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ladybird/Libraries/LibGfx/ImmutableBitmap.h

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LibGfx+LibWeb: Add ImmutableBitmap for images bitmap caching in painter Before this change, we used Gfx::Bitmap to represent both decoded images that are not going to be mutated and bitmaps corresponding to canvases that could be mutated. This change introduces a wrapper for bitmaps that are not going to be mutated, so the painter could do caching: texture caching in the case of GPU painter and potentially scaled bitmap caching in the case of CPU painter.
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/*
LibWeb: Return ImmutableBitmap from PaintingSurface::create_snapshot() This is a preparation for upcoming changes where ImmutableBitmap will own SkImage allowing Skia to cache GPU textures across repaints.
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* Copyright (c) 2023-2024, Aliaksandr Kalenik <kalenik.aliaksandr@gmail.com>
LibGfx+LibWeb: Add ImmutableBitmap for images bitmap caching in painter Before this change, we used Gfx::Bitmap to represent both decoded images that are not going to be mutated and bitmaps corresponding to canvases that could be mutated. This change introduces a wrapper for bitmaps that are not going to be mutated, so the painter could do caching: texture caching in the case of GPU painter and potentially scaled bitmap caching in the case of CPU painter.
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*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Forward.h>
LibGfx+LibWeb: Cache SkImage in ImmutableBitmap By caching the SkImage that is reused across repaints, we allow Skia t optimize GPU texture caching. ImmutableBitmap is chosen to own the SkImage because it guarantees that the underlying pixels cannot be modified. This is not the case for Gfx::Bitmap, where invalidating the SkImage would be challenging since it exposes pointers to underlying data through methods like scanline().
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#include <AK/NonnullOwnPtr.h>
LibGfx+LibWeb: Add ImmutableBitmap for images bitmap caching in painter Before this change, we used Gfx::Bitmap to represent both decoded images that are not going to be mutated and bitmaps corresponding to canvases that could be mutated. This change introduces a wrapper for bitmaps that are not going to be mutated, so the painter could do caching: texture caching in the case of GPU painter and potentially scaled bitmap caching in the case of CPU painter.
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#include <AK/RefCounted.h>
#include <LibGfx/Bitmap.h>
#include <LibGfx/Forward.h>
#include <LibGfx/Rect.h>
LibGfx+LibWeb: Cache SkImage in ImmutableBitmap By caching the SkImage that is reused across repaints, we allow Skia t optimize GPU texture caching. ImmutableBitmap is chosen to own the SkImage because it guarantees that the underlying pixels cannot be modified. This is not the case for Gfx::Bitmap, where invalidating the SkImage would be challenging since it exposes pointers to underlying data through methods like scanline().
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class SkImage;
LibGfx+LibWeb: Add ImmutableBitmap for images bitmap caching in painter Before this change, we used Gfx::Bitmap to represent both decoded images that are not going to be mutated and bitmaps corresponding to canvases that could be mutated. This change introduces a wrapper for bitmaps that are not going to be mutated, so the painter could do caching: texture caching in the case of GPU painter and potentially scaled bitmap caching in the case of CPU painter.
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namespace Gfx {
LibGfx+LibWeb: Cache SkImage in ImmutableBitmap By caching the SkImage that is reused across repaints, we allow Skia t optimize GPU texture caching. ImmutableBitmap is chosen to own the SkImage because it guarantees that the underlying pixels cannot be modified. This is not the case for Gfx::Bitmap, where invalidating the SkImage would be challenging since it exposes pointers to underlying data through methods like scanline().
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struct ImmutableBitmapImpl;
LibGfx+LibWeb: Add ImmutableBitmap for images bitmap caching in painter Before this change, we used Gfx::Bitmap to represent both decoded images that are not going to be mutated and bitmaps corresponding to canvases that could be mutated. This change introduces a wrapper for bitmaps that are not going to be mutated, so the painter could do caching: texture caching in the case of GPU painter and potentially scaled bitmap caching in the case of CPU painter.
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class ImmutableBitmap final : public RefCounted<ImmutableBitmap> {
public:
static NonnullRefPtr<ImmutableBitmap> create(NonnullRefPtr<Bitmap> bitmap);
LibGfx+LibWeb: Create PaintingSurface snapshot without GPU->RAM readback ...by constructing ImmutableBitmap directly from SkImage. This is a huge optimization for the case when content of canvas is painted onto another canvas, as it allows pixels to remain in GPU memory throughout the process. Fixes performance regression on https://playbiolab.com/ introduced by switching to GPU-backend for canvas.
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static NonnullRefPtr<ImmutableBitmap> create_snapshot_from_painting_surface(NonnullRefPtr<PaintingSurface>);
LibGfx+LibWeb: Add ImmutableBitmap for images bitmap caching in painter Before this change, we used Gfx::Bitmap to represent both decoded images that are not going to be mutated and bitmaps corresponding to canvases that could be mutated. This change introduces a wrapper for bitmaps that are not going to be mutated, so the painter could do caching: texture caching in the case of GPU painter and potentially scaled bitmap caching in the case of CPU painter.
2023-11-24 14:45:45 +01:00
LibGfx+LibWeb: Cache SkImage in ImmutableBitmap By caching the SkImage that is reused across repaints, we allow Skia t optimize GPU texture caching. ImmutableBitmap is chosen to own the SkImage because it guarantees that the underlying pixels cannot be modified. This is not the case for Gfx::Bitmap, where invalidating the SkImage would be challenging since it exposes pointers to underlying data through methods like scanline().
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~ImmutableBitmap();
int width() const;
int height() const;
IntRect rect() const;
IntSize size() const;
Gfx::AlphaType alpha_type() const;
LibGfx+LibWeb: Add ImmutableBitmap for images bitmap caching in painter Before this change, we used Gfx::Bitmap to represent both decoded images that are not going to be mutated and bitmaps corresponding to canvases that could be mutated. This change introduces a wrapper for bitmaps that are not going to be mutated, so the painter could do caching: texture caching in the case of GPU painter and potentially scaled bitmap caching in the case of CPU painter.
2023-11-24 14:45:45 +01:00
LibGfx+LibWeb: Cache SkImage in ImmutableBitmap By caching the SkImage that is reused across repaints, we allow Skia t optimize GPU texture caching. ImmutableBitmap is chosen to own the SkImage because it guarantees that the underlying pixels cannot be modified. This is not the case for Gfx::Bitmap, where invalidating the SkImage would be challenging since it exposes pointers to underlying data through methods like scanline().
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SkImage const* sk_image() const;
LibGfx+LibWeb: Add ImmutableBitmap for images bitmap caching in painter Before this change, we used Gfx::Bitmap to represent both decoded images that are not going to be mutated and bitmaps corresponding to canvases that could be mutated. This change introduces a wrapper for bitmaps that are not going to be mutated, so the painter could do caching: texture caching in the case of GPU painter and potentially scaled bitmap caching in the case of CPU painter.
2023-11-24 14:45:45 +01:00
LibGfx+LibWeb: Cache SkImage in ImmutableBitmap By caching the SkImage that is reused across repaints, we allow Skia t optimize GPU texture caching. ImmutableBitmap is chosen to own the SkImage because it guarantees that the underlying pixels cannot be modified. This is not the case for Gfx::Bitmap, where invalidating the SkImage would be challenging since it exposes pointers to underlying data through methods like scanline().
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Color get_pixel(int x, int y) const;
LibGfx+LibWeb: Add ImmutableBitmap for images bitmap caching in painter Before this change, we used Gfx::Bitmap to represent both decoded images that are not going to be mutated and bitmaps corresponding to canvases that could be mutated. This change introduces a wrapper for bitmaps that are not going to be mutated, so the painter could do caching: texture caching in the case of GPU painter and potentially scaled bitmap caching in the case of CPU painter.
2023-11-24 14:45:45 +01:00
LibGfx+LibWeb: Cache SkImage in ImmutableBitmap By caching the SkImage that is reused across repaints, we allow Skia t optimize GPU texture caching. ImmutableBitmap is chosen to own the SkImage because it guarantees that the underlying pixels cannot be modified. This is not the case for Gfx::Bitmap, where invalidating the SkImage would be challenging since it exposes pointers to underlying data through methods like scanline().
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RefPtr<Bitmap const> bitmap() const;
LibGfx+LibWeb: Add ImmutableBitmap for images bitmap caching in painter Before this change, we used Gfx::Bitmap to represent both decoded images that are not going to be mutated and bitmaps corresponding to canvases that could be mutated. This change introduces a wrapper for bitmaps that are not going to be mutated, so the painter could do caching: texture caching in the case of GPU painter and potentially scaled bitmap caching in the case of CPU painter.
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private:
LibGfx+LibWeb: Cache SkImage in ImmutableBitmap By caching the SkImage that is reused across repaints, we allow Skia t optimize GPU texture caching. ImmutableBitmap is chosen to own the SkImage because it guarantees that the underlying pixels cannot be modified. This is not the case for Gfx::Bitmap, where invalidating the SkImage would be challenging since it exposes pointers to underlying data through methods like scanline().
2024-11-09 05:48:17 +01:00
NonnullOwnPtr<ImmutableBitmapImpl> m_impl;
LibGfx+LibWeb: Add ImmutableBitmap for images bitmap caching in painter Before this change, we used Gfx::Bitmap to represent both decoded images that are not going to be mutated and bitmaps corresponding to canvases that could be mutated. This change introduces a wrapper for bitmaps that are not going to be mutated, so the painter could do caching: texture caching in the case of GPU painter and potentially scaled bitmap caching in the case of CPU painter.
2023-11-24 14:45:45 +01:00
LibGfx+LibWeb: Cache SkImage in ImmutableBitmap By caching the SkImage that is reused across repaints, we allow Skia t optimize GPU texture caching. ImmutableBitmap is chosen to own the SkImage because it guarantees that the underlying pixels cannot be modified. This is not the case for Gfx::Bitmap, where invalidating the SkImage would be challenging since it exposes pointers to underlying data through methods like scanline().
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explicit ImmutableBitmap(NonnullOwnPtr<ImmutableBitmapImpl> bitmap);
LibGfx+LibWeb: Add ImmutableBitmap for images bitmap caching in painter Before this change, we used Gfx::Bitmap to represent both decoded images that are not going to be mutated and bitmaps corresponding to canvases that could be mutated. This change introduces a wrapper for bitmaps that are not going to be mutated, so the painter could do caching: texture caching in the case of GPU painter and potentially scaled bitmap caching in the case of CPU painter.
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};
}
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