1 // Copyright 2003 Adam Megacz, see the COPYING file for licensing [GPL]
3 #include <freetype/freetype.h>
5 /* NOTE: _user_info is defined in crt0.c. It points to a 4096 byte
6 block of memory that contains 1024 32-bit values that can be set
7 with the setUserInfo() method of MIPSEmu.
9 The VM will pause after initialization. When unpaused, it expects
12 user_info[0] = ptr to font byte stream in memory
13 user_info[1] = length of font stream
14 user_info[2] = unicode index of first glyph to render
15 user_info[3] = unicode index of last glyph to render
16 user_info[4] = point size to render in
18 The VM will then iterate over the requested glyphs, performing the
19 following actions for each glyph:
22 - store the address of the glyph bitmap in user_info[5]
23 - store the width of the glyph bitmap in user_info[6]
24 - store the height of the glyph bitmap in user_info[7]
25 - store the font's ascender into user_info[8]
26 - store the font's height into user_info[9]
27 - store the glyph's ascender into user_info[10]
28 - store the glyph's advance into user_info[11]
30 The VM will then pause after each glyph. The VM should not be
31 unpaused after the last glyph until the next glyph set has been
32 configured in user_info (ie it does not pause twice).
36 extern char **_user_info;
38 FT_Library library; /* handle to library */
39 FT_Face face; /* handle to face object */
41 #define FT_Check(expr) do { \
43 fprintf(stderr, #expr " failed\n"); \
48 #define max(a, b) ((a) > (b) ? (a) : (b))
49 #define min(a, b) ((a) < (b) ? (a) : (b))
51 extern void emu_pause();
53 int main(int argc, char** argv) {
58 FT_Check(FT_Init_FreeType(&library));
59 FT_Check(FT_New_Memory_Face(library, _user_info[0], (int)_user_info[1], 0, &face));
64 FT_Check(FT_Set_Char_Size(face, 0, ((int)_user_info[4]) * 64, 72, 72));
65 for(charcode = (int)_user_info[2]; charcode <= (int)_user_info[3]; charcode++) {
67 glyph_index = FT_Get_Char_Index(face, charcode);
68 FT_Check(FT_Load_Glyph(face, glyph_index, FT_LOAD_DEFAULT | FT_LOAD_FORCE_AUTOHINT));
69 FT_Check(FT_Render_Glyph(face->glyph, FT_RENDER_MODE_NORMAL));
71 _user_info[5] = (char*)face->glyph->bitmap.buffer;
72 _user_info[6] = (char*)face->glyph->bitmap.width;
73 _user_info[7] = (char*)face->glyph->bitmap.rows;
74 _user_info[8] = (char*)(face->size->metrics.ascender >> 6);
75 _user_info[9] = (char*)((-1 * face->size->metrics.descender) >> 6);
76 _user_info[10] = (char*)(face->glyph->metrics.horiBearingY >> 6);
77 _user_info[11] = (char*)(face->glyph->advance.x >> 6);
84 // Kerning code; add back in later
86 if (old_glyph_index != -1) {
87 if (FT_HAS_KERNING(face)) {
88 FT_Check(FT_Get_Kerning(face, old_glyph_index, glyph_index, 0, &kerning));
91 x += face->glyph->advance.x >> 6;
94 old_glyph_index = glyph_index;