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got harfbuzz working (need to fixup the text size measuring)

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Edward R. Gonzalez
2024-07-01 19:37:29 -04:00
parent baa8024278
commit b409063906
4 changed files with 12 additions and 8 deletions
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11
vefontcache/shaper.odin
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@@ -91,6 +91,7 @@ shaper_shape_from_text :: proc( ctx : ^ShaperContext, info : ^ShaperInfo, output
harfbuzz.buffer_set_language( buffer, harfbuzz.language_get_default() )
// Perform the actual shaping of this run using HarfBuzz.
harfbuzz.buffer_set_content_type( buffer, harfbuzz.Buffer_Content_Type.UNICODE )
harfbuzz.shape( font, buffer, nil, 0 )
// Loop over glyphs and append to output buffer.
@@ -141,21 +142,23 @@ shaper_shape_from_text :: proc( ctx : ^ShaperContext, info : ^ShaperInfo, output
for codepoint, byte_offset in text_utf8
{
script := harfbuzz.unicode_script( hb_ucfunc, cast(harfbuzz.Codepoint) codepoint )
hb_codepoint := cast(harfbuzz.Codepoint) codepoint
script := harfbuzz.unicode_script( hb_ucfunc, hb_codepoint )
// Can we continue the current run?
ScriptKind :: harfbuzz.Script
special_script : b32 = script == ScriptKind.UNKNOWN || script == ScriptKind.INHERITED || script == ScriptKind.COMMON
if special_script || script == current_script {
harfbuzz.buffer_add( ctx.hb_buffer, cast(harfbuzz.Codepoint) codepoint, codepoint == '\n' ? 1 : 0 )
if special_script || script == current_script || byte_offset == 0 {
harfbuzz.buffer_add( ctx.hb_buffer, hb_codepoint, codepoint == '\n' ? 1 : 0 )
current_script = special_script ? current_script : script
continue
}
// End current run since we've encountered a script change.
shape_run( ctx.hb_buffer, current_script, info.font, output, & position, & vertical_position, ascent, descent, line_gap, size, size_scale )
harfbuzz.buffer_add( ctx.hb_buffer, cast(harfbuzz.Codepoint) codepoint, codepoint == '\n' ? 1 : 0 )
harfbuzz.buffer_add( ctx.hb_buffer, hb_codepoint, codepoint == '\n' ? 1 : 0 )
current_script = script
}