annotate docs/man3/SDL_Overlay.3 @ 914:bbf8dcc8aed6

Date: Wed, 23 Jun 2004 17:05:33 -0400 From: Chris Nelson Subject: [SDL] [Patch] WiseGroup MP-8800 / MP-8866 (PS2 Joystick) In the current cvs version, SDL doesn't handle these Playstation2 controller => USB adapters correctly, in linux. It will always assume that the maximum number of joysticks (2 in the case of the MP-8866, 4 in the case of the 8800) are plugged in. This is bad not only because it allows SDL to exaggerate the number of logical joysticks, but primarily because the joystick axes are mapped incorrectly, all over the place, such that the devices are effectively unusable unless you have the maximum number of joysticks plugged in. My changes to src/joystick/linux/SDL_sysjoystick.c build on another's previous work (which was a special case for this very joystick, actually), and fix both of these problems, as well as making the current code a little more general, to allow for others to more easily drop in code for quirky joysticks such as these. I've tested this code under 2.6.7 as well as 2.4.24... Both work as advertised (provided you load the JOYDEV linux code as a module, otherwise they won't work at all, new code or old, but that's another issue entirely). Though this sounds horribly formal, you have my permission to distribute all of my work on this issue under the LGPL. So there.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 25 Jul 2004 18:31:50 +0000
parents e5bc29de3f0a
children 546f7c1eb755
rev   line source
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1 .TH "SDL_Overlay" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference"
0
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2 .SH "NAME"
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3 SDL_Overlay\- YUV video overlay
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4 .SH "STRUCTURE DEFINITION"
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5 .PP
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6 .nf
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7 \f(CWtypedef struct{
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8 Uint32 format;
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9 int w, h;
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10 int planes;
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11 Uint16 *pitches;
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12 Uint8 **pixels;
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13 Uint32 hw_overlay:1;
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14 } SDL_Overlay;\fR
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15 .fi
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16 .PP
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17 .SH "STRUCTURE DATA"
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18 .TP 20
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19 \fBformat\fR
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20 Overlay format (see below)
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21 .TP 20
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22 \fBw, h\fR
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23 Width and height of overlay
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24 .TP 20
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25 \fBplanes\fR
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26 Number of planes in the overlay\&. Usually either 1 or 3
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27 .TP 20
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28 \fBpitches\fR
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29 An array of pitches, one for each plane\&. Pitch is the length of a row in bytes\&.
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30 .TP 20
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31 \fBpixels\fR
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32 An array of pointers to teh data of each plane\&. The overlay should be locked before these pointers are used\&.
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33 .TP 20
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34 \fBhw_overlay\fR
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35 This will be set to 1 if the overlay is hardware accelerated\&.
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36 .SH "DESCRIPTION"
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37 .PP
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38 A \fBSDL_Overlay\fR is similar to a \fI\fBSDL_Surface\fR\fR except it stores a YUV overlay\&. All the fields are read only, except for \fBpixels\fR which should be \fIlocked\fR before use\&. The \fBformat\fR field stores the format of the overlay which is one of the following:
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39 .PP
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40 .nf
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41 \f(CW#define SDL_YV12_OVERLAY 0x32315659 /* Planar mode: Y + V + U */
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42 #define SDL_IYUV_OVERLAY 0x56555949 /* Planar mode: Y + U + V */
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43 #define SDL_YUY2_OVERLAY 0x32595559 /* Packed mode: Y0+U0+Y1+V0 */
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44 #define SDL_UYVY_OVERLAY 0x59565955 /* Packed mode: U0+Y0+V0+Y1 */
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45 #define SDL_YVYU_OVERLAY 0x55595659 /* Packed mode: Y0+V0+Y1+U0 */\fR
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46 .fi
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47 .PP
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48 More information on YUV formats can be found at \fIhttp://www\&.webartz\&.com/fourcc/indexyuv\&.htm (link to URL http://www.webartz.com/fourcc/indexyuv.htm) \fR\&.
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49 .SH "SEE ALSO"
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50 .PP
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51 \fI\fBSDL_CreateYUVOverlay\fP\fR, \fI\fBSDL_LockYUVOverlay\fP\fR, \fI\fBSDL_UnlockYUVOverlay\fP\fR, \fI\fBSDL_FreeYUVOverlay\fP\fR
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52 ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01