Update Files

leenkx/Shaders/bloom_pass/downsample_pass.frag.glsl

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+#version 450
+
+#include "compiled.inc" // bloomKnee, bloomThreshold
+#include "std/resample.glsl"
+
+uniform sampler2D tex;
+uniform vec2 screenSizeInv;
+uniform int currentMipLevel;
+
+#ifdef _CPostprocess
+	uniform vec4 BloomThresholdData; // Only filled with data if currentMipLevel == 0
+#endif
+
+in vec2 texCoord;
+
+out vec4 fragColor;
+
+const float epsilon = 6.2e-5; // see https://github.com/keijiro/KinoBloom/issues/15
+
+#ifdef _BloomAntiFlicker
+	const bool antiFlicker = true;
+#else
+	const bool antiFlicker = false;
+#endif
+
+void main() {
+	if (antiFlicker && currentMipLevel == 0) {
+		#ifdef _BloomQualityHigh
+			fragColor.rgb = downsample_13_tap_anti_flicker(tex, texCoord, screenSizeInv);
+		#else
+			#ifdef _BloomQualityMedium
+				fragColor.rgb = downsample_dual_filter_anti_flicker(tex, texCoord, screenSizeInv);
+			#else // _BloomQualityLow
+				fragColor.rgb = downsample_box_filter_anti_flicker(tex, texCoord, screenSizeInv);
+			#endif
+		#endif
+	}
+	else {
+		#ifdef _BloomQualityHigh
+			fragColor.rgb = downsample_13_tap(tex, texCoord, screenSizeInv);
+		#else
+			#ifdef _BloomQualityMedium
+				fragColor.rgb = downsample_dual_filter(tex, texCoord, screenSizeInv);
+			#else // _BloomQualityLow
+				fragColor.rgb = downsample_box_filter(tex, texCoord, screenSizeInv);
+			#endif
+		#endif
+	}
+
+	if (currentMipLevel == 0) {
+		// https://catlikecoding.com/unity/tutorials/advanced-rendering/bloom/#3.2
+		// https://catlikecoding.com/unity/tutorials/advanced-rendering/bloom/#3.4
+
+		float brightness = max(fragColor.r, max(fragColor.g, fragColor.b));
+
+		#ifdef _CPostprocess
+			// Only apply precalculation optimization if _CPostprocess, otherwise
+			// the compiler is able to do the same optimization for the constant
+			// values from compiled.inc without the need to pass a uniform
+			float softeningCurve = brightness - BloomThresholdData.y;
+			softeningCurve = clamp(softeningCurve, 0.0, BloomThresholdData.z); // "connect" to hard knee curve
+			softeningCurve = softeningCurve * softeningCurve * BloomThresholdData.w;
+
+			float contributionFactor = max(softeningCurve, brightness - BloomThresholdData.x);
+		#else
+			float softeningCurve = brightness - bloomThreshold + bloomKnee;
+			softeningCurve = clamp(softeningCurve, 0.0, 2.0 * bloomKnee);
+			softeningCurve = softeningCurve * softeningCurve / (4 * bloomKnee + epsilon);
+
+			float contributionFactor = max(softeningCurve, brightness - bloomThreshold);
+		#endif
+
+		contributionFactor /= max(epsilon, brightness);
+
+		fragColor.rgb *= contributionFactor;
+	}
+
+	fragColor.a = 1.0;
+}