diff options
Diffstat (limited to 'src/quick/scenegraph/shaders/loqsubpixeldistancefieldtext.frag')
-rw-r--r-- | src/quick/scenegraph/shaders/loqsubpixeldistancefieldtext.frag | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/src/quick/scenegraph/shaders/loqsubpixeldistancefieldtext.frag b/src/quick/scenegraph/shaders/loqsubpixeldistancefieldtext.frag new file mode 100644 index 0000000000..61b6c8dd9a --- /dev/null +++ b/src/quick/scenegraph/shaders/loqsubpixeldistancefieldtext.frag @@ -0,0 +1,17 @@ +varying highp vec3 sampleNearLeft; +varying highp vec3 sampleNearRight; + +uniform sampler2D _qt_texture; +uniform lowp vec4 color; +uniform mediump float alphaMin; +uniform mediump float alphaMax; + +void main() +{ + highp vec2 n; + n.x = texture2DProj(_qt_texture, sampleNearLeft).a; + n.y = texture2DProj(_qt_texture, sampleNearRight).a; + n = smoothstep(alphaMin, alphaMax, n); + highp float c = 0.5 * (n.x + n.y); + gl_FragColor = vec4(n.x, c, n.y, c) * color.w; +}
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