From d3ea551024da72a05570403a311986e1571881a5 Mon Sep 17 00:00:00 2001
From: En Yi <en.yi@tutanota.com>
Date: Tue, 27 Aug 2024 15:49:05 +0800
Subject: [PATCH] Tweak engine config to allow web build

Internal Changelog:
- Reduce particles number
- Use webGL2
---
 CMakeLists.txt       |  2 +-
 engine/engine_conf.h | 10 ++++++----
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4cec5e2..1de6547 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,7 +10,7 @@ set(LIBZSTD_DIR /usr/local/lib CACHE FILEPATH "directory to zstd")
 if (EMSCRIPTEN)
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS}")
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DPLATFORM_WEB")
-set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -s USE_GLFW=3 -s ASSERTIONS=1 -s WASM=1 -s ASYNCIFY  -s TOTAL_MEMORY=16777216 -s TOTAL_STACK=1048576 --preload-file ./res ")
+set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -s USE_GLFW=3 -s ASSERTIONS=1 -s WASM=1 -s ASYNCIFY -s MIN_WEBGL_VERSION=2 -s MAX_WEBGL_VERSION=2 -s TOTAL_MEMORY=16777216 -s TOTAL_STACK=1048576 --preload-file ./res ")
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
 
 set(CMAKE_EXECUTABLE_SUFFIX ".html")
diff --git a/engine/engine_conf.h b/engine/engine_conf.h
index 5727363..5a2569c 100644
--- a/engine/engine_conf.h
+++ b/engine/engine_conf.h
@@ -1,11 +1,13 @@
 #ifndef _ENGINE_CONF_H
 #define _ENGINE_CONF_H
 
-#define MAX_SCENES_TO_RENDER 16
+// Take care tuning these params. Web build doesn't work
+// if memory used too high
+#define MAX_SCENES_TO_RENDER 8
 #define MAX_RENDER_LAYERS 4
 #define MAX_ENTITIES 2047
 #define MAX_TEXTURES 16
-#define MAX_SPRITES 128
+#define MAX_SPRITES 127
 #define MAX_SOUNDS 32
 #define MAX_FONTS 4
 #define MAX_N_TILES 16384
@@ -14,8 +16,8 @@
 #define N_SFX 32
 #define MAX_EMITTER_CONF 8
 //#define MAX_PARTICLE_EMITTER 8
-#define MAX_ACTIVE_PARTICLE_EMITTER 512
-#define MAX_PARTICLES 64
+#define MAX_ACTIVE_PARTICLE_EMITTER 255
+#define MAX_PARTICLES 32
 
 #define MAX_TILE_TYPES 16
 #define N_TAGS 10