Mercurial > sdl-ios-xcode
annotate docs/man3/SDL_VideoInfo.3 @ 2042:3908e1f808e1
Fixed bug #292
I might be on crack here.
It looks like SDL_ConvertMono() in src/audio/SDL_audiocvt.c adds the left and
right channels of a stereo stream together, and clamps the new mono channel if
it would overflow.
Shouldn't it be dividing by 2 to average the two sample points instead of
clamping? Otherwise the mono sample point's volume doubles in the conversion.
This would also make the conversion faster, as it replaces two branches per
sample frame with a bitwise shift.
--ryan.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 24 Sep 2006 15:56:36 +0000 |
| parents | e5bc29de3f0a |
| children | 546f7c1eb755 |
| rev | line source |
|---|---|
|
181
e5bc29de3f0a
Updated from the SDL Documentation Project
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
1 .TH "SDL_VideoInfo" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference" |
| 0 | 2 .SH "NAME" |
| 3 SDL_VideoInfo\- Video Target information | |
| 4 .SH "STRUCTURE DEFINITION" | |
| 5 .PP | |
| 6 .nf | |
| 7 \f(CWtypedef struct{ | |
| 8 Uint32 hw_available:1; | |
| 9 Uint32 wm_available:1; | |
| 10 Uint32 blit_hw:1; | |
| 11 Uint32 blit_hw_CC:1; | |
| 12 Uint32 blit_hw_A:1; | |
| 13 Uint32 blit_sw:1; | |
| 14 Uint32 blit_sw_CC:1; | |
| 15 Uint32 blit_sw_A:1; | |
| 16 Uint32 blit_fill; | |
| 17 Uint32 video_mem; | |
| 18 SDL_PixelFormat *vfmt; | |
| 19 } SDL_VideoInfo;\fR | |
| 20 .fi | |
| 21 .PP | |
| 22 .SH "STRUCTURE DATA" | |
| 23 .TP 20 | |
| 24 \fBhw_available\fR | |
| 25 Is it possible to create hardware surfaces? | |
| 26 .TP 20 | |
| 27 \fBwm_available\fR | |
| 28 Is there a window manager available | |
| 29 .TP 20 | |
| 30 \fBblit_hw\fR | |
| 31 Are hardware to hardware blits accelerated? | |
| 32 .TP 20 | |
| 33 \fBblit_hw_CC\fR | |
| 34 Are hardware to hardware colorkey blits accelerated? | |
| 35 .TP 20 | |
| 36 \fBblit_hw_A\fR | |
| 37 Are hardware to hardware alpha blits accelerated? | |
| 38 .TP 20 | |
| 39 \fBblit_sw\fR | |
| 40 Are software to hardware blits accelerated? | |
| 41 .TP 20 | |
| 42 \fBblit_sw_CC\fR | |
| 43 Are software to hardware colorkey blits accelerated? | |
| 44 .TP 20 | |
| 45 \fBblit_sw_A\fR | |
| 46 Are software to hardware alpha blits accelerated? | |
| 47 .TP 20 | |
| 48 \fBblit_fill\fR | |
| 49 Are color fills accelerated? | |
| 50 .TP 20 | |
| 51 \fBvideo_mem\fR | |
| 52 Total amount of video memory in Kilobytes | |
| 53 .TP 20 | |
| 54 \fBvfmt\fR | |
| 55 \fIPixel format\fR of the video device | |
| 56 .SH "DESCRIPTION" | |
| 57 .PP | |
| 58 This (read-only) structure is returned by \fI\fBSDL_GetVideoInfo\fP\fR\&. It contains information on either the \&'best\&' available mode (if called before \fI\fBSDL_SetVideoMode\fP\fR) or the current video mode\&. | |
| 59 .SH "SEE ALSO" | |
| 60 .PP | |
| 61 \fI\fBSDL_PixelFormat\fR\fR, \fI\fBSDL_GetVideoInfo\fP\fR | |
|
181
e5bc29de3f0a
Updated from the SDL Documentation Project
Sam Lantinga <slouken@libsdl.org>
parents:
55
diff
changeset
|
62 ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01 |