sna: Add missing implementation for Triangles

Feed both into spans and as a mask fallback.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

src/sna/sna.h

@@ -523,6 +523,26 @@ void sna_composite_trapezoids(CARD8 op,
 			      PictFormatPtr maskFormat,
 			      INT16 xSrc, INT16 ySrc,
 			      int ntrap, xTrapezoid *traps);
+void sna_composite_triangles(CARD8 op,
+			     PicturePtr src,
+			     PicturePtr dst,
+			     PictFormatPtr maskFormat,
+			     INT16 xSrc, INT16 ySrc,
+			     int ntri, xTriangle *tri);
+
+void sna_composite_tristrip(CARD8 op,
+			    PicturePtr src,
+			    PicturePtr dst,
+			    PictFormatPtr maskFormat,
+			    INT16 xSrc, INT16 ySrc,
+			    int npoints, xPointFixed *points);
+
+void sna_composite_trifan(CARD8 op,
+			  PicturePtr src,
+			  PicturePtr dst,
+			  PictFormatPtr maskFormat,
+			  INT16 xSrc, INT16 ySrc,
+			  int npoints, xPointFixed *points);
 
 Bool sna_gradients_create(struct sna *sna);
 void sna_gradients_close(struct sna *sna);

src/sna/sna_accel.c

@@ -3346,6 +3346,11 @@ Bool sna_accel_init(ScreenPtr screen, struct sna *sna)
 			ps->UnrealizeGlyph = sna_glyph_unrealize;
 			ps->AddTraps = sna_add_traps;
 			ps->Trapezoids = sna_composite_trapezoids;
+			ps->Triangles = sna_composite_triangles;
+#if PICTURE_SCREEN_VERSION >= 2
+			ps->TriStrip = sna_composite_tristrip;
+			ps->TriFan = sna_composite_trifan;
+#endif
 		}
 	}
 #endif