Remove Allegro backend

CMakeLists.txt

@@ -33,19 +33,11 @@ option(WITH_DEPRECATED_GLIB_SUPPORT "Enable support for older glib versions" off
 option(WITH_DESKTOP_INTEGRATION     "Enable desktop integration modules" off)
 option(WITH_QT_THUMBNAILER          "Enable kde5/qt5 thumnailer" off)
 
-option(USE_SHARED_ALLEGRO4 "Use shared Allegro 4 library (without resize support)" off)
 option(ENABLE_MEMLEAK     "Enable memory-leaks detector (only for developers)" off)
 option(ENABLE_TESTS       "Enable the unit tests" off)
 option(FULLSCREEN_PLATFORM "Enable fullscreen by default" off)
 
-if(APPLE)
-  # On OS X Allegro isn't supported anymore
-  set(USE_ALLEG4_BACKEND off)
-  option(USE_SDL2_BACKEND "Use SDL2 backend" on)
-else()
-  option(USE_ALLEG4_BACKEND "Use Allegro 4 backend" off)
-  option(USE_SDL2_BACKEND "Use SDL2 backend" on)
-endif()
+option(USE_SDL2_BACKEND "Use SDL2 backend" on)
 
 ######################################################################
 # Profile build type
@@ -141,6 +133,12 @@ if(APPLE)
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -stdlib=libc++")
 endif()
 
+# tinyxml2
+find_library(TINYXML2_LIBRARY NAMES tinyxml2)
+find_path(TINYXML2_INCLUDE_DIR NAMES tinyxml2.h)
+include_directories(${TINYXML2_INCLUDE_DIR})
+
+if(NOT GEN_ONLY)
 # zlib
 find_package(ZLIB REQUIRED)
 include_directories(${ZLIB_INCLUDE_DIRS})
@@ -170,11 +168,6 @@ if(WITH_WEBP_SUPPORT)
   include_directories(${WEBP_INCLUDE_DIR})
 endif()
 
-# tinyxml2
-find_library(TINYXML2_LIBRARY NAMES tinyxml2)
-find_path(TINYXML2_INCLUDE_DIR NAMES tinyxml2.h)
-include_directories(${TINYXML2_INCLUDE_DIR})
-
 # pixman
 find_library(PIXMAN_LIBRARY NAMES pixman pixman-1)
 find_path(PIXMAN_INCLUDE_DIR NAMES pixman.h PATH_SUFFIXES pixman-1)
@@ -240,15 +233,10 @@ else()
   message(STATUS "Optional V8 library NOT found. Disabling V8 scripting engine.")
 endif()
 
-if(USE_ALLEG4_BACKEND)
-  set(LOADPNG_LIBRARY loadpng)
-  set(LOADPNG_INCLUDE_DIR ${LOADPNG_DIR})
-  include_directories(${LOADPNG_INCLUDE_DIR})
-endif()
 
 find_package(CURL REQUIRED)
 include_directories(${CURL_INCLUDE_DIRS})
-
+endif()
 # simpleini
 include_directories(${SIMPLEINI_DIR})
 
@@ -257,41 +245,6 @@ include_directories(${SIMPLEINI_DIR})
 
 set(PLATFORM_LIBS)
 
-# Allegro 4 backend
-if(USE_ALLEG4_BACKEND)
-  add_definitions(-DUSE_ALLEG4_BACKEND)
-  add_definitions(-DALLEGRO_NO_FIX_ALIASES)
-
-  if(USE_SHARED_ALLEGRO4)
-    # Find the shared Allegro 4 library
-    find_library(LIBALLEGRO4_LIBRARY alleg)
-    find_path(LIBALLEGRO4_INCLUDE_DIR allegro.h)
-
-    if(NOT LIBALLEGRO4_LIBRARY)
-      message(FATAL_ERROR "Allegro 4 not found")
-    endif()
-
-    # Get flags to link programs using allegro-config program
-    execute_process(COMMAND allegro-config --libs --shared
-      OUTPUT_VARIABLE LIBALLEGRO4_LINK_FLAGS
-      OUTPUT_STRIP_TRAILING_WHITESPACE)
-
-    set(LIBALLEGRO4_LINK_FLAGS ${LIBALLEGRO4_LINK_FLAGS} ${PLATFORM_LIBS})
-    include_directories(${LIBALLEGRO4_INCLUDE_DIR})
-  else()
-    include_directories(${CMAKE_SOURCE_DIR}/src/allegro/include)
-    include_directories(${CMAKE_BINARY_DIR}/include)
-
-    add_definitions(-DALLEGRO4_WITH_RESIZE_PATCH)
-    add_definitions(-DALLEGRO4_WITH_EXTRA_CURSORS)
-
-    # Static Allegro (the code of Allegro library is embedded).
-    add_definitions(-DALLEGRO_STATICLINK)
-
-    set(LIBALLEGRO4_LINK_FLAGS allegro)
-  endif()
-endif()
-
 # SDL2 backend
 if(USE_SDL2_BACKEND)
   add_definitions(-DUSE_SDL2_BACKEND)
@@ -304,7 +257,7 @@ endif()
 
 # -- Unix --
 
-if(UNIX AND NOT APPLE AND NOT BEOS)
+if(UNIX AND NOT APPLE AND NOT BEOS AND NOT GEN_ONLY)
   # Pthreads
   find_package(Threads REQUIRED)
   list(APPEND PLATFORM_LIBS m ${CMAKE_THREAD_LIBS_INIT})

CONTRIBUTORS.md

@@ -12,7 +12,6 @@ It tries to replicate some pixel-art algorithms:
 
 And it uses the following third-party libraries:
 
-* [allegro 4.4](https://liballeg.org) (Giftware)
 * [curl](http://curl.haxx.se/) (curl)
 * [duktape](https://duktape.org) (MIT)
 * [freetype](https://www.freetype.org) (FTL)

INSTALL.md

@@ -46,13 +46,6 @@ To update an existing clone, use the following commands:
     git pull
     git submodule update --init --recursive
 
-## Backends
-
-LibreSprite can be compiled with two different backends:
-
-1. SDL2 backend (WIP)
-2. Allegro backend (deprecated) (Windows and Linux only)
-
 ## Dependencies
 
 You'll need the following dependencies to compile LibreSprite:
@@ -101,16 +94,6 @@ To compile LibreSprite, run the following commands:
     cmake -G Ninja ..
     ninja libresprite
 
-To compile the legacy Allegro backend, run `cmake` with the flags
-`-DUSE_SDL2_BACKEND=off -DUSE_ALLEG4_BACKEND=on`.
-
-The repository contains a patched version of the Allegro 4 library.
-If you want to use your installed version of Allegro, run `cmake` with
-the flag `-DUSE_SHARED_ALLEGRO4=ON`. However, this is not recommended due to
-issues with Allegro 4.4
-[(1)](https://github.com/aseprite/aseprite/issues/192)
-[(2)](https://github.com/LibreSprite/LibreSprite/commit/27b55030e26e93c5e8d9e7e21206c8709d46ff22).
-
 ### Windows details
 
 Run the following in mingw32.exe: