From ae83459948e9af720a33ee476c775a226bd8e882 Mon Sep 17 00:00:00 2001
From: Timotej Lazar <timotej.lazar@araneo.si>
Date: Tue, 27 Dec 2022 21:45:05 +0100
Subject: [PATCH] Only build with GLES when requested

---
 CMakeLists.txt | 76 ++++++++++----------------------------------------
 1 file changed, 15 insertions(+), 61 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7b2d35c..828586d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -49,11 +49,9 @@ IF(NOT AVP_WEB)
     pkg_check_modules(LIBAVUTIL REQUIRED libavutil)
     pkg_check_modules(LIBSWSCALE REQUIRED libswscale)
     pkg_check_modules(OPENAL REQUIRED openal)
-    pkg_check_modules(EGL egl)
-    pkg_check_modules(OPENGL gl)
-    pkg_check_modules(OPENGLES2 glesv2)
 
     option(USE_SDL1 "Use SDL 1.2 instead of SDL 2")
+    option(USE_GLES2 "Use OpenGLES 2 instead of OpenGL")
 
     IF(USE_SDL1)
         pkg_check_modules(SDL REQUIRED sdl>=1.2)
@@ -61,49 +59,16 @@ IF(NOT AVP_WEB)
         pkg_check_modules(SDL2 REQUIRED sdl2)
     ENDIF()
 
-    # Use Desktop OpenGL if it is available, else try OpenGL ES 2.0.
-    IF(NOT OPENGL_TYPE)
-        SET(OPENGL_TYPE AUTO CACHE STRING "OpenGL Version; one of: AUTO OPENGL OPENGLES2")
-        SET_PROPERTY(CACHE OPENGL_TYPE PROPERTY STRINGS "AUTO" "OPENGL" "OPENGLES2")
-    ENDIF(NOT OPENGL_TYPE)
-
-    IF(NOT OPENGL_TYPE STREQUAL "AUTO" AND NOT OPENGL_TYPE STREQUAL "OPENGL" AND NOT OPENGL_TYPE STREQUAL "OPENGLES2")
-        MESSAGE(FATAL_ERROR "Invalid OPENGL_TYPE setting ${OPENGL_TYPE}; must be one of AUTO OPENGL OPENGLES2")
-    ENDIF(NOT OPENGL_TYPE STREQUAL "AUTO" AND NOT OPENGL_TYPE STREQUAL "OPENGL" AND NOT OPENGL_TYPE STREQUAL "OPENGLES2")
-
-    IF(OPENGL_TYPE STREQUAL "AUTO")
-        IF(OPENGL_FOUND)
-            MESSAGE(STATUS "OpenGL found; using that.")
-            SET(OPENGL_TYPE "OPENGL")
-        ENDIF(OPENGL_FOUND)
-    ENDIF(OPENGL_TYPE STREQUAL "AUTO")
-
-    IF(OPENGL_TYPE STREQUAL "AUTO")
-        IF(OPENGLES2_FOUND)
-            MESSAGE(STATUS "OpenGL ES 2.0 found; using that.")
-            SET(OPENGL_TYPE "OPENGLES2")
-        ENDIF(OPENGLES2_FOUND)
-    ENDIF(OPENGL_TYPE STREQUAL "AUTO")
-
-    IF(OPENGL_TYPE STREQUAL "AUTO")
-        MESSAGE(FATAL_ERROR "OpenGL is required but CMake couldn't find it.")
-    ENDIF(OPENGL_TYPE STREQUAL "AUTO")
-
-    IF(OPENGL_TYPE STREQUAL "OPENGL")
-        IF(NOT OPENGL_FOUND)
-            MESAGE(FATAL_ERROR "OpenGL was requested but CMake couldn't find it.")
-        ENDIF(NOT OPENGL_FOUND)
-    ENDIF(OPENGL_TYPE STREQUAL "OPENGL")
-
-    IF(OPENGL_TYPE STREQUAL "OPENGLES2")
-        IF(NOT OPENGLES2_FOUND)
-            MESSAGE(FATAL_ERROR "OpenGL ES 2.0 was requested but CMake couldn't find it.")
-        ENDIF(NOT OPENGLES2_FOUND)
+    IF(USE_GLES2)
         IF(USE_SDL1)
             MESSAGE(FATAL_ERROR "OpenGL ES 2.0 support requires SDL2.")
         ENDIF()
-    ENDIF(OPENGL_TYPE STREQUAL "OPENGLES2")
-ENDIF(NOT AVP_WEB)
+        pkg_check_modules(EGL REQUIRED egl)
+        pkg_check_modules(OPENGLES2 REQUIRED glesv2)
+    ELSE()
+        pkg_check_modules(OPENGL REQUIRED gl)
+    ENDIF()
+ENDIF()
 
 # required source files
 LIST(APPEND source src/bink.c)
@@ -387,15 +352,16 @@ IF(NOT AVP_WEB)
         TARGET_LINK_LIBRARIES(avp ${SDL2_LIBRARIES})
     ENDIF()
 
-    IF(OPENGL_TYPE STREQUAL "OPENGL")
-        INCLUDE_DIRECTORIES(${OPENGL_INCLUDE_DIRS})
-    ENDIF(OPENGL_TYPE STREQUAL "OPENGL")
-
-    IF(OPENGL_TYPE STREQUAL "OPENGLES2")
+    IF(USE_GLES2)
         ADD_DEFINITIONS(-DUSE_OPENGL_ES=1)
         INCLUDE_DIRECTORIES(${OPENGLES2_INCLUDE_DIRS})
         INCLUDE_DIRECTORIES(${EGL_INCLUDE_DIRS})
-    ENDIF(OPENGL_TYPE STREQUAL "OPENGLES2")
+        TARGET_LINK_LIBRARIES(avp ${OPENGLES2_LIBRARIES})
+        TARGET_LINK_LIBRARIES(avp ${EGL_LIBRARIES})
+    ELSE()
+        INCLUDE_DIRECTORIES(${OPENGL_INCLUDE_DIRS})
+        TARGET_LINK_LIBRARIES(avp ${OPENGL_LIBRARIES})
+    ENDIF()
 
     INCLUDE_DIRECTORIES(${LIBAVCODEC_INCLUDE_DIRS})
     INCLUDE_DIRECTORIES(${LIBAVFORMAT_INCLUDE_DIRS})
@@ -403,21 +369,9 @@ IF(NOT AVP_WEB)
     INCLUDE_DIRECTORIES(${LIBSWSCALE_INCLUDE_DIRS})
     INCLUDE_DIRECTORIES(${OPENAL_INCLUDE_DIRS})
 
-    IF(OPENGL_TYPE STREQUAL "OPENGL")
-        TARGET_LINK_LIBRARIES(avp ${OPENGL_LIBRARIES})
-    ENDIF(OPENGL_TYPE STREQUAL "OPENGL")
-
-    IF(OPENGL_TYPE STREQUAL "OPENGLES2")
-        TARGET_LINK_LIBRARIES(avp ${OPENGLES2_LIBRARIES})
-        TARGET_LINK_LIBRARIES(avp ${EGL_LIBRARIES})
-    ENDIF(OPENGL_TYPE STREQUAL "OPENGLES2")
-
     TARGET_LINK_LIBRARIES(avp ${LIBAVCODEC_LIBRARIES})
     TARGET_LINK_LIBRARIES(avp ${LIBAVFORMAT_LIBRARIES})
     TARGET_LINK_LIBRARIES(avp ${LIBAVUTIL_LIBRARIES})
     TARGET_LINK_LIBRARIES(avp ${LIBSWSCALE_LIBRARIES})
     TARGET_LINK_LIBRARIES(avp ${OPENAL_LIBRARIES})
-
-
-
 ENDIF(NOT AVP_WEB)