glxreply.c revision 0594cf70883b64692ba617d85f4f9b4e636e5c2b 
1/*
2 * (C) Copyright Apple Inc. 2008
3 * (C) Copyright IBM Corporation 2004, 2005
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sub license,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the next
14 * paragraph) shall be included in all copies or substantial portions of the
15 * Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
20 * IBM,
21 * AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
22 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
23 * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
24 * SOFTWARE.
25 */
26
27#include <GL/gl.h>
28#include "glxclient.h"
29#include <GL/glxproto.h>
30
31CARD32
32__glXReadReply(Display * dpy, size_t size, void *dest,
33               GLboolean reply_is_always_array)
34{
35   xGLXSingleReply reply;
36
37   (void) _XReply(dpy, (xReply *) & reply, 0, False);
38   if (size != 0) {
39      if ((reply.length > 0) || reply_is_always_array) {
40         const GLint bytes = (reply_is_always_array)
41            ? (4 * reply.length) : (reply.size * size);
42         const GLint extra = 4 - (bytes & 3);
43
44         _XRead(dpy, dest, bytes);
45         if (extra < 4) {
46            _XEatData(dpy, extra);
47         }
48      }
49      else {
50         (void) memcpy(dest, &(reply.pad3), size);
51      }
52   }
53
54   return reply.retval;
55}
56
57void
58__glXReadPixelReply(Display * dpy, __GLXcontext * gc, unsigned max_dim,
59                    GLint width, GLint height, GLint depth, GLenum format,
60                    GLenum type, void *dest, GLboolean dimensions_in_reply)
61{
62   xGLXSingleReply reply;
63   GLint size;
64
65   (void) _XReply(dpy, (xReply *) & reply, 0, False);
66
67   if (dimensions_in_reply) {
68      width = reply.pad3;
69      height = reply.pad4;
70      depth = reply.pad5;
71
72      if ((height == 0) || (max_dim < 2)) {
73         height = 1;
74      }
75      if ((depth == 0) || (max_dim < 3)) {
76         depth = 1;
77      }
78   }
79
80   size = reply.length * 4;
81   if (size != 0) {
82      void *buf = Xmalloc(size);
83
84      if (buf == NULL) {
85         _XEatData(dpy, size);
86         __glXSetError(gc, GL_OUT_OF_MEMORY);
87      }
88      else {
89         const GLint extra = 4 - (size & 3);
90
91         _XRead(dpy, buf, size);
92         if (extra < 4) {
93            _XEatData(dpy, extra);
94         }
95
96         __glEmptyImage(gc, 3, width, height, depth, format, type, buf, dest);
97         Xfree(buf);
98      }
99   }
100}
101
102#if 0
103GLubyte *
104__glXSetupSingleRequest(__GLXcontext * gc, GLint sop, GLint cmdlen)
105{
106   xGLXSingleReq *req;
107   Display *const dpy = gc->currentDpy;
108
109   (void) __glXFlushRenderBuffer(gc, gc->pc);
110   LockDisplay(dpy);
111   GetReqExtra(GLXSingle, cmdlen, req);
112   req->reqType = gc->majorOpcode;
113   req->contextTag = gc->currentContextTag;
114   req->glxCode = sop;
115   return (GLubyte *) (req) + sz_xGLXSingleReq;
116}
117#endif
118
119GLubyte *
120__glXSetupVendorRequest(__GLXcontext * gc, GLint code, GLint vop,
121                        GLint cmdlen)
122{
123   xGLXVendorPrivateReq *req;
124   Display *const dpy = gc->currentDpy;
125
126   (void) __glXFlushRenderBuffer(gc, gc->pc);
127   LockDisplay(dpy);
128   GetReqExtra(GLXVendorPrivate, cmdlen, req);
129   req->reqType = gc->majorOpcode;
130   req->glxCode = code;
131   req->vendorCode = vop;
132   req->contextTag = gc->currentContextTag;
133   return (GLubyte *) (req) + sz_xGLXVendorPrivateReq;
134}
135