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, 161 insertions, 0 deletions

diff --git a/src/mesa/swrast_setup/ss_triangle.c b/src/mesa/swrast_setup/ss_triangle.c
new file mode 100644
index 00000000000..992bc4f396a
--- /dev/null
+++ b/src/mesa/swrast_setup/ss_triangle.c
@@ -0,0 +1,161 @@
+/*
+ * 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 "macros.h"
+#include "types.h"
+
+#include "ss_triangle.h"
+#include "ss_context.h"
+
+#define SS_FLAT_BIT	    0x1
+#define SS_OFFSET_BIT	    0x2	
+#define SS_TWOSIDE_BIT	    0x4	
+#define SS_UNFILLED_BIT	    0x10	
+#define SS_MAX_TRIFUNC      0x20
+
+static triangle_func tri_tab[SS_MAX_TRIFUNC];
+static line_func     line_tab[SS_MAX_TRIFUNC];
+static points_func   points_tab[SS_MAX_TRIFUNC];
+static quad_func     quad_tab[SS_MAX_TRIFUNC];
+
+
+#define SS_COLOR(a,b) COPY_4UBV(a,b)
+#define SS_SPEC(a,b) COPY_4UBV(a,b)
+#define SS_IND(a,b) (a = b)
+
+#define IND (0)
+#define TAG(x) x
+#include "ss_tritmp.h"
+
+#define IND (SS_FLAT_BIT)
+#define TAG(x) x##_flat
+#include "ss_tritmp.h"
+
+#define IND (SS_OFFSET_BIT)
+#define TAG(x) x##_offset
+#include "ss_tritmp.h"
+
+#define IND (SS_FLAT_BIT|SS_OFFSET_BIT)
+#define TAG(x) x##_flat_offset
+#include "ss_tritmp.h"
+
+#define IND (SS_TWOSIDE_BIT)
+#define TAG(x) x##_twoside
+#include "ss_tritmp.h"
+
+#define IND (SS_FLAT_BIT|SS_TWOSIDE_BIT)
+#define TAG(x) x##_flat_twoside
+#include "ss_tritmp.h"
+
+#define IND (SS_OFFSET_BIT|SS_TWOSIDE_BIT)
+#define TAG(x) x##_offset_twoside
+#include "ss_tritmp.h"
+
+#define IND (SS_FLAT_BIT|SS_OFFSET_BIT|SS_TWOSIDE_BIT)
+#define TAG(x) x##_flat_offset_twoside
+#include "ss_tritmp.h"
+
+#define IND (SS_UNFILLED_BIT)
+#define TAG(x) x##_unfilled
+#include "ss_tritmp.h"
+
+#define IND (SS_FLAT_BIT|SS_UNFILLED_BIT)
+#define TAG(x) x##_flat_unfilled
+#include "ss_tritmp.h"
+
+#define IND (SS_OFFSET_BIT|SS_UNFILLED_BIT)
+#define TAG(x) x##_offset_unfilled
+#include "ss_tritmp.h"
+
+#define IND (SS_FLAT_BIT|SS_OFFSET_BIT|SS_UNFILLED_BIT)
+#define TAG(x) x##_flat_offset_unfilled
+#include "ss_tritmp.h"
+
+#define IND (SS_TWOSIDE_BIT|SS_UNFILLED_BIT)
+#define TAG(x) x##_twoside_unfilled
+#include "ss_tritmp.h"
+
+#define IND (SS_FLAT_BIT|SS_TWOSIDE_BIT|SS_UNFILLED_BIT)
+#define TAG(x) x##_flat_twoside_unfilled
+#include "ss_tritmp.h"
+
+#define IND (SS_OFFSET_BIT|SS_TWOSIDE_BIT|SS_UNFILLED_BIT)
+#define TAG(x) x##_offset_twoside_unfilled
+#include "ss_tritmp.h"
+
+#define IND (SS_FLAT_BIT|SS_OFFSET_BIT|SS_TWOSIDE_BIT|SS_UNFILLED_BIT)
+#define TAG(x) x##_flat_offset_twoside_unfilled
+#include "ss_tritmp.h"
+
+
+void _swsetup_trifuncs_init( GLcontext *ctx )
+{
+   (void) ctx;
+
+   init();
+   init_flat();
+   init_offset();
+   init_flat_offset();
+   init_twoside();
+   init_flat_twoside();
+   init_offset_twoside();
+   init_flat_offset_twoside();
+   init_unfilled();
+   init_flat_unfilled();
+   init_offset_unfilled();
+   init_flat_offset_unfilled();
+   init_twoside_unfilled();
+   init_flat_twoside_unfilled();
+   init_offset_twoside_unfilled();
+   init_flat_offset_twoside_unfilled();
+}
+
+
+void _swsetup_choose_trifuncs( GLcontext *ctx )
+{
+   SScontext *swsetup = SWSETUP_CONTEXT(ctx);
+   GLuint ind = 0;
+
+   if (ctx->Light.ShadeModel == GL_FLAT)
+      ind |= SS_FLAT_BIT;
+
+   if (ctx->Polygon._OffsetAny)
+      ind |= SS_OFFSET_BIT;
+
+   if (ctx->Light.Enabled && ctx->Light.Model.TwoSide)
+      ind |= SS_TWOSIDE_BIT;
+   
+   if (ctx->Polygon._Unfilled) 
+      ind |= SS_UNFILLED_BIT;
+
+   swsetup->Triangle = tri_tab[ind];
+   swsetup->Line = line_tab[ind];
+   swsetup->Points = points_tab[ind];
+   swsetup->Quad = quad_tab[ind];
+}
+