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[orx-shade-styles] Replace analytic filtering with multisample based filtering

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This commit is contained in:
Edwin Jakobs
2025-03-04 17:34:52 +01:00
parent 098a26e1a9
commit 258c3c1535
2 changed files with 49 additions and 47 deletions
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85
orx-shade-styles/src/commonMain/kotlin/fills/gradients/GradientBase.kt
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@@ -34,6 +34,8 @@ open class GradientBase<C>(
var spreadMethod: Int by Parameter()
var fillUnits: Int by Parameter()
var fillFit: Int by Parameter()
var filterWindow: Int by Parameter("filterWindow", 2)
var filterSpread: Double by Parameter("filterSpread", 0.5)
init {
this.quantization = 0
@@ -87,47 +89,54 @@ open class GradientBase<C>(
coord.y = u_viewDimensions.y - coord.y;
}
coord = domainWarp(coord);
vec4 gradient;
vec2 dx = p_filterSpread * dFdx(coord) / (float(p_filterWindow) + 1.0);
vec2 dy = p_filterSpread * dFdy(coord) / (float(p_filterWindow) + 1.0);
for (int u = -p_filterWindow; u <= p_filterWindow; u++) {
for (int v = -p_filterWindow; v <= p_filterWindow; v++) {
float f = gradientFunction(coord);
f = levelWarp(coord, f);
if (p_quantization != 0) {
f *= float(p_quantization);
float seam = floor(f + 0.5);
vec2 d = vec2(dFdx(f), dFdy(f));
f = (f - seam) / length(d*2.0) + seam;
f = clamp(f, seam-.5, seam+.5);
f /= float(p_quantization);
vec2 scoord = coord + dx * float(u) + dy * float(v);
vec2 wcoord = domainWarp(scoord);
float f = gradientFunction(wcoord);
f = levelWarp(wcoord, f);
if (p_quantization != 0) {
f *= float(p_quantization);
f = floor(f + 0.5);
f /= float(p_quantization);
}
float sf;
float mf = 0.0;
if (p_spreadMethod == 0) { // PAD
sf = clamp(f, 0.0, 1.0);
} else if (p_spreadMethod == 1) { // REFLECT
sf = 2.0 * abs(f / 2.0 - floor(f / 2.0 + 0.5));
} else if (p_spreadMethod == 2) { // REPEAT
sf = mod(f, 1.0);
float seam = ceil(f);
vec2 d = vec2(dFdx(f), dFdy(f));
mf = (f - seam) / length(d*2.0) + seam;
}
int i = 0;
while (i < p_points_SIZE - 1 && sf >= p_points[i+1]) { i++; }
vec4 color0 = p_colors[i];
vec4 color1 = p_colors[(i+1) % p_colors_SIZE];
float g = (sf - p_points[i]) / (p_points[i+1] - p_points[i]);
vec4 m = mix(color0, color1, clamp(g, 0.0, 1.0));
m.rgb *= m.a;
gradient += m;
}
}
float sf;
float mf = 0.0;
if (p_spreadMethod == 0) { // PAD
sf = clamp(f, 0.0, 1.0);
} else if (p_spreadMethod == 1) { // REFLECT
sf = 2.0 * abs(f / 2.0 - floor(f / 2.0 + 0.5));
} else if (p_spreadMethod == 2) { // REPEAT
sf = mod(f, 1.0);
float seam = ceil(f);
vec2 d = vec2(dFdx(f), dFdy(f));
mf = (f - seam) / length(d*2.0) + seam;
gradient /= (float(p_filterWindow) * 2.0 + 1.0) * (float(p_filterWindow) * 2.0 + 1.0);
if (gradient.a > 0.0) {
gradient.rgb /= gradient.a;
}
int i = 0;
while (i < p_points_SIZE - 1 && sf >= p_points[i+1]) { i++; }
vec4 color0 = p_colors[i];
vec4 color1 = p_colors[(i+1) % p_colors_SIZE];
float g = (sf - p_points[i]) / (p_points[i+1] - p_points[i]);
vec4 gradient = mix(color0, color1, clamp(g, 0.0, 1.0));
if (mf > 0.0 && p_quantization == 0) {
gradient = p_colors[p_colors_SIZE - 1] * (1.0 - mf) + p_colors[0] * mf;
}
${generateColorTransform(colorType)}
x_fill *= gradient;
"""
}

11
orx-shade-styles/src/jvmDemo/kotlin/gradients/DemoGradient05.kt
View File

@@ -18,20 +18,13 @@ fun main() {
extend {
drawer.shadeStyle = gradient<ColorRGBa> {
stops[0.0] = ColorRGBa.BLACK
stops[0.5] = ColorRGBa.BLUE_STEEL
stops[1.0] = ColorRGBa.WHITE
fillUnits = FillUnits.WORLD
spreadMethod = SpreadMethod.REPEAT
//levelWarpFunction = """float levelWarp(vec2 p, float level) { return level + cos(p.x*0.01 + level)*0.1; } """
//quantization = 3
// stellar {
// radius = drawer.bounds.width/8.0
// center = drawer.bounds.position(0.5, 0.0)
// sides = 6
// sharpness = 0.5
// rotation = seconds * 36.0
// }
quantization = 10
conic {
angle = 360.0 * 8.0
center = drawer.bounds.position(0.5, 0.5)