gpu/shaders: update piet-gpu

Changes:

- fix BeginClip bounding box
- replace continue not supported by HLSL

Signed-off-by: Elias Naur <mail@eliasnaur.com>

gpu/shaders.go

@@ -4210,16 +4210,15 @@ void main()
             {
                 ElementRef param_73 = this_ref;
                 Clip begin_clip = Element_BeginClip_read(param_73);
+                anno_begin_clip.bbox = begin_clip.bbox;
                 if (is_stroke)
                 {
                     State param_74 = st;
                     vec2 lw_2 = get_linewidth(param_74);
-                    anno_begin_clip.bbox = begin_clip.bbox + vec4(-lw_2, lw_2);
                     anno_begin_clip.linewidth = st.linewidth * sqrt(abs((st.mat.x * st.mat.w) - (st.mat.y * st.mat.z)));
                 }
                 else
                 {
-                    anno_begin_clip.bbox = begin_clip.bbox;
                     anno_fill.linewidth = 0.0;
                 }
                 out_ref = AnnotatedRef(_2435.conf.anno_alloc.offset + ((st.path_count - 1u) * 32u));
@@ -5121,7 +5120,7 @@ void main()
                 CmdRef param_45 = cmd_ref;
                 cmd_ref = CmdRef(Cmd_Jump_read(param_44, param_45).new_ref);
                 cmd_alloc.offset = cmd_ref.offset;
-                continue;
+                break;
             }
         }
     }

gpu/shaders/elements.comp

@@ -386,13 +386,12 @@ void main() {
         case Element_BeginClip:
             Clip begin_clip = Element_BeginClip_read(this_ref);
             AnnoBeginClip anno_begin_clip;
+            // This is the absolute bbox, it's been transformed during encoding.
+            anno_begin_clip.bbox = begin_clip.bbox;
             if (is_stroke) {
                 vec2 lw = get_linewidth(st);
-                // This is the absolute bbox, it's been transformed during encoding.
-                anno_begin_clip.bbox = begin_clip.bbox + vec4(-lw, lw);
                 anno_begin_clip.linewidth = st.linewidth * sqrt(abs(st.mat.x * st.mat.w - st.mat.y * st.mat.z));
             } else {
-                anno_begin_clip.bbox = begin_clip.bbox;
                 anno_fill.linewidth = 0.0;
             }
             out_ref = AnnotatedRef(conf.anno_alloc.offset + (st.path_count - 1) * Annotated_size);

gpu/shaders/kernel4.comp

@@ -231,7 +231,7 @@ void main() {
         case Cmd_Jump:
             cmd_ref = CmdRef(Cmd_Jump_read(cmd_alloc, cmd_ref).new_ref);
             cmd_alloc.offset = cmd_ref.offset;
-            continue;
+            break;
         }
     }