src/mesa/main/api_validate.c

   1
   2 /* $Id: api_validate.c,v 1.3 2001/01/05 02:26:48 keithw Exp $ */
   3
   4 /*
   5  * Mesa 3-D graphics library
   6  * Version:  3.5
   7  *
   8  * Copyright (C) 1999-2000  Brian Paul   All Rights Reserved.
   9  *
  10  * Permission is hereby granted, free of charge, to any person obtaining a
  11  * copy of this software and associated documentation files (the "Software"),
  12  * to deal in the Software without restriction, including without limitation
  13  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  14  * and/or sell copies of the Software, and to permit persons to whom the
  15  * Software is furnished to do so, subject to the following conditions:
  16  *
  17  * The above copyright notice and this permission notice shall be included
  18  * in all copies or substantial portions of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  21  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  23  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  24  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  25  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  26  */
  27
  28 #include "glheader.h"
  29 #include "api_validate.h"
  30 #include "context.h"
  31 #include "mtypes.h"
  32 #include "state.h"
  33
  34
  35 GLboolean
  36 _mesa_validate_DrawElements(GLcontext *ctx,
  37                             GLenum mode, GLsizei count, GLenum type,
  38                             const GLvoid *indices)
  39 {
  40    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx,  GL_FALSE);
  41
  42    if (count <= 0) {
  43       if (count < 0)
  44          gl_error(ctx, GL_INVALID_VALUE, "glDrawElements(count)" );
  45       return GL_FALSE;
  46    }
  47
  48    if (mode < 0 ||
  49        mode > GL_POLYGON) {
  50       gl_error(ctx, GL_INVALID_ENUM, "glDrawArrays(mode)" );
  51       return GL_FALSE;
  52    }
  53
  54    if (type != GL_UNSIGNED_INT &&
  55        type != GL_UNSIGNED_BYTE &&
  56        type != GL_UNSIGNED_SHORT)
  57    {
  58       gl_error(ctx, GL_INVALID_ENUM, "glDrawElements(type)" );
  59       return GL_FALSE;
  60    }
  61
  62    if (ctx->NewState)
  63       gl_update_state( ctx );
  64
  65    if (!ctx->Array.Vertex.Enabled)
  66       return GL_FALSE;
  67
  68    return GL_TRUE;
  69 }
  70
  71
  72 GLboolean
  73 _mesa_validate_DrawRangeElements(GLcontext *ctx, GLenum mode,
  74                                  GLuint start, GLuint end,
  75                                  GLsizei count, GLenum type,
  76                                  const GLvoid *indices)
  77 {
  78    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
  79
  80    if (count <= 0) {
  81       if (count < 0)
  82          gl_error(ctx, GL_INVALID_VALUE, "glDrawElements(count)" );
  83       return GL_FALSE;
  84    }
  85
  86    if (mode < 0 || mode > GL_POLYGON) {
  87       gl_error(ctx, GL_INVALID_ENUM, "glDrawArrays(mode)" );
  88       return GL_FALSE;
  89    }
  90
  91    if (end < start) {
  92       gl_error(ctx, GL_INVALID_VALUE, "glDrawRangeElements(end<start)");
  93       return GL_FALSE;
  94    }
  95
  96    if (type != GL_UNSIGNED_INT &&
  97        type != GL_UNSIGNED_BYTE &&
  98        type != GL_UNSIGNED_SHORT)
  99    {
 100       gl_error(ctx, GL_INVALID_ENUM, "glDrawElements(type)" );
 101       return GL_FALSE;
 102    }
 103
 104    if (ctx->NewState)
 105       gl_update_state( ctx );
 106
 107    if (!ctx->Array.Vertex.Enabled)
 108       return GL_FALSE;
 109
 110    return GL_TRUE;
 111 }
 112
 113
 114
 115 GLboolean
 116 _mesa_validate_DrawArrays(GLcontext *ctx,
 117                           GLenum mode, GLint start, GLsizei count)
 118 {
 119    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
 120
 121    if (count<0) {
 122       gl_error(ctx, GL_INVALID_VALUE, "glDrawArrays(count)" );
 123       return GL_FALSE;
 124    }
 125
 126    if (mode < 0 || mode > GL_POLYGON) {
 127       gl_error(ctx, GL_INVALID_ENUM, "glDrawArrays(mode)" );
 128       return GL_FALSE;
 129    }
 130
 131    if (ctx->NewState)
 132       gl_update_state( ctx );
 133
 134    if (!ctx->Array.Vertex.Enabled)
 135       return GL_FALSE;
 136
 137    return GL_TRUE;
 138 }
 139