diff options
Diffstat (limited to 'src/quick/scenegraph/shaders/outlinedtext.frag')
| -rw-r--r-- | src/quick/scenegraph/shaders/outlinedtext.frag | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/src/quick/scenegraph/shaders/outlinedtext.frag b/src/quick/scenegraph/shaders/outlinedtext.frag new file mode 100644 index 0000000000..b3e5475d5d --- /dev/null +++ b/src/quick/scenegraph/shaders/outlinedtext.frag @@ -0,0 +1,21 @@ +varying highp vec2 sampleCoord; +varying highp vec2 sCoordUp; +varying highp vec2 sCoordDown; +varying highp vec2 sCoordLeft; +varying highp vec2 sCoordRight; + +uniform sampler2D _qt_texture; +uniform lowp vec4 color; +uniform lowp vec4 styleColor; + +void main() +{ + lowp float glyph = texture2D(_qt_texture, sampleCoord).a; + lowp float outline = clamp(clamp(texture2D(_qt_texture, sCoordUp).a + + texture2D(_qt_texture, sCoordDown).a + + texture2D(_qt_texture, sCoordLeft).a + + texture2D(_qt_texture, sCoordRight).a, + 0.0, 1.0) - glyph, + 0.0, 1.0); + gl_FragColor = outline * styleColor + glyph * color; +}
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