waveform Darkone4 flat

texture tex : WAVEFORMDATA;

sampler sTex = sampler_state
{
    Texture = (tex);
    MipFilter = LINEAR;
    MinFilter = LINEAR;
    MagFilter = LINEAR;

    AddressU = Clamp;
};

struct VS_IN
{
    float2 pos : POSITION;
    float2 tc : TEXCOORD0;
};

struct PS_IN
{
    float4 pos : SV_POSITION;
    float2 tc : TEXCOORD0;
};


float4 backgroundColor : BACKGROUNDCOLOR;
float4 highlightColor  : HIGHLIGHTCOLOR;
float4 selectionColor  : SELECTIONCOLOR;
float4 textColor       : TEXTCOLOR;
float cursorPos        : CURSORPOSITION;
bool cursorVisible     : CURSORVISIBLE;
float seekPos          : SEEKPOSITION;
bool seeking           : SEEKING;
float4 replayGain      : REPLAYGAIN; // album gain, track gain, album peak, track peak
float2 viewportSize    : VIEWPORTSIZE;
bool horizontal        : ORIENTATION;
bool flipped           : FLIPPED;
bool shade_played      : SHADEPLAYED;

PS_IN VS( VS_IN input )
{
    PS_IN output = (PS_IN)0;

    float2 half_pixel = float2(1,-1) / viewportSize;
    output.pos = float4(input.pos - half_pixel, 0, 1);

    if (horizontal)
    {
        output.tc = float2((input.tc.x + 1.0) / 2.0, input.tc.y);
    }
    else
    {
        output.tc = float2((-input.tc.y + 1.0) / 2.0, input.tc.x);
    }

    if (flipped)
        output.tc.x = 1.0 - output.tc.x;

    return output;
}

float4 bar( float pos, float2 tc, float4 fg, float4 bg, float width, bool show )
{
    float dist = abs(pos - tc.x);
    float4 c = (show && dist < width)
        ? lerp(fg, bg, smoothstep(0, width, dist))
        : bg;
    return c;
}


float4 evaluate(float4 bg, float4 fg, float factor)
{
        return saturate(lerp(bg, fg, factor));
}

float4 played( float pos, float2 tc, float4 bg, float factor)
{
        float4 c = bg;
        if (pos > tc.x)
        {
                c = evaluate(backgroundColor, highlightColor, factor);
        }
        return c;
}

float RMSfactor( float2 tc, float border )
{
        float4 minmaxrms = tex1D(sTex, tc.x);

        minmaxrms.rgb -= 0.1 * minmaxrms.a;
        minmaxrms.rgb *= 0.8 + minmaxrms.a;

        float belowWave = tc.y + border - minmaxrms.r;
        float aboveWave = tc.y - border - minmaxrms.g;
        float factorWave = min(abs(belowWave), abs(aboveWave));
        bool insideWave = (belowWave > 0 && aboveWave < 0);

        float diffRms = abs(tc.y) - border - minmaxrms.b;
        float factorRms = abs(diffRms);
        bool insideRms = diffRms < 0;

        float factor = insideRms ? ( 1 + 0.2 * saturate(factorRms / border / 2)): 1.0;
        factor = insideWave ? (factor * saturate(factorWave / border / 1)) : 0.0; //1 = max sharp

        return factor;
}

float4 PS( PS_IN input ) : SV_Target
{
        float dx, dy;
        if (horizontal)
        {
                dx = 1/viewportSize.x;
                dy = 1/viewportSize.y;
        }
        else
        {
                dx = 1/viewportSize.y;
                dy = 1/viewportSize.x;
        }
        float seekWidth = 1 * dx;
        float positionWidth = 1 * dx;

        float factor = RMSfactor(input.tc, 2.5 * dy);

        float4 c0 = evaluate(backgroundColor, textColor, factor);
        if (shade_played)
                c0 = played(cursorPos, input.tc, c0, factor);
        c0 = bar(cursorPos, input.tc, selectionColor, c0, positionWidth, cursorVisible);
        c0 = bar(seekPos,   input.tc, selectionColor, c0, seekWidth,     seeking      );
        return c0;
}

technique10 Render10
{
    pass P0
    {
        SetGeometryShader( 0 );
        SetVertexShader( CompileShader( vs_4_0, VS() ) );
        SetPixelShader( CompileShader( ps_4_0, PS() ) );
    }
}

technique Render9
{
    pass
    {
        VertexShader = compile vs_2_0 VS();
        PixelShader = compile ps_2_0 PS();
    }
}