egl/wgl: Support EGL_MESA_query_driver

Acked-by: Daniel Stone <daniels@collabora.com>
Acked-by: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Acked-by: Sidney Just <justsid@x-plane.com>
Acked-by: Jason Ekstrand <jason.ekstrand@collabora.com>
Tested-by: Yonggang Luo <luoyonggang@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12964>

src/egl/drivers/wgl/egl_wgl.c

@@ -34,6 +34,7 @@
 #include <stw_context.h>
 #include <stw_framebuffer.h>
 #include <stw_image.h>
+#include <stw_winsys.h>
 
 #include <GL/wglext.h>
 
@@ -1035,6 +1036,18 @@ wgl_destroy_image_khr(_EGLDisplay *disp, _EGLImage *img)
    return EGL_TRUE;
 }
 
+static const char *
+wgl_query_driver_name(_EGLDisplay *disp)
+{
+   return stw_get_device()->stw_winsys->get_name();
+}
+
+static char *
+wgl_query_driver_config(_EGLDisplay *disp)
+{
+   return stw_get_config_xml();
+}
+
 struct _egl_driver _eglDriver = {
    .Initialize = wgl_initialize,
    .Terminate = wgl_terminate,
@@ -1054,5 +1067,7 @@ struct _egl_driver _eglDriver = {
    .WaitNative = wgl_wait_native,
    .CreateImageKHR = wgl_create_image_khr,
    .DestroyImageKHR = wgl_destroy_image_khr,
+   .QueryDriverName = wgl_query_driver_name,
+   .QueryDriverConfig = wgl_query_driver_config,
 };
 

src/gallium/frontends/wgl/stw_device.c

@@ -102,13 +102,13 @@ init_screen(const struct stw_winsys *stw_winsys, HDC hdc)
    return true;
 }
 
+static const driOptionDescription gallium_driconf[] = {
+   #include "pipe-loader/driinfo_gallium.h"
+};
+
 static void
 init_options()
 {
-   const driOptionDescription gallium_driconf[] = {
-      #include "pipe-loader/driinfo_gallium.h"
-   };
-
    const char *driver_name = stw_dev->stw_winsys->get_name ? stw_dev->stw_winsys->get_name() : NULL;
    driParseOptionInfo(&stw_dev->option_info, gallium_driconf, ARRAY_SIZE(gallium_driconf));
    driParseConfigFiles(&stw_dev->option_cache, &stw_dev->option_info, 0,
@@ -117,6 +117,12 @@ init_options()
    u_driconf_fill_st_options(&stw_dev->st_options, &stw_dev->option_cache);
 }
 
+char *
+stw_get_config_xml(void)
+{
+   return driGetOptionsXml(gallium_driconf, ARRAY_SIZE(gallium_driconf));
+}
+
 boolean
 stw_init(const struct stw_winsys *stw_winsys)
 {

src/gallium/frontends/wgl/stw_device.h

@@ -103,6 +103,9 @@ stw_init_screen(HDC hdc);
 struct stw_device *
 stw_get_device(void);
 
+char *
+stw_get_config_xml(void);
+
 static inline struct stw_context *
 stw_lookup_context_locked( DHGLRC dhglrc )
 {

src/gallium/targets/wgl/gallium_wgl.def.in

@@ -43,3 +43,4 @@ stw_create_image_from_texture
 stw_create_image_from_renderbuffer
 stw_destroy_image
 stw_translate_image
+stw_get_config_xml