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-rw-r--r--src/mesa/tnl/t_context.h5
-rw-r--r--src/mesa/tnl/t_draw.c58
-rw-r--r--src/mesa/tnl/t_rasterpos.c25
-rw-r--r--src/mesa/tnl/t_vb_cliptmp.h103
-rw-r--r--src/mesa/tnl/t_vb_program.c23
-rw-r--r--src/mesa/tnl/t_vb_vertex.c55
6 files changed, 221 insertions, 48 deletions
diff --git a/src/mesa/tnl/t_context.h b/src/mesa/tnl/t_context.h
index c19eb3df3c..ca4edcfcb9 100644
--- a/src/mesa/tnl/t_context.h
+++ b/src/mesa/tnl/t_context.h
@@ -207,6 +207,7 @@ struct vertex_buffer
GLvector4f *EyePtr; /* _TNL_BIT_POS */
GLvector4f *ClipPtr; /* _TNL_BIT_POS */
GLvector4f *NdcPtr; /* _TNL_BIT_POS */
+ GLfloat *ClipDistancePtr[MAX_CLIP_PLANES]; /* _TNL_BIT_POS */
GLubyte ClipOrMask; /* _TNL_BIT_POS */
GLubyte ClipAndMask; /* _TNL_BIT_POS */
GLubyte *ClipMask; /* _TNL_BIT_POS */
@@ -548,4 +549,8 @@ typedef struct
#define MAX_TYPES TYPE_IDX(GL_DOUBLE)+1 /* 0xa + 1 */
+extern void
+tnl_clip_prepare(GLcontext *ctx);
+
+
#endif
diff --git a/src/mesa/tnl/t_draw.c b/src/mesa/tnl/t_draw.c
index c64c2c2077..04fa106300 100644
--- a/src/mesa/tnl/t_draw.c
+++ b/src/mesa/tnl/t_draw.c
@@ -316,22 +316,27 @@ static void bind_indices( GLcontext *ctx,
ptr = ADD_POINTERS(ib->obj->Pointer, ib->ptr);
- if (ib->type == GL_UNSIGNED_INT) {
+ if (ib->type == GL_UNSIGNED_INT && VB->Primitive[0].basevertex == 0) {
VB->Elts = (GLuint *) ptr;
}
else {
GLuint *elts = (GLuint *)get_space(ctx, ib->count * sizeof(GLuint));
VB->Elts = elts;
- if (ib->type == GL_UNSIGNED_SHORT) {
+ if (ib->type == GL_UNSIGNED_INT) {
+ const GLuint *in = (GLuint *)ptr;
+ for (i = 0; i < ib->count; i++)
+ *elts++ = (GLuint)(*in++) + VB->Primitive[0].basevertex;
+ }
+ else if (ib->type == GL_UNSIGNED_SHORT) {
const GLushort *in = (GLushort *)ptr;
for (i = 0; i < ib->count; i++)
- *elts++ = (GLuint)(*in++);
+ *elts++ = (GLuint)(*in++) + VB->Primitive[0].basevertex;
}
else {
const GLubyte *in = (GLubyte *)ptr;
for (i = 0; i < ib->count; i++)
- *elts++ = (GLuint)(*in++);
+ *elts++ = (GLuint)(*in++) + VB->Primitive[0].basevertex;
}
}
}
@@ -390,10 +395,14 @@ void _tnl_draw_prims( GLcontext *ctx,
TNLcontext *tnl = TNL_CONTEXT(ctx);
const GLuint TEST_SPLIT = 0;
const GLint max = TEST_SPLIT ? 8 : tnl->vb.Size - MAX_CLIPPED_VERTICES;
+ GLuint max_basevertex = prim->basevertex;
+ GLuint i;
+
+ for (i = 1; i < nr_prims; i++)
+ max_basevertex = MAX2(max_basevertex, prim[i].basevertex);
if (0)
{
- GLuint i;
_mesa_printf("%s %d..%d\n", __FUNCTION__, min_index, max_index);
for (i = 0; i < nr_prims; i++)
_mesa_printf("prim %d: %s start %d count %d\n", i,
@@ -410,7 +419,7 @@ void _tnl_draw_prims( GLcontext *ctx,
_tnl_vbo_draw_prims );
return;
}
- else if (max_index > max) {
+ else if (max_index + max_basevertex > max) {
/* The software TNL pipeline has a fixed amount of storage for
* vertices and it is necessary to split incoming drawing commands
* if they exceed that limit.
@@ -424,7 +433,7 @@ void _tnl_draw_prims( GLcontext *ctx,
* recursively call back into this function.
*/
vbo_split_prims( ctx, arrays, prim, nr_prims, ib,
- 0, max_index,
+ 0, max_index + prim->basevertex,
_tnl_vbo_draw_prims,
&limits );
}
@@ -435,17 +444,34 @@ void _tnl_draw_prims( GLcontext *ctx,
struct gl_buffer_object *bo[VERT_ATTRIB_MAX + 1];
GLuint nr_bo = 0;
- /* Binding inputs may imply mapping some vertex buffer objects.
- * They will need to be unmapped below.
- */
- bind_inputs(ctx, arrays, max_index+1, bo, &nr_bo);
- bind_indices(ctx, ib, bo, &nr_bo);
- bind_prims(ctx, prim, nr_prims );
+ for (i = 0; i < nr_prims;) {
+ GLuint this_nr_prims;
+
+ /* Our SW TNL pipeline doesn't handle basevertex yet, so bind_indices
+ * will rebase the elements to the basevertex, and we'll only
+ * emit strings of prims with the same basevertex in one draw call.
+ */
+ for (this_nr_prims = 1; i + this_nr_prims < nr_prims;
+ this_nr_prims++) {
+ if (prim[i].basevertex != prim[i + this_nr_prims].basevertex)
+ break;
+ }
+
+ /* Binding inputs may imply mapping some vertex buffer objects.
+ * They will need to be unmapped below.
+ */
+ bind_prims(ctx, &prim[i], this_nr_prims);
+ bind_inputs(ctx, arrays, max_index + prim[i].basevertex + 1,
+ bo, &nr_bo);
+ bind_indices(ctx, ib, bo, &nr_bo);
- TNL_CONTEXT(ctx)->Driver.RunPipeline(ctx);
+ TNL_CONTEXT(ctx)->Driver.RunPipeline(ctx);
- unmap_vbos(ctx, bo, nr_bo);
- free_space(ctx);
+ unmap_vbos(ctx, bo, nr_bo);
+ free_space(ctx);
+
+ i += this_nr_prims;
+ }
}
}
diff --git a/src/mesa/tnl/t_rasterpos.c b/src/mesa/tnl/t_rasterpos.c
index f1fdddf0f5..99b6787455 100644
--- a/src/mesa/tnl/t_rasterpos.c
+++ b/src/mesa/tnl/t_rasterpos.c
@@ -46,11 +46,10 @@
* \return zero if outside view volume, or one if inside.
*/
static GLuint
-viewclip_point( const GLfloat v[] )
+viewclip_point_xy( const GLfloat v[] )
{
if ( v[0] > v[3] || v[0] < -v[3]
- || v[1] > v[3] || v[1] < -v[3]
- || v[2] > v[3] || v[2] < -v[3] ) {
+ || v[1] > v[3] || v[1] < -v[3] ) {
return 0;
}
else {
@@ -408,18 +407,18 @@ _tnl_RasterPos(GLcontext *ctx, const GLfloat vObj[4])
/* apply projection matrix: clip = Proj * eye */
TRANSFORM_POINT( clip, ctx->ProjectionMatrixStack.Top->m, eye );
- /* clip to view volume */
- if (ctx->Transform.RasterPositionUnclipped) {
- /* GL_IBM_rasterpos_clip: only clip against Z */
+ /* clip to view volume. */
+ if (!ctx->Transform.DepthClamp) {
if (viewclip_point_z(clip) == 0) {
ctx->Current.RasterPosValid = GL_FALSE;
return;
}
}
- else if (viewclip_point(clip) == 0) {
- /* Normal OpenGL behaviour */
- ctx->Current.RasterPosValid = GL_FALSE;
- return;
+ if (!ctx->Transform.RasterPositionUnclipped) {
+ if (viewclip_point_xy(clip) == 0) {
+ ctx->Current.RasterPosValid = GL_FALSE;
+ return;
+ }
}
/* clip to user clipping planes */
@@ -443,6 +442,12 @@ _tnl_RasterPos(GLcontext *ctx, const GLfloat vObj[4])
/ ctx->DrawBuffer->_DepthMaxF;
ctx->Current.RasterPos[3] = clip[3];
+ if (ctx->Transform.DepthClamp) {
+ ctx->Current.RasterPos[3] = CLAMP(ctx->Current.RasterPos[3],
+ ctx->Viewport.Near,
+ ctx->Viewport.Far);
+ }
+
/* compute raster distance */
if (ctx->Fog.FogCoordinateSource == GL_FOG_COORDINATE_EXT)
ctx->Current.RasterDistance = ctx->Current.Attrib[VERT_ATTRIB_FOG][0];
diff --git a/src/mesa/tnl/t_vb_cliptmp.h b/src/mesa/tnl/t_vb_cliptmp.h
index 618b8b3130..0d2183a9e6 100644
--- a/src/mesa/tnl/t_vb_cliptmp.h
+++ b/src/mesa/tnl/t_vb_cliptmp.h
@@ -80,6 +80,58 @@ do { \
} while (0)
+#define POLY_USERCLIP(PLANE) \
+do { \
+ if (mask & CLIP_USER_BIT) { \
+ GLuint idxPrev = inlist[0]; \
+ GLfloat dpPrev = VB->ClipDistancePtr[PLANE][idxPrev]; \
+ GLuint outcount = 0; \
+ GLuint i; \
+ \
+ inlist[n] = inlist[0]; /* prevent rotation of vertices */ \
+ for (i = 1; i <= n; i++) { \
+ GLuint idx = inlist[i]; \
+ GLfloat dp = VB->ClipDistancePtr[PLANE][idx]; \
+ \
+ if (!IS_NEGATIVE(dpPrev)) { \
+ outlist[outcount++] = idxPrev; \
+ } \
+ \
+ if (DIFFERENT_SIGNS(dp, dpPrev)) { \
+ if (IS_NEGATIVE(dp)) { \
+ /* Going out of bounds. Avoid division by zero as we \
+ * know dp != dpPrev from DIFFERENT_SIGNS, above. \
+ */ \
+ GLfloat t = dp / (dp - dpPrev); \
+ INTERP_4F( t, coord[newvert], coord[idx], coord[idxPrev]); \
+ interp( ctx, t, newvert, idx, idxPrev, GL_TRUE ); \
+ } else { \
+ /* Coming back in. \
+ */ \
+ GLfloat t = dpPrev / (dpPrev - dp); \
+ INTERP_4F( t, coord[newvert], coord[idxPrev], coord[idx]); \
+ interp( ctx, t, newvert, idxPrev, idx, GL_FALSE ); \
+ } \
+ outlist[outcount++] = newvert++; \
+ } \
+ \
+ idxPrev = idx; \
+ dpPrev = dp; \
+ } \
+ \
+ if (outcount < 3) \
+ return; \
+ \
+ { \
+ GLuint *tmp = inlist; \
+ inlist = outlist; \
+ outlist = tmp; \
+ n = outcount; \
+ } \
+ } \
+} while (0)
+
+
#define LINE_CLIP(PLANE_BIT, A, B, C, D ) \
do { \
if (mask & PLANE_BIT) { \
@@ -111,6 +163,37 @@ do { \
} while (0)
+#define LINE_USERCLIP(PLANE) \
+do { \
+ if (mask & CLIP_USER_BIT) { \
+ const GLfloat dp0 = VB->ClipDistancePtr[PLANE][v0]; \
+ const GLfloat dp1 = VB->ClipDistancePtr[PLANE][v1]; \
+ const GLboolean neg_dp0 = IS_NEGATIVE(dp0); \
+ const GLboolean neg_dp1 = IS_NEGATIVE(dp1); \
+ \
+ /* For regular clipping, we know from the clipmask that one \
+ * (or both) of these must be negative (otherwise we wouldn't \
+ * be here). \
+ * For userclip, there is only a single bit for all active \
+ * planes, so we can end up here when there is nothing to do, \
+ * hence the second IS_NEGATIVE() test: \
+ */ \
+ if (neg_dp0 && neg_dp1) \
+ return; /* both vertices outside clip plane: discard */ \
+ \
+ if (neg_dp1) { \
+ GLfloat t = dp1 / (dp1 - dp0); \
+ if (t > t1) t1 = t; \
+ } else if (neg_dp0) { \
+ GLfloat t = dp0 / (dp0 - dp1); \
+ if (t > t0) t0 = t; \
+ } \
+ if (t0 + t1 >= 1.0) \
+ return; /* discard */ \
+ } \
+} while (0)
+
+
/* Clip a line against the viewport and user clip planes.
*/
@@ -139,11 +222,7 @@ TAG(clip_line)( GLcontext *ctx, GLuint v0, GLuint v1, GLubyte mask )
if (mask & CLIP_USER_BIT) {
for (p = 0; p < ctx->Const.MaxClipPlanes; p++) {
if (ctx->Transform.ClipPlanesEnabled & (1 << p)) {
- const GLfloat a = ctx->Transform._ClipUserPlane[p][0];
- const GLfloat b = ctx->Transform._ClipUserPlane[p][1];
- const GLfloat c = ctx->Transform._ClipUserPlane[p][2];
- const GLfloat d = ctx->Transform._ClipUserPlane[p][3];
- LINE_CLIP( CLIP_USER_BIT, a, b, c, d );
+ LINE_USERCLIP(p);
}
}
}
@@ -228,11 +307,7 @@ TAG(clip_tri)( GLcontext *ctx, GLuint v0, GLuint v1, GLuint v2, GLubyte mask )
if (mask & CLIP_USER_BIT) {
for (p = 0; p < ctx->Const.MaxClipPlanes; p++) {
if (ctx->Transform.ClipPlanesEnabled & (1 << p)) {
- const GLfloat a = ctx->Transform._ClipUserPlane[p][0];
- const GLfloat b = ctx->Transform._ClipUserPlane[p][1];
- const GLfloat c = ctx->Transform._ClipUserPlane[p][2];
- const GLfloat d = ctx->Transform._ClipUserPlane[p][3];
- POLY_CLIP( CLIP_USER_BIT, a, b, c, d );
+ POLY_USERCLIP(p);
}
}
}
@@ -291,11 +366,7 @@ TAG(clip_quad)( GLcontext *ctx, GLuint v0, GLuint v1, GLuint v2, GLuint v3,
if (mask & CLIP_USER_BIT) {
for (p = 0; p < ctx->Const.MaxClipPlanes; p++) {
if (ctx->Transform.ClipPlanesEnabled & (1 << p)) {
- const GLfloat a = ctx->Transform._ClipUserPlane[p][0];
- const GLfloat b = ctx->Transform._ClipUserPlane[p][1];
- const GLfloat c = ctx->Transform._ClipUserPlane[p][2];
- const GLfloat d = ctx->Transform._ClipUserPlane[p][3];
- POLY_CLIP( CLIP_USER_BIT, a, b, c, d );
+ POLY_USERCLIP(p);
}
}
}
@@ -317,4 +388,6 @@ TAG(clip_quad)( GLcontext *ctx, GLuint v0, GLuint v1, GLuint v2, GLuint v3,
#undef SIZE
#undef TAG
#undef POLY_CLIP
+#undef POLY_USERCLIP
#undef LINE_CLIP
+#undef LINE_USERCLIP
diff --git a/src/mesa/tnl/t_vb_program.c b/src/mesa/tnl/t_vb_program.c
index dc954bcba1..5fb83c2b01 100644
--- a/src/mesa/tnl/t_vb_program.c
+++ b/src/mesa/tnl/t_vb_program.c
@@ -66,6 +66,7 @@ struct vp_stage_data {
GLvector4f results[VERT_RESULT_MAX];
GLvector4f ndcCoords; /**< normalized device coords */
+ GLfloat *clipdistance[MAX_CLIP_PLANES];
GLubyte *clipmask; /**< clip flags */
GLubyte ormask, andmask; /**< for clipping */
};
@@ -77,6 +78,7 @@ struct vp_stage_data {
static void
userclip( GLcontext *ctx,
GLvector4f *clip,
+ GLfloat *clipdistance[MAX_CLIP_PLANES],
GLubyte *clipmask,
GLubyte *clipormask,
GLubyte *clipandmask )
@@ -105,6 +107,8 @@ userclip( GLcontext *ctx,
clipmask[i] |= CLIP_USER_BIT;
}
+ clipdistance[p][i] = dp;
+
STRIDE_F(coord, stride);
}
@@ -131,13 +135,16 @@ do_ndc_cliptest(GLcontext *ctx, struct vp_stage_data *store)
store->ormask = 0;
store->andmask = CLIP_FRUSTUM_BITS;
+ tnl_clip_prepare(ctx);
+
if (tnl->NeedNdcCoords) {
VB->NdcPtr =
_mesa_clip_tab[VB->ClipPtr->size]( VB->ClipPtr,
&store->ndcCoords,
store->clipmask,
&store->ormask,
- &store->andmask );
+ &store->andmask,
+ !ctx->Transform.DepthClamp );
}
else {
VB->NdcPtr = NULL;
@@ -145,7 +152,8 @@ do_ndc_cliptest(GLcontext *ctx, struct vp_stage_data *store)
NULL,
store->clipmask,
&store->ormask,
- &store->andmask );
+ &store->andmask,
+ !ctx->Transform.DepthClamp );
}
if (store->andmask) {
@@ -160,6 +168,7 @@ do_ndc_cliptest(GLcontext *ctx, struct vp_stage_data *store)
ctx->VertexProgram.Current->IsPositionInvariant)) {
userclip( ctx,
VB->ClipPtr,
+ store->clipdistance,
store->clipmask,
&store->ormask,
&store->andmask );
@@ -167,6 +176,9 @@ do_ndc_cliptest(GLcontext *ctx, struct vp_stage_data *store)
if (store->andmask) {
return GL_FALSE;
}
+
+ memcpy(VB->ClipDistancePtr, store->clipdistance,
+ sizeof(store->clipdistance));
}
VB->ClipAndMask = store->andmask;
@@ -510,6 +522,10 @@ init_vp(GLcontext *ctx, struct tnl_pipeline_stage *stage)
_mesa_vector4f_alloc( &store->ndcCoords, 0, size, 32 );
store->clipmask = (GLubyte *) ALIGN_MALLOC(sizeof(GLubyte)*size, 32 );
+ for (i = 0; i < MAX_CLIP_PLANES; i++)
+ store->clipdistance[i] =
+ (GLfloat *) ALIGN_MALLOC(sizeof(GLfloat) * size, 32);
+
return GL_TRUE;
}
@@ -533,6 +549,9 @@ dtr(struct tnl_pipeline_stage *stage)
_mesa_vector4f_free( &store->ndcCoords );
ALIGN_FREE( store->clipmask );
+ for (i = 0; i < MAX_CLIP_PLANES; i++)
+ ALIGN_FREE(store->clipdistance[i]);
+
FREE( store );
stage->privatePtr = NULL;
}
diff --git a/src/mesa/tnl/t_vb_vertex.c b/src/mesa/tnl/t_vb_vertex.c
index 30aa7c4086..2a61ff1177 100644
--- a/src/mesa/tnl/t_vb_vertex.c
+++ b/src/mesa/tnl/t_vb_vertex.c
@@ -44,6 +44,7 @@ struct vertex_stage_data {
GLvector4f eye;
GLvector4f clip;
GLvector4f proj;
+ GLfloat *clipdistance[MAX_CLIP_PLANES];
GLubyte *clipmask;
GLubyte ormask;
GLubyte andmask;
@@ -56,11 +57,12 @@ struct vertex_stage_data {
/* This function implements cliptesting for user-defined clip planes.
* The clipping of primitives to these planes is implemented in
- * t_render_clip.h.
+ * t_vp_cliptmp.h.
*/
#define USER_CLIPTEST(NAME, SZ) \
static void NAME( GLcontext *ctx, \
GLvector4f *clip, \
+ GLfloat *clipdistances[MAX_CLIP_PLANES], \
GLubyte *clipmask, \
GLubyte *clipormask, \
GLubyte *clipandmask ) \
@@ -88,6 +90,8 @@ static void NAME( GLcontext *ctx, \
clipmask[i] |= CLIP_USER_BIT; \
} \
\
+ clipdistances[p][i] = dp; \
+ \
STRIDE_F(coord, stride); \
} \
\
@@ -107,8 +111,9 @@ USER_CLIPTEST(userclip3, 3)
USER_CLIPTEST(userclip4, 4)
static void (*(usercliptab[5]))( GLcontext *,
- GLvector4f *, GLubyte *,
- GLubyte *, GLubyte * ) =
+ GLvector4f *,
+ GLfloat *[MAX_CLIP_PLANES],
+ GLubyte *, GLubyte *, GLubyte * ) =
{
NULL,
NULL,
@@ -118,6 +123,22 @@ static void (*(usercliptab[5]))( GLcontext *,
};
+void
+tnl_clip_prepare(GLcontext *ctx)
+{
+ /* Neither the x86 nor sparc asm cliptest functions have been updated
+ * for ARB_depth_clamp, so force the C paths.
+ */
+ if (ctx->Transform.DepthClamp) {
+ static GLboolean c_funcs_installed = GL_FALSE;
+ if (!c_funcs_installed) {
+ init_c_cliptest();
+ c_funcs_installed = GL_TRUE;
+ }
+ }
+}
+
+
static GLboolean run_vertex_stage( GLcontext *ctx,
struct tnl_pipeline_stage *stage )
@@ -129,6 +150,8 @@ static GLboolean run_vertex_stage( GLcontext *ctx,
if (ctx->VertexProgram._Current)
return GL_TRUE;
+ tnl_clip_prepare(ctx);
+
if (ctx->_NeedEyeCoords) {
/* Separate modelview transformation:
* Use combined ModelProject to avoid some depth artifacts
@@ -173,7 +196,8 @@ static GLboolean run_vertex_stage( GLcontext *ctx,
&store->proj,
store->clipmask,
&store->ormask,
- &store->andmask );
+ &store->andmask,
+ !ctx->Transform.DepthClamp );
}
else {
VB->NdcPtr = NULL;
@@ -181,7 +205,8 @@ static GLboolean run_vertex_stage( GLcontext *ctx,
NULL,
store->clipmask,
&store->ormask,
- &store->andmask );
+ &store->andmask,
+ !ctx->Transform.DepthClamp );
}
if (store->andmask)
@@ -194,12 +219,16 @@ static GLboolean run_vertex_stage( GLcontext *ctx,
if (ctx->Transform.ClipPlanesEnabled) {
usercliptab[VB->ClipPtr->size]( ctx,
VB->ClipPtr,
+ store->clipdistance,
store->clipmask,
&store->ormask,
&store->andmask );
if (store->andmask)
return GL_FALSE;
+
+ memcpy(VB->ClipDistancePtr, store->clipdistance,
+ sizeof(store->clipdistance));
}
VB->ClipAndMask = store->andmask;
@@ -216,6 +245,7 @@ static GLboolean init_vertex_stage( GLcontext *ctx,
struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
struct vertex_stage_data *store;
GLuint size = VB->Size;
+ unsigned i;
stage->privatePtr = CALLOC(sizeof(*store));
store = VERTEX_STAGE_DATA(stage);
@@ -227,8 +257,17 @@ static GLboolean init_vertex_stage( GLcontext *ctx,
_mesa_vector4f_alloc( &store->proj, 0, size, 32 );
store->clipmask = (GLubyte *) ALIGN_MALLOC(sizeof(GLubyte)*size, 32 );
+ for (i = 0; i < MAX_CLIP_PLANES; i++)
+ store->clipdistance[i] =
+ (GLfloat *) ALIGN_MALLOC(sizeof(GLfloat) * size, 32);
if (!store->clipmask ||
+ !store->clipdistance[0] ||
+ !store->clipdistance[1] ||
+ !store->clipdistance[2] ||
+ !store->clipdistance[3] ||
+ !store->clipdistance[4] ||
+ !store->clipdistance[5] ||
!store->eye.data ||
!store->clip.data ||
!store->proj.data)
@@ -242,10 +281,16 @@ static void dtr( struct tnl_pipeline_stage *stage )
struct vertex_stage_data *store = VERTEX_STAGE_DATA(stage);
if (store) {
+ unsigned i;
+
_mesa_vector4f_free( &store->eye );
_mesa_vector4f_free( &store->clip );
_mesa_vector4f_free( &store->proj );
ALIGN_FREE( store->clipmask );
+
+ for (i = 0; i < MAX_CLIP_PLANES; i++)
+ ALIGN_FREE(store->clipdistance[i]);
+
FREE(store);
stage->privatePtr = NULL;
stage->run = init_vertex_stage;