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/*
* Mesa 3-D graphics library
* Version: 5.1
*
* Copyright (C) 1999-2003 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.
*/
#include "glheader.h"
#include "api_validate.h"
#include "context.h"
#include "image.h" /* for _mesa_sizeof_type() */
#include "imports.h"
#include "mtypes.h"
#include "state.h"
GLboolean
_mesa_validate_DrawElements(GLcontext *ctx,
GLenum mode, GLsizei count, GLenum type,
const GLvoid *indices)
{
ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
if (count <= 0) {
if (count < 0)
_mesa_error(ctx, GL_INVALID_VALUE, "glDrawElements(count)" );
return GL_FALSE;
}
if (mode > GL_POLYGON) {
_mesa_error(ctx, GL_INVALID_ENUM, "glDrawArrays(mode)" );
return GL_FALSE;
}
if (type != GL_UNSIGNED_INT &&
type != GL_UNSIGNED_BYTE &&
type != GL_UNSIGNED_SHORT)
{
_mesa_error(ctx, GL_INVALID_ENUM, "glDrawElements(type)" );
return GL_FALSE;
}
if (ctx->NewState)
_mesa_update_state( ctx );
if (ctx->Array.Vertex.Enabled
|| (ctx->VertexProgram.Enabled && ctx->Array.VertexAttrib[0].Enabled))
return GL_TRUE;
else
return GL_FALSE;
return GL_TRUE;
}
GLboolean
_mesa_validate_DrawRangeElements(GLcontext *ctx, GLenum mode,
GLuint start, GLuint end,
GLsizei count, GLenum type,
const GLvoid *indices)
{
ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
if (count <= 0) {
if (count < 0)
_mesa_error(ctx, GL_INVALID_VALUE, "glDrawElements(count)" );
return GL_FALSE;
}
if (mode > GL_POLYGON) {
_mesa_error(ctx, GL_INVALID_ENUM, "glDrawArrays(mode)" );
return GL_FALSE;
}
if (end < start) {
_mesa_error(ctx, GL_INVALID_VALUE, "glDrawRangeElements(end<start)");
return GL_FALSE;
}
if (type != GL_UNSIGNED_INT &&
type != GL_UNSIGNED_BYTE &&
type != GL_UNSIGNED_SHORT) {
_mesa_error(ctx, GL_INVALID_ENUM, "glDrawElements(type)" );
return GL_FALSE;
}
if (ctx->NewState)
_mesa_update_state( ctx );
if (ctx->Array.Vertex.Enabled
|| (ctx->VertexProgram.Enabled && ctx->Array.VertexAttrib[0].Enabled))
return GL_TRUE;
else
return GL_FALSE;
}
/**
* Helper routine for validating vertex array data to be sure the given
* element lies within the legal range (i.e. vertex buffer object).
*/
static INLINE GLboolean
validate(GLcontext *ctx, GLint attribArray,
const struct gl_client_array *array, GLint element)
{
if (ctx->VertexProgram.Enabled
&& attribArray >= 0
&& ctx->Array.VertexAttrib[attribArray].Enabled) {
if (element >= ctx->Array.VertexAttrib[attribArray]._MaxElement)
return GL_FALSE;
}
else if (array && array->Enabled) {
if (element >= array->_MaxElement)
return GL_FALSE;
}
return GL_TRUE;
}
/**
* Called from the tnl module to error check the function parameters and
* verify that we really can draw something.
*/
GLboolean
_mesa_validate_DrawArrays(GLcontext *ctx,
GLenum mode, GLint start, GLsizei count)
{
GLint i;
ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
if (count < 0) {
_mesa_error(ctx, GL_INVALID_VALUE, "glDrawArrays(count)" );
return GL_FALSE;
}
if (mode > GL_POLYGON) {
_mesa_error(ctx, GL_INVALID_ENUM, "glDrawArrays(mode)" );
return GL_FALSE;
}
if (ctx->NewState)
_mesa_update_state( ctx );
/* Either the conventional vertex position array, or the 0th
* generic vertex attribute array is required to be enabled.
*/
if (ctx->VertexProgram.Enabled
&& ctx->Array.VertexAttrib[VERT_ATTRIB_POS].Enabled) {
if (start + count >= ctx->Array.VertexAttrib[VERT_ATTRIB_POS]._MaxElement)
return GL_FALSE;
}
else if (ctx->Array.Vertex.Enabled) {
if (start + count >= ctx->Array.Vertex._MaxElement)
return GL_FALSE;
}
else {
/* no vertex position array! */
return GL_FALSE;
}
/*
* OK, now check all the other enabled arrays to be sure the elements
* are in bounds.
*/
if (!validate(ctx, VERT_ATTRIB_WEIGHT, NULL, start + count))
return GL_FALSE;
if (!validate(ctx, VERT_ATTRIB_NORMAL, &ctx->Array.Normal, start + count))
return GL_FALSE;
if (!validate(ctx, VERT_ATTRIB_COLOR0, &ctx->Array.Color, start + count))
return GL_FALSE;
if (!validate(ctx, VERT_ATTRIB_COLOR1, &ctx->Array.SecondaryColor, start + count))
return GL_FALSE;
if (!validate(ctx, VERT_ATTRIB_FOG, &ctx->Array.FogCoord, start + count))
return GL_FALSE;
if (!validate(ctx, VERT_ATTRIB_SIX, NULL, start + count))
return GL_FALSE;
if (!validate(ctx, VERT_ATTRIB_SEVEN, &ctx->Array.FogCoord, start + count))
return GL_FALSE;
for (i = 0; i < MAX_TEXTURE_COORD_UNITS; i++)
if (!validate(ctx, VERT_ATTRIB_TEX0 + i, &ctx->Array.TexCoord[i], start + count))
return GL_FALSE;
if (!validate(ctx, -1, &ctx->Array.Index, start + count))
return GL_FALSE;
if (!validate(ctx, -1, &ctx->Array.EdgeFlag, start + count))
return GL_FALSE;
return GL_TRUE;
}
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