new Dockerfile, new build arguments for default screen dimensions

Dockerfile

@@ -7,7 +7,9 @@ RUN apt-get update && \
         git \
         libglew-dev \
         libsdl2-dev \
-        python3
+        python3 \
+        python-is-python3
+
 
 RUN mkdir /sm64ex
 WORKDIR /sm64ex
@@ -15,3 +17,33 @@ ENV PATH="/sm64ex/tools:${PATH}"
 
 CMD echo 'Usage: docker run --rm -v ${PWD}:/sm64ex sm64ex make BETTERCAMERA=1 EXTERNAL_DATA=1 -j4\n' \
          'See https://github.com/sm64pc/sm64ex/wiki/Compiling-on-Docker for more information'
+
+FROM build AS web
+
+WORKDIR /
+
+RUN git clone https://github.com/emscripten-core/emsdk.git
+
+RUN /emsdk/emsdk install 1.39.5
+RUN /emsdk/emsdk activate 1.39.5
+
+# normally you'd run 'source $EMSDK/emsdk_env.sh' to load the emsdk environment
+# both Dockerfile and Makefile run each process in a separate subshell so I don't think something like
+#  RUN . /emsdk/emsdk_env.sh
+# will work, nor would doing the same within the Makefile
+# wouldn't be an issue on a bare metal build as the user would have already sourced the file per emsdk docs
+# also, the env script only works in bash, not sh, and I'm not sure about changing shells in Docker
+# versions are pinned, so we can live with it, I guess. node version will change if emsdk is updated
+# run
+#   docker run --rm sm64ex bash -c '. /emsdk/emsdk_env.sh'
+# to print the emsdk environment after a version change
+ENV EMSDK="/emsdk"
+ENV EM_CACHE="/emsdk/upstream/emscripten/cache"
+ENV EM_CONFIG="/emsdk/.emscripten"
+ENV EMSDK_NODE="/emsdk/node/16.20.0_64bit/bin/node"
+ENV PATH="${EMSDK}:${EMSDK_NODE}:${EMSDK}/upstream/emscripten:${PATH}"
+
+WORKDIR /sm64ex
+
+CMD echo 'Usage: docker run --rm -v ${PWD}:/sm64ex sm64ex make BETTERCAMERA=1 EXTERNAL_DATA=1 -j4\n' \
+         'See https://github.com/sm64pc/sm64ex/wiki/Compiling-on-Docker for more information'

Makefile

@@ -77,6 +77,10 @@ BASEPACK ?= base.zip
 
 WINDOWS_BUILD ?= 0
 
+# default screen size
+WINDOW_WIDTH ?= 640
+WINDOW_HEIGHT ?= 480
+
 # Attempt to detect OS
 
 ifeq ($(OS),Windows_NT)
@@ -227,6 +231,8 @@ COMPARE := 0
 
 ifeq ($(TARGET_WEB),1)
   VERSION_CFLAGS := $(VERSION_CFLAGS) -DTARGET_WEB -DUSE_GLES
+  VERSION_CFLAGS += -DWINDOW_WIDTH=$(WINDOW_WIDTH)
+  VERSION_CFLAGS += -DWINDOW_HEIGHT=$(WINDOW_HEIGHT)
 endif
 
 # Check backends

README.md

@@ -1,3 +1,37 @@
+# sm64ex-web
+
+Modifications to original project Dockerfile to build the emscripten web version of sm64ex
+
+You can probably do this on bare metal by installing emsdk version 1.39.5 along with all normal sm64ex dependencies, but easier to use docker
+
+Instructions:
+
+```
+git clone https://github.com/queenkjuul/sm64ex-web.git
+cd sm64ex-web
+cp /path/to/your/baserom.us.z64 .
+docker build . -t sm64ex --target web
+docker run --rm -v $(pwd):/sm64ex sm64ex make TARGET_WEB=1 -j$(nproc)
+docker run --rm -v $(pwd):/sm64ex sm64ex make TARGET_WEB=1 -j$(nproc)
+```
+
+Yes, that one command is run twice. No idea why that is necessary, but it is.
+
+After successful build, you can easily test if you have Node installed:
+
+```
+cd build/us_web
+npx http-server
+```
+
+## Additional features
+
+I can't get fullscreen working, or real time canvas resizing, but I did add build flags that let you specify the width and height:
+
+```
+docker run --rm -v $(pwd):/sm64ex sm64ex make TARGET_WEB=1 WINDOW_WIDTH=1280 WINDOW_HEIGHT=720 -j$(nproc)
+```
+
 # sm64ex
 Fork of [sm64-port/sm64-port](https://github.com/sm64-port/sm64-port) with additional features. 
 

src/pc/gfx/gfx_screen_config.h

@@ -1,7 +1,15 @@
 #ifndef GFX_SCREEN_CONFIG_H
 #define GFX_SCREEN_CONFIG_H
 
+#ifdef WINDOW_WIDTH
+#define DESIRED_SCREEN_WIDTH WINDOW_WIDTH
+#else
 #define DESIRED_SCREEN_WIDTH 640
-#define DESIRED_SCREEN_HEIGHT 480
-
+#endif
+
+#ifdef WINDOW_HEIGHT
+#define DESIRED_SCREEN_HEIGHT WINDOW_HEIGHT
+#else
+#define DESIRED_SCREEN_HEIGHT 480
+#endif
 #endif