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offscreen: Add new video driver backend Offscreen

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The Offscreen video driver is intended to be used for headless rendering
  as well as allows for multiple GPUs to be used for headless rendering

Currently only supports EGL (OpenGL / ES) or Framebuffers
Adds a hint to specifiy which EGL device to use: SDL_HINT_EGL_DEVICE
Adds testoffscreen.c which can be used to test the backend out
Disabled by default for now
This commit is contained in:
Brandon Schaefer
2019-09-24 16:36:48 -04:00
parent 3d55a51482
commit 68985371a0
18 changed files with 1018 additions and 7 deletions
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8
CMakeLists.txt
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@@ -381,6 +381,7 @@ dep_option(VIDEO_VULKAN "Enable Vulkan support" ON "ANDROID OR APPLE OR L
set_option(VIDEO_METAL "Enable Metal support" ${APPLE})
set_option(VIDEO_KMSDRM "Use KMS DRM video driver" ${UNIX_SYS})
dep_option(KMSDRM_SHARED "Dynamically load KMS DRM support" ON "VIDEO_KMSDRM" OFF)
set_option(VIDEO_OFFSCREEN "Use offscreen video driver" OFF)
option_string(BACKGROUNDING_SIGNAL "number to use for magic backgrounding signal or 'OFF'" "OFF")
option_string(FOREGROUNDING_SIGNAL "number to use for magic foregrounding signal or 'OFF'" "OFF")
set_option(HIDAPI "Use HIDAPI for low level joystick drivers" ${OPT_DEF_HIDAPI})
@@ -852,6 +853,13 @@ if(SDL_VIDEO)
set(HAVE_VIDEO_DUMMY TRUE)
set(HAVE_SDL_VIDEO TRUE)
endif()
if(VIDEO_OFFSCREEN)
set(SDL_VIDEO_DRIVER_OFFSCREEN 1)
file(GLOB VIDEO_OFFSCREEN_SOURCES ${SDL2_SOURCE_DIR}/src/video/offscreen/*.c)
set(SOURCE_FILES ${SOURCE_FILES} ${VIDEO_OFFSCREEN_SOURCES})
set(HAVE_VIDEO_OFFSCREEN TRUE)
set(HAVE_SDL_VIDEO TRUE)
endif()
endif()
# Platform-specific options and settings