Bananymous
cd6269d406
Only thing this is currently helpful is qemu when booting with -kernel flag as that does not provide framebuffer info in multiboot headers
75 lines
2.5 KiB
C++
75 lines
2.5 KiB
C++
#pragma once
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#include <kernel/Device/Device.h>
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#include <kernel/Memory/VirtualRange.h>
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namespace Kernel
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{
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class BGAController;
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class FramebufferDevice : public CharacterDevice
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{
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public:
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static BAN::ErrorOr<BAN::RefPtr<FramebufferDevice>> create(paddr_t paddr, uint32_t width, uint32_t height, uint32_t pitch, uint8_t bpp);
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static BAN::ErrorOr<BAN::RefPtr<FramebufferDevice>> create(BAN::RefPtr<BGAController>);
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static BAN::ErrorOr<BAN::RefPtr<FramebufferDevice>> create_from_boot_framebuffer();
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static BAN::RefPtr<FramebufferDevice> boot_framebuffer();
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~FramebufferDevice();
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uint32_t width() const { return m_width; }
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uint32_t height() const { return m_height; }
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uint8_t bpp() const { return m_bpp; }
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BAN::ErrorOr<void> set_bga_controller(BAN::RefPtr<BGAController>);
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uint32_t get_pixel(uint32_t x, uint32_t y) const;
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void set_pixel(uint32_t x, uint32_t y, uint32_t rgb);
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void fill(uint32_t rgb);
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// positive rows -> empty pixels on bottom
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// negative rows -> empty pixels on top
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void scroll(int32_t rows, uint32_t rgb);
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void sync_pixels_full();
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void sync_pixels_linear(uint32_t first_pixel, uint32_t pixel_count);
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void sync_pixels_rectangle(uint32_t top_right_x, uint32_t top_right_y, uint32_t width, uint32_t height);
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virtual BAN::ErrorOr<BAN::UniqPtr<MemoryRegion>> mmap_region(PageTable&, off_t offset, size_t len, AddressRange, MemoryRegion::Type, PageTable::flags_t, int status_flags) override;
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virtual BAN::StringView name() const override { return m_name.sv(); }
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protected:
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virtual BAN::ErrorOr<size_t> read_impl(off_t, BAN::ByteSpan) override;
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virtual BAN::ErrorOr<size_t> write_impl(off_t, BAN::ConstByteSpan) override;
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BAN::ErrorOr<long> ioctl_impl(unsigned long request, void* arg) override;
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virtual bool can_read_impl() const override { return true; }
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virtual bool can_write_impl() const override { return true; }
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virtual bool has_error_impl() const override { return false; }
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virtual bool has_hungup_impl() const override { return false; }
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private:
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FramebufferDevice(mode_t mode, uid_t uid, gid_t gid, dev_t rdev, paddr_t paddr, uint32_t width, uint32_t height, uint32_t pitch, uint8_t bpp);
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BAN::ErrorOr<void> initialize();
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private:
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const BAN::String m_name;
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vaddr_t m_video_memory_vaddr { 0 };
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paddr_t m_video_memory_paddr { 0 };
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uint32_t m_width { 0 };
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uint32_t m_height { 0 };
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uint32_t m_pitch { 0 };
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uint8_t m_bpp { 0 };
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BAN::UniqPtr<VirtualRange> m_video_buffer;
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BAN::RefPtr<BGAController> m_bga_controller;
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friend class FramebufferMemoryRegion;
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};
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}
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