src/mesa/main/api_validate.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  5.1
   4  *
   5  * Copyright (C) 1999-2003  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 #include "glheader.h"
  26 #include "api_validate.h"
  27 #include "context.h"
  28 #include "imports.h"
  29 #include "mtypes.h"
  30 #include "state.h"
  31
  32
  33 GLboolean
  34 _mesa_validate_DrawElements(GLcontext *ctx,
  35                             GLenum mode, GLsizei count, GLenum type,
  36                             const GLvoid *indices)
  37 {
  38    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx,  GL_FALSE);
  39
  40    if (count <= 0) {
  41       if (count < 0)
  42          _mesa_error(ctx, GL_INVALID_VALUE, "glDrawElements(count)" );
  43       return GL_FALSE;
  44    }
  45
  46    if (mode > GL_POLYGON) {
  47       _mesa_error(ctx, GL_INVALID_ENUM, "glDrawArrays(mode)" );
  48       return GL_FALSE;
  49    }
  50
  51    if (type != GL_UNSIGNED_INT &&
  52        type != GL_UNSIGNED_BYTE &&
  53        type != GL_UNSIGNED_SHORT)
  54    {
  55       _mesa_error(ctx, GL_INVALID_ENUM, "glDrawElements(type)" );
  56       return GL_FALSE;
  57    }
  58
  59    if (ctx->NewState)
  60       _mesa_update_state( ctx );
  61
  62    if (ctx->Array.Vertex.Enabled
  63        || (ctx->VertexProgram.Enabled && ctx->Array.VertexAttrib[0].Enabled))
  64       return GL_TRUE;
  65    else
  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          _mesa_error(ctx, GL_INVALID_VALUE, "glDrawElements(count)" );
  83       return GL_FALSE;
  84    }
  85
  86    if (mode > GL_POLYGON) {
  87       _mesa_error(ctx, GL_INVALID_ENUM, "glDrawArrays(mode)" );
  88       return GL_FALSE;
  89    }
  90
  91    if (end < start) {
  92       _mesa_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       _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        || (ctx->VertexProgram.Enabled && ctx->Array.VertexAttrib[0].Enabled))
 108       return GL_TRUE;
 109    else
 110       return GL_FALSE;
 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       _mesa_error(ctx, GL_INVALID_VALUE, "glDrawArrays(count)" );
 123       return GL_FALSE;
 124    }
 125
 126    if (mode > GL_POLYGON) {
 127       _mesa_error(ctx, GL_INVALID_ENUM, "glDrawArrays(mode)" );
 128       return GL_FALSE;
 129    }
 130
 131    if (ctx->NewState)
 132       _mesa_update_state( ctx );
 133
 134    if (ctx->Array.Vertex.Enabled
 135        || (ctx->VertexProgram.Enabled && ctx->Array.VertexAttrib[0].Enabled))
 136       return GL_TRUE;
 137    else
 138       return GL_FALSE;
 139 }