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[Editor] Add the possibility to change line opacity in Ink editor

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This commit is contained in:
Calixte Denizet 2022-07-24 22:19:09 +02:00
parent 45b9e8417d
commit 7831a100b3
10 changed files with 215 additions and 19 deletions
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18
src/core/annotation.js
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@ -3757,7 +3757,7 @@ class InkAnnotation extends MarkupAnnotation {
}
static async createNewAppearanceStream(annotation, xref, params) {
const { color, rect, rotation, paths, thickness } = annotation;
const { color, rect, rotation, paths, thickness, opacity } = annotation;
const [x1, y1, x2, y2] = rect;
let w = x2 - x1;
let h = y2 - y1;
@ -3770,6 +3770,11 @@ class InkAnnotation extends MarkupAnnotation {
`${thickness} w 1 J 1 j`,
`${getPdfColor(color, /* isFill */ false)}`,
];
if (opacity !== 1) {
appearanceBuffer.push("/R0 gs");
}
const buffer = [];
for (const { bezier } of paths) {
buffer.length = 0;
@ -3800,6 +3805,17 @@ class InkAnnotation extends MarkupAnnotation {
appearanceStreamDict.set("Matrix", matrix);
}
if (opacity !== 1) {
const resources = new Dict(xref);
const extGState = new Dict(xref);
const r0 = new Dict(xref);
r0.set("CA", opacity);
r0.set("Type", Name.get("ExtGState"));
extGState.set("R0", r0);
resources.set("ExtGState", extGState);
appearanceStreamDict.set("Resources", resources);
}
const ap = new StringStream(appearance);
ap.dict = appearanceStreamDict;