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
31 CARD32
__glXReadReply(Display * dpy,size_t size,void * dest,GLboolean reply_is_always_array)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
57 void
__glXReadPixelReply(Display * dpy,struct glx_context * gc,unsigned max_dim,GLint width,GLint height,GLint depth,GLenum format,GLenum type,void * dest,GLboolean dimensions_in_reply)58 __glXReadPixelReply(Display * dpy, struct glx_context * 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
103 GLubyte *
104 __glXSetupSingleRequest(struct glx_context * 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
119 GLubyte *
__glXSetupVendorRequest(struct glx_context * gc,GLint code,GLint vop,GLint cmdlen)120 __glXSetupVendorRequest(struct glx_context * 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