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synced 2026-09-21 00:23:56 +08:00
71 lines
1.7 KiB
C++
71 lines
1.7 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop application for the Telegram messaging service.
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For license and copyright information please follow this link:
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https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
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*/
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#include "ui/image/svg_preview.h"
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#include "base/debug_log.h"
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#include "ui/image/svg_safety.h"
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#include <QtGui/QPainter>
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#include <QtSvg/QSvgRenderer>
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namespace Ui {
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namespace {
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constexpr auto kMaxSvgSize = 1 * 1024 * 1024;
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constexpr auto kMaxDefaultRenderSize = 4096;
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} // namespace
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int SvgPreviewBytesLimit() {
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return kMaxSvgSize;
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}
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QImage RenderSvgPreview(const QByteArray &bytes, QSize maxSize) {
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if (bytes.isEmpty()) {
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return {};
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}
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if (bytes.size() > kMaxSvgSize) {
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LOG(("Svg Error: File too large (%1 bytes).").arg(bytes.size()));
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return {};
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}
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const auto sanitized = Images::SanitizeSvg(bytes);
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if (sanitized.isEmpty()) {
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return {};
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}
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auto renderer = QSvgRenderer();
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if (!renderer.load(sanitized) || !renderer.isValid()) {
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LOG(("Svg Error: Invalid data."));
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return {};
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}
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auto size = renderer.defaultSize();
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if (!maxSize.isEmpty()) {
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size = size.scaled(maxSize, Qt::KeepAspectRatio);
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} else if ((size.width() > kMaxDefaultRenderSize)
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|| (size.height() > kMaxDefaultRenderSize)) {
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size = size.scaled(
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kMaxDefaultRenderSize,
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kMaxDefaultRenderSize,
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Qt::KeepAspectRatio);
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}
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if ((size.width() <= 0) || (size.height() <= 0)) {
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LOG(("Svg Error: Bad size %1x%2."
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).arg(renderer.defaultSize().width()
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).arg(renderer.defaultSize().height()));
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return {};
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}
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auto rendered = QImage(size, QImage::Format_ARGB32_Premultiplied);
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rendered.fill(Qt::transparent);
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{
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QPainter p(&rendered);
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renderer.render(&p, QRect(QPoint(), size));
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}
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return rendered;
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}
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} // namespace Ui
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