a80babffb6
Canvas rendering is a major remaining path where WebContent directly owns GPU-facing drawing state. Back 2D and WebGL canvas contexts with remote Compositor transports, so WebContent talks to canvas surfaces through IPC while the Compositor owns the rasterization resources. This is a large step toward GPU sandboxing because canvas GPU work now lives behind the Compositor boundary. It also gives OffscreenCanvas the process-independent canvas plumbing that HTMLCanvasElement now uses, making worker-owned canvases possible without another WebContent-local rendering path.
78 lines
2 KiB
C++
78 lines
2 KiB
C++
/*
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* Copyright (c) 2024, Aliaksandr Kalenik <kalenik.aliaksandr@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/NonnullOwnPtr.h>
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#include <AK/NonnullRefPtr.h>
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#include <AK/OwnPtr.h>
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#include <AK/RefPtr.h>
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#include <AK/Vector.h>
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#include <LibGfx/BitmapExport.h>
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#include <LibGfx/Forward.h>
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#include <LibGfx/Size.h>
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#include <LibWeb/Export.h>
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#include <LibWeb/WebGL/GLFunctions.h>
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namespace Web::WebGL {
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WEB_API Optional<Gfx::ExportFormat> texture_export_format(GLenum format, GLenum type);
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class WEB_API OpenGLContext : public GLFunctions {
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public:
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using WebGLVersion = WebGL::WebGLVersion;
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struct DrawingBufferOptions {
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bool depth;
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bool stencil;
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bool antialias;
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};
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static OwnPtr<OpenGLContext> create(NonnullRefPtr<Gfx::SkiaBackendContext>, WebGLVersion, DrawingBufferOptions);
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void notify_content_will_change();
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void clear_buffer_to_default_values();
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void allocate_painting_surface_if_needed();
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struct Impl;
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OpenGLContext(NonnullRefPtr<Gfx::SkiaBackendContext>, Impl, WebGLVersion, DrawingBufferOptions);
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~OpenGLContext();
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void make_current();
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void present(bool preserve_drawing_buffer);
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void set_size(Gfx::IntSize const&);
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RefPtr<Gfx::PaintingSurface> surface();
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u32 default_framebuffer() const;
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u32 default_renderbuffer() const;
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Vector<String> get_supported_opengl_extensions();
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private:
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NonnullRefPtr<Gfx::SkiaBackendContext> m_skia_backend_context;
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Gfx::IntSize m_size;
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RefPtr<Gfx::PaintingSurface> m_painting_surface;
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#ifdef AK_OS_MACOS
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OwnPtr<Gfx::SharedImageBuffer> m_shared_image_buffer;
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#endif
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NonnullOwnPtr<Impl> m_impl;
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Optional<Vector<String>> m_requestable_extensions;
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WebGLVersion m_webgl_version;
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[[maybe_unused]] DrawingBufferOptions m_drawing_buffer_options;
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void free_surface_resources();
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#if defined(AK_OS_MACOS)
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void allocate_iosurface_painting_surface();
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#elif defined(USE_VULKAN_DMABUF_IMAGES)
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void allocate_vkimage_painting_surface();
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#endif
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};
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}
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