Arbitrary text rotation in immediate mode text draw

Author: Allen Webster

4ed_render_target.cpp

@@ -163,7 +163,7 @@ draw_rectangle(Render_Target *target, Rect_f32 rect, f32 roundness, u32 color){
 
 internal void
 draw_font_glyph(Render_Target *target, Face *face, u32 codepoint, Vec2_f32 p,
-                ARGB_Color color, u32 flags){
+                ARGB_Color color, Glyph_Flag flags, Vec2_f32 x_axis){
     draw__set_face_id(target, face->id);
 
     u16 glyph_index = 0;
@@ -174,9 +174,37 @@ draw_font_glyph(Render_Target *target, Face *face, u32 codepoint, Vec2_f32 p,
     Glyph_Bounds bounds = face->bounds[glyph_index];
     Vec3_f32 texture_dim = face->texture_dim;
 
+    Render_Vertex vertices[6] = {};
+    
     Rect_f32 uv = bounds.uv;
+    vertices[0].uvw = V3f32(uv.x0, uv.y0, bounds.w);
+    vertices[1].uvw = V3f32(uv.x1, uv.y0, bounds.w);
+    vertices[2].uvw = V3f32(uv.x0, uv.y1, bounds.w);
+    vertices[5].uvw = V3f32(uv.x1, uv.y1, bounds.w);
 
-    Render_Vertex vertices[6] = {};
+    Vec2_f32 y_axis = V2f32(-x_axis.y, x_axis.x);
+    Vec2_f32 x_min = bounds.xy_off.x0*x_axis;
+    Vec2_f32 x_max = bounds.xy_off.x1*x_axis;
+    Vec2_f32 y_min = bounds.xy_off.y0*y_axis;
+    Vec2_f32 y_max = bounds.xy_off.y1*y_axis;
+    Vec2_f32 p_x_min = p + x_min;
+    Vec2_f32 p_x_max = p + x_max;
+    vertices[0].xy = p_x_min + y_min;
+    vertices[1].xy = p_x_max + y_min;
+    vertices[2].xy = p_x_min + y_max;
+    vertices[5].xy = p_x_max + y_max;
+    
+#if 0    
+    Vec2_f32 xy_min = p + bounds.xy_off.x0*x_axis + bounds.xy_off.y0*y_axis;
+    Vec2_f32 xy_max = p + bounds.xy_off.x1*x_axis + bounds.xy_off.y1*y_axis;
+    
+    vertices[0].xy = V2f32(xy_min.x, xy_min.y);
+    vertices[1].xy = V2f32(xy_max.x, xy_min.y);
+    vertices[2].xy = V2f32(xy_min.x, xy_max.y);
+    vertices[5].xy = V2f32(xy_max.x, xy_max.y);
+#endif
+    
+#if 0    
     if (!HasFlag(flags, GlyphFlag_Rotate90)){
         Rect_f32 xy = Rf32(p + bounds.xy_off.p0, p + bounds.xy_off.p1);
 
@@ -202,6 +230,7 @@ draw_font_glyph(Render_Target *target, Face *face, u32 codepoint, Vec2_f32 p,
         vertices[5].xy  = V2f32(xy.x1, xy.y0);
         vertices[5].uvw = V3f32(uv.x0, uv.y0, bounds.w);
     }
+#endif
 
     vertices[3] = vertices[1];
     vertices[4] = vertices[2];
@@ -252,7 +281,7 @@ draw_string(Render_Target *target, Face *face, String_Const_u8 string, Vec2_f32
                         if (draw_codepoint == '\t'){
                             draw_codepoint = ' ';
                         }
-                        draw_font_glyph(target, face, draw_codepoint, point, color, flags);
+                        draw_font_glyph(target, face, draw_codepoint, point, color, flags, delta);
                     }
                     local_const f32 internal_tab_width = 4.f;
                     f32 d = font_get_glyph_advance(&face->advance_map, &face->metrics, codepoint, internal_tab_width);
@@ -279,7 +308,7 @@ draw_string(Render_Target *target, Face *face, String_Const_u8 string, Vec2_f32
 
                         Vec2_f32 pp = point;
                         for (u32 j = 0; j < 3; ++j){
-                            draw_font_glyph(target, face, cs[j], pp, color, flags);
+                            draw_font_glyph(target, face, cs[j], pp, color, flags, delta);
                             pp += delta*byte_sub_advances[j];
                         }
                     }

4ed_text_layout.cpp

@@ -92,6 +92,8 @@ text_layout_render(Thread_Context *tctx, Models *models, Text_Layout *layout,
         Face *face = file_get_face(models, file);
         f32 width = rect_width(layout->rect);
 
+        Vec2_f32 delta = V2f32(1.f, 0.f);
+        
         Vec2_f32 shift_p = layout->rect.p0 - layout->point.pixel_shift;
         i64 first_index = layout->visible_range.first;
         i64 line_number = layout->visible_line_number_range.min;
@@ -120,7 +122,7 @@ text_layout_render(Thread_Context *tctx, Models *models, Text_Layout *layout,
                             color = item_colors[item->index - first_index];
                         }
                         Vec2_f32 p = item->rect.p0 + shift_p;
-                        draw_font_glyph(target, face, item->codepoint, p, color, GlyphFlag_None);
+                        draw_font_glyph(target, face, item->codepoint, p, color, GlyphFlag_None, delta);
                     }
                 }
             }

custom/4coder_default_hooks.cpp

@@ -483,8 +483,17 @@ default_whole_screen_render_caller(Application_Links *app, Frame_Info frame_info
     Face_ID face_id = get_face_id(app, 0);
     Scratch_Block scratch(app);
     draw_string_oriented(app, face_id, finalize_color(defcolor_text_default, 0),
-                         SCu8("Hello, World!"), center,
-                         GlyphFlag_Rotate90, V2f32(0.f, 1.f));
+                         SCu8("Hello, World!"), center - V2f32(200.f, 300.f),
+                         0, V2f32(0.f, -1.f));
+    draw_string_oriented(app, face_id, finalize_color(defcolor_text_default, 0),
+                         SCu8("Hello, World!"), center - V2f32(240.f, 300.f),
+                         0, V2f32(0.f, 1.f));
+    draw_string_oriented(app, face_id, finalize_color(defcolor_text_default, 0),
+                         SCu8("Hello, World!"), center - V2f32(400.f, 400.f),
+                         0, V2f32(-1.f, 0.f));
+    draw_string_oriented(app, face_id, finalize_color(defcolor_text_default, 0),
+                         SCu8("Hello, World!"), center - V2f32(400.f, -100.f),
+                         0, V2f32(cos_f32(pi_f32*.333f), sin_f32(pi_f32*.333f)));
 #endif
 }
 

custom/4coder_search.cpp

@@ -301,37 +301,66 @@ word_complete_list_extend_from_raw(Application_Links *app, Arena *arena, String_
     }
 }
 
+function void
+word_complete_iter_init__inner(Buffer_ID buffer, String_Const_u8 needle, Range_i64 range, Word_Complete_Iterator *iter){
+    Application_Links *app = iter->app;
+    Arena *arena = iter->arena;
+    
+    Base_Allocator *allocator = get_base_allocator_system();
+    if (iter->already_used_table.allocator != 0){
+        end_temp(iter->arena_restore);
+        table_clear(&iter->already_used_table);
+    }
+    
+    block_zero_struct(iter);
+    iter->app = app;
+    iter->arena = arena;
+    
+    Scratch_Block scratch(app);
+    String_Match_List list = get_complete_list_raw(app, scratch, buffer, range, needle);
+    
+    iter->arena_restore = begin_temp(arena);
+    iter->first_buffer = buffer;
+    iter->current_buffer = buffer;
+    iter->needle = needle;
+    
+    iter->already_used_table = make_table_Data_u64(allocator, 100);
+    word_complete_list_extend_from_raw(app, arena, &list, &iter->list, &iter->already_used_table);
+    
+    iter->scan_all_buffers = true;
+}
+
 function void
 word_complete_iter_init(Buffer_ID buffer, Range_i64 range, Word_Complete_Iterator *iter){
     if (iter->app != 0 && iter->arena != 0){
-        Base_Allocator *allocator = get_base_allocator_system();
-        
         Application_Links *app = iter->app;
         Arena *arena = iter->arena;
-        
-        if (iter->already_used_table.allocator != 0){
-            end_temp(iter->arena_restore);
-            table_clear(&iter->already_used_table);
-        }
-        
-        block_zero_struct(iter);
-        iter->app = app;
-        iter->arena = arena;
-        
-        Scratch_Block scratch(app);
         String_Const_u8 needle = push_buffer_range(app, arena, buffer, range);
-        String_Match_List list = get_complete_list_raw(app, scratch, buffer, range, needle);
-        
-        iter->arena_restore = begin_temp(arena);
-        iter->first_buffer = buffer;
-        iter->current_buffer = buffer;
-        iter->needle = needle;
-        
-        iter->already_used_table = make_table_Data_u64(allocator, 100);
-        word_complete_list_extend_from_raw(app, arena, &list, &iter->list, &iter->already_used_table);
+        word_complete_iter_init__inner(buffer, needle, range, iter);
+    }
+}
+
+function void
+word_complete_iter_init(Buffer_ID first_buffer, String_Const_u8 needle, Word_Complete_Iterator *iter){
+    if (iter->app != 0 && iter->arena != 0){
+        word_complete_iter_init__inner(first_buffer, needle, Ii64(), iter);
+    }
+}
+
+function void
+word_complete_iter_init(String_Const_u8 needle, Word_Complete_Iterator *iter){
+    if (iter->app != 0 && iter->arena != 0){
+        Application_Links *app = iter->app;
+        Buffer_ID first_buffer = get_buffer_next(app, 0, Access_Read);
+        word_complete_iter_init__inner(first_buffer, needle, Ii64(), iter);
     }
 }
 
+function void
+word_complete_iter_stop_on_this_buffer(Word_Complete_Iterator *iter){
+    iter->scan_all_buffers = false;
+}
+
 function void
 word_complete_iter_next(Word_Complete_Iterator *it){
     for (;;){
@@ -346,6 +375,10 @@ word_complete_iter_next(Word_Complete_Iterator *it){
             break;
         }
 
+        if (!it->scan_all_buffers){
+            break;
+        }
+        
         Application_Links *app = it->app;
         Buffer_ID next = get_buffer_next_looped(app, it->current_buffer, Access_Read);
         if (next == it->first_buffer){

custom/4coder_search.h

@@ -20,6 +20,7 @@ struct Word_Complete_Iterator{
     Temp_Memory arena_restore;
     Buffer_ID first_buffer;
     Buffer_ID current_buffer;
+    b32 scan_all_buffers;
     String_Const_u8 needle;
 
     List_String_Const_u8 list;

custom/4coder_types.h

@@ -469,7 +469,6 @@ api(custom)
 typedef u32 Glyph_Flag;
 enum{
     GlyphFlag_None = 0x0,
-    GlyphFlag_Rotate90 = 0x1,
 };
 
 api(custom)

custom/generated/command_metadata.h

@@ -501,8 +501,8 @@ static Command_Metadata fcoder_metacmd_table[245] = {
 { PROC_LINKS(undo_all_buffers, 0), false, "undo_all_buffers", 16, "Advances backward through the undo history in the buffer containing the most recent regular edit.", 97, "w:\\4ed\\code\\custom\\4coder_base_commands.cpp", 43, 1862 },
 { PROC_LINKS(view_buffer_other_panel, 0), false, "view_buffer_other_panel", 23, "Set the other non-active panel to view the buffer that the active panel views, and switch to that panel.", 104, "w:\\4ed\\code\\custom\\4coder_base_commands.cpp", 43, 1623 },
 { PROC_LINKS(view_jump_list_with_lister, 0), false, "view_jump_list_with_lister", 26, "When executed on a buffer with jumps, creates a persistent lister for all the jumps", 83, "w:\\4ed\\code\\custom\\4coder_jump_lister.cpp", 41, 59 },
-{ PROC_LINKS(word_complete, 0), false, "word_complete", 13, "Iteratively tries completing the word to the left of the cursor with other words in open buffers that have the same prefix string.", 130, "w:\\4ed\\code\\custom\\4coder_search.cpp", 36, 397 },
-{ PROC_LINKS(word_complete_drop_down, 0), false, "word_complete_drop_down", 23, "Word complete with drop down menu.", 34, "w:\\4ed\\code\\custom\\4coder_search.cpp", 36, 644 },
+{ PROC_LINKS(word_complete, 0), false, "word_complete", 13, "Iteratively tries completing the word to the left of the cursor with other words in open buffers that have the same prefix string.", 130, "w:\\4ed\\code\\custom\\4coder_search.cpp", 36, 430 },
+{ PROC_LINKS(word_complete_drop_down, 0), false, "word_complete_drop_down", 23, "Word complete with drop down menu.", 34, "w:\\4ed\\code\\custom\\4coder_search.cpp", 36, 677 },
 { PROC_LINKS(write_block, 0), false, "write_block", 11, "At the cursor, insert a block comment.", 38, "w:\\4ed\\code\\custom\\4coder_combined_write_commands.cpp", 53, 94 },
 { PROC_LINKS(write_hack, 0), false, "write_hack", 10, "At the cursor, insert a '// HACK' comment, includes user name if it was specified in config.4coder.", 99, "w:\\4ed\\code\\custom\\4coder_combined_write_commands.cpp", 53, 82 },
 { PROC_LINKS(write_note, 0), false, "write_note", 10, "At the cursor, insert a '// NOTE' comment, includes user name if it was specified in config.4coder.", 99, "w:\\4ed\\code\\custom\\4coder_combined_write_commands.cpp", 53, 88 },

ship_files/changes.txt

@@ -1,6 +1,7 @@
 
 4.1.6
  + In config.4coder "bind_by_physical_key" uses a key-layout that does not change with language
+ + Deprecated GlyphFlag_Rotate90, rotation of immediate mode text is entirely derived from the delta vector
  + Fix: notepad like mode scrolling only creates selection when holding mouse L-buttoon
  + Fix: on windows the window has the 4coder icon
  + Fix: by default platform layer uses key codes arranged by the system language