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/*
* (C) Copyright IBM Corporation 2005
* 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, sub license,
* 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 (including the next
* paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL
* IBM,
* AND/OR THEIR SUPPLIERS 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 <X11/Xmd.h>
#include <GL/gl.h>
#include <GL/glxproto.h>
#ifdef __linux__
#include <byteswap.h>
#else
#include <sys/endian.h>
#define bswap_16 bswap16
#define bswap_32 bswap32
#define bswap_64 bswap64
#endif
#include <inttypes.h>
#include "indirect_size.h"
#include "indirect_size_get.h"
#include "indirect_dispatch.h"
#include "glxserver.h"
#include "singlesize.h"
#include "glapitable.h"
#include "glapi.h"
#include "glthread.h"
#include "dispatch.h"
#include "glxext.h"
#include "indirect_util.h"
#define __GLX_PAD(a) (((a)+3)&~3)
extern xGLXSingleReply __glXReply;
GLint
__glGetBooleanv_variable_size( GLenum e )
{
if ( e == GL_COMPRESSED_TEXTURE_FORMATS ) {
GLint temp;
CALL_GetIntegerv( GET_DISPATCH(),
(GL_NUM_COMPRESSED_TEXTURE_FORMATS, & temp) );
return temp;
}
else {
return 0;
}
}
/**
* Get a properly aligned buffer to hold reply data.
*
* \warning
* This function assumes that \c local_buffer is already properly aligned.
* It also assumes that \c alignment is a power of two.
*/
void *
__glXGetAnswerBuffer( __GLXclientState * cl, size_t required_size,
void * local_buffer, size_t local_size, unsigned alignment )
{
void * buffer = local_buffer;
const unsigned mask = alignment - 1;
if ( local_size < required_size ) {
const size_t worst_case_size = required_size + alignment;
intptr_t temp_buf;
if ( cl->returnBufSize < worst_case_size ) {
void * temp = xrealloc( cl->returnBuf, worst_case_size );
if ( temp == NULL ) {
return NULL;
}
cl->returnBuf = temp;
cl->returnBufSize = worst_case_size;
}
temp_buf = (intptr_t) cl->returnBuf;
temp_buf = (temp_buf + mask) & ~mask;
buffer = (void *) temp_buf;
}
return buffer;
}
/**
* Send a GLX reply to the client.
*
* Technically speaking, there are several different ways to encode a GLX
* reply. The primary difference is whether or not certain fields (e.g.,
* retval, size, and "pad3") are set. This function gets around that by
* always setting all of the fields to "reasonable" values. This does no
* harm to clients, but it does make the server-side code much more compact.
*/
void
__glXSendReply( ClientPtr client, const void * data, size_t elements,
size_t element_size, GLboolean always_array, CARD32 retval )
{
size_t reply_ints = 0;
if ( __glXErrorOccured() ) {
elements = 0;
}
else if ( (elements > 1) || always_array ) {
reply_ints = ((elements * element_size) + 3) >> 2;
}
__glXReply.length = reply_ints;
__glXReply.type = X_Reply;
__glXReply.sequenceNumber = client->sequence;
__glXReply.size = elements;
__glXReply.retval = retval;
/* It is faster on almost always every architecture to just copy the 8
* bytes, even when not necessary, than check to see of the value of
* elements requires it. Copying the data when not needed will do no
* harm.
*/
(void) memcpy( & __glXReply.pad3, data, 8 );
WriteToClient( client, sz_xGLXSingleReply, (char *) & __glXReply );
if ( reply_ints != 0 ) {
WriteToClient( client, reply_ints * 4, (char *) data );
}
}
/**
* Send a GLX reply to the client.
*
* Technically speaking, there are several different ways to encode a GLX
* reply. The primary difference is whether or not certain fields (e.g.,
* retval, size, and "pad3") are set. This function gets around that by
* always setting all of the fields to "reasonable" values. This does no
* harm to clients, but it does make the server-side code much more compact.
*
* \warning
* This function assumes that values stored in \c data will be byte-swapped
* by the caller if necessary.
*/
void
__glXSendReplySwap( ClientPtr client, const void * data, size_t elements,
size_t element_size, GLboolean always_array, CARD32 retval )
{
size_t reply_ints = 0;
if ( __glXErrorOccured() ) {
elements = 0;
}
else if ( (elements > 1) || always_array ) {
reply_ints = ((elements * element_size) + 3) >> 2;
}
__glXReply.length = bswap_32( reply_ints );
__glXReply.type = bswap_32( X_Reply );
__glXReply.sequenceNumber = bswap_32( client->sequence );
__glXReply.size = bswap_32( elements );
__glXReply.retval = bswap_32( retval );
/* It is faster on almost always every architecture to just copy the 8
* bytes, even when not necessary, than check to see of the value of
* elements requires it. Copying the data when not needed will do no
* harm.
*/
(void) memcpy( & __glXReply.pad3, data, 8 );
WriteToClient( client, sz_xGLXSingleReply, (char *) & __glXReply );
if ( reply_ints != 0 ) {
WriteToClient( client, reply_ints * 4, (char *) data );
}
}
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