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Valentin KleinandClaude Opus 5.5
7336a3f597
A wipeout was drawn only as its outline, so objects behind it stayed visible on the canvas and in PNG, SVG and PDF output. The display list gets a new primitive kind, Kind::Mask: the wipeout polygon as triangles that every backend fills with its background colour (paper white for SVG/PDF and plots, the raster background for PNG, the canvas colour or the white sheet on screen), in draw order, so it hides what came before it (DRAWORDER decides). The frame follows WIPEOUTFRAME: 0 none, 1 shown and plotted (default), 2 shown but not plotted. The GPU canvas drew all fills before all lines; it now splits the mesh into draw-order groups at each mask (MeshData::breaks) and draws each group's fills, lines and quads in turn. Infinite lines stay on top as before. Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>