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/*************************************************************** -*- c++ -*-
* *
* display.c - Actual implementation of OSD display variants and *
* Display:: namespace that encapsulates a single cDisplay. *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* Changelog: *
* 2005-03 initial version (c) Udo Richter *
* *
***************************************************************************/
#include <strings.h>
#include <vdr/config.h>
#include "setup.h"
#include "display.h"
#include "txtfont.h"
// Static variables of Display:: namespace
Display::Mode Display::mode=Display::Full;
cDisplay *Display::display=NULL;
void Display::SetMode(Display::Mode NewMode) {
// (re-)set display mode.
if (display!=NULL && NewMode==mode) return;
// No change, nothing to do
// OSD origin, centered on VDR OSD
int x0=Setup.OSDLeft+(Setup.OSDWidth-ttSetup.OSDwidth)*ttSetup.OSDHAlign/100;
int y0=Setup.OSDTop +(Setup.OSDHeight-ttSetup.OSDheight)*ttSetup.OSDVAlign/100;
switch (NewMode) {
case Display::Full:
// Need to re-initialize *display:
Delete();
// Try 4BPP display first:
display=new cDisplay4BPP(x0,y0,ttSetup.OSDwidth,ttSetup.OSDheight);
if (!display->Valid()) {
// Failed, possibly out of memory
delete display;
// Try 2BPP display
display=new cDisplay2BPP(x0,y0,ttSetup.OSDwidth,ttSetup.OSDheight);
}
break;
case Display::HalfUpper:
// Shortcut to switch from HalfUpper to HalfLower:
if (mode==Display::HalfLower) {
// keep instance.
((cDisplay4BPPHalf*)display)->SetUpper(true);
break;
}
// Need to re-initialize *display:
Delete();
display=new cDisplay4BPPHalf(x0,y0,ttSetup.OSDwidth,ttSetup.OSDheight,true);
break;
case Display::HalfLower:
// Shortcut to switch from HalfUpper to HalfLower:
if (mode==Display::HalfUpper) {
// keep instance.
((cDisplay4BPPHalf*)display)->SetUpper(false);
break;
}
// Need to re-initialize *display:
Delete();
display=new cDisplay4BPPHalf(x0,y0,ttSetup.OSDwidth,ttSetup.OSDheight,false);
break;
}
mode=NewMode;
// If display is invalid, clean up immediately:
if (!display->Valid()) Delete();
// Pass through OSD black transparency
SetBackgroundColor((tColor)ttSetup.configuredClrBackground);
}
void Display::ShowUpperHalf() {
// Enforce upper half of screen to be visible
if (GetZoom()==cDisplay::Zoom_Lower)
SetZoom(cDisplay::Zoom_Upper);
if (mode==HalfLower)
SetMode(HalfUpper);
}
cDisplay2BPP::cDisplay2BPP(int x0, int y0, int width, int height)
: cDisplay(width,height) {
// 2BPP display with color mapping
osd = cOsdProvider::NewOsd(x0, y0);
if (!osd) return;
width=(width+3)&~3;
// Width has to end on byte boundary, so round up
tArea Areas[] = { { 0, 0, width - 1, height - 1, 2 } };
if (osd->CanHandleAreas(Areas, sizeof(Areas) / sizeof(tArea)) != oeOk) {
DELETENULL(osd);
return;
}
osd->SetAreas(Areas, sizeof(Areas) / sizeof(tArea));
InitPalette();
InitScaler();
CleanDisplay();
}
tColor cDisplay2BPP::GetColorRGB(enumTeletextColor ttc, int Area) {
switch (ttc) {
case ttcBlack: return Background;
case ttcRed: return clrRed;
case ttcGreen: return clrYellow;
case ttcYellow: return clrYellow;
case ttcBlue: return Background;
case ttcMagenta: return clrRed;
case ttcCyan: return clrCyan;
case ttcWhite: return clrCyan;
case ttcTransparent: return Background;
default: return Background;
}
}
tColor cDisplay2BPP::GetColorRGBAlternate(enumTeletextColor ttc, int Area) {
switch (ttc) {
case ttcBlack: return clrCyan;
case ttcRed: return clrYellow;
case ttcGreen: return clrRed;
case ttcYellow: return clrRed;
case ttcBlue: return clrCyan;
case ttcMagenta: return clrYellow;
case ttcCyan: return Background;
case ttcWhite: return Background;
case ttcTransparent: return clrCyan;
default: return Background;
}
}
cDisplay4BPP::cDisplay4BPP(int x0, int y0, int width, int height)
: cDisplay(width,height) {
// 4BPP display for memory-modded DVB cards and other OSD providers
osd = cOsdProvider::NewOsd(x0, y0);
if (!osd) return;
width=(width+1)&~1;
// Width has to end on byte boundary, so round up
tArea Areas[] = { { 0, 0, width - 1, height - 1, 4 } };
if (osd->CanHandleAreas(Areas, sizeof(Areas) / sizeof(tArea)) != oeOk) {
DELETENULL(osd);
return;
}
osd->SetAreas(Areas, sizeof(Areas) / sizeof(tArea));
InitPalette();
InitScaler();
CleanDisplay();
}
cDisplay4BPPHalf::cDisplay4BPPHalf(int x0, int y0, int width, int height, bool upper)
: cDisplay(width,height), Upper(upper), OsdX0(x0), OsdY0(y0)
{
osd=NULL;
// Redirect all real init work to method
InitOSD();
}
void cDisplay4BPPHalf::InitOSD() {
if (osd) delete osd;
osd = cOsdProvider::NewOsd(OsdX0, OsdY0);
if (!osd) return;
int width=(Width+1)&~1;
// Width has to end on byte boundary, so round up
tArea Areas[] = { { 0, 0, width - 1, Height - 1, 4 } };
// Try full-size area first
while (osd->CanHandleAreas(Areas, sizeof(Areas) / sizeof(tArea)) != oeOk) {
// Out of memory, so shrink
if (Upper) {
// Move up lower border
Areas[0].y2=Areas[0].y2-1;
} else {
// Move down upper border
Areas[0].y1=Areas[0].y1+1;
}
if (Areas[0].y1>Areas[0].y2) {
// Area is empty, fail miserably
DELETENULL(osd);
return;
}
}
// Add some backup
// CanHandleAreas is not accurate enough
if (Upper) {
Areas[0].y2=Areas[0].y2-10;
} else {
Areas[0].y1=Areas[0].y1+10;
}
osd->SetAreas(Areas, sizeof(Areas) / sizeof(tArea));
InitPalette();
InitScaler();
CleanDisplay();
// In case we switched on the fly, do a full redraw
Dirty=true;
DirtyAll=true;
Flush();
}
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