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/*
* 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 1.5 2000/11/05 12:53:09 kls Exp $
*/
#include "dvbosd.h"
#include <signal.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/unistd.h>
#include "tools.h"
// --- cBitmap ---------------------------------------------------------------
cBitmap::cBitmap(int Width, int Height)
{
width = Width;
height = Height;
bitmap = NULL;
font = NULL;
if (width > 0 && height > 0) {
bitmap = new char[width * height];
if (bitmap) {
Clean();
memset(bitmap, clrTransparent, 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;
}
void cBitmap::SetFont(eDvbFont Font)
{
delete font;
font = new cFont(Font);
}
bool cBitmap::Dirty(void)
{
return dirtyX2 >= 0;
}
void cBitmap::Clean(void)
{
dirtyX1 = width;
dirtyY1 = height;
dirtyX2 = -1;
dirtyY2 = -1;
}
void cBitmap::SetPixel(int x, int y, eDvbColor Color)
{
if (bitmap) {
if (0 <= x && x < width && 0 <= y && y < height) {
if (bitmap[width * y + x] != Color) {
bitmap[width * y + x] = Color;
if (dirtyX1 > x) dirtyX1 = x;
if (dirtyY1 > y) dirtyY1 = y;
if (dirtyX2 < x) dirtyX2 = x;
if (dirtyY2 < y) dirtyY2 = y;
}
}
}
}
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) {
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; ) {
SetPixel(x + col, y + row, (PixelData & 1) ? ColorFg : ColorBg);
PixelData >>= 1;
}
}
x += CharData->width;
}
}
}
void cBitmap::Fill(int x1, int y1, int x2, int y2, eDvbColor Color)
{
if (bitmap) {
for (int y = y1; y <= y2; y++)
for (int x = x1; x <= x2; x++)
SetPixel(x, y, Color);
}
}
void cBitmap::Clear(void)
{
Fill(0, 0, width - 1, height - 1, clrBackground);
}
// --- cDvbOsd ---------------------------------------------------------------
cDvbOsd::cDvbOsd(int VideoDev, int x1, int y1, int x2, int y2, int Bpp)
:cBitmap(x2 - x1 + 1, y2 - y1 + 1)
{
videoDev = VideoDev;
if (videoDev >= 0)
Cmd(OSD_Open, Bpp, x1, y1, x2, y2);
else
esyslog(LOG_ERR, "ERROR: illegal video device handle (%d)!", videoDev);
}
cDvbOsd::~cDvbOsd()
{
if (videoDev >= 0)
Cmd(OSD_Close);
}
void cDvbOsd::Cmd(OSD_Command cmd, int color, int x0, int y0, int x1, int y1, const void *data)
{
if (videoDev >= 0) {
struct drawcmd 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, VIDIOCSOSDCOMMAND, &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);
}
}
void cDvbOsd::Flush(void)
{
if (Dirty()) {
//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--;
}
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--;
}
Cmd(OSD_SetBlock, width, dirtyX1, dirtyY1, dirtyX2, dirtyY2, &bitmap[dirtyY1 * width + dirtyX1]);
Clean();
}
}
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