fix a little bit the labels transparency + request blank from allsky

src/core/src/downloader/query.rs

@@ -106,7 +106,7 @@ impl PixelMetadata {
         let format = cfg.get_format();
         let ext = format.get_ext_file();
 
-        let url = format!("{}/Norder0/Dir0/Npix0.{}", hips_url, ext);
+        let url = format!("{}/Norder3/Allsky.{}", hips_url, ext);
 
         PixelMetadata {
             hips_url,

src/core/src/renderable/labels.rs

@@ -370,7 +370,7 @@ impl RenderManager for TextRenderManager {
         self.gl.enable(WebGl2RenderingContext::BLEND);
         self.gl.blend_func_separate(
             WebGl2RenderingContext::SRC_ALPHA,
-            WebGl2RenderingContext::ONE,
+            WebGl2RenderingContext::ONE_MINUS_SRC_ALPHA,
             WebGl2RenderingContext::ONE,
             WebGl2RenderingContext::ONE,
         ); // premultiplied alpha

src/glsl/webgl2/text/text_frag.glsl

@@ -10,6 +10,7 @@ uniform sampler2D u_sampler_font;
 void main() {
     // The texture is set up with `SRGB8_ALPHA8`, so no need to decode here!
     float alpha = texture(u_sampler_font, v_tc).r;
+    alpha = smoothstep(0.1, 0.9, alpha);
 
     // Multiply vertex color with texture color (in linear space).
     // Linear color is written and blended in Framebuffer and converted to sRGB later

src/js/HpxImageSurvey.js

@@ -235,7 +235,7 @@ export let HpxImageSurvey = (function() {
 
             // HiPS grayscale
             this.colored = false;
-            if (metadata.dataproduct_subtype && metadata.dataproduct_subtype === "color") {
+            if (metadata.dataproduct_subtype && (metadata.dataproduct_subtype === "color" || metadata.dataproduct_subtype[0] === "color") ) {
                 this.colored = true;
             }