meson: use a feature option for gles1

Reviewed-by: Jesse Natalie <jenatali@microsoft.com>
Acked-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20409>

docs/opengles.rst

@@ -10,14 +10,14 @@ OpenGL ES depends on a working EGL implementation. Please refer to
 Build the Libraries
 -------------------
 
-#. Run ``meson configure`` with ``-D gles1=true -D gles2=true`` and
+#. Run ``meson configure`` with ``-D gles1=enabled -D gles2=true`` and
    enable the Gallium driver for your hardware.
 #. Build and install Mesa as usual.
 
 Alternatively, if XCB-DRI2 is installed on the system, one can use
 ``egl_dri2`` EGL driver with OpenGL|ES-enabled DRI drivers
 
-#. Run ``meson configure`` with ``-D gles1=true -D gles2=true``.
+#. Run ``meson configure`` with ``-D gles1=enabled -D gles2=true``.
 #. Build and install Mesa as usual.
 
 Both methods will install libGLESv1_CM, libGLESv2, libEGL, and one or

meson.build

@@ -107,14 +107,6 @@ if gbm_backends_path == ''
   gbm_backends_path = join_paths(get_option('prefix'), get_option('libdir'), 'gbm')
 endif
 
-with_gles1 = get_option('gles1')
-if with_gles1 == 'true'
-  with_gles1 = 'enabled'
-  warning('gles1 option "true" deprecated, please use "enabled" instead.')
-elif with_gles1 == 'false'
-  with_gles1 = 'disabled'
-  warning('gles1 option "false" deprecated, please use "disabled" instead.')
-endif
 with_gles2 = get_option('gles2')
 if with_gles2 == 'true'
   with_gles2 = 'enabled'
@@ -138,27 +130,27 @@ with_shared_glapi = get_option('shared-glapi') \
   .disable_auto_if(host_machine.system() == 'windows') \
   .allowed()
 
+with_gles1 = get_option('gles1') \
+  .require(with_shared_glapi, error_message : 'OpengGL ES 1.x requires shared-glapi') \
+  .require(with_opengl, error_message : 'building OpenGL ES 1.x without OpenGL is not supported.') \
+  .allowed()
+
 # shared-glapi is required if at least two OpenGL APIs are being built
 if not with_shared_glapi
-  if ((with_gles1 == 'enabled' and with_gles2 == 'enabled') or
+  if with_gles2 == 'enabled' and not with_opengl
-      (with_gles1 == 'enabled' and with_opengl) or
-      (with_gles2 == 'enabled' and with_opengl))
     error('shared-glapi required for building two or more of OpenGL, OpenGL ES 1.x, OpenGL ES 2.x')
   endif
-  with_gles1 = 'disabled'
   with_gles2 = 'disabled'
 endif
 
 # We require OpenGL for OpenGL ES
 if not with_opengl
-  if (with_gles1 == 'enabled' or with_gles2 == 'enabled') and not with_opengl
+  if with_gles2 == 'enabled' and not with_opengl
     error('building OpenGL ES without OpenGL is not supported.')
   endif
-  with_gles1 = 'disabled'
   with_gles2 = 'disabled'
 endif
 
-with_gles1 = with_gles1 != 'disabled'
 with_gles2 = with_gles2 != 'disabled'
 with_any_opengl = with_opengl or with_gles1 or with_gles2
 # Only build shared_glapi if at least one OpenGL API is enabled

meson_options.txt

@@ -246,9 +246,7 @@ option(
 )
 option(
   'gles1',
-  type : 'combo',
+  type : 'feature',
-  value : 'auto',
-  choices : ['auto', 'true', 'false', 'enabled', 'disabled'],
   description : 'Build support for OpenGL ES 1.x'
 )
 option(