Day 37 completed

.gitignore

@@ -29,3 +29,4 @@ build
 data/test.out
 data/handmade_engine.symbols
 data/handmade_win32.exe
+data/content/offical

README.md

@@ -33,7 +33,7 @@ Module build order:
 
 ## Milestone
 
-Day 36 : Loading BMPs
+Day 37 : Basic Bitmap Rendering
 
 Features Done so far:
 
@@ -59,9 +59,13 @@ Features Done so far:
   * Record & replay input.
   * WIP : 2.5D Tile Map
     * Virtualized into chunks
+  * Bitmap file loading & basic rendering
 
 ## Gallery
 
+![img](docs/imgs/handmade_win32_2023-10-20_23-14-37.png)
+![img](docs/imgs/Code_2023-10-20_21-57-06.png)
+![img](docs/imgs/handmade_win32_2023-10-19_22-57-13.gif)
 ![img](docs/imgs/handmade_win32_2023-10-19_14-07-20.png)
 ![img](docs/imgs/handmade_win32_2023-10-16_23-08-11.png)
 ![img](docs/imgs/handmade_win32_2023-10-11_23-39-57.gif)

docs/Day 037.md

@@ -0,0 +1,10 @@
+# Day 37
+
+I went ahead and did some extra stuff.  
+My "hero" is a mojito bmp for now. I'll eventually do something else for it.  
+I also added incremental build support for the codegen metaprograms.
+
+I originally wanted to make the assets on the fly (just as a break from the code),  
+but decided to just use his assets as this series is already going to take forever.
+
+I have the assets mapped to an "offical" directory within content, however they'll be naturally ignored on the repo.

project/codegen/engine_postbuild_gen.cpp

@@ -71,7 +71,7 @@ int gen_main()
 
 #pragma push_macro("str_ascii")
 #undef str_ascii
-	Builder builder = Builder::open( "engine_symbol_table.hpp" );
+	Builder builder = Builder::open( "engine_symbols.gen.hpp" );
 	builder.print( pragma_once );
 	builder.print( def_include( txt("engine/engine.hpp") ) );
 	builder.print( fmt_newline );

project/engine/engine.cpp

@@ -238,44 +238,58 @@ void draw_rectangle( OffscreenBuffer* buffer
 
 internal
 void draw_bitmap( OffscreenBuffer* buffer
-	, f32 min_x, f32 min_y
+	, f32 pos_x, f32 pos_y
-	, f32 max_x, f32 max_y
+	, Bitmap* bitmap )
-	, u32* pixels, u32 size )
 {
-	s32 min_x_32 = round( min_x );
+	s32 half_width  = bitmap->width / 2;
-	s32 min_y_32 = round( min_y );
+	s32 half_height = bitmap->height / 2;
-	s32 max_x_32 = round( max_x );
+
-	s32 max_y_32 = round( max_y );
+	s32 min_x = round( pos_x ) - half_width;
+	s32 min_y = round( pos_y ) - half_height;
+	s32 max_x = round( pos_x ) + half_width;
+	s32 max_y = round( pos_y ) + half_height;
+
+	s32 bmp_start_x = min_x < 0 ? min_x * -1 : 0;
+	u32 bmp_start_y = min_y < 0 ? bitmap->height + min_y - 1 : bitmap->height - 1;
 
 	s32 buffer_width  = buffer->width;
 	s32 buffer_height = buffer->height;
 
-	if ( min_x_32 < 0 )
+	if ( min_x < 0 )
-		min_x_32 = 0;
+		min_x = 0;
-	if ( min_y_32 < 0 )
+	if ( min_y < 0 )
-		min_y_32 = 0;
+		min_y = 0;
-	if ( max_x_32 > buffer_width )
+	if ( max_x > buffer_width )
-		max_x_32 = buffer_width;
+		max_x = buffer_width;
-	if ( max_y_32 > buffer_height )
+	if ( max_y > buffer_height )
-		max_y_32 = buffer_height;
+		max_y = buffer_height;
 
 	// Start with the pixel on the top left corner of the rectangle
 	u8* row = rcast(u8*, buffer->memory )
-	          + min_x_32 * buffer->bytes_per_pixel
+	          + min_x * buffer->bytes_per_pixel
-	          + min_y_32 * buffer->pitch;
+	          + min_y * buffer->pitch;
 
-	for ( s32 y = min_y_32; y < max_y_32; ++ y )
+	s32 bmp_y = bmp_start_y;
+	for ( s32 y = min_y; y < max_y; ++ y )
 	{
 		s32* pixel_32 = rcast(s32*, row);
 
-		for ( s32 x = min_x_32; x < max_x_32; ++ x )
+		s32 bmp_x = bmp_start_x;
+		for ( s32 x = min_x; x < max_x; ++ x )
 		{
-			u32 color = pixels[ y * max_x_32 + x ];
+			u32 color = bitmap->pixels[ bmp_y * bitmap->width + bmp_x ];
 
-			*pixel_32 = color;
+			// TODO(Ed): This is a bad alpha check, fix it.
-			pixel_32++;
+			// if ( (color >> 24) != 0 )
+			// {
+				*pixel_32 = color;
+			// }
+			++ pixel_32;
+			++ bmp_x;
 		}
+
 		row += buffer->pitch;
+		-- bmp_y;
 	}
 }
 
@@ -293,23 +307,52 @@ void draw_debug_point(OffscreenBuffer* back_buffer, World* world, TileMapPositio
 }
 
 internal
-Bitmap load_bmp( platform::FileReadContentFn* file_read_content, Str file_path  )
+Bitmap load_bmp( platform::ModuleAPI* platform_api, Str file_path  )
 {
 	Bitmap result {};
 
 	platform::File file {
 		file_path
 	};
-	if ( ! file_read_content( & file ) )
+	if ( ! platform_api->file_read_content( & file ) )
 	{
+
 		return result;
 	}
 
 	BitmapHeaderPacked* header = pcast(BitmapHeaderPacked*, file.data);
+	// Note: Byte order is in little-endian AA BB GG RR (bottom up) (ABGR)
+	//
+
+	// TODO(Ed) : Do not directly assign this, allocate the pixels to somewhere in game or engine persistent.
 	result.pixels         = rcast(u32*, rcast(Byte*, file.data) + header->bitmap_offset);
 	result.width          = header->width;
 	result.height         = header->height;
 	result.bits_per_pixel = header->bits_per_pixel;
+
+	u32* src = result.pixels;
+	// Note: Do not use this generically, code is bad)
+	for ( s32 y = 0; y < header->width; ++ y )
+	{
+		for ( s32 x = 0; x < header->height; ++ x )
+		{
+			struct Pixel
+			{
+				u8 Alpha;
+				u8 Blue;
+				u8 Green;
+				u8 Red;
+			};
+
+			Pixel* px = rcast(Pixel*, src);
+			Pixel cpy = *px;
+			// *src = (u32(px->Alpha) << 0) | (u32(px->Red) << 24) | (u32(px->Green) << 16) | (u32(px->Blue) << 8);
+			*src = (*src >> 8) | (*src << 24);
+			++ src;
+		}
+	}
+
+	//platform_api->file_close( & file );
 	return result;
 }
 
@@ -542,13 +585,43 @@ void startup( OffscreenBuffer* back_buffer, Memory* memory, platform::ModuleAPI*
 	hh::GameState* game_state = rcast( hh::GameState*, state->game_memory.persistent );
 	assert( sizeof(hh::GameState) <= state->game_memory.persistent_size );
 
-	StrPath path_test_bg;
+	// Personally made assets
-	path_test_bg.concat( platform_api->path_content, str_ascii("test_background.bmp") );
+	{
-	game_state->test_bg = load_bmp( platform_api->file_read_content, path_test_bg );
+		StrPath path_test_bg;
+		path_test_bg.concat( platform_api->path_content, str_ascii("test_background.bmp") );
+		game_state->test_bg = load_bmp( platform_api, path_test_bg );
 
-	StrPath path_mojito;
+		StrPath path_mojito;
-	path_mojito.concat( platform_api->path_content, str_ascii("mojito.bmp") );
+		path_mojito.concat( platform_api->path_content, str_ascii("mojito.bmp") );
-	game_state->mojito = load_bmp( platform_api->file_read_content, path_mojito );
+		game_state->mojito = load_bmp( platform_api, path_mojito );
+
+		StrPath path_mojito_head;
+		path_mojito_head.concat( platform_api->path_content, str_ascii("mojito_head.bmp") );
+		game_state->mojito_head = load_bmp( platform_api, path_mojito_head );
+
+		StrPath path_debug_bitmap;
+		path_debug_bitmap.concat( platform_api->path_content, str_ascii("debug_bitmap2.bmp") );
+		game_state->debug_bitmap = load_bmp( platform_api, path_debug_bitmap );
+	}
+
+	// Offical assets
+	{
+		StrPath path_test_bg_hh;
+		path_test_bg_hh.concat( platform_api->path_content, str_ascii("offical/test/test_background.bmp"));
+		game_state->test_bg_hh = load_bmp( platform_api, path_test_bg_hh );
+
+		StrPath path_hero_front_head;
+		path_hero_front_head.concat( platform_api->path_content, str_ascii("offical/test/test_hero_front_head.bmp"));
+		game_state->hero_front_head = load_bmp( platform_api, path_hero_front_head );
+
+		StrPath path_hero_front_cape;
+		path_hero_front_cape.concat( platform_api->path_content, str_ascii("offical/test/test_hero_front_cape.bmp"));
+		game_state->hero_front_cape = load_bmp( platform_api, path_hero_front_cape );
+
+		StrPath path_hero_front_torso;
+		path_hero_front_torso.concat( platform_api->path_content, str_ascii("offical/test/test_hero_front_torso.bmp"));
+		game_state->hero_front_torso = load_bmp( platform_api, path_hero_front_torso );
+	}
 
 	hh::PlayerState* player = & game_state->player_state;
 	player->position.tile_x     = 4;
@@ -833,6 +906,11 @@ void update_and_render( f32 delta_time, InputState* input, OffscreenBuffer* back
 		, 1.f, 0.24f, 0.24f );
 
 
+	draw_bitmap( back_buffer
+		, scast(f32, back_buffer->width) / 2.f, scast(f32, back_buffer->height) / 2.f
+		, & game_state->test_bg_hh
+	);
+
 // Scrolling
 	f32 screen_center_x = 0.5f * scast(f32, back_buffer->width);
 	f32 screen_center_y = 0.5f * scast(f32, back_buffer->height);
@@ -847,25 +925,25 @@ void update_and_render( f32 delta_time, InputState* input, OffscreenBuffer* back
 			u32 tile_id  = TileMap_get_tile_value( tile_map, col, row, player->position.tile_z );
 			f32 color[3] = { 0.15f, 0.15f, 0.15f };
 
-			if ( tile_id > 0 )
+			if ( tile_id > 1 || row == player->position.tile_y && col == player->position.tile_x )
 			{
 				if ( tile_id == 2 )
 				{
-					color[0] = 0.22f;
+					color[0] = 0.42f;
-					color[1] = 0.22f;
+					color[1] = 0.42f;
-					color[2] = 0.22f;
+					color[2] = 0.52f;
 				}
 				if ( tile_id == 3 )
 				{
-					color[0] = 0.12f;
+					color[0] = 0.02f;
-					color[1] = 0.12f;
+					color[1] = 0.02f;
-					color[2] = 0.12f;
+					color[2] = 0.02f;
 				}
 				if ( tile_id == 4 )
 				{
-					color[0] = 0.52f;
+					color[0] = 0.42f;
-					color[1] = 0.52f;
+					color[1] = 0.62f;
-					color[2] = 0.52f;
+					color[2] = 0.42f;
 				}
 
 				if ( row == player->position.tile_y && col == player->position.tile_x )
@@ -884,26 +962,21 @@ void update_and_render( f32 delta_time, InputState* input, OffscreenBuffer* back
 				f32 max_y = center_y + tile_size_in_pixels * 0.5f;
 
 				draw_rectangle( back_buffer
-				               , min_x, min_y
+	               , min_x, min_y
-				               , max_x, max_y
+	               , max_x, max_y
-				               , color[0], color[1], color[2] );
+	               , color[0], color[1], color[2] );
 			}
 		}
 	}
 
-//	draw_bitmap( back_buffer
-//		, 0, 0
-//		, scast(f32, game_state->mojito.width), scast(f32, game_state->mojito.height)
-//		, game_state->mojito.pixels, game_state->mojito.size
-//	);
-
 	// Bad bitmap test
+	#if 0
 	{
-		u32* src = game_state->mojito.pixels;
+		u32* src = game_state->mojito_head.pixels;
 		u32* dst = rcast(u32*, back_buffer->memory);
-		for ( s32 y = 0; y < game_state->mojito.height; ++ y )
+		for ( s32 y = 0; y < game_state->mojito_head.height; ++ y )
 		{
-			for ( s32 x = 0; x < game_state->mojito.width; ++ x )
+			for ( s32 x = 0; x < game_state->mojito_head.width; ++ x )
 			{
 				*dst = *src;
 				++ dst;
@@ -911,6 +984,7 @@ void update_and_render( f32 delta_time, InputState* input, OffscreenBuffer* back
 			}
 		}
 	}
+	#endif
 
 	// Player
 	f32 player_red   = 0.7f;
@@ -923,12 +997,16 @@ void update_and_render( f32 delta_time, InputState* input, OffscreenBuffer* back
 	f32 player_screen_pos_x = screen_center_x;
 	f32 player_screen_pos_y = screen_center_y;
 
-//	player_min_x = player_tile_x_offset - player_half_width * world;
+	draw_bitmap( back_buffer
+	            , player_screen_pos_x, player_screen_pos_y
+	            , & game_state->hero_front_head );
 
+#if 0
 	draw_rectangle( back_buffer
-	               , player_screen_pos_x - player_half_width * world->tile_meters_to_pixels, player_screen_pos_y - player->height * world->tile_meters_to_pixels
+		, player_screen_pos_x - player_half_width * world->tile_meters_to_pixels, player_screen_pos_y - player->height * world->tile_meters_to_pixels
-	               , player_screen_pos_x + player_half_width * world->tile_meters_to_pixels, player_screen_pos_y
+		, player_screen_pos_x + player_half_width * world->tile_meters_to_pixels, player_screen_pos_y
-	               , player_red, player_green, player_blue );
+		, player_red, player_green, player_blue );
+#endif
 
 	// Auto-Snapshot percent bar
 	if (1)

project/engine/engine.hpp

@@ -194,6 +194,16 @@ struct BitmapHeaderPacked
 	s32 height;
 	u16 planes;
 	u16 bits_per_pixel;
+	u32 compression;
+	u32 size_of_bitmap;
+	s32 horizontal_resolution;
+	s32 vertical_resolution;
+	u32 colors_used;
+	u32 colors_important;
+	
+	u32 red_mask;
+	u32 green_mask;
+	u32 blue_mask;
 };
 #pragma pack(pop)
 
@@ -203,7 +213,6 @@ struct Bitmap
 	s32  width;
 	s32  height;
 	u32  bits_per_pixel;
-	u32  size;
 };
 
 NS_ENGINE_END

project/engine/input.cpp

@@ -0,0 +1 @@
+

project/gen/Readme.md

@@ -1,3 +0,0 @@
-# Universal Generated Code
-
-This is for generated code used for multiple modules.

project/handmade.hpp

@@ -95,8 +95,17 @@ struct GameState
 {
 	PlayerState player_state;
 	
-	engine::Bitmap test_bg;
+	using Bitmap = engine::Bitmap;
-	engine::Bitmap mojito;
+	
+	Bitmap debug_bitmap;
+	Bitmap test_bg;
+	Bitmap mojito;
+	Bitmap mojito_head;
+	
+	Bitmap test_bg_hh;
+	Bitmap hero_front_head;
+	Bitmap hero_front_cape;
+	Bitmap hero_front_torso;
 };
 
 NS_HANDMADE_END

project/handmade_win32.cpp

@@ -24,7 +24,7 @@ Handmade Win32 Platform Translation Unit
 #include "engine/tile_map.hpp"
 #include "engine/engine.hpp"
 #include "engine/engine_to_platform_api.hpp"
-#include "gen/engine_symbol_table.hpp"
+#include "engine/gen/engine_symbols.gen.hpp"
 
 #include "jsl.hpp" // Using this to get dualsense controllers
 #include "win32/win32.hpp"

project/platform/win32/win32_platform.cpp

@@ -2,7 +2,7 @@
 #include "platform/platform.hpp"
 #include "engine/engine.hpp"
 #include "engine/engine_to_platform_api.hpp"
-#include "gen/engine_symbol_table.hpp"
+#include "engine/gen/engine_symbols.gen.hpp"
 #include "win32.hpp"
 #include "jsl.hpp"
 #endif

scripts/build.ps1

@@ -52,10 +52,45 @@ if ( -not $module_specified )
 # Load up toolchain configuraion
 . $config_toolchain
 
+function check-FileForChanges
+{
+    param(
+        [Parameter(Mandatory=$true)]
+        [string]$path_file
+    )
+
+    if (-not (Test-Path $path_file -PathType Leaf)) {
+        Write-Error "The provided path is not a valid file: $path_file"
+        return $false
+    }
+    $file_name = Split-Path $path_file -Leaf
+    $path_csv = Join-Path $path_build ($file_name + "_file_hash.csv")
+
+    $csv_file_hash = $null
+    if (Test-Path $path_csv) {
+        $csv_file_hash = Import-Csv $path_csv | Select-Object -ExpandProperty value
+    }
+
+    $current_hash_info = Get-FileHash -Path $path_file -Algorithm MD5
+    $current_file_hash = $current_hash_info.Hash
+
+    # Save the current hash to the CSV
+    [PSCustomObject]@{
+        name  = $path_file
+        value = $current_file_hash
+    } | Export-Csv $path_csv -NoTypeInformation
+
+    if ($csv_file_hash -and $csv_file_hash -eq $current_file_hash) {
+        return $false
+    } else {
+        return $true
+    }
+}
+
 # Check to see if the module has changed files since the last build
 function check-ModuleForChanges
 {
-	param( [string]$path_module )
+	param( [string]$path_module, [array]$excludes )
 
 	$module_name = split-path $path_module -leaf
 	$path_csv    = Join-Path $path_build ($module_name + "_module_hashes.csv")
@@ -69,7 +104,7 @@ function check-ModuleForChanges
 	}
 
 	$file_hashes = @{}
-	get-childitem -path $path_module -recurse -file | foreach-object {
+	get-childitem -path $path_module -recurse -file -Exclude $excludes | foreach-object {
 		$id                 = $_.fullname
 		$hash_info          = get-filehash -path $id -Algorithm MD5
 		$file_hashes[ $id ] = $hash_info.Hash
@@ -92,15 +127,16 @@ function check-ModuleForChanges
 #region Building
 write-host "Building HandmadeHero with $vendor"
 
-$path_project  = Join-Path $path_root    'project'
+$path_project    = Join-Path $path_root    'project'
-$path_scripts  = Join-Path $path_root    'scripts'
+$path_scripts    = Join-Path $path_root    'scripts'
-$path_data     = Join-Path $path_root	 'data'
+$path_data       = Join-Path $path_root	   'data'
-$path_binaries = Join-Path $path_data    'binaries'
+$path_binaries   = Join-Path $path_data    'binaries'
-$path_deps     = Join-Path $path_project 'dependencies'
+$path_deps       = Join-Path $path_project 'dependencies'
-$path_codegen  = Join-Path $path_project 'codegen'
+$path_codegen    = Join-Path $path_project 'codegen'
-$path_gen      = Join-Path $path_project 'gen'
+$path_platform   = Join-Path $path_project 'platform'
-$path_platform = Join-Path $path_project 'platform'
+$path_engine     = Join-Path $path_project 'engine'
-$path_engine   = Join-Path $path_project 'engine'
+$path_engine_gen = Join-Path $path_engine  'gen'
+
 
 $update_deps = Join-Path $PSScriptRoot 'update_deps.ps1'
 
@@ -150,9 +186,6 @@ else {
 	$compiler_args += ( $flag_define + 'Build_Development=0' )
 }
 
-$should_format_gen = $false
-
-# TODO(Ed) : Support detecting codegen changes separate from the module's runtime builds (so that it can be rebuild only when necessary as well)
 function build-engine
 {
 	$should_build = check-ModuleForChanges $path_engine
@@ -160,6 +193,7 @@ function build-engine
 		write-host "No changes detected in engine module, skipping build" -ForegroundColor Yellow
 		return $true
 	}
+	write-host "`nBuilding Engine Module" -ForegroundColor Green
 
 	$path_pdb_lock = Join-Path $path_binaries 'handmade_engine.pdb.lock'
 	New-Item $path_pdb_lock -ItemType File -Force > $null
@@ -171,36 +205,38 @@ function build-engine
 		if ( $verbose ) { Write-Host "Deleted $file" -ForegroundColor Green }
 	}
 
-	$local:includes = $script:includes
+	#region Building Engine Module Runtime
-	$includes      += $path_engine
+		$local:includes = $script:includes
+		$includes      += $path_engine
 
-	$local:compiler_args = $script:compiler_args
+		$local:compiler_args = $script:compiler_args
-	$compiler_args      += ($flag_define + 'Build_DLL=1' )
+		$compiler_args      += ($flag_define + 'Build_DLL=1' )
 
-	if ( $vendor -eq 'msvc' ) {
+		if ( $vendor -eq 'msvc' ) {
-		$compiler_args += ($flag_define + 'Engine_API=__declspec(dllexport)')
+			$compiler_args += ($flag_define + 'Engine_API=__declspec(dllexport)')
-	}
+		}
-	if ( $vendor -eq 'clang' ) {
+		if ( $vendor -eq 'clang' ) {
-		$compiler_args += ($flag_define + 'Engine_API=__attribute__((visibility("default")))')
+			$compiler_args += ($flag_define + 'Engine_API=__attribute__((visibility("default")))')
-	}
+		}
 
-	$local:linker_args = @(
+		$local:linker_args = @(
-		$flag_link_dll
+			$flag_link_dll
-		# $flag_link_optimize_references
+			# $flag_link_optimize_references
-	)
+		)
 
-	$unit            = Join-Path $path_project  'handmade_engine.cpp'
+		$unit            = Join-Path $path_project  'handmade_engine.cpp'
-	$dynamic_library = Join-Path $path_binaries 'handmade_engine.dll'
+		$dynamic_library = Join-Path $path_binaries 'handmade_engine.dll'
 
-	$build_result = build-simple $path_build $includes $compiler_args $linker_args $unit $dynamic_library
+		$build_result = build-simple $path_build $includes $compiler_args $linker_args $unit $dynamic_library
 
-	Remove-Item $path_pdb_lock -Force
+		Remove-Item $path_pdb_lock -Force
 
-	if ( $build_result -eq $false ) {
+		if ( $build_result -eq $false ) {
-		return $false
+			return $false
-	}
+		}
+	#endregion
 
-	#region CodeGen Post-Build
+	#CodeGen Post-Build
 	if ( -not $handmade_process_active -and $build_result )
 	{
 		$path_engine_symbols = Join-Path $path_build 'handmade_engine.symbols'
@@ -273,42 +309,58 @@ function build-engine
 			# Write the symbol table to a file
 			$engine_symbols.Values | Out-File -Path $path_engine_symbols
 		}
-
+		else {
-		# Delete old PDBs
+			return $false
-		$pdb_files = Get-ChildItem -Path $path_build -Filter "engine_postbuild_gen_*.pdb"
-		foreach ($file in $pdb_files) {
-			Remove-Item -Path $file.FullName -Force
-			if ($verbose) { Write-Host "Deleted $file" -ForegroundColor Green }
 		}
 
-		$compiler_args = @()
+		$unit         = Join-Path $path_codegen 'engine_postbuild_gen.cpp'
-		$compiler_args += ( $flag_define + 'GEN_TIME' )
+		$executable   = Join-Path $path_build 'engine_postbuild_gen.exe'
-
+		$should_build = (check-FileForChanges $unit) -eq $true
-		$linker_args = @(
+		if ( $should_build )
-			$flag_link_win_subsystem_console
-		)
-
-		$unit       = Join-Path $path_codegen 'engine_postbuild_gen.cpp'
-		$executable = Join-Path $path_build   'engine_postbuild_gen.exe'
-
-		if ( build-simple $path_build $local:includes $compiler_args $linker_args $unit $executable ) 
 		{
-			Push-Location $path_build
+			# Delete old PDBs
-			$time_taken = Measure-Command {
+			$pdb_files = Get-ChildItem -Path $path_build -Filter "engine_postbuild_gen_*.pdb"
-				& $executable 2>&1 | ForEach-Object {
+			foreach ($file in $pdb_files) {
-					write-host `t $_ -ForegroundColor Green
+				Remove-Item -Path $file.FullName -Force
-				}
+				if ($verbose) { Write-Host "Deleted $file" -ForegroundColor Green }
 			}
-			Pop-Location
 
-			$path_generated_file = Join-Path $path_build 'engine_symbol_table.hpp'
+			$compiler_args = @()
-			move-item $path_generated_file (join-path $path_gen (split-path $path_generated_file -leaf)) -Force
+			$compiler_args += ( $flag_define + 'GEN_TIME' )
-			$script:should_format_gen = $true
 
-			return $true
+			$linker_args = @(
+				$flag_link_win_subsystem_console
+			)
+
+			$build_result = build-simple $path_build $local:includes $compiler_args $linker_args $unit $executable
+			if ( $build_result -eq $false ) {
+				return $false
+			}
+		}
+		else {
+			write-host "No changes detected in engine post-build gen, skipping build" -ForegroundColor Yellow
 		}
 
-		return $false
+		Push-Location $path_build
+		$time_taken = Measure-Command {
+			& $executable 2>&1 | ForEach-Object {
+				write-host `t $_ -ForegroundColor Green
+			}
+		}
+		Pop-Location
+
+		$path_generated_file = Join-Path $path_build  'engine_symbols.gen.hpp'
+		move-item $path_generated_file (join-path $path_engine_gen (split-path $path_generated_file -leaf)) -Force
+
+		push-location $path_scripts
+			$include = @(
+				'*.cpp'
+				'*.hpp'
+			)
+			format-cpp $path_engine_gen $include
+		pop-location
+
+		return $true
 	}
 }
 if ( $engine ) {
@@ -331,9 +383,13 @@ function build-platform
 		write-host "No changes detected in platform module, skipping build" -ForegroundColor Yellow
 		return $true
 	}
+	write-host "Building Platform Module" -ForegroundColor Green
 
 	# CodeGen Pre-Build
-	if ( $true )
+	$path_engine_symbols = Join-Path $path_engine_gen 'engine_symbols.gen.hpp'
+	$unit                = Join-Path $path_codegen    'platform_gen.cpp'
+	$should_build        = (check-FileForChanges $unit) -eq $true -or (check-FileForChanges $path_engine_symbols) -eq $true
+	if ( $should_build )
 	{
 		# Delete old PDBs
 		$pdb_files = Get-ChildItem -Path $path_build -Filter "platform_gen_*.pdb"
@@ -374,7 +430,16 @@ function build-platform
 		}
 		Pop-Location
 
-		$script:should_format_gen = $true
+		push-location $path_scripts
+			$include = @(
+				'*.cpp'
+				'*.hpp'
+			)
+			format-cpp (Join-Path $path_platform 'gen' ) $include
+		pop-location
+	}
+	else {
+		write-host "No changes detected in platform gen, skipping build" -ForegroundColor Yellow
 	}
 
 	# Delete old PDBs
@@ -403,7 +468,6 @@ function build-platform
 	$executable = Join-Path $path_binaries 'handmade_win32.exe'
 
 	return build-simple $path_build $includes $compiler_args $linker_args $unit $executable
-
 }
 if ( $platform ) {
 	$build_result = build-platform
@@ -421,18 +485,5 @@ if ( (Test-Path $path_jsl_dll) -eq $false )
 }
 #endregion Handmade Runtime
 
-if ( $should_format_gen )
-{
-	write-host 'Formatting...'
-	push-location $path_scripts
-	$include = @(
-		'*.cpp'
-		'*.hpp'
-	)
-	format-cpp $path_gen $include
-	format-cpp (Join-Path $path_platform 'gen' ) $include
-	pop-location
-}
-
 Pop-Location
 #endregion Building