#include "glheader.h"
#include "api_validate.h"
#include "context.h"
#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, "glDrawElements(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.ArrayObj->Vertex.Enabled
&& !(ctx->VertexProgram._Enabled && ctx->Array.ArrayObj->VertexAttrib[0].Enabled))
return GL_FALSE;
if (ctx->Array.ElementArrayBufferObj->Name) {
GLuint indexBytes;
if (!ctx->Array.ElementArrayBufferObj->Data) {
_mesa_warning(ctx, "DrawElements with empty vertex elements buffer!");
return GL_FALSE;
}
if (type == GL_UNSIGNED_INT) {
indexBytes = count * sizeof(GLuint);
}
else if (type == GL_UNSIGNED_BYTE) {
indexBytes = count * sizeof(GLubyte);
}
else {
ASSERT(type == GL_UNSIGNED_SHORT);
indexBytes = count * sizeof(GLushort);
}
if ((GLubyte *) indices + indexBytes >
ctx->Array.ElementArrayBufferObj->Data +
ctx->Array.ElementArrayBufferObj->Size) {
_mesa_warning(ctx, "glDrawElements index out of buffer bounds");
return GL_FALSE;
}
if (ctx->Const.CheckArrayBounds) {
indices = (const GLvoid *)
ADD_POINTERS(ctx->Array.ElementArrayBufferObj->Data,
(const GLubyte *) indices);
}
}
if (ctx->Const.CheckArrayBounds) {
GLuint max = 0;
GLint i;
if (type == GL_UNSIGNED_INT) {
for (i = 0; i < count; i++)
if (((GLuint *) indices)[i] > max)
max = ((GLuint *) indices)[i];
}
else if (type == GL_UNSIGNED_SHORT) {
for (i = 0; i < count; i++)
if (((GLushort *) indices)[i] > max)
max = ((GLushort *) indices)[i];
}
else {
ASSERT(type == GL_UNSIGNED_BYTE);
for (i = 0; i < count; i++)
if (((GLubyte *) indices)[i] > max)
max = ((GLubyte *) indices)[i];
}
if (max >= ctx->Array._MaxElement) {
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, "glDrawRangeElements(count)" );
return GL_FALSE;
}
if (mode > GL_POLYGON) {
_mesa_error(ctx, GL_INVALID_ENUM, "glDrawRangeElements(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, "glDrawRangeElements(type)" );
return GL_FALSE;
}
if (ctx->NewState)
_mesa_update_state(ctx);
if (!ctx->Array.ArrayObj->Vertex.Enabled
&& !(ctx->VertexProgram._Enabled && ctx->Array.ArrayObj->VertexAttrib[0].Enabled))
return GL_FALSE;
if (ctx->Const.CheckArrayBounds) {
GLuint max = 0;
GLint i;
if (type == GL_UNSIGNED_INT) {
for (i = 0; i < count; i++)
if (((GLuint *) indices)[i] > max)
max = ((GLuint *) indices)[i];
}
else if (type == GL_UNSIGNED_SHORT) {
for (i = 0; i < count; i++)
if (((GLushort *) indices)[i] > max)
max = ((GLushort *) indices)[i];
}
else {
ASSERT(type == GL_UNSIGNED_BYTE);
for (i = 0; i < count; i++)
if (((GLubyte *) indices)[i] > max)
max = ((GLubyte *) indices)[i];
}
if (max >= ctx->Array._MaxElement) {
return GL_FALSE;
}
}
return GL_TRUE;
}
GLboolean
_mesa_validate_DrawArrays(GLcontext *ctx,
GLenum mode, GLint start, GLsizei count)
{
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);
if (!ctx->Array.ArrayObj->Vertex.Enabled && !ctx->Array.ArrayObj->VertexAttrib[0].Enabled)
return GL_FALSE;
if (ctx->Const.CheckArrayBounds) {
if (start + count > (GLint) ctx->Array._MaxElement)
return GL_FALSE;
}
return GL_TRUE;
}