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src/mesa/tnl/t_vb_arbprogram.h

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+/*
+ * Mesa 3-D graphics library
+ * Version:  6.3
+ *
+ * Copyright (C) 1999-2004  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.
+ */
+
+/**
+ * \file t_arb_program.c
+ * Compile vertex programs to an intermediate representation.
+ * Execute vertex programs over a buffer of vertices.
+ * \author Keith Whitwell, Brian Paul
+ */
+
+
+#ifndef _T_VB_ARBPROGRAM_H_
+#define _T_VB_ARBPROGRAM_H_
+
+
+/* New, internal instructions:
+ */
+#define RSW        (VP_MAX_OPCODE)
+#define MSK        (VP_MAX_OPCODE+1)
+#define REL        (VP_MAX_OPCODE+2)
+
+
+/* Layout of register file:
+
+  0 -- Scratch (Arg0)
+  1 -- Scratch (Arg1)
+  2 -- Scratch (Result)
+  4 -- Program Temporary 0
+  16 -- Program Temporary 12 (max for NV_VERTEX_PROGRAM)
+  17 -- Output 0
+  31 -- Output 15 (max for NV_VERTEX_PROGRAM) (Last writeable register)
+  32 -- Parameter 0
+  ..
+  127 -- Parameter 63 (max for NV_VERTEX_PROGRAM)
+
+*/
+
+#define FILE_REG         0
+#define FILE_LOCAL_PARAM 1
+#define FILE_ENV_PARAM   2
+#define FILE_STATE_PARAM 3
+
+
+#define REG_ARG0   0
+#define REG_ARG1   1
+#define REG_ARG2   2
+#define REG_RES    3
+#define REG_ADDR   4
+#define REG_TMP0   5
+#define REG_TMP11  16
+#define REG_OUT0   17
+#define REG_OUT14  31
+#define REG_IN0    32
+#define REG_IN15   47
+#define REG_ID     48		/* 0,0,0,1 */
+#define REG_MAX    128
+#define REG_INVALID ~0
+
+/* ARB_vp instructions are broken down into one or more of the
+ * following micro-instructions, each representable in a 32 bit packed
+ * structure.
+ */
+
+struct reg {
+   GLuint file:2;
+   GLuint idx:7;
+};
+
+
+union instruction {
+   struct {
+      GLuint opcode:6;
+      GLuint dst:5;
+      GLuint file0:2;
+      GLuint idx0:7;
+      GLuint file1:2;
+      GLuint idx1:7;
+      GLuint pad:3;
+   } alu;
+
+   struct {
+      GLuint opcode:6;
+      GLuint dst:5;
+      GLuint file0:2;
+      GLuint idx0:7;
+      GLuint neg:4;
+      GLuint swz:8;		/* xyzw only */
+   } rsw;
+
+   struct {
+      GLuint opcode:6;
+      GLuint dst:5;
+      GLuint file:2;
+      GLuint idx:7;
+      GLuint mask:4;
+      GLuint pad:1;
+   } msk;
+
+   GLuint dword;
+};
+
+#define RSW_NOOP ((0<<0) | (1<<2) | (2<<4) | (3<<6))
+#define GET_RSW(swz, idx)      (((swz) >> ((idx)*2)) & 0x3)
+
+
+
+struct compilation {
+   GLuint reg_active;
+   union instruction *csr;
+   struct vertex_buffer *VB;	/* for input sizes! */
+};
+
+struct input {
+   GLuint idx;
+   GLfloat *data;
+   GLuint stride;
+   GLuint size;
+};
+
+struct output {
+   GLuint idx;
+   GLfloat *data;
+};
+
+/*--------------------------------------------------------------------------- */
+
+/*!
+ * Private storage for the vertex program pipeline stage.
+ */
+struct arb_vp_machine {
+   GLfloat reg[REG_MAX][4];	/* Program temporaries, inputs and outputs */
+   GLfloat (*File[4])[4];	/* All values reference-able from the program. */
+   GLint AddressReg;
+
+   struct input input[16];
+   GLuint nr_inputs;
+
+   struct output output[15];
+   GLuint nr_outputs;
+
+   union instruction store[1024];
+   union instruction *instructions;
+   GLint nr_instructions;
+
+   GLvector4f attribs[VERT_RESULT_MAX]; /**< result vectors. */
+   GLvector4f ndcCoords;              /**< normalized device coords */
+   GLubyte *clipmask;                 /**< clip flags */
+   GLubyte ormask, andmask;           /**< for clipping */
+
+   GLuint vtx_nr;		/**< loop counter */
+
+   struct vertex_buffer *VB;
+   GLcontext *ctx;
+};
+
+
+#endif