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Finished inital draft for draw list generation docs in guide_architecture.md

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Edward R. Gonzalez
2025-01-11 22:59:35 -05:00
parent b220812950
commit e8218f3bf8
6 changed files with 95 additions and 50 deletions
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47
vefontcache/draw.odin
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@@ -28,23 +28,14 @@ Glyph_Draw_Quad :: struct {
// This is used by generate_shape_draw_list & batch_generate_glyphs_draw_list
// to track relevant glyph data in soa format for pipelined processing
Glyph_Pack_Entry :: struct #packed {
vis_index : i16,
position : Vec2,
atlas_index : i32,
in_atlas : b8,
should_cache : b8,
region_pos : Vec2,
region_size : Vec2,
over_sample : Vec2, // Only used for oversized glyphs
shape : Parser_Glyph_Shape,
draw_transform : Transform,
draw_quad : Glyph_Draw_Quad,
draw_atlas_quad : Glyph_Draw_Quad,
draw_quad_clear : Glyph_Draw_Quad,
buffer_x : f32,
flush_glyph_buffer : b8,
}
@@ -322,6 +313,16 @@ generate_shape_draw_list :: proc( draw_list : ^Draw_List, shape : Shaped_Text,
to_cache := & glyph_buffer.to_cache
cached := & glyph_buffer.cached
resize_soa_non_zero(glyph_pack, len(shape.visible))
profile_begin("batching & segregating glyphs")
// We do any reservation up front as appending to the array's will not check.
reserve(oversized, len(shape.visible))
reserve(to_cache, len(shape.visible))
reserve(cached, len(shape.visible))
clear(oversized)
clear(to_cache)
clear(cached)
reset_batch( & glyph_buffer.batch_cache)
append_sub_pack :: #force_inline proc ( pack : ^[dynamic]i32, entry : i32 )
{
@@ -340,16 +341,6 @@ generate_shape_draw_list :: proc( draw_list : ^Draw_List, shape : Shaped_Text,
}
profile_end()
profile_begin("batching & segregating glyphs")
// We do any reservation up front as appending to the array's will not check.
reserve(oversized, len(shape.visible))
reserve(to_cache, len(shape.visible))
reserve(cached, len(shape.visible))
clear(oversized)
clear(to_cache)
clear(cached)
reset_batch( & glyph_buffer.batch_cache)
for & glyph, index in glyph_pack
{
// atlas_lru_code, region_kind, and bounds are all 1:1 with shape.visible
@@ -616,12 +607,6 @@ batch_generate_glyphs_draw_list :: proc ( draw_list : ^Draw_List,
& glyph_buffer.allocated_x
)
// vis_id := shape.visible[id]
// error : Allocator_Error
// glyph.shape, error = parser_get_glyph_shape(entry.parser_info, shape.glyph[vis_id])
// assert(error == .None)
// assert(len(glyph.shape) > 0)
generate_glyph_pass_draw_list( draw_list, & glyph_buffer.shape_gen_scratch,
glyph_pack[id].shape,
entry.curve_quality,
@@ -630,9 +615,6 @@ batch_generate_glyphs_draw_list :: proc ( draw_list : ^Draw_List,
glyph_pack[id].draw_transform.scale
)
// assert(len(glyph.shape) > 0)
// parser_free_shape(entry.parser_info, glyph.shape)
target_quad := & glyph_pack[id].draw_quad
draw_to_target : Draw_Call
@@ -743,12 +725,6 @@ batch_generate_glyphs_draw_list :: proc ( draw_list : ^Draw_List,
append( & glyph_buffer.clear_draw_list.calls, clear_target_region )
append( & glyph_buffer.draw_list.calls, blit_to_atlas )
// vis_id := shape.visible[id]
// error : Allocator_Error
// glyph.shape, error = parser_get_glyph_shape(entry.parser_info, shape.glyph[vis_id])
// assert(error == .None)
// assert(len(glyph.shape) > 0)
// Render glyph to glyph render target (FBO)
generate_glyph_pass_draw_list( draw_list, & glyph_buffer.shape_gen_scratch,
glyph.shape,
@@ -757,9 +733,6 @@ batch_generate_glyphs_draw_list :: proc ( draw_list : ^Draw_List,
glyph.draw_transform.pos,
glyph.draw_transform.scale
)
// assert(len(glyph.shape) > 0)
// parser_free_shape(entry.parser_info, glyph.shape)
}
flush_glyph_buffer_draw_list(draw_list, & glyph_buffer.draw_list, & glyph_buffer.clear_draw_list, & glyph_buffer.allocated_x)