From: Jason Ekstrand <jason.ekstrand@intel.com>
Date: Thu, 14 May 2015 05:16:04 +0000 (-0700)
Subject: vk/pipeline: Add an extra flag for force-disabling the vertex shader
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=d3d4776202e34e0c6651aa7d701492fb9c6f4254;p=mesa.git

vk/pipeline: Add an extra flag for force-disabling the vertex shader

This way we can pass in a vertex shader and yet have the pipeline emit an
empty 3DSTATE_VS packet.  We need this for meta because we need to trick
the compiler into not deleting our inputs but at the same time disable the
VS so that we can use a rectlist.  This should go away once we actually get
SPIR-V.
---

diff --git a/src/vulkan/pipeline.c b/src/vulkan/pipeline.c
index a260c3cd24a..1c4eec5a776 100644
--- a/src/vulkan/pipeline.c
+++ b/src/vulkan/pipeline.c
@@ -388,7 +388,7 @@ anv_pipeline_create(
    offset = 1;
    length = (vue_prog_data->vue_map.num_slots + 1) / 2 - offset;
 
-   if (pipeline->vs_simd8 == NO_KERNEL)
+   if (pipeline->vs_simd8 == NO_KERNEL || (extra && extra->disable_vs))
       anv_batch_emit(&pipeline->batch, GEN8_3DSTATE_VS,
                      .FunctionEnable = false,
                      .VertexURBEntryOutputReadOffset = 1,
diff --git a/src/vulkan/private.h b/src/vulkan/private.h
index fec29306064..b6aac741cdd 100644
--- a/src/vulkan/private.h
+++ b/src/vulkan/private.h
@@ -583,6 +583,7 @@ struct anv_pipeline_create_info {
    bool                                         use_repclear;
    bool                                         disable_viewport;
    bool                                         disable_scissor;
+   bool                                         disable_vs;
    bool                                         use_rectlist;
 };