/* _xdga2_scroll_screen:
* Scrolls DGA viewport.
*/
static int _xdga2_scroll_screen(int x, int y)
{
if (x < 0) x = 0;
else if (x > dga_device->mode.maxViewportX)
x = dga_device->mode.maxViewportX;
if (y < 0) y = 0;
else if (y > dga_device->mode.maxViewportY)
y = dga_device->mode.maxViewportY;
if ((_xwin.scroll_x == x) && (_xwin.scroll_y == y))
return 0;
XLOCK();
_xwin.scroll_x = x;
_xwin.scroll_y = y;
if (_wait_for_vsync)
while (XDGAGetViewportStatus(_xwin.display, _xwin.screen))
;
XDGASetViewport(_xwin.display, _xwin.screen, x, y, XDGAFlipRetrace);
XUNLOCK();
return 0;
}
/* _xdga2_poll_scroll:
* Returns true if there are pending scrolling requests left.
*/
static int _xdga2_poll_scroll(void)
{
int result;
XLOCK();
result = XDGAGetViewportStatus(_xwin.display, _xwin.screen);
XUNLOCK();
return result;
}
const char *xf86_dga2_update_display(mame_bitmap *bitmap,
rectangle *vis_area, rectangle *dirty_area,
struct sysdep_palette_struct *palette, int flags)
{
rectangle my_dirty_area = *dirty_area;
if (xf86ctx.max_page)
{
/* force a full screen update */
if (xf86ctx.page_dirty)
{
my_dirty_area = *vis_area;
xf86ctx.page_dirty--;
}
while(XDGAGetViewportStatus(display, xf86ctx.screen) & (0x01 <<
(xf86ctx.max_page - 1)))
{
}
}
xf86ctx.page = (xf86ctx.page + 1) % (xf86ctx.max_page + 1);
xf86ctx.update_display_func(bitmap, vis_area, &my_dirty_area,
palette, xf86ctx.addr + xf86ctx.aligned_viewport_height *
xf86ctx.page * xf86ctx.device->mode.bytesPerScanline, xf86ctx.width);
if (xf86ctx.max_page)
{
XDGASetViewport(display, xf86ctx. screen, 0, xf86ctx.page *
xf86ctx.aligned_viewport_height, XDGAFlipRetrace);
/* If the dirty area has changed force a fullscreen update the next
max_page updates, so that it gets updated in all pages */
if (memcmp(&xf86ctx.old_dirty_area, dirty_area, sizeof(xf86ctx.old_dirty_area)))
{
xf86ctx.old_dirty_area = *dirty_area;
xf86ctx.page_dirty = xf86ctx.max_page;
}
}
XDGASync(display,xf86ctx.screen);
return NULL;
}
static int xf86_dga2_set_mode(void)
{
int bestmode = xf86_dga_vidmode_find_best_vidmode();
if (bestmode == -1)
{
fprintf(stderr,"no suitable mode found\n");
return 1;
}
if (bestmode != xf86ctx.current_mode)
{
if(xf86ctx.device)
XFree(xf86ctx.device);
xf86ctx.device = XDGASetMode(display,xf86ctx.screen,bestmode);
if (xf86ctx.device == NULL) {
fprintf(stderr,"XDGASetMode failed\n");
return 1;
}
xf86ctx.width = xf86ctx.device->mode.bytesPerScanline * 8 /
xf86ctx.device->mode.bitsPerPixel;
xf86ctx.current_mode = bestmode;
#if 0 /* DEBUG */
fprintf(stderr, "Debug: bitmap_depth =%d mode.bitsPerPixel = %d"
" mode.depth = %d\n", bitmap_depth,
xf86ctx.device->mode.bitsPerPixel,
xf86ctx.device->mode.depth);
#endif
fprintf(stderr,"XF86DGA2 switched To Mode: %d x %d\n",
xf86ctx.device->mode.viewportWidth,
xf86ctx.device->mode.viewportHeight);
mode_set_aspect_ratio((double)xf86ctx.device->mode.viewportWidth/
xf86ctx.device->mode.viewportHeight);
/* setup the viewport */
XDGASetViewport(display,xf86ctx.screen,0,0,0);
while(XDGAGetViewportStatus(display, xf86ctx.screen))
;
/* setup page flipping */
if(xf86ctx.device->mode.viewportFlags & XDGAFlipRetrace)
{
xf86ctx.aligned_viewport_height =
(xf86ctx.device->mode.viewportHeight+
xf86ctx.device->mode.yViewportStep-1) &
~(xf86ctx.device->mode.yViewportStep-1);
xf86ctx.page = 0;
xf86ctx.max_page = xf86ctx.device->mode.maxViewportY /
xf86ctx.aligned_viewport_height;
if (xf86ctx.max_page > xf86ctx.max_page_limit)
xf86ctx.max_page = xf86ctx.max_page_limit;
if (xf86ctx.max_page)
fprintf(stderr,
"DGA using vsynced page flipping, hw-buffering max %d frames\n",
xf86ctx.max_page);
}
else
xf86ctx.max_page = 0;
/* fill the sysdep_display_properties struct */
memset(&sysdep_display_properties.palette_info, 0, sizeof(struct
sysdep_palette_info));
sysdep_display_properties.palette_info.red_mask = xf86ctx.device->mode.redMask;
sysdep_display_properties.palette_info.green_mask = xf86ctx.device->mode.greenMask;
sysdep_display_properties.palette_info.blue_mask = xf86ctx.device->mode.blueMask;
sysdep_display_properties.palette_info.depth = xf86ctx.device->mode.depth;
sysdep_display_properties.palette_info.bpp = xf86ctx.device->mode.bitsPerPixel;
sysdep_display_properties.vector_renderer = NULL;
}
if(xf86_dga_setup_graphics(xf86ctx.device->mode))
return 1;
/* get a blit function */
return !(xf86ctx.update_display_func=sysdep_display_effect_open());
}
