New, unified interpretor/executor for vertex and fragment programs.

This replaces the code formerly in nvvertexec.c and s_fragprog.c.
Currently, DDX, DDY don't work.

src/mesa/shader/prog_execute.h

@@ -0,0 +1,77 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  6.5.3
+ *
+ * Copyright (C) 1999-2007  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.
+ */
+
+#ifndef PROG_EXECUTE_H
+#define PROG_EXECUTE_H
+
+
+typedef void (*FetchTexelLodFunc)(GLcontext *ctx, const GLfloat texcoord[4],
+                                  GLfloat lambda, GLuint unit, GLfloat color[4]);
+
+typedef void (*FetchTexelDerivFunc)(GLcontext *ctx, const GLfloat texcoord[4],
+                                    const GLfloat texdx[4],
+                                    const GLfloat texdy[4],
+                                    GLuint unit, GLfloat color[4]);
+
+
+/**
+ * Virtual machine state used during execution of vertex/fragment programs.
+ */
+struct gl_program_machine
+{
+   const struct gl_program *CurProgram;
+
+   /** Fragment Input attributes */
+   GLfloat (*Attribs)[MAX_WIDTH][4];
+   GLuint CurElement; /**< Index into Attribs arrays */
+
+   /** Vertex Input attribs */
+   GLfloat VertAttribs[VERT_ATTRIB_MAX][4];
+
+   GLfloat Temporaries[MAX_PROGRAM_TEMPS][4];
+   GLfloat Outputs[FRAG_RESULT_MAX][4];
+   GLuint CondCodes[4];  /**< COND_* value for x/y/z/w */
+
+   GLint AddressReg[MAX_VERTEX_PROGRAM_ADDRESS_REGS][4];
+
+   GLuint CallStack[MAX_PROGRAM_CALL_DEPTH]; /**< For CAL/RET instructions */
+   GLuint StackDepth; /**< Index/ptr to top of CallStack[] */
+
+   /** Texture fetch functions */
+   FetchTexelLodFunc FetchTexelLod;
+   FetchTexelDerivFunc FetchTexelDeriv;
+};
+
+
+extern void
+_mesa_get_program_register(GLcontext *ctx, enum register_file file,
+                           GLuint index, GLfloat val[4]);
+
+extern GLboolean
+_mesa_execute_program(GLcontext *ctx,
+                      const struct gl_program *program, GLuint maxInst,
+                      struct gl_program_machine *machine, GLuint element);
+
+
+#endif /* PROG_EXECUTE_H */