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Got zoom implemented on library's side. Still figuring out font size issue

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Edward R. Gonzalez
2025-01-10 20:16:51 -05:00
parent 3b59ac75bf
commit c995af36e7
3 changed files with 198 additions and 205 deletions
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42
vefontcache/shaper.odin
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@@ -16,10 +16,10 @@ Shape_Key :: u32
its position should be used for rendering.
For this library's case it also resolves any content that does not have to be done
on a per-frame basis for draw list generation.
* Resolve atlas lru codes
* Resolve glyph bounds and scale
* Resolve atlas region the glyph is associated with.
on a per-frame basis for draw list generation:
* atlas lru codes
* glyph bounds and scale
* atlas region the glyph is associated with.
Ideally the user should resolve this shape once and cache/store it on their side.
They have the best ability to avoid costly lookups.
@@ -82,7 +82,7 @@ shaper_init :: proc( ctx : ^Shaper_Context )
assert( ctx.hb_buffer != nil, "VEFontCache.shaper_init: Failed to create harfbuzz buffer")
}
shaper_shutdown :: proc( ctx : ^Shaper_Context )
shaper_shutdown :: proc( ctx : ^Shaper_Context )
{
if ctx.hb_buffer != nil {
harfbuzz.buffer_destroy( ctx.hb_buffer )
@@ -144,9 +144,9 @@ shaper_shape_harfbuzz :: proc( ctx : ^Shaper_Context, text_utf8 : string, entry
profile(#procedure)
// Set script and direction. We use the system's default langauge.
// script = HB_SCRIPT_LATIN
harfbuzz.buffer_set_script( buffer, script )
harfbuzz.buffer_set_script ( buffer, script )
harfbuzz.buffer_set_direction( buffer, harfbuzz.script_get_horizontal_direction( script ))
harfbuzz.buffer_set_language( buffer, harfbuzz.language_get_default() )
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 )
@@ -171,12 +171,11 @@ shaper_shape_harfbuzz :: proc( ctx : ^Shaper_Context, text_utf8 : string, entry
position.x = 0.0
position.y -= line_height
position.y = floor(position.y)
(line_count^) += 1
(line_count^) += 1
continue
}
if abs( font_px_size ) <= adv_snap_small_font_threshold
{
(position^) = ceil( position^ )
if abs( font_px_size ) <= adv_snap_small_font_threshold {
(position^) = ceil( position^ )
}
glyph_pos := position^
@@ -219,7 +218,10 @@ shaper_shape_harfbuzz :: proc( ctx : ^Shaper_Context, text_utf8 : string, entry
ScriptKind :: harfbuzz.Script
special_script : b32 = script == ScriptKind.UNKNOWN || script == ScriptKind.INHERITED || script == ScriptKind.COMMON
if special_script || script == current_script || byte_offset == 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
@@ -287,15 +289,13 @@ shaper_shape_text_uncached_advanced :: #force_inline proc( ctx : ^Shaper_Context
resize( & output.bounds, len(output.glyph) )
profile_begin("atlas_lru_code")
for id, index in output.glyph
{
for id, index in output.glyph {
output.atlas_lru_code[index] = atlas_glyph_lru_code(entry.id, font_px_size, id)
}
profile_end()
profile_begin("bounds & region")
for id, index in output.glyph
{
for id, index in output.glyph {
bounds := & output.bounds[index]
(bounds ^) = parser_get_bounds( entry.parser_info, id )
bounds_size_scaled := (bounds.p1 - bounds.p0) * font_scale
@@ -377,15 +377,13 @@ shaper_shape_text_latin :: proc( ctx : ^Shaper_Context,
resize( & output.bounds, len(output.glyph) )
profile_begin("atlas_lru_code")
for id, index in output.glyph
{
for id, index in output.glyph {
output.atlas_lru_code[index] = atlas_glyph_lru_code(entry.id, font_px_size, id)
}
profile_end()
profile_begin("bounds & region")
for id, index in output.glyph
{
for id, index in output.glyph {
bounds := & output.bounds[index]
(bounds ^) = parser_get_bounds( entry.parser_info, id )
bounds_size_scaled := (bounds.p1 - bounds.p0) * font_scale
@@ -429,12 +427,12 @@ shaper_shape_text_cached :: proc( text_utf8 : string,
shape_cache_idx := lru_get( state, lru_code )
if shape_cache_idx == -1
{
if shape_cache.next_cache_id < i32(state.capacity) {
if shape_cache.next_cache_id < i32(state.capacity){
shape_cache_idx = shape_cache.next_cache_id
shape_cache.next_cache_id += 1
evicted := lru_put( state, lru_code, shape_cache_idx )
}
else
else
{
next_evict_idx := lru_get_next_evicted( state ^ )
assert( next_evict_idx != LRU_Fail_Mask_32 )