fixes

src/VulkanRenderer

@@ -1 +1 @@
-Subproject commit 11cf96b799c6ccee3c4f569e89c263d11c4d5ff8
+Subproject commit c2b7544979b16e1f27f419475b866a2903bd9c0a

src/dlib

@@ -1 +1 @@
-Subproject commit bda9abf8b9c74844cb30edb32e81543cbd5ae89d
+Subproject commit c00c404006147838fb8af3259cf214396da31c99

src/editor/buffer.d

@@ -1,4 +1,5 @@
 import dlib;
+import dlib.alloc : Reset;
 import core.stdc.stdio : EOF;
 import parsing;
 import parsing : SetBuffers;
@@ -476,6 +477,12 @@ SliceLineBuffer(FlatBuffer* fb, Line* ls)
 	return lbuf;
 }
 
+pragma(inline) void
+ResetBuffer(FlatBuffer* fb)
+{
+	Reset(&fb.linebufs.arena);
+}
+
 void
 MoveToEOL(FlatBuffer* fb)
 {

src/editor/editor.d

@@ -61,10 +61,7 @@ struct Editor
 	I64Vec2     cursor_pos;
 	Vec2        select_start;
 	Vec2        select_end;
-
 	i64         line_offset;
-
-	f32         text_size;
 }
 
 struct ChangeStacks
@@ -155,48 +152,6 @@ Cycle(Inputs* inputs)
 	{
 		CommandPalette(&g_ed_ctx.cmd);
 	}
-	/*
-	UIPanel* root = ctx.base_panel;
-
-	root.size.x    = g_ui_ctx.res.x;
-	root.size.y    = g_ui_ctx.res.y;
-	root.rect.p0 = 0.0;
-	root.rect.p1 = 0.0;
-
-	static foreach(axis; A2D.min .. A2D.max)
-	{
-		for(UIPanel* p = root; !Nil(p); p = Recurse(p, g_UI_NIL_PANEL))
-		{
-			f32 pos = p.rect.p0.v[axis];
-			for(UIPanel* c = p.first; !Nil(c); c = c.next)
-			{
-				c.size.v[axis]      = p.axis == axis ? c.pct * p.size.v[axis] : p.size.v[axis]; 
-				c.rect.p0.v[axis] = pos;
-				c.rect.p1.v[axis] = pos + c.size.v[axis];
-
-				if(axis == p.axis)
-				{
-					pos += c.size.v[axis];
-				}
-			}
-		}
-	}
-
-	for(auto p = ctx.base_panel; !Nil(p); p = Recurse(p, g_UI_NIL_PANEL))
-	{
-		Panel(p);
-	}
-
-	if(ctx.state == ES.CmdOpen)
-	{
-		if(ctx.cmd.commands.length == 0 && ctx.cmd.icount == 0)
-		{
-			GetCommands(&ctx.cmd);
-		}
-
-		CommandPalette(&ctx.cmd);
-	}
-	*/
 
 	EndUI();
 }
@@ -266,6 +221,7 @@ CreatePanel(EditorCtx* ctx, Editor* ed = null)
 	p.layout_axis = A2D.Y;
 	p.ed          = ed;
 	p.id          = ctx.panel_id++;
+	p.text_size   = 18;
 	p.parent = p.first = p.last = p.next = p.prev = g_NIL_PANEL;
 
 	return p;

src/editor/ui.d

@@ -37,18 +37,20 @@ enum Vec4 TEXT_HL_COL   = Vec4(0.0, 0.0, 0.0, 1.0);
 
 const u64  VERTEX_MAX_COUNT = 10000;
 const Vec2 CLICK_BUFFER     = Vec2(3.0, 3.0);
+const u32  FONT_SIZES       = 24;
+const u32  ATLAS_DIMENSION  = 512;
 
 // TODO: add setting
-const f32 TEXT_SIZE          = 16.0;
 const f32 SCROLL_SPEED       = 48.0;
 const f32 LINE_COUNT_PADDING = 4.0;
 
 __gshared UICtx g_ui_ctx;
 
 //const u8[] FONT_BYTES     = import("pc-9800.ttf");
-const u8[] FONT_BYTES     = import("NuberNextCondensed-DemiBold.otf");
-const u8[] VERTEX_BYTES   = import("gui.vert.spv");
-const u8[] FRAGMENT_BYTES = import("gui.frag.spv");
+//const u8[] FONT_BYTES     = import("NuberNextCondensed-DemiBold.otf");
+u8[] FONT_BYTES     = cast(u8[])import("jetbrains-mono/JetBrainsMono-Regular.ttf");
+u8[] VERTEX_BYTES   = cast(u8[])import("gui.vert.spv");
+u8[] FRAGMENT_BYTES = cast(u8[])import("gui.frag.spv");
 
 Vec4      g_corner_radius_default     = 0.0;
 f32       g_edge_softness_default     = 0.8;
@@ -62,7 +64,7 @@ Vec4      g_text_hl_col_default       = TEXT_HL_COL;
 UISize[2] g_size_info_default         = [UISize(ST.Percentage, 1.0), UISize(ST.Percentage, 1.0)];
 Axis2D    g_layout_axis_default       = A2D.X;
 Vec2      g_padding_default           = Vec2(0.0);
-f32       g_text_scale_default        = 1.0;
+u32       g_text_size_default         = 18;
 Vec2      g_scroll_target_default     = Vec2(0.0);
 Vec2      g_scroll_clamp_default      = Vec2(0.0);
 Vec2      g_view_offset_default       = Vec2(0.0);
@@ -131,6 +133,7 @@ enum UIFlags
 alias UIF = UIFlags;
 
 const UIFlags AUTO_FLAGS = UIF.ResizeAdjacent;
+const UIFlags DRAW_FLAGS = UIF.DrawBackground|UIF.DrawBorder|UIF.DrawText|UIF.PortalView;
 
 enum UISignal
 {
@@ -233,7 +236,8 @@ struct UICtx
 
 	PlatformWindow*             window;
 	Renderer                    rd;
-	Descriptor                  font_atlas;
+	Descriptor[FONT_SIZES]      font_descs;
+	Descriptor                  default_tex;
 	Descriptor                  sampler;
 	Pipeline                    pipeline;
 	DescSetLayout               desc_set_layout;
@@ -242,16 +246,13 @@ struct UICtx
 	Mat4                        projection;
 	Vec2                        res;
 
-	u8[]			                  font_data;
 	FontFace                    font;
-	FontAtlasBuf                atlas_buf;
-	f32                         char_width;
-	f32                         char_height;
+	FontGlyphs[FONT_SIZES]      glyph_sets;
+	u32                         glyph_sets_used;
 
 	UIBuffer[FRAME_OVERLAP]     buffers;
 
 	u32                         tab_width;
-	f32                         text_size;
 	Vec4[TS.max][UISH.max]      syntax_colors;
 
 	UIItem*                     window_root;
@@ -278,10 +279,18 @@ struct UICtx
 	mixin UICtxParameter!(Vec4,              "corner_radius");
 	mixin UICtxParameter!(f32,               "border_thickness");
 	mixin UICtxParameter!(f32,               "edge_softness");
-	mixin UICtxParameter!(f32,               "text_scale");
+	mixin UICtxParameter!(u32,               "text_size");
 	mixin UICtxParameter!(UISyntaxHighlight, "syntax_highlight");
 
 	debug bool                  dbg;
+	debug u64                   item_count;
+}
+
+struct FontGlyphs
+{
+	u32          size;
+	u32          index;
+	FontAtlasBuf abuf;
 }
 
 struct Stack(T)
@@ -337,6 +346,7 @@ struct UIItem
 
 	UIItem*  next, prev, first, last; // parent in mixin
 	UIItem*  transient_next;
+	UIItem*  last_relative_item;
 	
 	Rect     rect;
 	Vec2     size;
@@ -412,6 +422,7 @@ struct Vertex
 	f32 edge_softness;
 	f32 raised;
 	u32 texture;
+	u32 atlas_index;
 }
 
 union Rect
@@ -462,26 +473,23 @@ InitUICtx(PlatformWindow* window)
 	
 	UIBuffer[FRAME_OVERLAP] buffers;
 
-	UICtx ctx = {
-		items:         CreateHashTable!(UIHash, UIItem*)(12),
-		free_items:    Alloc!(UIItem)(&arena),
-		arena:         arena,
-		temp_arena:    CreateArena(MB(1)),
-		drag_item:     g_UI_NIL,
-		transient_items: g_UI_NIL,
-		font:          OpenFont(cast(u8[])FONT_BYTES),
-		font_data:     cast(u8[])FONT_BYTES,
-		text_size:     16.0,
-		tab_width:     2,
-		syntax_colors: [DEFAULT_COLORS, SYNTAX_COLORS],
-	};
+	UICtx* ctx = &g_ui_ctx;
+
+	ctx.items           = CreateHashTable!(UIHash, UIItem*)(12);
+	ctx.free_items      = Alloc!(UIItem)(&arena);
+	ctx.arena           = arena;
+	ctx.temp_arena      = CreateArena(MB(1));
+	ctx.drag_item       = g_UI_NIL;
+	ctx.transient_items = g_UI_NIL;
+	ctx.font            = OpenFont(cast(u8[])FONT_BYTES);
+	ctx.tab_width       = 2;
+	ctx.syntax_colors   = [DEFAULT_COLORS, SYNTAX_COLORS];
+
+	assert(ctx.font);
 
 	UIItem* fi = ctx.free_items;
 	fi.transient_next = fi.first = fi.last = fi.next = fi.prev = fi.parent = g_UI_NIL;
 
-	ctx.atlas_buf   = CreateAtlas(&arena, ctx.font, 16.0, 256);
-	ctx.char_height = cast(f32)((ctx.font.size.metrics.ascender - ctx.font.size.metrics.descender) >> 6);
-
 	version(ENABLE_RENDERER)
 	{
 		ctx.rd = InitRenderer(handles, MB(16), MB(8));
@@ -496,7 +504,7 @@ InitUICtx(PlatformWindow* window)
 		}
 
 		DescLayoutBinding[2] layout_bindings = [
-			{ binding: 0, descriptorType: DT.Image,   descriptorCount: 1, stageFlags: SS.All },
+			{ binding: 0, descriptorType: DT.Image,   descriptorCount: FONT_SIZES, stageFlags: SS.All },
 			{ binding: 1, descriptorType: DT.Sampler, descriptorCount: 1,          stageFlags: SS.All },
 		];
 
@@ -504,7 +512,7 @@ InitUICtx(PlatformWindow* window)
 		ctx.desc_set        = AllocDescSet(&ctx.rd, ctx.desc_set_layout);
 		ctx.pipeline_layout = CreatePipelineLayout(&ctx.rd, ctx.desc_set_layout, Mat4.sizeof);
 
-		Attribute[13] attributes = [
+		Attribute[] attributes = [
 			{ binding: 0, location: 0,  format: FMT.RGBA_F32, offset: Vertex.cols.offsetof                         },
 			{ binding: 0, location: 1,  format: FMT.R_F32,    offset: Vertex.corner_radius.offsetof + f32.sizeof*0 },
 			{ binding: 0, location: 2,  format: FMT.R_F32,    offset: Vertex.corner_radius.offsetof + f32.sizeof*1 },
@@ -518,6 +526,7 @@ InitUICtx(PlatformWindow* window)
 			{ binding: 0, location: 10, format: FMT.R_F32,    offset: Vertex.edge_softness.offsetof                },
 			{ binding: 0, location: 11, format: FMT.R_F32,    offset: Vertex.raised.offsetof                       },
 			{ binding: 0, location: 12, format: FMT.R_U32,    offset: Vertex.texture.offsetof                      },
+			{ binding: 0, location: 13, format: FMT.R_U32,    offset: Vertex.atlas_index.offsetof                  },
 		];
 
 		GfxPipelineInfo ui_info = {
@@ -535,16 +544,69 @@ InitUICtx(PlatformWindow* window)
 			alpha_op:          BO.Add,
 		};
 
+		for(u32 i = 0; i < ctx.font_descs.length; i += 1)
+		{
+			CreateImageViewTex(&ctx.rd, &ctx.font_descs[i], ATLAS_DIMENSION, ATLAS_DIMENSION, DT.Image, 0, i);
+			ctx.glyph_sets[i].index = i;
+		}
+
+		FontAtlasBuf* abuf = GetFontAtlas(g_text_size_default);
+
 		CreateGraphicsPipeline(&ctx.rd, &ctx.pipeline, &ui_info);
-		CreateImageView(&ctx.rd, &ctx.font_atlas, ctx.atlas_buf.atlas.width, ctx.atlas_buf.atlas.height, 4, ctx.atlas_buf.data, DT.Image, 0);
 		ctx.sampler = CreateSampler(&ctx.rd, MipmapMode.Nearest, 1);
-		Write(&ctx.rd, ctx.desc_set, [ctx.font_atlas, ctx.sampler]);
+
+		u8[512*512*4] white_tex = 255;
+		for(u32 i = 1; i < ctx.font_descs.length; i += 1)
+		{
+			Transfer(&ctx.rd, &ctx.font_descs[i].view, white_tex, ATLAS_DIMENSION, ATLAS_DIMENSION);
+		}
+
+		Write(&ctx.rd, ctx.desc_set, ctx.font_descs);
+		Write(&ctx.rd, ctx.desc_set, &ctx.sampler);
 		SetClearColors(&ctx.rd, [0.0, 0.0, 0.0, 1.0], [0.0, 0.0, 0.0, 0.0]);
 	}
 
-	InitStacks(&ctx);
+	InitStacks(ctx);
+}
 
-	g_ui_ctx = ctx;
+FontAtlasBuf*
+GetFontAtlas(u32 size)
+{
+	return &GetFontGlyphs(size).abuf;
+}
+
+FontGlyphs*
+GetFontGlyphs(u32 size)
+{
+	UICtx* ctx = GetCtx();
+
+	FontGlyphs* fg = null;
+	for(u64 i = 0; i < ctx.glyph_sets_used; i += 1)
+	{
+		if(size == ctx.glyph_sets[i].size)
+		{
+			fg = &ctx.glyph_sets[i];
+			break;
+		}
+	}
+	
+	if(!fg)
+	{
+		u32 i = ctx.glyph_sets_used;
+		fg    = &ctx.glyph_sets[i];
+
+		assert(ctx.font);
+
+		fg.abuf = CreateAtlas(&ctx.arena, ctx.font, cast(f32)size, ATLAS_DIMENSION);
+		fg.size = size;
+
+		Transfer(&ctx.rd, &ctx.font_descs[i].view, fg.abuf.data, ATLAS_DIMENSION, ATLAS_DIMENSION);
+		Write(&ctx.rd, ctx.desc_set, &ctx.font_descs[i]);
+
+		ctx.glyph_sets_used += 1;
+	}
+
+	return fg;
 }
 
 void
@@ -626,75 +688,41 @@ MakeItem(T)(T k, UIFlags flags = UIF.None) if(is(T: UIKey) || StringType!T)
 		}
 	}
 
-	item.max_text_width = 0.0;
+	FontAtlasBuf* abuf  = GetFontAtlas(item.text_size);
 	string str          = item.display_string.length ? item.display_string : item.key.text;
-
+	item.max_text_width = cast(f32)(str.length)*abuf.atlas.max_advance;
 	if(item.flags & UIF.TextWrap)
 	{
+
 		f32 width       = item.size_info[A2D.X].type == ST.TextSize ? item.parent.size.x : item.size.x;
-		f32 text_width = CalcTextWidth(str);
+		u32 ch_per_line = cast(u32)floor(width/abuf.atlas.max_advance);
+		u64 lines       = (str.length/ch_per_line) + (str.length%ch_per_line ? 1 : 0);
 
-		if(text_width < width || width == 0.0) goto InitSingleLine;
-
-		u64 lines           = cast(u64)(ceil(text_width/width));
+		u32 max_chars       = str.length > ch_per_line ? ch_per_line : cast(u32)str.length;
+		item.max_text_width = cast(f32)(max_chars)*abuf.atlas.max_advance;
 		item.text_lines     = ScratchAlloc!(string)(lines);
 
-		assert(!item.syntax_tokens.length || item.syntax_tokens.length == str.length);
+		u64 start;
+		for(u64 i = 0; i < lines; i += 1)
+		{
+			u64 end             = str.length-start <= ch_per_line ? str.length : start+ch_per_line;
+			item.text_lines[i]  = str[start .. end];
+		}
 
 		if(item.syntax_tokens.length)
 		{
 			item.token_lines = ScratchAlloc!(u8[])(lines);
-		}
-
-		f32     w        = 0.0;
-		u64     line     = 0;
-		u64     ch_start = 0;
-		Glyph[] glyphs   = ctx.atlas_buf.atlas.glyphs;
-
-		for(u64 i = 0; i < str.length; i += 1)
+			for(u64 i = 0; i < lines; i += 1)
 			{
-			Glyph* g = str[i] < glyphs.length ? glyphs.ptr+str[i] : glyphs.ptr+0; 
-
-			f32 glyph_w = GlyphWidth(g);
-			if(glyph_w+w > width)
-			{
-				item.text_lines[line] = str[ch_start .. i];
-				if(item.syntax_tokens.length)
-				{
-					item.token_lines[line] = item.syntax_tokens[ch_start .. i];
+				u64 end             = str.length-start <= ch_per_line ? str.length : start+ch_per_line;
+				item.token_lines[i] = item.syntax_tokens[start .. end];
 			}
-
-				line += 1;
-				ch_start = i;
-
-				item.max_text_width = item.max_text_width < w ? w : item.max_text_width;
-
-				if(line == lines-1)
-				{
-					item.text_lines[line] = str[ch_start .. $];
-					if(item.syntax_tokens.length)
-					{
-						item.token_lines[line] = item.syntax_tokens[ch_start .. $];
-					}
-
-					w                     = CalcTextWidth(item.text_lines[line]);
-					item.max_text_width   = item.max_text_width < w ? w : item.max_text_width;
-
-					break;
-				}
-
-				w = 0.0;
-			}
-
-			w += glyph_w;
 		}
 	}
 	else
 	{
-InitSingleLine:
 		item.text_lines    = ScratchAlloc!(string)(1);
 		item.text_lines[0] = str;
-		item.max_text_width = CalcTextWidth(item.text_lines[0]);
 
 		if(item.syntax_tokens.length)
 		{
@@ -816,6 +844,8 @@ BeginUI(Inputs* inputs)
 	UICtx* ctx = GetCtx();
 	Arena* a   = &ctx.temp_arena;
 
+	debug ctx.item_count = 0;
+
 	Reset(a);
 
 	// Convert Inputs
@@ -885,19 +915,20 @@ BeginUI(Inputs* inputs)
 		}
 	}
 
-	for(UIItem* item = ctx.transient_items; !Nil(item); item = item.transient_next)
+	for(UIItem* item = ctx.transient_items; !Nil(item);)
 	{
+		UIItem* next = item.transient_next;
 		memset(item, 0, UIItem.sizeof);
 		DLLPush(ctx.free_items, item, g_UI_NIL);
+		item = next;
 	}
 
-	ctx.frame        += 1;
-	ctx.transient_items = g_UI_NIL;
 
 	// Ctx state
+	ctx.transient_items = g_UI_NIL;
+	ctx.frame          += 1;
 	ctx.f_idx           = ctx.frame%FRAME_OVERLAP;
 	ctx.inputs          = inputs;
-	ctx.char_width = GlyphWidth(&ctx.atlas_buf.atlas.glyphs[' ']);
 
 	ResetStacks(ctx);
 
@@ -992,7 +1023,7 @@ EndUI()
 				}
 				else
 				{
-					item.size.v[axis] = item.padding.y*2.0 + TEXT_SIZE*item.text_lines.length;
+					item.size.v[axis] = item.padding.y*2.0 + GetFontAtlas(item.text_size).atlas.line_height*item.text_lines.length;
 				}
 			}
 		}
@@ -1074,10 +1105,7 @@ EndUI()
 						excess         -= reduced;
 						c.size.v[axis] -= reduced;
 
-						if(excess <= 0.0009)
-						{
-							break;
-						}
+						if(excess <= 0.0009) break;
 					}
 
 					if(excess > 0.0009)
@@ -1093,10 +1121,7 @@ EndUI()
 							excess         -= reduced;
 							c.size.v[axis] -= reduced;
 
-							if(excess < 0.0009)
-							{
-								break;
-							}
+							if(excess < 0.0009) break;
 						}
 					}
 				}
@@ -1118,72 +1143,42 @@ EndUI()
 		// Calculate final sizes
 		{
 			f32 pos = 0.0;
-			for(UIItem* item = ctx.root; !Nil(item);)
+			for(UIItem* item = ctx.root; !Nil(item); item = Recurse!(true)(item, g_UI_NIL))
 			{
+				item.last_relative_item = g_UI_NIL;
+
 				bool    fixed  = cast(bool)(item.flags & UIF.FixedPosition);
-
-				bool first_child_fixed = item.parent.flags & UIF.FixedPosition && item == item.parent.first;
-				bool on_layout_axis    = item.parent.layout_axis == axis;
-				if(!on_layout_axis || first_child_fixed)
-				{
-					pos = item.parent.rect.p0.v[axis] + item.parent.padding.v[axis];
-				}
-
-				if(item.view_offset.x != 0.0 || item.view_offset.y != 0.0)
-				{
-					for(UIItem* c = item.first; !Nil(c); c = c.next)
-					{
-						if(!(c.flags & UIF.FixedPosition))
-						{
-							c.pos_offset = item.view_offset;
-							break;
-						}
-					}
-				}
-
-				f32 next_pos = 0.0;
+				UIItem* parent = item.parent;
 				if(fixed)
 				{
-					item.rect.p0.v[axis] = item.fixed_pos.v[axis] + item.parent.rect.p0.v[axis];
-					item.rect.p1.v[axis] = item.rect.p0.v[axis] + item.size.v[axis];
-
-					next_pos = pos;
+					item.rect.p0.v[axis] = parent.rect.p0.v[axis] + item.fixed_pos.v[axis] + item.padding.v[axis] + parent.view_offset.v[axis];
+					item.rect.p1.v[axis] = item.rect.p0.v[axis]   + item.size.v[axis]      - item.padding.v[axis];
+				}
+				else if(Nil(item.parent.last_relative_item))
+				{
+					item.rect.p0.v[axis] = parent.rect.p0.v[axis] + item.padding.v[axis] + parent.view_offset.v[axis];
+					item.rect.p1.v[axis] = item.rect.p0.v[axis]   + item.size.v[axis]    - item.padding.v[axis];
+				}
+				else if(axis != item.parent.layout_axis)
+				{
+					item.rect.p0.v[axis] = parent.rect.p0.v[axis] + parent.view_offset.v[axis] + item.padding.v[axis];
+					item.rect.p1.v[axis] = parent.rect.p0.v[axis] + item.size.v[axis]          - item.padding.v[axis];
 				}
 				else
 				{
-					item.rect.p0.v[axis] = pos + item.pos_offset.v[axis];
-					item.rect.p1.v[axis] = item.rect.p0.v[axis] + item.size.v[axis];
+					UIItem* prev = parent.last_relative_item;
 
-					next_pos = item.parent.layout_axis == axis ? item.rect.p1.v[axis] : item.rect.p0.v[axis];
+					item.rect.p0.v[axis] = prev.rect.p1.v[axis] + prev.padding.v[axis] + item.padding.v[axis];
+					item.rect.p1.v[axis] = item.rect.p0.v[axis] + item.size.v[axis]    - item.padding.v[axis];
+				}
+
+				if(!fixed && !Nil(parent))
+				{
+					parent.last_relative_item = item;
 				}
 
 				assert(!isNaN(item.rect.p0.v[axis]));
 				assert(!isNaN(item.rect.p1.v[axis]));
-
-				if(!Nil(item.first))
-				{
-					item = item.first;
-				}
-				else if(!Nil(item.next))
-				{
-					item = item.next;
-					pos  = next_pos;
-				}
-				else for(UIItem* p = item.parent;; p = p.parent)
-				{
-					if(!Nil(p.next))
-					{
-						item = p.next;
-						pos  = item.parent.layout_axis == axis ? item.prev.rect.p1.v[axis] : item.parent.rect.p0.v[axis];
-						break;
-					}
-
-					if(Nil(p))
-					{
-						item = g_UI_NIL;
-						break;
-					}
-				}
 			}
 		}
 	}
@@ -1237,6 +1232,10 @@ void
 RenderItem(UICtx* ctx, UIItem* item)
 {
 	if(item.rendered)              return;
+	if(!(item.flags & DRAW_FLAGS)) return;
+
+	Vec2 p0 = item.rect.p0 - item.padding;
+	Vec2 p1 = item.rect.p1 + item.padding;
 
 	// Doesn't really support nesting scissors, will maybe change this later.
 	bool scissor_x = cast(bool)(item.flags & UIF.PortalViewX);
@@ -1245,18 +1244,18 @@ RenderItem(UICtx* ctx, UIItem* item)
 	{
 		DrawUI(ctx);
 
-		u32 x = cast(u32)(scissor_x ? floor(item.rect.p0.x)     : 0);
-		u32 y = cast(u32)(scissor_y ? floor(item.rect.p0.y)     : 0);
-		u32 w = cast(u32)(scissor_x ? floor(item.rect.p1.x) - x : ctx.res.x);
-		u32 h = cast(u32)(scissor_y ? floor(item.rect.p1.y) - y : ctx.res.y);
+		u32 x = cast(u32)(scissor_x ? floor(p0.x)     : 0);
+		u32 y = cast(u32)(scissor_y ? floor(p0.y)     : 0);
+		u32 w = cast(u32)(scissor_x ? floor(p1.x) - x : ctx.res.x);
+		u32 h = cast(u32)(scissor_y ? floor(p1.y) - y : ctx.res.y);
 		SetScissor(&ctx.rd, x, y, w, h);
 	}
 
 	if(item.flags & UIF.DrawBackground)
 	{
 		Vertex* v       = GetVertex(ctx);
-		v.dst_start     = item.rect.p0 + item.border_thickness;
-		v.dst_end       = item.rect.p1 - item.border_thickness;
+		v.dst_start     = p0 + item.border_thickness;
+		v.dst_end       = p1 - item.border_thickness;
 		v.cols          = item.bg_col;
 		v.corner_radius = item.flags & UIF.DrawBorder ? item.corner_radius*0.5 : item.corner_radius;
 		v.bounds        = ItemBounds(item.parent);
@@ -1267,8 +1266,8 @@ RenderItem(UICtx* ctx, UIItem* item)
 	if(item.flags & UIF.DrawBorder)
 	{
 		Vertex* v          = GetVertex(ctx);
-		v.dst_start        = item.rect.p0;
-		v.dst_end          = item.rect.p1;
+		v.dst_start        = p0;
+		v.dst_end          = p1;
 		v.cols             = item.border_col;
 		v.corner_radius    = item.corner_radius;
 		v.border_thickness = clamp(item.border_thickness, 1.0, f32.max);
@@ -1286,27 +1285,25 @@ RenderItem(UICtx* ctx, UIItem* item)
 		}
 		else
 		{
-			// The math around all this is fucked
-			FontAtlas* atl     = &ctx.atlas_buf.atlas;
-			f32 y_pos          = item.rect.p0.y + item.padding.y;
+			FontGlyphs* fg     = GetFontGlyphs(item.text_size);
+			f32    y_pos       = p0.y + fg.abuf.atlas.line_height;
 			Vec4[] syntax_cols = ctx.syntax_colors[item.syntax_highlight];
 
 			foreach(i; 0 .. item.text_lines.length)
 			{
 				string str = item.text_lines[i];
 				u8[]   tks = item.token_lines.length ? item.token_lines[i] : [];
-				f32 x_pos  = item.flags & UIF.RightAlignText ? item.rect.p1.x - item.padding.x - CalcTextWidth(str) : 
-				item.rect.p0.x + item.padding.x;
+				f32 x_pos  = item.flags & UIF.RightAlignText ? p1.x - item.padding.x - CalcTextWidth(str, &fg.abuf) : p0.x + item.padding.x;
 
-				x_pos = clamp(x_pos, item.rect.p0.x, item.rect.p1.x);
+				x_pos = clamp(x_pos, p0.x, p1.x);
 
 				if(tks.length)
 				{
 					foreach(j; 0 .. str.length)
 					{
 						u8     ch = str[j];
-						Glyph* g  = ch < atl.glyphs.length ? atl.glyphs.ptr + ch : null;
-						DrawGlyph(item, g, &x_pos, y_pos, syntax_cols[tks[j]]);
+						Glyph* g  = ch < fg.abuf.atlas.glyphs.length ? fg.abuf.atlas.glyphs.ptr + ch : null;
+						DrawGlyph(item, g, fg.index, &x_pos, y_pos, syntax_cols[tks[j]]);
 					}
 				}
 				else
@@ -1314,12 +1311,12 @@ RenderItem(UICtx* ctx, UIItem* item)
 					foreach(j; 0 .. str.length)
 					{
 						u8     ch = str[j];
-						Glyph* g  = ch < atl.glyphs.length ? atl.glyphs.ptr + ch : null;
-						DrawGlyph(item, g, &x_pos, y_pos, item.text_col);
+						Glyph* g  = ch < fg.abuf.atlas.glyphs.length ? fg.abuf.atlas.glyphs.ptr + ch : null;
+						DrawGlyph(item, g, fg.index, &x_pos, y_pos, item.text_col);
 					}
 				}
 
-				y_pos += TEXT_SIZE;
+				y_pos += fg.abuf.atlas.line_height;
 			}
 		}
 	}
@@ -1376,6 +1373,17 @@ StackIDs(string stack, string ctx = "ctx")
 	};
 }
 
+void
+PushSizeInfo(SizeType type0, f32 value0, f32 strictness0, SizeType type1, f32 value1, f32 strictness1, bool auto_pop = false)
+{
+	UISize[2] size_info = [
+		UISize(type0, value0, strictness0),
+		UISize(type1, value1, strictness1),
+	];
+
+	Push!("size_info")(size_info, auto_pop);
+}
+
 void
 PushSizeInfoVec(int i)(SizeType type, f32 value, f32 strictness = 1.0, bool auto_pop = false)
 {
@@ -1463,24 +1471,52 @@ PushScrollTargetY(f32 target, bool auto_pop = false)
 	PushScrollTarget(Vec2(0.0, target), auto_pop);
 }
 
+static string
+PushScope(string stack, string value)()
+{
+	import std.conv;
+	return i"Push!(\"$(stack)\")($(value)); scope(exit) Pop!(\"$(stack)\")();".text;
+}
+
+static string
+PushOnce(UIPushInfo[] info)()
+{
+	import std.conv;
+
+	string result = "";
+	static foreach(i; info)
+	{
+		result ~= i"Push!(\"$(i.s)\")($(i.v), true); scope(exit) Pop!(\"$(i.s)\")();".text;
+	}
+
+	return result;
+}
+
+struct UIPushInfo
+{
+	string s;  // stack
+	string v;  // value
+}
+
 void
 Push(string stack_str, T)(T value, bool auto_pop = false)
 {
 	import std.string : replace;
 	
 	enum ids = StackIDs!(stack_str, "g_ui_ctx");
+	alias ST = typeof(mixin(ids.stack ~ ".top.value"));
 
 	auto stack = &mixin(ids.stack);
 	auto top   = mixin(ids.stack_top_node);
 
-	Stack!(T)* node = stack.free;
+	Stack!(ST)* node = stack.free;
 	if(node)
 	{
 		stack.free = node.next;
 	}
 	else
 	{
-		node = Alloc!(Stack!(T))(&g_ui_ctx.temp_arena);
+		node = Alloc!(Stack!(ST))(&g_ui_ctx.temp_arena);
 	}
 
 	node.next     = stack.top;
@@ -1762,11 +1798,10 @@ NewItem(UICtx* ctx)
 {
 	UIItem* item = g_UI_NIL;
 
-	if(!Nil(ctx.free_items.first))
-	{
+	debug ctx.item_count += 1;
+
 	item = DLLPop(ctx.free_items, g_UI_NIL);
-	}
-	else
+	if(Nil(item))
 	{
 		item = Alloc!(UIItem)(&ctx.arena);
 	}
@@ -1807,6 +1842,7 @@ Get(T)(T k) if(is(T: UIKey) || StringType!T)
 		Result!(UIItem*) res = ctx.items[key.hash];
 		if(res.ok)
 		{
+			debug ctx.item_count += 1;
 			item = res.value;
 		}
 		else
@@ -1823,7 +1859,7 @@ Get(T)(T k) if(is(T: UIKey) || StringType!T)
 }
 
 f32
-CalcTextWidth(T)(T text) if(is(T == string) || StringType!T)
+CalcTextWidth(bool fast = true, T, U)(T text, U param) if((is(T == string) || StringType!T) && (is(U: u32) || is(U == FontAtlasBuf*) ))
 {
 	static if(is(T == string))
 	{
@@ -1834,42 +1870,63 @@ CalcTextWidth(T)(T text) if(is(T == string) || StringType!T)
 		string str = ConvToStr(text);
 	}
 
-	u32    tab_width = g_ui_ctx.tab_width;
-	Glyph* space     = g_ui_ctx.atlas_buf.atlas.glyphs.ptr + ' ';
+	static if(is(U: u32))
+	{
+		FontAtlasBuf* abuf = GetFontAtlas(param);
+	}
+	else
+	{
+		FontAtlasBuf* abuf = param;
+	}
 
+	u32      tab_width = g_ui_ctx.tab_width;
+
+	static if(fast)
+	{
+		f32 width = str.length * abuf.atlas.max_advance;
+		assert(abuf.atlas.max_advance > 0.0009);
+	}
+	else
+	{
 		f32 width = 0.0;
 		for(u64 i = 0; i < str.length; i += 1)
 		{
-		width += GlyphWidth(g_ui_ctx.atlas_buf.atlas.glyphs.ptr + str.ptr[i]);
+			width += GlyphWidth(abuf.atlas.glyphs.ptr + str.ptr[i], abuf);
+		}
 	}
 
 	return width;
 }
 
 pragma(inline) f32
-GlyphWidth(Glyph* g)
+GlyphWidth(Glyph* g, FontAtlasBuf* abuf)
 {
-	return g.ch == '\t' ? (g_ui_ctx.atlas_buf.atlas.glyphs[' '].advance*cast(f32)(g_ui_ctx.tab_width)) : g.advance;
+	return g.ch == '\t' ? (abuf.atlas.glyphs[' '].advance*cast(f32)(g_ui_ctx.tab_width)) : g.advance;
 }
 
 void
-DrawGlyph(UIItem* item, Glyph* glyph, f32* x_pos, f32 y, Vec4 col = Vec4(1.0))
+DrawGlyph(UIItem* item, Glyph* glyph, u32 atlas_index, f32* x_pos, f32 y, Vec4 col = Vec4(1.0))
 {
 	if(glyph)
 	{
 		UICtx* ctx  = GetCtx();
 		Vertex* v   = null;
-		f32 advance = glyph.advance * item.text_scale;
+		f32 advance = glyph.advance;
 
-		if(glyph.ch == '\t')
+		if(glyph.ch == ' ' || glyph.ch == '\n')
+		{
+			*x_pos += advance;
+		}
+		else if(glyph.ch == '\t')
 		{
 			*x_pos += advance * (GetCtx().tab_width - 1);
 		}
-
-		f32 r = glyph.plane_right  * item.text_scale;
-		f32 l = glyph.plane_left   * item.text_scale;
-		f32 t = glyph.plane_top    * item.text_scale;
-		f32 b = glyph.plane_bottom * item.text_scale;
+		else
+		{
+			f32 r = glyph.plane_right;
+			f32 l = glyph.plane_left;
+			f32 t = glyph.plane_top;
+			f32 b = glyph.plane_bottom;
 
 			GlyphBounds gb = {
 				r:       r,
@@ -1886,13 +1943,14 @@ DrawGlyph(UIItem* item, Glyph* glyph, f32* x_pos, f32 y, Vec4 col = Vec4(1.0))
 
 			v = ctx.buffers[ctx.f_idx].vtx.ptr + ctx.buffers[ctx.f_idx].count;
 
-		f32 y_pos = (y - gb.t) + TEXT_SIZE;
+			f32 y_pos = y + gb.t;
 
 			v.dst_start   = Vec2(*x_pos+gb.l,      y_pos);
 			v.dst_end     = Vec2(*x_pos+gb.w+gb.l, y_pos+gb.h);
 			v.cols        = col;
 			v.texture     = true;
 			v.bounds      = ItemBounds(item);
+			v.atlas_index = atlas_index;
 
 			if(glyph.ch != '\t' && glyph.ch != '\n')
 			{
@@ -1910,7 +1968,8 @@ DrawGlyph(UIItem* item, Glyph* glyph, f32* x_pos, f32 y, Vec4 col = Vec4(1.0))
 				v.src_end.x -= (v.src_end.x - v.src_start.x) * cull_pct;
 			}
 
-		f32 end_y  = y + TEXT_SIZE;
+			/*
+			f32 end_y  = y;
 			f32 height = end_y - y;
 			if(end_y > item.rect.p1.y)
 			{
@@ -1918,6 +1977,7 @@ DrawGlyph(UIItem* item, Glyph* glyph, f32* x_pos, f32 y, Vec4 col = Vec4(1.0))
 				v.dst_end.y -= (v.dst_end.y - v.dst_start.y) * cull_pct;
 				v.src_end.y -= (v.src_end.y - v.src_start.y) * cull_pct;
 			}
+			*/
 
 			static foreach(axis; A2D.min .. A2D.max)
 			{
@@ -1931,6 +1991,7 @@ DrawGlyph(UIItem* item, Glyph* glyph, f32* x_pos, f32 y, Vec4 col = Vec4(1.0))
 
 			*x_pos += advance;
 		}
+	}
 }
 
 pragma(inline) Vec2[2]
@@ -1952,30 +2013,23 @@ GetVertex(UICtx* ctx)
 }
 
 static UISize[2]
-MakeUISize(UISize x, UISize y)
+UIS2(SizeType t0 = ST.Percentage, SizeType t1 = ST.Percentage, f32 v0 = 1.0, f32 v1 = 1.0, f32 s0 = 1.0, f32 s1 = 1.0)
 {
-	return [x, y];
+	return [UISize(t0, v0, s0), UISize(t1, v1, s1)];
 }
 
 static UISize[2]
-MakeUISizeX(SizeType type, f32 value, f32 strictness = 1.0)
+UISX(SizeType type, f32 value = 1.0, f32 strictness = 1.0)
 {
 	return [UISize(type, value, strictness), UISize(ST.Percentage, 1.0)];
 }
 
 static UISize[2]
-MakeUISizeY(SizeType type, f32 value, f32 strictness = 1.0)
+UISY(SizeType type, f32 value = 1.0, f32 strictness = 1.0)
 {
 	return [UISize(ST.Percentage, 1.0), UISize(type, value, strictness)];
 }
 
-pragma(inline) Glyph*
-GetGlyph(u8 ch)
-{
-	FontAtlas* a = &g_ui_ctx.atlas_buf.atlas;
-	return ch < a.glyphs.length ? a.glyphs.ptr + ch : a.glyphs.ptr;
-}
-
 pragma(inline) void
 AddVertexCount(UICtx* ctx)
 {

src/editor/views.d

@@ -31,84 +31,105 @@ struct Panel
 	Axis2D  layout_axis;
 	Editor* ed;
 	u64     id;
+	u32     text_size;
 }
 
 void
-LineCounterView(u64 max_line, u64 lines, i64 line_offset, f32 view_offset)
+LineCounterView(FontAtlasBuf* abuf, u64 max_line, u64 lines, i64 line_offset, f32 view_offset)
 {
 	UICtx* ctx  = GetCtx();
 	UIKey  zero = ZeroKey();
 
 	u64 ch_width = max_line.toChars().length;
-	f32 lc_width = cast(f32)(ch_width+1)*ctx.char_width; // Should figure out how to accurately measure text width
+	f32 lc_width = cast(f32)(ch_width+1)*abuf.atlas.max_advance;
 
-	PushLayoutAxis(A2D.Y, true);
-	PushViewOffsetY(view_offset, true);
-	PushPaddingX(4.0, true);
-	PushSizeInfoX(ST.Pixels, lc_width, 1.0, true);
+	enum UIPushInfo[] lc_params = [
+		{ "layout_axis", q{ A2D.Y } },
+		{ "view_offset", q{ Vec2(0.0, view_offset) } },
+		{ "padding",     q{ Vec2(8.0) } },
+		{ "size_info",   q{ UISX(ST.Pixels, lc_width) }},
+	];
+
+	mixin(PushOnce!(lc_params));
 
 	UIItem* line_count = MakeItem(zero, UIF.DrawBorder|UIF.PortalViewY);
 
-	PushTextCol(Vec4(1.0));
-	PushSizeInfoY(ST.Pixels, TEXT_SIZE);
-	PushParent(line_count);
+	mixin(PushScope!("text_col",  q{ Vec4(1.0) } ));
+	mixin(PushScope!("size_info", q{ UISY(ST.Pixels, abuf.atlas.line_height) } ));
+	mixin(PushScope!("parent",    q{ line_count } ));
 
 	u64 end_line = lines+line_offset;
 	for(u64 i = line_offset; i < end_line && i < max_line; i += 1)
 	{
 		char[] buf = ScratchAlloc!(char)(ch_width);
-		Push!("display_string")(ConvToStr(sformat(buf, "%s", i)), true);
+		Push!("display_string")(ConvToStr(sformat(ScratchAlloc!(char)(ch_width), "%s", i)), true);
 		MakeItem(zero, UIF.DrawText);
 	}
-
-	Pop!("text_col", "size_info", "parent");
 }
 
 void
-EditorTextView(UIItem* editor, Panel* p, u64 lines, i64 line_offset, f32 view_offset)
+EditorTextView(UIItem* editor, Panel* p, FontAtlasBuf* abuf, u64 lines, i64 line_offset, f32 view_offset)
 {
 	Editor* ed = p.ed;
 
 	PushLayoutAxis(A2D.Y, true);
 
-	f32 clamp_y    = cast(f32)(ed.buf.line_count-lines)*TEXT_SIZE;
-	f32 scroll_pos = cast(f32)(ed.line_offset)*TEXT_SIZE; 
+	f32 text_size  = cast(f32)p.text_size;
+	f32 clamp_y    = cast(f32)(ed.buf.line_count-lines)*text_size;
+	f32 scroll_pos = cast(f32)(ed.line_offset)*text_size; 
+	f32 padding    = 8.0;
 
-	PushLayoutAxis(A2D.Y, true);
-	PushScrollClampY(0.0, clamp_y, true);
-	PushSizeInfo(g_size_info_default, true);
-	PushBorderCol(Vec4(1.0), true);
-	PushScrollTargetY(scroll_pos, true);
-	PushViewOffsetY(view_offset, true);
+	enum UIPushInfo[] text_view_params = [
+		{ "layout_axis",   q{ A2D.Y }                  },
+		{ "border_col",    q{ Vec4(1.0) }              },
+		{ "size_info",     q{ UIS2() }                 },
+		{ "scroll_target", q{ Vec2(0.0, scroll_pos) }  },
+		{ "scroll_clamp",  q{ Vec2(0.0, clamp_y) }     },
+		{ "view_offset",   q{ Vec2(0.0, view_offset) } },
+		{ "padding",       q{ Vec2(padding) }          },
+	];
+	mixin(PushOnce!(text_view_params));
 
 	editor = MakeItem(editor.key, UIF.DrawBorder|UIF.ScrollY|UIF.ClampY);
 
-	PushParent(editor);
+	mixin(PushScope!("parent", q{ editor }));
+
 	UIKey zero = ZeroKey();
 
 	// Cursor
 	{
 		LineBuffer* lb = GetLine(&ed.buf, ed.cursor_pos.y);
 
-		f32 cursor_x = CalcTextWidth(lb.text[0 .. ed.cursor_pos.x]);
-		f32 cursor_y = cast(f32)(ed.cursor_pos.y - line_offset)*TEXT_SIZE + view_offset;
-		PushSizeInfo(MakeUISize(UISize(ST.Pixels, GetCtx().char_width), UISize(ST.Pixels, TEXT_SIZE)), true);
-		PushFixedPos(Vec2(cursor_x, cursor_y), true);
-		PushBgCol(Vec4(1.0), true);
+		u8  ch       = lb.text.length > ed.cursor_pos.y ? lb.text[ed.cursor_pos.y] : 0;
+		f32 line_h   = abuf.atlas.line_height;
+		f32 cursor_x = CalcTextWidth!(false)(lb.text[0 .. ed.cursor_pos.x], abuf);
+		f32 cursor_y = cast(f32)(ed.cursor_pos.y - line_offset)*line_h;
+		Glyph* g     = abuf.atlas.glyphs.length > ch ? abuf.atlas.glyphs.ptr + ch : abuf.atlas.glyphs.ptr + ' ';
+
+		enum UIPushInfo[] cursor_info = [
+			{ "size_info", q{ UIS2(ST.Pixels, ST.Pixels, g.advance, line_h) } },
+			{ "fixed_pos", q{ Vec2(cursor_x, cursor_y) }                      },
+			{ "bg_col",    q{ Vec4(1.0) }                                     },
+		];
+		mixin(PushOnce!(cursor_info));
+
 		MakeItem(zero, UIF.DrawBackground|UIF.FixedPosition);
 	}
 
-	u64 end_line = line_offset+lines;
-	PushSizeInfoY(ST.TextSize, 1.0);
-	PushSyntaxHighlight(UISH.D);
+	mixin(PushScope!("size_info",        q{ UISY(ST.TextSize) } ));
+	mixin(PushScope!("syntax_highlight", q{ UISH.D } ));
 
-	scope(exit) Pop!("size_info", "parent", "syntax_highlight");
+	// NEED TO FIX LINES BEING OFFSET FOR WHATEVER REASON
 
 	u64 i = line_offset;
 	for(LineBuffer* lb = GetLine(&ed.buf, i); !CheckNil(g_NIL_LINE_BUF, lb) && i < line_offset+lines; i += 1, lb = GetLine(&ed.buf, i))
 	{
-		PushDisplayString(ConvToStr(lb.text), true);
-		PushSyntaxTokens(cast(u8[])lb.style, true);
+		enum UIPushInfo[] lc_info = [
+			{ "display_string", q{ ConvToStr(lb.text) }   },
+			{ "syntax_tokens",  q{ cast(u8[])(lb.style) } },
+		];
+		mixin(PushOnce!(lc_info));
+
 		UIItem* line = MakeItem(zero, UIF.DrawText);
 	}
 }
@@ -119,6 +140,7 @@ EditorView(Panel* p)
 	Editor*       ed   = p.ed; 
 	UICtx*        ctx  = GetCtx();
 	UIKey         zero = ZeroKey();
+	FontAtlasBuf* abuf = GetFontAtlas(p.text_size);
 
 	if(CheckNil(g_NIL_ED, ed))
 	{
@@ -132,24 +154,26 @@ EditorView(Panel* p)
 		UIKey   ed_key = MakeKey("###ed_%s", ed.editor_id);
 		UIItem* editor = Get(ed_key);
 
-		u64 frame_line_offset = ed.line_offset;
-		f32 frame_view_offset = -(editor.scroll_offset.y%TEXT_SIZE);
+		f32 text_size = abuf.atlas.line_height;
 
-		PushBgCol(BG_COL, true);
-		PushSizeInfoX(ST.Percentage, 1.0, 1.0, true);
+		u64 frame_line_offset = ed.line_offset;
+		f32 frame_view_offset = -(editor.scroll_offset.y%text_size);
+
+		enum UIPushInfo[] c_info = [
+			{ "bg_col",    q{ BG_COL } },
+			{ "size_info", q{ UIS2() } },
+		];
+		mixin(PushOnce!(c_info));
 
 		UIItem* container = MakeItem(zero, UIF.DrawBackground);
 
-		PushParent(container);
-		PushBorderCol(Vec4(1.0));
-
-		scope(exit) Pop!("parent", "border_col");
+		mixin(PushScope!("parent",     q{ container } ));
+		mixin(PushScope!("border_col", q{ Vec4(1.0) } ));
 
 		u64 view_lines;
 		if(editor.size.y > 0.0)
 		{
-			view_lines = cast(u64)ceil(editor.size.y/TEXT_SIZE)+1;
-
+			view_lines = cast(u64)floor(editor.size.y/text_size);
 			const u64 SCROLL_BUFFER = 4;
 
 			u64 start = ed.line_offset;
@@ -166,9 +190,9 @@ EditorView(Panel* p)
 			}	
 		}
 
-		u64 start = cast(u64)floor(editor.scroll_offset.y/TEXT_SIZE);
-		LineCounterView(ed.buf.line_count, view_lines, start, frame_view_offset);
-		EditorTextView(editor, p, view_lines, start, frame_view_offset);
+		u64 start = cast(u64)floor(editor.scroll_offset.y/text_size);
+		LineCounterView(abuf, ed.buf.line_count, view_lines, start, frame_view_offset);
+		EditorTextView(editor, p, abuf, view_lines, start, frame_view_offset);
 
 		for(UIInput* i = ctx.events.first; !CheckNil(g_UI_NIL_INPUT, i) && g_ed_ctx.focused_editor == p.ed; i = i.next)
 		{
@@ -201,6 +225,8 @@ EditorView(Panel* p)
 
 		ed.cursor_pos = VecPos(&ed.buf);
 	}
+
+	ResetBuffer(&ed.buf);
 }
 
 void
@@ -208,348 +234,64 @@ CommandPalette(CmdPalette* cmd)
 {
 	UICtx*         ctx = GetCtx();
 	Vec2           ext = GetExtent();
+	FontAtlasBuf* abuf = &g_ui_ctx.glyph_sets[0].abuf;
 
 	f32 w = ext.x*0.4;
 	f32 h = ext.y*0.7;
 
-	PushFixedPos(Vec2(ext.x*0.3, ext.y*0.1), true);
-	PushBgCol(BG_COL, true);
-	PushBorderCol(HL_BORDER_COL, true);
-	PushBorderThickness(2.0f, true);
-	PushCornerRadius(8.0f, true);
-	PushViewOffset(Vec2(-2.0f), true);
-	PushLayoutAxis(A2D.Y, true);
-	PushSizeInfo(MakeUISize(UISize(ST.Pixels, w), UISize(ST.Pixels, h)));
+	enum UIPushInfo[] cmd_params = [
+		{ "layout_axis",      q{ A2D.Y }                            },
+		{ "fixed_pos",        q{ Vec2(ext.x*0.3, ext.y*0.1) }       },
+		{ "bg_col",           q{ BG_COL }                           },
+		{ "border_col",       q{ HL_BORDER_COL }                    },
+		{ "border_thickness", q{ 4.0 }                              },
+		{ "corner_radius",    q{ Vec4(8.0) }                        },
+		{ "size_info",        q{ UIS2(ST.Pixels, ST.Pixels, w, h) } },
+	];
 
+	mixin(PushOnce!(cmd_params));
 	UIItem* cmd_item = MakeItem("###cmd_palette", UIF.Window|UIF.FixedPosition|UIF.DrawBackground|UIF.DrawBorder);
 
-	f32 padding_y = 8.0;
-	PushParent(cmd_item);
-	PushPadding(Vec2(4.0, padding_y), true);
-	scope(exit) Pop!("parent", "padding")();
+	f32 padding_y = 4.0;
 
-	PushBgCol(HL_BG_COL, true);
-	PushBorderCol(HL_BORDER_COL);
-	PushBorderThickness(2.0f, true);
-	PushCornerRadius(Vec4(8.0, 8.0, 0.0, 0.0), true);
-	PushSizeInfo(MakeUISize(UISize(ST.Pixels, w-padding_y),  UISize(ST.TextSize, 1.0)), true);
-	PushDisplayString(ConvToStr(cmd.buffer[0 .. cmd.icount]), true);
+	mixin(PushScope!("parent",  q{ cmd_item } ));
+	mixin(PushScope!("padding", q{ Vec2(4.0, padding_y) }));
+
+	enum UIPushInfo[] cmd_input_params = [
+		{ "bg_col",         q{ HL_BG_COL }         },
+		{ "size_info",      q{ UISY(ST.TextSize) } },
+		{ "display_string", q{ ConvToStr(cmd.buffer[0 .. cmd.icount]) } },
+	];
+
+	mixin(PushOnce!(cmd_input_params));
 
 	UIKey zero = ZeroKey();
-
 	MakeItem(zero, UIF.DrawBorder|UIF.DrawBackground|UIF.DrawText|UIF.Overflow);
 
-	PushPadding(Vec2(4.0));
-	PushSizeInfoY(ST.TextSize, 1.0);
-	scope(exit) Pop!("size_info", "padding")();
+	enum UIPushInfo[] sep_params = [
+		{ "padding",          q{ Vec2(0.0) }                },
+		{ "size_info",        q{ UISY(ST.Pixels, 4.0) }     },
+		{ "bg_col",           q{ HL_BORDER_COL }            },
+	];
+
+	mixin(PushOnce!(sep_params));
+	MakeItem(zero, UIF.DrawBackground);
+
+	mixin(PushScope!("padding",   q{ Vec2(4.0) }         ));
+	mixin(PushScope!("size_info", q{ UISY(ST.TextSize) } ));
+
+	u64 max_opts = cast(u64)ceil(h/abuf.atlas.line_height);
 
 	Vec4[2] opt_cols = [
 		Vec4(0.22, 0.22, 0.22, 1.0),
 		Vec4(0.35, 0.35, 0.35, 1.0),
 	];
 
-	foreach(i; 0 .. cmd.opt_strs.length)
+	for(u64 i = 0; i < cmd.opt_strs.length && i < max_opts; i += 1)
 	{
 		PushDisplayString(ConvToStr(cmd.opt_strs[i]), true);
 		PushBgCol(cmd.selected == i ? HL_BG_COL : opt_cols[i%2], true);
 		MakeItem(zero, UIF.DrawBackground|UIF.DrawText);
 	}
-
-	//PushDisplayString(ConvToStr(cmd.buffer));
 }
 
-/*
-void
-Panel(UIPanel* panel)
-{
-	UICtx*  ctx  = GetCtx();
-	UIItem* item = Get(panel.id);
-	Editor* ed   = panel.ed;
-	bool focused = GetFocusedPanel() == panel;
-
-	UIPanel* parent = panel.parent;
-	UIPanel* prev   = panel.prev;
-
-	Axis2D pax = parent.axis;
-
-	Vec2 adj = Vec2(
-		parent.axis == A2D.X ? 10 : 0,
-		parent.axis == A2D.Y ? 10 : 0
-	);
-
-	Vec2 p0 = panel.rect.p0+adj;
-	Vec2 p1 = panel.rect.p1-adj;
-	Rect r  = Rect(p0: p0, p1: p1);
-
-	if(!Nil(prev)) with(panel)
-	{
-		Vec2 d0 = rect.p0-adj;
-		Vec2 d1 = Vec2(
-			pax == A2D.X ? rect.p0.x+adj.x : rect.p1.x,
-			pax == A2D.Y ? rect.p0.y+adj.y : rect.p1.y
-		);
-
-		Rect dr = Rect(p0: d0, p1: d1);
-		if(Dragged(item, &dr) && item.dragged.v[pax] != 0.0)
-		{
-			f32 mov_pct = Remap(item.dragged.v[pax], 0.0, panel.parent.size.v[pax], 0.0, 1.0);
-			if(CheckPanelBounds(pct + mov_pct) && CheckPanelBounds(panel.prev.pct - mov_pct))
-			{
-				pct            += mov_pct;
-				panel.prev.pct -= mov_pct;
-			}
-		}
-	}
-
-	if(panel.ed != null)
-	{
-		if(Clicked(item, &r))
-		{
-			SetFocusedPanel(panel);
-		}
-
-		Vec2 inner = InnerSize(panel);
-
-		SetScrollOffset(panel);
-
-		panel.start_ln  = cast(u64)(floor(panel.scroll_offset/TEXT_SIZE));
-		panel.end_ln    = panel.start_ln + cast(u64)(ceil(inner.y/TEXT_SIZE));
-		panel.vis_lines = panel.end_ln - panel.start_ln;
-
-		char[64] ch_buf = '\0';
-		char[]   fmt = ch_buf.sformat("%%0%ss", u64(panel.end_ln.toChars().length));
-
-		f32 lc_w = panel.end_ln.toChars().length*ctx.char_width + LINE_COUNT_PADDING*2.0;
-		f32 code_view_width = inner.x-lc_w;
-
-		StartLineBuffer(&panel.ed.buf, code_view_width);
-
-		U64Vec2 pos = VecPos(&ed.buf);
-
-		DrawPanel(panel, lc_w, focused);
-
-		f32 y_rem = fmod(panel.scroll_offset, TEXT_SIZE);
-
-		f32 x = panel.rect.p0.x;
-		f32 y = panel.rect.p1.y + TEXT_SIZE - fmod(panel.scroll_offset, TEXT_SIZE);
-
-		u64 i = panel.start_ln;
-		for(auto buf = GetLine(&ed.buf, i); !CheckNil(g_NIL_LINE_BUF, buf) && i < panel.end_ln; i += 1, buf = GetLine(&ed.buf, i))
-		{
-			f32 x_pos = x + LINE_COUNT_PADDING;
-			DrawLineCount(fmt, &x_pos, y, i);
-
-			u64 ch_offset;
-
-			auto parts = MakeMultiline(buf.text, code_view_width, buf.style);
-			if(parts == null)
-			{
-				if(pos.y == i)
-				{
-					DrawCursor([], 0, x+lc_w, y, ch_offset);
-				}
-			}
-			else for(auto n = parts; n != null; n = n.next)
-			{
-				auto l = n;
-
-				if(pos.y == i)
-				{
-					DrawCursor(l.text, pos.x, x+lc_w, y, ch_offset);
-				}
-
-				foreach(j; 0 .. l.text.length)
-				{
-					bool hl = pos.y == i && !EditModeActive() && j == pos.x-ch_offset;
-					DrawChar(l.text[j], &x_pos, y, hl ? Vec4(Vec3(0.0), 1.0) : SYNTAX_COLORS[l.style[j]]);
-				}
-
-				y += TEXT_SIZE;
-				x_pos = x + lc_w + LINE_COUNT_PADDING*2.0;
-				ch_offset += l.text.length;
-			}
-		}
-	}
-}
-
-void
-CommandPalette(CmdPalette* cmd)
-{
-	UICtx* ctx = GetCtx();
-
-	u8[]   text    = cmd.buffer[0 .. cmd.icount];
-	u8[][] options = cmd.opt_strs;
-
-	Vec2 size = RootSize();
-
-	f32 x = size.x*0.15;
-	f32 y = size.y*0.1;
-	f32 w = size.x*0.7;
-	f32 h = 40.0;
-
-	DrawCmdRect(Vec2(x, y), Vec2(w, h), false);
-
-	f32 y_off = h*0.5 + 6;
-	f32 ch_x  = x + 6.0;
-	f32 ch_y  = y + y_off;
-
-	foreach(i; 0 .. text.length)
-	{
-		DrawChar(text[i], &ch_x, ch_y, Vec4(1.0));
-	}
-
-	for(u64 i = 0; i < options.length; i += 1)
-	{
-		y   += h;
-		ch_x = x + 6.0;
-		ch_y = y + y_off;
-
-		DrawCmdRect(Vec2(x, y), Vec2(w, h), cmd.selected == i);
-
-		foreach(j; 0 .. options[i].length)
-		{
-			DrawChar(options[i][j], &ch_x, ch_y, Vec4(1.0));
-		}
-
-		if(y+h > size.y+h) break;
-	}
-}
-
-bool
-CheckPanelBounds(f32 pct)
-{
-	return pct >= 0.0 && pct <= 1.0;
-}
-
-void
-PushPanel(UIPanel* parent, UIPanel* panel)
-{
-	DLLPush(parent, panel, g_UI_NIL_PANEL);
-	panel.parent = parent;
-}
-
-void
-InsertPanel(UIPanel* parent, UIPanel* prev, UIPanel* panel)
-{
-	DLLInsert(parent, panel, prev, g_UI_NIL_PANEL);
-	panel.parent = prev.parent;
-}
-
-void
-SetFocusedPanel(UIPanel* panel)
-{
-	if(!CheckNil(g_UI_NIL_PANEL, panel))
-	{
-		g_ui_ctx.focused_panel = panel;
-	}
-}
-
-UIPanel*
-GetFocusedPanel()
-{
-	return Nil(g_ui_ctx.focused_panel) ? g_UI_NIL_PANEL : g_ui_ctx.focused_panel;
-}
-
-TextBuffer*
-MakeMultiline(u8[] text, f32 width, TS[] style = [])
-{
-	f32 scaled_width = width * (g_ui_ctx.atlas_buf.atlas.size/g_ui_ctx.text_size);
-	f32 text_width = CalcTextWidth(text);
-
-	u64 line_count = cast(u64)(ceil(text_width/scaled_width));
-	TextBuffer* node = null;
-	if(line_count > 0)
-	{
-		f32 w = 0.0;
-		u64 line = 0;
-		u64 start = 0;
-		const u64 extra_buf = 20;
-		for(u64 i = 0; i < text.length; i += 1)
-		{
-			f32 ch_w = GlyphWidth(g_ui_ctx.atlas_buf.atlas.glyphs.ptr + text[i]);
-
-			if(ch_w + w > scaled_width || i == text.length-1)
-			{
-				u64 len = i-start+1;
-
-				u8[] str = ScratchAlloc!(u8)(text, start, len);
-
-				TS[] stl = [];
-				if(style.length > 0)
-				{
-					stl = ScratchAlloc!(TS)(style, start, len);
-				}
-
-				TextBuffer* n = node;
-				for(;;)
-				{
-					if(node == null)
-					{
-						node = ScratchAlloc!(TextBuffer)();
-
-						node.text  = str;
-						node.style = stl;
-						node.next        = null;
-
-						break;
-					}
-
-					if(n.next == null)
-					{
-						n.next = ScratchAlloc!(TextBuffer)();
-
-						n.next.text  = str;
-						n.next.style = stl;
-						n.next.next        = null;
-
-						break;
-					}
-
-					n = n.next;
-				}
-
-				line += 1;
-				start = i;
-				w = 0.0;
-			}
-
-			w += ch_w;
-		}
-	}
-
-	return node;
-}
-
-pragma(inline) void
-DrawCursor(u8[] text, u64 ch_x, f32 x, f32 y, u64 offset)
-{
-	Glyph* g = GetGlyph(' ');
-	foreach(j; 0 .. text.length)
-	{
-		bool hl = j == ch_x-offset;
-		if(hl)
-		{
-			break;
-		}
-
-		g = j == text.length-1 ? GetGlyph(' ') : GetGlyph(text[j]);
-		x += GlyphWidth(g);
-	}
-
-	DrawRect(x, y, cast(u8)g.ch, Vec4(1.0), EditModeActive());
-}
-
-pragma(inline) void
-DrawLineCount(char[] fmt, f32* x_pos, f32 y, u64 line)
-{
-	char[32] line_buf = '\0';
-	char[]   line_str = sformat(line_buf, fmt, line+1);
-
-	foreach(j; 0 .. line_str.length)
-	{
-		DrawChar(line_str[j], x_pos, y, Vec4(1.0));
-	}
-
-	*x_pos += LINE_COUNT_PADDING;
-}
-*/

src/shaders/gui.frag.glsl

@@ -5,9 +5,14 @@
 
 #include "gui.layout"
 
-layout (location = 0) flat in uint in_has_texture;
+layout (location = 0) flat in struct FragDataFlatIn
+{
+	uint texture;
+	uint atlas_index;
+} FDF;
 
-layout (location = 1) in struct FragDataIn {
+layout (location = 2) in struct FragDataIn 
+{
 	vec4  color;
 	vec2  uv;
 	vec2  dst_pos;
@@ -20,7 +25,6 @@ layout (location = 1) in struct FragDataIn {
 	float border_thickness;
 } FD;
 
-
 layout (location = 0) out vec4 FragColor;
 
 float RectSDF(vec2 pos, vec2 half_size, float radius)
@@ -75,7 +79,7 @@ void main()
 	vec4 gamma = vec4(1.0/1.4);
 
 	vec4 tex_color = vec4(1.0);
-	if(in_has_texture != 0)
+	if(FDF.texture != 0)
 	{
 		tex_color = texture(sampler2D(SpriteAtlas, SamplerNearest), FD.uv);
 	}

src/shaders/gui.layout

@@ -1,9 +1,11 @@
 layout (rgba16f, set = 0, binding = 0) uniform image2D DrawImage;
 
-layout (set = 1, binding = 0) uniform texture2D SpriteAtlas;
+layout (set = 1, binding = 0) uniform texture2D SpriteAtlasArray[24];
 
 layout (set = 1, binding = 1) uniform sampler SamplerNearest;
 
 layout (push_constant) uniform Constants {
 	mat4 projection;
 } PC;
+
+#define SpriteAtlas SpriteAtlasArray[FDF.atlas_index]

src/shaders/gui.vert.glsl

@@ -17,10 +17,16 @@ layout (location = 9)  in float border_thickness;
 layout (location = 10) in float edge_softness;
 layout (location = 11) in float raised;
 layout (location = 12) in uint  in_has_texture;
+layout (location = 13) in uint  in_atlas_index;
 
-layout (location = 0) flat out uint out_has_texture;
+layout (location = 0) flat out struct FragDataFlatOut
+{
+	uint texture;
+	uint atlas_index;
+} FDF;
 
-layout (location = 1) out struct FragDataOut {
+layout (location = 2) out struct FragDataOut 
+{
 	vec4  color;
 	vec2  uv;
 	vec2  dst_pos;
@@ -31,7 +37,7 @@ layout (location = 1) out struct FragDataOut {
 	float softness;
 	float raised;
 	float border_thickness;
-} FragData;
+} FD;
 
 vec2 Vertices[4] = vec2[4](
 	vec2(-1.0, -1.0),
@@ -77,17 +83,18 @@ void main()
 	vec2 dst_verts_pct = vec2(bool(gl_VertexIndex >> 1) ? 1.0f : 0.0f, 
 													  bool(gl_VertexIndex &  1) ? 0.0f : 1.0f);
 
-	FragData.color            = in_col;
-	FragData.uv               = uvs[gl_VertexIndex] / tex_size;
-	FragData.dst_pos          = pos;
-	FragData.dst_center       = center;
-	FragData.dst_half_size    = half_size;
-	FragData.corner_radius    = corner_radius[gl_VertexIndex];
-	FragData.softness         = edge_softness;
-	FragData.raised           = raised;
-	FragData.border_thickness = border_thickness;
-	FragData.sdf_sample_pos   = (2.0f * dst_verts_pct - 1.0f) * half_size;
-	out_has_texture           = in_has_texture;
+	FD.color            = in_col;
+	FD.uv               = uvs[gl_VertexIndex] / tex_size;
+	FD.dst_pos          = pos;
+	FD.dst_center       = center;
+	FD.dst_half_size    = half_size;
+	FD.corner_radius    = corner_radius[gl_VertexIndex];
+	FD.softness         = edge_softness;
+	FD.raised           = raised;
+	FD.border_thickness = border_thickness;
+	FD.sdf_sample_pos   = (2.0f * dst_verts_pct - 1.0f) * half_size;
+	FDF.texture         = in_has_texture;
+	FDF.atlas_index     = in_atlas_index;
 
 	vec4 v_pos = PC.projection * vec4(pos.x, pos.y, 0, 1);
 	gl_Position = vec4(v_pos.x, v_pos.y, v_pos.z, 1);