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af5d892a7e
While it's nice to see <img src="foo.svg"> suddenly work in Ladybird after linking with the Qt SVG module, this is cheating. We should implement SVG-as-image ourselves instead of relying on 3rd party code to do it. :^)
84 lines
2.5 KiB
C++
84 lines
2.5 KiB
C++
/*
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* Copyright (c) 2022, Dex♪ <dexes.ttp@gmail.com>
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* Copyright (c) 2022, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include "ImageCodecPluginLadybird.h"
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#include <LibGfx/Bitmap.h>
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#include <LibGfx/ImageFormats/ImageDecoder.h>
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#include <QImage>
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namespace Ladybird {
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ImageCodecPluginLadybird::~ImageCodecPluginLadybird() = default;
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static Optional<Web::Platform::DecodedImage> decode_image_with_qt(ReadonlyBytes data)
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{
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auto image = QImage::fromData(data.data(), static_cast<int>(data.size()));
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if (image.isNull())
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return {};
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image = image.convertToFormat(QImage::Format::Format_ARGB32);
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auto bitmap = MUST(Gfx::Bitmap::create(Gfx::BitmapFormat::BGRA8888, Gfx::IntSize(image.width(), image.height())));
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for (int y = 0; y < image.height(); ++y) {
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memcpy(bitmap->scanline_u8(y), image.scanLine(y), image.width() * 4);
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}
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Vector<Web::Platform::Frame> frames;
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frames.append(Web::Platform::Frame {
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bitmap,
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});
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return Web::Platform::DecodedImage {
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false,
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0,
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move(frames),
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};
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}
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static Optional<Web::Platform::DecodedImage> decode_image_with_libgfx(ReadonlyBytes data)
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{
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auto decoder = Gfx::ImageDecoder::try_create_for_raw_bytes(data);
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if (!decoder || !decoder->frame_count()) {
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return {};
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}
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bool had_errors = false;
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Vector<Web::Platform::Frame> frames;
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for (size_t i = 0; i < decoder->frame_count(); ++i) {
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auto frame_or_error = decoder->frame(i);
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if (frame_or_error.is_error()) {
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frames.append({ {}, 0 });
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had_errors = true;
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} else {
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auto frame = frame_or_error.release_value();
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frames.append({ move(frame.image), static_cast<size_t>(frame.duration) });
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}
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}
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if (had_errors)
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return {};
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return Web::Platform::DecodedImage {
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decoder->is_animated(),
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static_cast<u32>(decoder->loop_count()),
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move(frames),
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};
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}
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Optional<Web::Platform::DecodedImage> ImageCodecPluginLadybird::decode_image(ReadonlyBytes data)
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{
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auto image = decode_image_with_libgfx(data);
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if (image.has_value())
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return image;
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// NOTE: Even though Qt can decode SVG images for us, let's not do that.
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// We should handle <img src="foo.svg"> ourselves instead of cheating by using Qt.
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if (data.starts_with("<?xml"sv.bytes()) || data.starts_with("<svg"sv.bytes()))
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return {};
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return decode_image_with_qt(data);
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}
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}
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