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

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This commit is contained in:
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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6
examples/sokol_demo/sokol_demo.odin
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@@ -271,7 +271,7 @@ init :: proc "c" ()
case .DUMMY: fmt.println(">> using dummy backend")
}
ve.startup( & demo_ctx.ve_ctx, .STB_TrueType, allocator = context.allocator, snap_shape_position = false )
ve.startup( & demo_ctx.ve_ctx, .STB_TrueType, allocator = context.allocator, snap_shape_position = false, use_advanced_text_shaper = true )
ve_sokol.setup_gfx_objects( & demo_ctx.render_ctx, & demo_ctx.ve_ctx, vert_cap = 1024 * 1024, index_cap = 1024 * 1024 )
error : mem.Allocator_Error
@@ -478,10 +478,10 @@ etiam dignissim diam quis enim. Convallis convallis tellus id interdum.`
draw_text_string_pos_norm("그들의 장비와 기구는 모두 살아 있다.", font_demo_korean, 36, {0.3, current_scroll - (section_start + 0.92)}, COLOR_WHITE)
draw_text_string_pos_norm("Arabic", font_print, 19, {0.2, current_scroll - (section_start + 0.96)}, COLOR_WHITE)
draw_text_string_pos_norm("حب السماء لا تمطر غير الأحلام. This one needs HarfBuzz to work!", font_demo_arabic, 24, {0.3, current_scroll - (section_start + 0.96)}, COLOR_WHITE)
draw_text_string_pos_norm("حب السماء لا تمطر غير الأحلام. (This one needs HarfBuzz to work!)", font_demo_arabic, 24, {0.3, current_scroll - (section_start + 0.96)}, COLOR_WHITE)
draw_text_string_pos_norm("Hebrew", font_print, 19, {0.2, current_scroll - (section_start + 1.0)}, COLOR_WHITE)
draw_text_string_pos_norm("אז הגיע הלילה של כוכב השביט הראשון. This one needs HarfBuzz to work!", font_demo_hebrew, 22, {0.3, current_scroll - (section_start + 1.0)}, COLOR_WHITE)
draw_text_string_pos_norm("אז הגיע הלילה של כוכב השביט הראשון. (This one needs HarfBuzz to work!)", font_demo_hebrew, 22, {0.3, current_scroll - (section_start + 1.0)}, COLOR_WHITE)
}
// Zoom Test

2
scripts/build_sokol_demo.ps1
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@@ -98,7 +98,7 @@ function build-SokolBackendDemo
# $build_args += $flag_optimize_minimal
# $build_args += $flag_optimize_speed
$build_args += $falg_optimize_aggressive
# $build_args += $flag_debug
$build_args += $flag_debug
$build_args += $flag_pdb_name + $pdb
$build_args += $flag_subsystem + 'windows'
# $build_args += ($flag_extra_linker_flags + $linker_args )

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
}

1
vefontcache/vefontcache.odin
View File

@@ -152,6 +152,7 @@ startup :: proc( ctx : ^Context, parser_kind : ParserKind,
context.allocator = ctx.backing
snap_shape_pos = snap_shape_position
text_shape_adv = use_advanced_text_shaper
if default_curve_quality == 0 {
default_curve_quality = 3