Alec Murphy
a322c06850
At boot time, we preallocate 32MB of RAM to reuse for all malloc() requests by stbtt_RenderText(), which should be more than enough for the primary use case (browsing web pages).
80 lines
2.3 KiB
HolyC
80 lines
2.3 KiB
HolyC
Silent(1); // This is needed to suppress "Function should return val" warnings for wrappers to non-HolyC functions
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class stbtt__buf {
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U8* data;
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I32 cursor;
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I32 size;
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};
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class stbtt_fontinfo {
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U8* userdata;
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U8* data; // pointer to .ttf file
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I32 fontstart; // offset of start of font
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I32 numGlyphs; // number of glyphs, needed for range checking
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I32 loca, head, glyf, hhea, hmtx, kern, gpos, svg; // table locations as offset from start of .ttf
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I32 index_map; // a cmap mapping for our chosen character encoding
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I32 indexToLocFormat; // format needed to map from glyph index to glyph
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stbtt__buf cff; // cff font data
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stbtt__buf charstrings; // the charstring index
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stbtt__buf gsubrs; // global charstring subroutines index
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stbtt__buf subrs; // private charstring subroutines index
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stbtt__buf fontdicts; // array of font dicts
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stbtt__buf fdselect; // map from glyph to fontdict
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};
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I32 @stbtt_InitFont(stbtt_fontinfo* info, U8* data, I32 offset)
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{
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U64 reg RDI rdi = info;
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U64 reg RSI rsi = data;
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U64 reg RDX rdx = offset;
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no_warn rdi, rsi, rdx;
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asm {
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MOV RAX, STBTT_INITFONT
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CALL RAX
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}
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}
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U8* @stbtt_RenderText(stbtt_fontinfo* info, I32 b_w, I32 b_h, I32 l_h, I32* word, I32* advance = NULL)
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{
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U64 reg RDI rdi = info;
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U64 reg RSI rsi = b_w;
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U64 reg RDX rdx = b_h;
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U64 reg RCX rcx = l_h;
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U64 reg R8 r8 = word;
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U64 reg R9 r9 = advance;
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no_warn rdi, rsi, rdx, rcx, r8, r9;
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stbtt_pos = 0;
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asm {
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MOV RAX, STBTT_RENDERTEXT
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CALL RAX
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}
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}
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I32 @stbtt_GetTextWidth(stbtt_fontinfo* info, I32 l_h, I32* word, I32* advance = NULL)
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{
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U64 reg RDI rdi = info;
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U64 reg RSI rsi = l_h;
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U64 reg RDX rdx = word;
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U64 reg RCX rcx = advance;
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no_warn rdi, rsi, rdx, rcx;
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asm {
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MOV RAX, STBTT_GETTEXTWIDTH
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CALL RAX
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}
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}
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U8* @stbtt_GetFontNameDefault(stbtt_fontinfo* font, I32* length)
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{
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U64 reg RDI rdi = font;
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U64 reg RSI rsi = length;
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no_warn rdi, rsi;
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asm {
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MOV RAX, STBTT_GETFONTNAMEDEFAULT
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CALL RAX
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}
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}
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Silent(0);
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"truetype ";
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