anv: add anv_is_format_emulated

anv_is_format_emulated returns true when a format is emulated.  It will
be used for ASTC LDR emulation, but it always return false at the
moment.

Signed-off-by: Chia-I Wu <olvaffe@gmail.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25467>

src/intel/vulkan/anv_device.c

@@ -1351,6 +1351,9 @@ anv_physical_device_try_create(struct vk_instance *vk_instance,
    device->has_protected_contexts = device->info.ver >= 12 &&
       intel_gem_supports_protected_context(fd, device->info.kmd_type);
 
+   /* always false for now */
+   device->emu_astc_ldr = false;
+
    result = anv_physical_device_init_heaps(device, fd);
    if (result != VK_SUCCESS)
       goto fail_base;

src/intel/vulkan/anv_private.h

@@ -92,6 +92,7 @@
 #include "vk_shader_module.h"
 #include "vk_sync.h"
 #include "vk_sync_timeline.h"
+#include "vk_texcompress_astc.h"
 #include "vk_util.h"
 #include "vk_query_pool.h"
 #include "vk_queue.h"
@@ -921,6 +922,9 @@ struct anv_physical_device {
      */
     bool                                        has_sparse;
 
+    /** True if ASTC LDR is supported via emulation */
+    bool                                        emu_astc_ldr;
+
     /**/
     bool                                        uses_ex_bso;
 
@@ -4479,6 +4483,15 @@ bool anv_formats_ccs_e_compatible(const struct intel_device_info *devinfo,
 extern VkFormat
 vk_format_from_android(unsigned android_format, unsigned android_usage);
 
+static inline bool
+anv_is_format_emulated(const struct anv_physical_device *pdevice, VkFormat format)
+{
+   if (pdevice->emu_astc_ldr &&
+       vk_texcompress_astc_emulation_format(format) != VK_FORMAT_UNDEFINED)
+      return true;
+   return false;
+}
+
 static inline struct isl_swizzle
 anv_swizzle_for_render(struct isl_swizzle swizzle)
 {