big chungus

* fix a heap corruption bug
* add qemu support
* add an ATA driver
* add an USTAR read-only file system
* boot from disk instead of floppy
* font rendering
* image rendering
* PCI enumeration
* init script

3 files changed, 55 insertions, 0 deletions

diff --git a/util/ttf2cuddlefont/.gitignore b/util/ttf2cuddlefont/.gitignore
new file mode 100644
index 0000000..1423b0e
--- /dev/null
+++ b/util/ttf2cuddlefont/.gitignore
@@ -0,0 +1 @@
+ttf2cuddlefont
diff --git a/util/ttf2cuddlefont/Makefile b/util/ttf2cuddlefont/Makefile
new file mode 100644
index 0000000..82b54cf
--- /dev/null
+++ b/util/ttf2cuddlefont/Makefile
@@ -0,0 +1,2 @@
+ttf2cuddlefont: main.c
+	gcc $$(pkg-config --cflags --libs freetype2) -Wall -Wextra main.c -o ttf2cuddlefont
diff --git a/util/ttf2cuddlefont/main.c b/util/ttf2cuddlefont/main.c
new file mode 100644
index 0000000..764dec9
--- /dev/null
+++ b/util/ttf2cuddlefont/main.c
@@ -0,0 +1,52 @@
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <ft2build.h>
+#include FT_FREETYPE_H
+
+#define MAX(a, b) ((a) > (b) ? (a) : (b))
+
+static inline unsigned char bitreverse(unsigned char b) {
+	b = (b & 0b11110000) >> 4 | (b & 0b00001111) << 4;
+	b = (b & 0b11001100) >> 2 | (b & 0b00110011) << 2;
+	b = (b & 0b10101010) >> 1 | (b & 0b01010101) << 1;
+	return b;
+}
+
+int main(int argc, char *argv[])
+{
+#define TRY(expr, ...) if (!(expr)) \
+	{ fprintf(stderr, "%s: ", argv[0]); fprintf(stderr, __VA_ARGS__); return EXIT_FAILURE; }
+
+	TRY(argc == 2, "usage: %s infile.ttf > outfile.cuddlefont\n", argv[0]);
+
+	FT_Library lib;
+	TRY(FT_Init_FreeType(&lib) == 0, "failed to initialize freetype\n");
+
+	FT_Face face;
+	TRY(FT_New_Face(lib, argv[1], 0, &face) == 0, "failed to load %s\n", argv[1]);
+	// TRY(FT_Set_Pixel_Sizes(face, 0, 16) == 0, "failed to select pixel size of 8x16\n");
+
+	for (int i = 0;; i++) {
+		TRY(i != face->num_fixed_sizes, "no  8x16 size available\n");
+
+		if (face->available_sizes[i].height == 16 &&
+			face->available_sizes[i].width == 8) {
+			TRY(FT_Select_Size(face, i) == 0, "failed to select font size");
+			break;
+		}
+	}
+
+	assert(bitreverse(0b10000000) == 0b00000001);
+
+	for (int i = 0; i < 256; i++) {
+		TRY(FT_Load_Glyph(face, FT_Get_Char_Index(face, i), FT_LOAD_DEFAULT) == 0,
+			"failed to load glyph %d\n", i);
+
+		TRY(FT_Render_Glyph(face->glyph, FT_RENDER_MODE_MONO) == 0,
+			"failed to render glyph %d\n", i);
+
+		for (unsigned int y = 0; y < 16; y++)
+			putchar(bitreverse(face->glyph->bitmap.buffer[y * face->glyph->bitmap.pitch]));
+	}
+}