svn merge ^/branches/released . --username marha

1 files changed, 264 insertions, 0 deletions

diff --git a/mesalib/src/mesa/tnl/t_vb_vertex.c b/mesalib/src/mesa/tnl/t_vb_vertex.c
new file mode 100644
index 000000000..30aa7c408
--- /dev/null
+++ b/mesalib/src/mesa/tnl/t_vb_vertex.c
@@ -0,0 +1,264 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  6.5
+ *
+ * Copyright (C) 1999-2006  Brian Paul   All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Keith Whitwell <keith@tungstengraphics.com>
+ */
+
+
+#include "main/glheader.h"
+#include "main/colormac.h"
+#include "main/context.h"
+#include "main/macros.h"
+#include "main/imports.h"
+#include "main/mtypes.h"
+
+#include "math/m_xform.h"
+
+#include "t_context.h"
+#include "t_pipeline.h"
+
+
+
+struct vertex_stage_data {
+   GLvector4f eye;
+   GLvector4f clip;
+   GLvector4f proj;
+   GLubyte *clipmask;
+   GLubyte ormask;
+   GLubyte andmask;
+};
+
+#define VERTEX_STAGE_DATA(stage) ((struct vertex_stage_data *)stage->privatePtr)
+
+
+
+
+/* This function implements cliptesting for user-defined clip planes.
+ * The clipping of primitives to these planes is implemented in
+ * t_render_clip.h.
+ */
+#define USER_CLIPTEST(NAME, SZ)					\
+static void NAME( GLcontext *ctx,				\
+		  GLvector4f *clip,				\
+		  GLubyte *clipmask,				\
+		  GLubyte *clipormask,				\
+		  GLubyte *clipandmask )			\
+{								\
+   GLuint p;							\
+								\
+   for (p = 0; p < ctx->Const.MaxClipPlanes; p++)		\
+      if (ctx->Transform.ClipPlanesEnabled & (1 << p)) {	\
+	 GLuint nr, i;						\
+	 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];	\
+         GLfloat *coord = (GLfloat *)clip->data;		\
+         GLuint stride = clip->stride;				\
+         GLuint count = clip->count;				\
+								\
+	 for (nr = 0, i = 0 ; i < count ; i++) {		\
+	    GLfloat dp = coord[0] * a + coord[1] * b;		\
+	    if (SZ > 2) dp += coord[2] * c;			\
+	    if (SZ > 3) dp += coord[3] * d; else dp += d;	\
+								\
+	    if (dp < 0) {					\
+	       nr++;						\
+	       clipmask[i] |= CLIP_USER_BIT;			\
+	    }							\
+								\
+	    STRIDE_F(coord, stride);				\
+	 }							\
+								\
+	 if (nr > 0) {						\
+	    *clipormask |= CLIP_USER_BIT;			\
+	    if (nr == count) {					\
+	       *clipandmask |= CLIP_USER_BIT;			\
+	       return;						\
+	    }							\
+	 }							\
+      }								\
+}
+
+
+USER_CLIPTEST(userclip2, 2)
+USER_CLIPTEST(userclip3, 3)
+USER_CLIPTEST(userclip4, 4)
+
+static void (*(usercliptab[5]))( GLcontext *,
+				 GLvector4f *, GLubyte *,
+				 GLubyte *, GLubyte * ) =
+{
+   NULL,
+   NULL,
+   userclip2,
+   userclip3,
+   userclip4
+};
+
+
+
+static GLboolean run_vertex_stage( GLcontext *ctx,
+				   struct tnl_pipeline_stage *stage )
+{
+   struct vertex_stage_data *store = (struct vertex_stage_data *)stage->privatePtr;
+   TNLcontext *tnl = TNL_CONTEXT(ctx);
+   struct vertex_buffer *VB = &tnl->vb;
+
+   if (ctx->VertexProgram._Current) 
+      return GL_TRUE;
+
+   if (ctx->_NeedEyeCoords) {
+      /* Separate modelview transformation:
+       * Use combined ModelProject to avoid some depth artifacts
+       */
+      if (ctx->ModelviewMatrixStack.Top->type == MATRIX_IDENTITY)
+	 VB->EyePtr = VB->ObjPtr;
+      else
+	 VB->EyePtr = TransformRaw( &store->eye,
+				    ctx->ModelviewMatrixStack.Top,
+				    VB->ObjPtr);
+   }
+
+   VB->ClipPtr = TransformRaw( &store->clip,
+			       &ctx->_ModelProjectMatrix,
+			       VB->ObjPtr );
+
+   /* Drivers expect this to be clean to element 4...
+    */
+   switch (VB->ClipPtr->size) {
+   case 1:			
+      /* impossible */
+   case 2:
+      _mesa_vector4f_clean_elem( VB->ClipPtr, VB->Count, 2 );
+      /* fall-through */
+   case 3:
+      _mesa_vector4f_clean_elem( VB->ClipPtr, VB->Count, 3 );
+      /* fall-through */
+   case 4:
+      break;
+   }
+
+
+   /* Cliptest and perspective divide.  Clip functions must clear
+    * the clipmask.
+    */
+   store->ormask = 0;
+   store->andmask = CLIP_FRUSTUM_BITS;
+
+   if (tnl->NeedNdcCoords) {
+      VB->NdcPtr =
+	 _mesa_clip_tab[VB->ClipPtr->size]( VB->ClipPtr,
+					    &store->proj,
+					    store->clipmask,
+					    &store->ormask,
+					    &store->andmask );
+   }
+   else {
+      VB->NdcPtr = NULL;
+      _mesa_clip_np_tab[VB->ClipPtr->size]( VB->ClipPtr,
+					    NULL,
+					    store->clipmask,
+					    &store->ormask,
+					    &store->andmask );
+   }
+
+   if (store->andmask)
+      return GL_FALSE;
+
+
+   /* Test userclip planes.  This contributes to VB->ClipMask, so
+    * is essentially required to be in this stage.
+    */
+   if (ctx->Transform.ClipPlanesEnabled) {
+      usercliptab[VB->ClipPtr->size]( ctx,
+				      VB->ClipPtr,
+				      store->clipmask,
+				      &store->ormask,
+				      &store->andmask );
+
+      if (store->andmask)
+	 return GL_FALSE;
+   }
+
+   VB->ClipAndMask = store->andmask;
+   VB->ClipOrMask = store->ormask;
+   VB->ClipMask = store->clipmask;
+
+   return GL_TRUE;
+}
+
+
+static GLboolean init_vertex_stage( GLcontext *ctx,
+				    struct tnl_pipeline_stage *stage )
+{
+   struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb;
+   struct vertex_stage_data *store;
+   GLuint size = VB->Size;
+
+   stage->privatePtr = CALLOC(sizeof(*store));
+   store = VERTEX_STAGE_DATA(stage);
+   if (!store)
+      return GL_FALSE;
+
+   _mesa_vector4f_alloc( &store->eye, 0, size, 32 );
+   _mesa_vector4f_alloc( &store->clip, 0, size, 32 );
+   _mesa_vector4f_alloc( &store->proj, 0, size, 32 );
+
+   store->clipmask = (GLubyte *) ALIGN_MALLOC(sizeof(GLubyte)*size, 32 );
+
+   if (!store->clipmask ||
+       !store->eye.data ||
+       !store->clip.data ||
+       !store->proj.data)
+      return GL_FALSE;
+
+   return GL_TRUE;
+}
+
+static void dtr( struct tnl_pipeline_stage *stage )
+{
+   struct vertex_stage_data *store = VERTEX_STAGE_DATA(stage);
+
+   if (store) {
+      _mesa_vector4f_free( &store->eye );
+      _mesa_vector4f_free( &store->clip );
+      _mesa_vector4f_free( &store->proj );
+      ALIGN_FREE( store->clipmask );
+      FREE(store);
+      stage->privatePtr = NULL;
+      stage->run = init_vertex_stage;
+   }
+}
+
+
+const struct tnl_pipeline_stage _tnl_vertex_transform_stage =
+{
+   "modelview/project/cliptest/divide",
+   NULL,			/* private data */
+   init_vertex_stage,
+   dtr,				/* destructor */
+   NULL,
+   run_vertex_stage		/* run -- initially set to init */
+};