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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).
91 lines
2.4 KiB
C++
91 lines
2.4 KiB
C++
/*
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* Copyright (c) 2018-2020, the SerenityOS developers.
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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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#include "VirtualScreenBackend.h"
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#include "ScreenBackend.h"
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#include <AK/Try.h>
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#include <AK/kmalloc.h>
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#include <LibGfx/Color.h>
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namespace WindowServer {
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VirtualScreenBackend::~VirtualScreenBackend()
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{
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MUST(unmap_framebuffer());
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}
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ErrorOr<void> VirtualScreenBackend::open()
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{
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m_can_device_flush_buffers = true;
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m_can_set_head_buffer = true;
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return {};
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}
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void VirtualScreenBackend::set_head_buffer(int index)
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{
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VERIFY(index <= 1 && index >= 0);
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m_first_buffer_active = index == 0;
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}
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ErrorOr<void> VirtualScreenBackend::set_safe_head_mode_setting()
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{
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return {};
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}
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ErrorOr<void> VirtualScreenBackend::set_head_mode_setting(GraphicsHeadModeSetting mode_setting)
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{
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m_height = mode_setting.vertical_active;
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if (mode_setting.horizontal_stride == 0)
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mode_setting.horizontal_stride = static_cast<int>(mode_setting.horizontal_active * sizeof(Gfx::ARGB32));
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m_pitch = mode_setting.horizontal_stride;
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if (static_cast<int>(mode_setting.horizontal_active * sizeof(Gfx::ARGB32)) != mode_setting.horizontal_stride)
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return Error::from_string_literal("Unsupported pitch");
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m_width = mode_setting.horizontal_active;
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return {};
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}
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ErrorOr<GraphicsHeadModeSetting> VirtualScreenBackend::get_head_mode_setting()
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{
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return GraphicsHeadModeSetting {
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.horizontal_stride = m_pitch,
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.pixel_clock_in_khz = 0,
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.horizontal_active = m_width,
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.horizontal_front_porch_pixels = 0,
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.horizontal_sync_time_pixels = 0,
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.horizontal_blank_pixels = 0,
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.vertical_active = m_height,
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.vertical_front_porch_lines = 0,
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.vertical_sync_time_lines = 0,
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.vertical_blank_lines = 0,
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.horizontal_offset = 0,
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.vertical_offset = 0,
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};
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}
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ErrorOr<void> VirtualScreenBackend::map_framebuffer()
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{
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m_size_in_bytes = static_cast<unsigned long>(m_pitch) * m_height * 2;
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m_framebuffer = new Gfx::ARGB32[static_cast<unsigned long>(m_width) * m_height * 2];
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if (m_framebuffer == nullptr)
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return Error::from_errno(ENOMEM);
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m_back_buffer_offset = m_size_in_bytes / 2;
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m_first_buffer_active = true;
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return {};
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}
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ErrorOr<void> VirtualScreenBackend::unmap_framebuffer()
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{
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delete[] m_framebuffer;
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return {};
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}
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}
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