StackOverflow2013

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plurals

PO
primarykey
Id
7413623
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2011-09-14T08:49:40.633
FavoriteCount
0
LastActivityDate
2011-09-14T09:22:54.520
LastEditDate
2011-09-14T09:22:54.520
LastEditorUserId
843374
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843374
ParentId
5221936
PostTypeId
2
Score
2
ViewCount
0
LastEditorDisplayName
text
Body
Here is a method of getting GDI+ bitmaps into a layered window. This allows multiple bitmap overlays, positioning and re-sizing. <pre><code>void SetSplashImage() { // Default to upper left of screen POINT ptOrigin = { 0, 0 }; SIZE sizeSplash = { 128, 128 }; // Get the actual screen location GetPointOfOrigin(ptOrigin, sizeSplash); // Our in memory database of GDI+ Bitmaps data::image::BoxOfBits *box = dynamic_cast<data::image::BoxOfBits *>(&Images.get_package("skin_layout_008")); // Create a display context as a canvas to draw the images HDC hdcScreen = GetDC(NULL); HDC hdcMem = CreateCompatibleDC(hdcScreen); HBITMAP bmMem = CreateCompatibleBitmap(hdcScreen, sizeSplash.cx, sizeSplash.cy); // Prep canvas for rendering graphic HBITMAP hbmpOld = (HBITMAP)SelectObject(hdcMem, bmMem); Gdiplus::Graphics graphics(hdcMem); // Base image is a pic of a folder Gdiplus::RectF canvasDest(0,0,128,128); graphics.DrawImage(box->grab("black_folder").pBitmap_, canvasDest, 0,0,128,128, Gdiplus::UnitPixel); // Overlay a pic of some tools in center of folder Gdiplus::RectF canvasDest2(30,50,64,64); // resize half actual size graphics.DrawImage(box->grab("work_tools").pBitmap_, canvasDest2, 0,0,128,128, Gdiplus::UnitPixel); // Overlay a pic of a cog in upper left corner of folder Gdiplus::RectF canvasDest1(16,16,32,32); // resize half actual size graphics.DrawImage(box->grab("cog_edit").pBitmap_, canvasDest1, 0,0,32,32, Gdiplus::UnitPixel); // Prepare to alpha blend the canvas with the screen BLENDFUNCTION blend = { 0 }; blend.BlendOp = AC_SRC_OVER; blend.SourceConstantAlpha = 255; blend.AlphaFormat = AC_SRC_ALPHA; // Composite the canvas with the screen into the layered window POINT ptZero = { 0 }; UpdateLayeredWindow(hwnd_, hdcScreen, &ptOrigin, &sizeSplash, hdcMem, &ptZero, RGB(0, 0, 0), &blend, ULW_ALPHA); // Delete temporary objects used for canvas SelectObject(hdcMem, hbmpOld); DeleteObject(bmMem); DeleteDC(hdcMem); ReleaseDC(NULL, hdcScreen); // Update mouse hit-test coordinates GetWindowRect(hwnd_, &rcMousedown_); } </code></pre> The layered window composed of the three bitmaps look like this on the screen : -- guess I don't have enough reputation to post the image :( Here's the link though - <a href="http://i.stack.imgur.com/HmU7H.png" rel="nofollow">http://i.stack.imgur.com/HmU7H.png</a>
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1. This table or related slice is empty.
PostParentId
1. POWindows splash screen using GDI+
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PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
1. USPotOfCoffee2Go
UserOwnerUserId
1. USPotOfCoffee2Go
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1. VO
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