Mercurial > sdl-ios-xcode
view docs/man3/SDL_VideoInfo.3 @ 1555:780fd5b61df1
Fixed bug #89
Date: Sun, 23 Oct 2005 16:39:03 +0200
From: "A. Schmid" <sahib@phreaker.net>
Subject: [SDL] no software surfaces with svgalib driver?
Hi,
I noticed that the SDL (1.2.9) svgalib driver only makes use of linear
addressable (framebuffer) video modes. On older systems (like one of
mine), linear addressable modes are often not available.
Especially for cards with VESA VBE < 2.0 the svgalib vesa driver is
unusable, since VESA only supports framebuffering for VBE 2.0 and later.
The changes necessary to add support for software surfaces seem to be
relatively small. I only had to hack src/video/svga/SDL_svgavideo.c (see
attached patch). The code worked fine for me, but it is no more than a
proof of concept and should be reviewed (probably has a memory leak when
switching modes). It also uses the vgagl library (included in the
svgalib package) and needs to be linked against it.
-Alex
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Sun, 19 Mar 2006 12:05:16 +0000 |
parents | e5bc29de3f0a |
children | 546f7c1eb755 |
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.TH "SDL_VideoInfo" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference" .SH "NAME" SDL_VideoInfo\- Video Target information .SH "STRUCTURE DEFINITION" .PP .nf \f(CWtypedef struct{ Uint32 hw_available:1; Uint32 wm_available:1; Uint32 blit_hw:1; Uint32 blit_hw_CC:1; Uint32 blit_hw_A:1; Uint32 blit_sw:1; Uint32 blit_sw_CC:1; Uint32 blit_sw_A:1; Uint32 blit_fill; Uint32 video_mem; SDL_PixelFormat *vfmt; } SDL_VideoInfo;\fR .fi .PP .SH "STRUCTURE DATA" .TP 20 \fBhw_available\fR Is it possible to create hardware surfaces? .TP 20 \fBwm_available\fR Is there a window manager available .TP 20 \fBblit_hw\fR Are hardware to hardware blits accelerated? .TP 20 \fBblit_hw_CC\fR Are hardware to hardware colorkey blits accelerated? .TP 20 \fBblit_hw_A\fR Are hardware to hardware alpha blits accelerated? .TP 20 \fBblit_sw\fR Are software to hardware blits accelerated? .TP 20 \fBblit_sw_CC\fR Are software to hardware colorkey blits accelerated? .TP 20 \fBblit_sw_A\fR Are software to hardware alpha blits accelerated? .TP 20 \fBblit_fill\fR Are color fills accelerated? .TP 20 \fBvideo_mem\fR Total amount of video memory in Kilobytes .TP 20 \fBvfmt\fR \fIPixel format\fR of the video device .SH "DESCRIPTION" .PP 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\&. .SH "SEE ALSO" .PP \fI\fBSDL_PixelFormat\fR\fR, \fI\fBSDL_GetVideoInfo\fP\fR ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01