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Fall back to GLES2 if GLES3 is not working

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This adds a static is_viable() method to all rasterizers which has to be
called before initializing the rasterizer. This allows us to check what
rasterizer to use in OS::initialize together with the GL context
initialization.

This commit also adds a new project setting
"rendering/quality/driver/driver_fallback" which allows the creator of a
project to specify whether or not fallback to GLES2 is allowed. This
setting is ignored for the editor so the editor will always open even if
the project itself cannot run. This will hopefully reduce confusion for
users downloading projects from the internet.

We also no longer crash when GLES3 is not functioning on a platform.

This fixes #15324
This commit is contained in:
Hein-Pieter van Braam 2018-08-25 00:04:25 +02:00
parent 8c435a343e
commit 08f452d1a9
16 changed files with 417 additions and 171 deletions
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4
main/main.cpp
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@ -830,6 +830,9 @@ Error Main::setup(const char *execpath, int argc, char *argv[], bool p_second_ph
video_driver = GLOBAL_GET("rendering/quality/driver/driver_name");
}
GLOBAL_DEF("rendering/quality/driver/driver_fallback", "Best");
ProjectSettings::get_singleton()->set_custom_property_info("rendering/quality/driver/driver_fallback", PropertyInfo(Variant::STRING, "rendering/quality/driver/driver_fallback", PROPERTY_HINT_ENUM, "Best,Never"));
GLOBAL_DEF("display/window/size/width", 1024);
GLOBAL_DEF("display/window/size/height", 600);
GLOBAL_DEF("display/window/size/resizable", true);
@ -1040,6 +1043,7 @@ Error Main::setup2(Thread::ID p_main_tid_override) {
if (err != OK) {
return err;
}
if (init_use_custom_pos) {
OS::get_singleton()->set_window_position(init_custom_pos);
}