1 files changed, 116 insertions, 0 deletions
diff --git a/src/mesa/pipe/softpipe/g_headers.h b/src/mesa/pipe/softpipe/g_headers.h
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+++ b/src/mesa/pipe/softpipe/g_headers.h
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+/**************************************************************************
+ * 
+ * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * 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, sub license, 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 (including the
+ * next paragraph) 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 NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS 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>
+ */
+#ifndef G_HEADERS_H
+#define G_HEADERS_H
+
+#define PRIM_POINT 1
+#define PRIM_LINE  2
+#define PRIM_TRI   3
+
+struct prim_header {
+   GLfloat det;
+   struct vertex_header *v[3];
+};
+
+/* Carry some useful information around with the vertices in the prim
+ * pipe.  
+ */
+struct vertex_header {
+   GLuint clipmask:12;
+   GLuint edgeflag:1;
+   GLuint pad:19;
+
+   GLfloat clip[4];
+
+   GLfloat data[][4];		/* Note variable size */
+};
+
+
+
+
+
+/* The rasterizer generates 2x2 quads of fragment and feeds them to
+ * the current fp_machine (see below).  
+ */
+#define QUAD_BOTTOM_LEFT  0
+#define QUAD_BOTTOM_RIGHT 1
+#define QUAD_TOP_LEFT     2
+#define QUAD_TOP_RIGHT    3
+#define QUAD_SIZE        (2*2)
+
+#define MASK_BOTTOM_LEFT  0x1
+#define MASK_BOTTOM_RIGHT 0x2
+#define MASK_TOP_LEFT     0x4
+#define MASK_TOP_RIGHT    0x8
+#define MASK_ALL          0xf
+
+
+#define NUM_CHANNELS   4	/* avoid confusion between 4 pixels and 4 channels */
+
+
+struct setup_coefficient {
+   GLfloat a0[NUM_CHANNELS];	/* in an xyzw layout */
+   GLfloat dadx[NUM_CHANNELS];
+   GLfloat dady[NUM_CHANNELS];
+};
+
+
+
+/* Encodes everything we need to know about a 2x2 pixel block.  Uses
+ * "Channel-Serial" or "SoA" layout.  
+ *
+ * Will expand to include non-attribute things like AA coverage and
+ * maybe prefetched depth from the depth buffer.
+ */
+struct quad_header {
+   GLint x0;
+   GLint y0;
+   GLuint mask;
+   GLuint facing;   /**< Front or back facing? */
+
+   struct {
+      GLfloat color[4][QUAD_SIZE];	/* rrrr, gggg, bbbb, aaaa */
+      GLfloat depth[QUAD_SIZE];
+   } outputs;
+
+   const struct setup_coefficient *coef;
+
+   const enum interp_mode *interp; /* XXX: this information should be
+				    * encoded in fragment program DECL
+				    * statements. */
+
+   GLuint nr_attrs;
+};
+
+
+
+
+
+#endif