From 2a7da1bddbee2be09ae6c2276a04c658807720b0 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Marek=20Ol=C5=A1=C3=A1k?= <marek.olsak@amd.com>
Date: Mon, 2 Mar 2015 16:32:25 +0100
Subject: [PATCH] gallium/cso: add support for tessellation shaders
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Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Signed-off-by: Marek Olšák <marek.olsak@amd.com>
---
 src/gallium/auxiliary/cso_cache/cso_context.c | 93 +++++++++++++++++++++++++++
 src/gallium/auxiliary/cso_cache/cso_context.h | 12 ++++
 2 files changed, 105 insertions(+)

diff --git a/src/gallium/auxiliary/cso_cache/cso_context.c b/src/gallium/auxiliary/cso_cache/cso_context.c
index 31ffa7d..b352909 100644
--- a/src/gallium/auxiliary/cso_cache/cso_context.c
+++ b/src/gallium/auxiliary/cso_cache/cso_context.c
@@ -82,6 +82,7 @@ struct cso_context {
    struct u_vbuf *vbuf;
 
    boolean has_geometry_shader;
+   boolean has_tessellation;
    boolean has_streamout;
 
    struct sampler_info samplers[PIPE_SHADER_TYPES];
@@ -108,6 +109,8 @@ struct cso_context {
    void *fragment_shader, *fragment_shader_saved;
    void *vertex_shader, *vertex_shader_saved;
    void *geometry_shader, *geometry_shader_saved;
+   void *tessctrl_shader, *tessctrl_shader_saved;
+   void *tesseval_shader, *tesseval_shader_saved;
    void *velements, *velements_saved;
    struct pipe_query *render_condition, *render_condition_saved;
    uint render_condition_mode, render_condition_mode_saved;
@@ -273,6 +276,10 @@ struct cso_context *cso_create_context( struct pipe_context *pipe )
                                 PIPE_SHADER_CAP_MAX_INSTRUCTIONS) > 0) {
       ctx->has_geometry_shader = TRUE;
    }
+   if (pipe->screen->get_shader_param(pipe->screen, PIPE_SHADER_TESS_CTRL,
+                                PIPE_SHADER_CAP_MAX_INSTRUCTIONS) > 0) {
+      ctx->has_tessellation = TRUE;
+   }
    if (pipe->screen->get_param(pipe->screen,
                                PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS) != 0) {
       ctx->has_streamout = TRUE;
@@ -812,6 +819,92 @@ void cso_restore_geometry_shader(struct cso_context *ctx)
    ctx->geometry_shader_saved = NULL;
 }
 
+void cso_set_tessctrl_shader_handle(struct cso_context *ctx, void *handle)
+{
+   assert(ctx->has_tessellation || !handle);
+
+   if (ctx->has_tessellation && ctx->tessctrl_shader != handle) {
+      ctx->tessctrl_shader = handle;
+      ctx->pipe->bind_tcs_state(ctx->pipe, handle);
+   }
+}
+
+void cso_delete_tessctrl_shader(struct cso_context *ctx, void *handle)
+{
+    if (handle == ctx->tessctrl_shader) {
+      /* unbind before deleting */
+      ctx->pipe->bind_tcs_state(ctx->pipe, NULL);
+      ctx->tessctrl_shader = NULL;
+   }
+   ctx->pipe->delete_tcs_state(ctx->pipe, handle);
+}
+
+void cso_save_tessctrl_shader(struct cso_context *ctx)
+{
+   if (!ctx->has_tessellation) {
+      return;
+   }
+
+   assert(!ctx->tessctrl_shader_saved);
+   ctx->tessctrl_shader_saved = ctx->tessctrl_shader;
+}
+
+void cso_restore_tessctrl_shader(struct cso_context *ctx)
+{
+   if (!ctx->has_tessellation) {
+      return;
+   }
+
+   if (ctx->tessctrl_shader_saved != ctx->tessctrl_shader) {
+      ctx->pipe->bind_tcs_state(ctx->pipe, ctx->tessctrl_shader_saved);
+      ctx->tessctrl_shader = ctx->tessctrl_shader_saved;
+   }
+   ctx->tessctrl_shader_saved = NULL;
+}
+
+void cso_set_tesseval_shader_handle(struct cso_context *ctx, void *handle)
+{
+   assert(ctx->has_tessellation || !handle);
+
+   if (ctx->has_tessellation && ctx->tesseval_shader != handle) {
+      ctx->tesseval_shader = handle;
+      ctx->pipe->bind_tes_state(ctx->pipe, handle);
+   }
+}
+
+void cso_delete_tesseval_shader(struct cso_context *ctx, void *handle)
+{
+    if (handle == ctx->tesseval_shader) {
+      /* unbind before deleting */
+      ctx->pipe->bind_tes_state(ctx->pipe, NULL);
+      ctx->tesseval_shader = NULL;
+   }
+   ctx->pipe->delete_tes_state(ctx->pipe, handle);
+}
+
+void cso_save_tesseval_shader(struct cso_context *ctx)
+{
+   if (!ctx->has_tessellation) {
+      return;
+   }
+
+   assert(!ctx->tesseval_shader_saved);
+   ctx->tesseval_shader_saved = ctx->tesseval_shader;
+}
+
+void cso_restore_tesseval_shader(struct cso_context *ctx)
+{
+   if (!ctx->has_tessellation) {
+      return;
+   }
+
+   if (ctx->tesseval_shader_saved != ctx->tesseval_shader) {
+      ctx->pipe->bind_tes_state(ctx->pipe, ctx->tesseval_shader_saved);
+      ctx->tesseval_shader = ctx->tesseval_shader_saved;
+   }
+   ctx->tesseval_shader_saved = NULL;
+}
+
 /* clip state */
 
 static INLINE void
diff --git a/src/gallium/auxiliary/cso_cache/cso_context.h b/src/gallium/auxiliary/cso_cache/cso_context.h
index aa56c58..cc50b60 100644
--- a/src/gallium/auxiliary/cso_cache/cso_context.h
+++ b/src/gallium/auxiliary/cso_cache/cso_context.h
@@ -141,6 +141,18 @@ void cso_save_geometry_shader(struct cso_context *cso);
 void cso_restore_geometry_shader(struct cso_context *cso);
 
 
+void cso_set_tessctrl_shader_handle(struct cso_context *ctx, void *handle);
+void cso_delete_tessctrl_shader(struct cso_context *ctx, void *handle);
+void cso_save_tessctrl_shader(struct cso_context *cso);
+void cso_restore_tessctrl_shader(struct cso_context *cso);
+
+
+void cso_set_tesseval_shader_handle(struct cso_context *ctx, void *handle);
+void cso_delete_tesseval_shader(struct cso_context *ctx, void *handle);
+void cso_save_tesseval_shader(struct cso_context *cso);
+void cso_restore_tesseval_shader(struct cso_context *cso);
+
+
 void cso_set_framebuffer(struct cso_context *cso,
                          const struct pipe_framebuffer_state *fb);
 void cso_save_framebuffer(struct cso_context *cso);
-- 
2.7.4