[Mesa-dev] [PATCH] anv/blit: Use CLAMP_TO_EDGE for scaled blits

[Jason Ekstrand]

When upscaling you can end up interpolating between the edge pixel and one
past the edge.  Using CLAMP_TO_EDGE seems like the most reasonable thing to
do in this case.  This fixes two of the new Vulkan CTS tests in
dEQP-VK.api.copy_and_blit.blit_image.*

Jason Ekstrand <jason at jlekstrand.net>
Cc: "12.0" <mesa-stable at lists.freedesktop.org>
---
 src/intel/vulkan/anv_meta_blit.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/intel/vulkan/anv_meta_blit.c b/src/intel/vulkan/anv_meta_blit.c
index 3c54ef4..dc098ef 100644
--- a/src/intel/vulkan/anv_meta_blit.c
+++ b/src/intel/vulkan/anv_meta_blit.c
@@ -211,6 +211,9 @@ meta_emit_blit(struct anv_cmd_buffer *cmd_buffer,
          .sType = VK_STRUCTURE_TYPE_SAMPLER_CREATE_INFO,
          .magFilter = blit_filter,
          .minFilter = blit_filter,
+         .addressModeU = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE,
+         .addressModeV = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE,
+         .addressModeW = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE,
       }, &cmd_buffer->pool->alloc, &sampler);
 
    VkDescriptorPool desc_pool;
-- 
2.5.0.400.gff86faf