void RenderCache::RequestRendering(DisplayModel* dm, int pageNo) {
TilePosition tile(GetTileRes(dm, pageNo), 0, 0);
// only honor the request if there's a good chance that the
// rendered tile will actually be used
if (tile.res > 1)
return;
RequestRendering(dm, pageNo, tile);
// render both tiles of the first row when splitting a page in four
// (which always happens on larger displays for Fit Width)
if (tile.res == 1 && !IsRenderQueueFull()) {
tile.col = 1;
RequestRendering(dm, pageNo, tile, false);
}
}
// TODO: conceptually, RenderCache is not the right place for code that paints
// (this is the only place that knows about Tiles, though)
UINT RenderCache::PaintTile(HDC hdc, RectI bounds, DisplayModel *dm, int pageNo,
TilePosition tile, RectI tileOnScreen, bool renderMissing,
bool *renderOutOfDateCue, bool *renderedReplacement)
{
BitmapCacheEntry *entry = Find(dm, pageNo, dm->Rotation(), dm->ZoomReal(), &tile);
UINT renderDelay = 0;
if (!entry) {
if (!isRemoteSession) {
if (renderedReplacement)
*renderedReplacement = true;
entry = Find(dm, pageNo, dm->Rotation(), INVALID_ZOOM, &tile);
}
renderDelay = GetRenderDelay(dm, pageNo, tile);
if (renderMissing && RENDER_DELAY_UNDEFINED == renderDelay && !IsRenderQueueFull())
RequestRendering(dm, pageNo, tile);
}
RenderedBitmap *renderedBmp = entry ? entry->bitmap : NULL;
HBITMAP hbmp = renderedBmp ? renderedBmp->GetBitmap() : NULL;
if (!hbmp) {
if (entry && !(renderedBmp && ReduceTileSize()))
renderDelay = RENDER_DELAY_FAILED;
else if (0 == renderDelay)
renderDelay = 1;
if (entry)
DropCacheEntry(entry);
return renderDelay;
}
HDC bmpDC = CreateCompatibleDC(hdc);
if (bmpDC) {
SizeI bmpSize = renderedBmp->Size();
int xSrc = -min(tileOnScreen.x, 0);
int ySrc = -min(tileOnScreen.y, 0);
float factor = min(1.0f * bmpSize.dx / tileOnScreen.dx, 1.0f * bmpSize.dy / tileOnScreen.dy);
SelectObject(bmpDC, hbmp);
if (factor != 1.0f)
StretchBlt(hdc, bounds.x, bounds.y, bounds.dx, bounds.dy,
bmpDC, (int)(xSrc * factor), (int)(ySrc * factor),
(int)(bounds.dx * factor), (int)(bounds.dy * factor), SRCCOPY);
else
BitBlt(hdc, bounds.x, bounds.y, bounds.dx, bounds.dy,
bmpDC, xSrc, ySrc, SRCCOPY);
DeleteDC(bmpDC);
#ifdef SHOW_TILE_LAYOUT
HPEN pen = CreatePen(PS_SOLID, 1, RGB(0xff, 0xff, 0x00));
HGDIOBJ oldPen = SelectObject(hdc, pen);
PaintRect(hdc, bounds);
DeletePen(SelectObject(hdc, oldPen));
#endif
}
if (entry->outOfDate) {
if (renderOutOfDateCue)
*renderOutOfDateCue = true;
CrashIf(renderedReplacement && !*renderedReplacement);
}
DropCacheEntry(entry);
return 0;
}
