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xserver-multidpi/hw/dmx/glxProxy/glxsingle.c
Adam Jackson 69b79c1a66 Update to SGI FreeB 2.0. 
Under the terms of version 1.1, "once Covered Code has been published
under a particular version of the License, Recipient may, for the
duration of the License, continue to use it under the terms of that
version, or choose to use such Covered Code under the terms of any
subsequent version published by SGI."

FreeB 2.0 license refers to "dates of first publication".  They are here
taken to be 1991-2000, as noted in the original license text:

 ** Original Code. The Original Code is: OpenGL Sample Implementation,
 ** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
 ** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
 ** Copyright in any portions created by third parties is as indicated
 ** elsewhere herein. All Rights Reserved.

Official FreeB 2.0 text:

http://oss.sgi.com/projects/FreeB/SGIFreeSWLicB.2.0.pdf

As always, this code has not been tested for conformance with the OpenGL
specification.  OpenGL conformance testing is available from
http://khronos.org/ and is required for use of the OpenGL logo in
product advertising and promotion.
2008-09-19 12:02:28 -04:00

1014 lines
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/* DO NOT EDIT - THIS FILE IS AUTOMATICALLY GENERATED */
/*
* SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
* Copyright (C) 1991-2000 Silicon Graphics, Inc. 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 including the dates of first publication and
* either this permission notice or a reference to
* http://oss.sgi.com/projects/FreeB/
* 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
* SILICON GRAPHICS, INC. 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.
*
* Except as contained in this notice, the name of Silicon Graphics, Inc.
* shall not be used in advertising or otherwise to promote the sale, use or
* other dealings in this Software without prior written authorization from
* Silicon Graphics, Inc.
*/
#ifdef HAVE_DMX_CONFIG_H
#include <dmx-config.h>
#endif
#include "dmx.h"
#include "dmxwindow.h"
#include "dmxpixmap.h"
#include "dmxfont.h"
#include "dmxcb.h"
#undef Xmalloc
#undef Xcalloc
#undef Xrealloc
#undef Xfree
#define NEED_REPLIES
#include "glxserver.h"
#include "glxext.h"
#include "g_disptab.h"
/* #include "g_disptab_EXT.h" */
#include "unpack.h"
#include "glxutil.h"
#include "GL/glxproto.h"
#ifdef PANORAMIX
#include "panoramiXsrv.h"
#endif
/*
* GetReqSingle - this is the equivalent of GetReq macro
* from Xlibint.h but it does not set the reqType field (the opcode).
* this is because the GL single opcodes has different naming convension
* the other X opcodes (ie. X_GLsop_GetFloatv).
*/
#if (defined(__STDC__) && !defined(UNIXCPP)) || defined(ANSICPP)
#define GetReqSingle(name, req) \
WORD64ALIGN\
if ((dpy->bufptr + SIZEOF(x##name##Req)) > dpy->bufmax)\
_XFlush(dpy);\
req = (x##name##Req *)(dpy->last_req = dpy->bufptr);\
req->length = (SIZEOF(x##name##Req))>>2;\
dpy->bufptr += SIZEOF(x##name##Req);\
dpy->request++
#else /* non-ANSI C uses empty comment instead of "##" for token concatenation */
#define GetReqSingle(name, req) \
WORD64ALIGN\
if ((dpy->bufptr + SIZEOF(x/**/name/**/Req)) > dpy->bufmax)\
_XFlush(dpy);\
req = (x/**/name/**/Req *)(dpy->last_req = dpy->bufptr);\
req->length = (SIZEOF(x/**/name/**/Req))>>2;\
dpy->bufptr += SIZEOF(x/**/name/**/Req);\
dpy->request++
#endif
#define X_GLXSingle 0 /* needed by GetReqExtra */
extern Display *GetBackEndDisplay( __GLXclientState *cl, int s );
extern int GetCurrentBackEndTag(__GLXclientState *cl, GLXContextTag tag, int s);
static int swap_vec_element_size = 0;
static void SendSwappedReply( ClientPtr client,
xGLXSingleReply *reply,
char *buf,
int buf_size )
{
__GLX_DECLARE_SWAP_VARIABLES;
__GLX_SWAP_SHORT(&reply->sequenceNumber);
__GLX_SWAP_INT(&reply->length);
__GLX_SWAP_INT(&reply->retval);
__GLX_SWAP_INT(&reply->size);
if ( (buf_size == 0) && (swap_vec_element_size > 0) ) {
/*
* the reply has single component - need to swap pad3
*/
if (swap_vec_element_size == 2) {
__GLX_SWAP_SHORT(&reply->pad3);
}
else if (swap_vec_element_size == 4) {
__GLX_SWAP_INT(&reply->pad3);
__GLX_SWAP_INT(&reply->pad4); /* some requests use also pad4
* i.e GetConvolutionFilter
*/
}
else if (swap_vec_element_size == 8) {
__GLX_SWAP_DOUBLE(&reply->pad3);
}
}
else if ( (buf_size > 0) && (swap_vec_element_size > 0) ) {
/*
* the reply has vector of elements which needs to be swapped
*/
int vsize = buf_size / swap_vec_element_size;
char *p = buf;
int i;
for (i=0; i<vsize; i++) {
if (swap_vec_element_size == 2) {
__GLX_SWAP_SHORT(p);
}
else if (swap_vec_element_size == 4) {
__GLX_SWAP_INT(p);
}
else if (swap_vec_element_size == 8) {
__GLX_SWAP_DOUBLE(p);
}
p += swap_vec_element_size;
}
/*
* swap pad words as well - for case that some single reply uses
* them as well
*/
__GLX_SWAP_INT(&reply->pad3);
__GLX_SWAP_INT(&reply->pad4);
__GLX_SWAP_INT(&reply->pad5);
__GLX_SWAP_INT(&reply->pad6);
}
WriteToClient(client, sizeof(xGLXSingleReply),(char *)reply);
if (buf_size > 0)
WriteToClient(client, buf_size, (char *)buf);
}
int __glXForwardSingleReq( __GLXclientState *cl, GLbyte *pc )
{
xGLXSingleReq *req = (xGLXSingleReq *)pc;
xGLXSingleReq *be_req;
__GLXcontext *glxc;
int from_screen = 0;
int to_screen = 0;
int buf_size;
int s;
glxc = __glXLookupContextByTag(cl, req->contextTag);
if (!glxc) {
return 0;
}
from_screen = to_screen = glxc->pScreen->myNum;
#ifdef PANORAMIX
if (!noPanoramiXExtension) {
from_screen = 0;
to_screen = screenInfo.numScreens - 1;
}
#endif
pc += sz_xGLXSingleReq;
buf_size = (req->length << 2) - sz_xGLXSingleReq;
/*
* just forward the request to back-end server(s)
*/
for (s=from_screen; s<=to_screen; s++) {
DMXScreenInfo *dmxScreen = &dmxScreens[s];
Display *dpy = GetBackEndDisplay(cl,s);
LockDisplay(dpy);
GetReqSingle(GLXSingle,be_req);
be_req->reqType = dmxScreen->glxMajorOpcode;
be_req->glxCode = req->glxCode;
be_req->length = req->length;
be_req->contextTag = GetCurrentBackEndTag(cl,req->contextTag,s);
if (buf_size > 0)
_XSend(dpy, (const char *)pc, buf_size);
UnlockDisplay(dpy);
SyncHandle();
if (req->glxCode == X_GLsop_Flush) {
XFlush(dpy);
}
}
return Success;
}
int __glXForwardPipe0WithReply( __GLXclientState *cl, GLbyte *pc )
{
ClientPtr client = cl->client;
xGLXSingleReq *req = (xGLXSingleReq *)pc;
xGLXSingleReq *be_req;
xGLXSingleReply reply;
xGLXSingleReply be_reply;
__GLXcontext *glxc;
int buf_size;
char *be_buf;
int be_buf_size;
DMXScreenInfo *dmxScreen;
Display *dpy;
glxc = __glXLookupContextByTag(cl, req->contextTag);
if (!glxc) {
return __glXBadContext;
}
pc += sz_xGLXSingleReq;
buf_size = (req->length << 2) - sz_xGLXSingleReq;
dmxScreen = &dmxScreens[glxc->pScreen->myNum];
dpy = GetBackEndDisplay(cl, glxc->pScreen->myNum);
/*
* send the request to the first back-end server
*/
LockDisplay(dpy);
GetReqSingle(GLXSingle,be_req);
be_req->reqType = dmxScreen->glxMajorOpcode;
be_req->glxCode = req->glxCode;
be_req->length = req->length;
be_req->contextTag = GetCurrentBackEndTag(cl,req->contextTag,glxc->pScreen->myNum);
if (buf_size > 0)
_XSend(dpy, (const char *)pc, buf_size);
/*
* get the reply from the back-end server
*/
_XReply(dpy, (xReply*) &be_reply, 0, False);
be_buf_size = be_reply.length << 2;
if (be_buf_size > 0) {
be_buf = (char *)Xalloc( be_buf_size );
if (be_buf) {
_XRead(dpy, be_buf, be_buf_size);
}
else {
/* Throw data on the floor */
_XEatData(dpy, be_buf_size);
return BadAlloc;
}
}
UnlockDisplay(dpy);
SyncHandle();
/*
* send the reply to the client
*/
reply.type = X_Reply;
reply.sequenceNumber = client->sequence;
reply.length = be_reply.length;
reply.retval = be_reply.retval;
reply.size = be_reply.size;
reply.pad3 = be_reply.pad3;
reply.pad4 = be_reply.pad4;
if (client->swapped) {
SendSwappedReply( client, &reply, be_buf, be_buf_size );
}
else {
WriteToClient(client, sizeof(xGLXSingleReply),(char *)&reply);
if (be_buf_size > 0)
WriteToClient(client, be_buf_size, (char *)be_buf);
}
if (be_buf_size > 0) Xfree(be_buf);
return Success;
}
int __glXForwardAllWithReply( __GLXclientState *cl, GLbyte *pc )
{
ClientPtr client = cl->client;
xGLXSingleReq *req = (xGLXSingleReq *)pc;
xGLXSingleReq *be_req;
xGLXSingleReply reply;
xGLXSingleReply be_reply;
__GLXcontext *glxc;
int buf_size;
char *be_buf;
int be_buf_size;
int from_screen = 0;
int to_screen = 0;
int s;
DMXScreenInfo *dmxScreen;
Display *dpy;
glxc = __glXLookupContextByTag(cl, req->contextTag);
if (!glxc) {
return 0;
}
from_screen = to_screen = glxc->pScreen->myNum;
#ifdef PANORAMIX
if (!noPanoramiXExtension) {
from_screen = 0;
to_screen = screenInfo.numScreens - 1;
}
#endif
pc += sz_xGLXSingleReq;
buf_size = (req->length << 2) - sz_xGLXSingleReq;
/*
* send the request to the first back-end server(s)
*/
for (s=to_screen; s>=from_screen; s--) {
dmxScreen = &dmxScreens[s];
dpy = GetBackEndDisplay(cl,s);
LockDisplay(dpy);
GetReqSingle(GLXSingle,be_req);
be_req->reqType = dmxScreen->glxMajorOpcode;
be_req->glxCode = req->glxCode;
be_req->length = req->length;
be_req->contextTag = GetCurrentBackEndTag(cl,req->contextTag,s);
if (buf_size > 0)
_XSend(dpy, (const char *)pc, buf_size);
/*
* get the reply from the back-end server
*/
_XReply(dpy, (xReply*) &be_reply, 0, False);
be_buf_size = be_reply.length << 2;
if (be_buf_size > 0) {
be_buf = (char *)Xalloc( be_buf_size );
if (be_buf) {
_XRead(dpy, be_buf, be_buf_size);
}
else {
/* Throw data on the floor */
_XEatData(dpy, be_buf_size);
return BadAlloc;
}
}
UnlockDisplay(dpy);
SyncHandle();
if (s > from_screen && be_buf_size > 0) {
Xfree(be_buf);
}
}
/*
* send the reply to the client
*/
reply.type = X_Reply;
reply.sequenceNumber = client->sequence;
reply.length = be_reply.length;
reply.retval = be_reply.retval;
reply.size = be_reply.size;
reply.pad3 = be_reply.pad3;
reply.pad4 = be_reply.pad4;
if (client->swapped) {
SendSwappedReply( client, &reply, be_buf, be_buf_size );
}
else {
WriteToClient(client, sizeof(xGLXSingleReply),(char *)&reply);
if (be_buf_size > 0)
WriteToClient(client, be_buf_size, (char *)be_buf);
}
if (be_buf_size > 0) Xfree(be_buf);
return Success;
}
int __glXForwardSingleReqSwap( __GLXclientState *cl, GLbyte *pc )
{
xGLXSingleReq *req = (xGLXSingleReq *)pc;
__GLX_DECLARE_SWAP_VARIABLES;
__GLX_SWAP_SHORT(&req->length);
__GLX_SWAP_INT(&req->contextTag);
swap_vec_element_size = 0;
/*
* swap extra data in request - assuming all data
* (if available) are arrays of 4 bytes components !
*/
if (req->length > sz_xGLXSingleReq/4) {
int *data = (int *)(req+1);
int count = req->length - sz_xGLXSingleReq/4;
__GLX_SWAP_INT_ARRAY(data, count );
}
return( __glXForwardSingleReq( cl, pc ) );
}
int __glXForwardPipe0WithReplySwap( __GLXclientState *cl, GLbyte *pc )
{
xGLXSingleReq *req = (xGLXSingleReq *)pc;
__GLX_DECLARE_SWAP_VARIABLES;
__GLX_SWAP_SHORT(&req->length);
__GLX_SWAP_INT(&req->contextTag);
swap_vec_element_size = 0;
/*
* swap extra data in request - assuming all data
* (if available) are arrays of 4 bytes components !
*/
if (req->length > sz_xGLXSingleReq/4) {
int *data = (int *)(req+1);
int count = req->length - sz_xGLXSingleReq/4;
__GLX_SWAP_INT_ARRAY(data, count );
}
return( __glXForwardPipe0WithReply( cl, pc ) );
}
int __glXForwardPipe0WithReplySwapsv( __GLXclientState *cl, GLbyte *pc )
{
xGLXSingleReq *req = (xGLXSingleReq *)pc;
__GLX_DECLARE_SWAP_VARIABLES;
__GLX_SWAP_SHORT(&req->length);
__GLX_SWAP_INT(&req->contextTag);
swap_vec_element_size = 2;
/*
* swap extra data in request - assuming all data
* (if available) are arrays of 4 bytes components !
*/
if (req->length > sz_xGLXSingleReq/4) {
int *data = (int *)(req+1);
int count = req->length - sz_xGLXSingleReq/4;
__GLX_SWAP_INT_ARRAY(data, count );
}
return( __glXForwardPipe0WithReply( cl, pc ) );
}
int __glXForwardPipe0WithReplySwapiv( __GLXclientState *cl, GLbyte *pc )
{
xGLXSingleReq *req = (xGLXSingleReq *)pc;
__GLX_DECLARE_SWAP_VARIABLES;
__GLX_SWAP_SHORT(&req->length);
__GLX_SWAP_INT(&req->contextTag);
swap_vec_element_size = 4;
/*
* swap extra data in request - assuming all data
* (if available) are arrays of 4 bytes components !
*/
if (req->length > sz_xGLXSingleReq/4) {
int *data = (int *)(req+1);
int count = req->length - sz_xGLXSingleReq/4;
__GLX_SWAP_INT_ARRAY(data, count );
}
return( __glXForwardPipe0WithReply( cl, pc ) );
}
int __glXForwardPipe0WithReplySwapdv( __GLXclientState *cl, GLbyte *pc )
{
xGLXSingleReq *req = (xGLXSingleReq *)pc;
__GLX_DECLARE_SWAP_VARIABLES;
__GLX_SWAP_SHORT(&req->length);
__GLX_SWAP_INT(&req->contextTag);
swap_vec_element_size = 8;
/*
* swap extra data in request - assuming all data
* (if available) are arrays of 4 bytes components !
*/
if (req->length > sz_xGLXSingleReq/4) {
int *data = (int *)(req+1);
int count = req->length - sz_xGLXSingleReq/4;
__GLX_SWAP_INT_ARRAY(data, count );
}
return( __glXForwardPipe0WithReply( cl, pc ) );
}
int __glXForwardAllWithReplySwap( __GLXclientState *cl, GLbyte *pc )
{
xGLXSingleReq *req = (xGLXSingleReq *)pc;
__GLX_DECLARE_SWAP_VARIABLES;
__GLX_SWAP_SHORT(&req->length);
__GLX_SWAP_INT(&req->contextTag);
swap_vec_element_size = 0;
/*
* swap extra data in request - assuming all data
* (if available) are arrays of 4 bytes components !
*/
if (req->length > sz_xGLXSingleReq/4) {
int *data = (int *)(req+1);
int count = req->length - sz_xGLXSingleReq/4;
__GLX_SWAP_INT_ARRAY(data, count );
}
return( __glXForwardAllWithReply( cl, pc ) );
}
int __glXForwardAllWithReplySwapsv( __GLXclientState *cl, GLbyte *pc )
{
xGLXSingleReq *req = (xGLXSingleReq *)pc;
__GLX_DECLARE_SWAP_VARIABLES;
__GLX_SWAP_SHORT(&req->length);
__GLX_SWAP_INT(&req->contextTag);
swap_vec_element_size = 2;
/*
* swap extra data in request - assuming all data
* (if available) are arrays of 4 bytes components !
*/
if (req->length > sz_xGLXSingleReq/4) {
int *data = (int *)(req+1);
int count = req->length - sz_xGLXSingleReq/4;
__GLX_SWAP_INT_ARRAY(data, count );
}
return( __glXForwardAllWithReply( cl, pc ) );
}
int __glXForwardAllWithReplySwapiv( __GLXclientState *cl, GLbyte *pc )
{
xGLXSingleReq *req = (xGLXSingleReq *)pc;
__GLX_DECLARE_SWAP_VARIABLES;
__GLX_SWAP_SHORT(&req->length);
__GLX_SWAP_INT(&req->contextTag);
swap_vec_element_size = 4;
/*
* swap extra data in request - assuming all data
* (if available) are arrays of 4 bytes components !
*/
if (req->length > sz_xGLXSingleReq/4) {
int *data = (int *)(req+1);
int count = req->length - sz_xGLXSingleReq/4;
__GLX_SWAP_INT_ARRAY(data, count );
}
return( __glXForwardAllWithReply( cl, pc ) );
}
int __glXForwardAllWithReplySwapdv( __GLXclientState *cl, GLbyte *pc )
{
xGLXSingleReq *req = (xGLXSingleReq *)pc;
__GLX_DECLARE_SWAP_VARIABLES;
__GLX_SWAP_SHORT(&req->length);
__GLX_SWAP_INT(&req->contextTag);
swap_vec_element_size = 8;
/*
* swap extra data in request - assuming all data
* (if available) are arrays of 4 bytes components !
*/
if (req->length > sz_xGLXSingleReq/4) {
int *data = (int *)(req+1);
int count = req->length - sz_xGLXSingleReq/4;
__GLX_SWAP_INT_ARRAY(data, count );
}
return( __glXForwardAllWithReply( cl, pc ) );
}
static GLint __glReadPixels_size(GLenum format, GLenum type, GLint w, GLint h,
int *elementbits_return, int *rowbytes_return )
{
GLint elements, esize;
GLint rowsize, padding;
if (w < 0 || h < 0) {
return -1;
}
switch (format) {
case GL_COLOR_INDEX:
case GL_STENCIL_INDEX:
case GL_DEPTH_COMPONENT:
elements = 1;
break;
case GL_RED:
case GL_GREEN:
case GL_BLUE:
case GL_ALPHA:
case GL_LUMINANCE:
elements = 1;
break;
case GL_LUMINANCE_ALPHA:
elements = 2;
break;
case GL_RGB:
case GL_BGR:
elements = 3;
break;
case GL_RGBA:
case GL_BGRA:
case GL_ABGR_EXT:
elements = 4;
break;
default:
return -1;
}
/*
** According to the GLX protocol, each row must be padded to a multiple of
** 4 bytes. 4 bytes also happens to be the default alignment in the pixel
** store modes of the GL.
*/
switch (type) {
case GL_BITMAP:
if (format == GL_COLOR_INDEX || format == GL_STENCIL_INDEX) {
rowsize = ((w * elements)+7)/8;
padding = rowsize % 4;
if (padding) {
rowsize += 4 - padding;
}
if (elementbits_return) *elementbits_return = elements;
if (rowbytes_return) *rowbytes_return = rowsize;
return (rowsize * h);
} else {
return -1;
}
case GL_BYTE:
case GL_UNSIGNED_BYTE:
esize = 1;
break;
case GL_UNSIGNED_BYTE_3_3_2:
case GL_UNSIGNED_BYTE_2_3_3_REV:
esize = 1;
elements = 1;
break;
case GL_SHORT:
case GL_UNSIGNED_SHORT:
esize = 2;
break;
case GL_UNSIGNED_SHORT_5_6_5:
case GL_UNSIGNED_SHORT_5_6_5_REV:
case GL_UNSIGNED_SHORT_4_4_4_4:
case GL_UNSIGNED_SHORT_4_4_4_4_REV:
case GL_UNSIGNED_SHORT_5_5_5_1:
case GL_UNSIGNED_SHORT_1_5_5_5_REV:
esize = 2;
elements = 1;
break;
case GL_INT:
case GL_UNSIGNED_INT:
case GL_FLOAT:
esize = 4;
break;
case GL_UNSIGNED_INT_8_8_8_8:
case GL_UNSIGNED_INT_8_8_8_8_REV:
case GL_UNSIGNED_INT_10_10_10_2:
case GL_UNSIGNED_INT_2_10_10_10_REV:
esize = 4;
elements = 1;
break;
default:
return -1;
}
rowsize = w * elements * esize;
padding = rowsize % 4;
if (padding) {
rowsize += 4 - padding;
}
if (elementbits_return) *elementbits_return = esize*elements*8;
if (rowbytes_return) *rowbytes_return = rowsize;
return (rowsize * h);
}
static int intersectRect( int x1, int x2, int y1, int y2,
int X1, int X2, int Y1, int Y2,
int *ix1, int *ix2, int *iy1, int *iy2 )
{
int right = (x2 < X2 ? x2 : X2);
int bottom = (y2 < Y2 ? y2 : Y2);
int left = (x1 > X1 ? x1 : X1);
int top = (y1 > Y1 ? y1 : Y1);
int width = right - left + 1;
int height = bottom - top + 1;
if ( (width <= 0) || (height <= 0) ) {
*ix1 = *ix2 = *iy1 = *iy2 = 0;
return(0);
}
else {
*ix1 = left;
*ix2 = right;
*iy1 = top;
*iy2 = bottom;
return( width * height );
}
}
int __glXDisp_ReadPixels(__GLXclientState *cl, GLbyte *pc)
{
xGLXSingleReq *req = (xGLXSingleReq *)pc;
xGLXSingleReq *be_req;
xGLXReadPixelsReply reply;
xGLXReadPixelsReply be_reply;
GLbyte *be_pc;
GLint x,y;
GLsizei width, height;
GLenum format, type;
GLboolean swapBytes, lsbFirst;
ClientPtr client = cl->client;
DrawablePtr pDraw;
int error;
__GLXcontext *glxc;
int from_screen = 0;
int to_screen = 0;
char *buf;
int buf_size;
int s;
int win_x1, win_x2;
int win_y1, win_y2;
int ebits, rowsize;
__GLX_DECLARE_SWAP_VARIABLES;
if (client->swapped) {
__GLX_SWAP_INT(&req->contextTag);
}
glxc = __glXLookupContextByTag(cl, req->contextTag);
if (!glxc) {
return 0;
}
from_screen = to_screen = glxc->pScreen->myNum;
#ifdef PANORAMIX
if (!noPanoramiXExtension) {
from_screen = 0;
to_screen = screenInfo.numScreens - 1;
}
#endif
pc += sz_xGLXSingleReq;
x = *(GLint *)(pc + 0);
y = *(GLint *)(pc + 4);
width = *(GLsizei *)(pc + 8);
height = *(GLsizei *)(pc + 12);
format = *(GLenum *)(pc + 16);
type = *(GLenum *)(pc + 20);
swapBytes = *(GLboolean *)(pc + 24);
lsbFirst = *(GLboolean *)(pc + 25);
if (client->swapped) {
__GLX_SWAP_INT(&x);
__GLX_SWAP_INT(&y);
__GLX_SWAP_INT(&width);
__GLX_SWAP_INT(&height);
__GLX_SWAP_INT(&format);
__GLX_SWAP_INT(&type);
swapBytes = !swapBytes;
}
buf_size = __glReadPixels_size(format,type,width,height, &ebits, &rowsize);
if (buf_size > 0) {
buf = (char *) Xalloc( buf_size );
if ( !buf ) {
return( BadAlloc );
}
}
else {
buf_size = 0;
}
if (buf_size > 0) {
/*
* Get the current drawable this context is bound to
*/
pDraw = __glXLookupDrawableByTag( cl, req->contextTag );
win_x1 = pDraw->x + x;
win_x2 = win_x1 + width - 1;
win_y1 = (dmxGlobalHeight - pDraw->y - pDraw->height) + y;
win_y2 = win_y1 + height - 1;
if (pDraw->type != DRAWABLE_WINDOW) {
from_screen = to_screen = 0;
}
for (s=from_screen; s<=to_screen; s++) {
DMXScreenInfo *dmxScreen = &dmxScreens[s];
Display *dpy = GetBackEndDisplay(cl,s);
int scr_x1 = dmxScreen->rootXOrigin;
int scr_x2 = dmxScreen->rootXOrigin + dmxScreen->scrnWidth - 1;
int scr_y1 = dmxScreen->rootYOrigin;
int scr_y2 = dmxScreen->rootYOrigin + dmxScreen->scrnHeight - 1;
int wx1, wx2, wy1, wy2;
int sx, sy, sw, sh;
int npixels;
/*
* find the window portion that is on the current screen
*/
if (pDraw->type == DRAWABLE_WINDOW) {
npixels = intersectRect( scr_x1, scr_x2, scr_y1, scr_y2,
win_x1, win_x2, win_y1, win_y2,
&wx1, &wx2, &wy1, &wy2 );
}
else {
wx1 = win_x1;
wx2 = win_x2;
wy1 = win_y1;
wy2 = win_y2;
npixels = (wx2-wx1+1) * (wy2-wy1+1);
}
if (npixels > 0) {
/* send the request to the back-end server */
LockDisplay(dpy);
GetReqExtra(GLXSingle,__GLX_PAD(26),be_req);
be_req->reqType = dmxScreen->glxMajorOpcode;
be_req->glxCode = X_GLsop_ReadPixels;
be_req->contextTag = GetCurrentBackEndTag(cl,req->contextTag,s);
be_pc = ((GLbyte *)(be_req) + sz_xGLXSingleReq);
sx = wx1 - pDraw->x;
sy = wy1 - (dmxGlobalHeight - pDraw->y - pDraw->height);
sw = (wx2-wx1+1);
sh = (wy2-wy1+1);
*(GLint *)(be_pc + 0) = sx; /* x */
*(GLint *)(be_pc + 4) = sy; /* y */
*(GLsizei *)(be_pc + 8) = sw; /* width */
*(GLsizei *)(be_pc + 12) = sh; /* height */
*(GLenum *)(be_pc + 16) = format;
*(GLenum *)(be_pc + 20) = type;
*(GLboolean *)(be_pc + 24) = swapBytes;
*(GLboolean *)(be_pc + 25) = lsbFirst;
_XReply(dpy, (xReply*) &be_reply, 0, False);
if (be_reply.length > 0) {
char *be_buf;
int be_buf_size = be_reply.length << 2;
be_buf = (char *) Xalloc( be_buf_size );
if (be_buf) {
_XRead(dpy, be_buf, be_buf_size);
/* copy pixels data to the right location of the */
/* reply buffer */
if ( type != GL_BITMAP ) {
int pbytes = ebits / 8;
char *dst = buf + (sy-y)*rowsize + (sx-x)*pbytes;
char *src = be_buf;
int pad = (pbytes * sw) % 4;
int r;
for (r=0; r<sh; r++) {
memcpy( dst, src, pbytes*sw );
dst += rowsize;
src += (pbytes*sw + (pad ? 4-pad : 0) );
}
}
else {
/* this is a GL_BITMAP pixel type, should copy bits */
int r;
int src_rowsize = ((sw * ebits) + 7) / 8;
int src_pad = src_rowsize % 4;
if ( src_pad ) {
src_rowsize += (4 - src_pad);
}
for (r=0; r<sh; r++) {
unsigned char dst_mask = 0x80 >> (sx % 8);
unsigned char src_mask = 0x80;
char *dst = buf + (sy-y+r)*rowsize + (sx-x)/8;
char *src = be_buf + r*src_rowsize;
int b;
for (b=0; b<sw*ebits; b++) {
if ( *src & src_mask ) {
*dst |= dst_mask;
}
else {
*dst &= ~dst_mask;
}
if (dst_mask > 1) dst_mask >>= 1;
else {
dst_mask = 0x80;
dst++;
}
if (src_mask > 1) src_mask >>= 1;
else {
src_mask = 0x80;
src++;
}
}
}
}
Xfree( be_buf );
}
else {
/* Throw data on the floor */
_XEatData(dpy, be_buf_size);
Xfree( buf );
return BadAlloc;
}
}
UnlockDisplay(dpy);
SyncHandle();
} /* of npixels > 0 */
} /* of for loop */
} /* of if buf_size > 0 */
reply.type = X_Reply;
reply.sequenceNumber = client->sequence;
reply.length = buf_size >> 2;
if (client->swapped) {
__GLX_SWAP_SHORT(&reply.sequenceNumber);
__GLX_SWAP_INT(&reply.length);
}
WriteToClient(client, sizeof(xGLXReadPixelsReply),(char *)&reply);
if (buf_size > 0) {
WriteToClient(client, buf_size, (char *)buf);
Xfree( buf );
}
return Success;
}
int __glXDispSwap_GetTexImage(__GLXclientState *cl, GLbyte *pc)
{
__GLX_DECLARE_SWAP_VARIABLES;
GLbyte *lpc = pc;
lpc += sz_xGLXSingleReq;
__GLX_SWAP_INT(lpc+0);
__GLX_SWAP_INT(lpc+4);
__GLX_SWAP_INT(lpc+8);
__GLX_SWAP_INT(lpc+12);
/* reverse swapBytes */
*(GLboolean *)(lpc + 16) = ! *(GLboolean *)(lpc + 16);
return( __glXForwardPipe0WithReplySwap( cl, pc ) );
}
int __glXDispSwap_GetColorTable(__GLXclientState *cl, GLbyte *pc)
{
__GLX_DECLARE_SWAP_VARIABLES;
GLbyte *lpc = pc;
lpc += sz_xGLXSingleReq;
__GLX_SWAP_INT(lpc+0);
__GLX_SWAP_INT(lpc+4);
__GLX_SWAP_INT(lpc+8);
/* reverse swapBytes */
*(GLboolean *)(lpc + 12) = ! *(GLboolean *)(lpc + 12);
return( __glXForwardPipe0WithReplySwap( cl, pc ) );
}
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