anv: Add EXT_acquire_xlib_display to anv driver [v3]

This extension adds the ability to borrow an X RandR output for
temporary use directly by a Vulkan application to the anv driver.

v2:
	Simplify addition of VK_USE_PLATFORM_XLIB_XRANDR_KHR to
	vulkan_wsi_args

	Suggested-by: Eric Engestrom <eric.engestrom@imgtec.com>

v3:
	Add extension to list in alphabetical order

	Suggested-by:  Jason Ekstrand <jason@jlekstrand.net>

Signed-off-by: Keith Packard <keithp@keithp.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>

src/intel/Makefile.vulkan.am

@@ -199,6 +199,13 @@ VULKAN_CPPFLAGS += \
 VULKAN_SOURCES += $(VULKAN_WSI_DISPLAY_FILES)
 endif
 
+if HAVE_XLIB_LEASE
+VULKAN_CPPFLAGS += \
+	-DVK_USE_PLATFORM_XLIB_XRANDR_EXT \
+	$(XCB_RANDR_CFLAGS)
+VULKAN_LIB_DEPS += $(XCB_RANDR_LIBS)
+endif
+
 noinst_LTLIBRARIES += vulkan/libvulkan_common.la
 vulkan_libvulkan_common_la_SOURCES = $(VULKAN_SOURCES)
 vulkan_libvulkan_common_la_CFLAGS = $(VULKAN_CFLAGS)

src/intel/vulkan/anv_entrypoints_gen.py

@@ -513,7 +513,10 @@ def get_entrypoints_defines(doc):
 
     for extension in doc.findall('./extensions/extension[@platform]'):
         platform = extension.attrib['platform']
-        define = 'VK_USE_PLATFORM_' + platform.upper() + '_KHR'
+        ext = '_KHR'
+        if platform.upper() == 'XLIB_XRANDR':
+            ext = '_EXT'
+        define = 'VK_USE_PLATFORM_' + platform.upper() + ext
 
         for entrypoint in extension.findall('./require/command'):
             fullname = entrypoint.attrib['name']

src/intel/vulkan/anv_extensions.py

@@ -110,6 +110,7 @@ EXTENSIONS = [
     Extension('VK_KHR_xlib_surface',                      6, 'VK_USE_PLATFORM_XLIB_KHR'),
     Extension('VK_KHR_multiview',                         1, True),
     Extension('VK_KHR_display',                          23, 'VK_USE_PLATFORM_DISPLAY_KHR'),
+    Extension('VK_EXT_acquire_xlib_display',              1, 'VK_USE_PLATFORM_XLIB_XRANDR_EXT'),
     Extension('VK_EXT_debug_report',                      8, True),
     Extension('VK_EXT_direct_mode_display',               1, 'VK_USE_PLATFORM_DISPLAY_KHR'),
     Extension('VK_EXT_external_memory_dma_buf',           1, True),

src/intel/vulkan/anv_extensions_gen.py

@@ -103,12 +103,12 @@ _TEMPLATE_C = Template(COPYRIGHT + """
 #include "vk_util.h"
 
 /* Convert the VK_USE_PLATFORM_* defines to booleans */
-%for platform in ['ANDROID', 'WAYLAND', 'XCB', 'XLIB', 'DISPLAY']:
-#ifdef VK_USE_PLATFORM_${platform}_KHR
-#   undef VK_USE_PLATFORM_${platform}_KHR
-#   define VK_USE_PLATFORM_${platform}_KHR true
+%for platform in ['ANDROID_KHR', 'WAYLAND_KHR', 'XCB_KHR', 'XLIB_KHR', 'DISPLAY_KHR', 'XLIB_XRANDR_EXT']:
+#ifdef VK_USE_PLATFORM_${platform}
+#   undef VK_USE_PLATFORM_${platform}
+#   define VK_USE_PLATFORM_${platform} true
 #else
-#   define VK_USE_PLATFORM_${platform}_KHR false
+#   define VK_USE_PLATFORM_${platform} false
 #endif
 %endfor
 

src/intel/vulkan/anv_wsi_display.c

@@ -144,3 +144,33 @@ anv_ReleaseDisplayEXT(VkPhysicalDevice physical_device,
                               &pdevice->wsi_device,
                               display);
 }
+
+#ifdef VK_USE_PLATFORM_XLIB_XRANDR_EXT
+VkResult
+anv_AcquireXlibDisplayEXT(VkPhysicalDevice     physical_device,
+                           Display              *dpy,
+                           VkDisplayKHR         display)
+{
+   ANV_FROM_HANDLE(anv_physical_device, pdevice, physical_device);
+
+   return wsi_acquire_xlib_display(physical_device,
+                                   &pdevice->wsi_device,
+                                   dpy,
+                                   display);
+}
+
+VkResult
+anv_GetRandROutputDisplayEXT(VkPhysicalDevice  physical_device,
+                              Display           *dpy,
+                              RROutput          output,
+                              VkDisplayKHR      *display)
+{
+   ANV_FROM_HANDLE(anv_physical_device, pdevice, physical_device);
+
+   return wsi_get_randr_output_display(physical_device,
+                                       &pdevice->wsi_device,
+                                       dpy,
+                                       output,
+                                       display);
+}
+#endif /* VK_USE_PLATFORM_XLIB_XRANDR_EXT */

src/intel/vulkan/meson.build

@@ -169,6 +169,11 @@ if with_platform_drm
   libanv_files += files('anv_wsi_display.c')
 endif
 
+if with_xlib_lease
+  anv_deps += dep_xcb_xrandr
+  anv_flags += '-DVK_USE_PLATFORM_XLIB_XRANDR_EXT'
+endif
+
 libanv_common = static_library(
   'anv_common',
   [libanv_files, anv_entrypoints, anv_extensions_c, anv_extensions_h],