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vdr/dvbosd.c
2001-07-22 12:33:45 +02:00

468 lines
12 KiB
C

/*
* dvbosd.c: Interface to the DVB On Screen Display
*
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
* $Id: dvbosd.c 1.9 2001/07/22 11:48:54 kls Exp $
*/
#include "dvbosd.h"
#include <signal.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/unistd.h>
#include "tools.h"
// --- cPalette --------------------------------------------------------------
cPalette::cPalette(int Bpp)
{
maxColors = 1 << Bpp;
numColors = 0;
full = false;
}
int cPalette::Index(eDvbColor Color)
{
for (int i = 0; i < numColors; i++) {
if (color[i] == Color) {
used[i] = true;
return i;
}
}
if (!full) {
if (numColors < maxColors) {
color[numColors++] = Color;
used[numColors - 1] = true;
fetched[numColors - 1] = false;
return numColors - 1;
}
for (int i = maxColors; --i >= 0; ) {
if (!used[i]) {
color[i] = Color;
used[i] = true;
fetched[i] = false;
return i;
}
}
esyslog(LOG_ERR, "ERROR: too many different colors used in palette");
full = true;
}
return 0;
}
void cPalette::Reset(void)
{
for (int i = 0; i < numColors; i++)
used[i] = false;
full = false;
}
const eDvbColor *cPalette::Colors(int &FirstColor, int &LastColor)
{
for (FirstColor = 0; FirstColor < numColors; FirstColor++) {
if (!fetched[FirstColor]) {
for (LastColor = FirstColor; LastColor < numColors && !fetched[LastColor]; LastColor++)
fetched[LastColor] = true;
LastColor--; // the loop ended one past the last one!
return &color[FirstColor];
}
}
return NULL;
}
void cPalette::Take(const cPalette &Palette, tIndexes *Indexes)
{
for (int i = 0; i < Palette.numColors; i++) {
if (Palette.used[i]) {
int n = Index(Palette.color[i]);
if (Indexes)
(*Indexes)[i] = n;
}
}
}
// --- cBitmap ---------------------------------------------------------------
cBitmap::cBitmap(int Width, int Height, int Bpp, bool ClearWithBackground)
:cPalette(Bpp)
{
width = Width;
height = Height;
clearWithBackground = ClearWithBackground;
bitmap = NULL;
fontType = fontOsd;
font = NULL;
if (width > 0 && height > 0) {
bitmap = new char[width * height];
if (bitmap) {
Clean();
memset(bitmap, 0x00, width * height);
SetFont(fontOsd);
}
else
esyslog(LOG_ERR, "ERROR: can't allocate bitmap!");
}
else
esyslog(LOG_ERR, "ERROR: illegal bitmap parameters (%d, %d)!", width, height);
}
cBitmap::~cBitmap()
{
delete font;
delete bitmap;
}
eDvbFont cBitmap::SetFont(eDvbFont Font)
{
eDvbFont oldFont = fontType;
if (fontType != Font || !font) {
delete font;
font = new cFont(Font);
fontType = Font;
}
return oldFont;
}
bool cBitmap::Dirty(int &x1, int &y1, int &x2, int &y2)
{
if (dirtyX2 >= 0) {
//XXX Workaround: apparently the bitmap sent to the driver always has to be a multiple
//XXX of 8 bits wide, and (dx * dy) also has to be a multiple of 8.
//TODO Fix driver (should be able to handle any size bitmaps!)
while ((dirtyX1 > 0 || dirtyX2 < width - 1) && ((dirtyX2 - dirtyX1) & 7) != 7) {
if (dirtyX2 < width - 1)
dirtyX2++;
else if (dirtyX1 > 0)
dirtyX1--;
}
//XXX "... / 2" <==> Bpp???
while ((dirtyY1 > 0 || dirtyY2 < height - 1) && (((dirtyX2 - dirtyX1 + 1) * (dirtyY2 - dirtyY1 + 1) / 2) & 7) != 0) {
if (dirtyY2 < height - 1)
dirtyY2++;
else if (dirtyY1 > 0)
dirtyY1--;
}
while ((dirtyX1 > 0 || dirtyX2 < width - 1) && (((dirtyX2 - dirtyX1 + 1) * (dirtyY2 - dirtyY1 + 1) / 2) & 7) != 0) {
if (dirtyX2 < width - 1)
dirtyX2++;
else if (dirtyX1 > 0)
dirtyX1--;
}
x1 = dirtyX1;
y1 = dirtyY1;
x2 = dirtyX2;
y2 = dirtyY2;
return true;
}
return false;
}
void cBitmap::Clean(void)
{
dirtyX1 = width;
dirtyY1 = height;
dirtyX2 = -1;
dirtyY2 = -1;
}
void cBitmap::SetIndex(int x, int y, char Index)
{
if (bitmap) {
if (0 <= x && x < width && 0 <= y && y < height) {
if (bitmap[width * y + x] != Index) {
bitmap[width * y + x] = Index;
if (dirtyX1 > x) dirtyX1 = x;
if (dirtyY1 > y) dirtyY1 = y;
if (dirtyX2 < x) dirtyX2 = x;
if (dirtyY2 < y) dirtyY2 = y;
}
}
}
}
void cBitmap::SetPixel(int x, int y, eDvbColor Color)
{
SetIndex(x, y, Index(Color));
}
void cBitmap::SetBitmap(int x, int y, const cBitmap &Bitmap)
{
if (bitmap && Bitmap.bitmap) {
tIndexes Indexes;
Take(Bitmap, &Indexes);
for (int ix = 0; ix < Bitmap.width; ix++) {
for (int iy = 0; iy < Bitmap.height; iy++)
SetIndex(x + ix, y + iy, Indexes[Bitmap.bitmap[Bitmap.width * iy + ix]]);
}
}
}
int cBitmap::Width(unsigned char c)
{
return font ? font->Width(c) : -1;
}
int cBitmap::Width(const char *s)
{
return font ? font->Width(s) : -1;
}
void cBitmap::Text(int x, int y, const char *s, eDvbColor ColorFg, eDvbColor ColorBg)
{
if (bitmap) {
char fg = Index(ColorFg);
char bg = Index(ColorBg);
int h = font->Height(s);
while (s && *s) {
const cFont::tCharData *CharData = font->CharData(*s++);
if (int(x + CharData->width) > width)
break;
for (int row = 0; row < h; row++) {
cFont::tPixelData PixelData = CharData->lines[row];
for (int col = CharData->width; col-- > 0; ) {
SetIndex(x + col, y + row, (PixelData & 1) ? fg : bg);
PixelData >>= 1;
}
}
x += CharData->width;
}
}
}
void cBitmap::Fill(int x1, int y1, int x2, int y2, eDvbColor Color)
{
if (bitmap) {
char c = Index(Color);
for (int y = y1; y <= y2; y++)
for (int x = x1; x <= x2; x++)
SetIndex(x, y, c);
}
}
void cBitmap::Clear(void)
{
Reset();
if (clearWithBackground)
Fill(0, 0, width - 1, height - 1, clrBackground);
}
const char *cBitmap::Data(int x, int y)
{
return &bitmap[y * width + x];
}
// --- cWindow ---------------------------------------------------------------
class cWindow : public cBitmap {
private:
int x0, y0;
bool shown;
public:
cWindow(int x, int y, int w, int h, int Bpp, bool ClearWithBackground = true);
int X0(void) { return x0; }
int Y0(void) { return y0; }
bool Shown(void) { bool s = shown; shown = true; return s; }
bool Contains(int x, int y);
void Fill(int x1, int y1, int x2, int y2, eDvbColor Color);
void SetBitmap(int x, int y, const cBitmap &Bitmap);
void Text(int x, int y, const char *s, eDvbColor ColorFg = clrWhite, eDvbColor ColorBg = clrBackground);
const char *Data(int x, int y);
};
cWindow::cWindow(int x, int y, int w, int h, int Bpp, bool ClearWithBackground)
:cBitmap(w, h, Bpp, ClearWithBackground)
{
x0 = x;
y0 = y;
shown = false;
}
bool cWindow::Contains(int x, int y)
{
x -= x0;
y -= y0;
return x >= 0 && y >= 0 && x < width && y < height;
}
void cWindow::Fill(int x1, int y1, int x2, int y2, eDvbColor Color)
{
cBitmap::Fill(x1 - x0, y1 - y0, x2 - x0, y2 - y0, Color);
}
void cWindow::SetBitmap(int x, int y, const cBitmap &Bitmap)
{
cBitmap::SetBitmap(x - x0, y - y0, Bitmap);
}
void cWindow::Text(int x, int y, const char *s, eDvbColor ColorFg, eDvbColor ColorBg)
{
cBitmap::Text(x - x0, y - y0, s, ColorFg, ColorBg);
}
const char *cWindow::Data(int x, int y)
{
return cBitmap::Data(x, y);
}
// --- cDvbOsd ---------------------------------------------------------------
cDvbOsd::cDvbOsd(int VideoDev, int x, int y, int w, int h, int Bpp)
{
videoDev = VideoDev;
numWindows = 0;
x0 = x;
y0 = y;
if (videoDev >= 0) {
if (w > 0 && h > 0)
Create(0, 0, w, h, Bpp);
}
else
esyslog(LOG_ERR, "ERROR: illegal video device handle (%d)!", videoDev);
}
cDvbOsd::~cDvbOsd()
{
if (videoDev >= 0) {
while (numWindows > 0) {
Cmd(OSD_SetWindow, 0, numWindows--);
Cmd(OSD_Close);
delete window[numWindows];
}
}
}
void cDvbOsd::Cmd(OSD_Command cmd, int color, int x0, int y0, int x1, int y1, const void *data)
{
if (videoDev >= 0) {
osd_cmd_t dc;
dc.cmd = cmd;
dc.color = color;
dc.x0 = x0;
dc.y0 = y0;
dc.x1 = x1;
dc.y1 = y1;
dc.data = (void *)data;
// must block all signals, otherwise the command might not be fully executed
sigset_t set, oldset;
sigfillset(&set);
sigprocmask(SIG_BLOCK, &set, &oldset);
ioctl(videoDev, OSD_SEND_CMD, &dc);
usleep(10); // XXX Workaround for a driver bug (cInterface::DisplayChannel() displayed texts at wrong places
// XXX and sometimes the OSD was no longer displayed).
// XXX Increase the value if the problem still persists on your particular system.
// TODO Check if this is still necessary with driver versions after 0.7.
sigprocmask(SIG_SETMASK, &oldset, NULL);
}
}
bool cDvbOsd::Create(int x, int y, int w, int h, int Bpp, bool ClearWithBackground, eDvbColor Color0, eDvbColor Color1, eDvbColor Color2, eDvbColor Color3)
{
/* TODO XXX
- check that no two windows overlap
*/
if (numWindows < MAXNUMWINDOWS) {
if (x >= 0 && y >= 0 && w > 0 && h > 0 && (Bpp == 1 || Bpp == 2 || Bpp == 4 || Bpp == 8)) {
if ((w & 0x03) != 0) {
w += 4 - (w & 0x03);
esyslog(LOG_ERR, "ERROR: OSD window width must be a multiple of 4 - increasing to %d", w);
}
cWindow *win = new cWindow(x, y, w, h, Bpp, ClearWithBackground);
if (Color0 != clrTransparent) {
win->Index(Color0);
win->Index(Color1);
win->Index(Color2);
win->Index(Color3);
win->Reset();
}
window[numWindows++] = win;
Cmd(OSD_SetWindow, 0, numWindows);
Cmd(OSD_Open, Bpp, x0 + x, y0 + y, x0 + x + w - 1, y0 + y + h - 1, (void *)1); // initially hidden!
}
else
esyslog(LOG_ERR, "ERROR: illegal OSD parameters");
}
else
esyslog(LOG_ERR, "ERROR: too many OSD windows");
return false;
}
cWindow *cDvbOsd::GetWindow(int x, int y)
{
for (int i = 0; i < numWindows; i++) {
if (window[i]->Contains(x, y))
return window[i];
}
return NULL;
}
void cDvbOsd::Flush(void)
{
for (int i = 0; i < numWindows; i++) {
int x1 = 0, y1 = 0, x2 = 0, y2 = 0;
if (window[i]->Dirty(x1, y1, x2, y2)) {
Cmd(OSD_SetWindow, 0, i + 1);
int FirstColor = 0, LastColor = 0;
const eDvbColor *pal;
while ((pal = window[i]->Colors(FirstColor, LastColor)) != NULL)
Cmd(OSD_SetPalette, FirstColor, LastColor, 0, 0, 0, pal);
Cmd(OSD_SetBlock, window[i]->Width(), x1, y1, x2, y2, window[i]->Data(x1, y1));
window[i]->Clean();
}
}
// Showing the windows in a separate loop to avoid seeing them come up one after another
for (int i = 0; i < numWindows; i++) {
if (!window[i]->Shown()) {
Cmd(OSD_SetWindow, 0, i + 1);
Cmd(OSD_MoveWindow, 0, x0 + window[i]->X0(), y0 + window[i]->Y0());
}
}
}
void cDvbOsd::Clear(void)
{
for (int i = 0; i < numWindows; i++)
window[i]->Clear();
}
void cDvbOsd::Fill(int x1, int y1, int x2, int y2, eDvbColor Color)
{
cWindow *w = GetWindow(x1, y1);
if (w)
w->Fill(x1, y1, x2, y2, Color);
}
void cDvbOsd::SetBitmap(int x, int y, const cBitmap &Bitmap)
{
cWindow *w = GetWindow(x, y);
if (w)
w->SetBitmap(x, y, Bitmap);
}
int cDvbOsd::Width(unsigned char c)
{
return numWindows ? window[0]->Width(c) : 0;
}
int cDvbOsd::Width(const char *s)
{
return numWindows ? window[0]->Width(s) : 0;
}
eDvbFont cDvbOsd::SetFont(eDvbFont Font)
{
eDvbFont oldFont = Font;
for (int i = 0; i < numWindows; i++)
oldFont = window[i]->SetFont(Font);
return oldFont;
}
void cDvbOsd::Text(int x, int y, const char *s, eDvbColor ColorFg = clrWhite, eDvbColor ColorBg = clrBackground)
{
cWindow *w = GetWindow(x, y);
if (w)
w->Text(x, y, s, ColorFg, ColorBg);
}