---
src/intel/vulkan/anv_image.c | 58 ++++++++++++++++++++++++++++++++++++++++++
src/intel/vulkan/anv_private.h | 5 ++++
2 files changed, 63 insertions(+)
diff --git a/src/intel/vulkan/anv_image.c b/src/intel/vulkan/anv_image.c
index a872149..561da28 100644
--- a/src/intel/vulkan/anv_image.c
+++ b/src/intel/vulkan/anv_image.c
@@ -837,6 +837,64 @@ anv_layout_to_aux_usage(const struct gen_device_info *
const devinfo,
unreachable("layout is not a VkImageLayout enumeration member.");
}
+/**
+ * This function returns true if the given image in the given VkImageLayout
+ * supports unresolved fast-clears.
+ *
+ * @param devinfo The device information of the Intel GPU.
+ * @param image The image that may contain a collection of buffers.
+ * @param aspect The aspect of the image to be accessed.
+ * @param layout The current layout of the image aspect(s).
+ */
+bool
+anv_layout_supports_fast_clear(const struct gen_device_info * const devinfo,
+ const struct anv_image * const image,
+ const VkImageAspectFlagBits aspect,
+ const VkImageLayout layout)
+{
+ /* The aspect must be exactly one of the image aspects. */
+ assert(_mesa_bitcount(aspect) == 1 && (aspect & image->aspects));
+
+ uint32_t plane = anv_image_aspect_to_plane(image->aspects, aspect);
+
+ /* If there is no auxiliary surface allocated, there are no fast-clears */
+ if (image->planes[plane].aux_surface.isl.size == 0)
+ return false;
+
+ /* All images that use an auxiliary surface are required to be tiled. */
+ assert(image->tiling == VK_IMAGE_TILING_OPTIMAL);
+
+ /* Stencil has no aux */
+ assert(aspect != VK_IMAGE_ASPECT_STENCIL_BIT);
+
+ if (aspect == VK_IMAGE_ASPECT_DEPTH_BIT) {
+ /* For depth images (with HiZ), the layout supports fast-clears if and
+ * only if it supports HiZ.
+ */
+ enum isl_aux_usage aux_usage =
+ anv_layout_to_aux_usage(devinfo, image, aspect, layout);
+ return aux_usage == ISL_AUX_USAGE_HIZ;
+ }
+
+ assert(image->aspects & VK_IMAGE_ASPECT_ANY_COLOR_BIT_ANV);
+
+ /* Multisample fast-clear is not yet supported. */
+ if (image->samples > 1)
+ return false;
+
+ /* The only layout which actually supports fast-clears today is
+ * VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL. Some day in the future
+ * this may change if our ability to track clear colors improves.
+ */
+ switch (layout) {
+ case VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL:
+ return true;
+
+ default:
+ return false;
+ }
+}
+
static struct anv_state
alloc_surface_state(struct anv_device *device)
diff --git a/src/intel/vulkan/anv_private.h b/src/intel/vulkan/anv_private.h
index 5dd95a3..461bfed 100644
--- a/src/intel/vulkan/anv_private.h
+++ b/src/intel/vulkan/anv_private.h
@@ -2559,6 +2559,11 @@ anv_layout_to_aux_usage(const struct gen_device_info *
const devinfo,
const struct anv_image *image,
const VkImageAspectFlagBits aspect,
const VkImageLayout layout);
+bool
+anv_layout_supports_fast_clear(const struct gen_device_info * const devinfo,
+ const struct anv_image * const image,
+ const VkImageAspectFlagBits aspect,
+ const VkImageLayout layout);
/* This is defined as a macro so that it works for both
* VkImageSubresourceRange and VkImageSubresourceLayers
--
2.5.0.400.gff86faf
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