setmode.c revision ae5fc6ddd3d2ccdb941b1aacd23f6791fecc3354
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * Linux Additions X11 graphics driver, mode setting
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * Copyright (C) 2006-2010 Oracle Corporation
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * This file is part of VirtualBox Open Source Edition (OSE), as
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * available from http://www.virtualbox.org. This file is free software;
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * you can redistribute it and/or modify it under the terms of the GNU
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * General Public License (GPL) as published by the Free Software
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * Foundation, in version 2 as it comes in the "COPYING" file of the
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * --------------------------------------------------------------------
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * This code is based on:
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * X11 VESA driver
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * Copyright (c) 2000 by Conectiva S.A. (http://www.conectiva.com)
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * Permission is hereby granted, free of charge, to any person obtaining a
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * copy of this software and associated documentation files (the "Software"),
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * to deal in the Software without restriction, including without limitation
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * the rights to use, copy, modify, merge, publish, distribute, sublicense,
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * and/or sell copies of the Software, and to permit persons to whom the
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * Software is furnished to do so, subject to the following conditions:
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * The above copyright notice and this permission notice shall be included in
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * all copies or substantial portions of the Software.
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * CONECTIVA LINUX BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * SOFTWARE.
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * Except as contained in this notice, the name of Conectiva Linux shall
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * not be used in advertising or otherwise to promote the sale, use or other
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * dealings in this Software without prior written authorization from
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * Conectiva Linux.
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * Authors: Paulo César Pereira de Andrade <pcpa@conectiva.com.br>
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync/* VGA hardware functions for setting and restoring text mode */
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync/** Clear the virtual framebuffer in VRAM. Optionally also clear up to the
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * size of a new framebuffer. Framebuffer sizes larger than available VRAM
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * be treated as zero and passed over. */
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsyncvoid vboxClearVRAM(ScrnInfoPtr pScrn, int32_t cNewX, int32_t cNewY)
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync/** Set a graphics mode. Poke any required values into registers, do an HGSMI
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * mode set and tell the host we support advanced graphics functions. This
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * procedure is complicated by the fact that X.Org can implicitly disable a
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * screen by resizing the virtual framebuffer so that the screen is no longer
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * inside it. We have to spot and handle this.
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsyncBool VBOXSetMode(ScrnInfoPtr pScrn, unsigned cDisplay, unsigned cWidth,
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync unsigned cHeight, int x, int y)
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync TRACE_LOG("cDisplay=%u, cWidth=%u, cHeight=%u, x=%d, y=%d, displayWidth=%d\n",
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync cDisplay, cWidth, cHeight, x, y, pScrn->displayWidth);
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync offStart = y * pVBox->cbLine + x * vboxBPP(pScrn) / 8;
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync /* Deactivate the screen if the mode - specifically the virtual width - is
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * too large for VRAM as we sometimes have to do this - see comments in
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * VBOXPreInit. */
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync if ( offStart + pVBox->cbLine * cHeight > pVBox->cbFBMax
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync || pVBox->cbLine * pScrn->virtualY > pVBox->cbFBMax)
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync /* Deactivate the screen if it is outside of the virtual framebuffer and
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * clamp it to lie inside if it is partly outside. */
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync if (x >= pScrn->displayWidth || x + (int) cWidth <= 0)
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync cwReal = RT_MIN((int) cWidth, pScrn->displayWidth - x);
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync /* Don't fiddle with the hardware if we are switched
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * to a virtual terminal. */
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync VBoxVideoSetModeRegisters(cwReal, cHeight, pScrn->displayWidth,
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync /* Tell the host we support graphics */
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync fFlags |= (pVBox->afDisabled[cDisplay] ? VBVA_SCREEN_F_DISABLED : 0);
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync VBoxHGSMIProcessDisplayInfo(&pVBox->guestCtx, cDisplay, x, y,
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync/** Resize the virtual framebuffer. After resizing we reset all modes
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync * (X.Org 1.3+) to adjust them to the new framebuffer.
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsyncBool VBOXAdjustScreenPixmap(ScrnInfoPtr pScrn, int width, int height)
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync PixmapPtr pPixmap = pScreen->GetScreenPixmap(pScreen);
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync "Failed to get the screen pixmap.\n");
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync if (cbLine > UINT32_MAX || cbLine * height >= pVBox->cbFBMax)
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync "Unable to set up a virtual screen size of %dx%d with %lu of %d Kb of video memory available. Please increase the video memory size.\n",
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync width, height, pVBox->cbFBMax / 1024, pScrn->videoRam);
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync pScreen->ModifyPixmapHeader(pPixmap, width, height,
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync pScrn->displayWidth = vboxDisplayPitch(pScrn, cbLine);
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync /* Write the new values to the hardware */
957e0fcedf2079feefdb1aa2d0da65e39cd8479cvboxsync unsigned i;