// TODO code: optimise airspace drawing (same as DrawAirSpace())
// draw airspace using alpha blending
//static
void MapWindow::DrawTptAirSpace(HDC hdc, const RECT rc) {
// since standard GDI functions (brushes, pens...) ignore alpha octet in ARGB
// color value and don't set it in the resulting bitmap, we cannot use
// perpixel alpha blending, instead we use global opacity for alpha blend
// (same opacity for all pixels); for fully "transparent" areas (without
// airspace) we must copy destination bitmap into source bitmap first so that
// alpha blending of such areas results in the same pixels as origin pixels
// in destination
CAirspaceList::const_iterator it;
CAirspaceList::const_reverse_iterator itr;
const CAirspaceList& airspaces_to_draw = CAirspaceManager::Instance().GetNearAirspacesRef();
int airspace_type;
bool found = false;
bool borders_only = (GetAirSpaceFillType() == asp_fill_ablend_borders);
HDC hdcbuffer = NULL;
HBITMAP hbbufferold = NULL, hbbuffer = NULL;
static bool asp_selected_flash = false;
asp_selected_flash = !asp_selected_flash;
if (borders_only) {
// Prepare layers
hdcbuffer = CreateCompatibleDC(hdc);
hbbuffer = CreateCompatibleBitmap(hdc, rc.right - rc.left, rc.bottom - rc.top);
hbbufferold = (HBITMAP)SelectObject(hdcbuffer, hbbuffer);
BitBlt(hdcbuffer, rc.left, rc.top, rc.right-rc.left, rc.bottom-rc.top, NULL, rc.left, rc.top, BLACKNESS );
SelectObject(hdcbuffer, GetStockObject(NULL_PEN));
BitBlt(hDCMask, rc.left, rc.top, rc.right-rc.left, rc.bottom-rc.top, NULL, rc.left, rc.top, BLACKNESS );
SelectObject(hDCMask, hAirspaceBorderPen);
SelectObject(hDCMask, GetStockObject(HOLLOW_BRUSH));
}
// Draw airspace area
if (1) {
CCriticalSection::CGuard guard(CAirspaceManager::Instance().MutexRef());
if (borders_only) {
// Draw in reverse order!
// The idea behind this, is lower top level airspaces are smaller. (statistically)
// They have to be draw later, because inside border area have to be in correct color,
// not the color of the bigger airspace above this small one.
for (itr=airspaces_to_draw.rbegin(); itr != airspaces_to_draw.rend(); ++itr) {
if ((*itr)->DrawStyle() == adsFilled) {
airspace_type = (*itr)->Type();
if (!found) {
found = true;
ClearTptAirSpace(hdc, rc);
}
// set filling brush
SelectObject(hdcbuffer, GetAirSpaceSldBrushByClass(airspace_type));
(*itr)->Draw(hdcbuffer, rc, true);
(*itr)->Draw(hDCMask, rc, false);
}
}//for
} else {
// Draw in direct order!
for (it=airspaces_to_draw.begin(); it != airspaces_to_draw.end(); ++it) {
if ((*it)->DrawStyle() == adsFilled) {
airspace_type = (*it)->Type();
if (!found) {
found = true;
ClearTptAirSpace(hdc, rc);
}
// set filling brush
SelectObject(hDCTemp, GetAirSpaceSldBrushByClass(airspace_type));
(*it)->Draw(hDCTemp, rc, true);
}
}//for
}//else borders_only
}//mutex release
// alpha blending
if (found) {
if (borders_only) {
#if (WINDOWSPC<1)
TransparentImage(hdcbuffer,
rc.left,rc.top,
rc.right-rc.left,rc.bottom-rc.top,
hDCMask,
rc.left,rc.top,
rc.right-rc.left,rc.bottom-rc.top,
RGB_WHITE
);
TransparentImage(hDCTemp,
rc.left,rc.top,
rc.right-rc.left,rc.bottom-rc.top,
hdcbuffer,
rc.left,rc.top,
rc.right-rc.left,rc.bottom-rc.top,
RGB_BLACK
);
#else
TransparentBlt(hdcbuffer,
rc.left,rc.top,
rc.right-rc.left,rc.bottom-rc.top,
hDCMask,
rc.left,rc.top,
rc.right-rc.left,rc.bottom-rc.top,
RGB_WHITE
);
TransparentBlt(hDCTemp,
rc.left,rc.top,
rc.right-rc.left,rc.bottom-rc.top,
hdcbuffer,
rc.left,rc.top,
rc.right-rc.left,rc.bottom-rc.top,
RGB_BLACK
);
#endif
}
DoAlphaBlend(hdc, rc, hDCTemp, rc, (255 * GetAirSpaceOpacity()) / 100);
}
// draw it again, just the outlines
// we will be drawing directly into given hdc, so store original PEN object
HPEN hOrigPen = (HPEN) SelectObject(hdc, GetStockObject(WHITE_PEN));
if (1) {
CCriticalSection::CGuard guard(CAirspaceManager::Instance().MutexRef());
for (it=airspaces_to_draw.begin(); it != airspaces_to_draw.end(); ++it) {
if ((*it)->DrawStyle()) {
airspace_type = (*it)->Type();
if (bAirspaceBlackOutline ^ (asp_selected_flash && (*it)->Selected()) ) {
SelectObject(hdc, GetStockObject(BLACK_PEN));
} else {
SelectObject(hdc, hAirspacePens[airspace_type]);
}
(*it)->Draw(hdc, rc, false);
}
}//for
}
if (borders_only) {
// Free up GDI resources
SelectObject(hdcbuffer, hbbufferold);
DeleteObject(hbbuffer);
DeleteDC(hdcbuffer);
}
// restore original PEN
SelectObject(hdc, hOrigPen);
} // DrawTptAirSpace()
// TODO code: optimise airspace drawing (same as DrawAirSpace())
// draw airspace using alpha blending
//static
void MapWindow::DrawTptAirSpace(HDC hdc, const RECT rc) {
// since standard GDI functions (brushes, pens...) ignore alpha octet in ARGB
// color value and don't set it in the resulting bitmap, we cannot use
// perpixel alpha blending, instead we use global opacity for alpha blend
// (same opacity for all pixels); for fully "transparent" areas (without
// airspace) we must copy destination bitmap into source bitmap first so that
// alpha blending of such areas results in the same pixels as origin pixels
// in destination
CAirspaceList::const_iterator it;
CAirspaceList::const_reverse_iterator itr;
const CAirspaceList& airspaces_to_draw = CAirspaceManager::Instance().GetNearAirspacesRef();
int airspace_type;
bool found = false;
bool borders_only = (GetAirSpaceFillType() == asp_fill_ablend_borders);
bool outlined_only=(GetAirSpaceFillType()==asp_fill_border_only);
static bool asp_selected_flash = false;
asp_selected_flash = !asp_selected_flash;
int nDC1 = SaveDC(mhdcbuffer);
int nDC2 = SaveDC(hDCMask);
int nDC3 = SaveDC(hDCTemp);
// Draw airspace area
if (1) {
CCriticalSection::CGuard guard(CAirspaceManager::Instance().MutexRef());
if (borders_only) {
// Draw in reverse order!
// The idea behind this, is lower top level airspaces are smaller. (statistically)
// They have to be draw later, because inside border area have to be in correct color,
// not the color of the bigger airspace above this small one.
for (itr=airspaces_to_draw.rbegin(); itr != airspaces_to_draw.rend(); ++itr) {
if ((*itr)->DrawStyle() == adsFilled) {
airspace_type = (*itr)->Type();
if (!found) {
found = true;
ClearTptAirSpace(hdc, rc);
}
// set filling brush
SelectObject(mhdcbuffer, GetAirSpaceSldBrushByClass(airspace_type));
(*itr)->Draw(mhdcbuffer, rc, true);
(*itr)->Draw(hDCMask, rc, false);
}
}//for
} else {
// Draw in direct order!
for (it=airspaces_to_draw.begin(); it != airspaces_to_draw.end(); ++it) {
if ((*it)->DrawStyle() == adsFilled) {
airspace_type = (*it)->Type();
if (!found) {
found = true;
ClearTptAirSpace(hdc, rc);
}
// set filling brush
SelectObject(hDCTemp, GetAirSpaceSldBrushByClass(airspace_type));
(*it)->Draw(hDCTemp, rc, true);
}
}//for
}//else borders_only
}//mutex release
// alpha blending
if (found) {
if (borders_only) {
MaskBlt(hDCTemp,
rc.left,rc.top,
rc.right-rc.left,rc.bottom-rc.top,
mhdcbuffer,rc.left,rc.top,
hMaskBitMap,rc.left,rc.top, MAKEROP4(SRCAND, 0x00AA0029));
}
DoAlphaBlend(hdc, rc, hDCTemp, rc, (255 * GetAirSpaceOpacity()) / 100);
}
// draw it again, just the outlines
// we will be drawing directly into given hdc, so store original PEN object
HPEN hOrigPen = (HPEN) SelectObject(hdc, GetStockObject(WHITE_PEN));
if (1) {
CCriticalSection::CGuard guard(CAirspaceManager::Instance().MutexRef());
for (it=airspaces_to_draw.begin(); it != airspaces_to_draw.end(); ++it) {
if ((*it)->DrawStyle()) {
airspace_type = (*it)->Type();
if ( (((*it)->DrawStyle()==adsFilled)&&!outlined_only&&!borders_only) ^ (asp_selected_flash && (*it)->Selected()) ) {
SelectObject(hdc, GetStockObject(BLACK_PEN));
} else {
SelectObject(hdc, hAirspacePens[airspace_type]);
}
(*it)->Draw(hdc, rc, false);
}
}//for
}
// restore original PEN
SelectObject(hdc, hOrigPen);
RestoreDC(mhdcbuffer, nDC1);
RestoreDC(hDCMask, nDC2);
RestoreDC(hDCTemp, nDC3);
} // DrawTptAirSpace()