nv50: avoid crash on updating RASTERIZE_ENABLE state

When doing blit using the 3D engine, the rasterizer cso may be NULL.

Ported from nvc0 commit 8aa8b0539.

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>

diff --git a/src/gallium/drivers/nv50/nv50_surface.c b/src/gallium/drivers/nv50/nv50_surface.c
index d6066f2..30dab0b 100644 (file)
--- a/src/gallium/drivers/nv50/nv50_surface.c
+++ b/src/gallium/drivers/nv50/nv50_surface.c
@@ -458,6 +458,7 @@ struct nv50_blitctx
    enum pipe_texture_target target;
    struct {
       struct pipe_framebuffer_state fb;
+      struct nv50_rasterizer_stateobj *rast;
       struct nv50_program *vp;
       struct nv50_program *gp;
       struct nv50_program *fp;
@@ -467,6 +468,7 @@ struct nv50_blitctx
       struct nv50_tsc_entry *sampler[2];
       uint32_t dirty;
    } saved;
+   struct nv50_rasterizer_stateobj rast;
 };
 
 static void
@@ -836,10 +838,14 @@ nv50_blitctx_pre_blit(struct nv50_blitctx *ctx)
    ctx->saved.fb.cbufs[0] = nv50->framebuffer.cbufs[0];
    ctx->saved.fb.zsbuf = nv50->framebuffer.zsbuf;
 
+   ctx->saved.rast = nv50->rast;
+
    ctx->saved.vp = nv50->vertprog;
    ctx->saved.gp = nv50->gmtyprog;
    ctx->saved.fp = nv50->fragprog;
 
+   nv50->rast = &ctx->rast;
+
    nv50->vertprog = &blitter->vp;
    nv50->gmtyprog = NULL;
    nv50->fragprog = ctx->fp;
@@ -884,6 +890,8 @@ nv50_blitctx_post_blit(struct nv50_blitctx *blit)
    nv50->framebuffer.cbufs[0] = blit->saved.fb.cbufs[0];
    nv50->framebuffer.zsbuf = blit->saved.fb.zsbuf;
 
+   nv50->rast = blit->saved.rast;
+
    nv50->vertprog = blit->saved.vp;
    nv50->gmtyprog = blit->saved.gp;
    nv50->fragprog = blit->saved.fp;
@@ -1328,6 +1336,8 @@ nv50_blitctx_create(struct nv50_context *nv50)
 
    nv50->blit->nv50 = nv50;
 
+   nv50->blit->rast.pipe.half_pixel_center = 1;
+
    return TRUE;
 }