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Add out of memory error handling for PDF to TIFF conversion

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alam00000
2026-08-14 14:56:23 +05:30
parent 866ecfed2d
commit e1a4a31458
2 changed files with 140 additions and 98 deletions
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public/locales/en/tools.json
+2 -1
View File
@@ -400,7 +400,8 @@
"noFile": "No File",
"noFileExplanation": "Please upload a PDF file first.",
"conversionSuccess": "PDF converted to TIFFs successfully!",
"conversionError": "Failed to convert PDF to TIFF. The file might be corrupted."
"conversionError": "Failed to convert PDF to TIFF. The file might be corrupted.",
"conversionOutOfMemory": "The browser ran out of memory while converting. Try a lower DPI, or uncheck the multi-page TIFF option to convert pages one at a time."
}
},
"pdfToCbz": {
src/js/logic/pdf-to-tiff-page.ts
+67 -26
View File
@@ -36,6 +36,7 @@ async function getVips(): Promise<typeof Vips> {
return fileName;
},
});
vipsInstance.Cache.max(0);
return vipsInstance;
}
@@ -145,7 +146,11 @@ async function renderPageToRgba(
}).promise;
const imageData = context.getImageData(0, 0, canvas.width, canvas.height);
return { rgba: imageData.data, width: canvas.width, height: canvas.height };
const { width, height } = canvas;
page.cleanup();
canvas.width = 0;
canvas.height = 0;
return { rgba: imageData.data, width, height };
}
function encodePageToTiff(
@@ -155,28 +160,33 @@ function encodePageToTiff(
height: number,
options: TiffOptions
): Uint8Array {
let image = vips.Image.newFromMemory(
const intermediates: Vips.Image[] = [];
const track = (img: Vips.Image): Vips.Image => {
intermediates.push(img);
return img;
};
try {
let image = track(
vips.Image.newFromMemory(
new Uint8Array(rgba.buffer, rgba.byteOffset, rgba.byteLength),
width,
height,
4,
vips.BandFormat.uchar
)
);
image = image.copy();
image = track(image.copy());
const pixelsPerMm = options.dpi / 25.4;
image.setDouble('xres', pixelsPerMm);
image.setDouble('yres', pixelsPerMm);
if (image.bands === 4) {
image = track(image.flatten({ background: [255, 255, 255] }));
}
if (options.colorMode === 'greyscale' || options.colorMode === 'bw') {
if (image.bands === 4) {
image = image.flatten({ background: [255, 255, 255] });
}
image = image.colourspace(vips.Interpretation.b_w);
} else {
if (image.bands === 4) {
image = image.flatten({ background: [255, 255, 255] });
}
image = track(image.colourspace(vips.Interpretation.b_w));
}
const tiffOptions: Parameters<typeof image.tiffsaveBuffer>[0] = {
@@ -198,9 +208,12 @@ function encodePageToTiff(
tiffOptions.Q = 85;
}
const buffer = image.tiffsaveBuffer(tiffOptions);
image.delete();
return buffer;
return image.tiffsaveBuffer(tiffOptions);
} finally {
for (const img of intermediates) {
if (!img.isDeleted()) img.delete();
}
}
}
async function convert() {
@@ -239,6 +252,7 @@ async function convert() {
if (options.multiPage && pdf.numPages > 1) {
const pages: Vips.Image[] = [];
try {
for (let i = 1; i <= pdf.numPages; i++) {
const page = await pdf.getPage(i);
const { rgba, width, height } = await renderPageToRgba(
@@ -246,26 +260,39 @@ async function convert() {
options.dpi
);
let img = vips.Image.newFromMemory(
const intermediates: Vips.Image[] = [];
const track = (image: Vips.Image): Vips.Image => {
intermediates.push(image);
return image;
};
try {
let img = track(
vips.Image.newFromMemory(
new Uint8Array(rgba.buffer, rgba.byteOffset, rgba.byteLength),
width,
height,
4,
vips.BandFormat.uchar
)
);
if (options.colorMode === 'greyscale' || options.colorMode === 'bw') {
if (img.bands === 4) {
img = img.flatten({ background: [255, 255, 255] });
}
img = img.colourspace(vips.Interpretation.b_w);
} else {
if (img.bands === 4) {
img = img.flatten({ background: [255, 255, 255] });
img = track(img.flatten({ background: [255, 255, 255] }));
}
if (
options.colorMode === 'greyscale' ||
options.colorMode === 'bw'
) {
img = track(img.colourspace(vips.Interpretation.b_w));
}
pages.push(img);
pages.push(img.copyMemory());
} finally {
for (const img of intermediates) {
if (!img.isDeleted()) img.delete();
}
}
}
const firstPage = pages[0];
@@ -274,6 +301,7 @@ async function convert() {
joined = vips.Image.arrayjoin(pages, { across: 1 });
}
try {
const tiffOptions: Parameters<typeof joined.tiffsaveBuffer>[0] = {
compression: options.compression as Vips.Enum,
resunit: vips.ForeignTiffResunit.inch,
@@ -295,13 +323,18 @@ async function convert() {
}
const buffer = joined.tiffsaveBuffer(tiffOptions);
const blob = new Blob([new Uint8Array(buffer)], { type: 'image/tiff' });
const blob = new Blob([new Uint8Array(buffer)], {
type: 'image/tiff',
});
downloadFile(blob, getCleanPdfFilename(files[0].name) + '.tiff');
joined.delete();
} finally {
if (joined !== firstPage && !joined.isDeleted()) joined.delete();
}
} finally {
for (const p of pages) {
if (!p.isDeleted()) p.delete();
}
}
} else if (pdf.numPages === 1) {
const page = await pdf.getPage(1);
const { rgba, width, height } = await renderPageToRgba(page, options.dpi);
@@ -334,7 +367,15 @@ async function convert() {
);
} catch (e) {
console.error(e);
const message = e instanceof Error ? e.message : String(e);
if (/memory/i.test(message)) {
showAlert(
t('common.error'),
t('tools:pdfToTiff.alert.conversionOutOfMemory')
);
} else {
showAlert(t('common.error'), t('tools:pdfToTiff.alert.conversionError'));
}
} finally {
hideLoader();
}