/*
* $Id$
*
* Copyright (C) 2003-2014 JNode.org
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; If not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package org.jnode.driver.video.ati.radeon;
import org.jnode.driver.video.vgahw.DisplayMode;
import org.jnode.system.resource.MemoryResource;
/**
* @author Ewout Prangsma (epr@users.sourceforge.net)
*/
final class FPITimingBlock {
private final int dot_clock; // 9
private final int h_display; // 19
private final int h_sync_start; // 21
private final int h_sync_width; // 23 (8-bit)
private final int h_total; // 17
private final int v_display; // 26
private final int v_sync; // 28
private final int v_total; // 24
private final int xres;
private final int yres;
/**
* Initialize this instance.
*
* @param biosRom
*/
FPITimingBlock(MemoryResource biosRom, int offset) {
this.xres = biosRom.getChar(offset + 0);
this.yres = biosRom.getChar(offset + 2);
this.dot_clock = biosRom.getChar(offset + 9) * 10;
this.h_total = biosRom.getShort(offset + 17) & 0xFFFF;
this.h_display = biosRom.getShort(offset + 19) & 0xFFFF;
this.h_sync_start = biosRom.getChar(offset + 21);
this.h_sync_width = biosRom.getByte(offset + 23) & 0xFF;
this.v_total = biosRom.getChar(offset + 24);
this.v_display = biosRom.getChar(offset + 26);
this.v_sync = biosRom.getChar(offset + 28);
}
/**
* @return Returns the dot_clock.
*/
final int getDotClock() {
return dot_clock;
}
/**
* @return Returns the h_display.
*/
final int getHDisplay() {
return h_display;
}
/**
* @return Returns the h_sync_start.
*/
final int getHSyncStart() {
return h_sync_start;
}
/**
* @return Returns the h_sync_width.
*/
final int getHSyncWidth() {
return h_sync_width;
}
/**
* @return Returns the h_total.
*/
final int getHTotal() {
return h_total;
}
/**
* @return Returns the v_display.
*/
final int getVDisplay() {
return v_display;
}
/**
* @return Returns the v_sync.
*/
final int getVSync() {
return v_sync;
}
/**
* @return Returns the v_total.
*/
final int getVTotal() {
return v_total;
}
/**
* @return Returns the xres.
*/
final int getXres() {
return xres;
}
/**
* @return Returns the yres.
*/
final int getYres() {
return yres;
}
/**
* Convert this timing into a display mode.
*
* @return
*/
final DisplayMode toDisplayMode(DisplayMode src, int panel_xres, int panel_yres) {
final int hblank = (h_total - h_display) * 8;
final int hOver_plus = ((h_sync_start - h_display - 1) * 8) & 0x7FFF;
final int vblank = v_total - v_display;
final int vOver_plus = (v_sync & 0x7ff) - v_display;
final int vSync_width = (v_sync & 0xf800) >> 11;
final int xres = Math.min(panel_xres, src.getWidth());
final int yres = Math.min(panel_yres, src.getHeight());
final int hTotal = xres + hblank;
final int hSyncStart = xres + hOver_plus;
final int hSyncEnd = hSyncStart + h_sync_width;
final int vTotal = yres + vblank;
final int vSyncStart = yres + vOver_plus;
final int vSyncEnd = vSyncStart + vSync_width;
return new DisplayMode(src.getFreq(), xres, hSyncStart, hSyncEnd, hTotal, yres, vSyncStart,
vSyncEnd, vTotal);
}
public String toString() {
return "XRes:" + getXres() + ", YRes:" + getYres() + ",DotClock:" + getDotClock() +
", HTotal:" + getHTotal() + ", HDisplay:" + getHDisplay() + ", HSyncStart:" +
getHSyncStart() + ", HSyncWith:" + getHSyncWidth() + ", VTotal:" + getVTotal() +
", VDisplay:" + getVDisplay() + ", VSync:" + getVSync();
}
}