A new module to provide RasterSetup and advanced triangle/line/point

functionality layered on top of the software rasterizer.

An example entrypoint:
	void _swsetup_Triangle( GLcontext, GLuint, GLuint, GLuint, GLuint )

will coerce the software rasterizer to draw flat, twoside-lit,
unfilled and offset triangles (including decomposition to points or lines).

1 files changed, 230 insertions, 0 deletions

diff --git a/src/mesa/swrast_setup/ss_context.c b/src/mesa/swrast_setup/ss_context.c
new file mode 100644
index 00000000000..4809e6f3286
--- /dev/null
+++ b/src/mesa/swrast_setup/ss_context.c
@@ -0,0 +1,230 @@
+/* $Id: ss_context.c,v 1.1 2000/11/05 18:20:18 keithw Exp $ */
+
+/*
+ * Mesa 3-D graphics library
+ * Version:  3.5
+ * 
+ * Copyright (C) 1999  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 <[email protected]>
+ */
+
+
+#include "glheader.h"
+#include "mem.h"
+
+
+#include "ss_context.h"
+#include "ss_triangle.h"
+#include "ss_vb.h"
+
+#include "swrast_setup.h"
+
+
+/* Stub for swsetup->Triangle to select a true triangle function 
+ * after a state change.
+ */
+static void 
+_swsetup_validate_quad( GLcontext *ctx, GLuint v0, GLuint v1, 
+			GLuint v2, GLuint v3, GLuint pv )
+{
+   _swsetup_choose_trifuncs( ctx );
+   SWSETUP_CONTEXT(ctx)->Quad( ctx, v0, v1, v2, v3, pv );
+}
+
+static void 
+_swsetup_validate_triangle( GLcontext *ctx, GLuint v0, GLuint v1, 
+			    GLuint v2, GLuint pv )
+{
+   _swsetup_choose_trifuncs( ctx );
+   SWSETUP_CONTEXT(ctx)->Triangle( ctx, v0, v1, v2, pv );
+}
+
+static void 
+_swsetup_validate_line( GLcontext *ctx, GLuint v0, GLuint v1, GLuint pv )
+{
+   _swsetup_choose_trifuncs( ctx );
+   SWSETUP_CONTEXT(ctx)->Line( ctx, v0, v1, pv );
+}
+
+
+static void 
+_swsetup_validate_points( GLcontext *ctx, GLuint first, GLuint last )
+{
+   _swsetup_choose_trifuncs( ctx );
+   SWSETUP_CONTEXT(ctx)->Points( ctx, first, last );
+}
+
+
+
+static void 
+_swsetup_validate_rastersetup( struct vertex_buffer *VB,
+			       GLuint start, GLuint end )
+{
+   GLcontext *ctx = VB->ctx;
+   _swsetup_choose_rastersetup_func( ctx );
+   SWSETUP_CONTEXT(ctx)->RasterSetup( VB, start, end );
+}
+
+
+#define _SWSETUP_NEW_RASTERSETUP (_NEW_RENDERMODE|	\
+			          _NEW_TEXTURE|		\
+			          _NEW_COLOR|		\
+			          _NEW_FOG|		\
+			          _NEW_POINT)
+
+#define _SWSETUP_NEW_RENDERINDEX (_NEW_POLYGON|_NEW_LIGHT)
+
+
+#if 0
+/* TODO: sleep/wakeup mechanism
+ */
+static void
+_swsetup_sleep( GLcontext *ctx, GLuint new_state )
+{
+}
+#endif
+
+static void
+_swsetup_invalidate_state( GLcontext *ctx, GLuint new_state )
+{
+   SScontext *swsetup = SWSETUP_CONTEXT(ctx);
+
+   swsetup->NewState |= new_state;
+
+   
+   if (new_state & _SWSETUP_NEW_RENDERINDEX) {
+      swsetup->Triangle = _swsetup_validate_triangle;
+      swsetup->Line = _swsetup_validate_line;
+      swsetup->Points = _swsetup_validate_points;
+      swsetup->Quad = _swsetup_validate_quad;
+   }
+
+   if (new_state & _SWSETUP_NEW_RASTERSETUP) {
+      swsetup->RasterSetup = _swsetup_validate_rastersetup;
+   }
+}
+
+
+
+/* Dispatch from these fixed entrypoints to the state-dependent
+ * functions:
+ */
+void 
+_swsetup_Quad( GLcontext *ctx, GLuint v0, GLuint v1, 
+	       GLuint v2, GLuint v3, GLuint pv )
+{
+   SWSETUP_CONTEXT(ctx)->Quad( ctx, v0, v1, v2, v3, pv );
+}
+
+void 
+_swsetup_Triangle( GLcontext *ctx, GLuint v0, GLuint v1, 
+		   GLuint v2, GLuint pv )
+{
+   SWSETUP_CONTEXT(ctx)->Triangle( ctx, v0, v1, v2, pv );
+}
+
+void 
+_swsetup_Line( GLcontext *ctx, GLuint v0, GLuint v1, GLuint pv )
+{
+   SWSETUP_CONTEXT(ctx)->Line( ctx, v0, v1, pv );
+}
+
+
+void 
+_swsetup_Points( GLcontext *ctx, GLuint first, GLuint last )
+{
+   SWSETUP_CONTEXT(ctx)->Points( ctx, first, last );
+}
+
+void 
+_swsetup_RasterSetup( struct vertex_buffer *VB, GLuint start, GLuint end )
+{
+   SWSETUP_CONTEXT(VB->ctx)->RasterSetup( VB, start, end );
+}
+
+void
+_swsetup_InvalidateState( GLcontext *ctx, GLuint new_state )
+{
+   SWSETUP_CONTEXT(ctx)->InvalidateState( ctx, new_state );
+}
+
+
+GLboolean
+_swsetup_CreateContext( GLcontext *ctx )
+{
+   SScontext *swsetup = (SScontext *)CALLOC(sizeof(SScontext));
+
+   if (!swsetup) 
+      return GL_FALSE;
+
+   ctx->swsetup_context = swsetup;
+
+   swsetup->NewState = ~0;
+   swsetup->InvalidateState = _swsetup_invalidate_state;
+   swsetup->Quad = _swsetup_validate_quad;
+   swsetup->Triangle = _swsetup_validate_triangle;
+   swsetup->Line = _swsetup_validate_line;
+   swsetup->Points = _swsetup_validate_points;
+   swsetup->RasterSetup = _swsetup_validate_rastersetup;
+   
+   _swsetup_vb_init( ctx );
+   _swsetup_trifuncs_init( ctx );
+   
+   return GL_TRUE;
+}
+
+void
+_swsetup_DestroyContext( GLcontext *ctx )
+{
+   if (SWSETUP_CONTEXT(ctx)) {
+      FREE(SWSETUP_CONTEXT(ctx));
+      ctx->swsetup_context = 0;
+   }
+}
+
+GLboolean 
+_swsetup_RegisterVB( struct vertex_buffer *VB )
+{
+   SSvertexbuffer *ssvb = (SSvertexbuffer *)CALLOC(sizeof(SSvertexbuffer) );
+
+   ssvb->verts = ALIGN_MALLOC( sizeof(SWvertex) * VB->Size, 32);
+   if (!ssvb->verts) {
+      FREE(ssvb);
+      return GL_FALSE;
+   }
+
+   VB->swsetup_vb = ssvb;
+   return GL_TRUE;
+}
+
+
+void 
+_swsetup_UnregisterVB( struct vertex_buffer *VB )
+{
+   SSvertexbuffer *ssvb = SWSETUP_VB(VB);
+   
+   if (ssvb) {
+      if (ssvb->verts) ALIGN_FREE(ssvb->verts);
+      FREE(ssvb);
+      VB->swsetup_vb = 0;
+   }      
+}