[css-color-hdr] Remove ICtCp, Jzazbz and JzCzhz from color() production, w3c#11713

Author: svgeesus

css-color-hdr-1/Overview.bs

@@ -592,7 +592,16 @@ Mixing Dynamic Range Limits: the ''dynamic-range-limit-mix()'' function {#dynami
 	</pre>
 	</div>
 
-<!-- Big Text: ICTCP Jaz -->
+<!-- Big Text: ICTCP Jaz 
+
+████  ███▌  █████▌  ███▌  ████▌          █▌  ███▌  █████▌
+ ▐▌  █▌  █▌   █▌   █▌  █▌ █▌  █▌         █▌ ▐█ ▐█      ▐▌
+ ▐▌  █▌       █▌   █▌     █▌  █▌         █▌ █▌  █▌    ▐▌ 
+ ▐▌  █▌       █▌   █▌     ████▌          █▌ █▌  █▌   █▌  
+ ▐▌  █▌       █▌   █▌     █▌         █▌  █▌ █████▌  █    
+ ▐▌  █▌  █▌   █▌   █▌  █▌ █▌         █▌  █▌ █▌  █▌ █     
+████  ███▌    █▌    ███▌  █▌          ███▌  █▌  █▌ █████▌
+-->
 
 <h2 id="DI-HDR">
 	Device-Independent HDR Colors
@@ -719,7 +728,7 @@ Mixing Dynamic Range Limits: the ''dynamic-range-limit-mix()'' function {#dynami
 	<div class="example">
 		This color represents the sRGB color "lime" in ''ICtCp''
 		<pre>
-		<span class="swatch" style="--color: lime"></span> color(ictcp 0.5393 -0.2643 -0.0625)
+		<span class="swatch" style="--color: lime"></span> ictcp(0.5393 -0.2643 -0.0625)
 		</pre>
 	</div>
 
@@ -731,7 +740,7 @@ Mixing Dynamic Range Limits: the ''dynamic-range-limit-mix()'' function {#dynami
 		It is the same color as sRGB ''white''.
 		Diffuse white is 203 cd/m²  [[!Rec_BT.2100]].
 		<pre>
-		<span class="swatch" style="--color: white"></span> color(ictcp 0.58069 0 0)
+		<span class="swatch" style="--color: white"></span> ictcp(0.58069 0 0)
 		</pre>
 	</div>
 
@@ -781,7 +790,7 @@ Mixing Dynamic Range Limits: the ''dynamic-range-limit-mix()'' function {#dynami
 			It is the same color as sRGB ''white''.
 			Diffuse white is 203 cd/m²  [[!Rec_BT.2100]].
 			<pre>
-			<span class="swatch" style="--color: white"></span> color(jzazbz 0.22207 -0.00016 -0.00012)
+			<span class="swatch" style="--color: white"></span> jzazbz(0.22207 -0.00016 -0.00012)
 			</pre>
 		</div>
 		<!-- 
@@ -825,27 +834,29 @@ Mixing Dynamic Range Limits: the ''dynamic-range-limit-mix()'' function {#dynami
 		<div class="example">
 			This color represents the sRGB color "lime" in ''Jzazbz''
 			<pre>
-			<span class="swatch" style="--color: lime"></span> color(jzazbz 0.17542 -0.1179 0.1092)
+			<span class="swatch" style="--color: lime"></span> jzazbz(0.17542 -0.1179 0.1092)
 			</pre>
 			and here is the same color in the polar form
 			<pre>
-			<span class="swatch" style="--color: lime"></span> color(jzczhz 0.17542 0.1614 132.50)
+			<span class="swatch" style="--color: lime"></span> jzczhz(0.17542 0.1614 132.50)
 			</pre>
 		</div>
 
 	<h4 id='Jzazbz-to-JzCzHz'>
-		Converting ''Jzazbz'' colors to ''JzCzHz'' colors</h4>
+		Converting ''Jzazbz'' colors to ''JzCzhz'' colors</h4>
 
-			Conversion to ''JzCzHz'' is trivial:
+			Conversion to ''JzCzhz'' is trivial:
 
 			<ol>
-				<li>Hz = atan2(bz, az) // but convert to degrees!
+				<li>hz = atan2(bz, az) // but convert to degrees!
 				<li>Cz = sqrt(az^2 + bz^2)
 				<li>Jz is the same
 			</ol>
+
+		In addition, practical code should return a ''none'' value if Cz is less than ε.
 
 	<h4 id='JzCzHz-to-Jzazbz'>
-	Converting JzCzHz colors to Jzazbz  colors</h4>
+	Converting JzCzhz colors to Jzazbz  colors</h4>
 
 			Conversion to ''Jzazbz'' is trivial:
 
@@ -855,15 +866,20 @@ Mixing Dynamic Range Limits: the ''dynamic-range-limit-mix()'' function {#dynami
 				<li>Jz is the same
 			</ol>
 
+			In addition, practical code should check for a ''none'' value
+			for hz.
+
+
+
 <!-- Big Text:  color() 
 
- ███▌   ███▌  █▌     ███▌  ████▌    ██ ██  
-█▌  █▌ █▌  █▌ █▌    █▌  █▌ █▌  █▌  █▌   ▐█ 
-█▌     █▌  █▌ █▌    █▌  █▌ █▌  █▌ █▌     ▐█
-█▌     █▌  █▌ █▌    █▌  █▌ ████▌  █▌     ▐█
-█▌     █▌  █▌ █▌    █▌  █▌ █▌▐█   █▌     ▐█
-█▌  █▌ █▌  █▌ █▌    █▌  █▌ █▌ ▐█   █▌   ▐█ 
- ███▌   ███▌  █████  ███▌  █▌  █▌   ██ ██  
+ ███▌   ███▌  █▌     ███▌  ████▌    ██  ██  
+█▌  █▌ █▌  █▌ █▌    █▌  █▌ █▌  █▌  █▌    ▐█ 
+█▌     █▌  █▌ █▌    █▌  █▌ █▌  █▌ █▌      ▐█
+█▌     █▌  █▌ █▌    █▌  █▌ ████▌  █▌      ▐█
+█▌     █▌  █▌ █▌    █▌  █▌ █▌▐█   █▌      ▐█
+█▌  █▌ █▌  █▌ █▌    █▌  █▌ █▌ ▐█   █▌    ▐█ 
+ ███▌   ███▌  █████  ███▌  █▌  █▌   ██  ██  
 -->
 
 <h2 id="color-function">
@@ -883,13 +899,9 @@ Mixing Dynamic Range Limits: the ''dynamic-range-limit-mix()'' function {#dynami
 	Its syntax is now as follows:
 
 	<pre class='prod'>
-		<dfn>&lt;colorspace-params></dfn> = [<<custom-params>> | <<predefined-rgb-params>> | 
-			<<predefined-polar-params>> | <<predefined-rectangular-params>> | <<xyz-params>>]
-		<dfn>&lt;predefined-polar-params></dfn> = jzczhz [ <<number>> | <<percentage>> | none ]{2} [ <<hue>> | none]
-		<dfn>&lt;predefined-rectangular-params></dfn> = <<predefined-rectangular>> [ <<number>> | <<percentage>> | none ]{3}
+		<dfn>&lt;colorspace-params></dfn> = [<<custom-params>> | <<predefined-rgb-params>> | <<xyz-params>>]
 		<dfn>&lt;predefined-rgb></dfn> = srgb | srgb-linear | display-p3 | a98-rgb | prophoto-rgb | rec2020 | 
 			rec2100-pq | rec2100-hlg | rec2100-linear
-		<dfn>&lt;predefined-rectangular></dfn> = jzazbz | ictcp
 	</pre>