/VhhkQcZ.png](https://i.imgur.com/VhhkQcZ.png)

Additionally, the game capture has the same problem, so premultiplied
alpha is used there as well now.
This commit is contained in:
Christopher Serr
2019-01-31 04:54:24 +01:00
committed by Colin Edwards
parent 0d9fb6c8b0
commit 7c53483388
2 changed files with 15 additions and 6 deletions
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2
plugins/win-capture/game-capture.c
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@@ -1771,7 +1771,7 @@ static void game_capture_render(void *data, gs_effect_t *effect)
return;
effect = obs_get_base_effect(gc->config.allow_transparency ?
OBS_EFFECT_DEFAULT : OBS_EFFECT_OPAQUE);
OBS_EFFECT_PREMULTIPLIED_ALPHA : OBS_EFFECT_OPAQUE);
while (gs_effect_loop(effect, "Draw")) {
obs_source_draw(gc->texture, 0, 0, 0, 0,