mirror of
https://github.com/RGBCube/serenity
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13e9947b4b
In case of possible framebuffer mapping overflow, just fallback to the safe mode-setting of the DisplayConnector, because in that state we know for sure that we can map a usable framebuffer (otherwise it is a bug in the Kernel, and not WindowServer).
53 lines
1.6 KiB
C++
53 lines
1.6 KiB
C++
/*
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* Copyright (c) 2022, kleines Filmröllchen <filmroellchen@serenityos.org>
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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 "ScreenLayout.h"
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#include <AK/Error.h>
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#include <AK/Span.h>
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#include <LibGfx/Color.h>
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#include <sys/ioctl_numbers.h>
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namespace WindowServer {
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// Handles low-level device interfacing for the screen.
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// ScreenBackend is a thin transparent wrapper around framebuffer-related data which is responsible for setting up this data,
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// tearing it down, changing its properties like size, and performing flushes.
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// The screen is intended to directly access the members to perform its function, but it only ever reads from anything
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// except the data in the framebuffer memory.
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class ScreenBackend {
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public:
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virtual ~ScreenBackend() = default;
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virtual ErrorOr<void> open() = 0;
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virtual void set_head_buffer(int index) = 0;
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virtual ErrorOr<void> flush_framebuffer_rects(int buffer_index, Span<FBRect const> rects) = 0;
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virtual ErrorOr<void> unmap_framebuffer() = 0;
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virtual ErrorOr<void> map_framebuffer() = 0;
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virtual ErrorOr<void> flush_framebuffer() = 0;
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virtual ErrorOr<void> set_head_mode_setting(GraphicsHeadModeSetting) = 0;
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virtual ErrorOr<void> set_safe_head_mode_setting() = 0;
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virtual ErrorOr<GraphicsHeadModeSetting> get_head_mode_setting() = 0;
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bool m_can_device_flush_buffers { true };
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bool m_can_device_flush_entire_framebuffer { true };
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bool m_can_set_head_buffer { false };
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Gfx::ARGB32* m_framebuffer { nullptr };
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size_t m_size_in_bytes { 0 };
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size_t m_max_size_in_bytes { 0 };
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size_t m_back_buffer_offset { 0 };
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int m_pitch { 0 };
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};
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}
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