src/mesa/shader/arbvertparse.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  6.5
   4  *
   5  * Copyright (C) 1999-2005  Brian Paul   All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 #define DEBUG_VP 0
  26
  27 /**
  28  * \file arbvertparse.c
  29  * ARB_vertex_program parser.
  30  * \author Karl Rasche
  31  */
  32
  33 #include "glheader.h"
  34 #include "imports.h"
  35 #include "program.h"
  36 #include "arbprogparse.h"
  37 #include "arbvertparse.h"
  38
  39
  40 /**
  41  * Parse the vertex program string.  If success, update the given
  42  * vertex_program object with the new program.  Else, leave the vertex_program
  43  * object unchanged.
  44  */
  45 void
  46 _mesa_parse_arb_vertex_program(GLcontext * ctx, GLenum target,
  47                                const GLubyte * str, GLsizei len,
  48                                struct vertex_program *program)
  49 {
  50    struct arb_program ap;
  51    (void) target;
  52    struct prog_instruction *newInstructions;
  53
  54    /* set the program target before parsing */
  55    ap.Base.Target = GL_VERTEX_PROGRAM_ARB;
  56
  57    if (!_mesa_parse_arb_program(ctx, str, len, &ap)) {
  58       /* Error in the program. Just return. */
  59       return;
  60    }
  61
  62    /* Copy the relevant contents of the arb_program struct into the
  63     * vertex_program struct.
  64     */
  65    /* copy instruction buffer */
  66    newInstructions = (struct prog_instruction *)
  67       _mesa_malloc(ap.Base.NumInstructions * sizeof(struct prog_instruction));
  68    if (!newInstructions) {
  69       _mesa_error(ctx, GL_OUT_OF_MEMORY, "glProgramStringARB");
  70       return;
  71    }
  72    _mesa_memcpy(newInstructions, ap.VPInstructions,
  73                 ap.Base.NumInstructions * sizeof(struct prog_instruction));
  74    if (program->Base.Instructions)
  75       _mesa_free(program->Base.Instructions);
  76    program->Base.Instructions = newInstructions;
  77    program->Base.String          = ap.Base.String;
  78    program->Base.NumInstructions = ap.Base.NumInstructions;
  79    program->Base.NumTemporaries  = ap.Base.NumTemporaries;
  80    program->Base.NumParameters   = ap.Base.NumParameters;
  81    program->Base.NumAttributes   = ap.Base.NumAttributes;
  82    program->Base.NumAddressRegs  = ap.Base.NumAddressRegs;
  83    program->IsPositionInvariant = ap.HintPositionInvariant;
  84    program->Base.InputsRead     = ap.Base.InputsRead;
  85    program->Base.OutputsWritten = ap.Base.OutputsWritten;
  86
  87    if (program->Base.Parameters) {
  88       /* free previous program's parameters */
  89       _mesa_free_parameter_list(program->Base.Parameters);
  90    }
  91    program->Base.Parameters = ap.Base.Parameters;
  92
  93 #if DEBUG_VP
  94    _mesa_print_program(&program->Base);
  95 #endif
  96 }