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This enabled WebGL on Linux. It uses ANGLE's OpenGL backend running atop EGL_PLATFORM_SURFACELESS_MESA. Eventually we should probably switch to the Vulkan backend but that doesn't seem to be enabled in the vcpkg angle package. Anyway, switching later should be trivial. The painting surface is allocated through Vulkan and then imported into EGL as a dma-buf. The DRM format modifier mechanism, along with Vulkan initializing the image with VK_IMAGE_LAYOUT_GENERAL, should ensure surface compatibility across the two APIs. For now, we will synchronize rendering and presentation using glFinish, although this is admittedly suboptimal. Really we should grab an EGLSync, export that to an fd, import it into Skia and have it wait for it before reading from the image. That can be implemented in a future change, though.
57 lines
1.3 KiB
C++
57 lines
1.3 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 <LibGfx/Forward.h>
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#include <LibGfx/Size.h>
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namespace Web::WebGL {
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class OpenGLContext {
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public:
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enum class WebGLVersion {
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WebGL1,
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WebGL2,
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};
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static OwnPtr<OpenGLContext> create(NonnullRefPtr<Gfx::SkiaBackendContext>, WebGLVersion);
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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);
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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_extensions();
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void request_extension(char const* extension_name);
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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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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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void free_surface_resources();
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};
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}
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