From a369963b18fc7ef75f6f5354e0d685cef9ecb70d Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexdeucher@gmail.com>
Date: Mon, 20 Jul 2009 17:22:59 -0400
Subject: [PATCH] r600: add user clip plane support

---
 src/mesa/drivers/dri/r600/r700_chip.c   | 22 ++++++++++++++++
 src/mesa/drivers/dri/r600/r700_render.c |  1 +
 src/mesa/drivers/dri/r600/r700_state.c  | 35 +++++++++++++++++++++++--
 3 files changed, 56 insertions(+), 2 deletions(-)

diff --git a/src/mesa/drivers/dri/r600/r700_chip.c b/src/mesa/drivers/dri/r600/r700_chip.c
index 087d17312e9..91aa8fc8fc6 100644
--- a/src/mesa/drivers/dri/r600/r700_chip.c
+++ b/src/mesa/drivers/dri/r600/r700_chip.c
@@ -722,3 +722,25 @@ GLboolean r700SendSQConfig(context_t *context)
 	return GL_TRUE;
 }
 
+GLboolean r700SendUCPState(context_t *context)
+{
+	R700_CHIP_CONTEXT *r700 = R700_CONTEXT_STATES(context);
+	BATCH_LOCALS(&context->radeon);
+	int i;
+
+	for (i = 0; i < R700_MAX_UCP; i++) {
+		if (r700->ucp[i].enabled) {
+			BEGIN_BATCH_NO_AUTOSTATE(6);
+			R600_OUT_BATCH_REGSEQ(PA_CL_UCP_0_X + (16 * i), 4);
+			R600_OUT_BATCH(r700->ucp[i].PA_CL_UCP_0_X.u32All);
+			R600_OUT_BATCH(r700->ucp[i].PA_CL_UCP_0_Y.u32All);
+			R600_OUT_BATCH(r700->ucp[i].PA_CL_UCP_0_Z.u32All);
+			R600_OUT_BATCH(r700->ucp[i].PA_CL_UCP_0_W.u32All);
+			END_BATCH();
+			COMMIT_BATCH();
+		}
+	}
+
+	return GL_TRUE;
+}
+
diff --git a/src/mesa/drivers/dri/r600/r700_render.c b/src/mesa/drivers/dri/r600/r700_render.c
index f1e467a317f..77cbe3cfd0f 100644
--- a/src/mesa/drivers/dri/r600/r700_render.c
+++ b/src/mesa/drivers/dri/r600/r700_render.c
@@ -322,6 +322,7 @@ static GLboolean r700RunRender(GLcontext * ctx,
     r700SendPSState(context);
     r700SendVSState(context);
 
+    r700SendUCPState(context);
     r700SendContextStates(context);
     r700SendViewportState(context, 0);
     r700SendRenderTargetState(context, 0);
diff --git a/src/mesa/drivers/dri/r600/r700_state.c b/src/mesa/drivers/dri/r600/r700_state.c
index 1ccd793512b..1d6d398f63e 100644
--- a/src/mesa/drivers/dri/r600/r700_state.c
+++ b/src/mesa/drivers/dri/r600/r700_state.c
@@ -56,6 +56,8 @@
 #include "r700_vertprog.h"
 
 
+static void r700SetClipPlaneState(GLcontext * ctx, GLenum cap, GLboolean state);
+
 void r700SetDefaultStates(context_t *context) //--------------------
 {
     
@@ -446,7 +448,7 @@ static void r700Enable(GLcontext * ctx, GLenum cap, GLboolean state) //---------
 	case GL_CLIP_PLANE3:
 	case GL_CLIP_PLANE4:
 	case GL_CLIP_PLANE5:
-		//r700SetClipPlaneState(ctx, cap, state);
+		r700SetClipPlaneState(ctx, cap, state);
 		break;
 	case GL_DEPTH_TEST:
 		r700SetDepthState(ctx);
@@ -675,8 +677,37 @@ static void r700RenderMode(GLcontext * ctx, GLenum mode) //---------------------
 {
 }
 
-static void r700ClipPlane( GLcontext *ctx, GLenum plane, const GLfloat *eq ) //-----------------
+static void r700ClipPlane( GLcontext *ctx, GLenum plane, const GLfloat *eq )
 {
+	context_t *context = R700_CONTEXT(ctx);
+	R700_CHIP_CONTEXT *r700 = (R700_CHIP_CONTEXT*)(&context->hw);
+	GLint p;
+	GLint *ip;
+
+	p = (GLint) plane - (GLint) GL_CLIP_PLANE0;
+	ip = (GLint *)ctx->Transform._ClipUserPlane[p];
+
+	r700->ucp[p].PA_CL_UCP_0_X.u32All = ip[0];
+	r700->ucp[p].PA_CL_UCP_0_Y.u32All = ip[1];
+	r700->ucp[p].PA_CL_UCP_0_Z.u32All = ip[2];
+	r700->ucp[p].PA_CL_UCP_0_W.u32All = ip[3];
+}
+
+static void r700SetClipPlaneState(GLcontext * ctx, GLenum cap, GLboolean state)
+{
+	context_t *context = R700_CONTEXT(ctx);
+	R700_CHIP_CONTEXT *r700 = (R700_CHIP_CONTEXT*)(&context->hw);
+	GLuint p;
+
+	p = cap - GL_CLIP_PLANE0;
+	if (state) {
+		r700->PA_CL_CLIP_CNTL.u32All |= (UCP_ENA_0_bit << p);
+		r700->ucp[p].enabled = GL_TRUE;
+		r700ClipPlane(ctx, cap, NULL);
+	} else {
+		r700->PA_CL_CLIP_CNTL.u32All &= ~(UCP_ENA_0_bit << p);
+		r700->ucp[p].enabled = GL_FALSE;
+	}
 }
 
 void r700SetScissor(context_t *context) //---------------
-- 
2.30.2