autogen.sh
author Sam Lantinga <slouken@libsdl.org>
Wed, 18 Oct 2017 08:52:04 -0700
changeset 11630 ad4b5d85edee
parent 10722 30e271a26a02
permissions -rwxr-xr-x
Fixed bug 3821 - Allow SDL_CreateWindow and SDL_CreateRenderer with OpenGL ES 3.0 (GLES3) for Angle (Windows)

Carlos

Angle supports GLES3 but when using these functions (SDL_CreateWindow and SDL_CreateRenderer), defaults again to GLES2.0.

A current workaround (hack) to retrieve a GLES3.0 context with Angle is:

1) set

SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0);

after InitSDL AND after calling SDL_CreateWindow (before SDL_CreateRenderer)

2) Comment lines 2032-2044 in SDL_render_gles2.c, funtion GLES2_CreateRenderer

window_flags = SDL_GetWindowFlags(window);
if (!(window_flags & SDL_WINDOW_OPENGL) ||
profile_mask != SDL_GL_CONTEXT_PROFILE_ES || major != RENDERER_CONTEXT_MAJOR || minor != RENDERER_CONTEXT_MINOR) {

changed_window = SDL_TRUE;
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_ES);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, RENDERER_CONTEXT_MAJOR);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, RENDERER_CONTEXT_MINOR);

if (SDL_RecreateWindow(window, window_flags | SDL_WINDOW_OPENGL) < 0) {
goto error;
}
}

This retrives a GLES3 context as confirmed using glGetString(GL_VERSION). This should be fixed by modifying a few if's.
     1 #!/bin/sh
     2 #
     3 echo "Generating build information using autoconf"
     4 echo "This may take a while ..."
     5 
     6 srcdir=`dirname $0`
     7 test -z "$srcdir" && srcdir=.
     8 cd "$srcdir"
     9 
    10 # Regenerate configuration files
    11 cat acinclude/* >aclocal.m4
    12 found=false
    13 for autoconf in autoconf autoconf259 autoconf-2.59
    14 do if which $autoconf >/dev/null 2>&1; then $autoconf && found=true; break; fi
    15 done
    16 if test x$found = xfalse; then
    17     echo "Couldn't find autoconf, aborting"
    18     exit 1
    19 fi
    20 (cd test; sh autogen.sh)
    21 
    22 # Run configure for this platform
    23 echo "Now you are ready to run ./configure"