68 lines
1.7 KiB
GLSL
68 lines
1.7 KiB
GLSL
#ifdef GL_ES
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precision mediump float;
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precision mediump int;
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#endif
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struct displayProperty {
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vec2 size;
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vec2 origin;
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vec2 insidePos;
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vec2 insideSize;
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};
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struct widgetStateProperty {
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int stateOld;
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int stateNew;
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float transition;
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};
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uniform displayProperty EW_widgetProperty;
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uniform widgetStateProperty EW_status;
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uniform vec4 EW_background;
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uniform vec4 EW_foreground;
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uniform vec4 EW_border;
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varying vec2 v_position; // interpolated position ...
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// internal static define
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float S_sizePadding = 3.0; // must not be NULL
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float S_sizeBorder = 2.0; //==> this id for 1 px border
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float S_roundedRatio = 10.0;
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void main(void) {
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// position form center :
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vec2 ratio = EW_widgetProperty.size / 2.0;
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// prevent origin moving ...
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vec2 position = v_position - EW_widgetProperty.origin;
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/* generate a central simetry
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____ _____
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\ /
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\ /
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\ /
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-
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*/
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vec2 positionCenter = abs(position-ratio);
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// This is a clip to remove center of the display of the widget
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vec2 ratioLow = ratio - (S_roundedRatio+S_sizePadding);
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vec2 circleMode = smoothstep(ratioLow, ratio, positionCenter)*(S_roundedRatio+S_sizePadding);
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// Calculate the distance of the radius
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float tmpDist = float(int(sqrt(dot(circleMode,circleMode))));
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// Generate the internal rampe for the the imput drawing
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float tmpVal = smoothstep(S_roundedRatio - S_sizeBorder*1.5,
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S_roundedRatio + S_sizeBorder*1.5,
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tmpDist);
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// set Background
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gl_FragColor = EW_background;
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// set foreground
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gl_FragColor = gl_FragColor*tmpVal + EW_foreground*(1.0-tmpVal);
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// set border
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float tmpVal2 = abs(tmpVal-0.5)*2.0;
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gl_FragColor = gl_FragColor*tmpVal2 + EW_border*(1.0-tmpVal2);
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}
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