On Jun 11, 2:07 am, aku ankka <ju...@[EMAIL PROTECTED]
> wrote:
> On Jun 10, 8:14 pm, navid_ad <navid.fal...@[EMAIL PROTECTED]
> wrote:
>
>
>
> > Thanks eceryone for your help, I figured it out half way. First of
> > all, I decided to get it to work just on Windows
> > for right now, I tried getPixel and setPixel in a loop to read and
> > write all the pixels to/from a buffer,
> > it works but it is just too slow. It takes 6 seconds to read all
> > pixels and 3 seconds to write them.
> > Now I'm using GetDIBits to capture a screenshot to a buffer which is
> > very fast and I can even
> > save it to a bitmap file. and I can change colors in buffer. The part
> > that I couldn't get it to work is
> > the SetDIBits which is suppose to show the buffer onscreen.
>
> > On Jun 3, 5:55 pm, "jbwest" <jbw...@[EMAIL PROTECTED]
> wrote:
>
> > > "fungus" <openglMYSO...@[EMAIL PROTECTED]
> wrote in message
>
> >
>news:9f7d5e71-68cc-41e2-84d7-d7e0b02462c2@[EMAIL PROTECTED]
>
> > > > On Jun 3, 9:59 am, Jonno <jo...@[EMAIL PROTECTED]
> wrote:
> > > >> There is no glGetPixel or glSetPixel in OpenGL.
> > > >> Windows API has GetPixel and SetPixel, and these (like all
Windows GDI
> > > >> functions) can draw to anywhere on thescreen, including other
programs'
> > > >> windows. But if you do this, the other programs will overwrite
your
> > > >> pixels the next time they redraw.
>
> > > > I'm not sure even this works any more on Windows Vista.
>
> > > > --
> > > > <\___/>
> > > > / O O \
> > > > \_____/ FTB. Remove my socks for email address.
>
> > > Even if it did (a similar grab can be done in X11) its not quite
what was
> > > asked for.
> > > If anything on thescreenis changing in any way, this snap & replace
> > > approach won't be right.
> > > You'd have to snap & replace at refresh rate to make it "right" --
tough to
> > > do.
>
> > > jbw- Hide quoted text -
>
> > - Show quoted text -
>
> More im****tant question is what you trying to do with this.. it could
> be that
> _this_ question becomes irrelevant if better means are found to do
> what ever it is you are doing.
I want to check all the pixels on screen and detect the pixels with
specific range of RGB next to each other. For example colorblind
people can not see a red text on a green background, now if I find all
the green pixels next to red pixels on screen and draw a line between
them, they can read the text!
So the steps are like this:
1. Capture the screen to an array.
2. Process the captured screen pixel by pixel for that specific range
of RGB.
3. Draw the line by changing RGB values of the array.
4. Show the array of RGB back on screen.
|
