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, 173 insertions, 0 deletions

diff --git a/src/mesa/swrast_setup/ss_vb.c b/src/mesa/swrast_setup/ss_vb.c
new file mode 100644
index 0000000000..7f8fbdfdc5
--- /dev/null
+++ b/src/mesa/swrast_setup/ss_vb.c
@@ -0,0 +1,173 @@
+/*
+ * 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 <keithw@valinux.com>
+ */
+
+#include "glheader.h"
+#include "macros.h"
+#include "stages.h"
+
+#include "swrast/swrast.h"
+
+#include "ss_context.h"
+#include "ss_vb.h"
+
+
+
+/* Provides a RasterSetup function which prebuilds vertices for the
+ * software rasterizer.  This is required for the triangle functions
+ * in this module, but not the rest of the swrast module.
+ */
+
+typedef void (*SetupFunc)( struct vertex_buffer *VB, 
+				 GLuint start, GLuint end );
+
+#define COLOR         0x1
+#define INDEX         0x2
+#define TEX0          0x4
+#define MULTITEX      0x8
+#define SPEC          0x10
+#define FOG           0x20
+#define EYE           0x40
+#define MAX_SETUPFUNC 0x80
+
+static SetupFunc setup_func[MAX_SETUPFUNC];
+
+
+#define IND (COLOR)
+#define TAG(x) x##_color
+#include "ss_vbtmp.h"
+
+#define IND (INDEX)
+#define TAG(x) x##_index
+#include "ss_vbtmp.h"
+
+#define IND (TEX0|COLOR)
+#define TAG(x) x##_tex0_color
+#include "ss_vbtmp.h"
+
+#define IND (TEX0|COLOR|SPEC)
+#define TAG(x) x##_tex0_color_spec
+#include "ss_vbtmp.h"
+
+#define IND (TEX0|COLOR|SPEC|FOG)
+#define TAG(x) x##_tex0_color_spec_fog
+#include "ss_vbtmp.h"
+
+#define IND (MULTITEX|COLOR)
+#define TAG(x) x##_multitex_color
+#include "ss_vbtmp.h"
+
+#define IND (MULTITEX|COLOR|SPEC|FOG)
+#define TAG(x) x##_multitex_color_spec_fog
+#include "ss_vbtmp.h"
+
+#define IND (TEX0|COLOR|EYE)
+#define TAG(x) x##_tex0_color_eye
+#include "ss_vbtmp.h"
+
+#define IND (MULTITEX|COLOR|SPEC|INDEX|EYE|FOG)
+#define TAG(x) x##_multitex_color_spec_index_eye_fog
+#include "ss_vbtmp.h"
+
+
+
+void 
+_swsetup_vb_init( GLcontext *ctx )
+{
+   int i;
+   (void) ctx;
+
+   for (i = 0 ; i < Elements(setup_func) ; i++)
+      setup_func[i] = rs_multitex_color_spec_index_eye_fog;
+
+   /* Some specialized cases:
+    */
+   setup_func[0]     = rs_color;
+   setup_func[COLOR] = rs_color;
+
+   setup_func[INDEX] = rs_index;
+   
+   setup_func[TEX0]       = rs_tex0_color;
+   setup_func[TEX0|COLOR] = rs_tex0_color;
+
+   setup_func[SPEC]            = rs_tex0_color_spec;
+   setup_func[COLOR|SPEC]      = rs_tex0_color_spec;
+   setup_func[TEX0|SPEC]       = rs_tex0_color_spec;
+   setup_func[TEX0|COLOR|SPEC] = rs_tex0_color_spec;
+
+   setup_func[MULTITEX]       = rs_multitex_color;
+   setup_func[MULTITEX|COLOR] = rs_multitex_color;
+
+   setup_func[FOG]                      = rs_tex0_color_spec_fog;
+   setup_func[COLOR|FOG]                = rs_tex0_color_spec_fog;
+   setup_func[SPEC|FOG]                 = rs_tex0_color_spec_fog;
+   setup_func[COLOR|SPEC|FOG]           = rs_tex0_color_spec_fog;
+   setup_func[TEX0|FOG]                 = rs_tex0_color_spec_fog;
+   setup_func[TEX0|COLOR|FOG]           = rs_tex0_color_spec_fog;
+   setup_func[TEX0|SPEC|FOG]            = rs_tex0_color_spec_fog;
+   setup_func[TEX0|COLOR|SPEC|FOG]      = rs_tex0_color_spec_fog;
+
+   setup_func[MULTITEX|SPEC]            = rs_multitex_color_spec_fog;
+   setup_func[MULTITEX|COLOR|SPEC]      = rs_multitex_color_spec_fog;
+   setup_func[MULTITEX|FOG]             = rs_multitex_color_spec_fog;
+   setup_func[MULTITEX|SPEC|FOG]        = rs_multitex_color_spec_fog;
+   setup_func[MULTITEX|COLOR|SPEC|FOG]  = rs_multitex_color_spec_fog;
+
+   setup_func[TEX0|EYE]       = rs_tex0_color_eye;
+   setup_func[TEX0|COLOR|EYE] = rs_tex0_color_eye;
+}
+
+
+void 
+_swsetup_choose_rastersetup_func(GLcontext *ctx)
+{
+   SScontext *swsetup = SWSETUP_CONTEXT(ctx);
+   int funcindex;
+
+   if (ctx->Visual.RGBAflag) {
+      funcindex = COLOR;
+
+      if (ctx->Texture._ReallyEnabled & ~0xf) 
+	 funcindex |= MULTITEX;
+      else if (ctx->Texture._ReallyEnabled & 0xf) 
+	 funcindex |= TEX0;
+
+      if (ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR ||
+	  ctx->Fog.ColorSumEnabled)
+	 funcindex |= SPEC;
+
+      if (ctx->Point._Attenuated)
+	 funcindex |= EYE;
+   }
+   else
+      funcindex = INDEX;
+
+   if (ctx->RenderMode != GL_RENDER)
+      funcindex = (INDEX|COLOR|MULTITEX);
+  
+   swsetup->RasterSetup = setup_func[funcindex];
+}
+