Set first provoking vertex on Metal

Signed-off-by: Isaac Marovitz <[email protected]>

Author: IsaacMarovitz

core/rend/metal/metal_renderer.mm

@@ -24,6 +24,7 @@
 #include "hw/aica/dsp.h"
 #include "hw/pvr/ta.h"
 #include "hw/pvr/pvr_mem.h"
+#include "rend/sorter.h"
 
 bool MetalRenderer::Init()
 {
@@ -550,6 +551,8 @@
         palTsp.ClampV = 1;
         [renderEncoder setFragmentSamplerState:samplers.GetSampler(palTsp) atIndex:3];
 
+        setFirstProvokingVertex(pvrrc);
+
         // Upload vertex and index buffers
         VertexShaderUniforms vtxUniforms {};
         vtxUniforms.ndcMat = matrices.GetNormalMatrix();

core/rend/sorter.cpp

@@ -18,7 +18,7 @@
 
 #include <cstring>
 
-// Vulkan and DirectX use the color values of the first vertex for flat shaded triangle strips.
+// Vulkan, DirectX, and Metal use the color values of the first vertex for flat shaded triangle strips.
 // On Dreamcast the last vertex is the provoking one so we must copy it onto the first.
 void setFirstProvokingVertex(rend_context& rendContext)
 {