diff options
Diffstat (limited to 'src/gallium/winsys/xlib/xm_api.c')
| -rw-r--r-- | src/gallium/winsys/xlib/xm_api.c | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/src/gallium/winsys/xlib/xm_api.c b/src/gallium/winsys/xlib/xm_api.c index e5fef1d7a81..a82d3c990e7 100644 --- a/src/gallium/winsys/xlib/xm_api.c +++ b/src/gallium/winsys/xlib/xm_api.c @@ -104,12 +104,16 @@ static int host_byte_order( void ) * 1 = shared XImage support available * 2 = shared Pixmap support available also */ -static int check_for_xshm( XMesaDisplay *display ) +int xmesa_check_for_xshm( XMesaDisplay *display ) { #if defined(USE_XSHM) && !defined(XFree86Server) int major, minor, ignore; Bool pixmaps; + if (getenv("MESA_NOSHM")) { + return 0; + } + if (XQueryExtension( display, "MIT-SHM", &ignore, &ignore, &ignore )) { if (XShmQueryVersion( display, &major, &minor, &pixmaps )==True) { return (pixmaps==True) ? 2 : 1; @@ -507,6 +511,14 @@ initialize_visual_and_buffer(XMesaVisual v, XMesaBuffer b, return GL_FALSE; } v->mesa_visual.indexBits = 0; + + if (v->BitsPerPixel == 32) { + /* We use XImages for all front/back buffers. If an X Window or + * X Pixmap is 32bpp, there's no guarantee that the alpha channel + * will be preserved. For XImages we're in luck. + */ + v->mesa_visual.alphaBits = 8; + } } /* @@ -528,7 +540,7 @@ initialize_visual_and_buffer(XMesaVisual v, XMesaBuffer b, /* Setup for single/double buffering */ if (v->mesa_visual.doubleBufferMode) { /* Double buffered */ - b->shm = check_for_xshm( v->display ); + b->shm = xmesa_check_for_xshm( v->display ); } /* X11 graphics context */ @@ -770,13 +782,16 @@ XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) pf = choose_pixel_format(v); assert(pf); + c->xm_visual = v; + c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ + if (!getenv("XM_AUB")) { xmesa_mode = XMESA_SOFTPIPE; pipe = xmesa_create_pipe_context( c, pf ); } else { xmesa_mode = XMESA_AUB; - pipe = xmesa_create_i965simple( xmesa_get_pipe_winsys_aub() ); + pipe = xmesa_create_i965simple(xmesa_get_pipe_winsys_aub(v)); } c->st = st_create_context(pipe, &v->mesa_visual, @@ -800,9 +815,6 @@ XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list ) #endif /* finish up xmesa context initializations */ - c->xm_visual = v; - c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */ - c->st->haveFramebufferSurfaces = GL_TRUE; return c; |