stuff

modules/wallpaper-engine/shaders/editorpaintbrush.frag

@@ -0,0 +1,96 @@
+
+#include "common_blur.h"
+
+varying vec2 v_TexCoord;
+varying vec3 v_Position;
+
+uniform vec4 g_BrushPosition; // {"material":"brushposition","default":"0 0"}
+uniform vec4 g_BrushSettings; // {"material":"brushsettings","default":"0 0 0 0"}
+uniform vec4 g_BrushColor; // {"material":"brushcolor","default":"0 0 0"}
+
+uniform sampler2D g_Texture0;
+
+uniform vec4 g_Texture0Resolution;
+
+//uniform vec2 g_TexelSize;
+//uniform vec2 g_TexelSizeHalf;
+
+#define BRUSHSIZE g_BrushSettings.x
+
+void main() {
+	vec4 albedo = CAST4(0);
+	albedo.rgb = g_BrushColor;
+	
+	vec2 adjusted = (v_Position.xy - g_BrushPosition.xy) * g_BrushPosition.zw + g_BrushPosition.xy;
+
+	vec2 texelSize = 1;
+	vec4 multiSample = vec4(
+						length(vec2(adjusted.x - texelSize.x, adjusted.y - texelSize.y) - g_BrushPosition.xy),
+						length(vec2(adjusted.x + texelSize.x, adjusted.y - texelSize.y) - g_BrushPosition.xy),
+						length(vec2(adjusted.x + texelSize.x, adjusted.y + texelSize.y) - g_BrushPosition.xy),
+						length(vec2(adjusted.x - texelSize.x, adjusted.y + texelSize.y) - g_BrushPosition.xy)
+						);
+	
+	float feather = max(0.5f, BRUSHSIZE * 0.5f * (1.0f - g_BrushSettings.y));
+	vec4 blend4 = smoothstep(multiSample - feather, multiSample + feather, CAST4(BRUSHSIZE * 0.5f));
+	float blend = dot(blend4, CAST4(0.25));
+	
+	float opacity = mix(0.0f, g_BrushSettings.z, blend);
+	albedo.a = opacity;
+	
+#ifdef PINCH
+	float pinchSign = albedo.g * 2.0 - 1.0;
+	vec2 pinchDelta = ((adjusted - g_BrushPosition.xy) * pinchSign) / BRUSHSIZE;
+	float pinchDistance = length(pinchDelta);
+	pinchDelta /= pinchDistance;
+	pinchDistance = saturate(pinchDistance);
+	
+	vec2 pinchColor = pinchDelta * pinchDistance * 0.5 + 0.5;
+	albedo.b = 0.0;
+	albedo.rg = mix(vec2(0.5, 0.5), pinchColor, albedo.r);
+#endif
+
+#if SPIN
+	vec2 positionDelta = ((adjusted - g_BrushPosition.xy)) / BRUSHSIZE;
+	positionDelta.y = -positionDelta.y;
+	float temp = positionDelta.x;
+	positionDelta.x = positionDelta.y;
+	positionDelta.y = temp;
+	vec2 spinColor = positionDelta * 0.5 + 0.5;
+	
+	albedo.b = 0.0;
+	albedo.rg = mix(vec2(0.5, 0.5), spinColor, albedo.r);
+#endif
+	
+	gl_FragColor = albedo;
+	
+#if BLUR
+	// sample weights 3
+	// 0.14975490496277529 +
+	// 0.23722688396633606 +
+	// 0.23722688396633606 +
+	// 0.37579132710455257
+	// 0.72099
+	// (0.27901 / 0.72099)
+	// (0.44198 / 0.72099)
+	
+	// ggrid distance
+	// sum: 0.318663
+	
+	
+	vec2 tmpTexel = g_BrushColor.r * 10.0 / g_Texture0Resolution.xy;
+	
+	gl_FragColor.rgb = texSample2D(g_Texture0, v_TexCoord - tmpTexel * vec2((0.123317 / 0.318663), (0.123317 / 0.318663))).rgb * 0.37579132710455257 +
+					texSample2D(g_Texture0, v_TexCoord + vec2(tmpTexel.x, -tmpTexel.y) * vec2((0.195346 / 0.318663), (0.123317 / 0.318663))).rgb * 0.23722688396633606 +
+					texSample2D(g_Texture0, v_TexCoord + vec2(-tmpTexel.x, tmpTexel.y) * vec2((0.123317 / 0.318663), (0.195346 / 0.318663))).rgb * 0.23722688396633606 +
+					texSample2D(g_Texture0, v_TexCoord + tmpTexel * vec2((0.195346 / 0.318663), (0.195346 / 0.318663))).rgb * 0.14975490496277529;
+	
+	//gl_FragColor = texSample2D(g_Texture0, v_TexCoord - tmpTexel) +
+	//				texSample2D(g_Texture0, v_TexCoord + vec2(tmpTexel.x, -tmpTexel.y)) +
+	//				texSample2D(g_Texture0, v_TexCoord + vec2(-tmpTexel.x, tmpTexel.y)) +
+	//				texSample2D(g_Texture0, v_TexCoord + tmpTexel);
+	//gl_FragColor *= 0.25;
+	
+	//gl_FragColor.a = 1;
+#endif
+}