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#ifndef ALLOW_INCLUDES
#define ALLOW_INCLUDES
#extension GL_ARB_shading_language_include : enable
#endif
#ifndef INNER_GLOW_GLSL
#define INNER_GLOW_GLSL
#include "cm_helpers.glsl"
float innerGlowAlpha(float distFromEdge, float range, float glowPower) {
if (distFromEdge >= range)
return 0.0;
if (distFromEdge <= 0.0)
return 1.0;
return pow(1.0 - distFromEdge / range, glowPower);
}
float innerGlowModifiedLength(vec2 a, float roundingPower) {
return pow(pow(abs(a.x), roundingPower) + pow(abs(a.y), roundingPower), 1.0 / roundingPower);
}
float innerGlowSmin(float a, float b, float k) {
float h = max(k - abs(a - b), 0.0) / k;
return min(a, b) - h * h * h * k * (1.0 / 6.0);
}
vec4 getInnerGlow(vec4 pixColor, vec2 v_texcoord, float radius, float roundingPower, vec2 topLeft, vec2 fullSize, float range, float glowPower, vec2 bottomRight
#if USE_CM
,
int sourceTF, int targetTF, mat3 convertMatrix, vec2 srcTFRange, vec2 dstTFRange
#if USE_ICC
,
highp sampler3D iccLut3D, float iccLutSize
#else
#if USE_TONEMAP || USE_SDR_MOD
,
mat3 targetPrimariesXYZ
#endif
#if USE_TONEMAP
,
float maxLuminance, float dstMaxLuminance, float dstRefLuminance, float srcRefLuminance
#endif
#if USE_SDR_MOD
,
float sdrSaturation, float sdrBrightnessMultiplier
#endif
#endif
#endif
) {
vec2 pixCoord = fullSize * v_texcoord;
// clip to the rounded rectangle shape using actual SDF
vec2 center = fullSize * 0.5;
vec2 p = abs(pixCoord - center);
vec2 q = p - (center - vec2(radius));
vec2 qc = max(q, vec2(0.0));
float cornerD = (qc.x > 0.0 || qc.y > 0.0) ? innerGlowModifiedLength(qc, roundingPower) : 0.0;
float sdfDist = cornerD + min(max(q.x, q.y), 0.0) - radius;
if (sdfDist > 0.0)
discard;
// smooth-min of edge distances for rounded glow contours
float distT = pixCoord.y;
float distB = fullSize.y - pixCoord.y;
float distL = pixCoord.x;
float distR = fullSize.x - pixCoord.x;
float k = range;
float distFromEdge = innerGlowSmin(innerGlowSmin(distT, distB, k), innerGlowSmin(distL, distR, k), k);
pixColor[3] = pixColor[3] * innerGlowAlpha(distFromEdge, range, glowPower);
if (pixColor[3] == 0.0)
discard;
// premultiply
pixColor.rgb *= pixColor[3];
#if USE_CM
pixColor = doColorManagement(pixColor, sourceTF, targetTF, convertMatrix, srcTFRange, dstTFRange
#if USE_ICC
,
iccLut3D, iccLutSize
#else
#if USE_TONEMAP || USE_SDR_MOD
,
targetPrimariesXYZ
#endif
#if USE_TONEMAP
,
maxLuminance, dstMaxLuminance, dstRefLuminance, srcRefLuminance
#endif
#if USE_SDR_MOD
,
sdrSaturation, sdrBrightnessMultiplier
#endif
#endif
);
#endif
return pixColor;
}
#endif
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