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gleffects: fix gleffects fisheye shader compile error

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On some embedded systems, sqrt() is not supported in the shader,
use the actual value of sqrt(2) instead.

Signed-off-by: Haihua Hu <b55597@freescale.com>
Bugzilla: https://bugzilla.gnome.org/show_bug.cgi?id=761271
This commit is contained in:
Haihua Hu 2015-12-08 14:09:58 +08:00 committed by Tim-Philipp Müller
parent 931090bf18
commit 3fb60ac10c
1 changed files with 1 additions and 1 deletions
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2
ext/gl/effects/gstgleffectssources.c
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@ -152,7 +152,7 @@ const gchar *fisheye_fragment_source_gles2 =
" vec2 normcoord;" " vec2 normcoord;"
" normcoord = texturecoord - 0.5;" " normcoord = texturecoord - 0.5;"
" float r = length (normcoord);" " float r = length (normcoord);"
" normcoord *= r * sqrt(2);" " normcoord *= r * 1.41421;" /* sqrt (2) */
" texturecoord = normcoord + 0.5;" " texturecoord = normcoord + 0.5;"
" gl_FragColor = texture2D (tex, texturecoord);" " gl_FragColor = texture2D (tex, texturecoord);"
"}"; "}";