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Today's Topics:

1. Q: How to apply transparent gradient to image? (D. R. Evans) 2. Re: Q: How to apply transparent gradient to image? (Rolf Steinort) 3. Re: Q: How to apply transparent gradient to image? (Akkana Peck) 4. How to open image in existing gimp instance (Tanveer Singh) 5. Re: How to open image in existing gimp instance (Michael Beckwith) 6. Re: How to open image in existing gimp instance (Tanveer Singh) 7. Re: How to open image in existing gimp instance (Sven Neumann) 8. Re: How to open image in existing gimp instance (Tanveer Singh)

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Message: 1 Date: Mon, 24 Mar 2008 15:33:33 -0600 From: "D. R. Evans"
Subject: [Gimp-user] Q: How to apply transparent gradient to image? To: gimp-user@lists.XCF.Berkeley.EDU Message-ID:
Content-Type: text/plain; charset=UTF-8

I have a simple PNG image, and I'd like to change the top half so that at the very top the image is completely transparent, with the opacity increasing linearly so that halfway down the image (and all the way to the bottom) the image has 100% opacity.

I've messed with layers and gradients until I want to scream -- I can't find the trick that allows me to do this. (It seems like it should be dead easy.)

Could someone please point me toward something that describes how to do this?

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Message: 2 Date: Mon, 24 Mar 2008 22:57:52 +0100 From: Rolf Steinort
Subject: Re: [Gimp-user] Q: How to apply transparent gradient to image?
To: "D. R. Evans"
Cc: gimp-user@lists.XCF.Berkeley.EDU Message-ID:
Content-Type: text/plain

On Mon, 2008-03-24 at 15:33 -0600, D. R. Evans wrote:

I have a simple PNG image, and I'd like to change the top half so that at the very top the image is completely transparent, with the opacity increasing linearly so that halfway down the image (and all the way to the bottom) the image has 100% opacity.

I've messed with layers and gradients until I want to scream -- I can't find the trick that allows me to do this. (It seems like it should be dead easy.)

Could someone please point me toward something that describes how to do this?

- If your base layer name is printed in BOLD in the layer dialogue, right click on it and "add an alpha channel".

- again right click on the layer and add an layer mask, filled with white.

- take the gradient tool with a gradient from black to white.

- apply the gradient to the layer mask (just paint into the image if the frame around the layer mask is white) Start where you want to have 100% opacity and end where you want 0%.

Rolf

http://meetthegimp.org - weekly video podcast about GIMP and photography

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Message: 3 Date: Mon, 24 Mar 2008 14:54:57 -0700 From: Akkana Peck
Subject: Re: [Gimp-user] Q: How to apply transparent gradient to image?
To: gimp-user@lists.XCF.Berkeley.EDU Message-ID:
Content-Type: text/plain; charset=us-ascii

D. R. Evans writes:

I have a simple PNG image, and I'd like to change the top half so that at the very top the image is completely transparent, with the opacity increasing linearly so that halfway down the image (and all the way to the bottom) the image has 100% opacity.

I've messed with layers and gradients until I want to scream -- I can't find the trick that allows me to do this. (It seems like it should be dead easy.)

Could someone please point me toward something that describes how to do this?

- Make a layer mask (Layer->Mask->Add Layer Mask..., or you can use the context menu in the Layers dialog). Let it default to White (full opacity).

- Click on the gradient (blend) tool in the Toolbox. Make sure your fg/bg colors are Black and White (the defaults) and that the gradient is FG to BG (the default).

- In the image window, hold the Ctrl key down, then mouse down anywhere along the very top of the image, and drag straight down (the Ctrl key will make it easy to stay exactly vertical) to the middle of the image, then release the mouse button.

You're basically done (it should be transparent just as you described), but you'll probably want one more step:

- In the Layers dialog, click on the tiny preview that shows your image, to make sure that it and not the layer mask next to it is active. You want the image preview to be outlined in white, and the mask preview to be outlined in black, not vice versa. (This saves you from getting "You are about to save a layer mask" errors when you save.)

If you save it as anything but .xcf, you'll probably get warnings about how layer masks aren't preserved, but don't worry about those. If you don't want to see them you can Flatten before you save.

...Akkana

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Message: 4 Date: Tue, 25 Mar 2008 10:51:52 +0530 From: "Tanveer Singh"
Subject: [Gimp-user] How to open image in existing gimp instance To: gimp-user@lists.xcf.berkeley.edu Message-ID:

Content-Type: text/plain; charset=ISO-8859-1

Hi, I am using GIMP 2.4 on windows XP.
My workflow is like this
I open up the file browser, right click on image, and open with gimp. then I edit save and close the image window, leaving gimp running then I do the same for the next image(right click->open with gimp) the problem is that it starts a new instance of gimp. I don't want that. I want the same instance of gimp. How to do that? Is there a gimp option on the command line which allows you to open the image in currently running gimp? regards
Tanveer

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Message: 5 Date: Tue, 25 Mar 2008 00:39:47 -0500 From: Michael Beckwith
Subject: Re: [Gimp-user] How to open image in existing gimp instance To: gimp-user@lists.XCF.Berkeley.EDU Message-ID:
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Try dragging the image onto the tool area in gimp.

Tanveer Singh wrote:

Hi,
I am using GIMP 2.4 on windows XP.
My workflow is like this
I open up the file browser, right click on image, and open with gimp. then I edit save and close the image window, leaving gimp running then I do the same for the next image(right click->open with gimp) the problem is that it starts a new instance of gimp. I don't want that. I want the same instance of gimp. How to do that? Is there a gimp option on the command line which allows you to open the image in currently running gimp? regards
Tanveer