Revision control
++ VARYING vec2 TexCoord0;
++ VARYING vec2 TexCoord1;
++ VARYING vec2 TexCoord2;
++ VARYING vec2 TexCoord3;
++
++ float advancedGetTiltShiftMultiplier(vec2 inTexCoord, float inFocusBarHeight, float inFocusWidth,
++ bool inVertical, bool inInvert)
++ {
++ float texPos = inVertical ? inTexCoord.x : 0.5 + (inTexCoord.y - 0.5) * (-FRAMEBUFFER_Y_UP);
++ float focusDiff = max(0.0, abs(texPos - inFocusBarHeight) - (inFocusWidth / 2.0))
++ / inFocusWidth;
++ float retval = clamp(focusDiff, 0.0, 1.0);
++ return inInvert ? 1.0 - retval : retval;
++ }
++
++ vec4 advancedBoxTiltShiftBlur(sampler2D inBlurSampler,
++ float inFocusBarHeight, float inFocusWidth,
++ bool inVertical, bool inInvert)
++ {
++ float mult0 = .25 * advancedGetTiltShiftMultiplier(TexCoord0, inFocusBarHeight, inFocusWidth,
++ inVertical, inInvert);
++ float mult1 = .25 * advancedGetTiltShiftMultiplier(TexCoord1, inFocusBarHeight, inFocusWidth,
++ inVertical, inInvert);
++ float mult2 = .25 * advancedGetTiltShiftMultiplier(TexCoord2, inFocusBarHeight, inFocusWidth,
++ inVertical, inInvert);
++ float mult3 = .25 * advancedGetTiltShiftMultiplier(TexCoord3, inFocusBarHeight, inFocusWidth,
++ inVertical, inInvert);
++ float multTotal = mult0 + mult1 + mult2 + mult3;
++ float totalDivisor = multTotal != 0.0 ? 1.0 / multTotal : 0.0;
++ vec4 outCol = texture(inBlurSampler, TexCoord0) * mult0;
++ outCol += texture(inBlurSampler, TexCoord1) * mult1;
++ outCol += texture(inBlurSampler, TexCoord2) * mult2;
++ outCol += texture(inBlurSampler, TexCoord3) * mult3;
++ return outCol * totalDivisor;
++ }
++
++ void MAIN()
++ {
++ FRAGCOLOR = advancedBoxTiltShiftBlur(INPUT, focusPosition, focusWidth, isVertical, isInverted);
++ }