src/mesa/main/api_validate.c

   1 /* $Id: api_validate.c,v 1.5 2001/03/12 00:48:37 gareth Exp $ */
   2
   3 /*
   4  * Mesa 3-D graphics library
   5  * Version:  3.5
   6  *
   7  * Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a
  10  * copy of this software and associated documentation files (the "Software"),
  11  * to deal in the Software without restriction, including without limitation
  12  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  13  * and/or sell copies of the Software, and to permit persons to whom the
  14  * Software is furnished to do so, subject to the following conditions:
  15  *
  16  * The above copyright notice and this permission notice shall be included
  17  * in all copies or substantial portions of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  22  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  23  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  24  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  */
  26
  27 #include "glheader.h"
  28 #include "api_validate.h"
  29 #include "context.h"
  30 #include "mtypes.h"
  31 #include "state.h"
  32
  33
  34 GLboolean
  35 _mesa_validate_DrawElements(GLcontext *ctx,
  36                             GLenum mode, GLsizei count, GLenum type,
  37                             const GLvoid *indices)
  38 {
  39    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx,  GL_FALSE);
  40
  41    if (count <= 0) {
  42       if (count < 0)
  43          _mesa_error(ctx, GL_INVALID_VALUE, "glDrawElements(count)" );
  44       return GL_FALSE;
  45    }
  46
  47    if (mode < 0 ||
  48        mode > GL_POLYGON) {
  49       _mesa_error(ctx, GL_INVALID_ENUM, "glDrawArrays(mode)" );
  50       return GL_FALSE;
  51    }
  52
  53    if (type != GL_UNSIGNED_INT &&
  54        type != GL_UNSIGNED_BYTE &&
  55        type != GL_UNSIGNED_SHORT)
  56    {
  57       _mesa_error(ctx, GL_INVALID_ENUM, "glDrawElements(type)" );
  58       return GL_FALSE;
  59    }
  60
  61    if (ctx->NewState)
  62       _mesa_update_state( ctx );
  63
  64    if (!ctx->Array.Vertex.Enabled)
  65       return GL_FALSE;
  66
  67    return GL_TRUE;
  68 }
  69
  70
  71 GLboolean
  72 _mesa_validate_DrawRangeElements(GLcontext *ctx, GLenum mode,
  73                                  GLuint start, GLuint end,
  74                                  GLsizei count, GLenum type,
  75                                  const GLvoid *indices)
  76 {
  77    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
  78
  79    if (count <= 0) {
  80       if (count < 0)
  81          _mesa_error(ctx, GL_INVALID_VALUE, "glDrawElements(count)" );
  82       return GL_FALSE;
  83    }
  84
  85    if (mode < 0 || mode > GL_POLYGON) {
  86       _mesa_error(ctx, GL_INVALID_ENUM, "glDrawArrays(mode)" );
  87       return GL_FALSE;
  88    }
  89
  90    if (end < start) {
  91       _mesa_error(ctx, GL_INVALID_VALUE, "glDrawRangeElements(end<start)");
  92       return GL_FALSE;
  93    }
  94
  95    if (type != GL_UNSIGNED_INT &&
  96        type != GL_UNSIGNED_BYTE &&
  97        type != GL_UNSIGNED_SHORT)
  98    {
  99       _mesa_error(ctx, GL_INVALID_ENUM, "glDrawElements(type)" );
 100       return GL_FALSE;
 101    }
 102
 103    if (ctx->NewState)
 104       _mesa_update_state( ctx );
 105
 106    if (!ctx->Array.Vertex.Enabled)
 107       return GL_FALSE;
 108
 109    return GL_TRUE;
 110 }
 111
 112
 113
 114 GLboolean
 115 _mesa_validate_DrawArrays(GLcontext *ctx,
 116                           GLenum mode, GLint start, GLsizei count)
 117 {
 118    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
 119
 120    if (count<0) {
 121       _mesa_error(ctx, GL_INVALID_VALUE, "glDrawArrays(count)" );
 122       return GL_FALSE;
 123    }
 124
 125    if (mode < 0 || mode > GL_POLYGON) {
 126       _mesa_error(ctx, GL_INVALID_ENUM, "glDrawArrays(mode)" );
 127       return GL_FALSE;
 128    }
 129
 130    if (ctx->NewState)
 131       _mesa_update_state( ctx );
 132
 133    if (!ctx->Array.Vertex.Enabled)
 134       return GL_FALSE;
 135
 136    return GL_TRUE;
 137 }