top level render caller controlling layout directly

4coder_API/4coder_types.h

@@ -630,50 +630,6 @@ STRUCT File_Attributes{
     u64 last_write_time;
 };
 
-/* DOC(Buffer_Summary acts as a handle to a buffer and describes the state of the buffer.)
-DOC_SEE(Access_Flag)
-DOC_SEE(Dirty_State) */
-STRUCT Buffer_Summary{
-    /* DOC(This field indicates whether the Buffer_Summary describes a buffer that is open in 4coder. When this field is false the summary is referred to as a "null summary".) */
-    b32 exists;
-    /* DOC(If this is not a null summary, this field indicates whether the buffer has finished loading.) */
-    b32 ready;
-    /* DOC(If this is not a null summary this field is the id of the associated buffer. If this is a null summary then buffer_id is 0.) */
-    Buffer_ID buffer_id;
-    /* DOC(If this is not a null summary, this field contains flags describing the protection status of the buffer.) */
-    Access_Flag lock_flags;
-    
-    /* DOC(TODO) */
-    Buffer_Edit_Handler *edit_handler;
-    
-    /* DOC(If this is not a null summary, this field specifies the number of bytes in the buffer.) */
-    i32 size;
-    /* DOC(If this is not a null summary, this field specifies the number of lines in the buffer.) */
-    i32 line_count;
-    
-    /* DOC(If this is not a null summary, this field specifies the file name associated to this buffer.) */
-    char *file_name;
-    /* DOC(This field specifies the length of the file_name string.) */
-    i32 file_name_len;
-    
-    /* DOC(If this is not a null summary, this field specifies the name of the buffer.) */
-    char *buffer_name;
-    /* DOC(This field specifies the length of the buffer_name string.) */
-    i32 buffer_name_len;
-    
-    /* DOC(This field indicates the dirty state of the buffer.) */
-    Dirty_State dirty;
-    
-    /* DOC(If this is not a null summary, this field indicates whether the buffer is set to lex tokens.) */
-    b32 is_lexed;
-    /* DOC(If this is not a null summary, this field indicates whether the buffer has up to date tokens available. If this field is false, it may simply mean the tokens are still being generated in a background task and will be available later.  If that is the case, is_lexed will be true to indicate that the buffer is trying to get it's tokens up to date.) */
-    b32 tokens_are_ready;
-    /* DOC(If this is not a null summary, this field specifies the id of the command map for this buffer.) */
-    i32 map_id;
-    /* DOC(If this is not a null summary, this field indicates whether the buffer 'prefers' wrapped lines.) */
-    b32 unwrapped_lines;
-};
-
 /*
 DOC(A markers is a location in a buffer that, once placed, is effected by edits the same way characters are effected.  In particular if an edit occurs in a location in the buffer before a marker, the marker is shifted forward or backward so that it remains on the same character.)
 DOC_SEE(buffer_add_markers)
@@ -1067,14 +1023,6 @@ STRUCT Frame_Info{
 
 TYPEDEF_FUNC void Render_Callback(struct Application_Links *app);
 
-STRUCT Render_Parameters{
-    Frame_Info frame;
-    View_ID view_id;
-    Range on_screen_range;
-    Rect_i32 buffer_region;
-    Render_Callback *do_core_render;
-};
-
 /* DOC(Hook_IDs name the various hooks in 4coder, these hooks use the Hook_Function signature.)
 DOC_SEE(Hook_Function) */
 ENUM(i32, Hook_ID){
@@ -1125,8 +1073,8 @@ ENUM(i32, Special_Hook_ID){
 TYPEDEF_FUNC i32 Command_Caller_Hook_Function(struct Application_Links *app, Generic_Command cmd);
 #define COMMAND_CALLER_HOOK(name) i32 name(struct Application_Links *app, Generic_Command cmd)
 
-TYPEDEF_FUNC void Render_Caller_Function(struct Application_Links *app, Render_Parameters render_params);
+TYPEDEF_FUNC void Render_Caller_Function(struct Application_Links *app, Frame_Info frame_info);
-#define RENDER_CALLER_SIG(name) void name(struct Application_Links *app, Render_Parameters render_params)
+#define RENDER_CALLER_SIG(name) void name(struct Application_Links *app, Frame_Info frame_info)
 
 TYPEDEF_FUNC i32 Hook_Function(struct Application_Links *app);
 #define HOOK_SIG(name) i32 name(struct Application_Links *app)

4coder_api_transition_30_31.cpp

@@ -3,7 +3,7 @@
  *
  * In order to keep your layer on the old API you don't have to do anything, this provides wrappers
  *  idential to the 4.0.30 API.
- * In order to transition your entire layer over to the 4.0.31 API define 'REMOVE_TRANSITION_HELPER' and fix errors.
+ * In order to transition your entire layer over to the 4.0.31 API define 'REMOVE_TRANSITION_HELPER_31' and fix errors.
  * Or you can do it step by step by removing a few wrappers at a time.
  * This transition helper will be removed in a future version so it is recommended to get off sooner or laster.
  *
@@ -22,10 +22,41 @@
 
 // TOP
 
-#if !defined(REMOVE_TRANSITION_HELPER)
+#if !defined(REMOVE_TRANSITION_HELPER_31)
 
 typedef b32 bool32;
 
+static b32
+get_buffer_summary(Application_Links *app, Buffer_ID buffer_id, Access_Flag access, Buffer_Summary *buffer){
+    b32 result = false;
+    if (buffer_exists(app, buffer_id)){
+        Access_Flag buffer_access_flags = 0;
+        buffer_get_access_flags(app, buffer_id, &buffer_access_flags);
+        if ((buffer_access_flags & ~access) == 0){
+            result = true;
+            buffer->exists = true;
+            buffer->ready = buffer_ready(app, buffer_id);
+            buffer->buffer_id = buffer_id;
+            buffer_get_size(app, buffer_id, &buffer->size);
+            buffer_get_line_count(app, buffer_id, &buffer->line_count);
+            String file_name = make_fixed_width_string(buffer->file_name);
+            buffer_get_file_name(app, buffer_id, &file_name, 0);
+            buffer->file_name_len = file_name.size;
+            String buffer_name = make_fixed_width_string(buffer->buffer_name);
+            buffer_get_unique_buffer_name(app, buffer_id, &buffer_name, 0);
+            buffer->buffer_name_len = buffer_name.size;
+            buffer_get_dirty_state(app, buffer_id, &buffer->dirty);
+            buffer_get_setting(app, buffer_id, BufferSetting_Lex, &buffer->is_lexed);
+            buffer->tokens_are_ready = buffer_tokens_are_ready(app, buffer_id);
+            buffer_get_setting(app, buffer_id, BufferSetting_MapID, &buffer->map_id);
+            buffer_get_setting(app, buffer_id, BufferSetting_WrapLine, &buffer->unwrapped_lines);
+            buffer->unwrapped_lines = !buffer->unwrapped_lines;
+            buffer->lock_flags = buffer_access_flags;
+        }
+    }
+    return(result);
+}
+
 static b32
 exec_system_command(Application_Links *app, View_Summary *view, Buffer_Identifier buffer_id,
                     char *path, int32_t path_len, char *command, i32 command_len, Command_Line_Interface_Flag flags){
@@ -312,7 +343,7 @@ static View_Summary
 get_view_first(Application_Links *app, Access_Flag access){
     View_Summary view = {};
     View_ID view_id = 0;
-    if (get_view_first(app, access, &view_id)){
+    if (get_view_next(app, 0, access, &view_id)){
         get_view_summary(app, view_id, access, &view);
     }
     return(view);

4coder_api_transition_30_31.h

@@ -0,0 +1,71 @@
+/*
+ * Helpers for the API transition from 4.0.30 to 4.0.31
+ *
+ * In order to keep your layer on the old API you don't have to do anything, this provides wrappers
+ *  idential to the 4.0.30 API.
+ * In order to transition your entire layer over to the 4.0.31 API define 'REMOVE_TRANSITION_HELPER_31' and fix errors.
+ * Or you can do it step by step by removing a few wrappers at a time.
+ * This transition helper will be removed in a future version so it is recommended to get off sooner or laster.
+ *
+ * Tips on transitioning:
+*
+* Wrather than just try to inline this code everywhere, you can simplify things quite a lot by storing references
+* to buffers and views and Buffer_ID and View_ID instead of Buffer_Summary and View_Summary.
+ * Just get the summaries when you need information in those structures.
+ *
+ * You will make your code simpler if you stick to String as much as possible, but whenever you want to you can switch
+ * to any string type you have to String by calling make_string(char_ptr, length) or make_string_slowly(null_terminated_c_str).
+ * To pull the char ptr and length out of a String named "string": string.str and str.size.
+ * If you need a null terminated string from a String use get_null_terminated in 4coder_helper.cpp
+ *
+ */
+
+// TOP
+
+#if !defined(REMOVE_TRANSITION_HELPER_31)
+
+/* DOC(Buffer_Summary acts as a handle to a buffer and describes the state of the buffer.)
+DOC_SEE(Access_Flag)
+DOC_SEE(Dirty_State) */
+STRUCT Buffer_Summary{
+    /* DOC(This field indicates whether the Buffer_Summary describes a buffer that is open in 4coder. When this field is false the summary is referred to as a "null summary".) */
+    b32 exists;
+    /* DOC(If this is not a null summary, this field indicates whether the buffer has finished loading.) */
+    b32 ready;
+    /* DOC(If this is not a null summary this field is the id of the associated buffer. If this is a null summary then buffer_id is 0.) */
+    Buffer_ID buffer_id;
+    /* DOC(If this is not a null summary, this field contains flags describing the protection status of the buffer.) */
+    Access_Flag lock_flags;
+    
+    /* DOC(If this is not a null summary, this field specifies the number of bytes in the buffer.) */
+    i32 size;
+    /* DOC(If this is not a null summary, this field specifies the number of lines in the buffer.) */
+    i32 line_count;
+    
+    /* DOC(If this is not a null summary, this field specifies the file name associated to this buffer.) */
+    char file_name[256];
+    /* DOC(This field specifies the length of the file_name string.) */
+    i32 file_name_len;
+    
+    /* DOC(If this is not a null summary, this field specifies the name of the buffer.) */
+    char buffer_name[256];
+    /* DOC(This field specifies the length of the buffer_name string.) */
+    i32 buffer_name_len;
+    
+    /* DOC(This field indicates the dirty state of the buffer.) */
+    Dirty_State dirty;
+    
+    /* DOC(If this is not a null summary, this field indicates whether the buffer is set to lex tokens.) */
+    b32 is_lexed;
+    /* DOC(If this is not a null summary, this field indicates whether the buffer has up to date tokens available. If this field is false, it may simply mean the tokens are still being generated in a background task and will be available later.  If that is the case, is_lexed will be true to indicate that the buffer is trying to get it's tokens up to date.) */
+    b32 tokens_are_ready;
+    /* DOC(If this is not a null summary, this field specifies the id of the command map for this buffer.) */
+    i32 map_id;
+    /* DOC(If this is not a null summary, this field indicates whether the buffer 'prefers' wrapped lines.) */
+    b32 unwrapped_lines;
+};
+
+#endif
+
+// BOTTOM
+

4coder_base_types.h

@@ -127,16 +127,11 @@ typedef double f64;
 #define min_u32 ((u32)0)
 #define min_u64 ((u64)0)
 
-static f32
+static const f32 max_f32 = 3.4028234e+38f;
-max_f32_proc(void){
+static const f32 min_f32 = 1.1754943e-38f;
-    union{
+
-        u32 x;
+static const f64 max_f64 = 1.7976931348623157e+308;
-        f32 f;
+static const f64 min_f64 = 2.2250738585072014e-308;
-    } c;
-    c.x = 0x7f800000;
-    return(c.f);
-}
-static const f32 max_f32 = max_f32_proc();
 
 ////////////////////////////////
 

4coder_default_hooks.cpp

@@ -315,17 +315,39 @@ GET_VIEW_BUFFER_REGION_SIG(default_view_buffer_region){
     return(sub_region);
 }
 
+struct View_Render_Parameters{
+    View_ID view_id;
+    Range on_screen_range;
+    Rect_i32 buffer_rect;
+};
+
 static void
-default_buffer_render_caller(Application_Links *app, Render_Parameters render_params){
+default_buffer_render_caller(Application_Links *app, Frame_Info frame_info, View_ID view_id, Rect_i32 view_inner_rect){
-    View_Summary view = get_view(app, render_params.view_id, AccessAll);
+    Buffer_ID buffer_id = 0;
+    view_get_buffer(app, view_id, AccessAll, &buffer_id);
+    
+    Rect_i32 sub_region = i32R(0, 0, rect_width(view_inner_rect), rect_height(view_inner_rect));
+    sub_region = default_view_buffer_region(app, view_id, sub_region);
+    Rect_i32 buffer_rect = {};
+    buffer_rect.p0 = view_inner_rect.p0 + sub_region.p0;
+    buffer_rect.p1 = view_inner_rect.p0 + sub_region.p1;
+    buffer_rect.x1 = clamp_top(buffer_rect.x1, view_inner_rect.x1);
+    buffer_rect.y1 = clamp_top(buffer_rect.y1, view_inner_rect.y1);
+    buffer_rect.x0 = clamp_top(buffer_rect.x0, buffer_rect.x1);
+    buffer_rect.y0 = clamp_top(buffer_rect.y0, buffer_rect.y1);
+    
+    Range on_screen_range = {};
+    compute_render_layout(app, view_id, buffer_id, buffer_rect, &on_screen_range);
+    
+    View_Summary view = get_view(app, view_id, AccessAll);
     Buffer_Summary buffer = get_buffer(app, view.buffer_id, AccessAll);
     View_Summary active_view = get_active_view(app, AccessAll);
-    b32 is_active_view = (active_view.view_id == render_params.view_id);
+    b32 is_active_view = (active_view.view_id == view_id);
     
     f32 line_height = view.line_height;
     
     Arena *arena = context_get_arena(app);
-    Temp_Memory_Arena temp = begin_temp_memory(arena);
+    Temp_Memory_Arena major_temp = begin_temp_memory(arena);
     
     static Managed_Scope render_scope = 0;
     if (render_scope == 0){
@@ -338,7 +360,7 @@ default_buffer_render_caller(Application_Links *app, Render_Parameters render_pa
         // NOTE(allen): Filebar
         {
             b32 showing_file_bar = false;
-            if (view_get_setting(app, render_params.view_id, ViewSetting_ShowFileBar, &showing_file_bar)){
+            if (view_get_setting(app, view_id, ViewSetting_ShowFileBar, &showing_file_bar)){
                 if (showing_file_bar){
                     Rect_f32 bar = r_cursor;
                     bar.y1 = bar.y0 + line_height + 2.f;
@@ -410,7 +432,7 @@ default_buffer_render_caller(Application_Links *app, Render_Parameters render_pa
             Query_Bar *space[32];
             Query_Bar_Ptr_Array query_bars = {};
             query_bars.ptrs = space;
-            if (get_active_query_bars(app, render_params.view_id, ArrayCount(space), &query_bars)){
+            if (get_active_query_bars(app, view_id, ArrayCount(space), &query_bars)){
                 for (i32 i = 0; i < query_bars.count; i += 1){
                     Query_Bar *query_bar = query_bars.ptrs[i];
                     
@@ -456,17 +478,17 @@ default_buffer_render_caller(Application_Links *app, Render_Parameters render_pa
             Fancy_Color line_color = fancy_id(Stag_Line_Numbers_Text);
             
             Full_Cursor cursor = {};
-            view_compute_cursor(app, render_params.view_id, seek_pos(render_params.on_screen_range.first), &cursor);
+            view_compute_cursor(app, view_id, seek_pos(on_screen_range.first), &cursor);
-            for (;cursor.pos <= render_params.on_screen_range.one_past_last;){
+            for (;cursor.pos <= on_screen_range.one_past_last;){
                 Vec2 p = panel_space_from_view_space(cursor.wrapped_p, view.scroll_vars.scroll_p);
-                p += V2(render_params.buffer_region.p0);
+                p += V2(buffer_rect.p0);
                 p.x = left_margin.x0;
                 Temp_Memory_Arena temp = begin_temp_memory(arena);
                 Fancy_String *line_string = push_fancy_stringf(arena, line_color, "%*d", line_count_digit_count, cursor.line);
                 draw_fancy_string(app, font_id, line_string, p, Stag_Margin_Active, 0);
                 end_temp_memory(temp);
                 i32 next_line = cursor.line + 1;
-                view_compute_cursor(app, render_params.view_id, seek_line_char(next_line, 1), &cursor);
+                view_compute_cursor(app, view_id, seek_line_char(next_line, 1), &cursor);
                 if (cursor.line < next_line){
                     break;
                 }
@@ -481,16 +503,16 @@ default_buffer_render_caller(Application_Links *app, Render_Parameters render_pa
     // NOTE(allen): Scan for TODOs and NOTEs
     {
         Temp_Memory temp = begin_temp_memory(scratch);
-        i32 text_size = render_params.on_screen_range.one_past_last - render_params.on_screen_range.first;
+        i32 text_size = on_screen_range.one_past_last - on_screen_range.first;
         char *text = push_array(scratch, char, text_size);
-        buffer_read_range(app, &buffer, render_params.on_screen_range.first, render_params.on_screen_range.one_past_last, text);
+        buffer_read_range(app, &buffer, on_screen_range.first, on_screen_range.one_past_last, text);
         
         Highlight_Record *records = push_array(scratch, Highlight_Record, 0);
         String tail = make_string(text, text_size);
         for (i32 i = 0; i < text_size; tail.str += 1, tail.size -= 1, i += 1){
             if (match_part(tail, make_lit_string("NOTE"))){
                 Highlight_Record *record = push_array(scratch, Highlight_Record, 1);
-                record->first = i + render_params.on_screen_range.first;
+                record->first = i + on_screen_range.first;
                 record->one_past_last = record->first + 4;
                 record->color = Stag_Text_Cycle_2;
                 tail.str += 3;
@@ -499,7 +521,7 @@ default_buffer_render_caller(Application_Links *app, Render_Parameters render_pa
             }
             else if (match_part(tail, make_lit_string("TODO"))){
                 Highlight_Record *record = push_array(scratch, Highlight_Record, 1);
-                record->first = i + render_params.on_screen_range.first;
+                record->first = i + on_screen_range.first;
                 record->one_past_last = record->first + 4;
                 record->color = Stag_Text_Cycle_1;
                 tail.str += 3;
@@ -664,7 +686,7 @@ default_buffer_render_caller(Application_Links *app, Render_Parameters render_pa
         mark_enclosures(app, scratch, render_scope, &buffer, pos, FindScope_Paren, VisualType_CharacterBlocks, 0, colors, color_count);
     }
     
-    render_params.do_core_render(app);
+    draw_render_layout(app, view_id);
     
     // NOTE(allen): FPS HUD
     if (show_fps_hud){
@@ -673,10 +695,10 @@ default_buffer_render_caller(Application_Links *app, Render_Parameters render_pa
         static f32 history_animation_dt[history_depth] = {};
         static i32 history_frame_index[history_depth] = {};
         
-        i32 wrapped_index = render_params.frame.index%history_depth;
+        i32 wrapped_index = frame_info.index%history_depth;
-        history_literal_dt[wrapped_index]   = render_params.frame.literal_dt;
+        history_literal_dt[wrapped_index]   = frame_info.literal_dt;
-        history_animation_dt[wrapped_index] = render_params.frame.animation_dt;
+        history_animation_dt[wrapped_index] = frame_info.animation_dt;
-        history_frame_index[wrapped_index]  = render_params.frame.index;
+        history_frame_index[wrapped_index]  = frame_info.index;
         
         Rect_f32 hud_rect = f32R(view.render_region);
         hud_rect.y0 = hud_rect.y1 - view.line_height*(f32)(history_depth);
@@ -730,7 +752,7 @@ default_buffer_render_caller(Application_Links *app, Render_Parameters render_pa
         }
     }
     
-    end_temp_memory(temp);
+    end_temp_memory(major_temp);
     managed_scope_clear_self_all_dependent_scopes(app, render_scope);
 }
 
@@ -756,12 +778,12 @@ get_margin_color(i32 level){
 }
 
 static void
-default_ui_render_caller(Application_Links *app, Render_Parameters render_params){
+default_ui_render_caller(Application_Links *app, View_ID view_id){
     UI_Data *ui_data = 0;
     Arena *ui_arena = 0;
-    if (view_get_ui_data(app, render_params.view_id, ViewGetUIFlag_KeepDataAsIs, &ui_data, &ui_arena)){
+    if (view_get_ui_data(app, view_id, ViewGetUIFlag_KeepDataAsIs, &ui_data, &ui_arena)){
         View_Summary view = {};
-        if (get_view_summary(app, render_params.view_id, AccessAll, &view)){
+        if (get_view_summary(app, view_id, AccessAll, &view)){
             Rect_f32 rect_f32 = f32R(view.render_region);
             GUI_Scroll_Vars ui_scroll = view.scroll_vars;
             
@@ -806,12 +828,33 @@ default_ui_render_caller(Application_Links *app, Render_Parameters render_params
     }
 }
 
-RENDER_CALLER_SIG(default_render_caller){
+static void
-    if (view_is_in_ui_mode(app, render_params.view_id)){
+default_render_view(Application_Links *app, Frame_Info frame_info, View_ID view_id, b32 is_active){
-        default_ui_render_caller(app, render_params);
+    Rect_i32 view_rect = {};
+    view_get_region(app, view_id, &view_rect);
+    Rect_i32 inner = get_inner_rect(view_rect, 3);
+    draw_rectangle(app, f32R(view_rect), get_margin_color(is_active?UIActivation_Active:UIActivation_None));
+    draw_rectangle(app, f32R(inner), Stag_Back);
+    draw_clip_push(app, f32R(inner));
+    draw_coordinate_center_push(app, V2(inner.p0));
+    if (view_is_in_ui_mode(app, view_id)){
+        default_ui_render_caller(app, view_id);
     }
     else{
-        default_buffer_render_caller(app, render_params);
+        default_buffer_render_caller(app, frame_info, view_id, inner);
+    }
+    draw_clip_pop(app);
+    draw_coordinate_center_pop(app);
+}
+
+RENDER_CALLER_SIG(default_render_caller){
+    View_ID active_view_id = 0;
+    get_active_view(app, AccessAll, &active_view_id);
+    View_ID view_id = 0;
+    for (get_view_next(app, 0, AccessAll, &view_id);
+         view_id != 0;
+         get_view_next(app, view_id, AccessAll, &view_id)){
+        default_render_view(app, frame_info, view_id, (active_view_id == view_id));
     }
 }
 

4coder_default_include.cpp

@@ -24,6 +24,7 @@
 #include "4coder_lib/4coder_utf8.h"
 #include "4coder_lib/4cpp_lexer.h"
 
+#include "4coder_api_transition_30_31.h"
 
 #include "4coder_helper.h"
 #include "4coder_fancy.h"

4coder_generated/app_functions.h

@@ -14,7 +14,6 @@ struct Application_Links;
 #define GET_BUFFER_COUNT_SIG(n) i32 n(Application_Links *app)
 #define GET_BUFFER_FIRST_SIG(n) b32 n(Application_Links *app, Access_Flag access, Buffer_ID *buffer_id_out)
 #define GET_BUFFER_NEXT_SIG(n) b32 n(Application_Links *app, Buffer_ID buffer_id, Access_Flag access, Buffer_ID *buffer_id_out)
-#define GET_BUFFER_SUMMARY_SIG(n) b32 n(Application_Links *app, Buffer_ID buffer_id, Access_Flag access, Buffer_Summary *buffer_summary_out)
 #define GET_BUFFER_BY_NAME_SIG(n) b32 n(Application_Links *app, String name, Access_Flag access, Buffer_ID *buffer_id_out)
 #define GET_BUFFER_BY_FILE_NAME_SIG(n) b32 n(Application_Links *app, String file_name, Access_Flag access, Buffer_ID *buffer_id_out)
 #define BUFFER_READ_RANGE_SIG(n) b32 n(Application_Links *app, Buffer_ID buffer_id, i32 start, i32 one_past_last, char *out)
@@ -45,12 +44,12 @@ struct Application_Links;
 #define BUFFER_KILL_SIG(n) b32 n(Application_Links *app, Buffer_ID buffer_id, Buffer_Kill_Flag flags, Buffer_Kill_Result *result)
 #define BUFFER_REOPEN_SIG(n) b32 n(Application_Links *app, Buffer_ID buffer_id, Buffer_Reopen_Flag flags, Buffer_Reopen_Result *result)
 #define BUFFER_GET_FILE_ATTRIBUTES_SIG(n) b32 n(Application_Links *app, Buffer_ID buffer_id, File_Attributes *attributes_out)
-#define GET_VIEW_FIRST_SIG(n) b32 n(Application_Links *app, Access_Flag access, View_ID *view_id_out)
 #define GET_VIEW_NEXT_SIG(n) b32 n(Application_Links *app, View_ID view_id, Access_Flag access, View_ID *view_id_out)
 #define GET_VIEW_PREV_SIG(n) b32 n(Application_Links *app, View_ID view_id, Access_Flag access, View_ID *view_id_out)
 #define GET_VIEW_SUMMARY_SIG(n) b32 n(Application_Links *app, View_ID view_id, Access_Flag access, View_Summary *view_summary_out)
 #define GET_ACTIVE_VIEW_SIG(n) b32 n(Application_Links *app, Access_Flag access, View_ID *view_id_out)
 #define GET_ACTIVE_PANEL_SIG(n) b32 n(Application_Links *app, Panel_ID *panel_id_out)
+#define VIEW_GET_BUFFER_SIG(n) b32 n(Application_Links *app, View_ID view_id, Access_Flag access, Buffer_ID *buffer_id_out)
 #define VIEW_GET_PANEL_SIG(n) b32 n(Application_Links *app, View_ID view_id, Panel_ID *panel_id_out)
 #define PANEL_GET_VIEW_SIG(n) b32 n(Application_Links *app, Panel_ID panel_id, View_ID *view_id_out)
 #define PANEL_IS_SPLIT_SIG(n) b32 n(Application_Links *app, Panel_ID panel_id)
@@ -63,6 +62,7 @@ struct Application_Links;
 #define PANEL_GET_MAX_SIG(n) b32 n(Application_Links *app, Panel_ID panel_id, Panel_ID *panel_id_out)
 #define PANEL_GET_MARGIN_SIG(n) b32 n(Application_Links *app, Panel_ID panel_id, i32_Rect *margins_out)
 #define VIEW_CLOSE_SIG(n) b32 n(Application_Links *app, View_ID view_id)
+#define VIEW_GET_REGION_SIG(n) b32 n(Application_Links *app, View_ID view_id, Rect_i32 *region_out)
 #define VIEW_GET_BUFFER_REGION_SIG(n) b32 n(Application_Links *app, View_ID view_id, Rect_i32 *region_out)
 #define VIEW_SET_ACTIVE_SIG(n) b32 n(Application_Links *app, View_ID view_id)
 #define VIEW_GET_SETTING_SIG(n) b32 n(Application_Links *app, View_ID view_id, View_Setting_ID setting, i32 *value_out)
@@ -158,11 +158,15 @@ struct Application_Links;
 #define GET_MICROSECONDS_TIMESTAMP_SIG(n) Microsecond_Time_Stamp n(Application_Links *app)
 #define DRAW_STRING_SIG(n) Vec2 n(Application_Links *app, Face_ID font_id, String str, Vec2 point, int_color color, u32 flags, Vec2 delta)
 #define GET_STRING_ADVANCE_SIG(n) f32 n(Application_Links *app, Face_ID font_id, String str)
-#define DRAW_RECTANGLE_SIG(n) void n(Application_Links *app, f32_Rect rect, int_color color)
+#define DRAW_RECTANGLE_SIG(n) void n(Application_Links *app, Rect_f32 rect, int_color color)
 #define DRAW_RECTANGLE_OUTLINE_SIG(n) void n(Application_Links *app, f32_Rect rect, int_color color)
 #define DRAW_CLIP_PUSH_SIG(n) void n(Application_Links *app, f32_Rect clip_box)
 #define DRAW_CLIP_POP_SIG(n) f32_Rect n(Application_Links *app)
+#define DRAW_COORDINATE_CENTER_PUSH_SIG(n) void n(Application_Links *app, Vec2 point)
+#define DRAW_COORDINATE_CENTER_POP_SIG(n) Vec2 n(Application_Links *app)
 #define GET_DEFAULT_FONT_FOR_VIEW_SIG(n) Face_ID n(Application_Links *app, View_ID view_id)
+#define COMPUTE_RENDER_LAYOUT_SIG(n) b32 n(Application_Links *app, View_ID view_id, Buffer_ID buffer_id, Rect_i32 rect, Range *on_screen_range_out)
+#define DRAW_RENDER_LAYOUT_SIG(n) void n(Application_Links *app, View_ID view_id)
 #define OPEN_COLOR_PICKER_SIG(n) void n(Application_Links *app, color_picker *picker)
 #define ANIMATE_IN_N_MILLISECONDS_SIG(n) void n(Application_Links *app, u32 n)
 #define FIND_ALL_IN_RANGE_INSENSITIVE_SIG(n) Found_String_List n(Application_Links *app, Buffer_ID buffer_id, i32 start, i32 end, String key, Partition *memory)
@@ -182,7 +186,6 @@ typedef CREATE_PARSE_CONTEXT_SIG(Create_Parse_Context_Function);
 typedef GET_BUFFER_COUNT_SIG(Get_Buffer_Count_Function);
 typedef GET_BUFFER_FIRST_SIG(Get_Buffer_First_Function);
 typedef GET_BUFFER_NEXT_SIG(Get_Buffer_Next_Function);
-typedef GET_BUFFER_SUMMARY_SIG(Get_Buffer_Summary_Function);
 typedef GET_BUFFER_BY_NAME_SIG(Get_Buffer_By_Name_Function);
 typedef GET_BUFFER_BY_FILE_NAME_SIG(Get_Buffer_By_File_Name_Function);
 typedef BUFFER_READ_RANGE_SIG(Buffer_Read_Range_Function);
@@ -213,12 +216,12 @@ typedef BUFFER_SAVE_SIG(Buffer_Save_Function);
 typedef BUFFER_KILL_SIG(Buffer_Kill_Function);
 typedef BUFFER_REOPEN_SIG(Buffer_Reopen_Function);
 typedef BUFFER_GET_FILE_ATTRIBUTES_SIG(Buffer_Get_File_Attributes_Function);
-typedef GET_VIEW_FIRST_SIG(Get_View_First_Function);
 typedef GET_VIEW_NEXT_SIG(Get_View_Next_Function);
 typedef GET_VIEW_PREV_SIG(Get_View_Prev_Function);
 typedef GET_VIEW_SUMMARY_SIG(Get_View_Summary_Function);
 typedef GET_ACTIVE_VIEW_SIG(Get_Active_View_Function);
 typedef GET_ACTIVE_PANEL_SIG(Get_Active_Panel_Function);
+typedef VIEW_GET_BUFFER_SIG(View_Get_Buffer_Function);
 typedef VIEW_GET_PANEL_SIG(View_Get_Panel_Function);
 typedef PANEL_GET_VIEW_SIG(Panel_Get_View_Function);
 typedef PANEL_IS_SPLIT_SIG(Panel_Is_Split_Function);
@@ -231,6 +234,7 @@ typedef PANEL_GET_CHILD_SIG(Panel_Get_Child_Function);
 typedef PANEL_GET_MAX_SIG(Panel_Get_Max_Function);
 typedef PANEL_GET_MARGIN_SIG(Panel_Get_Margin_Function);
 typedef VIEW_CLOSE_SIG(View_Close_Function);
+typedef VIEW_GET_REGION_SIG(View_Get_Region_Function);
 typedef VIEW_GET_BUFFER_REGION_SIG(View_Get_Buffer_Region_Function);
 typedef VIEW_SET_ACTIVE_SIG(View_Set_Active_Function);
 typedef VIEW_GET_SETTING_SIG(View_Get_Setting_Function);
@@ -330,7 +334,11 @@ typedef DRAW_RECTANGLE_SIG(Draw_Rectangle_Function);
 typedef DRAW_RECTANGLE_OUTLINE_SIG(Draw_Rectangle_Outline_Function);
 typedef DRAW_CLIP_PUSH_SIG(Draw_Clip_Push_Function);
 typedef DRAW_CLIP_POP_SIG(Draw_Clip_Pop_Function);
+typedef DRAW_COORDINATE_CENTER_PUSH_SIG(Draw_Coordinate_Center_Push_Function);
+typedef DRAW_COORDINATE_CENTER_POP_SIG(Draw_Coordinate_Center_Pop_Function);
 typedef GET_DEFAULT_FONT_FOR_VIEW_SIG(Get_Default_Font_For_View_Function);
+typedef COMPUTE_RENDER_LAYOUT_SIG(Compute_Render_Layout_Function);
+typedef DRAW_RENDER_LAYOUT_SIG(Draw_Render_Layout_Function);
 typedef OPEN_COLOR_PICKER_SIG(Open_Color_Picker_Function);
 typedef ANIMATE_IN_N_MILLISECONDS_SIG(Animate_In_N_Milliseconds_Function);
 typedef FIND_ALL_IN_RANGE_INSENSITIVE_SIG(Find_All_In_Range_Insensitive_Function);
@@ -352,7 +360,6 @@ Create_Parse_Context_Function *create_parse_context;
 Get_Buffer_Count_Function *get_buffer_count;
 Get_Buffer_First_Function *get_buffer_first;
 Get_Buffer_Next_Function *get_buffer_next;
-Get_Buffer_Summary_Function *get_buffer_summary;
 Get_Buffer_By_Name_Function *get_buffer_by_name;
 Get_Buffer_By_File_Name_Function *get_buffer_by_file_name;
 Buffer_Read_Range_Function *buffer_read_range;
@@ -383,12 +390,12 @@ Buffer_Save_Function *buffer_save;
 Buffer_Kill_Function *buffer_kill;
 Buffer_Reopen_Function *buffer_reopen;
 Buffer_Get_File_Attributes_Function *buffer_get_file_attributes;
-Get_View_First_Function *get_view_first;
 Get_View_Next_Function *get_view_next;
 Get_View_Prev_Function *get_view_prev;
 Get_View_Summary_Function *get_view_summary;
 Get_Active_View_Function *get_active_view;
 Get_Active_Panel_Function *get_active_panel;
+View_Get_Buffer_Function *view_get_buffer;
 View_Get_Panel_Function *view_get_panel;
 Panel_Get_View_Function *panel_get_view;
 Panel_Is_Split_Function *panel_is_split;
@@ -401,6 +408,7 @@ Panel_Get_Child_Function *panel_get_child;
 Panel_Get_Max_Function *panel_get_max;
 Panel_Get_Margin_Function *panel_get_margin;
 View_Close_Function *view_close;
+View_Get_Region_Function *view_get_region;
 View_Get_Buffer_Region_Function *view_get_buffer_region;
 View_Set_Active_Function *view_set_active;
 View_Get_Setting_Function *view_get_setting;
@@ -500,7 +508,11 @@ Draw_Rectangle_Function *draw_rectangle;
 Draw_Rectangle_Outline_Function *draw_rectangle_outline;
 Draw_Clip_Push_Function *draw_clip_push;
 Draw_Clip_Pop_Function *draw_clip_pop;
+Draw_Coordinate_Center_Push_Function *draw_coordinate_center_push;
+Draw_Coordinate_Center_Pop_Function *draw_coordinate_center_pop;
 Get_Default_Font_For_View_Function *get_default_font_for_view;
+Compute_Render_Layout_Function *compute_render_layout;
+Draw_Render_Layout_Function *draw_render_layout;
 Open_Color_Picker_Function *open_color_picker;
 Animate_In_N_Milliseconds_Function *animate_in_n_milliseconds;
 Find_All_In_Range_Insensitive_Function *find_all_in_range_insensitive;
@@ -521,7 +533,6 @@ Create_Parse_Context_Function *create_parse_context_;
 Get_Buffer_Count_Function *get_buffer_count_;
 Get_Buffer_First_Function *get_buffer_first_;
 Get_Buffer_Next_Function *get_buffer_next_;
-Get_Buffer_Summary_Function *get_buffer_summary_;
 Get_Buffer_By_Name_Function *get_buffer_by_name_;
 Get_Buffer_By_File_Name_Function *get_buffer_by_file_name_;
 Buffer_Read_Range_Function *buffer_read_range_;
@@ -552,12 +563,12 @@ Buffer_Save_Function *buffer_save_;
 Buffer_Kill_Function *buffer_kill_;
 Buffer_Reopen_Function *buffer_reopen_;
 Buffer_Get_File_Attributes_Function *buffer_get_file_attributes_;
-Get_View_First_Function *get_view_first_;
 Get_View_Next_Function *get_view_next_;
 Get_View_Prev_Function *get_view_prev_;
 Get_View_Summary_Function *get_view_summary_;
 Get_Active_View_Function *get_active_view_;
 Get_Active_Panel_Function *get_active_panel_;
+View_Get_Buffer_Function *view_get_buffer_;
 View_Get_Panel_Function *view_get_panel_;
 Panel_Get_View_Function *panel_get_view_;
 Panel_Is_Split_Function *panel_is_split_;
@@ -570,6 +581,7 @@ Panel_Get_Child_Function *panel_get_child_;
 Panel_Get_Max_Function *panel_get_max_;
 Panel_Get_Margin_Function *panel_get_margin_;
 View_Close_Function *view_close_;
+View_Get_Region_Function *view_get_region_;
 View_Get_Buffer_Region_Function *view_get_buffer_region_;
 View_Set_Active_Function *view_set_active_;
 View_Get_Setting_Function *view_get_setting_;
@@ -669,7 +681,11 @@ Draw_Rectangle_Function *draw_rectangle_;
 Draw_Rectangle_Outline_Function *draw_rectangle_outline_;
 Draw_Clip_Push_Function *draw_clip_push_;
 Draw_Clip_Pop_Function *draw_clip_pop_;
+Draw_Coordinate_Center_Push_Function *draw_coordinate_center_push_;
+Draw_Coordinate_Center_Pop_Function *draw_coordinate_center_pop_;
 Get_Default_Font_For_View_Function *get_default_font_for_view_;
+Compute_Render_Layout_Function *compute_render_layout_;
+Draw_Render_Layout_Function *draw_render_layout_;
 Open_Color_Picker_Function *open_color_picker_;
 Animate_In_N_Milliseconds_Function *animate_in_n_milliseconds_;
 Find_All_In_Range_Insensitive_Function *find_all_in_range_insensitive_;
@@ -698,7 +714,6 @@ app_links->create_parse_context_ = Create_Parse_Context;\
 app_links->get_buffer_count_ = Get_Buffer_Count;\
 app_links->get_buffer_first_ = Get_Buffer_First;\
 app_links->get_buffer_next_ = Get_Buffer_Next;\
-app_links->get_buffer_summary_ = Get_Buffer_Summary;\
 app_links->get_buffer_by_name_ = Get_Buffer_By_Name;\
 app_links->get_buffer_by_file_name_ = Get_Buffer_By_File_Name;\
 app_links->buffer_read_range_ = Buffer_Read_Range;\
@@ -729,12 +744,12 @@ app_links->buffer_save_ = Buffer_Save;\
 app_links->buffer_kill_ = Buffer_Kill;\
 app_links->buffer_reopen_ = Buffer_Reopen;\
 app_links->buffer_get_file_attributes_ = Buffer_Get_File_Attributes;\
-app_links->get_view_first_ = Get_View_First;\
 app_links->get_view_next_ = Get_View_Next;\
 app_links->get_view_prev_ = Get_View_Prev;\
 app_links->get_view_summary_ = Get_View_Summary;\
 app_links->get_active_view_ = Get_Active_View;\
 app_links->get_active_panel_ = Get_Active_Panel;\
+app_links->view_get_buffer_ = View_Get_Buffer;\
 app_links->view_get_panel_ = View_Get_Panel;\
 app_links->panel_get_view_ = Panel_Get_View;\
 app_links->panel_is_split_ = Panel_Is_Split;\
@@ -747,6 +762,7 @@ app_links->panel_get_child_ = Panel_Get_Child;\
 app_links->panel_get_max_ = Panel_Get_Max;\
 app_links->panel_get_margin_ = Panel_Get_Margin;\
 app_links->view_close_ = View_Close;\
+app_links->view_get_region_ = View_Get_Region;\
 app_links->view_get_buffer_region_ = View_Get_Buffer_Region;\
 app_links->view_set_active_ = View_Set_Active;\
 app_links->view_get_setting_ = View_Get_Setting;\
@@ -846,7 +862,11 @@ app_links->draw_rectangle_ = Draw_Rectangle;\
 app_links->draw_rectangle_outline_ = Draw_Rectangle_Outline;\
 app_links->draw_clip_push_ = Draw_Clip_Push;\
 app_links->draw_clip_pop_ = Draw_Clip_Pop;\
+app_links->draw_coordinate_center_push_ = Draw_Coordinate_Center_Push;\
+app_links->draw_coordinate_center_pop_ = Draw_Coordinate_Center_Pop;\
 app_links->get_default_font_for_view_ = Get_Default_Font_For_View;\
+app_links->compute_render_layout_ = Compute_Render_Layout;\
+app_links->draw_render_layout_ = Draw_Render_Layout;\
 app_links->open_color_picker_ = Open_Color_Picker;\
 app_links->animate_in_n_milliseconds_ = Animate_In_N_Milliseconds;\
 app_links->find_all_in_range_insensitive_ = Find_All_In_Range_Insensitive;\
@@ -867,7 +887,6 @@ static Parse_Context_ID create_parse_context(Application_Links *app, Parser_Stri
 static i32 get_buffer_count(Application_Links *app){return(app->get_buffer_count(app));}
 static b32 get_buffer_first(Application_Links *app, Access_Flag access, Buffer_ID *buffer_id_out){return(app->get_buffer_first(app, access, buffer_id_out));}
 static b32 get_buffer_next(Application_Links *app, Buffer_ID buffer_id, Access_Flag access, Buffer_ID *buffer_id_out){return(app->get_buffer_next(app, buffer_id, access, buffer_id_out));}
-static b32 get_buffer_summary(Application_Links *app, Buffer_ID buffer_id, Access_Flag access, Buffer_Summary *buffer_summary_out){return(app->get_buffer_summary(app, buffer_id, access, buffer_summary_out));}
 static b32 get_buffer_by_name(Application_Links *app, String name, Access_Flag access, Buffer_ID *buffer_id_out){return(app->get_buffer_by_name(app, name, access, buffer_id_out));}
 static b32 get_buffer_by_file_name(Application_Links *app, String file_name, Access_Flag access, Buffer_ID *buffer_id_out){return(app->get_buffer_by_file_name(app, file_name, access, buffer_id_out));}
 static b32 buffer_read_range(Application_Links *app, Buffer_ID buffer_id, i32 start, i32 one_past_last, char *out){return(app->buffer_read_range(app, buffer_id, start, one_past_last, out));}
@@ -898,12 +917,12 @@ static b32 buffer_save(Application_Links *app, Buffer_ID buffer_id, String file_
 static b32 buffer_kill(Application_Links *app, Buffer_ID buffer_id, Buffer_Kill_Flag flags, Buffer_Kill_Result *result){return(app->buffer_kill(app, buffer_id, flags, result));}
 static b32 buffer_reopen(Application_Links *app, Buffer_ID buffer_id, Buffer_Reopen_Flag flags, Buffer_Reopen_Result *result){return(app->buffer_reopen(app, buffer_id, flags, result));}
 static b32 buffer_get_file_attributes(Application_Links *app, Buffer_ID buffer_id, File_Attributes *attributes_out){return(app->buffer_get_file_attributes(app, buffer_id, attributes_out));}
-static b32 get_view_first(Application_Links *app, Access_Flag access, View_ID *view_id_out){return(app->get_view_first(app, access, view_id_out));}
 static b32 get_view_next(Application_Links *app, View_ID view_id, Access_Flag access, View_ID *view_id_out){return(app->get_view_next(app, view_id, access, view_id_out));}
 static b32 get_view_prev(Application_Links *app, View_ID view_id, Access_Flag access, View_ID *view_id_out){return(app->get_view_prev(app, view_id, access, view_id_out));}
 static b32 get_view_summary(Application_Links *app, View_ID view_id, Access_Flag access, View_Summary *view_summary_out){return(app->get_view_summary(app, view_id, access, view_summary_out));}
 static b32 get_active_view(Application_Links *app, Access_Flag access, View_ID *view_id_out){return(app->get_active_view(app, access, view_id_out));}
 static b32 get_active_panel(Application_Links *app, Panel_ID *panel_id_out){return(app->get_active_panel(app, panel_id_out));}
+static b32 view_get_buffer(Application_Links *app, View_ID view_id, Access_Flag access, Buffer_ID *buffer_id_out){return(app->view_get_buffer(app, view_id, access, buffer_id_out));}
 static b32 view_get_panel(Application_Links *app, View_ID view_id, Panel_ID *panel_id_out){return(app->view_get_panel(app, view_id, panel_id_out));}
 static b32 panel_get_view(Application_Links *app, Panel_ID panel_id, View_ID *view_id_out){return(app->panel_get_view(app, panel_id, view_id_out));}
 static b32 panel_is_split(Application_Links *app, Panel_ID panel_id){return(app->panel_is_split(app, panel_id));}
@@ -916,6 +935,7 @@ static b32 panel_get_child(Application_Links *app, Panel_ID panel_id, Panel_Chil
 static b32 panel_get_max(Application_Links *app, Panel_ID panel_id, Panel_ID *panel_id_out){return(app->panel_get_max(app, panel_id, panel_id_out));}
 static b32 panel_get_margin(Application_Links *app, Panel_ID panel_id, i32_Rect *margins_out){return(app->panel_get_margin(app, panel_id, margins_out));}
 static b32 view_close(Application_Links *app, View_ID view_id){return(app->view_close(app, view_id));}
+static b32 view_get_region(Application_Links *app, View_ID view_id, Rect_i32 *region_out){return(app->view_get_region(app, view_id, region_out));}
 static b32 view_get_buffer_region(Application_Links *app, View_ID view_id, Rect_i32 *region_out){return(app->view_get_buffer_region(app, view_id, region_out));}
 static b32 view_set_active(Application_Links *app, View_ID view_id){return(app->view_set_active(app, view_id));}
 static b32 view_get_setting(Application_Links *app, View_ID view_id, View_Setting_ID setting, i32 *value_out){return(app->view_get_setting(app, view_id, setting, value_out));}
@@ -1011,11 +1031,15 @@ static b32 set_window_title(Application_Links *app, String title){return(app->se
 static Microsecond_Time_Stamp get_microseconds_timestamp(Application_Links *app){return(app->get_microseconds_timestamp(app));}
 static Vec2 draw_string(Application_Links *app, Face_ID font_id, String str, Vec2 point, int_color color, u32 flags, Vec2 delta){return(app->draw_string(app, font_id, str, point, color, flags, delta));}
 static f32 get_string_advance(Application_Links *app, Face_ID font_id, String str){return(app->get_string_advance(app, font_id, str));}
-static void draw_rectangle(Application_Links *app, f32_Rect rect, int_color color){(app->draw_rectangle(app, rect, color));}
+static void draw_rectangle(Application_Links *app, Rect_f32 rect, int_color color){(app->draw_rectangle(app, rect, color));}
 static void draw_rectangle_outline(Application_Links *app, f32_Rect rect, int_color color){(app->draw_rectangle_outline(app, rect, color));}
 static void draw_clip_push(Application_Links *app, f32_Rect clip_box){(app->draw_clip_push(app, clip_box));}
 static f32_Rect draw_clip_pop(Application_Links *app){return(app->draw_clip_pop(app));}
+static void draw_coordinate_center_push(Application_Links *app, Vec2 point){(app->draw_coordinate_center_push(app, point));}
+static Vec2 draw_coordinate_center_pop(Application_Links *app){return(app->draw_coordinate_center_pop(app));}
 static Face_ID get_default_font_for_view(Application_Links *app, View_ID view_id){return(app->get_default_font_for_view(app, view_id));}
+static b32 compute_render_layout(Application_Links *app, View_ID view_id, Buffer_ID buffer_id, Rect_i32 rect, Range *on_screen_range_out){return(app->compute_render_layout(app, view_id, buffer_id, rect, on_screen_range_out));}
+static void draw_render_layout(Application_Links *app, View_ID view_id){(app->draw_render_layout(app, view_id));}
 static void open_color_picker(Application_Links *app, color_picker *picker){(app->open_color_picker(app, picker));}
 static void animate_in_n_milliseconds(Application_Links *app, u32 n){(app->animate_in_n_milliseconds(app, n));}
 static Found_String_List find_all_in_range_insensitive(Application_Links *app, Buffer_ID buffer_id, i32 start, i32 end, String key, Partition *memory){return(app->find_all_in_range_insensitive(app, buffer_id, start, end, key, memory));}
@@ -1036,7 +1060,6 @@ static Parse_Context_ID create_parse_context(Application_Links *app, Parser_Stri
 static i32 get_buffer_count(Application_Links *app){return(app->get_buffer_count_(app));}
 static b32 get_buffer_first(Application_Links *app, Access_Flag access, Buffer_ID *buffer_id_out){return(app->get_buffer_first_(app, access, buffer_id_out));}
 static b32 get_buffer_next(Application_Links *app, Buffer_ID buffer_id, Access_Flag access, Buffer_ID *buffer_id_out){return(app->get_buffer_next_(app, buffer_id, access, buffer_id_out));}
-static b32 get_buffer_summary(Application_Links *app, Buffer_ID buffer_id, Access_Flag access, Buffer_Summary *buffer_summary_out){return(app->get_buffer_summary_(app, buffer_id, access, buffer_summary_out));}
 static b32 get_buffer_by_name(Application_Links *app, String name, Access_Flag access, Buffer_ID *buffer_id_out){return(app->get_buffer_by_name_(app, name, access, buffer_id_out));}
 static b32 get_buffer_by_file_name(Application_Links *app, String file_name, Access_Flag access, Buffer_ID *buffer_id_out){return(app->get_buffer_by_file_name_(app, file_name, access, buffer_id_out));}
 static b32 buffer_read_range(Application_Links *app, Buffer_ID buffer_id, i32 start, i32 one_past_last, char *out){return(app->buffer_read_range_(app, buffer_id, start, one_past_last, out));}
@@ -1067,12 +1090,12 @@ static b32 buffer_save(Application_Links *app, Buffer_ID buffer_id, String file_
 static b32 buffer_kill(Application_Links *app, Buffer_ID buffer_id, Buffer_Kill_Flag flags, Buffer_Kill_Result *result){return(app->buffer_kill_(app, buffer_id, flags, result));}
 static b32 buffer_reopen(Application_Links *app, Buffer_ID buffer_id, Buffer_Reopen_Flag flags, Buffer_Reopen_Result *result){return(app->buffer_reopen_(app, buffer_id, flags, result));}
 static b32 buffer_get_file_attributes(Application_Links *app, Buffer_ID buffer_id, File_Attributes *attributes_out){return(app->buffer_get_file_attributes_(app, buffer_id, attributes_out));}
-static b32 get_view_first(Application_Links *app, Access_Flag access, View_ID *view_id_out){return(app->get_view_first_(app, access, view_id_out));}
 static b32 get_view_next(Application_Links *app, View_ID view_id, Access_Flag access, View_ID *view_id_out){return(app->get_view_next_(app, view_id, access, view_id_out));}
 static b32 get_view_prev(Application_Links *app, View_ID view_id, Access_Flag access, View_ID *view_id_out){return(app->get_view_prev_(app, view_id, access, view_id_out));}
 static b32 get_view_summary(Application_Links *app, View_ID view_id, Access_Flag access, View_Summary *view_summary_out){return(app->get_view_summary_(app, view_id, access, view_summary_out));}
 static b32 get_active_view(Application_Links *app, Access_Flag access, View_ID *view_id_out){return(app->get_active_view_(app, access, view_id_out));}
 static b32 get_active_panel(Application_Links *app, Panel_ID *panel_id_out){return(app->get_active_panel_(app, panel_id_out));}
+static b32 view_get_buffer(Application_Links *app, View_ID view_id, Access_Flag access, Buffer_ID *buffer_id_out){return(app->view_get_buffer_(app, view_id, access, buffer_id_out));}
 static b32 view_get_panel(Application_Links *app, View_ID view_id, Panel_ID *panel_id_out){return(app->view_get_panel_(app, view_id, panel_id_out));}
 static b32 panel_get_view(Application_Links *app, Panel_ID panel_id, View_ID *view_id_out){return(app->panel_get_view_(app, panel_id, view_id_out));}
 static b32 panel_is_split(Application_Links *app, Panel_ID panel_id){return(app->panel_is_split_(app, panel_id));}
@@ -1085,6 +1108,7 @@ static b32 panel_get_child(Application_Links *app, Panel_ID panel_id, Panel_Chil
 static b32 panel_get_max(Application_Links *app, Panel_ID panel_id, Panel_ID *panel_id_out){return(app->panel_get_max_(app, panel_id, panel_id_out));}
 static b32 panel_get_margin(Application_Links *app, Panel_ID panel_id, i32_Rect *margins_out){return(app->panel_get_margin_(app, panel_id, margins_out));}
 static b32 view_close(Application_Links *app, View_ID view_id){return(app->view_close_(app, view_id));}
+static b32 view_get_region(Application_Links *app, View_ID view_id, Rect_i32 *region_out){return(app->view_get_region_(app, view_id, region_out));}
 static b32 view_get_buffer_region(Application_Links *app, View_ID view_id, Rect_i32 *region_out){return(app->view_get_buffer_region_(app, view_id, region_out));}
 static b32 view_set_active(Application_Links *app, View_ID view_id){return(app->view_set_active_(app, view_id));}
 static b32 view_get_setting(Application_Links *app, View_ID view_id, View_Setting_ID setting, i32 *value_out){return(app->view_get_setting_(app, view_id, setting, value_out));}
@@ -1180,11 +1204,15 @@ static b32 set_window_title(Application_Links *app, String title){return(app->se
 static Microsecond_Time_Stamp get_microseconds_timestamp(Application_Links *app){return(app->get_microseconds_timestamp_(app));}
 static Vec2 draw_string(Application_Links *app, Face_ID font_id, String str, Vec2 point, int_color color, u32 flags, Vec2 delta){return(app->draw_string_(app, font_id, str, point, color, flags, delta));}
 static f32 get_string_advance(Application_Links *app, Face_ID font_id, String str){return(app->get_string_advance_(app, font_id, str));}
-static void draw_rectangle(Application_Links *app, f32_Rect rect, int_color color){(app->draw_rectangle_(app, rect, color));}
+static void draw_rectangle(Application_Links *app, Rect_f32 rect, int_color color){(app->draw_rectangle_(app, rect, color));}
 static void draw_rectangle_outline(Application_Links *app, f32_Rect rect, int_color color){(app->draw_rectangle_outline_(app, rect, color));}
 static void draw_clip_push(Application_Links *app, f32_Rect clip_box){(app->draw_clip_push_(app, clip_box));}
 static f32_Rect draw_clip_pop(Application_Links *app){return(app->draw_clip_pop_(app));}
+static void draw_coordinate_center_push(Application_Links *app, Vec2 point){(app->draw_coordinate_center_push_(app, point));}
+static Vec2 draw_coordinate_center_pop(Application_Links *app){return(app->draw_coordinate_center_pop_(app));}
 static Face_ID get_default_font_for_view(Application_Links *app, View_ID view_id){return(app->get_default_font_for_view_(app, view_id));}
+static b32 compute_render_layout(Application_Links *app, View_ID view_id, Buffer_ID buffer_id, Rect_i32 rect, Range *on_screen_range_out){return(app->compute_render_layout_(app, view_id, buffer_id, rect, on_screen_range_out));}
+static void draw_render_layout(Application_Links *app, View_ID view_id){(app->draw_render_layout_(app, view_id));}
 static void open_color_picker(Application_Links *app, color_picker *picker){(app->open_color_picker_(app, picker));}
 static void animate_in_n_milliseconds(Application_Links *app, u32 n){(app->animate_in_n_milliseconds_(app, n));}
 static Found_String_List find_all_in_range_insensitive(Application_Links *app, Buffer_ID buffer_id, i32 start, i32 end, String key, Partition *memory){return(app->find_all_in_range_insensitive_(app, buffer_id, start, end, key, memory));}

4coder_helper.cpp

@@ -631,7 +631,7 @@ get_view_last(Application_Links *app, Access_Flag access, View_ID *view_id_out){
 static View_ID
 get_next_view_looped_all_panels(Application_Links *app, View_ID view_id, Access_Flag access){
     if (!get_view_next(app, view_id, access, &view_id)){
-        if (!get_view_first(app, access, &view_id)){
+        if (!get_view_next(app, 0, access, &view_id)){
             view_id = 0;
         }
     }

4ed.cpp

@@ -1453,13 +1453,14 @@ App_Step_Sig(app_step){
             animation_dt = literal_dt;
         }
         
+        Frame_Info frame = {};
+        frame.index = models->frame_counter;
+        frame.literal_dt = literal_dt;
+        frame.animation_dt = animation_dt;
+        
         {
             Color_Table color_table = models->fallback_color_table;
             if (models->modify_color_table != 0){
-                Frame_Info frame = {};
-                frame.index = models->frame_counter;
-                frame.literal_dt = literal_dt;
-                frame.animation_dt = animation_dt;
                 color_table = models->modify_color_table(&models->app_links, frame);
                 if (color_table.count < models->fallback_color_table.count){
                     block_copy(models->fallback_color_table.vals, color_table.vals, color_table.count*sizeof(*color_table.vals));
@@ -1470,7 +1471,13 @@ App_Step_Sig(app_step){
         }
         
         begin_render_section(target, system, models->frame_counter, literal_dt, animation_dt);
+        models->in_render_mode = true;
         
+        if (models->render_caller != 0){
+            models->render_caller(&models->app_links, frame);
+        }
+        
+#if 0        
         Panel *active_panel = layout_get_active_panel(layout);
         View *active_view = active_panel->view;
         
@@ -1510,7 +1517,9 @@ App_Step_Sig(app_step){
             draw_rectangle(target, i32R( full.x0, inner.y0, inner.x0, inner.y1), margin_color);
             draw_rectangle(target, i32R(inner.x1, inner.y0,  full.x1, inner.y1), margin_color);
         }
+#endif
         
+        models->in_render_mode = false;
         end_render_section(target, system);
     }
     

4ed_api_implementation.cpp

@@ -16,35 +16,6 @@ access_test(u32 lock_flags, u32 access_flags){
     return((lock_flags & ~access_flags) == 0);
 }
 
-internal void
-fill_buffer_summary(Buffer_Summary *buffer, Editing_File *file, Working_Set *working_set){
-    block_zero_struct(buffer);
-    if (!file->is_dummy){
-        buffer->exists = 1;
-        buffer->ready = file_is_ready(file);
-        
-        buffer->buffer_id = file->id.id;
-        buffer->size = buffer_size(&file->state.buffer);
-        buffer->line_count = file->state.buffer.line_count;
-        
-        buffer->file_name_len = file->canon.name.size;
-        buffer->file_name = file->canon.name.str;
-        
-        buffer->buffer_name_len = file->unique_name.name.size;
-        buffer->buffer_name = file->unique_name.name.str;
-        
-        buffer->dirty = file->state.dirty;
-        
-        buffer->is_lexed = file->settings.tokens_exist;
-        
-        buffer->tokens_are_ready = file_tokens_are_ready(file);
-        buffer->map_id = file->settings.base_map_id;
-        buffer->unwrapped_lines = file->settings.unwrapped_lines;
-        
-        buffer->lock_flags = file_get_access_flags(file);
-    }
-}
-
 internal void
 fill_view_summary(System_Functions *system, View_Summary *view, View *vptr, Live_Views *live_set, Working_Set *working_set){
     block_zero_struct(view);
@@ -691,12 +662,16 @@ DOC_SEE(get_buffer_first)
         *buffer_id_out = file->id.id;
         result = true;
     }
+    else{
+        *buffer_id_out = 0;
+    }
     return(result);
 }
 
+#if 0
 // TODO(allen): redocument
 API_EXPORT b32
-Get_Buffer_Summary(Application_Links *app, Buffer_ID buffer_id, Access_Flag access, Buffer_Summary *buffer_summary_out)
+//Get_Buffer_Summary(Application_Links *app, Buffer_ID buffer_id, Access_Flag access, Buffer_Summary *buffer_summary_out)
 /*
 DOC_PARAM(buffer_id, The parameter buffer_id specifies which buffer to try to get.)
 DOC_PARAM(access, The access parameter determines what levels of protection this call can access.)
@@ -715,6 +690,7 @@ DOC_SEE(Buffer_ID)
     }
     return(result);
 }
+#endif
 
 // TODO(allen): redocument
 API_EXPORT b32
@@ -1872,36 +1848,6 @@ get_view_prev__inner(Layout *layout, View *view){
     return(view);
 }
 
-// TODO(allen): replace this with get_view_next(app, 0, access, view_id_out);
-// TODO(allen): redocument
-API_EXPORT b32
-Get_View_First(Application_Links *app, Access_Flag access, View_ID *view_id_out)
-/*
-DOC_PARAM(access, The access parameter determines what levels of protection this call can access.)
-DOC_RETURN(This call returns the summary of the first view in a view loop.)
-DOC(
-This call begins a loop across all the open views.
-
-If the View_Summary returned is a null summary, the loop is finished.
-Views should not be closed or opened durring a view loop.
-)
-DOC_SEE(Access_Flag)
-DOC_SEE(get_view_next)
-*/{
-    Models *models = (Models*)app->cmd_context;
-    Layout *layout = &models->layout;
-    View *view = get_view_next__inner(layout, 0);
-    for (;view != 0 && !access_test(view_get_access_flags(view), access);){
-        view = get_view_next__inner(layout, view);
-    }
-    b32 result = false;
-    if (view != 0){
-        *view_id_out = view_get_id(&models->live_set, view);
-        result = true;
-    }
-    return(result);
-}
-
 // TODO(allen): redocument
 API_EXPORT b32
 Get_View_Next(Application_Links *app, View_ID view_id, Access_Flag access, View_ID *view_id_out)
@@ -1930,6 +1876,9 @@ DOC_SEE(get_view_first)
         *view_id_out = view_get_id(&models->live_set, view);
         result = true;
     }
+    else{
+        *view_id_out = 0;
+    }
     return(result);
 }
 
@@ -2009,6 +1958,21 @@ Get_Active_Panel(Application_Links *app, Panel_ID *panel_id_out){
     return(result);
 }
 
+API_EXPORT b32
+View_Get_Buffer(Application_Links *app, View_ID view_id, Access_Flag access, Buffer_ID *buffer_id_out){
+    Models *models = (Models*)app->cmd_context;
+    View *view = imp_get_view(models, view_id);
+    b32 result = false;
+    if (view_api_check_view(view)){
+        Editing_File *file = view->file;
+        if (buffer_api_check_file(file, access)){
+            *buffer_id_out = file->id.id;
+            result = true;
+        }
+    }
+    return(result);
+}
+
 API_EXPORT b32
 View_Get_Panel(Application_Links *app, View_ID view_id, Panel_ID *panel_id_out){
     Models *models = (Models*)app->cmd_context;
@@ -2238,13 +2202,25 @@ in the system, the call will fail.)
     return(result);
 }
 
+API_EXPORT b32
+View_Get_Region(Application_Links *app, View_ID view_id, Rect_i32 *region_out){
+    Models *models = (Models*)app->cmd_context;
+    View *view = imp_get_view(models, view_id);
+    b32 result = false;
+    if (view_api_check_view(view)){
+        *region_out = view->panel->rect_full;
+        result = true;
+    }
+    return(result);
+}
+
 API_EXPORT b32
 View_Get_Buffer_Region(Application_Links *app, View_ID view_id, Rect_i32 *region_out){
     Models *models = (Models*)app->cmd_context;
     View *view = imp_get_view(models, view_id);
     b32 result = false;
     if (view_api_check_view(view)){
-        *region_out = view_get_file_region(models, view);
+        *region_out = view_get_buffer_rect(models, view);
         result = true;
     }
     return(result);
@@ -4454,16 +4430,39 @@ DOC(Returns a microsecond resolution timestamp.)
 }
 
 internal Vec2
-draw_helper__view_space_to_screen_space(Models *models, Vec2 point){
+models_get_coordinate_center(Models *models){
-    i32_Rect region = models->render_view_rect;
+    Vec2 result = {};
+    if (models->coordinate_center_stack_top > 0){
+        result = models->coordinate_center_stack[models->coordinate_center_stack_top - 1];
+    }
+    return(result);
+}
+
+internal Vec2
+draw_helper__models_space_to_screen_space(Models *models, Vec2 point){
+    Vec2 c = models_get_coordinate_center(models);
+    return(point + c);
+}
+
+internal f32_Rect
+draw_helper__models_space_to_screen_space(Models *models, f32_Rect rect){
+    Vec2 c = models_get_coordinate_center(models);
+    rect.p0 += c;
+    rect.p1 += c;
+    return(rect);
+}
+
+internal Vec2
+draw_helper__view_space_to_screen_space(View *view, Vec2 point){
+    i32_Rect region = view->render.view_rect;
     point.x += (f32)region.x0;
     point.y += (f32)region.y0;
     return(point);
 }
 
 internal f32_Rect
-draw_helper__view_space_to_screen_space(Models *models, f32_Rect rect){
+draw_helper__view_space_to_screen_space(View *view, f32_Rect rect){
-    i32_Rect region = models->render_view_rect;
+    i32_Rect region = view->render.view_rect;
     f32 x_corner = (f32)region.x0;
     f32 y_corner = (f32)region.y0;
     rect.x0 += x_corner;
@@ -4474,16 +4473,16 @@ draw_helper__view_space_to_screen_space(Models *models, f32_Rect rect){
 }
 
 internal Vec2
-draw_helper__screen_space_to_view_space(Models *models, Vec2 point){
+draw_helper__screen_space_to_view_space(View *view, Vec2 point){
-    i32_Rect region = models->render_view_rect;
+    i32_Rect region = view->render.view_rect;
     point.x -= (f32)region.x0;
     point.y -= (f32)region.y0;
     return(point);
 }
 
 internal f32_Rect
-draw_helper__screen_space_to_view_space(Models *models, f32_Rect rect){
+draw_helper__screen_space_to_view_space(View *view, f32_Rect rect){
-    i32_Rect region = models->render_view_rect;
+    i32_Rect region = view->render.view_rect;
     f32 x_corner = (f32)region.x0;
     f32 y_corner = (f32)region.y0;
     rect.x0 -= x_corner;
@@ -4502,13 +4501,13 @@ Draw_String(Application_Links *app, Face_ID font_id, String str, Vec2 point, int
 {
     Vec2 result = point;
     Models *models = (Models*)app->cmd_context;
-    if (models->render_view == 0){
+    if (models->target == 0){
         f32 width = font_string_width(models->system, models->target, font_id, str);
         result += delta*width;
     }
     else{
         Color_Table color_table = models->color_table;
-        point = draw_helper__view_space_to_screen_space(models, point);
+        point = draw_helper__models_space_to_screen_space(models, point);
         u32 actual_color = finalize_color(color_table, color);
         f32 width = draw_string(models->system, models->target, font_id, str, point, actual_color, flags, delta);
         result += delta*width;
@@ -4524,11 +4523,11 @@ Get_String_Advance(Application_Links *app, Face_ID font_id, String str)
 }
 
 API_EXPORT void
-Draw_Rectangle(Application_Links *app, f32_Rect rect, int_color color){
+Draw_Rectangle(Application_Links *app, Rect_f32 rect, int_color color){
     Models *models = (Models*)app->cmd_context;
-    if (models->render_view != 0){
+    if (models->in_render_mode){
         Color_Table color_table = models->color_table;
-        rect = draw_helper__view_space_to_screen_space(models, rect);
+        rect = draw_helper__models_space_to_screen_space(models, rect);
         u32 actual_color = finalize_color(color_table, color);
         draw_rectangle(models->target, rect, actual_color);
     }
@@ -4538,13 +4537,9 @@ API_EXPORT void
 Draw_Rectangle_Outline(Application_Links *app, f32_Rect rect, int_color color)
 {
     Models *models = (Models*)app->cmd_context;
-    if (models->render_view != 0){
+    if (models->in_render_mode){
         Color_Table color_table = models->color_table;
-        //Style *style = &models->styles.styles[0];
+        rect = draw_helper__models_space_to_screen_space(models, rect);
-        //Theme *theme_data = &style->theme;
-        
-        rect = draw_helper__view_space_to_screen_space(models, rect);
-        
         u32 actual_color = finalize_color(color_table, color);
         draw_rectangle_outline(models->target, rect, actual_color);
     }
@@ -4553,7 +4548,7 @@ Draw_Rectangle_Outline(Application_Links *app, f32_Rect rect, int_color color)
 API_EXPORT void
 Draw_Clip_Push(Application_Links *app, f32_Rect clip_box){
     Models *models = (Models*)app->cmd_context;
-    clip_box = draw_helper__view_space_to_screen_space(models, clip_box);
+    clip_box = draw_helper__models_space_to_screen_space(models, clip_box);
     render_push_clip(models->target, i32R(clip_box));
 }
 
@@ -4561,7 +4556,27 @@ API_EXPORT f32_Rect
 Draw_Clip_Pop(Application_Links *app){
     Models *models = (Models*)app->cmd_context;
     f32_Rect result = f32R(render_pop_clip(models->target));
-    result = draw_helper__screen_space_to_view_space(models, result);
+    return(result);
+}
+
+API_EXPORT void
+Draw_Coordinate_Center_Push(Application_Links *app, Vec2 point){
+    Models *models = (Models*)app->cmd_context;
+    if (models->coordinate_center_stack_top < ArrayCount(models->coordinate_center_stack)){
+        point = draw_helper__models_space_to_screen_space(models, point);
+        models->coordinate_center_stack[models->coordinate_center_stack_top] = point;
+        models->coordinate_center_stack_top += 1;
+    }
+}
+
+API_EXPORT Vec2
+Draw_Coordinate_Center_Pop(Application_Links *app){
+    Models *models = (Models*)app->cmd_context;
+    Vec2 result = {};
+    if (models->coordinate_center_stack_top > 0){
+        models->coordinate_center_stack_top -= 1;
+        result = models->coordinate_center_stack[models->coordinate_center_stack_top];
+    }
     return(result);
 }
 
@@ -4576,11 +4591,142 @@ Get_Default_Font_For_View(Application_Links *app, View_ID view_id)
     return(face_id);
 }
 
+API_EXPORT b32
+Compute_Render_Layout(Application_Links *app, View_ID view_id, Buffer_ID buffer_id, Rect_i32 rect, Range *on_screen_range_out){
+    Models *models = (Models*)app->cmd_context;
+    System_Functions *system = models->system;
+    View *view = imp_get_view(models, view_id);
+    Editing_File *file = imp_get_file(models, buffer_id);
+    b32 result = false;
+    if (view_api_check_view(view) && buffer_api_check_file(file)){
+        i32 line_height = view->line_height;
+        f32 max_x = (f32)file->settings.display_width;
+        i32 max_y = rect.y1 - rect.y0 + line_height;
+        
+        f32 left_side_space = 0;
+        
+        // TODO(allen): Don't force me to over-allocate!  Write a looser buffer render thingy,
+        // or just stop doing that nonsense all together.
+        f32 screen_width  = (f32)rect_width(rect);
+        f32 screen_height = (f32)rect_height(rect);
+        f32 smallest_char_width  = 6.f;
+        f32 smallest_char_height = 8.f;
+        i32 max = (i32)(screen_width*screen_height/(smallest_char_width*smallest_char_height))*2;
+        if (view->layout_arena.app == 0){
+            view->layout_arena = make_arena(app);
+        }
+        else{
+            arena_release_all(&view->layout_arena);
+        }
+        Buffer_Render_Item *items = push_array(&view->layout_arena, Buffer_Render_Item, max);
+        
+        b32 wrapped = !file->settings.unwrapped_lines;
+        Face_ID font_id = file->settings.font_id;
+        Font_Pointers font = system->font.get_pointers_by_id(font_id);
+        
+        File_Edit_Positions edit_pos = view_get_edit_pos(view);
+        f32 scroll_x = edit_pos.scroll.scroll_x;
+        f32 scroll_y = edit_pos.scroll.scroll_y;
+        
+        Full_Cursor render_cursor = view_get_render_cursor(system, view);
+        
+        i32 item_count = 0;
+        i32 end_pos = 0;
+        {
+            Buffer_Render_Params params;
+            params.buffer        = &file->state.buffer;
+            params.items         = items;
+            params.max           = max;
+            params.count         = &item_count;
+            params.port_x        = (f32)rect.x0 + left_side_space;
+            params.port_y        = (f32)rect.y0;
+            params.clip_w        = view_width(models, view) - left_side_space;
+            params.scroll_x      = scroll_x;
+            params.scroll_y      = scroll_y;
+            params.width         = max_x;
+            params.height        = (f32)max_y;
+            params.start_cursor  = render_cursor;
+            params.wrapped       = wrapped;
+            params.system        = system;
+            params.font          = font;
+            params.virtual_white = file->settings.virtual_white;
+            params.wrap_slashes  = file->settings.wrap_indicator;
+            
+            Buffer_Render_State state = {};
+            Buffer_Layout_Stop stop = {};
+            
+            f32 line_shift = 0.f;
+            b32 do_wrap = false;
+            i32 wrap_unit_end = 0;
+            
+            b32 first_wrap_determination = true;
+            i32 wrap_array_index = 0;
+            
+            do{
+                stop = buffer_render_data(&state, params, line_shift, do_wrap, wrap_unit_end);
+                switch (stop.status){
+                    case BLStatus_NeedWrapDetermination:
+                    {
+                        if (first_wrap_determination){
+                            wrap_array_index = binary_search(file->state.wrap_positions, stop.pos, 0, file->state.wrap_position_count);
+                            ++wrap_array_index;
+                            if (file->state.wrap_positions[wrap_array_index] == stop.pos){
+                                do_wrap = true;
+                                wrap_unit_end = file->state.wrap_positions[wrap_array_index];
+                            }
+                            else{
+                                do_wrap = false;
+                                wrap_unit_end = file->state.wrap_positions[wrap_array_index];
+                            }
+                            first_wrap_determination = false;
+                        }
+                        else{
+                            Assert(stop.pos == wrap_unit_end);
+                            do_wrap = true;
+                            ++wrap_array_index;
+                            wrap_unit_end = file->state.wrap_positions[wrap_array_index];
+                        }
+                    }break;
+                    
+                    case BLStatus_NeedWrapLineShift:
+                    case BLStatus_NeedLineShift:
+                    {
+                        line_shift = file->state.line_indents[stop.wrap_line_index];
+                    }break;
+                }
+            }while(stop.status != BLStatus_Finished);
+            
+            end_pos = state.i;
+        }
+        
+        Range range = {render_cursor.pos, end_pos};
+        
+        view->render.view_rect = view->panel->rect_inner;
+        view->render.buffer_rect = rect;
+        view->render.cursor = render_cursor;
+        view->render.range = range;
+        view->render.items = items;
+        view->render.item_count = item_count;
+        
+        *on_screen_range_out = range;
+    }
+    return(result);
+}
+
+API_EXPORT void
+Draw_Render_Layout(Application_Links *app, View_ID view_id){
+    Models *models = (Models*)app->cmd_context;
+    View *view = imp_get_view(models, view_id);
+    if (view_api_check_view(view) && models->target != 0){
+        render_loaded_file_in_view__inner(models, models->target, view, view->render.buffer_rect,
+                                          view->render.cursor, view->render.range,
+                                          view->render.items, view->render.item_count);
+        arena_release_all(&view->layout_arena);
+    }
+}
+
 API_EXPORT void
 Open_Color_Picker(Application_Links *app, color_picker *picker)
-/*
-DOC(Opens a color picker using the parameters in the supplied structure.)
-*/
 {
     Models *models = (Models*)app->cmd_context;
     System_Functions *system = models->system;

4ed_app_models.h

@@ -117,8 +117,13 @@ struct Models{
     Application_Step_Input *input;
     Key_Event_Data key;
     
-    // Render Context
     Render_Target *target;
+    b32 in_render_mode;
+    // TODO(allen): endless stack?
+    Vec2 coordinate_center_stack[32];
+    i32 coordinate_center_stack_top;
+    
+#if 0
     View *render_view;
     i32_Rect render_view_rect;
     i32_Rect render_buffer_rect;
@@ -126,6 +131,7 @@ struct Models{
     Range render_range;
     Buffer_Render_Item *render_items;
     i32 render_item_count;
+#endif
 };
 
 ////////////////////////////////

4ed_buffer.h

@@ -167,8 +167,10 @@ struct Buffer_Render_Item{
     i32 index;
     u32 codepoint;
     u32 flags;
-    f32 x0, y0;
+    f32 x0;
-    f32 x1, y1;
+    f32 y0;
+    f32 x1;
+    f32 y1;
 };
 
 struct Render_Item_Write{

4ed_view.cpp

@@ -87,7 +87,7 @@ view_set_edit_pos(View *view, File_Edit_Positions edit_pos){
 ////////////////////////////////
 
 internal Rect_i32
-view_get_file_region(Models *models, View *view){
+view_get_buffer_rect(Models *models, View *view){
     Rect_i32 region = {};
     if (models->get_view_buffer_region != 0){
         Rect_i32 rect = view->panel->rect_inner;
@@ -108,12 +108,12 @@ view_get_file_region(Models *models, View *view){
 
 internal i32
 view_width(Models *models, View *view){
-    return(rect_width(view_get_file_region(models, view)));
+    return(rect_width(view_get_buffer_rect(models, view)));
 }
 
 internal i32
 view_height(Models *models, View *view){
-    return(rect_height(view_get_file_region(models, view)));
+    return(rect_height(view_get_buffer_rect(models, view)));
 }
 
 internal Vec2_i32
@@ -1195,6 +1195,7 @@ render_loaded_file_in_view__inner(Models *models, Render_Target *target, View *v
     }
 }
 
+#if 0
 internal void
 dont_do_core_render(Application_Links *app){}
 
@@ -1212,6 +1213,7 @@ do_core_render(Application_Links *app){
     render_loaded_file_in_view__inner(models, target, view, rect, render_cursor, on_screen_range, items, item_count);
     draw_pop_clip(target);
 }
+#endif
 
 internal Full_Cursor
 view_get_render_cursor(System_Functions *system, View *view, f32 scroll_y){
@@ -1242,6 +1244,7 @@ view_get_render_cursor_target(System_Functions *system, View *view){
     return(view_get_render_cursor(system, view, scroll_y));
 }
 
+#if 0
 internal void
 view_call_render_caller(Models *models, Render_Target *target, View *view,
                         i32_Rect rect, Full_Cursor render_cursor, Range on_screen_range, Buffer_Render_Item *items, i32 item_count, Render_Callback *core_render){
@@ -1255,136 +1258,22 @@ view_call_render_caller(Models *models, Render_Target *target, View *view,
         models->render_items = items;
         models->render_item_count = item_count;
         
+        Frame_Info frame = {};
+        frame.index = target->frame_index;
+        frame.literal_dt = target->literal_dt;
+        frame.animation_dt = target->animation_dt;
+#if 0
         Render_Parameters params = {};
         params.view_id = view_id;
         params.on_screen_range = on_screen_range;
-        params.frame.index = target->frame_index;
-        params.frame.literal_dt = target->literal_dt;
-        params.frame.animation_dt = target->animation_dt;
         params.buffer_region = rect;
         params.do_core_render = core_render;
-        models->render_caller(&models->app_links, params);
+#endif
+        models->render_caller(&models->app_links, frame);
         models->render_view = 0;
     }
 }
-
+#endif
-internal void
-render_loaded_file_in_view(System_Functions *system, View *view, Models *models, i32_Rect rect, b32 is_active, Render_Target *target){
-    Editing_File *file = view->file;
-    i32 line_height = view->line_height;
-    
-    f32 max_x = (f32)file->settings.display_width;
-    i32 max_y = rect.y1 - rect.y0 + line_height;
-    
-    Assert(file != 0);
-    Assert(!file->is_dummy);
-    Assert(buffer_good(&file->state.buffer));
-    
-    Partition *part = &models->mem.part;
-    Temp_Memory temp = begin_temp_memory(part);
-    
-    push_align(part, 4);
-    
-    f32 left_side_space = 0;
-    
-    i32 max = part_remaining(part)/sizeof(Buffer_Render_Item);
-    Buffer_Render_Item *items = push_array(part, Buffer_Render_Item, 0);
-    
-    b32 wrapped = !file->settings.unwrapped_lines;
-    Face_ID font_id = file->settings.font_id;
-    Font_Pointers font = system->font.get_pointers_by_id(font_id);
-    
-    File_Edit_Positions edit_pos = view_get_edit_pos(view);
-    f32 scroll_x = edit_pos.scroll.scroll_x;
-    f32 scroll_y = edit_pos.scroll.scroll_y;
-    
-    Full_Cursor render_cursor = view_get_render_cursor(system, view);
-    
-    i32 item_count = 0;
-    i32 end_pos = 0;
-    {
-        Buffer_Render_Params params;
-        params.buffer        = &file->state.buffer;
-        params.items         = items;
-        params.max           = max;
-        params.count         = &item_count;
-        params.port_x        = (f32)rect.x0 + left_side_space;
-        params.port_y        = (f32)rect.y0;
-        params.clip_w        = view_width(models, view) - left_side_space;
-        params.scroll_x      = scroll_x;
-        params.scroll_y      = scroll_y;
-        params.width         = max_x;
-        params.height        = (f32)max_y;
-        params.start_cursor  = render_cursor;
-        params.wrapped       = wrapped;
-        params.system        = system;
-        params.font          = font;
-        params.virtual_white = file->settings.virtual_white;
-        params.wrap_slashes  = file->settings.wrap_indicator;
-        
-        Buffer_Render_State state = {};
-        Buffer_Layout_Stop stop = {};
-        
-        f32 line_shift = 0.f;
-        b32 do_wrap = false;
-        i32 wrap_unit_end = 0;
-        
-        b32 first_wrap_determination = true;
-        i32 wrap_array_index = 0;
-        
-        do{
-            stop = buffer_render_data(&state, params, line_shift, do_wrap, wrap_unit_end);
-            switch (stop.status){
-                case BLStatus_NeedWrapDetermination:
-                {
-                    if (first_wrap_determination){
-                        wrap_array_index = binary_search(file->state.wrap_positions, stop.pos, 0, file->state.wrap_position_count);
-                        ++wrap_array_index;
-                        if (file->state.wrap_positions[wrap_array_index] == stop.pos){
-                            do_wrap = true;
-                            wrap_unit_end = file->state.wrap_positions[wrap_array_index];
-                        }
-                        else{
-                            do_wrap = false;
-                            wrap_unit_end = file->state.wrap_positions[wrap_array_index];
-                        }
-                        first_wrap_determination = false;
-                    }
-                    else{
-                        Assert(stop.pos == wrap_unit_end);
-                        do_wrap = true;
-                        ++wrap_array_index;
-                        wrap_unit_end = file->state.wrap_positions[wrap_array_index];
-                    }
-                }break;
-                
-                case BLStatus_NeedWrapLineShift:
-                case BLStatus_NeedLineShift:
-                {
-                    line_shift = file->state.line_indents[stop.wrap_line_index];
-                }break;
-            }
-        }while(stop.status != BLStatus_Finished);
-        
-        end_pos = state.i;
-    }
-    push_array(part, Buffer_Render_Item, item_count);
-    
-    Range on_screen_range = {};
-    on_screen_range.first = render_cursor.pos;
-    on_screen_range.one_past_last = end_pos;
-    
-    ////////////////////////////////
-    
-    if (models->render_caller != 0){
-        view_call_render_caller(models, target, view, rect, render_cursor, on_screen_range, items, item_count, do_core_render);
-    }
-    else{
-        render_loaded_file_in_view__inner(models, target, view, rect, render_cursor, on_screen_range, items, item_count);
-    }
-    
-    end_temp_memory(temp);
-}
 
 // BOTTOM
 

4ed_view.h

@@ -46,6 +46,19 @@ struct View{
     i32 line_height;
     
     Query_Set query_set;
+    
+    // Render Context
+    Arena layout_arena;
+    
+    struct{    
+        i32_Rect view_rect;
+        i32_Rect buffer_rect;
+        Full_Cursor cursor;
+        Range range;
+        Buffer_Render_Item *items;
+        i32 item_count;
+    } render;
+    
 #if 0
     f32 widget_height;
 #endif

4ed_view_ui.cpp

@@ -38,6 +38,7 @@ do_step_file_view(System_Functions *system, Models *models, View *view, i32_Rect
 
 ////////////////////////////////
 
+#if 0
 internal void
 do_render_file_view(System_Functions *system, View *view, Models *models, GUI_Scroll_Vars *scroll, View *active, i32_Rect rect, b32 is_active, Render_Target *target){
     Editing_File *file = view->file;
@@ -45,17 +46,135 @@ do_render_file_view(System_Functions *system, View *view, Models *models, GUI_Sc
     draw_push_clip(target, rect);
     if (!view->ui_mode){
         if (file_is_ready(file)){
-            Rect_i32 file_region = view_get_file_region(models, view);
+            Rect_i32 buffer_rect = view_get_buffer_rect(models, view);
-            render_loaded_file_in_view(system, view, models, file_region, is_active, target);
+            //render_loaded_file_in_view(system, view, models, buffer_rect, is_active, target);
+            
+            Editing_File *file = view->file;
+            i32 line_height = view->line_height;
+            
+            f32 max_x = (f32)file->settings.display_width;
+            i32 max_y = buffer_rect.y1 - buffer_rect.y0 + line_height;
+            
+            Assert(file != 0);
+            Assert(!file->is_dummy);
+            Assert(buffer_good(&file->state.buffer));
+            
+            Partition *part = &models->mem.part;
+            Temp_Memory temp = begin_temp_memory(part);
+            
+            push_align(part, 4);
+            
+            f32 left_side_space = 0;
+            
+            i32 max = part_remaining(part)/sizeof(Buffer_Render_Item);
+            Buffer_Render_Item *items = push_array(part, Buffer_Render_Item, 0);
+            
+            b32 wrapped = !file->settings.unwrapped_lines;
+            Face_ID font_id = file->settings.font_id;
+            Font_Pointers font = system->font.get_pointers_by_id(font_id);
+            
+            File_Edit_Positions edit_pos = view_get_edit_pos(view);
+            f32 scroll_x = edit_pos.scroll.scroll_x;
+            f32 scroll_y = edit_pos.scroll.scroll_y;
+            
+            Full_Cursor render_cursor = view_get_render_cursor(system, view);
+            
+            i32 item_count = 0;
+            i32 end_pos = 0;
+            {
+                Buffer_Render_Params params;
+                params.buffer        = &file->state.buffer;
+                params.items         = items;
+                params.max           = max;
+                params.count         = &item_count;
+                params.port_x        = (f32)buffer_rect.x0 + left_side_space;
+                params.port_y        = (f32)buffer_rect.y0;
+                params.clip_w        = view_width(models, view) - left_side_space;
+                params.scroll_x      = scroll_x;
+                params.scroll_y      = scroll_y;
+                params.width         = max_x;
+                params.height        = (f32)max_y;
+                params.start_cursor  = render_cursor;
+                params.wrapped       = wrapped;
+                params.system        = system;
+                params.font          = font;
+                params.virtual_white = file->settings.virtual_white;
+                params.wrap_slashes  = file->settings.wrap_indicator;
+                
+                Buffer_Render_State state = {};
+                Buffer_Layout_Stop stop = {};
+                
+                f32 line_shift = 0.f;
+                b32 do_wrap = false;
+                i32 wrap_unit_end = 0;
+                
+                b32 first_wrap_determination = true;
+                i32 wrap_array_index = 0;
+                
+                do{
+                    stop = buffer_render_data(&state, params, line_shift, do_wrap, wrap_unit_end);
+                    switch (stop.status){
+                        case BLStatus_NeedWrapDetermination:
+                        {
+                            if (first_wrap_determination){
+                                wrap_array_index = binary_search(file->state.wrap_positions, stop.pos, 0, file->state.wrap_position_count);
+                                ++wrap_array_index;
+                                if (file->state.wrap_positions[wrap_array_index] == stop.pos){
+                                    do_wrap = true;
+                                    wrap_unit_end = file->state.wrap_positions[wrap_array_index];
+                                }
+                                else{
+                                    do_wrap = false;
+                                    wrap_unit_end = file->state.wrap_positions[wrap_array_index];
+                                }
+                                first_wrap_determination = false;
+                            }
+                            else{
+                                Assert(stop.pos == wrap_unit_end);
+                                do_wrap = true;
+                                ++wrap_array_index;
+                                wrap_unit_end = file->state.wrap_positions[wrap_array_index];
+                            }
+                        }break;
+                        
+                        case BLStatus_NeedWrapLineShift:
+                        case BLStatus_NeedLineShift:
+                        {
+                            line_shift = file->state.line_indents[stop.wrap_line_index];
+                        }break;
+                    }
+                }while(stop.status != BLStatus_Finished);
+                
+                end_pos = state.i;
+            }
+            push_array(part, Buffer_Render_Item, item_count);
+            
+            Range on_screen_range = {};
+            on_screen_range.first = render_cursor.pos;
+            on_screen_range.one_past_last = end_pos;
+            
+            ////////////////////////////////
+            
+            if (models->render_caller != 0){
+                view_call_render_caller(models, target, view, buffer_rect, render_cursor, on_screen_range, items, item_count, do_core_render);
+            }
+            else{
+                render_loaded_file_in_view__inner(models, target, view, buffer_rect, render_cursor, on_screen_range, items, item_count);
+            }
+            
+            end_temp_memory(temp);
         }
     }
     else{
         Full_Cursor render_cursor = {};
         Range on_screen_range = {};
-        view_call_render_caller(models, target, view, rect, render_cursor, on_screen_range, 0, 0, dont_do_core_render);
+        if (models->render_caller != 0){
+            view_call_render_caller(models, target, view, buffer_rect, render_cursor, on_screen_range, 0, 0, dont_do_core_render);
+        }
     }
     draw_pop_clip(target);
 }
+#endif
 
 // BOTTOM