+static void nv10ViewportScale(nouveauContextPtr nmesa)
+{
+ GLcontext *ctx = nmesa->glCtx;
+ GLuint w = ctx->Viewport.Width;
+ GLuint h = ctx->Viewport.Height;
+
+ GLfloat max_depth = (ctx->Viewport.Near + ctx->Viewport.Far) * 0.5;
+ switch (ctx->DrawBuffer->_DepthBuffer->DepthBits) {
+ case 16:
+ max_depth *= 32767.0;
+ break;
+ case 24:
+ max_depth *= 16777215.0;
+ break;
+ }
+
+ BEGIN_RING_CACHE(NvSub3D, NV10_TCL_PRIMITIVE_3D_VIEWPORT_SCALE_X, 4);
+ OUT_RING_CACHEf ((((GLfloat) w) * 0.5) - 2048.0);
+ OUT_RING_CACHEf ((((GLfloat) h) * 0.5) - 2048.0);
+ OUT_RING_CACHEf (max_depth);
+ OUT_RING_CACHEf (0.0);
+}
+