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Add assignable allocator support to stb_truetype

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Edward R. Gonzalez
2025-01-10 22:44:39 -05:00
parent 87ab22c207
commit c64f8132dc
11 changed files with 18882 additions and 46 deletions
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12
vefontcache/draw.odin
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@@ -596,6 +596,7 @@ batch_generate_glyphs_draw_list :: proc ( draw_list : ^Draw_List,
error : Allocator_Error
glyph_pack[pack_id].shape, error = parser_get_glyph_shape(entry.parser_info, shape.glyph[pack_id])
assert(error == .None)
assert(glyph_pack[pack_id].shape != nil)
}
for id, index in oversized
{
@@ -633,7 +634,10 @@ batch_generate_glyphs_draw_list :: proc ( draw_list : ^Draw_List,
}
flush_glyph_buffer_draw_list(draw_list, & glyph_buffer.draw_list, & glyph_buffer.clear_draw_list, & glyph_buffer.allocated_x)
for id, index in oversized do parser_free_shape(entry.parser_info, glyph_pack[id].shape)
for pack_id, index in oversized {
assert(glyph_pack[pack_id].shape != nil)
parser_free_shape(entry.parser_info, glyph_pack[pack_id].shape)
}
}
profile_end()
@@ -666,6 +670,7 @@ batch_generate_glyphs_draw_list :: proc ( draw_list : ^Draw_List,
error : Allocator_Error
glyph_pack[pack_id].shape, error = parser_get_glyph_shape(entry.parser_info, shape.glyph[pack_id])
assert(error == .None)
assert(glyph_pack[pack_id].shape != nil)
}
for id, index in to_cache
@@ -731,7 +736,10 @@ batch_generate_glyphs_draw_list :: proc ( draw_list : ^Draw_List,
}
flush_glyph_buffer_draw_list(draw_list, & glyph_buffer.draw_list, & glyph_buffer.clear_draw_list, & glyph_buffer.allocated_x)
for id, index in to_cache do parser_free_shape(entry.parser_info, glyph_pack[id].shape)
for pack_id, index in to_cache {
assert(glyph_pack[pack_id].shape != nil)
parser_free_shape(entry.parser_info, glyph_pack[pack_id].shape)
}
profile_begin("gen_cached_draw_list: to_cache")
when ENABLE_DRAW_TYPE_VISUALIZATION {

38
vefontcache/parser.odin
View File

@@ -18,6 +18,7 @@ Already wanted to do so anyway to evaluate the shape generation implementation.
import "base:runtime"
import "core:c"
import "core:math"
import "core:mem"
import "core:slice"
import stbtt "thirdparty:stb/truetype"
// import freetype "thirdparty:freetype"
@@ -57,13 +58,44 @@ Parser_Glyph_Vertex :: struct {
Parser_Glyph_Shape :: [dynamic]Parser_Glyph_Vertex
Parser_Context :: struct {
kind : Parser_Kind,
lib_backing : Allocator,
kind : Parser_Kind,
// ft_library : freetype.Library,
}
parser_init :: proc( ctx : ^Parser_Context, kind : Parser_Kind )
parser_stbtt_allocator_proc :: proc(
allocator_data : rawptr,
type : stbtt.gbAllocationType,
size : c.ssize_t,
alignment : c.ssize_t,
old_memory : rawptr,
old_size : c.ssize_t,
flags : c.ulonglong
) -> rawptr
{
ctx.kind = kind
allocator := transmute(^Allocator) allocator_data
result, error := allocator.procedure( allocator.data, cast(mem.Allocator_Mode) type, cast(int) size, cast(int) alignment, old_memory, cast(int) old_size )
assert(error == .None)
if type == .Alloc || type == .Resize {
return transmute(rawptr) & result[0]
}
else do return nil
}
parser_init :: proc( ctx : ^Parser_Context, kind : Parser_Kind, allocator := context.allocator )
{
ctx.kind = kind
ctx.lib_backing = allocator
stbtt_allocator := stbtt.gbAllocator { parser_stbtt_allocator_proc, & ctx.lib_backing }
stbtt.SetAllocator( stbtt_allocator )
}
parser_reload :: proc( ctx : ^Parser_Context, allocator := context.allocator) {
ctx.lib_backing = allocator
stbtt_allocator := stbtt.gbAllocator { parser_stbtt_allocator_proc, & ctx.lib_backing }
stbtt.SetAllocator( stbtt_allocator )
}
parser_shutdown :: proc( ctx : ^Parser_Context ) {