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vo_opengl: disable extended downscaling by default 

To simplify implementation, the same filter kernel was used for both
directions, even when the scaling factors were different. It turns
out that people actually did this, and that the resulting rendering
errors were rather visible. Disable this feature by default, as
fixing it would require structural changes, and it's a useless anyway.
This commit is contained in:
wm4 2012-11-11 17:58:52 +01:00
parent eb6688724c
commit e2eaedcb0a
2 changed files with 1 additions and 2 deletions
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2
DOCS/man/en/vo.rst
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@ -456,7 +456,7 @@ opengl-hq
This is equivalent to: This is equivalent to:
| --vo=opengl:lscale=lanczos2:fancy-downscaling:dither-depth=0:pbo:fbo-format=rgb16 | --vo=opengl:lscale=lanczos2:dither-depth=0:pbo:fbo-format=rgb16
Note that some cheaper LCDs do dithering that gravely interferes with Note that some cheaper LCDs do dithering that gravely interferes with
vo_opengl's dithering. Disabling dithering with ``dither-depth=-1`` helps. vo_opengl's dithering. Disabling dithering with ``dither-depth=-1`` helps.

1
libvo/vo_opengl.c
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@ -2148,7 +2148,6 @@ static int preinit(struct vo *vo, const char *arg)
.dither_depth = hq ? 0 : -1, .dither_depth = hq ? 0 : -1,
.fbo_format = hq ? GL_RGB16 : GL_RGB, .fbo_format = hq ? GL_RGB16 : GL_RGB,
.use_scale_sep = 1, .use_scale_sep = 1,
.use_fancy_downscaling = hq,
.scalers = { .scalers = {
{ .index = 0, .name = hq ? "lanczos2" : "bilinear" }, { .index = 0, .name = hq ? "lanczos2" : "bilinear" },
{ .index = 1, .name = "bilinear" }, { .index = 1, .name = "bilinear" },