html: honour text color alpha (transparent -> invisible text) - #287
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… ExtGState) The bridge built text fill colors from the RGB channels only, so `color: transparent` rendered opaque black and `rgba(..., a)` rendered fully opaque. OCR text layers (transparent spans over a page scan) came out as black text on top of the image. Text runs with a < 255 now render in their own q/Q scope: a == 0 uses text rendering mode 3 (invisible but selectable/extractable), 0 < a < 255 loads a fill-alpha ExtGState. Opaque runs are unchanged. The glyph-run inline background pass gets the same ExtGState treatment. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01GPPrSydyY9syEfGC74Kch2
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…tches printpdf comes from fschutt/printpdf#287 (text honours color alpha) as a git dependency; azul-css from fschutt/azul#480 (invalid selectors drop their rule) via [patch.crates-io]. azul-core/-layout stay on 0.0.16: azul master's azul-layout does not build with printpdf's feature set. Cargo.lock is committed so the exact upstream commits are pinned, and CI builds with --locked. patches/ is removed. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01GPPrSydyY9syEfGC74Kch2
…kept beside this one) Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01WyGP18BMbfHvnTRYqNVjbP
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…r alpha) Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01WyGP18BMbfHvnTRYqNVjbP
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The bridge built text fill colors from the RGB channels only, so
color: transparentrendered opaque black andrgba(..., a)rendered fully opaque. OCR text layers (transparent spans over a page scan) came out as black text on top of the image.Text runs with a < 255 now render in their own q/Q scope: a == 0 uses text rendering mode 3 (invisible but selectable/extractable), 0 < a < 255 loads a fill-alpha ExtGState. Opaque runs are unchanged. The glyph-run inline background pass gets the same ExtGState treatment.
Claude-Session: https://claude.ai/code/session_01GPPrSydyY9syEfGC74Kch2