1. JPEG Resolution
- Posted by Alex Chamberlain <alex.chamberlain at tiscali.co.uk> Mar 11, 2006
- 522 views
- Last edited Mar 12, 2006
Hi, Can anyone help me by providing a function to tell me the resolution of a JPEG File? I'm using GD at the moment. Thanks, Alex
2. Re: JPEG Resolution
- Posted by Al Getz <Xaxo at aol.com> Mar 12, 2006
- 519 views
Alex Chamberlain wrote: > > Hi, > > Can anyone help me by providing a function to tell me the resolution of a JPEG > File? > > I'm using GD at the moment. > > Thanks, > > Alex Hi there, Are you talking about the DPI (dots per inch) ? Take care, Al And, good luck with your Euphoria programming! My bumper sticker: "I brake for LED's"
3. Re: JPEG Resolution
- Posted by Alex Chamberlain <alex.chamberlain at tiscali.co.uk> Mar 12, 2006
- 523 views
Al Getz wrote: > > Alex Chamberlain wrote: > > > > Hi, > > > > Can anyone help me by providing a function to tell me the resolution of a > > JPEG > > File? > > > > I'm using GD at the moment. > > > > Thanks, > > > > Alex > > Hi there, > > > Are you talking about the DPI (dots per inch) ? > > > Al Yeah!
4. Re: JPEG Resolution
- Posted by Al Getz <Xaxo at aol.com> Mar 13, 2006
- 530 views
- Last edited Mar 14, 2006
Alex Chamberlain wrote: > > Al Getz wrote: > > > > Alex Chamberlain wrote: > > > > > > Hi, > > > > > > Can anyone help me by providing a function to tell me the resolution of a > > > JPEG > > > File? > > > > > > I'm using GD at the moment. > > > > > > Thanks, > > > > > > Alex > > > > Hi there, > > > > > > Are you talking about the DPI (dots per inch) ? > > > > > > Al > > Yeah! Hi again Alex, Sorry, i have an inch thick stack of notes on the jpg file format and i cant seem to find anything on the dpi of the file. It's been so long now since i've worked with this i dont remember how to find or calculate this. Maybe ask again or on another forum? Take care, Al And, good luck with your Euphoria programming! My bumper sticker: "I brake for LED's"
5. Re: JPEG Resolution
- Posted by Brian Broker <brian_broker at yahoo.com> Mar 13, 2006
- 527 views
- Last edited Mar 14, 2006
Al Getz wrote: > > Alex Chamberlain wrote: > > > > Al Getz wrote: > > > > > > Alex Chamberlain wrote: > > > > > > > > Hi, > > > > > > > > Can anyone help me by providing a function to tell me the resolution of > > > > a JPEG > > > > File? > > > > > > > > I'm using GD at the moment. > > > > > > > > Thanks, > > > > > > > > Alex > > > > > > Hi there, > > > > > > > > > Are you talking about the DPI (dots per inch) ? > > > > > > > > > Al > > > > Yeah! > > > Hi again Alex, > > > Sorry, i have an inch thick stack of notes on the jpg file format > and i cant seem to find anything on the dpi of the file. It's > been so long now since i've worked with this i dont remember how > to find or calculate this. Maybe ask again or on another > forum? > > > Al > > > My bumper sticker: "I brake for LED's" Correct me if I'm wrong but isn't DPI a measurement of an output device? How big is a pixel? http://heim.ifi.uio.no/~gisle/photo/pixels.html -- Brian
6. Re: JPEG Resolution
- Posted by Al Getz <Xaxo at aol.com> Mar 13, 2006
- 507 views
- Last edited Mar 14, 2006
Brian Broker wrote: > > Al Getz wrote: > > > > Alex Chamberlain wrote: > > > > > > Al Getz wrote: > > > > > > > > Alex Chamberlain wrote: > > > > > > > > > > Hi, > > > > > > > > > > Can anyone help me by providing a function to tell me the resolution > > > > > of > a JPEG</font></i> > > > > > File? > > > > > > > > > > I'm using GD at the moment. > > > > > > > > > > Thanks, > > > > > > > > > > Alex > > > > > > > > Hi there, > > > > > > > > > > > > Are you talking about the DPI (dots per inch) ? > > > > > > > > > > > > Al > > > > > > Yeah! > > > > > > Hi again Alex, > > > > > > Sorry, i have an inch thick stack of notes on the jpg file format > > and i cant seem to find anything on the dpi of the file. It's > > been so long now since i've worked with this i dont remember how > > to find or calculate this. Maybe ask again or on another > > forum? > > > > > > Al > > > > > > My bumper sticker: "I brake for LED's" > > Correct me if I'm wrong but isn't DPI a measurement of an output device? > > How big is a pixel? > <a > href="http://heim.ifi.uio.no/~gisle/photo/pixels.html">http://heim.ifi.uio.no/~gisle/photo/pixels.html</a> > > -- Brian Hi Brian, What i was assuming was that he was after something like the bitmap file header contains: PelsPerMeter for Vertical and Horizontal, but couldnt find anything that had a unit of length in it. It's possible to calculate (for jpg) but i cant seem to find the doc's on it. I think it's because when i was doing my jpg decoder i had no use for the resolution data because most of the time there's only one picture to choose from and one monitor to choose from. I think the last time i worked on my .jpg decoder (in the archives) was around 1999 or so. Take care, Al And, good luck with your Euphoria programming! My bumper sticker: "I brake for LED's"
7. Re: JPEG Resolution
- Posted by Brian Broker <brian_broker at yahoo.com> Mar 14, 2006
- 515 views
Al Getz wrote: > > Brian Broker wrote: > > > > Al Getz wrote: > > > > > > Alex Chamberlain wrote: > > > > > > > > Al Getz wrote: > > > > > > > > > > Alex Chamberlain wrote: > > > > > > > > > > > > Hi, > > > > > > > > > > > > Can anyone help me by providing a function to tell me the resolution > > > > > > of > > a JPEG</font></i> > > > > > > File? > > > > > > > > > > > > I'm using GD at the moment. > > > > > > > > > > > > Thanks, > > > > > > > > > > > > Alex > > > > > > > > > > Hi there, > > > > > > > > > > > > > > > Are you talking about the DPI (dots per inch) ? > > > > > > > > > > > > > > > Al > > > > > > > > Yeah! > > > > > > > > > Hi again Alex, > > > > > > > > > Sorry, i have an inch thick stack of notes on the jpg file format > > > and i cant seem to find anything on the dpi of the file. It's > > > been so long now since i've worked with this i dont remember how > > > to find or calculate this. Maybe ask again or on another > > > forum? > > > > > > > > > Al > > > > > > > > > My bumper sticker: "I brake for LED's" > > > > Correct me if I'm wrong but isn't DPI a measurement of an output device? > > > > How big is a pixel? > > <a > > href="http://heim.ifi.uio.no/~gisle/photo/pixels.html">http://heim.ifi.uio.no/~gisle/photo/pixels.html</a> > > > > -- Brian > > Hi Brian, > > > What i was assuming was that he was after something like the bitmap > file header contains: PelsPerMeter for Vertical and Horizontal, > but couldnt find anything that had a unit of length in it. > It's possible to calculate (for jpg) but i cant seem to find the doc's on it. > I think it's because when i was doing my jpg decoder i had no use > for the resolution data because most of the time there's only one picture > to choose from and one monitor to choose from. > I think the last time i worked on my .jpg decoder (in the archives) was > around 1999 or so. > > > Al > > > My bumper sticker: "I brake for LED's" But I wonder how many apps actually use "PelsPerMeter"? There seem to be few explanations of what this info is for. I did find this: "The PelsPerMeter fields doesn't seem to be particularly important, is often just set to zero, and is supposed to describe how many pixels are to be displayed in one meter of space (in case anyone has a monitor a meter wide). This seems to relate to how the bitmap was intended to be displayed and viewed." To me, that seems to imply that a viewer app using this information would have to stretch and/or compress an image to make it fit an intended area. But still I wonder how many image viewers or printer drivers actually do this? -- Brian
8. Re: JPEG Resolution
- Posted by Chris Burch <chriscrylex at aol.com> Mar 14, 2006
- 505 views
Hi Doesn't a graphic file, any graphic, just have a dimension, eg 320 * 240 pixels, loaded into memory from whatever format, manipulated, then output to whatever format? Chris http://members.aol.com/chriscrylex/euphoria.htm http://uboard.proboards32.com/ http://members.aol.com/chriscrylex/EUSQLite/eusql.html
9. Re: JPEG Resolution
- Posted by Brian Broker <brian_broker at yahoo.com> Mar 14, 2006
- 512 views
Chris Burch wrote: > > Hi > > Doesn't a graphic file, any graphic, just have a dimension, eg 320 * 240 > pixels, > loaded into memory from whatever format, manipulated, then output to whatever > format? > > Chris > > <a > href="http://members.aol.com/chriscrylex/euphoria.htm">http://members.aol.com/chriscrylex/euphoria.htm</a> > <a href="http://uboard.proboards32.com/">http://uboard.proboards32.com/</a> > <a > href="http://members.aol.com/chriscrylex/EUSQLite/eusql.html">http://members.aol.com/chriscrylex/EUSQLite/eusql.html</a> Well, that's what I thought but here's some more info that I found interesting. Apparently the jpeg format does have a DPI setting that apps might use. http://www.rdpslides.com/pptfaq/FAQ00075.htm -- Brian
10. Re: JPEG Resolution
- Posted by Al Getz <Xaxo at aol.com> Mar 14, 2006
- 540 views
Hello Chris and Brian, None of my apps ever used PelsPerMeter because as i was saying before i usually only have one pic to display and one monitor. The PPM could be used to convert to DPI and that would allow you to select between a two of pictures which are both the same but with different dpi...you could select the picture that was closest to the dpi of the monitor (i guess). For example, say you have these two pics: pic1A.bmp pic1B.bmp and pic1A had 96 dpi and pic1B and 180 dpi, and the display was 96 dpi, i guess you would select the 96 dpi one. I myself have never had the need to do this so i never use the dpi, and whenever i create a new bitmap file i load the pelspermeter params both with zero. I guess if you load with some dpi value you might control how the picture is supposed to be displayed if the viewer uses this data. The viewer that comes with WinXP seems to get and display the dpi of a jpg file when you look at the properties, but i dont see how it actually uses this info to display the picture itself because the picture comes up in whatever size window you have set for the viewer anyway if the pic is larger and smaller than the viewer area if the pic is smaller. I noticed also that when creating bitmaps the dpi values (i guess pelspermeter is calculated from the dpi of the current display and the number of dots up and down) are set in some painting programs so the file properties shows a dpi value for both H and V. Take care, Al And, good luck with your Euphoria programming! My bumper sticker: "I brake for LED's"
11. Re: JPEG Resolution
- Posted by Jeremy Peterson <ptl99 at hotmail.com> Mar 14, 2006
- 502 views
Brian Broker wrote: > Correct me if I'm wrong but isn't DPI a measurement of an output device? > > How big is a pixel? > <a > href="http://heim.ifi.uio.no/~gisle/photo/pixels.html">http://heim.ifi.uio.no/~gisle/photo/pixels.html</a> > > -- Brian DPI means dots per inch, and just measures how many pixels there are in one cubic inch of the screen. So when it's 64 by 64 DPI, that means that an inch of the picture is 64 pixels long and 64 pixels wide. Jeremy Edmund Burke: "All that is necessary for evil to triumph is for good men to do nothing."
12. Re: JPEG Resolution
- Posted by Evan Marshall <1evan at sbcglobal.net> Mar 14, 2006
- 518 views
- Last edited Mar 15, 2006
Jeremy Peterson wrote: > > Brian Broker wrote: > > Correct me if I'm wrong but isn't DPI a measurement of an output device? > > > > How big is a pixel? > > <a > > href="http://heim.ifi.uio.no/~gisle/photo/pixels.html">http://heim.ifi.uio.no/~gisle/photo/pixels.html</a> > > > > -- Brian > > DPI means dots per inch, and just measures how many pixels there are in one > cubic inch of the screen. So when it's 64 by 64 DPI, that means that an inch > of the picture is 64 pixels long and 64 pixels wide. > > Jeremy > > Edmund Burke: "All that is necessary for evil to triumph is for good men to > do nothing." Does that mean an image on a 21" monitor has a larger DPI than a 14" monitor, or are the pixels 1.5 times larger on a 21" monitor?
13. Re: JPEG Resolution
- Posted by Jeremy Peterson <ptl99 at hotmail.com> Mar 14, 2006
- 527 views
- Last edited Mar 15, 2006
It depends on what resolution you set it at. If they both have the same resolution, it would be the latter. Jeremy
14. Re: JPEG Resolution
- Posted by Evan Marshall <1evan at sbcglobal.net> Mar 15, 2006
- 512 views
Jeremy Peterson wrote: > > DPI means dots per inch, and just measures how many pixels there are in one > cubic inch of the screen. ..... > It depends on what resolution you set it at. If they both have the same > resolution, > it would be the latter. > > Jeremy If you have a 64x64 DPI image and a 14" monitor set to 800x600 and a 21" monitor set to 800x600, then by your first post, both monitors show the image with identical dimensions (1 *square* inch), but how can that be if the pixels are larger on the 21" monitor?
15. Re: JPEG Resolution
- Posted by "Patrick Barnes" <mrtrick at gmail.com> Mar 15, 2006
- 515 views
On 3/15/06, Evan Marshall <guest at rapideuphoria.com> wrote: > If you have a 64x64 DPI image and a 14" monitor set to 800x600 and a 21" > monitor set to 800x600, then by your first post, both monitors show the i= mage > with identical dimensions (1 *square* inch), but how can that be if the p= ixels > are larger on the 21" monitor? monitor dimensions * DPI = resolution Thus, a 64x64 DPI image of a given resolution will take up a certain amount of screen real-estate... often DPI is ignored for a monitor's display, as DPI is fixed to the screen's resolution. -- MrTrick ----------
16. Re: JPEG Resolution
- Posted by Al Getz <Xaxo at aol.com> Mar 15, 2006
- 543 views
Evan Marshall wrote: > > Jeremy Peterson wrote: > > > > DPI means dots per inch, and just measures how many pixels there are in one > > cubic inch of the screen. > ..... > > It depends on what resolution you set it at. If they both have the same > > resolution, > > it would be the latter. > > > > Jeremy > > > If you have a 64x64 DPI image and a 14" monitor set to 800x600 and a 21" > monitor set to 800x600, then by your first post, both monitors show the image > with identical dimensions (1 *square* inch), but how can that be if the pixels > are larger on the 21" monitor? Hi there, By knowing the dpi of the pic and the dpi of the monitors i think it's possible to display the picture making it appear the same size (approximately) on both monitors...thus a pic that was originally sized at 1 inch by 1 inch would show up on BOTH monitors as 1 inch by inch...but who does this? Most viewers try to display the pic as large as possible i think so that they map each sample of the pic to each pixel of the display. Examples of where the dpi would be more important would probably be in medical or industrial applications, where you may want each (dentistry, say) tooth to show up as real size regardless of what size monitor the Dr. (dentist) is using. If you want buttons to display the same size on different monitors you may wish to draw them using the dpi of the display as one of the params too. If you want the button 1 inch wide on a 96 dpi monitor i guess you'd need 96 pixels across, while on a 180 dpi monitor you'd need 180 pixels across, so the width param in these two cases would be either 96 or 180. I did some calculations just for the heck of it but im in a hurry right now...i'll try to post later today. Take care, Al And, good luck with your Euphoria programming! My bumper sticker: "I brake for LED's"
17. Re: JPEG Resolution
- Posted by Alex Chamberlain <alex.chamberlain at tiscali.co.uk> Mar 15, 2006
- 515 views
- Last edited Mar 16, 2006
Hi, I was only really interested in DPI, as for a decent photo print you need at least 300dpi. Alex
18. Re: JPEG Resolution
- Posted by Bernie Ryan <xotron at bluefrog.com> Mar 15, 2006
- 489 views
- Last edited Mar 16, 2006
Al Getz wrote: > > By knowing the dpi of the pic and the dpi of the monitors i think > it's possible to display the picture making it appear the same size > (approximately) on both monitors...thus a pic that was originally > sized at 1 inch by 1 inch would show up on BOTH monitors as > 1 inch by inch...but who does this? Most viewers try to display > the pic as large as possible i think so that they map each sample > of the pic to each pixel of the display. > Examples of where the dpi would be more important would probably > be in medical or industrial applications, where you may want each > (dentistry, say) tooth to show up as real size regardless of what > size monitor the Dr. (dentist) is using. > > If you want buttons to display the same size on different monitors > you may wish to draw them using the dpi of the display as one of > the params too. If you want the button 1 inch wide on a 96 dpi > monitor i guess you'd need 96 pixels across, while on a 180 dpi > monitor you'd need 180 pixels across, so the width param in these > two cases would be either 96 or 180. > > I did some calculations just for the heck of it but im in a hurry > right now...i'll try to post later today. Al: There is another thing you have to take into account. Two montors can be 19 inch montors which is the physical distance measured diagonally across the corners. But these monitors can have different dots per inch which is the physical distance between the three dot (RGB) clusters that which represent one pixel. So how could a program be written to be sure that a picture would be always the exact same size. The only answer would be to have a program that could be calibrated by the end user with a ruler. Bernie My files in archive: WMOTOR, XMOTOR, W32ENGIN, MIXEDLIB, EU_ENGIN, WIN32ERU, WIN32API Can be downloaded here: http://www.rapideuphoria.com/cgi-bin/asearch.exu?dos=on&win=on&lnx=on&gen=on&keywords=bernie+ryan
19. Re: JPEG Resolution
- Posted by Pete Stoner <stoner.pete at gmail.com> Mar 16, 2006
- 519 views
Al Getz wrote: > > If you want buttons to display the same size on different monitors > you may wish to draw them using the dpi of the display as one of > the params too. If you want the button 1 inch wide on a 96 dpi > monitor i guess you'd need 96 pixels across, while on a 180 dpi > monitor you'd need 180 pixels across, so the width param in these > two cases would be either 96 or 180. On the subject of correcly sizing for different resolutions, its not so much wanting buttons to be the same size its more that the same font will be larger at higher resolutions. This can mean that any text may be too large for its control. As I wanted my apps to look good regardless of the users resolution setting I came up with the following code.
without warning without trace include win32lib.ew global constant -- for correct window centering on screen (UK spelling of 'centre'!) Centre = "Centre" constant xPARAMS = 1, yPARAMS = 2, cxPARAMS = 3, cyPARAMS = 4, X = 1, Y = 2 atom dc atom cxDpi, cyDpi dc = getDC ( Screen ) cxDpi=(w32Func(xGetDeviceCaps,{dc,LOGPIXELSX})/96) cyDpi=(w32Func(xGetDeviceCaps,{dc,LOGPIXELSY})/96) releaseDC(Screen) integer centerScreenX, centerScreenY sequence ScreenSize ScreenSize = getRect(Screen) centerScreenX = floor( ScreenSize[3]/2 ) centerScreenY = floor( ScreenSize[4]/2 ) function DI(integer Orientation, object pixels) if Orientation = X then return floor(pixels * cxDpi) elsif Orientation = Y then return floor(pixels * cyDpi) end if end function global function dpiCreateEx(integer pControl, sequence caption, atom pOwner, object x, object y, object cx, object cy, object styleFlags, object exFlags ) sequence params sequence IgnoreControls -- controls not needing DPI change params = {x, y, cx, cy} IgnoreControls = {Menu, MenuItem} if not find(pControl, IgnoreControls) then -- if control is a Window then leave position stuff alone if pControl != Window then -- chk for relational positioning i.e. ix X < 1 then -- x position must be a 0.x (%) value so leave alone if integer(x) and x > 1 then params[xPARAMS] = DI(X, x) -- also handle w32lib constant calls like 'Center' and {w32AltEdge. -20} elsif sequence(x) and atom(x[2]) and length(x) = 2 then params[xPARAMS] = x params[xPARAMS][2] = DI(X, x[2]) end if if integer(y) and y > 1 then params[yPARAMS] = DI(Y, y) elsif sequence(y) and atom(y[2]) and length(y) = 2 then params[yPARAMS] = y params[yPARAMS][2] = DI(Y, y[2]) end if end if if integer(cx) and cx > 1 then params[cxPARAMS] = DI(X, cx) elsif sequence(cx) and atom(cx[2]) and length(cx) = 2 then params[cxPARAMS] = cx params[cxPARAMS][2] = DI(X, cx[2]) end if if pControl != SortedCombo then if integer(cy) and cy > 1 then params[cyPARAMS] = DI(Y, cy) elsif sequence(cy) and atom(cy[2]) and length(cy) = 2 then params[cyPARAMS] = cy params[cyPARAMS][2] = DI(Y, cy[2]) end if else params[cyPARAMS] = cy end if end if if pControl = Window then -- if control is a 'centered' Window then correctly center it! if equal(x, Centre) then params[xPARAMS] = centerScreenX - floor( params[cxPARAMS]/2 ) end if if equal(y, Centre) then params[yPARAMS] = centerScreenY - floor( params[cyPARAMS]/2 ) end if end if return createEx( pControl, caption, pOwner, params[xPARAMS], params[yPARAMS],params[cxPARAMS], params[cyPARAMS], styleFlags, exFlags) end function global function dpiCreate(integer pControl, sequence caption, atom pOwner, object x, object y, object cx, object cy, object styleFlags ) return dpiCreateEx( pControl, caption, pOwner, x, y, cx, cy, styleFlags, 0) end function
As you may notice its had a few tweaks to fix issues like Win32lib not centering a 'sub' window correctly to the screen etc.. Since I do all my programing on a 96dpi screen I code it as normal but call dpiCreate instead of the normal win32lib 'create', if I then check on a screen set to 120dpi it still looks good (I even tried a custom setting of 150dpi and it still looked good). Once I'm certain that I cope correctly with most types of controls then I'll add it to the archive. PeteS
20. Re: JPEG Resolution
- Posted by Al Getz <Xaxo at aol.com> Mar 16, 2006
- 544 views
Pete Stoner wrote: > > Al Getz wrote: > > > > If you want buttons to display the same size on different monitors > > you may wish to draw them using the dpi of the display as one of > > the params too. If you want the button 1 inch wide on a 96 dpi > > monitor i guess you'd need 96 pixels across, while on a 180 dpi > > monitor you'd need 180 pixels across, so the width param in these > > two cases would be either 96 or 180. > > On the subject of correcly sizing for different resolutions, its not so much > wanting buttons to be the same size its more that the same font will be larger > at higher resolutions. This can mean that any text may be too large for its > control. As I wanted my apps to look good regardless of the users resolution > setting I came up with the following code. > > }}} <eucode> > without warning > without trace > include win32lib.ew > > global constant > -- for correct window centering on screen (UK spelling of 'centre'!) > Centre = "Centre" > > constant > xPARAMS = 1, > yPARAMS = 2, > cxPARAMS = 3, > cyPARAMS = 4, > X = 1, > Y = 2 > > atom dc > atom cxDpi, cyDpi > > dc = getDC ( Screen ) > cxDpi=(w32Func(xGetDeviceCaps,{dc,LOGPIXELSX})/96) > cyDpi=(w32Func(xGetDeviceCaps,{dc,LOGPIXELSY})/96) > releaseDC(Screen) > > integer centerScreenX, centerScreenY > sequence ScreenSize > ScreenSize = getRect(Screen) > centerScreenX = floor( ScreenSize[3]/2 ) > centerScreenY = floor( ScreenSize[4]/2 ) > > function DI(integer Orientation, object pixels) > if Orientation = X then > return floor(pixels * cxDpi) > elsif Orientation = Y then > return floor(pixels * cyDpi) > end if > end function > > global function dpiCreateEx(integer pControl, sequence caption, atom pOwner, > object x, object y, object cx, object cy, object styleFlags, > object exFlags > ) > sequence params > sequence IgnoreControls -- controls not needing DPI change > params = {x, y, cx, cy} > > IgnoreControls = {Menu, MenuItem} > > if not find(pControl, IgnoreControls) then > -- if control is a Window then leave position stuff alone > > if pControl != Window then > -- chk for relational positioning i.e. ix X < 1 then > -- x position must be a 0.x (%) value so leave alone > if integer(x) and x > 1 then > params[xPARAMS] = DI(X, x) > -- also handle w32lib constant calls like 'Center' and {w32AltEdge. -20} > elsif sequence(x) and atom(x[2]) and length(x) = 2 then > params[xPARAMS] = x > params[xPARAMS][2] = DI(X, x[2]) > end if > if integer(y) and y > 1 then > params[yPARAMS] = DI(Y, y) > elsif sequence(y) and atom(y[2]) and length(y) = 2 then > params[yPARAMS] = y > params[yPARAMS][2] = DI(Y, y[2]) > end if > end if > > if integer(cx) and cx > 1 then > params[cxPARAMS] = DI(X, cx) > elsif sequence(cx) and atom(cx[2]) and length(cx) = 2 then > params[cxPARAMS] = cx > params[cxPARAMS][2] = DI(X, cx[2]) > end if > if pControl != SortedCombo then > if integer(cy) and cy > 1 then > params[cyPARAMS] = DI(Y, cy) > elsif sequence(cy) and atom(cy[2]) and length(cy) = 2 then > params[cyPARAMS] = cy > params[cyPARAMS][2] = DI(Y, cy[2]) > end if > else > params[cyPARAMS] = cy > end if > end if > > if pControl = Window then > -- if control is a 'centered' Window then correctly center it! > if equal(x, Centre) then params[xPARAMS] = centerScreenX - floor( > params[cxPARAMS]/2 > ) > end if > if equal(y, Centre) then params[yPARAMS] = centerScreenY - floor( > params[cyPARAMS]/2 > ) > end if > end if > > return createEx( pControl, caption, pOwner, params[xPARAMS], > params[yPARAMS],params[cxPARAMS], > params[cyPARAMS], styleFlags, exFlags) > > end function > > global function dpiCreate(integer pControl, sequence caption, atom pOwner, > object x, object y, object cx, object cy, object styleFlags ) > <snip> Hi PeteS, I was thinking that i would want my apps to have buttons (maybe other stuff too) the same size on any monitor, as well as the text size. The reason is, what good is larger text if it doesnt fit inside the button? Any ideas? How about a trick to get the actual size (in inches) of the monitor H and V ? Take care, Al And, good luck with your Euphoria programming! My bumper sticker: "I brake for LED's" From "Black Knight": "I can live with fighting the good fight, but i can not live without fighting it".
21. Re: JPEG Resolution
- Posted by Pete Stoner <stoner.pete at gmail.com> Mar 16, 2006
- 491 views
Al Getz wrote: > > Pete Stoner wrote: > > > > Al Getz wrote: > > > > > > If you want buttons to display the same size on different monitors > > > you may wish to draw them using the dpi of the display as one of > > > the params too. If you want the button 1 inch wide on a 96 dpi > > > monitor i guess you'd need 96 pixels across, while on a 180 dpi > > > monitor you'd need 180 pixels across, so the width param in these > > > two cases would be either 96 or 180. > > > > On the subject of correcly sizing for different resolutions, its not so much > > wanting buttons to be the same size its more that the same font will be > > larger > > at higher resolutions. This can mean that any text may be too large for its > > control. As I wanted my apps to look good regardless of the users resolution > > setting I came up with the following code. <snip> > > Hi PeteS, > > > I was thinking that i would want my apps to have buttons (maybe other > stuff too) the same size on any monitor, as well as the text size. > The reason is, what good is larger text if it doesnt fit inside > the button? > Any ideas? > > How about a trick to get the actual size (in inches) of the monitor > H and V ? > > > Al > Hi Al, I'm not sure you can have the button always the exact same size and if you did there seems to be no way to avoid the font being increased in size. Just to further complicate things I did see somewhere a mention that the 'pixels per inch' stuff was sometimes talking about a *virtual* inch!! As the fonts are larger at a higher res what the code I posted does (or best attempt at!) is resize/reposition all the controls to match that increase including the window size itself, otherwise your buttons get bigger and may overlap an adjacent one or be clipped by their window. I did lots of googling on this and it generally seems to be a mess and could not find any one recommended way to handle it.. It seemed using Dialog units in place of pixels was the way to go at one stage, but then I found that doesn't work very well. My current method seems the best so far.. PeteS
22. Re: JPEG Resolution
- Posted by Jeremy Peterson <ptl99 at hotmail.com> Mar 17, 2006
- 535 views
Evan Marshall wrote: > > Jeremy Peterson wrote: > > > > DPI means dots per inch, and just measures how many pixels there are in one > > cubic inch of the screen. > ..... > > It depends on what resolution you set it at. If they both have the same > > resolution, > > it would be the latter. > > > > Jeremy > > > If you have a 64x64 DPI image and a 14" monitor set to 800x600 and a 21" > monitor set to 800x600, then by your first post, both monitors show the image > with identical dimensions (1 *square* inch), but how can that be if the pixels > are larger on the 21" monitor? The pixels do not get bigger. That previous post was a mistake. It would show the image the same size on both monitors, but there would be more room on the 21" to display something else. Jeremy