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xserver/hw/dmx/glxProxy/glxsingle.c

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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"
#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 = NULL;
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 *) malloc(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)
free(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 = NULL;
int be_buf_size = 0;
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 *) malloc(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) {
free(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)
free(be_buf);
return Success;
}
int
__glXForwardSingleReqSwap(__GLXclientState * cl, GLbyte * pc)
{
xGLXSingleReq *req = (xGLXSingleReq *) pc;
__GLX_DECLARE_SWAP_VARIABLES;
__GLX_DECLARE_SWAP_ARRAY_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_DECLARE_SWAP_ARRAY_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_DECLARE_SWAP_ARRAY_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_DECLARE_SWAP_ARRAY_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_DECLARE_SWAP_ARRAY_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_DECLARE_SWAP_ARRAY_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_DECLARE_SWAP_ARRAY_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_DECLARE_SWAP_ARRAY_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_DECLARE_SWAP_ARRAY_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;
__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 *) malloc(buf_size);
if (!buf) {
return BadAlloc;
}
}
else {
buf_size = 0;
buf = NULL;
}
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 *) malloc(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 = bits_to_bytes(sw * ebits);
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++;
}
}
}
}
free(be_buf);
}
else {
/* Throw data on the floor */
_XEatData(dpy, be_buf_size);
free(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);
free(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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