292 lines
6.8 KiB
C++
292 lines
6.8 KiB
C++
#include <kernel/IO.h>
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#include <kernel/kmalloc.h>
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#include <kernel/multiboot.h>
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#include <kernel/Paging.h>
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#include <kernel/panic.h>
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#include <kernel/Serial.h>
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#include <kernel/VESA.h>
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#include "font.h"
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#include <string.h>
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#define MULTIBOOT_FLAGS_FRAMEBUFFER (1 << 12)
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#define MULTIBOOT_FRAMEBUFFER_TYPE_GRAPHICS 1
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#define MULTIBOOT_FRAMEBUFFER_TYPE_TEXT 2
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extern multiboot_info_t* s_multiboot_info;
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extern const struct bitmap_font font;
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namespace VESA
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{
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static uintptr_t s_addr = 0;
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static uint8_t s_bpp = 0;
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static uint32_t s_pitch = 0;
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static uint32_t s_width = 0;
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static uint32_t s_height = 0;
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static uint8_t s_mode = 0;
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static uint32_t s_terminal_width = 0;
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static uint32_t s_terminal_height = 0;
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static void (*PutCharAtImpl)(uint16_t, uint32_t, uint32_t, Color, Color) = nullptr;
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static void (*ClearImpl)(Color) = nullptr;
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static void (*SetCursorPositionImpl)(uint32_t, uint32_t, Color) = nullptr;
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static void GraphicsPutCharAt(uint16_t ch, uint32_t x, uint32_t y, Color fg, Color bg);
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static void GraphicsClear(Color color);
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static void GraphicsSetCursorPosition(uint32_t x, uint32_t y, Color fg);
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static void TextPutCharAt(uint16_t ch, uint32_t x, uint32_t y, Color fg, Color bg);
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static void TextClear(Color color);
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static void TextSetCursorPosition(uint32_t x, uint32_t y, Color fg);
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void PutCharAt(uint16_t ch, uint32_t x, uint32_t y, Color fg, Color bg)
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{
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if (x >= s_width || y >= s_height)
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return;
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PutCharAtImpl(ch, x, y, fg, bg);
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}
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void Clear(Color color)
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{
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ClearImpl(color);
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}
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void SetCursorPosition(uint32_t x, uint32_t y, Color fg)
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{
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SetCursorPositionImpl(x, y, fg);
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}
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uint32_t GetTerminalWidth()
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{
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return s_terminal_width;
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}
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uint32_t GetTerminalHeight()
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{
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return s_terminal_height;
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}
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bool Initialize()
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{
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if (!(s_multiboot_info->flags & MULTIBOOT_FLAGS_FRAMEBUFFER))
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return false;
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auto& framebuffer = s_multiboot_info->framebuffer;
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s_addr = framebuffer.addr;
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s_bpp = framebuffer.bpp;
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s_pitch = framebuffer.pitch;
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s_width = framebuffer.width;
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s_height = framebuffer.height;
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s_mode = framebuffer.type;
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Paging::MapFramebuffer(framebuffer.addr & 0xFFC00000);
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if (s_mode == MULTIBOOT_FRAMEBUFFER_TYPE_GRAPHICS)
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{
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if (s_bpp != 24 && s_bpp != 32)
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{
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dprintln("Unsupported bpp {}", s_bpp);
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return false;
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}
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dprintln("Graphics Mode {}x{} ({} bpp)", s_width, s_height, s_bpp);
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PutCharAtImpl = GraphicsPutCharAt;
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ClearImpl = GraphicsClear;
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SetCursorPositionImpl = GraphicsSetCursorPosition;
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s_terminal_width = s_width / font.Width;
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s_terminal_height = s_height / font.Height;
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}
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else if (s_mode == MULTIBOOT_FRAMEBUFFER_TYPE_TEXT)
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{
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dprintln("Text Mode {}x{}", s_width, s_height);
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PutCharAtImpl = TextPutCharAt;
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ClearImpl = TextClear;
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SetCursorPositionImpl = TextSetCursorPosition;
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s_terminal_width = s_width;
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s_terminal_height = s_height;
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}
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else
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{
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dprintln("Unsupported type for VESA framebuffer");
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return false;
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}
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SetCursorPositionImpl(0, 0, Color::BRIGHT_WHITE);
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ClearImpl(Color::BLACK);
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return true;
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}
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static uint32_t s_graphics_colors[]
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{
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0x00'00'00'00,
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0x00'00'00'AA,
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0x00'00'AA'00,
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0x00'00'AA'AA,
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0x00'AA'00'00,
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0x00'AA'00'AA,
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0x00'AA'55'00,
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0x00'AA'AA'AA,
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0x00'55'55'55,
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0x00'55'55'FF,
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0x00'55'FF'55,
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0x00'55'FF'FF,
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0x00'FF'55'55,
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0x00'FF'55'FF,
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0x00'FF'FF'55,
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0x00'FF'FF'FF,
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};
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static void GraphicsSetPixel(uint32_t offset, uint32_t color)
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{
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uint32_t* address = (uint32_t*)(s_addr + offset);
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switch (s_bpp)
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{
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case 24:
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*address = (*address & 0xFF000000) | (color & 0x00FFFFFF);
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break;
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case 32:
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*address = color;
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break;
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}
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}
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static void GraphicsPutCharAt(uint16_t ch, uint32_t x, uint32_t y, Color fg, Color bg)
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{
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// find correct bitmap
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uint32_t index = 0;
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for (uint32_t i = 0; i < font.Chars; i++)
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{
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if (font.Index[i] == ch)
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{
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index = i;
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break;
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}
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}
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const unsigned char* glyph = font.Bitmap + index * font.Height;
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uint32_t u32_fg = s_graphics_colors[(uint8_t)fg];
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uint32_t u32_bg = s_graphics_colors[(uint8_t)bg];
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uint32_t fx = x * font.Width;
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uint32_t fy = y * font.Height;
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uint32_t row_offset = (fy * s_pitch) + (fx * (s_bpp / 8));
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for (uint32_t gy = 0; gy < font.Height; gy++)
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{
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uint32_t pixel_offset = row_offset;
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for (uint32_t gx = 0; gx < font.Width; gx++)
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{
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GraphicsSetPixel(pixel_offset, (glyph[gy] & (1 << (font.Width - gx - 1))) ? u32_fg : u32_bg);
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pixel_offset += s_bpp / 8;
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}
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row_offset += s_pitch;
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}
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}
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static void GraphicsClear(Color color)
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{
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uint32_t u32_color = s_graphics_colors[(uint8_t)color];
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if (s_bpp == 32)
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{
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uint32_t bytes_per_row = s_pitch / 4;
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for (uint32_t y = 0; y < s_height; y++)
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for (uint32_t x = 0; x < s_width; x++)
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((uint32_t*)s_addr)[y * bytes_per_row + x] = u32_color;
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return;
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}
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uint32_t row_offset = 0;
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for (uint32_t y = 0; y < s_height; y++)
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{
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uint32_t pixel_offset = row_offset;
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for (uint32_t x = 0; x < s_width; x++)
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{
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GraphicsSetPixel(pixel_offset, u32_color);
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pixel_offset += s_bpp / 8;
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}
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row_offset += s_pitch;
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}
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}
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static void GraphicsSetCursorPosition(uint32_t x, uint32_t y, Color fg)
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{
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if (font.Width == 8 && font.Height == 16)
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{
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uint8_t cursor[] = {
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________,
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________,
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________,
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________,
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________,
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________,
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________,
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________,
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________,
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________,
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________,
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________,
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________,
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XXXXXXXX,
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XXXXXXXX,
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________,
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};
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uint32_t u32_fg = s_graphics_colors[(uint8_t)fg];
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uint32_t fx = x * font.Width;
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uint32_t fy = y * font.Height;
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uint32_t row_offset = (fy * s_pitch) + (fx * (s_bpp / 8));
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for (uint32_t gy = 0; gy < font.Height; gy++)
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{
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uint32_t pixel_offset = row_offset;
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for (uint32_t gx = 0; gx < font.Width; gx++)
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{
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if (cursor[gy] & (1 << (font.Width - gx - 1)))
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GraphicsSetPixel(pixel_offset, u32_fg);
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pixel_offset += s_bpp / 8;
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}
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row_offset += s_pitch;
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}
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}
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}
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static inline uint8_t TextColor(Color fg, Color bg)
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{
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return (((uint8_t)bg & 0x0F) << 4) | ((uint8_t)fg & 0x0F);
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}
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static inline uint16_t TextEntry(uint8_t ch, uint8_t color)
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{
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return ((uint16_t)color << 8) | ch;
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}
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static void TextPutCharAt(uint16_t ch, uint32_t x, uint32_t y, Color fg, Color bg)
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{
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uint32_t index = y * s_pitch + x;
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((uint16_t*)s_addr)[index] = TextEntry(ch, TextColor(fg, bg));
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}
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static void TextClear(Color color)
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{
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for (uint32_t y = 0; y < s_height; y++)
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for (uint32_t x = 0; x < s_width; x++)
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TextPutCharAt(' ', x, y, Color::BRIGHT_WHITE, color);
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}
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static void TextSetCursorPosition(uint32_t x, uint32_t y, Color)
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{
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uint16_t position = y * s_width + x;
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IO::outb(0x3D4, 0x0F);
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IO::outb(0x3D5, (uint8_t) (position & 0xFF));
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IO::outb(0x3D4, 0x0E);
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IO::outb(0x3D5, (uint8_t) ((position >> 8) & 0xFF));
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}
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} |