mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2025-10-25 09:30:01 +00:00
6a96920dbc
We don't need intrinsic scale factors for Gfx::Bitmap in Ladybird, as everything flows through the CSS / device pixel ratio mechanism. This patch also removes various unused functions instead of adapting them to the change.
128 lines
4.9 KiB
C++
128 lines
4.9 KiB
C++
/*
|
|
* Copyright (c) 2020-2022, Andreas Kling <kling@serenityos.org>
|
|
* Copyright (c) 2024, Kenneth Myhra <kennethmyhra@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <LibGfx/Bitmap.h>
|
|
#include <LibJS/Runtime/TypedArray.h>
|
|
#include <LibWeb/Bindings/ImageDataPrototype.h>
|
|
#include <LibWeb/Bindings/Intrinsics.h>
|
|
#include <LibWeb/HTML/ImageData.h>
|
|
#include <LibWeb/WebIDL/Buffers.h>
|
|
#include <LibWeb/WebIDL/DOMException.h>
|
|
#include <LibWeb/WebIDL/ExceptionOr.h>
|
|
|
|
namespace Web::HTML {
|
|
|
|
JS_DEFINE_ALLOCATOR(ImageData);
|
|
|
|
// https://html.spec.whatwg.org/multipage/canvas.html#dom-imagedata
|
|
WebIDL::ExceptionOr<JS::NonnullGCPtr<ImageData>> ImageData::create(JS::Realm& realm, u32 sw, u32 sh, Optional<ImageDataSettings> const&)
|
|
{
|
|
auto& vm = realm.vm();
|
|
|
|
// 1. If one or both of sw and sh are zero, then throw an "IndexSizeError" DOMException.
|
|
if (sw == 0 || sh == 0)
|
|
return WebIDL::IndexSizeError::create(realm, "The source width and height must be greater than zero."_fly_string);
|
|
|
|
// 2. Initialize this given sw, sh, and settings set to settings.
|
|
// 3. Initialize the image data of this to transparent black.
|
|
auto data = TRY(JS::Uint8ClampedArray::create(realm, sw * sh * 4));
|
|
auto bitmap = TRY_OR_THROW_OOM(vm, Gfx::Bitmap::create_wrapper(Gfx::BitmapFormat::RGBA8888, Gfx::IntSize(sw, sh), sw * sizeof(u32), data->data().data()));
|
|
|
|
return realm.heap().allocate<ImageData>(realm, realm, bitmap, data);
|
|
}
|
|
|
|
WebIDL::ExceptionOr<JS::NonnullGCPtr<ImageData>> ImageData::construct_impl(JS::Realm& realm, u32 sw, u32 sh, Optional<ImageDataSettings> const& settings)
|
|
{
|
|
return ImageData::create(realm, sw, sh, settings);
|
|
}
|
|
|
|
// https://html.spec.whatwg.org/multipage/canvas.html#dom-imagedata-with-data
|
|
WebIDL::ExceptionOr<JS::NonnullGCPtr<ImageData>> ImageData::create(JS::Realm& realm, JS::Handle<WebIDL::BufferSource> const& data, u32 sw, Optional<u32> sh, Optional<ImageDataSettings> const&)
|
|
{
|
|
auto& vm = realm.vm();
|
|
|
|
if (!is<JS::Uint8ClampedArray>(*data->raw_object()))
|
|
return vm.throw_completion<JS::TypeError>(JS::ErrorType::NotAnObjectOfType, "Uint8ClampedArray");
|
|
|
|
auto& uint8_clamped_array_data = static_cast<JS::Uint8ClampedArray&>(*data->raw_object());
|
|
|
|
// 1. Let length be the number of bytes in data.
|
|
auto length = uint8_clamped_array_data.byte_length().length();
|
|
|
|
// 2. If length is not a nonzero integral multiple of four, then throw an "InvalidStateError" DOMException.
|
|
if (length == 0 || length % 4 != 0)
|
|
return WebIDL::InvalidStateError::create(realm, "Source data must have a non-sero length that is a multiple of four."_fly_string);
|
|
|
|
// 3. Let length be length divided by four.
|
|
length = length / 4;
|
|
|
|
// 4. If length is not an integral multiple of sw, then throw an "IndexSizeError" DOMException.
|
|
// NOTE: At this step, the length is guaranteed to be greater than zero (otherwise the second step above would have aborted the steps),
|
|
// so if sw is zero, this step will throw the exception and return.
|
|
if (sw == 0 || length % sw != 0)
|
|
return WebIDL::IndexSizeError::create(realm, "Source width must be a multiple of source data's length."_fly_string);
|
|
|
|
// 5. Let height be length divided by sw.
|
|
auto height = length / sw;
|
|
|
|
// 6. If sh was given and its value is not equal to height, then throw an "IndexSizeError" DOMException.
|
|
if (sh.has_value() && sh.value() != height)
|
|
return WebIDL::IndexSizeError::create(realm, "Source height must be equal to the calculated height of the data."_fly_string);
|
|
|
|
// 7. Initialize this given sw, sh, settings set to settings, and source set to data.
|
|
auto bitmap = TRY_OR_THROW_OOM(vm, Gfx::Bitmap::create_wrapper(Gfx::BitmapFormat::RGBA8888, Gfx::IntSize(sw, height), sw * sizeof(u32), uint8_clamped_array_data.data().data()));
|
|
|
|
return realm.heap().allocate<ImageData>(realm, realm, bitmap, uint8_clamped_array_data);
|
|
}
|
|
|
|
WebIDL::ExceptionOr<JS::NonnullGCPtr<ImageData>> ImageData::construct_impl(JS::Realm& realm, JS::Handle<WebIDL::BufferSource> const& data, u32 sw, Optional<u32> sh, Optional<ImageDataSettings> const& settings)
|
|
{
|
|
return ImageData::create(realm, data, sw, move(sh), settings);
|
|
}
|
|
|
|
ImageData::ImageData(JS::Realm& realm, NonnullRefPtr<Gfx::Bitmap> bitmap, JS::NonnullGCPtr<JS::Uint8ClampedArray> data)
|
|
: PlatformObject(realm)
|
|
, m_bitmap(move(bitmap))
|
|
, m_data(move(data))
|
|
{
|
|
}
|
|
|
|
ImageData::~ImageData() = default;
|
|
|
|
void ImageData::initialize(JS::Realm& realm)
|
|
{
|
|
Base::initialize(realm);
|
|
WEB_SET_PROTOTYPE_FOR_INTERFACE(ImageData);
|
|
}
|
|
|
|
void ImageData::visit_edges(Cell::Visitor& visitor)
|
|
{
|
|
Base::visit_edges(visitor);
|
|
visitor.visit(m_data);
|
|
}
|
|
|
|
unsigned ImageData::width() const
|
|
{
|
|
return m_bitmap->width();
|
|
}
|
|
|
|
unsigned ImageData::height() const
|
|
{
|
|
return m_bitmap->height();
|
|
}
|
|
|
|
JS::Uint8ClampedArray* ImageData::data()
|
|
{
|
|
return m_data;
|
|
}
|
|
|
|
const JS::Uint8ClampedArray* ImageData::data() const
|
|
{
|
|
return m_data;
|
|
}
|
|
|
|
}
|