Mercurial > sdl-ios-xcode
annotate docs/man3/SDL_LockSurface.3 @ 5129:32f0f603a0c8 SDL-1.2
Fixed bug #1111
kwm@rainbow-runner.nl 2011-01-30 06:28:27 PST
When building sdl 1.2.14 with the Clang compiler http://clang.llvm.org .
The build fails in src/video/mmx.h with the following error:
--------------------------------------------------
./src/video/SDL_RLEaccel.c:831:5: error: invalid operand for instruction
CHOOSE_BLIT(RLECLIPBLIT, alpha, fmt);
^
./src/video/SDL_RLEaccel.c:831:17: note: instantiated from:
CHOOSE_BLIT(RLECLIPBLIT, alpha, fmt);
^
./src/video/SDL_RLEaccel.c:831:5: note: instantiated from:
CHOOSE_BLIT(RLECLIPBLIT, alpha, fmt);
^
./src/video/SDL_RLEaccel.c:647:23: note: instantiated from:
blitter(2, Uint8, ALPHA_BLIT16_565MMX); \
^
./src/video/SDL_RLEaccel.c:282:4: note: instantiated from:
movq_r2m(mm3, *dstp); \
^
In file included from ./src/video/SDL_RLEaccel.c:99:
./src/video/mmx.h:379:28: note: instantiated from:
#define movq_r2m(reg, var) mmx_r2m(movq, reg, var)
^
<scratch space>:192:1: note: instantiated from:
"movq"
^
<inline asm>:1:2: note: instantiated into assembly here
movq %mm3, %dx
^
--------------------------------------------------
According to the clang developers this is a invalid inline assembly.
Using the attached patch from the last commit in the below bug report fixes the
compile.
More details from: http://llvm.org/bugs/show_bug.cgi?id=6730
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Sun, 30 Jan 2011 13:38:57 -0800 |
parents | 1238da4a7112 |
children |
rev | line source |
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181
e5bc29de3f0a
Updated from the SDL Documentation Project
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
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1 .TH "SDL_LockSurface" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference" |
0 | 2 .SH "NAME" |
4107
4e3b250c950e
Erik Heckers fixed bug #493
Sam Lantinga <slouken@libsdl.org>
parents:
181
diff
changeset
|
3 SDL_LockSurface \- Lock a surface for directly access\&. |
0 | 4 .SH "SYNOPSIS" |
5 .PP | |
6 \fB#include "SDL\&.h" | |
7 .sp | |
8 \fBint \fBSDL_LockSurface\fP\fR(\fBSDL_Surface *surface\fR); | |
9 .SH "DESCRIPTION" | |
10 .PP | |
11 \fBSDL_LockSurface\fP sets up a surface for directly accessing the pixels\&. Between calls to \fBSDL_LockSurface\fP and \fBSDL_UnlockSurface\fP, you can write to and read from \fBsurface->\fBpixels\fR\fR, using the pixel format stored in \fBsurface->\fBformat\fR\fR\&. Once you are done accessing the surface, you should use \fBSDL_UnlockSurface\fP to release it\&. | |
12 .PP | |
13 Not all surfaces require locking\&. If \fBSDL_MUSTLOCK\fP(\fBsurface\fR) evaluates to \fB0\fR, then you can read and write to the surface at any time, and the pixel format of the surface will not change\&. | |
14 .PP | |
15 No operating system or library calls should be made between lock/unlock pairs, as critical system locks may be held during this time\&. | |
16 .PP | |
17 It should be noted, that since SDL 1\&.1\&.8 surface locks are recursive\&. This means that you can lock a surface multiple times, but each lock must have a match unlock\&. | |
18 .PP | |
19 .nf | |
20 \f(CW \&. | |
21 \&. | |
22 SDL_LockSurface( surface ); | |
23 \&. | |
24 /* Surface is locked */ | |
25 /* Direct pixel access on surface here */ | |
26 \&. | |
27 SDL_LockSurface( surface ); | |
28 \&. | |
29 /* More direct pixel access on surface */ | |
30 \&. | |
31 SDL_UnlockSurface( surface ); | |
32 /* Surface is still locked */ | |
33 /* Note: Is versions < 1\&.1\&.8, the surface would have been */ | |
34 /* no longer locked at this stage */ | |
35 \&. | |
36 SDL_UnlockSurface( surface ); | |
37 /* Surface is now unlocked */ | |
38 \&. | |
39 \&.\fR | |
40 .fi | |
41 .PP | |
42 .SH "RETURN VALUE" | |
43 .PP | |
44 \fBSDL_LockSurface\fP returns \fB0\fR, or \fB-1\fR if the surface couldn\&'t be locked\&. | |
45 .SH "SEE ALSO" | |
46 .PP | |
47 \fI\fBSDL_UnlockSurface\fP\fR | |
4311
1238da4a7112
Debian patch: f230_manpages.diff
Sam Lantinga <slouken@libsdl.org>
parents:
4107
diff
changeset
|
48 .\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01 |