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More progress toward VEFontCache rendering

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Based off of render doc, most likely down to UV issues for where on the glyph buffer the shape is located
This commit is contained in:
Edward R. Gonzalez
2024-06-14 03:13:42 -04:00
parent bcb684e140
commit 3b9e08794a
5 changed files with 58 additions and 41 deletions
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18
code/font/VEFontCache/VEFontCache.odin
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@@ -122,9 +122,13 @@ font_key_from_label :: #force_inline proc( label : string ) -> u64 {
// ve_fontcache_eval_bezier (quadratic)
eval_point_on_bezier3 :: proc( p0, p1, p2 : Vec2, alpha : f32 ) -> Vec2
{
starting_point := p0 * (1 - alpha) * (1 - alpha)
control_point := p1 * 2.0 * (1 - alpha) * alpha
end_point := p2 * alpha * alpha
weight_start := (1 - alpha) * (1 - alpha)
weight_control := 2.0 * (1 - alpha) * alpha
weight_end := alpha * alpha
starting_point := p0 * weight_start
control_point := p1 * weight_control
end_point := p2 * weight_end
point := starting_point + control_point + end_point
return point
@@ -618,15 +622,15 @@ cache_glyph_to_atlas :: proc( ctx : ^Context, font : FontID, glyph_index : Glyph
dst_size := Vec2 { dst_width, dst_height }
dst_glyph_size := Vec2 { dst_glyph_width, dst_glyph_height }
screenspace_x_form( & dst_glyph_position, & dst_glyph_size, f32(atlas.buffer_width), f32(atlas.buffer_height) )
screenspace_x_form( & dst_position, & dst_size, f32(atlas.buffer_width), f32(atlas.buffer_height) )
screenspace_x_form( & dst_glyph_position, & dst_glyph_size, f32(atlas.width), f32(atlas.height) )
screenspace_x_form( & dst_position, & dst_size, f32(atlas.width), f32(atlas.height) )
src_position := Vec2 { f32(atlas.update_batch_x), 0 }
src_size := Vec2 {
f32(bounds_width) * glyph_draw_scale.x,
f32(bounds_height) * glyph_draw_scale.y,
}
src_size += Vec2{1,1} * 2 * over_sample * glyph_padding
src_size += 2 * over_sample * glyph_padding
textspace_x_form( & src_position, & src_size, f32(atlas.buffer_width), f32(atlas.buffer_height) )
// Advance glyph_update_batch_x and calculate final glyph drawing transform
@@ -781,5 +785,7 @@ shape_text_uncached :: proc( ctx : ^Context, font : FontID, output : ^ShapedText
position.x += f32(advance) * entry.size_scale
prev_codepoint = codepoint
}
output.end_cursor_pos = position
}
}

35
code/font/VEFontCache/draw.odin
View File

@@ -80,6 +80,10 @@ blit_quad :: proc( draw_list : ^DrawList, p0, p1 : Vec2, uv0, uv1 : Vec2 )
for index : i32 = 0; index < 6; index += 1 {
append( & draw_list.indices, v_offset + quad_indices[ index ] )
}
draw_list_vert_slice := array_to_slice(draw_list.vertices)
draw_list_index_slice := array_to_slice(draw_list.indices)
return
}
// ve_fontcache_clear_drawlist
@@ -175,9 +179,9 @@ draw_cached_glyph :: proc( ctx : ^Context, entry : ^Entry, glyph_index : Glyph,
atlas := & ctx.atlas
// Figure out the source bounding box in the atlas texture
position, width, height := atlas_bbox( atlas, region_kind, u32(atlas_index) )
atlas_position, atlas_width, atlas_height := atlas_bbox( atlas, region_kind, u32(atlas_index) )
glyph_position := position
glyph_position := atlas_position
glyph_width := f32(bounds_width) * entry.size_scale
glyph_height := f32(bounds_height) * entry.size_scale
@@ -186,6 +190,10 @@ draw_cached_glyph :: proc( ctx : ^Context, entry : ^Entry, glyph_index : Glyph,
glyph_scale := Vec2 { glyph_width, glyph_height }
bounds_0_scaled := Vec2{ f32(bounds_0.x), f32(bounds_0.y) } * entry.size_scale - { 0.5, 0.5 }
bounds_0_scaled = {
cast(f32) cast(i32) bounds_0_scaled.x,
cast(f32) cast(i32) bounds_0_scaled.y,
}
dst := Vec2 {
position.x + scale.x * bounds_0_scaled.x,
position.y + scale.y * bounds_0_scaled.y,
@@ -194,7 +202,7 @@ draw_cached_glyph :: proc( ctx : ^Context, entry : ^Entry, glyph_index : Glyph,
dst_height := scale.y * glyph_height
dst -= scale * { f32(atlas.glyph_padding), f32(atlas.glyph_padding) }
dst_scale := Vec2 { dst_width, dst_height }
textspace_x_form( & glyph_position, & dst_scale, f32(atlas.buffer_width), f32(atlas.buffer_height) )
textspace_x_form( & glyph_position, & glyph_scale, f32(atlas.width), f32(atlas.height) )
// Add the glyph drawcall
call := DrawCall_Default
@@ -209,12 +217,13 @@ draw_cached_glyph :: proc( ctx : ^Context, entry : ^Entry, glyph_index : Glyph,
}
append( & ctx.draw_list.calls, call )
// NOTE(Ed): Never done in the original
// Clear glyph_update_FBO
call.pass = .Glyph
call.start_index = 0
call.end_index = 0
call.clear_before_draw = true
append( & ctx.draw_list.calls, call )
// call.pass = .Glyph
// call.start_index = 0
// call.end_index = 0
// call.clear_before_draw = true
// append( & ctx.draw_list.calls, call )
return true
}
@@ -279,8 +288,8 @@ draw_text :: proc( ctx : ^Context, font : FontID, text_utf8 : string, position :
snap_height := f32(ctx.snap_height)
position := position
if ctx.snap_width > 0 do position.x = (position.x * snap_width + 0.5) / snap_width
if ctx.snap_height > 0 do position.y = (position.y * snap_height + 0.5) / snap_height
if ctx.snap_width > 0 do position.x = cast(f32) cast(u32) (position.x * snap_width + 0.5) / snap_width
if ctx.snap_height > 0 do position.y = cast(f32) cast(u32) (position.y * snap_height + 0.5) / snap_height
entry := & ctx.entries.data[ font ]
@@ -319,9 +328,9 @@ draw_text_batch :: proc( ctx : ^Context, entry : ^Entry, shaped : ^ShapedText, b
{
glyph_index := shaped.glyphs.data[ index ]
shaped_position := shaped.positions.data[index]
glyph_translate_x := position.x + shaped_position.x * scale.x
glyph_translate_y := position.y + shaped_position.y * scale.y
glyph_cached := draw_cached_glyph( ctx, entry, glyph_index, {glyph_translate_x, glyph_translate_y}, scale)
// glyph_translate_x := position.x + shaped_position.x * scale.x
glyph_translate := position + shaped_position * scale
glyph_cached := draw_cached_glyph( ctx, entry, glyph_index, glyph_translate, scale)
assert( glyph_cached == true )
}
}