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Topic: BitBLT

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	BitBlt (Site not responding. Last check: 2007-09-07)
		Operations on objects are normally described as methods, not by instances of a class.
		As a result, it was decided to use instances of a class (BitBlt) rather than a method to represent copy operations.
		The name BitBlt is derived from a powerful bit-boundary block transfer instruction of that name found on one of the first machines to support Smalltalk, the Xerox Alto.
	minnow.cc.gatech.edu /squeak/189 (411 words)

	[No title]
		If bitblt is used to scroll or move * windows around, then the source and destination graphics memory * buffer is identical, and only the source and destination rectangles * are different.
		If bitblt is used to "flip" to the next page, * however, the source and destination graphics memory regions will be * different.
		(bitblt is used to copy the current page to the * previous-page graphics memory buffer, and then copy the next-page * buffer to the visible buffer.
	www-cse.ucsd.edu /classes/fa99/cse30/assn6/hilevel.c (473 words)

	QPaintDevice Class (Site not responding. Last check: 2007-09-07)
		void bitBlt (QPaintDevice * dst, const QPoint and dp, const QPaintDevice * src, const QRect and sr, RasterOp rop)
		The bit block transfer is an extremely useful operation for copying pixels from one paint device to another (or to itself).
		It is implemented as the global function bitBlt().
	doc.trolltech.com /3.3/qpaintdevice.html (1345 words)

	......: the VB workshop - BitBlt API Tutorial Page :......
		The BitBlt API call was the first API I learned how to implement, as I suspect may be the case with many who may come across this tutorial.
		The Bitblt API is a function exposed by the GDI32.dll, which is made available for use within your Visual Basic projects with the below (or similar) declaration.
		BitBlt allows you to transfer those pixels to your destination in a number of different ways.
	www.vbexplorer.com /VBExplorer/library/bitbltprimer.asp (3487 words)

	Xtreme Visual Basic Talk - PictureBox / Label / BitBlt problem
		The reason why it has to be a picturebox, and not an image, is because i am having to use the BitBlt function (-so..i need to use a picturebox)..
		Using Bitblt is a good thing-- so why not keep going in that direction.
		This will probably be my last resort (bitblt'ing the text), but, it seems like it would be the most efficient since i use the bitblt function several times in my program.
	www.xtremevbtalk.com /t148808.html (1651 words)

	GameDev.net - Isometric Tiles
		If the method you are using to bitblt the tile does not support transparent bitblt'ing, then a mask of the tile being bitblt is needed.
		This is one drawback to having 3 dimensions.
		When drawing tiles with a tile base other than 0, simply move the tile up on the Y coordinate prior to the bitblt and then bitblt at that point.
	www.gamedev.net /reference/articles/article738.asp (1044 words)

	[No title]
		I'll leave the other techniques for you to explore (and, hopefully, share with me.) Setting up the picture box controls is pretty straightforward, set the size of the control to the size of the bitmap and set the picture property to the name of the bitmap.
		BitBlt - The Bitmap Blaster To handle the moving and manipulating of the images, we'll use the API routine BitBlT (Bit Block Transfer).
		BitBlt copies a rectangular area of a bitmap in a specified source device context (DC) to a specified destination DC.
	www.geocities.com /SiliconValley/Ridge/3505/vb4gamet.txt (3630 words)

	Visual Basic Explorer- Games, Animation & Drawing
		This sample project demonstrates the use of the BitBlt function to draw a bitmap from a picturebox to a form.
		NOTE: Since the BitBlt function expects the parameters to be in pixels, the ScaleMode property of the picturebox and the form has been changed from 1-Twips to 3-Pixels.
		To simplify, if we could hear BitBlt thinking, we might hear something like this "Ok, so now I have this fl pixel from the source and I am going to copy it to the destination which is gray.
	www.vbexplorer.com /VBExplorer/gdi1.asp (3292 words)

	EliteVB (Site not responding. Last check: 2007-09-07)
		As such we have to go to greater lengths to change the background color, implementing a full bitblt color replacement procedure in place of the FillRect and OD Tab method from the first article.
		While not difficult, a BitBlt color swap must be done in a specific set of steps.
		We BitBlt the mask from Stage 3 followed by the image from Stage 2 with two different ROP constants (vbSrcCopy and vbSrcPaint, respectively), thereby removing the button face color.
	www.elitevb.com /content/01,0093,01/02.aspx (646 words)

	Edit BitBlt (Site not responding. Last check: 2007-09-07)
		393: Instances of class BitBlt (Block Transfer) describe a single graphical operation (often copy operations) Operations on objects are normally described as methods, not by instances of a class.
		392: The name BitBlt is derived from a powerful bit-boundary block transfer instruction of that name found on one of the first machines to support Smalltalk, the Xerox Alto.
		=(BitBlt =destForm: Display =sourceForm: Display =halftoneForm: nil =combinationRule: Form over =destOrigin: 120@120 =sourceOrigin: 0@0 =extent: 100@100 =clipRect: Display computeBoundingBox) =copyBits _ January 04, 2004 Boris Gaertner relied to the following questionf from Martin Kuball Question: I'm trying to do some image processing in Squeak.
	minnow.cc.gatech.edu /squeak/189.edit (452 words)

	VBGamer - The latest VB Gaming news, reviews, and info
		For the record, I mean no offence to anyone on the PSC community, I was going to call it BitBlt for Dummies like the popular For Dummies books, but didn't want to get into copyright complications with book publishers.
		The goal of this tutorial is to step-by-step explain howto use BitBlt and some other Win32 GDI functions, to accomplish tasks such as double buffering and loading sprites from files - All in a relatively short reading-time (basically i'll try not to ramble on too much) Anyways, let's get started...
		BitBlt is a function in the DLL "gdi32".
	www.vbgamer.com /tutorial.asp?ndx=20 (1961 words)

	BitBlt : Java Glossary
		They may have special bitblt instructions to shovel 512 bits around at a pop, shift to deal with any misalignment, and mask to avoid touching surrounding bits.
		A standard Pentium CPU, in contrast, does bitblts only 32 bits at a time, and has to do the shift and mask as separate operations.
		Text drawing is usually implemented by having precomposed images of the glyphs in the invisible part of video RAM, and using the GPU to bitblt them to the onscreen part.
	mindprod.com /jgloss/bitblt.html (295 words)

	Xtreme Visual Basic Talk - Trouble with BitBlt..
		However those Bitblts that use Me.hdc are number of pixels from the form's origin.
		So the bitblting (with transparent background) is working...leave the picRocket non-visible and it still works to orient the sprite positioning and for collision control.
		By doing so you obliterate the first bitblt of the rocket sprite (restoring frmLevel1.frm to look like its original state before ANY rocket sprite was bitblt-ed) and get the background ready to receive the second rocket sprite bitblting in it's new (slightly offset) position--with no smearing.
	www.visualbasicforum.com /t122730.html (1923 words)

	Programmer's Corner - theraje's VB6 Game Tutorial Series I - Drawing with Bitblt
		The only things that really changed were that we called bitblt twice, and changed some of the arguments.
		We declared one static variable (a static variable is declared locally, but keeps its value even after the end of the procedure it is called in) to store what frame we want to draw.
		All we have to do is adjust the x and y coordinates before drawing her to the destination picturebox.
	programmers-corner.com /view-article.php/45 (2521 words)

	Xtreme Visual Basic Talk - Bitblt Collision
		Bitblt collision is different then picture box collision but not by much.
		Yeah, that's from picture boxes but what i am saying is use the same idea but use variables that you are using to bitblt your image.
		Switch the box.left with intleft or whatever your left variable is and do the same for the wall and the walls width.
	www.xtremevbtalk.com /t155441.html (1027 words)

	The Old Joel on Software Forum - Bitblt
		It might help us if you told us what graphics card machine B is running, and gave us a better understanding of how your code captures the screen and performs the bitblt.
		...and of course you have already determined that it is in fact the BitBlt that is slow, and not the other 4 lines of code...
		Be careful about interpreting profiles of your code because the BitBlt transfer is probably performed asynchronously.
	discuss.fogcreek.com /joelonsoftware?cmd=show&ixPost=41710 (1406 words)

	Function Guide - BitBlt Function (Site not responding. Last check: 2007-09-07)
		BitBlt performs a bit-block transfer of a rectangular portion of an image from one device to another.
		The dimensions of the transfered rectangle are perfectly preserved.
		The function can perform a variety of raster operations to transfer the block from the source device to the target device.
	pietschsoft.com /functionguide/function.aspx?functionid=5 (351 words)

	VB Helper: HowTo: Overlay a picture on another and use BitBlt to repaint only the modified parts of the background
		To move the foreground object, erase it using BitBlt to draw from the hidden picture to the visible picture.
		Finally, use BitBlt with the foreground image and opcode SRCAND to drop in the foreground image.
		Subroutine DrawPic restores the background picture by using BitBlt to copy the part of the background that is currently covered by the overlay onto picCanvas.
	www.vb-helper.com /howto_drag_picture_with_bitblt_repair.html (708 words)

	BitBlt (Site not responding. Last check: 2007-09-07)
		If a rotation or shear transformation is in effect in the source device context, BitBlt returns an error.
		If the color formats of the source and destination device contexts do not match, the BitBlt function converts the source color format to match the destination format.
		BitBlt returns an error if the source and destination device contexts represent different devices.
	msdn.microsoft.com /library/en-us/wceui40/html/cerefBitBlt.asp?frame=true (734 words)

	The Bdlg32.exe sample demonstrates four methods for how to place a bitmap on a dialog box in Visual C++
		In a Microsoft Foundation Class (MFC) Library application for Windows, it is occasionally useful to be able to display a bitmap larger than a normal icon in a dialog box.
		BitBlt() or StretchBlt() into a "static" frame control.
		The first method uses a simple BitBlt(), when the dialog box receives a WM_PAINT message, to paint a bitmap in a hard-coded location on a dialog box.
	support.microsoft.com /default.aspx?scid=kb;en-us;141863 (1249 words)

	[No title]
		There are several ways to set up a user-defined coordinate system using the painter, for example by QPainter::setWorldMatrix().
		If sw is 0 or sh is 0, then bitBlt will do nothing.
		BitBlt has two restrictions: 1 The src device must be QWidget or QPixmap.
	www.ibiblio.org /gferg/ldp/man/man3/QPaintDevice.3qt.html (610 words)

	Xtreme Visual Basic Talk - BitBlt Tutorial
		Well BitBlt is one of many windows API's and if your not sure on what or how to use API's then take a look at Optikal And Banjo's tutorial (http://www.xtremevbtalk.com/showthr...7andhighlight=api)
		Well a mask in terms of BitBlt is basicly a copy of the actuall image, in our case all fl, which we put on the background first to stop the background colours leaking through and spoiling our image :)
		Your tutorial is good, though you might want to take some more time to explain the "hows and whys" of the way it works.
	irc.visualbasicforum.com /printthread.php?t=126559 (942 words)

	theodore's visual basic site - programming tips
		The mask is a fl & white instanse of the sprite, the background of the rectangle region is white and the pixels withing the sprite are fl.
		The first call of BitBlt paints the mask of the sprite on the background by copying only the fl pixels in the lower half of picSprite on picBack.
		The second BitBlt paints the actual sprite on the mask by copying the non-fl pixels in the upper half of picSprite on the white pixels of picBack.
	www.geocities.com /SiliconValley/Network/5045/tricks.htm (4288 words)

	New BitBlt (Site not responding. Last check: 2007-09-07)
		In terms of low level graphics this means we (e.g., BitBlt) needs to be able to render to the very same surface that's used for graphics accelleration.
		If BitBlt has no or just a single colorMap it will operate on pixel words, trying to run the entire operation as fast as possible (e.g., in eight bit depth it will use four pixels at once).
		We'll be able to do very generic color space conversion within BitBlt, which would, for instance, allow us to render to a 4x4x4x4 RGBA texture which then in turn could be used for any 3D operation.
	minnow.cc.gatech.edu /squeak/1212 (1383 words)

	bitblt - OneLook Dictionary Search
		Tip: Click on the first link on a line below to go directly to a page where "bitblt" is defined.
		BitBLT : Stammtisch Beau Fleuve Acronyms [home, info]
		BITBLT : Butterfly Glossary (networking terminology) [home, info]
	www.onelook.com /cgi-bin/cgiwrap/bware/dofind.cgi?word=bitblt (85 words)

	Blt Testing (Site not responding. Last check: 2007-09-07)
		BitBlt is a low-level capability of any video card that allows bitmaps (either in raw form or in some pattern) to be copied from system memory to video memory, or from buffer to buffer on a video card.
		The Windows function called "BitBlt" is used for displaying the results of software rendering, or for software decoding of video playback.
		BitBlt is one of those functions that you will wait for.
	www.stereopsis.com /blttest (490 words)

	BlockBits (Site not responding. Last check: 2007-09-07)
		The figure shows some of the possible variations using the function BitBlt, including the use of a brush, as well as the simpler source and destination transfers.
		Notice also the there is no Destination source in the parameter list, this again is worked into the body of the method by including the term ‘hdc’, which makes the screen the destination device.
		If you want to see real uses of :M BitBlt:, the ‘blitmode’ SRCCOPY (direct copy of the source block to the destination block) is used twice early in the example program Windemo.dc.
	www.sunterr.demon.co.uk /Blt/blockbit.html (525 words)

	CodeGuru Forums - BitBlt problem (Site not responding. Last check: 2007-09-07)
		I've tried looking around previous posts on BitBlt's, but was unable to figure out the error in my code.
		'BitBlt' : redefinition; previous definition was a 'formerly unknown identifier'
		A lot of the lines at the top are auto-generated by VC++.NET 2003 when you create a new class.
	www.codeguru.com /forum/archive/index.php/t-313039.html (373 words)

	BitBlt or GUI faster? - GameDev.Net Discussion Forums
		I would think the BitBlt() would have less overhead than the GUI function.
		I tried just invalidating the region after drawing to the virtual window but sometimes updates came to late and it messed up the display (I am displaying audio data in real time).
		Now when I want to draw on the screen (for example I display waveform audio being received from the soundcard at quite rapid intervals by drawing the background rectangle and then plotting the waveform on top of it with Polyline().
	www.gamedev.net /community/forums/viewreply.asp?ID=824486 (622 words)

	_ TUTORIAL: BitBlt & GDI32 for the Thick-Head - visual basic, vb, vbscript
		"BitBlt [and GDI32] for the Thick Headed" is an in-depth, plain-english, streight-forward tutorial that teaches everything there is to know about BitBlt, and some related API.
		A Device Context is a number that points to an "address" in memory where data is stored, when using BitBlt, we point to the Address where graphical data is stored in memory.
		And why doesn't the image appear on the screen immediately after I use BitBlt; how does this work that placing a form HDC draws the image on the screen; what drawing powers does the form(windows) have that's not in our reach and why can't we tap into them and; I guess that's it for now.
	www.planetsourcecode.com /vb/scripts/ShowCode.asp?txtCodeId=36053&lngWId=1 (4171 words)

	vbAccelerator - Replace one Colour with another in a Picture using BitBlt
		This method uses BitBlt to ensure the operation is as speedy as possible, and will run very quickly.
		The picture ' goes fl where the colour is to be replaced, but is ' unaffected otherwise.
		When you click the button, one of the colours will be replaced using the BitBlt method.
	www.vbaccelerator.com /home/VB/Tips/Replace_One_Colour_With_Another_in_a_Picture/article.asp (266 words)

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