lkarch.org/tools/webretro/source/patches/retroarch.patch

diff --git a/Makefile.common b/Makefile.common
index a18e5838b8..9610e32517 100644
--- a/Makefile.common
+++ b/Makefile.common
@@ -1500,10 +1500,11 @@ ifeq ($(HAVE_GL_CONTEXT), 1)
       DEF_FLAGS += $(OPENGLES_CFLAGS)
       ifeq ($(HAVE_OPENGLES3), 1)
          DEFINES += -DHAVE_OPENGLES3
+         OBJ += $(LIBRETRO_COMM_DIR)/glsym/glsym_es3.o
       else
          DEFINES += -DHAVE_OPENGLES2
+         OBJ += $(LIBRETRO_COMM_DIR)/glsym/glsym_es2.o
       endif
-      OBJ += $(LIBRETRO_COMM_DIR)/glsym/glsym_es2.o
    else
       DEFINES += -DHAVE_GL_SYNC
       OBJ += $(LIBRETRO_COMM_DIR)/glsym/glsym_gl.o
diff --git a/Makefile.emscripten b/Makefile.emscripten
index d6de1b9805..2e1ccca52e 100644
--- a/Makefile.emscripten
+++ b/Makefile.emscripten
@@ -9,11 +9,8 @@ endif
 EOPT = USE_ZLIB=1 # Emscripten specific options
 EOPTS = $(addprefix -s $(EMPTY), $(EOPT)) # Add '-s ' to each option
 
-PTHREAD = 0
 OS = Emscripten
 OBJ :=
-DEFINES := -DRARCH_INTERNAL -DHAVE_MAIN -s USE_PTHREADS=$(PTHREAD)
-DEFINES += -DHAVE_FILTERS_BUILTIN
 
 HAVE_DSP_FILTER = 1
 HAVE_VIDEO_FILTER = 1
@@ -25,7 +22,6 @@ HAVE_AUDIOMIXER = 1
 HAVE_VIDEO_LAYOUT = 0
 HAVE_CC_RESAMPLER = 1
 HAVE_EGL    = 1
-HAVE_OPENGLES = 1
 HAVE_RJPEG  = 0
 HAVE_RPNG   = 1
 HAVE_EMSCRIPTEN = 1
@@ -42,42 +38,101 @@ HAVE_STB_FONT = 1
 HAVE_CONFIGFILE = 1
 HAVE_CHEATS = 1
 HAVE_IBXM = 1
+HAVE_PATCH = 1
 
 ASYNC ?= 0
-ifeq ($(LIBRETRO), mupen64plus)
-   ASYNC = 1
-endif
-
+PTHREAD ?= 0
 LTO ?= 0
-ifeq ($(LIBRETRO), tyrquake)
-   LTO = 0
-endif
 
-MEMORY ?= 134217728
+DEFINES := -DRARCH_INTERNAL -DHAVE_MAIN
+DEFINES += -DHAVE_FILTERS_BUILTIN -DNO_MISSING_ASSET_WARNING -DNO_AUTO_CANVAS_RESIZE -DWEB_SCALING -DNO_CANVAS_FULLSCREEN -DNO_INITIAL_CANVAS_RESIZE
+
+HAVE_OPENGL = 0 # not supported
+EM_OPENGL ?= 0
+HAVE_REGAL ?= 0
+
+HAVE_OPENGLES ?= 1
+HAVE_OPENGLES3 ?= 0
+
+GL_DEBUG ?= 0 # help diagnose GLSL problems (can cause errors in normal operation)
+GENERATE_SOURCEMAP ?= 0
+FS_DEBUG = 0
+
+# default value: 5242880  (5 MiB)
+STACK_MEMORY ?= 8388608
+# default value: 16777216 (16 MiB)
+HEAP_MEMORY ?= 536870912
+
+# 8388608 ----- 8 MiB (Stack: recommended)
+# 16777216 ---- 16 MiB
+# 33554432 ---- 32 MiB
+# 67108864 ---- 64 MiB
+# 134217728 --- 128 MiB
+# 268435456 --- 256 MiB (Heap: recommended) (Stack: recommended for some cores [mupen64plus_next])
+# 536870912 --- 512 MiB (Heap: needed for some cores [mednafen_psx(_hw), mupen64plus_next])
+# 1073741824 -- 1 GiB
+# 1610612736 -- 1.5 GiB
+# 2147483648 -- 2 GiB
 
 PRECISE_F32 = 1
 
 OBJDIR := obj-emscripten
 
-#if you compile with SDL2 flag add this Emscripten flag "-s USE_SDL=2" to LDFLAGS:
+EXPORTED_FUNCTIONS = "['_main', '_malloc', '_cmd_savefiles', '_cmd_save_state', '_cmd_load_state', '_cmd_undo_save_state', '_cmd_undo_load_state', '_cmd_take_screenshot', '_cmd_toggle_menu', '_cmd_reload_config', '_cmd_toggle_grab_mouse', '_cmd_toggle_game_focus', '_cmd_reset', '_cmd_toggle_pause', '_cmd_pause', '_cmd_unpause', '_cmd_set_volume', '_cmd_set_shader', '_cmd_cheat_set_code', '_cmd_cheat_get_code', '_cmd_cheat_toggle_index', '_cmd_cheat_get_code_state', '_cmd_cheat_realloc', '_cmd_cheat_get_size', '_cmd_cheat_apply_cheats']"
 
 LIBS    := -s USE_ZLIB=1
-LDFLAGS := -L. --no-heap-copy -s $(LIBS) -s TOTAL_MEMORY=$(MEMORY) -s NO_EXIT_RUNTIME=0 -s FULL_ES2=1 -s "EXTRA_EXPORTED_RUNTIME_METHODS=['callMain']" \
-           -s ALLOW_MEMORY_GROWTH=1 -s EXPORTED_FUNCTIONS="['_main', '_malloc', '_cmd_savefiles', '_cmd_save_state', '_cmd_load_state', '_cmd_take_screenshot']" \
+
+ifeq ($(HAVE_SDL2), 1)
+   LIBS += -s USE_SDL=2
+   DEFINES += -DHAVE_SDL2
+endif
+
+LDFLAGS := -L. --no-heap-copy $(LIBS) -s TOTAL_STACK=$(STACK_MEMORY) -s TOTAL_MEMORY=$(HEAP_MEMORY) -s NO_EXIT_RUNTIME=0 -s EXPORTED_RUNTIME_METHODS="['callMain', 'FS']" -s EXPORTED_FUNCTIONS=$(EXPORTED_FUNCTIONS) \
            --js-library emscripten/library_rwebaudio.js \
            --js-library emscripten/library_rwebcam.js \
            --js-library emscripten/library_errno_codes.js
+
+ifeq ($(HAVE_OPENGLES), 1)
+   ifeq ($(HAVE_OPENGLES3), 1)
+      LDFLAGS += -s FULL_ES3=1 -s MIN_WEBGL_VERSION=2 -s MAX_WEBGL_VERSION=2
+   else
+      LDFLAGS += -s FULL_ES2=1
+   endif
+endif
+ifeq ($(EM_OPENGL), 1)
+   DEFINES += -DEM_OPENGL
+   ifeq ($(HAVE_REGAL), 1)
+      LDFLAGS += -s USE_REGAL=1
+      DEFINES += -DHAVE_REGAL
+   else
+      LDFLAGS += -s LEGACY_GL_EMULATION=1 -s GL_UNSAFE_OPTS=0
+   endif
+endif
+
+ifeq ($(GL_DEBUG), 1)
+   LDFLAGS += -s GL_ASSERTIONS=1 -s GL_DEBUG=1
+endif
+
+ifeq ($(FS_DEBUG), 1)
+   LDFLAGS += -s FS_DEBUG=1
+endif
+
 ifneq ($(PTHREAD), 0)
-   LDFLAGS += -s USE_PTHREADS=$(PTHREAD) -s PTHREAD_POOL_SIZE=2
+   CFLAGS += -pthread
+   CXXFLAGS += -pthread
+   LDFLAGS += -pthread -s PTHREAD_POOL_SIZE=4
+else
+   LDFLAGS += -s ALLOW_MEMORY_GROWTH=1
 endif
 
 ifeq ($(ASYNC), 1)
-   LDFLAGS += -s ASYNCIFY=$(ASYNC)
+   LDFLAGS += -s ASYNCIFY=1 -s ASYNCIFY_STACK_SIZE=131072
 endif
 
-ifeq ($(HAVE_SDL2), 1)
-   LIBS += -s USE_SDL=2
-   DEFINES += -DHAVE_SDL2
+ifeq ($(GENERATE_SOURCEMAP), 1)
+   CFLAGS += -g4
+   CXXFLAGS += -g4
+   LDFLAGS += -g4 --source-map-base http://localhost:8000/cores/ # -gsource-map
 endif
 
 include Makefile.common
@@ -102,8 +157,7 @@ else
    CFLAGS += -O3
 endif
 
-CFLAGS += -Wall -I. -Ilibretro-common/include -std=gnu99 $(LIBS) \
-          -s EXPORTED_FUNCTIONS="['_main', '_malloc', '_cmd_savefiles', '_cmd_save_state', '_cmd_take_screenshot']"
+CFLAGS += -Wall -Wno-unused-command-line-argument -I. -Ilibretro-common/include -std=gnu99 $(LIBS) -s EXPORTED_FUNCTIONS=$(EXPORTED_FUNCTIONS)
 
 RARCH_OBJ := $(addprefix $(OBJDIR)/,$(OBJ))
 
diff --git a/cheat_manager.c b/cheat_manager.c
index 5df70be982..2f11a8f25a 100644
--- a/cheat_manager.c
+++ b/cheat_manager.c
@@ -120,7 +120,7 @@ void cheat_manager_set_code(unsigned i, const char *str)
       return;
 
    if (!string_is_empty(str))
-      strcpy(cheat_st->cheats[i].code, str);
+      cheat_st->cheats[i].code = strdup(str);
 
    cheat_st->cheats[i].state = true;
 }
diff --git a/command.h b/command.h
index a007c175c7..5d1255dfc5 100644
--- a/command.h
+++ b/command.h
@@ -205,7 +205,8 @@ enum event_command
    CMD_EVENT_CHEAT_INDEX_MINUS,
    CMD_EVENT_CHEAT_TOGGLE,
    CMD_EVENT_AI_SERVICE_CALL,
-   CMD_EVENT_SAVE_FILES
+   CMD_EVENT_SAVE_FILES,
+   CMD_EVENT_RELOAD_CONFIG
 };
 
 typedef struct command command_t;
diff --git a/config.def.h b/config.def.h
index a87fa6f94a..7c0ddac8f7 100644
--- a/config.def.h
+++ b/config.def.h
@@ -1151,6 +1151,9 @@ static const int default_content_favorites_size = 200;
 /* Show Menu start-up screen on boot. */
 #define DEFAULT_MENU_SHOW_START_SCREEN true
 
+/* Working with a limited set of assets */
+#define DEFAULT_MENU_MINIMAL_ASSETS false
+
 /* Default scale factor for non-frambuffer-based display
  * drivers and display widgets */
 #if defined(VITA)
diff --git a/configuration.c b/configuration.c
index fb8e97c196..2afa8f147a 100644
--- a/configuration.c
+++ b/configuration.c
@@ -1654,6 +1654,7 @@ static struct config_bool_setting *populate_settings_bool(
    SETTING_BOOL("menu_show_legacy_thumbnail_updater", &settings->bools.menu_show_legacy_thumbnail_updater, true, menu_show_legacy_thumbnail_updater, false);
    SETTING_BOOL("filter_by_current_core",        &settings->bools.filter_by_current_core, true, DEFAULT_FILTER_BY_CURRENT_CORE, false);
    SETTING_BOOL("rgui_show_start_screen",        &settings->bools.menu_show_start_screen, false, false /* TODO */, false);
+   SETTING_BOOL("menu_minimal_assets",        &settings->bools.menu_minimal_assets, false, false, false);
    SETTING_BOOL("menu_navigation_wraparound_enable", &settings->bools.menu_navigation_wraparound_enable, true, true, false);
    SETTING_BOOL("menu_navigation_browser_filter_supported_extensions_enable",
          &settings->bools.menu_navigation_browser_filter_supported_extensions_enable, true, true, false);
diff --git a/configuration.h b/configuration.h
index d758fe630e..4c20fdb983 100644
--- a/configuration.h
+++ b/configuration.h
@@ -556,6 +556,7 @@ typedef struct settings
       bool notification_show_refresh_rate;
       bool menu_widget_scale_auto;
       bool menu_show_start_screen;
+      bool menu_minimal_assets;
       bool menu_pause_libretro;
       bool menu_savestate_resume;
       bool menu_insert_disk_resume;
diff --git a/dist-scripts/dist-cores.sh b/dist-scripts/dist-cores.sh
index 7beedba2e6..970d648f25 100644
--- a/dist-scripts/dist-cores.sh
+++ b/dist-scripts/dist-cores.sh
@@ -164,6 +164,10 @@ for f in `ls -v *_${platform}.${EXT}`; do
    whole_archive=
    big_stack=
 
+   gles3=0
+   stack_mem=8388608
+   heap_mem=268435456
+
    if [ $name = "nxengine" ] ; then
       echo "Applying whole archive linking..."
       whole_archive="WHOLE_ARCHIVE_LINK=1"
@@ -171,10 +175,31 @@ for f in `ls -v *_${platform}.${EXT}`; do
       echo "Applying big stack..."
       lto=0
       big_stack="BIG_STACK=1"
-   elif [ $name = "mupen64plus" ] ; then
+   elif [ $name = "mupen64plus_next" ] ; then
+      gles3=1
+      async=1
+      pthread=0
+      stack_mem=268435456
+      heap_mem=536870912
+   elif [ $name = "parallel_n64" ] ; then
+      gles3=1
       async=1
+   elif [ $name = "mednafen_psx" ] ; then
+      heap_mem=536870912
+   elif [ $name = "mednafen_psx_hw" ] ; then
+      gles3=1
+      heap_mem=536870912
    elif [ $name = "dosbox" ] ; then
-      async=0
+      async=1
+   elif [ $name = "scummvm" ] ; then
+      async=1
+      pthread=0
+   elif [ $name = "melonds" ] ; then
+      pthread=0
+   elif [ $name = "yabause" ] ; then
+      pthread=0
+   elif [ $name = "yabasanshiro" ] ; then
+      pthread=0
    fi
    echo "-- Building core: $name --"
    if [ $PLATFORM = "unix" ]; then
@@ -184,7 +209,11 @@ for f in `ls -v *_${platform}.${EXT}`; do
    fi
    echo NAME: $name
    echo ASYNC: $async
+   echo PTHREAD: $pthread
    echo LTO: $lto
+   echo GLES3: $gles3
+   echo STACK_MEMORY: $stack_mem
+   echo HEAP_MEMORY: $heap_mem
 
    # Do cleanup if this is a big stack core
    if [ "$big_stack" = "BIG_STACK=1" ] ; then
@@ -203,8 +232,8 @@ for f in `ls -v *_${platform}.${EXT}`; do
    if [ $MAKEFILE_GRIFFIN = "yes" ]; then
       make -C ../ -f Makefile.griffin $OPTS platform=${platform} $whole_archive $big_stack -j3 || exit 1
    elif [ $PLATFORM = "emscripten" ]; then
-       echo "BUILD COMMAND: make -C ../ -f Makefile.emscripten PTHREAD=$pthread ASYNC=$async LTO=$lto -j7 TARGET=${name}_libretro.js"
-       make -C ../ -f Makefile.emscripten $OPTS PTHREAD=$pthread ASYNC=$async LTO=$lto -j7 TARGET=${name}_libretro.js || exit 1
+       echo "BUILD COMMAND: make -C ../ -f Makefile.emscripten $OPTS PTHREAD=$pthread ASYNC=$async LTO=$lto HAVE_OPENGLES3=$gles3 STACK_MEMORY=$stack_mem HEAP_MEMORY=$heap_mem -j7 TARGET=${name}_libretro.js"
+       make -C ../ -f Makefile.emscripten $OPTS PTHREAD=$pthread ASYNC=$async LTO=$lto HAVE_OPENGLES3=$gles3 STACK_MEMORY=$stack_mem HEAP_MEMORY=$heap_mem -j7 TARGET=${name}_libretro.js || exit 1
    elif [ $PLATFORM = "unix" ]; then
       make -C ../ -f Makefile LINK=g++ $whole_archive $big_stack -j3 || exit 1
    elif [ $PLATFORM = "ctr" ]; then
@@ -258,7 +287,7 @@ for f in `ls -v *_${platform}.${EXT}`; do
       mv -f ../${name}_libretro.js ../pkg/emscripten/${name}_libretro.js
       mv -f ../${name}_libretro.wasm ../pkg/emscripten/${name}_libretro.wasm
       if [ $pthread != 0 ] ; then
-         mv -f ../pthread-main.js ../pkg/emscripten/pthread-main.js
+         mv -f ../${name}_libretro.worker.js ../pkg/emscripten/${name}_libretro.worker.js
       fi
    fi
 
diff --git a/emscripten/library_rwebcam.js b/emscripten/library_rwebcam.js
index 5c0bec5dc3..9b9114d33b 100644
--- a/emscripten/library_rwebcam.js
+++ b/emscripten/library_rwebcam.js
@@ -17,18 +17,13 @@ var LibraryRWebCam = {
    RWebCamInit__deps: ['malloc'],
    RWebCamInit: function(caps1, caps2, width, height) {
       if (!navigator) return 0;
-
-      navigator.getMedia = navigator.getUserMedia ||
-                           navigator.webkitGetUserMedia ||
-                           navigator.mozGetUserMedia ||
-                           navigator.msGetUserMedia;
-
-      if (!navigator.getMedia) return 0;
+      if (!navigator.mediaDevices.getUserMedia) return 0;
 
       var c = ++RWC.counter;
 
       RWC.contexts[c] = [];
       RWC.contexts[c].videoElement = document.createElement("video");
+      RWC.contexts[c].videoElement.classList.add("retroarchWebcamVideo");
       if (width !== 0 && height !== 0) {
          RWC.contexts[c].videoElement.width = width;
          RWC.contexts[c].videoElement.height = height;
@@ -37,14 +32,19 @@ var LibraryRWebCam = {
       RWC.contexts[c].glTex = caps1 & (1 << RWC.RETRO_CAMERA_BUFFER_OPENGL_TEXTURE);
       RWC.contexts[c].rawFb = caps1 & (1 << RWC.RETRO_CAMERA_BUFFER_RAW_FRAMEBUFFER);
 
-      navigator.getMedia({video: true, audio: false}, function(stream) {
-         RWC.contexts[c].videoElement.autoplay = true;
-         RWC.contexts[c].videoElement.src = URL.createObjectURL(stream);
-         RWC.contexts[c].runMode = 2;
-      }, function (err) {
-         console.log("webcam request failed", err);
+      if (!window.disableWebCam) {
+         navigator.mediaDevices.getUserMedia({video: true, audio: false}).then(function(stream) {
+            RWC.contexts[c].videoElement.autoplay = true;
+            RWC.contexts[c].videoElement.srcObject = stream;
+            RWC.contexts[c].runMode = 2;
+         }).catch(function (err) {
+            console.log("Webcam request failed", err);
+            RWC.runMode = 0;
+         });
+      } else {
+         console.log("Webcam disabled.");
          RWC.runMode = 0;
-      });
+      }
 
       // for getting/storing texture id in GL mode
       if (!RWC.tmp) RWC.tmp = _malloc(4);
@@ -53,7 +53,6 @@ var LibraryRWebCam = {
 
    RWebCamFree: function(data) {
       RWC.contexts[data].videoElement.pause();
-      URL.revokeObjectURL(RWC.contexts[data].videoElement.src);
       RWC.contexts[data].videoElement = null;
       RWC.contexts[data] = null;
    },
@@ -81,6 +80,7 @@ var LibraryRWebCam = {
       }
       if (RWC.contexts[data].rawFb) {
          RWC.contexts[data].rawFbCanvas = document.createElement("canvas");
+         RWC.contexts[data].rawFbCanvas.classList.add("retroarchWebcamCanvas");
          ret = 1;
       }
 
diff --git a/frontend/drivers/platform_emscripten.c b/frontend/drivers/platform_emscripten.c
index a33cc6bf29..ccd8fe9d80 100644
--- a/frontend/drivers/platform_emscripten.c
+++ b/frontend/drivers/platform_emscripten.c
@@ -46,10 +46,15 @@
 #include "../../tasks/tasks_internal.h"
 #include "../../file_path_special.h"
 #include "../../paths.h"
+#include "../../cheat_manager.h"
 
 void dummyErrnoCodes(void);
 void emscripten_mainloop(void);
 
+//// begin exported functions
+
+// saves and states
+
 void cmd_savefiles(void)
 {
    command_event(CMD_EVENT_SAVE_FILES, NULL);
@@ -65,11 +70,111 @@ void cmd_load_state(void)
    command_event(CMD_EVENT_LOAD_STATE, NULL);
 }
 
+void cmd_undo_save_state(void)
+{
+   command_event(CMD_EVENT_UNDO_SAVE_STATE, NULL);
+}
+
+void cmd_undo_load_state(void)
+{
+   command_event(CMD_EVENT_UNDO_LOAD_STATE, NULL);
+}
+
+// misc
+
 void cmd_take_screenshot(void)
 {
    command_event(CMD_EVENT_TAKE_SCREENSHOT, NULL);
 }
 
+void cmd_toggle_menu(void)
+{
+   command_event(CMD_EVENT_MENU_TOGGLE, NULL);
+}
+
+void cmd_reload_config(void)
+{
+   command_event(CMD_EVENT_RELOAD_CONFIG, NULL);
+}
+
+void cmd_toggle_grab_mouse(void)
+{
+   command_event(CMD_EVENT_GRAB_MOUSE_TOGGLE, NULL);
+}
+
+void cmd_toggle_game_focus(void)
+{
+   command_event(CMD_EVENT_GAME_FOCUS_TOGGLE, NULL);
+}
+
+void cmd_reset(void)
+{
+   command_event(CMD_EVENT_RESET, NULL);
+}
+
+void cmd_toggle_pause(void)
+{
+   command_event(CMD_EVENT_PAUSE_TOGGLE, NULL);
+}
+
+void cmd_pause(void)
+{
+   command_event(CMD_EVENT_PAUSE, NULL);
+}
+
+void cmd_unpause(void)
+{
+   command_event(CMD_EVENT_UNPAUSE, NULL);
+}
+
+void cmd_set_volume(float volume) {
+	// TODO: update retroarch
+}
+
+bool cmd_set_shader(const char *path)
+{
+   return retroarch_set_shader(path);
+}
+
+// cheats
+
+void cmd_cheat_set_code(unsigned index, const char *str)
+{
+	cheat_manager_set_code(index, str);
+}
+
+const char *cmd_cheat_get_code(unsigned index)
+{
+	return cheat_manager_get_code(index);
+}
+
+void cmd_cheat_toggle_index(bool apply_cheats_after_toggle, unsigned index)
+{
+	cheat_manager_toggle_index(apply_cheats_after_toggle, index);
+}
+
+bool cmd_cheat_get_code_state(unsigned index)
+{
+	return cheat_manager_get_code_state(index);
+}
+
+bool cmd_cheat_realloc(unsigned new_size)
+{
+	return cheat_manager_realloc(new_size, CHEAT_HANDLER_TYPE_EMU);
+}
+
+unsigned cmd_cheat_get_size(void)
+{
+	return cheat_manager_get_size();
+}
+
+void cmd_cheat_apply_cheats(void)
+{
+	cheat_manager_apply_cheats();
+}
+
+//// end exported functions
+
 static void frontend_emscripten_get_env(int *argc, char *argv[],
       void *args, void *params_data)
 {
@@ -164,9 +269,10 @@ static void frontend_emscripten_get_env(int *argc, char *argv[],
 int main(int argc, char *argv[])
 {
    dummyErrnoCodes();
-
+#ifndef NO_INITIAL_CANVAS_RESIZE
    emscripten_set_canvas_element_size("#canvas", 800, 600);
    emscripten_set_element_css_size("#canvas", 800.0, 600.0);
+#endif
    emscripten_set_main_loop(emscripten_mainloop, 0, 0);
    rarch_main(argc, argv, NULL);
 
diff --git a/gfx/drivers_context/emscriptenegl_ctx.c b/gfx/drivers_context/emscriptenegl_ctx.c
index b78d5e296d..8ee63f458e 100644
--- a/gfx/drivers_context/emscriptenegl_ctx.c
+++ b/gfx/drivers_context/emscriptenegl_ctx.c
@@ -51,7 +51,7 @@ typedef struct
 static void gfx_ctx_emscripten_swap_interval(void *data, int interval)
 {
    if (interval == 0)
-      emscripten_set_main_loop_timing(EM_TIMING_SETIMMEDIATE, 0);
+      emscripten_set_main_loop_timing(EM_TIMING_RAF, 1);
    else
       emscripten_set_main_loop_timing(EM_TIMING_RAF, interval);
 }
@@ -62,6 +62,7 @@ static void gfx_ctx_emscripten_get_canvas_size(int *width, int *height)
    bool  is_fullscreen = false;
    EMSCRIPTEN_RESULT r = emscripten_get_fullscreen_status(&fullscreen_status);
 
+#ifndef NO_CANVAS_FULLSCREEN
    if (r == EMSCRIPTEN_RESULT_SUCCESS)
    {
       if (fullscreen_status.isFullscreen)
@@ -71,6 +72,7 @@ static void gfx_ctx_emscripten_get_canvas_size(int *width, int *height)
          *height = fullscreen_status.screenHeight;
       }
    }
+#endif
 
    if (!is_fullscreen)
    {
@@ -89,7 +91,6 @@ static void gfx_ctx_emscripten_get_canvas_size(int *width, int *height)
 static void gfx_ctx_emscripten_check_window(void *data, bool *quit,
       bool *resize, unsigned *width, unsigned *height)
 {
-   EMSCRIPTEN_RESULT r;
    int input_width;
    int input_height;
    emscripten_ctx_data_t *emscripten = (emscripten_ctx_data_t*)data;
@@ -106,10 +107,12 @@ static void gfx_ctx_emscripten_check_window(void *data, bool *quit,
    *width      = (unsigned)input_width;
    *height     = (unsigned)input_height;
    *resize     = false;
-
+#ifndef NO_AUTO_CANVAS_RESIZE
    if (input_width != emscripten->fb_width ||
       input_height != emscripten->fb_height)
    {
+      EMSCRIPTEN_RESULT r;
+
       r = emscripten_set_canvas_element_size("#canvas",
          input_width, input_height);
 
@@ -125,9 +128,16 @@ static void gfx_ctx_emscripten_check_window(void *data, bool *quit,
 
       *resize  = true;
    }
+#endif
 
+#ifdef WEB_SCALING
+   double dpr = emscripten_get_device_pixel_ratio();
+   emscripten->fb_width  = (unsigned)(input_width * dpr);
+   emscripten->fb_height = (unsigned)(input_height * dpr);
+#else
    emscripten->fb_width  = (unsigned)input_width;
    emscripten->fb_height = (unsigned)input_height;
+#endif
    *quit       = false;
 }
 
diff --git a/input/drivers/rwebinput_input.c b/input/drivers/rwebinput_input.c
index be4b631bde..94b2e1c67b 100644
--- a/input/drivers/rwebinput_input.c
+++ b/input/drivers/rwebinput_input.c
@@ -24,6 +24,9 @@
 #include <encodings/crc32.h>
 #include <encodings/utf.h>
 
+#ifdef WEB_SCALING
+#include <emscripten/emscripten.h>
+#endif
 #include <emscripten/html5.h>
 
 #include "../input_keymaps.h"
@@ -265,10 +268,18 @@ static EM_BOOL rwebinput_mouse_cb(int event_type,
 
    uint8_t mask                      = 1 << mouse_event->button;
 
+#ifdef WEB_SCALING
+   double dpr = emscripten_get_device_pixel_ratio();
+   rwebinput->mouse.x                = (long)(mouse_event->targetX * dpr);
+   rwebinput->mouse.y                = (long)(mouse_event->targetY * dpr);
+   rwebinput->mouse.pending_delta_x += (long)(mouse_event->movementX * dpr);
+   rwebinput->mouse.pending_delta_y += (long)(mouse_event->movementY * dpr);
+#else
    rwebinput->mouse.x                = mouse_event->targetX;
    rwebinput->mouse.y                = mouse_event->targetY;
    rwebinput->mouse.pending_delta_x += mouse_event->movementX;
    rwebinput->mouse.pending_delta_y += mouse_event->movementY;
+#endif
 
    if (event_type ==  EMSCRIPTEN_EVENT_MOUSEDOWN)
       rwebinput->mouse.buttons |= mask;
@@ -283,8 +294,26 @@ static EM_BOOL rwebinput_wheel_cb(int event_type,
 {
    rwebinput_input_t       *rwebinput = (rwebinput_input_t*)user_data;
 
+#ifdef WEB_SCALING
+   double dpr = emscripten_get_device_pixel_ratio();
+   rwebinput->mouse.pending_scroll_x += wheel_event->deltaX * dpr;
+   rwebinput->mouse.pending_scroll_y += wheel_event->deltaY * dpr;
+#else
    rwebinput->mouse.pending_scroll_x += wheel_event->deltaX;
    rwebinput->mouse.pending_scroll_y += wheel_event->deltaY;
+#endif
+
+   return EM_TRUE;
+}
+
+static EM_BOOL rwebinput_pointerlockchange_cb(int event_type,
+   const EmscriptenPointerlockChangeEvent *pointerlock_change_event, void *user_data)
+{
+   if (!pointerlock_change_event->isActive)
+   {
+      retroarch_game_focus_off();
+      retroarch_grab_mouse_off();
+   }
 
    return EM_TRUE;
 }
@@ -360,6 +389,15 @@ static void *rwebinput_input_init(const char *joypad_driver)
          "[EMSCRIPTEN/INPUT] failed to create wheel callback: %d\n", r);
    }
 
+   r = emscripten_set_pointerlockchange_callback(
+         EMSCRIPTEN_EVENT_TARGET_DOCUMENT, rwebinput, false,
+         rwebinput_pointerlockchange_cb);
+   if (r != EMSCRIPTEN_RESULT_SUCCESS)
+   {
+      RARCH_ERR(
+         "[EMSCRIPTEN/INPUT] failed to create pointerlockchange callback: %d\n", r);
+   }
+
    input_keymaps_init_keyboard_lut(rarch_key_map_rwebinput);
 
    return rwebinput;
@@ -537,7 +575,7 @@ static int16_t rwebinput_input_state(
             vp.full_height              = 0;
 
             if (!(video_driver_translate_coord_viewport_wrap(
-                        &vp, mouse->x, mouse->x,
+                        &vp, mouse->x, mouse->y,
                         &res_x, &res_y, &res_screen_x, &res_screen_y)))
                return 0;
 
@@ -628,8 +666,10 @@ static void rwebinput_process_keyboard_events(
       character = '\t';
 
    if (translated_keycode != RETROK_UNKNOWN)
+   {
       input_keyboard_event(keydown, translated_keycode, character, mod,
          RETRO_DEVICE_KEYBOARD);
+   }
    
    if (     translated_keycode  < RETROK_LAST 
          && translated_keycode != RETROK_UNKNOWN)
diff --git a/menu/drivers/materialui.c b/menu/drivers/materialui.c
index e591cebd0e..d71581fab9 100644
--- a/menu/drivers/materialui.c
+++ b/menu/drivers/materialui.c
@@ -2294,10 +2294,12 @@ static void materialui_context_reset_textures(materialui_handle_t *mui)
    }
 
    /* Warn user if assets are missing */
+#ifndef NO_MISSING_ASSET_WARNING
    if (!has_all_assets)
       runloop_msg_queue_push(
             msg_hash_to_str(MSG_MISSING_ASSETS), 1, 256, false, NULL,
             MESSAGE_QUEUE_ICON_DEFAULT, MESSAGE_QUEUE_CATEGORY_INFO);
+#endif
 }
 
 static void materialui_draw_icon(
diff --git a/menu/drivers/ozone/ozone.c b/menu/drivers/ozone/ozone.c
index 90b814ed3d..9bd20f4f0b 100644
--- a/menu/drivers/ozone/ozone.c
+++ b/menu/drivers/ozone/ozone.c
@@ -743,6 +743,8 @@ static void *ozone_init(void **userdata, bool video_is_threaded)
    ozone->animations.left_thumbnail_alpha       = 1.0f;
    ozone->force_metadata_display                = false;
 
+   ozone->minimal_assets = settings->bools.menu_minimal_assets;
+
    gfx_thumbnail_set_stream_delay(-1.0f);
    gfx_thumbnail_set_fade_duration(-1.0f);
    gfx_thumbnail_set_fade_missing(false);
@@ -1244,7 +1246,7 @@ static void ozone_context_reset(void *data, bool is_threaded)
          else
          {
 #endif
-            if (!gfx_display_reset_textures_list(filename, ozone->png_path, &ozone->textures[i], TEXTURE_FILTER_MIPMAP_LINEAR, NULL, NULL))
+            if (!gfx_display_reset_textures_list(filename, ozone->png_path, &ozone->textures[i], TEXTURE_FILTER_MIPMAP_LINEAR, NULL, NULL) && !ozone->minimal_assets)
                ozone->has_all_assets = false;
 #if 0
          }
@@ -1263,14 +1265,15 @@ static void ozone_context_reset(void *data, bool is_threaded)
 
          if (!gfx_display_reset_textures_list(filename, ozone->tab_path, &ozone->tab_textures[i], TEXTURE_FILTER_MIPMAP_LINEAR, NULL, NULL))
          {
-            ozone->has_all_assets = false;
+            if (!ozone->minimal_assets)
+               ozone->has_all_assets = false;
             RARCH_WARN("[OZONE] Asset missing: %s%s%s\n", ozone->tab_path,
                   PATH_DEFAULT_SLASH(), filename);
          }
       }
 
       /* Theme textures */
-      if (!ozone_reset_theme_textures(ozone))
+      if (!ozone_reset_theme_textures(ozone) && !ozone->minimal_assets)
          ozone->has_all_assets = false;
 
       /* Icons textures init */
@@ -1278,7 +1281,8 @@ static void ozone_context_reset(void *data, bool is_threaded)
       {
          if (!gfx_display_reset_textures_list(ozone_entries_icon_texture_path(i), ozone->icons_path, &ozone->icons_textures[i], TEXTURE_FILTER_MIPMAP_LINEAR, NULL, NULL))
          {
-            ozone->has_all_assets = false;
+            if (!ozone->minimal_assets)
+               ozone->has_all_assets = false;
             RARCH_WARN("[OZONE] Asset missing: %s%s%s\n", ozone->icons_path,
                   PATH_DEFAULT_SLASH(), ozone_entries_icon_texture_path(i));
          }
@@ -1307,8 +1311,10 @@ static void ozone_context_reset(void *data, bool is_threaded)
       ozone->animations.list_alpha     = 1.0f;
 
       /* Missing assets message */
+#ifndef NO_MISSING_ASSET_WARNING
       if (!ozone->has_all_assets)
          runloop_msg_queue_push(msg_hash_to_str(MSG_MISSING_ASSETS), 1, 256, false, NULL, MESSAGE_QUEUE_ICON_DEFAULT, MESSAGE_QUEUE_CATEGORY_INFO);
+#endif
 
       /* Thumbnails */
       ozone_update_thumbnail_image(ozone);
diff --git a/menu/drivers/ozone/ozone.h b/menu/drivers/ozone/ozone.h
index 578c26ce1a..2bfd33bf73 100644
--- a/menu/drivers/ozone/ozone.h
+++ b/menu/drivers/ozone/ozone.h
@@ -292,6 +292,8 @@ struct ozone_handle
 
    bool force_metadata_display;
 
+   bool minimal_assets;
+
    bool is_db_manager_list;
    bool is_file_list;
    bool is_quick_menu;
diff --git a/menu/drivers/xmb.c b/menu/drivers/xmb.c
index a5da529592..4e020e6a7c 100644
--- a/menu/drivers/xmb.c
+++ b/menu/drivers/xmb.c
@@ -6050,7 +6050,9 @@ static void xmb_context_reset_textures(
                   && !(settings->uints.menu_xmb_theme == XMB_ICON_THEME_CUSTOM)
                )
             {
+#ifndef NO_MISSING_ASSET_WARNING
                runloop_msg_queue_push(msg_hash_to_str(MSG_MISSING_ASSETS), 1, 256, false, NULL, MESSAGE_QUEUE_ICON_DEFAULT, MESSAGE_QUEUE_CATEGORY_INFO);
+#endif
                /* Do not draw icons if subsetting is missing */
                goto error;
             }
diff --git a/retroarch.c b/retroarch.c
index 9d3add82cd..4c0a3b494a 100644
--- a/retroarch.c
+++ b/retroarch.c
@@ -11077,6 +11077,10 @@ static bool command_set_shader(const char *arg)
 
    return retroarch_apply_shader(type, arg, true);
 }
+
+bool retroarch_set_shader(const char *path) {
+	return command_set_shader(path);
+}
 #endif
 
 /* TRANSLATION */
@@ -13395,6 +13399,14 @@ static bool input_driver_ungrab_mouse(struct rarch_state *p_rarch)
    return true;
 }
 
+void retroarch_grab_mouse_off(void)
+{
+   struct rarch_state *p_rarch = &rarch_st;
+
+   if (p_rarch->input_driver_grab_mouse_state)
+      command_event(CMD_EVENT_GRAB_MOUSE_TOGGLE, NULL);
+}
+
 static void command_event_reinit(struct rarch_state *p_rarch,
       const int flags)
 {
@@ -13507,6 +13519,17 @@ static void retroarch_game_focus_free(struct rarch_state *p_rarch)
    p_rarch->game_focus_state.core_requested = false;
 }
 
+void retroarch_game_focus_off(void)
+{
+   struct rarch_state *p_rarch = &rarch_st;
+
+   if (p_rarch->game_focus_state.enabled)
+   {
+      enum input_game_focus_cmd_type game_focus_cmd = GAME_FOCUS_CMD_OFF;
+      command_event(CMD_EVENT_GAME_FOCUS_TOGGLE, &game_focus_cmd);
+   }
+}
+
 static void retroarch_system_info_free(struct rarch_state *p_rarch)
 {
    rarch_system_info_t        *sys_info   = &p_rarch->runloop_system;
@@ -13576,6 +13599,9 @@ bool command_event(enum event_command cmd, void *data)
 
    switch (cmd)
    {
+      case CMD_EVENT_RELOAD_CONFIG:
+         config_load(&p_rarch->g_extern);
+         break;
       case CMD_EVENT_SAVE_FILES:
          event_save_files(p_rarch->rarch_use_sram);
          break;
@@ -16639,9 +16665,14 @@ static bool dynamic_request_hw_context(enum retro_hw_context_type type,
 #endif
       case RETRO_HW_CONTEXT_OPENGL:
       case RETRO_HW_CONTEXT_OPENGL_CORE:
+#ifdef HAVE_REGAL
+         RARCH_LOG("Requesting OpenGL context (Regal).\n");
+         break;
+#else
          RARCH_ERR("Requesting OpenGL context, but RetroArch "
                "is compiled against OpenGLES. Cannot use HW context.\n");
          return false;
+#endif
 
 #elif defined(HAVE_OPENGL) || defined(HAVE_OPENGL_CORE)
       case RETRO_HW_CONTEXT_OPENGLES2:
diff --git a/retroarch.h b/retroarch.h
index 5e8e7a513f..ff0a1dc3db 100644
--- a/retroarch.h
+++ b/retroarch.h
@@ -396,6 +396,14 @@ void rarch_favorites_init(void);
 
 void rarch_favorites_deinit(void);
 
+void retroarch_grab_mouse_off(void);
+
+void retroarch_game_focus_off(void);
+
+#if defined(HAVE_CG) || defined(HAVE_GLSL) || defined(HAVE_SLANG) || defined(HAVE_HLSL)
+bool retroarch_set_shader(const char *path);
+#endif
+
 /* Audio */
 
 #ifdef HAVE_AUDIOMIXER