292 lines
8.9 KiB
C
292 lines
8.9 KiB
C
/*
|
|
* (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 <dix-config.h>
|
|
|
|
#include <string.h>
|
|
|
|
#include <X11/Xmd.h>
|
|
#include <GL/gl.h>
|
|
#include <GL/glxproto.h>
|
|
#include <inttypes.h>
|
|
#include "indirect_size.h"
|
|
#include "indirect_size_get.h"
|
|
#include "indirect_dispatch.h"
|
|
#include "glxserver.h"
|
|
#include "glxbyteorder.h"
|
|
#include "singlesize.h"
|
|
#include "glxext.h"
|
|
#include "indirect_table.h"
|
|
#include "indirect_util.h"
|
|
|
|
#define __GLX_PAD(a) (((a)+3)&~3)
|
|
|
|
GLint
|
|
__glGetBooleanv_variable_size(GLenum e)
|
|
{
|
|
if (e == GL_COMPRESSED_TEXTURE_FORMATS) {
|
|
GLint temp;
|
|
|
|
glGetIntegerv(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 intptr_t mask = alignment - 1;
|
|
|
|
if (local_size < required_size) {
|
|
size_t worst_case_size;
|
|
intptr_t temp_buf;
|
|
|
|
if (required_size < SIZE_MAX - alignment)
|
|
worst_case_size = required_size + alignment;
|
|
else
|
|
return NULL;
|
|
|
|
if (cl->returnBufSize < worst_case_size) {
|
|
void *temp = realloc(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;
|
|
xGLXSingleReply reply = { 0, };
|
|
|
|
if (__glXErrorOccured()) {
|
|
elements = 0;
|
|
}
|
|
else if ((elements > 1) || always_array) {
|
|
reply_ints = bytes_to_int32(elements * element_size);
|
|
}
|
|
|
|
reply.length = reply_ints;
|
|
reply.type = X_Reply;
|
|
reply.sequenceNumber = client->sequence;
|
|
reply.size = elements;
|
|
reply.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(&reply.pad3, data, 8);
|
|
WriteToClient(client, sz_xGLXSingleReply, &reply);
|
|
|
|
if (reply_ints != 0) {
|
|
WriteToClient(client, reply_ints * 4, 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;
|
|
xGLXSingleReply reply = { 0, };
|
|
|
|
if (__glXErrorOccured()) {
|
|
elements = 0;
|
|
}
|
|
else if ((elements > 1) || always_array) {
|
|
reply_ints = bytes_to_int32(elements * element_size);
|
|
}
|
|
|
|
reply.length = bswap_32(reply_ints);
|
|
reply.type = X_Reply;
|
|
reply.sequenceNumber = bswap_16(client->sequence);
|
|
reply.size = bswap_32(elements);
|
|
reply.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(&reply.pad3, data, 8);
|
|
WriteToClient(client, sz_xGLXSingleReply, &reply);
|
|
|
|
if (reply_ints != 0) {
|
|
WriteToClient(client, reply_ints * 4, data);
|
|
}
|
|
}
|
|
|
|
static int
|
|
get_decode_index(const struct __glXDispatchInfo *dispatch_info, unsigned opcode)
|
|
{
|
|
int remaining_bits;
|
|
int next_remain;
|
|
const int_fast16_t *const tree = dispatch_info->dispatch_tree;
|
|
int_fast16_t index;
|
|
|
|
remaining_bits = dispatch_info->bits;
|
|
if (opcode >= (1U << remaining_bits)) {
|
|
return -1;
|
|
}
|
|
|
|
index = 0;
|
|
for ( /* empty */ ; remaining_bits > 0; remaining_bits = next_remain) {
|
|
unsigned mask;
|
|
unsigned child_index;
|
|
|
|
/* Calculate the slice of bits used by this node.
|
|
*
|
|
* If remaining_bits = 8 and tree[index] = 3, the mask of just the
|
|
* remaining bits is 0x00ff and the mask for the remaining bits after
|
|
* this node is 0x001f. By taking 0x00ff & ~0x001f, we get 0x00e0.
|
|
* This masks the 3 bits that we would want for this node.
|
|
*/
|
|
|
|
next_remain = remaining_bits - tree[index];
|
|
mask = ((1 << remaining_bits) - 1) & ~((1 << next_remain) - 1);
|
|
|
|
/* Using the mask, calculate the index of the opcode in the node.
|
|
* With that index, fetch the index of the next node.
|
|
*/
|
|
|
|
child_index = (opcode & mask) >> next_remain;
|
|
index = tree[index + 1 + child_index];
|
|
|
|
/* If the next node is an empty leaf, the opcode is for a non-existent
|
|
* function. We're done.
|
|
*
|
|
* If the next node is a non-empty leaf, look up the function pointer
|
|
* and return it.
|
|
*/
|
|
|
|
if (index == EMPTY_LEAF) {
|
|
return -1;
|
|
}
|
|
else if (IS_LEAF_INDEX(index)) {
|
|
unsigned func_index;
|
|
|
|
/* The value stored in the tree for a leaf node is the base of
|
|
* the function pointers for that leaf node. The offset for the
|
|
* function for a particular opcode is the remaining bits in the
|
|
* opcode.
|
|
*/
|
|
|
|
func_index = -index;
|
|
func_index += opcode & ((1 << next_remain) - 1);
|
|
return func_index;
|
|
}
|
|
}
|
|
|
|
/* We should *never* get here!!!
|
|
*/
|
|
return -1;
|
|
}
|
|
|
|
void *
|
|
__glXGetProtocolDecodeFunction(const struct __glXDispatchInfo *dispatch_info,
|
|
int opcode, int swapped_version)
|
|
{
|
|
const int func_index = get_decode_index(dispatch_info, opcode);
|
|
|
|
return (func_index < 0)
|
|
? NULL
|
|
: (void *) dispatch_info->
|
|
dispatch_functions[func_index][swapped_version];
|
|
}
|
|
|
|
int
|
|
__glXGetProtocolSizeData(const struct __glXDispatchInfo *dispatch_info,
|
|
int opcode, __GLXrenderSizeData * data)
|
|
{
|
|
if (dispatch_info->size_table != NULL) {
|
|
const int func_index = get_decode_index(dispatch_info, opcode);
|
|
|
|
if ((func_index >= 0)
|
|
&& (dispatch_info->size_table[func_index][0] != 0)) {
|
|
const int var_offset = dispatch_info->size_table[func_index][1];
|
|
|
|
data->bytes = dispatch_info->size_table[func_index][0];
|
|
data->varsize = (var_offset != ~0)
|
|
? dispatch_info->size_func_table[var_offset]
|
|
: NULL;
|
|
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return -1;
|
|
}
|