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spirv: Add SpvCapabilityShaderViewportIndexLayerEXT

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This capability allows gl_ViewportIndex and gl_Layer to also be used
as outputs in Vertex and Tesselation shaders.

v2: Make conditional to the capability, add gl_Layer, add tesselation
    shaders. (Iago)

v3: Don't export to tesselation control shader.

v4: Add Reviewd-by tag.

Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
This commit is contained in:
Caio Marcelo de Oliveira Filho
2018-03-05 13:58:11 -08:00
committed by Samuel Iglesias Gonsálvez
parent 487f8d48c9
commit c17808562e
3 changed files with 13 additions and 0 deletions
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8
src/compiler/spirv/vtn_variables.c
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@@ -1187,6 +1187,10 @@ vtn_get_builtin_location(struct vtn_builder *b,
*mode = nir_var_shader_in;
else if (b->shader->info.stage == MESA_SHADER_GEOMETRY)
*mode = nir_var_shader_out;
else if (b->options && b->options->caps.shader_viewport_index_layer &&
(b->shader->info.stage == MESA_SHADER_VERTEX ||
b->shader->info.stage == MESA_SHADER_TESS_EVAL))
*mode = nir_var_shader_out;
else
vtn_fail("invalid stage for SpvBuiltInLayer");
break;
@@ -1194,6 +1198,10 @@ vtn_get_builtin_location(struct vtn_builder *b,
*location = VARYING_SLOT_VIEWPORT;
if (b->shader->info.stage == MESA_SHADER_GEOMETRY)
*mode = nir_var_shader_out;
else if (b->options && b->options->caps.shader_viewport_index_layer &&
(b->shader->info.stage == MESA_SHADER_VERTEX ||
b->shader->info.stage == MESA_SHADER_TESS_EVAL))
*mode = nir_var_shader_out;
else if (b->shader->info.stage == MESA_SHADER_FRAGMENT)
*mode = nir_var_shader_in;
else