forked from 1b-agent/opencadstudio-upstream
Rectangular paper viewports now go through the same GPU stencil clip as non-rectangular ones: viewport_clip_boundary_ndc returns the four rect corners (a full-target mask) instead of nothing, so the render path has no rect/non-rect special case — every content viewport carries a clip boundary and draws with stencil reference 0xFF. With a single clip path, the old per-wire / -image / -wipeout scissor mechanism is fully dead and removed: compute_*_scissors, the *_pixel_scissors buffers, the project_scissor helper, the per-pass set_scissor_rect blocks, the vp_scissor field threaded through WireModel / ImageModel / HatchModel and their GPU mirrors (WireGpu / ImageGpu / WipeoutGpu / HatchWebGpu), from_run's scissor parameter, the scissor grouping in build_wire_buffers, and the is_arena_eligible gate. Net -245 lines across 54 files. Rectangular viewports still clip exactly via their own render rectangle; the stencil mask is a redundant full-target no-op there, kept only so the clip code path stays uniform. XCLIP keeps its CPU wire clip. Co-Authored-By: Claude Opus 4.8 <[email protected]>