feat: add multiboot2 framebuffer and Forth pixel primitives
Co-authored-by: aider (openrouter/moonshotai/kimi-k2.6) <aider@aider.chat>
This commit is contained in:
@@ -3,7 +3,7 @@ CFLAGS = -Wall -Wextra -g -std=c11
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COMMON_SRCS = forth_core.c forth_dict.c forth_words.c forth_interp.c main.c
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LINUX_SRCS = $(COMMON_SRCS) platform_linux.c
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KERNEL_SRCS = $(COMMON_SRCS) platform_kernel.c kernel_entry.S
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KERNEL_SRCS = $(COMMON_SRCS) platform_kernel.c kernel_entry.S font8x8.c
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KERNEL_LD = kernel.ld
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TARGET = forth
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@@ -0,0 +1,100 @@
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#include <stdint.h>
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const uint8_t font8x8[96][8] = {
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{0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00}, /* 32 ' ' */
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{0x18,0x18,0x18,0x18,0x18,0x00,0x18,0x00}, /* 33 '!' */
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{0x66,0x66,0x66,0x00,0x00,0x00,0x00,0x00}, /* 34 '"' */
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{0x66,0x66,0xFF,0x66,0xFF,0x66,0x66,0x00}, /* 35 '#' */
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{0x18,0x3E,0x60,0x3C,0x06,0x7C,0x18,0x00}, /* 36 '$' */
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{0x62,0x66,0x0C,0x18,0x30,0x66,0x46,0x00}, /* 37 '%' */
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{0x3C,0x66,0x3C,0x38,0x67,0x66,0x3F,0x00}, /* 38 '&' */
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{0x06,0x0C,0x18,0x00,0x00,0x00,0x00,0x00}, /* 39 ''' */
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{0x0C,0x18,0x30,0x30,0x30,0x18,0x0C,0x00}, /* 40 '(' */
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{0x30,0x18,0x0C,0x0C,0x0C,0x18,0x30,0x00}, /* 41 ')' */
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{0x00,0x66,0x3C,0xFF,0x3C,0x66,0x00,0x00}, /* 42 '*' */
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{0x00,0x18,0x18,0x7E,0x18,0x18,0x00,0x00}, /* 43 '+' */
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{0x00,0x00,0x00,0x00,0x00,0x18,0x18,0x30}, /* 44 ',' */
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{0x00,0x00,0x00,0x7E,0x00,0x00,0x00,0x00}, /* 45 '-' */
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{0x00,0x00,0x00,0x00,0x00,0x18,0x18,0x00}, /* 46 '.' */
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{0x00,0x03,0x06,0x0C,0x18,0x30,0x60,0x00}, /* 47 '/' */
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{0x3C,0x66,0x6E,0x76,0x66,0x66,0x3C,0x00}, /* 48 '0' */
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{0x18,0x18,0x38,0x18,0x18,0x18,0x7E,0x00}, /* 49 '1' */
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{0x3C,0x66,0x06,0x0C,0x30,0x60,0x7E,0x00}, /* 50 '2' */
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{0x3C,0x66,0x06,0x1C,0x06,0x66,0x3C,0x00}, /* 51 '3' */
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{0x06,0x0E,0x1E,0x66,0x7F,0x06,0x06,0x00}, /* 52 '4' */
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{0x7E,0x60,0x7C,0x06,0x06,0x66,0x3C,0x00}, /* 53 '5' */
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{0x3C,0x60,0x60,0x7C,0x66,0x66,0x3C,0x00}, /* 54 '6' */
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{0x7E,0x06,0x0C,0x18,0x30,0x30,0x30,0x00}, /* 55 '7' */
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{0x3C,0x66,0x66,0x3C,0x66,0x66,0x3C,0x00}, /* 56 '8' */
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{0x3C,0x66,0x66,0x3E,0x06,0x06,0x3C,0x00}, /* 57 '9' */
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{0x00,0x00,0x18,0x00,0x00,0x18,0x00,0x00}, /* 58 ':' */
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{0x00,0x00,0x18,0x00,0x00,0x18,0x18,0x30}, /* 59 ';' */
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{0x0C,0x18,0x30,0x60,0x30,0x18,0x0C,0x00}, /* 60 '<' */
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{0x00,0x00,0x7E,0x00,0x7E,0x00,0x00,0x00}, /* 61 '=' */
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{0x30,0x18,0x0C,0x06,0x0C,0x18,0x30,0x00}, /* 62 '>' */
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{0x3C,0x66,0x06,0x0C,0x18,0x00,0x18,0x00}, /* 63 '?' */
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{0x3C,0x66,0x6E,0x6E,0x60,0x62,0x3C,0x00}, /* 64 '@' */
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{0x18,0x3C,0x66,0x7E,0x66,0x66,0x66,0x00}, /* 65 'A' */
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{0x7C,0x66,0x66,0x7C,0x66,0x66,0x7C,0x00}, /* 66 'B' */
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{0x3C,0x66,0x60,0x60,0x60,0x66,0x3C,0x00}, /* 67 'C' */
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{0x78,0x6C,0x66,0x66,0x66,0x6C,0x78,0x00}, /* 68 'D' */
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{0x7E,0x60,0x60,0x78,0x60,0x60,0x7E,0x00}, /* 69 'E' */
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{0x7E,0x60,0x60,0x78,0x60,0x60,0x60,0x00}, /* 70 'F' */
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{0x3C,0x66,0x60,0x6E,0x66,0x66,0x3C,0x00}, /* 71 'G' */
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{0x66,0x66,0x66,0x7E,0x66,0x66,0x66,0x00}, /* 72 'H' */
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{0x3C,0x18,0x18,0x18,0x18,0x18,0x3C,0x00}, /* 73 'I' */
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{0x1E,0x0C,0x0C,0x0C,0x0C,0x6C,0x38,0x00}, /* 74 'J' */
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{0x66,0x6C,0x78,0x70,0x78,0x6C,0x66,0x00}, /* 75 'K' */
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{0x60,0x60,0x60,0x60,0x60,0x60,0x7E,0x00}, /* 76 'L' */
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{0x63,0x77,0x7F,0x6B,0x63,0x63,0x63,0x00}, /* 77 'M' */
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{0x66,0x76,0x7E,0x7E,0x6E,0x66,0x66,0x00}, /* 78 'N' */
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{0x3C,0x66,0x66,0x66,0x66,0x66,0x3C,0x00}, /* 79 'O' */
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{0x7C,0x66,0x66,0x7C,0x60,0x60,0x60,0x00}, /* 80 'P' */
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{0x3C,0x66,0x66,0x66,0x66,0x3C,0x0E,0x00}, /* 81 'Q' */
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{0x7C,0x66,0x66,0x7C,0x78,0x6C,0x66,0x00}, /* 82 'R' */
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{0x3C,0x66,0x60,0x3C,0x06,0x66,0x3C,0x00}, /* 83 'S' */
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{0x7E,0x18,0x18,0x18,0x18,0x18,0x18,0x00}, /* 84 'T' */
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{0x66,0x66,0x66,0x66,0x66,0x66,0x3C,0x00}, /* 85 'U' */
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{0x66,0x66,0x66,0x66,0x66,0x3C,0x18,0x00}, /* 86 'V' */
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{0x63,0x63,0x63,0x6B,0x7F,0x77,0x63,0x00}, /* 87 'W' */
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{0x66,0x66,0x3C,0x18,0x3C,0x66,0x66,0x00}, /* 88 'X' */
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{0x66,0x66,0x66,0x3C,0x18,0x18,0x18,0x00}, /* 89 'Y' */
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{0x7E,0x06,0x0C,0x18,0x30,0x60,0x7E,0x00}, /* 90 'Z' */
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{0x3C,0x30,0x30,0x30,0x30,0x30,0x3C,0x00}, /* 91 '[' */
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{0x00,0x60,0x30,0x18,0x0C,0x06,0x03,0x00}, /* 92 '\' */
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{0x3C,0x0C,0x0C,0x0C,0x0C,0x0C,0x3C,0x00}, /* 93 ']' */
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{0x18,0x3C,0x66,0x00,0x00,0x00,0x00,0x00}, /* 94 '^' */
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{0x00,0x00,0x00,0x00,0x00,0x00,0x7E,0x00}, /* 95 '_' */
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{0x18,0x18,0x0C,0x00,0x00,0x00,0x00,0x00}, /* 96 '`' */
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{0x00,0x00,0x3C,0x06,0x3E,0x66,0x3E,0x00}, /* 97 'a' */
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{0x00,0x60,0x60,0x7C,0x66,0x66,0x7C,0x00}, /* 98 'b' */
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{0x00,0x00,0x3C,0x60,0x60,0x60,0x3C,0x00}, /* 99 'c' */
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{0x00,0x06,0x06,0x3E,0x66,0x66,0x3E,0x00}, /* 100 'd' */
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{0x00,0x00,0x3C,0x66,0x7E,0x60,0x3C,0x00}, /* 101 'e' */
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{0x00,0x0E,0x18,0x3E,0x18,0x18,0x18,0x00}, /* 102 'f' */
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{0x00,0x00,0x3E,0x66,0x66,0x3E,0x06,0x7C}, /* 103 'g' */
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{0x00,0x60,0x60,0x7C,0x66,0x66,0x66,0x00}, /* 104 'h' */
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{0x00,0x18,0x00,0x38,0x18,0x18,0x3C,0x00}, /* 105 'i' */
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{0x00,0x06,0x00,0x06,0x06,0x06,0x06,0x3C}, /* 106 'j' */
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{0x00,0x60,0x60,0x6C,0x78,0x6C,0x66,0x00}, /* 107 'k' */
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{0x00,0x38,0x18,0x18,0x18,0x18,0x3C,0x00}, /* 108 'l' */
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{0x00,0x00,0x66,0x7F,0x6B,0x63,0x63,0x00}, /* 109 'm' */
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{0x00,0x00,0x7C,0x66,0x66,0x66,0x66,0x00}, /* 110 'n' */
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{0x00,0x00,0x3C,0x66,0x66,0x66,0x3C,0x00}, /* 111 'o' */
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{0x00,0x00,0x7C,0x66,0x66,0x7C,0x60,0x60}, /* 112 'p' */
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{0x00,0x00,0x3E,0x66,0x66,0x3E,0x06,0x06}, /* 113 'q' */
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{0x00,0x00,0x7C,0x66,0x60,0x60,0x60,0x00}, /* 114 'r' */
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{0x00,0x00,0x3E,0x60,0x3C,0x06,0x7C,0x00}, /* 115 's' */
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{0x00,0x18,0x18,0x7E,0x18,0x18,0x0C,0x00}, /* 116 't' */
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{0x00,0x00,0x66,0x66,0x66,0x66,0x3E,0x00}, /* 117 'u' */
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{0x00,0x00,0x66,0x66,0x66,0x3C,0x18,0x00}, /* 118 'v' */
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{0x00,0x00,0x63,0x6B,0x7F,0x3E,0x36,0x00}, /* 119 'w' */
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{0x00,0x00,0x66,0x3C,0x18,0x3C,0x66,0x00}, /* 120 'x' */
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{0x00,0x00,0x66,0x66,0x66,0x3E,0x0C,0x78}, /* 121 'y' */
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{0x00,0x00,0x7E,0x0C,0x18,0x30,0x7E,0x00}, /* 122 'z' */
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{0x0C,0x18,0x18,0x30,0x18,0x18,0x0C,0x00}, /* 123 '{' */
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{0x18,0x18,0x18,0x18,0x18,0x18,0x18,0x00}, /* 124 '|' */
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{0x30,0x18,0x18,0x0C,0x18,0x18,0x30,0x00}, /* 125 '}' */
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{0x00,0x00,0x66,0x3C,0x00,0x00,0x00,0x00}, /* 126 '~' */
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{0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00}, /* 127 DEL */
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};
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@@ -204,6 +204,14 @@ void do_dot_quote(Word* w);
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void do_dot_quote_inner(Word* w);
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void do_words(Word* w);
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// Framebuffer
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void do_fb_addr(Word* w);
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void do_fb_width(Word* w);
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void do_fb_height(Word* w);
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void do_fb_pitch(Word* w);
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void do_fb_bpp(Word* w);
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void do_fb_plot(Word* w);
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// Memory
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void do_fetch(Word* w);
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void do_store(Word* w);
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@@ -8,6 +8,19 @@ multiboot_header:
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.long multiboot_header_end - multiboot_header
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.long -(0xe85250d6 + 0 + (multiboot_header_end - multiboot_header))
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/* Framebuffer tag: type=5, prefer RGB 32 bpp */
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.align 8
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.word 5
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.word 0
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.long 32
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.quad 0
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.long 0
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.long 0
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.long 32
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.byte 1
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.byte 0
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.word 0
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.align 8
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.word 0
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.word 0
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@@ -28,12 +41,17 @@ stack_bottom:
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.space 16384
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stack_top:
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.align 8
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mboot_info_ptr:
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.space 8
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.section .text
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.code32
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.global _start
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.type _start, @function
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_start:
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movl $stack_top, %esp
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movl %ebx, mboot_info_ptr
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cld
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movl $__bss_start, %edi
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@@ -96,6 +114,7 @@ long_mode_start:
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/* Ensure 16-byte alignment for the System V AMD64 ABI. */
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andq $-16, %rsp
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movq mboot_info_ptr, %rdi
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call kernel_main
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cli
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1:
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@@ -65,6 +65,14 @@ void forth_run(void) {
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add_primitive(".\"", do_dot_quote, F_IMMEDIATE); // immediate
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add_primitive("words", do_words, 0);
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// Framebuffer
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add_primitive("fb-addr", do_fb_addr, 0);
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add_primitive("fb-width", do_fb_width, 0);
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add_primitive("fb-height", do_fb_height, 0);
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add_primitive("fb-pitch", do_fb_pitch, 0);
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add_primitive("fb-bpp", do_fb_bpp, 0);
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add_primitive("fb-plot", do_fb_plot, 0);
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// Memory
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add_primitive("@", do_fetch, 0);
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add_primitive("!", do_store, 0);
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+149
-18
@@ -2,27 +2,102 @@
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#include <stdint.h>
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#include <stdarg.h>
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// VGA text-mode buffer
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static uint16_t* vga_buffer = (uint16_t*)0xB8000;
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static int vga_row = 0;
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static int vga_col = 0;
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extern const uint8_t font8x8[96][8];
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static void vga_putchar(char c) {
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struct mboot_tag {
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uint32_t type;
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uint32_t size;
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};
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struct mboot_tag_framebuffer {
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uint32_t type;
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uint32_t size;
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uint64_t framebuffer_addr;
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uint32_t framebuffer_pitch;
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uint32_t framebuffer_width;
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uint32_t framebuffer_height;
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uint8_t framebuffer_bpp;
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uint8_t framebuffer_type;
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uint16_t reserved;
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};
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static uint64_t fb_addr = 0;
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static uint32_t fb_pitch = 0;
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static uint32_t fb_width = 0;
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static uint32_t fb_height = 0;
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static uint8_t fb_bpp = 0;
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static int fb_cols = 0;
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static int fb_rows = 0;
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static int fb_col = 0;
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static int fb_row = 0;
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static void fb_draw_pixel(int x, int y, uint32_t color) {
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if (x < 0 || y < 0 || (uint32_t)x >= fb_width || (uint32_t)y >= fb_height) return;
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if (!fb_addr) return;
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if (fb_bpp == 32) {
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uint32_t* p = (uint32_t*)(fb_addr + y * fb_pitch + x * 4);
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*p = color;
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} else if (fb_bpp == 24) {
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uint8_t* p = (uint8_t*)(fb_addr + y * fb_pitch + x * 3);
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p[0] = color & 0xFF;
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p[1] = (color >> 8) & 0xFF;
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p[2] = (color >> 16) & 0xFF;
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}
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}
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static void fb_scroll(void) {
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int line_height = 8;
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uint32_t bytes_per_pixel = (fb_bpp + 7) / 8;
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uint32_t copy_bytes = fb_width * bytes_per_pixel;
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for (uint32_t y = 0; y < fb_height - line_height; y++) {
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uint8_t* dst = (uint8_t*)(fb_addr + y * fb_pitch);
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uint8_t* src = (uint8_t*)(fb_addr + (y + line_height) * fb_pitch);
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for (uint32_t i = 0; i < copy_bytes; i++) {
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dst[i] = src[i];
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}
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}
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for (uint32_t y = fb_height - line_height; y < fb_height; y++) {
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uint8_t* row = (uint8_t*)(fb_addr + y * fb_pitch);
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for (uint32_t i = 0; i < copy_bytes; i++) {
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row[i] = 0;
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}
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}
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}
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static void fb_draw_char(char c) {
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if (!fb_addr || fb_cols == 0) return;
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if (c == '\n') {
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vga_col = 0;
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vga_row++;
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fb_col = 0;
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fb_row++;
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} else if (c == '\r') {
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fb_col = 0;
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} else if (c == '\b') {
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if (fb_col > 0) fb_col--;
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} else {
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int idx = vga_row * 80 + vga_col;
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vga_buffer[idx] = (uint16_t)((0x0F << 8) | (unsigned char)c);
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vga_col++;
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if (vga_col >= 80) {
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vga_col = 0;
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vga_row++;
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unsigned char ch = (unsigned char)c;
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if (ch < 32 || ch > 126) ch = '?';
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const uint8_t* glyph = font8x8[ch - 32];
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int start_x = fb_col * 8;
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int start_y = fb_row * 8;
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||||
for (int dy = 0; dy < 8; dy++) {
|
||||
uint8_t row = glyph[dy];
|
||||
for (int dx = 0; dx < 8; dx++) {
|
||||
if (row & (0x80 >> dx)) {
|
||||
fb_draw_pixel(start_x + dx, start_y + dy, 0xFFFFFF);
|
||||
} else {
|
||||
fb_draw_pixel(start_x + dx, start_y + dy, 0x000000);
|
||||
}
|
||||
}
|
||||
if (vga_row >= 25) {
|
||||
vga_row = 0;
|
||||
vga_col = 0;
|
||||
}
|
||||
fb_col++;
|
||||
}
|
||||
if (fb_col >= fb_cols) {
|
||||
fb_col = 0;
|
||||
fb_row++;
|
||||
}
|
||||
if (fb_row >= fb_rows) {
|
||||
fb_scroll();
|
||||
fb_row = fb_rows - 1;
|
||||
}
|
||||
}
|
||||
|
||||
@@ -149,7 +224,7 @@ void keyboard_handler(void) {
|
||||
}
|
||||
|
||||
void forth_putchar(char c) {
|
||||
vga_putchar(c);
|
||||
fb_draw_char(c);
|
||||
while ((inb(0x3F8 + 5) & 0x20) == 0) { }
|
||||
outb(0x3F8, (uint8_t)c);
|
||||
}
|
||||
@@ -239,9 +314,32 @@ void forth_printf(const char* fmt, ...) {
|
||||
va_end(ap);
|
||||
}
|
||||
|
||||
void kernel_main(void) {
|
||||
void kernel_main(uint64_t mboot_ptr) {
|
||||
extern void isr_keyboard(void);
|
||||
|
||||
struct mboot_tag* tag = (struct mboot_tag*)(mboot_ptr + 8);
|
||||
while (tag->type != 0) {
|
||||
if (tag->type == 5) {
|
||||
struct mboot_tag_framebuffer* fb = (struct mboot_tag_framebuffer*)tag;
|
||||
fb_addr = fb->framebuffer_addr;
|
||||
fb_pitch = fb->framebuffer_pitch;
|
||||
fb_width = fb->framebuffer_width;
|
||||
fb_height = fb->framebuffer_height;
|
||||
fb_bpp = fb->framebuffer_bpp;
|
||||
}
|
||||
tag = (struct mboot_tag*)((uint8_t*)tag + ((tag->size + 7) & ~7));
|
||||
}
|
||||
|
||||
if (fb_addr && fb_bpp >= 24) {
|
||||
fb_cols = fb_width / 8;
|
||||
fb_rows = fb_height / 8;
|
||||
for (uint32_t y = 0; y < fb_height; y++) {
|
||||
for (uint32_t x = 0; x < fb_width; x++) {
|
||||
fb_draw_pixel(x, y, 0);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
serial_init();
|
||||
|
||||
idt_set_gate(0x21, (uint64_t)isr_keyboard, 0x08, 0x8E);
|
||||
@@ -260,3 +358,36 @@ void kernel_main(void) {
|
||||
forth_run();
|
||||
forth_panic();
|
||||
}
|
||||
|
||||
void do_fb_addr(Word* w) {
|
||||
(void)w;
|
||||
data_push((int64_t)fb_addr);
|
||||
}
|
||||
|
||||
void do_fb_width(Word* w) {
|
||||
(void)w;
|
||||
data_push((int64_t)fb_width);
|
||||
}
|
||||
|
||||
void do_fb_height(Word* w) {
|
||||
(void)w;
|
||||
data_push((int64_t)fb_height);
|
||||
}
|
||||
|
||||
void do_fb_pitch(Word* w) {
|
||||
(void)w;
|
||||
data_push((int64_t)fb_pitch);
|
||||
}
|
||||
|
||||
void do_fb_bpp(Word* w) {
|
||||
(void)w;
|
||||
data_push((int64_t)fb_bpp);
|
||||
}
|
||||
|
||||
void do_fb_plot(Word* w) {
|
||||
(void)w;
|
||||
int64_t color = data_pop();
|
||||
int64_t y = data_pop();
|
||||
int64_t x = data_pop();
|
||||
fb_draw_pixel((int)x, (int)y, (uint32_t)color);
|
||||
}
|
||||
|
||||
@@ -107,6 +107,13 @@ void forth_printf(const char* fmt, ...) {
|
||||
va_end(ap);
|
||||
}
|
||||
|
||||
void do_fb_addr(Word* w) { (void)w; data_push(0); }
|
||||
void do_fb_width(Word* w) { (void)w; data_push(0); }
|
||||
void do_fb_height(Word* w) { (void)w; data_push(0); }
|
||||
void do_fb_pitch(Word* w) { (void)w; data_push(0); }
|
||||
void do_fb_bpp(Word* w) { (void)w; data_push(0); }
|
||||
void do_fb_plot(Word* w) { (void)w; data_pop(); data_pop(); data_pop(); }
|
||||
|
||||
void _start(void) {
|
||||
forth_run();
|
||||
syscall1(60, 0);
|
||||
|
||||
Reference in New Issue
Block a user