Allow make install under FreeDesktop

FreeDesktop/sameboy.desktop

@@ -0,0 +1,12 @@
+[Desktop Entry]
+Version=1.0
+Type=Application
+Icon=sameboy
+Exec=sameboy
+Name=SameBoy
+Comment=Game Boy and Game Boy Color emulator
+Keywords=game;boy;gameboy;color;emulator
+Terminal=false
+StartupNotify=false
+Categories=Application;Game;
+MimeType=application/x-gameboy-rom;application/x-gameboy-color-rom

Makefile

@@ -30,6 +30,14 @@ else
 DEFAULT := sdl
 endif
 
+ifneq ($(shell which xdg-open),)
+# Running on an FreeDesktop environment, configure for (optional) installation
+DESTDIR ?= 
+PREFIX ?= /usr/local
+DATA_DIR ?= $(PREFIX)/share/sameboy/
+CAN_INSTALL := true
+endif
+
 default: $(DEFAULT)
 
 ifeq ($(MAKECMDGOALS),)
@@ -421,6 +429,33 @@ $(BIN)/BootROMs/%.bin: BootROMs/%.asm $(OBJ)/BootROMs/SameBoyLogo.pb12
 libretro:
 	CFLAGS="$(WARNINGS)" $(MAKE) -C libretro
 
+# install for Linux/FreeDesktop/etc.
+# Does not install mimetype icons because FreeDesktop is cursed abomination with no right to exist.
+# If you somehow find a reasonable way to make associate an icon with an extension in this dumpster
+# fire of a desktop environment, open an issue or a pull request
+ifneq ($(CAN_INSTALL),)
+ICON_NAMES := apps/sameboy
+ICON_SIZES := 16x16 32x32 64x64 128x128 256x256 512x512
+ICONS := $(foreach name,$(ICON_NAMES), $(foreach size,$(ICON_SIZES),$(DESTDIR)$(PREFIX)/share/icons/hicolor/$(size)/$(name).png))
+install: sdl $(DESTDIR)$(PREFIX)/share/applications/sameboy.desktop $(ICONS)(PREFIX)/share/mime/application/x-gameboy-color-rom.xml
+	mkdir -p $(DESTDIR)$(PREFIX)/share/sameboy/
+	cp -rf $(BIN)/SDL/* $(DESTDIR)$(PREFIX)/share/sameboy/
+	mv $(DESTDIR)$(PREFIX)/share/sameboy/sameboy $(DESTDIR)$(PREFIX)/bin/sameboy
+ifeq ($(DESTDIR),)
+	-xdg-icon-resource forceupdate --mode system
+	-xdg-desktop-menu forceupdate --mode system
+endif
+
+$(DESTDIR)$(PREFIX)/share/icons/hicolor/%/apps/sameboy.png: FreeDesktop/AppIcon/%.png
+	-@$(MKDIR) -p $(dir $@)
+	cp -f $^ $@
+	
+    
+$(DESTDIR)$(PREFIX)/share/applications/sameboy.desktop: FreeDesktop/sameboy.desktop
+	-@$(MKDIR) -p $(dir $@)
+	cp -f $^ $@
+endif
+
 # Clean
 clean:
 	rm -rf build

SDL/utils.c

@@ -1,13 +1,11 @@
 #include <SDL.h>
 #include <stdio.h>
 #include <string.h>
+#include <unistd.h>
 #include "utils.h"
 
-const char *resource_folder(void)
+static const char *resource_folder(void)
 {
-#ifdef DATA_DIR
-    return DATA_DIR;
-#else
     static const char *ret = NULL;
     if (!ret) {
         ret = SDL_GetBasePath();
@@ -16,13 +14,19 @@ const char *resource_folder(void)
         }
     }
     return ret;
-#endif
 }
 
 char *resource_path(const char *filename)
 {
     static char path[1024];
+   
     snprintf(path, sizeof(path), "%s%s", resource_folder(), filename);
+#ifdef DATA_DIR
+    if (access(path, F_OK) == 0) {
+        return path;
+    }
+    snprintf(path, sizeof(path), "%s%s", DATA_DIR, filename);
+#endif
     return path;
 }
 

SDL/utils.h

@@ -2,7 +2,6 @@
 #define utils_h
 #include <stddef.h>
 
-const char *resource_folder(void);
 char *resource_path(const char *filename);
 void replace_extension(const char *src, size_t length, char *dest, const char *ext);