From 227ae7b968c1351921babdbf6f052239766ffce4 Mon Sep 17 00:00:00 2001
From: Michal Krol <michal@vmware.com>
Date: Wed, 24 Feb 2010 15:16:54 +0100
Subject: cso: Track clip state with cso context.

---
 src/gallium/auxiliary/cso_cache/cso_context.c | 54 +++++++++++++++++++++++++++
 src/gallium/auxiliary/cso_cache/cso_context.h | 13 +++++++
 2 files changed, 67 insertions(+)

(limited to 'src/gallium/auxiliary/cso_cache')

diff --git a/src/gallium/auxiliary/cso_cache/cso_context.c b/src/gallium/auxiliary/cso_cache/cso_context.c
index b5241fa64c..a7335c340c 100644
--- a/src/gallium/auxiliary/cso_cache/cso_context.c
+++ b/src/gallium/auxiliary/cso_cache/cso_context.c
@@ -90,6 +90,9 @@ struct cso_context {
    void *fragment_shader, *fragment_shader_saved, *geometry_shader;
    void *vertex_shader, *vertex_shader_saved, *geometry_shader_saved;
 
+   struct pipe_clip_state clip;
+   struct pipe_clip_state clip_saved;
+
    struct pipe_framebuffer_state fb, fb_saved;
    struct pipe_viewport_state vp, vp_saved;
    struct pipe_blend_color blend_color;
@@ -1126,3 +1129,54 @@ void cso_restore_geometry_shader(struct cso_context *ctx)
    }
    ctx->geometry_shader_saved = NULL;
 }
+
+
+/* clip state */
+
+static INLINE void
+clip_state_cpy(struct pipe_clip_state *dst,
+               const struct pipe_clip_state *src)
+{
+   dst->nr = src->nr;
+   if (src->nr) {
+      memcpy(dst->ucp, src->ucp, src->nr * sizeof(src->ucp[0]));
+   }
+}
+
+static INLINE int
+clip_state_cmp(const struct pipe_clip_state *a,
+               const struct pipe_clip_state *b)
+{
+   if (a->nr != b->nr) {
+      return 1;
+   }
+   if (a->nr) {
+      return memcmp(a->ucp, b->ucp, a->nr * sizeof(a->ucp[0]));
+   }
+   return 0;
+}
+
+void
+cso_set_clip(struct cso_context *ctx,
+             const struct pipe_clip_state *clip)
+{
+   if (clip_state_cmp(&ctx->clip, clip)) {
+      clip_state_cpy(&ctx->clip, clip);
+      ctx->pipe->set_clip_state(ctx->pipe, clip);
+   }
+}
+
+void
+cso_save_clip(struct cso_context *ctx)
+{
+   clip_state_cpy(&ctx->clip_saved, &ctx->clip);
+}
+
+void
+cso_restore_clip(struct cso_context *ctx)
+{
+   if (clip_state_cmp(&ctx->clip, &ctx->clip_saved)) {
+      clip_state_cpy(&ctx->clip, &ctx->clip_saved);
+      ctx->pipe->set_clip_state(ctx->pipe, &ctx->clip_saved);
+   }
+}
diff --git a/src/gallium/auxiliary/cso_cache/cso_context.h b/src/gallium/auxiliary/cso_cache/cso_context.h
index 707b3c2cee..251a9a644f 100644
--- a/src/gallium/auxiliary/cso_cache/cso_context.h
+++ b/src/gallium/auxiliary/cso_cache/cso_context.h
@@ -180,6 +180,19 @@ void cso_save_stencil_ref(struct cso_context *cso);
 void cso_restore_stencil_ref(struct cso_context *cso);
 
 
+/* clip state */
+
+void
+cso_set_clip(struct cso_context *cso,
+             const struct pipe_clip_state *clip);
+
+void
+cso_save_clip(struct cso_context *cso);
+
+void
+cso_restore_clip(struct cso_context *cso);
+
+
 #ifdef	__cplusplus
 }
 #endif
-- 
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