From c9d886c84e4102f7b9c464c704eecb61d37b3df4 Mon Sep 17 00:00:00 2001 From: ReinUsesLisp Date: Sun, 7 Jul 2019 20:36:42 -0300 Subject: gl_shader_decompiler: Implement gl_ViewportIndex and gl_Layer in vertex shaders This commit implements gl_ViewportIndex and gl_Layer in vertex and geometry shaders. In the case it's used in a vertex shader, it requires ARB_shader_viewport_layer_array. This extension is available on AMD and Nvidia devices (mesa and proprietary drivers), but not available on Intel on any platform. At the moment of writing this description I don't know if this is a hardware limitation or a driver limitation. In the case that ARB_shader_viewport_layer_array is not available, writes to these registers on a vertex shader are ignored, with the appropriate logging. --- src/video_core/shader/shader_ir.cpp | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'src/video_core/shader/shader_ir.cpp') diff --git a/src/video_core/shader/shader_ir.cpp b/src/video_core/shader/shader_ir.cpp index 11b545cca..fd80dd116 100644 --- a/src/video_core/shader/shader_ir.cpp +++ b/src/video_core/shader/shader_ir.cpp @@ -89,6 +89,22 @@ Node ShaderIR::GetPhysicalInputAttribute(Tegra::Shader::Register physical_addres } Node ShaderIR::GetOutputAttribute(Attribute::Index index, u64 element, Node buffer) { + if (index == Attribute::Index::LayerViewportPointSize) { + switch (element) { + case 0: + UNIMPLEMENTED(); + break; + case 1: + uses_layer = true; + break; + case 2: + uses_viewport_index = true; + break; + case 3: + uses_point_size = true; + break; + } + } if (index == Attribute::Index::ClipDistances0123 || index == Attribute::Index::ClipDistances4567) { const auto clip_index = -- cgit v1.2.3