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/*
* vidlinux.cxx
*
* Linux video interface
*
* Copyright (c) 1999-2000 Equivalence Pty. Ltd.
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.0 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* The Original Code is Open H323 Library.
*
* The Initial Developer of the Original Code is Equivalence Pty. Ltd.
*
* Contributor(s): ______________________________________.
*
* $Log: vidlinux.cxx,v $
* Revision 1.10 2003/03/19 00:51:15 robertj
* Removed openh323 versions of videoio.h classes as PVideoOutputDevice
* descendants for NULL and PPM files added to PWLib.
*
* Revision 1.9 2002/12/02 07:42:15 robertj
* Fixed GNU warning
*
* Revision 1.8 2000/05/02 04:32:25 robertj
* Fixed copyright notice comment.
*
* Revision 1.7 2000/04/06 17:08:51 craigs
* Fixed problems when compiling with X11 capable systems
*
* Revision 1.6 1999/11/01 11:50:53 craigs
* Updated for changes to video interface
*
* Revision 1.5 1999/11/01 00:52:00 robertj
* Fixed various problems in video, especially ability to pass error return value.
*
* Revision 1.4 1999/09/21 14:58:19 craigs
* Fixed problem with SVGAFull mode
*
* Revision 1.3 1999/09/21 12:27:18 craigs
* Fixed problem with incorrect BYTE ordering on VGAFull mode
*
* Revision 1.2 1999/09/21 11:00:44 craigs
* Added support for full colour SVGA displays
*
* Revision 1.1 1999/09/21 08:55:11 craigs
* Added support for Linux video
*
*
*/
#include <ptlib.h>
#include "vidlinux.h"
#ifdef HAS_VGALIB
#include <vga.h>
static BYTE rgbto256(const BYTE * rgb)
{
return (rgb[0] & 0xe0) | ((rgb[1] >> 3) & 0x1c) | ((rgb[2] >> 6) & 0x03);
}
LinuxSVGAOutputDevice::LinuxSVGAOutputDevice(int _numColours)
: numColours(_numColours)
{
vgaOk = vga_init() == 0;
if (vgaOk) {
if (numColours == 256)
vgaOk = vga_setmode(G320x200x256) == 0;
else if (numColours > 256) {
vgaOk = vga_setmode(G320x200x16M) == 0;
if (!vgaOk)
vgaOk = vga_setmode(G320x200x32K) == 0;
} else
vgaOk = FALSE;
}
if (!vgaOk) {
vga_setmode(TEXT);
PError << "cannot open specified svga device" << endl;
}
}
LinuxSVGAOutputDevice::~LinuxSVGAOutputDevice()
{
if (vgaOk)
vga_setmode(TEXT);
}
BOOL LinuxSVGAOutputDevice::Open(const PString &, BOOL)
{
return TRUE;
}
PStringList LinuxSVGAOutputDevice::GetDeviceNames() const
{
return PStringList();
}
PINDEX LinuxSVGAOutputDevice::GetMaxFrameBytes()
{
return 0;
}
BOOL LinuxSVGAOutputDevice::EndFrame()
{
return TRUE;
}
///////////////////////////////////////////////////////////////
LinuxSVGA256OutputDevice::LinuxSVGA256OutputDevice()
: LinuxSVGAOutputDevice(256)
{
if (vgaOk) {
PINDEX r, g, b, i = 0;
for (r = 0; r < 8; r++)
for (g = 0; g < 8; g++)
for (b = 0; b < 4; b++)
vga_setpalette(i++, (r * 36) >> 2, (g * 36) >> 2, (b * 85) >> 2);
}
}
BOOL LinuxSVGA256OutputDevice::SetFrameData(unsigned x, unsigned y,
unsigned w, unsigned h,
const BYTE * data,
BOOL endFrame)
{
if (vgaOk) {
PBYTEArray rgb256(w);
for (unsigned dy = 0; dy < h; dy++) {
for (unsigned dx = 0; dx < w; dx++)
rgb256[dx] = rgbto256(data + dx*3);
vga_drawscansegment(rgb256.GetPointer(), x, y+dy, w);
}
}
return TRUE;
}
///////////////////////////////////////////////////////////////
LinuxSVGAFullOutputDevice::LinuxSVGAFullOutputDevice()
: LinuxSVGAOutputDevice(256*256*256)
{
}
BOOL LinuxSVGAFullOutputDevice::SetFrameData(unsigned x, unsigned y,
unsigned w, unsigned h,
const BYTE * data,
BOOL endFrame)
{
if (vgaOk) {
for (unsigned dy = 0; dy < h; dy++) {
BYTE bgr[3];
bgr[2] = data[dy*w*3+0];
bgr[1] = data[dy*w*3+1];
bgr[0] = data[dy*w*3+2];
vga_drawscansegment(bgr, x, y+dy, w*3);
}
}
return TRUE;
}
#endif
// End of File ///////////////////////////////////////////////////////////////
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