void OpenGLGraphicsManager::displayMessageOnOSD(const char *msg) {
#ifdef USE_OSD
// HACK: Actually no client code should use graphics functions from
// another thread. But the MT-32 emulator still does, thus we need to
// make sure this doesn't happen while a updateScreen call is done.
Common::StackLock lock(_osdMutex);
// Slip up the lines.
Common::Array<Common::String> osdLines;
Common::StringTokenizer tokenizer(msg, "\n");
while (!tokenizer.empty()) {
osdLines.push_back(tokenizer.nextToken());
}
// Do the actual drawing like the SDL backend.
const Graphics::Font *font = getFontOSD();
Graphics::Surface *dst = _osd->getSurface();
_osd->fill(0);
_osd->flagDirty();
// Determine a rect which would contain the message string (clipped to the
// screen dimensions).
const int vOffset = 6;
const int lineSpacing = 1;
const int lineHeight = font->getFontHeight() + 2 * lineSpacing;
int width = 0;
int height = lineHeight * osdLines.size() + 2 * vOffset;
for (uint i = 0; i < osdLines.size(); i++) {
width = MAX(width, font->getStringWidth(osdLines[i]) + 14);
}
// Clip the rect
width = MIN<int>(width, dst->w);
height = MIN<int>(height, dst->h);
int dstX = (dst->w - width) / 2;
int dstY = (dst->h - height) / 2;
// Draw a dark gray rect.
const uint32 color = dst->format.RGBToColor(40, 40, 40);
dst->fillRect(Common::Rect(dstX, dstY, dstX + width, dstY + height), color);
// Render the message, centered, and in white
const uint32 white = dst->format.RGBToColor(255, 255, 255);
for (uint i = 0; i < osdLines.size(); ++i) {
font->drawString(dst, osdLines[i],
dstX, dstY + i * lineHeight + vOffset + lineSpacing, width,
white, Graphics::kTextAlignCenter);
}
// Init the OSD display parameters.
_osdAlpha = kOSDInitialAlpha;
_osdFadeStartTime = g_system->getMillis() + kOSDFadeOutDelay;
#endif
}
void OpenGLGraphicsManager::osdMessageUpdateSurface() {
// Split up the lines.
Common::Array<Common::String> osdLines;
Common::StringTokenizer tokenizer(_osdMessageNextData, "\n");
while (!tokenizer.empty()) {
osdLines.push_back(tokenizer.nextToken());
}
// Do the actual drawing like the SDL backend.
const Graphics::Font *font = getFontOSD();
// Determine a rect which would contain the message string (clipped to the
// screen dimensions).
const int vOffset = 6;
const int lineSpacing = 1;
const int lineHeight = font->getFontHeight() + 2 * lineSpacing;
uint width = 0;
uint height = lineHeight * osdLines.size() + 2 * vOffset;
for (uint i = 0; i < osdLines.size(); i++) {
width = MAX<uint>(width, font->getStringWidth(osdLines[i]) + 14);
}
// Clip the rect
width = MIN<uint>(width, _displayWidth);
height = MIN<uint>(height, _displayHeight);
delete _osdMessageSurface;
_osdMessageSurface = nullptr;
_osdMessageSurface = createSurface(_defaultFormatAlpha);
assert(_osdMessageSurface);
// We always filter the osd with GL_LINEAR. This assures it's
// readable in case it needs to be scaled and does not affect it
// otherwise.
_osdMessageSurface->enableLinearFiltering(true);
_osdMessageSurface->allocate(width, height);
Graphics::Surface *dst = _osdMessageSurface->getSurface();
// Draw a dark gray rect.
const uint32 color = dst->format.RGBToColor(40, 40, 40);
dst->fillRect(Common::Rect(0, 0, width, height), color);
// Render the message in white
const uint32 white = dst->format.RGBToColor(255, 255, 255);
for (uint i = 0; i < osdLines.size(); ++i) {
font->drawString(dst, osdLines[i],
0, i * lineHeight + vOffset + lineSpacing, width,
white, Graphics::kTextAlignCenter);
}
_osdMessageSurface->updateGLTexture();
// Init the OSD display parameters.
_osdMessageAlpha = kOSDMessageInitialAlpha;
_osdMessageFadeStartTime = g_system->getMillis() + kOSDMessageFadeOutDelay;
// Clear the text update request
_osdMessageNextData.clear();
_osdMessageChangeRequest = false;
}
