Is it possible to REALLY disable the alpha-blending WITH a white background?

On 10/16/08 13:40, Martin Hodges wrote:

According to the UPDATE_en text file

 

- If you want to have the old raster OP behavior on black background,

    you can uncheck the "Use alpha blending" box in the "Options/Set/Colors"

    dialog. In that case the alpha value defined for the colors is ignored

    when using a black background, and colors are mixed using an OR

    function.

 

Why only a black background? Why did it work with a white background before.

Mixing colors with raster OPs only works really useful with an OR operation,

which implies a black background. On a white background only an "AND-NOT"

operation can be done, and even that leads to all-black pretty soon.

I have a colour deficiency (like a lot of the male population) and red does

not stand out well from black in the schematic. Switching from one white

screen to a black one is really good for eyestrain. I work on both the sch

and the pcb.

 

What on earth is the point of the alpha-blending in the schematic in any

case. Why would you want to superimpose objects?

All graphics editors in EAGLE use the same drawing engine.

If you don't want to have alpha blending on a white background, you can

set the alpha value of all colors to 255, which will make them fully opaque.

Klaus Schmidinger

--

_______________________________________________________________

Klaus Schmidinger                       Phone: +49-8635-6989-10

CadSoft Computer GmbH                   Fax:   +49-8635-6989-40

Hofmark 2                               Email:   kls@cadsoft.de

D-84568 Pleiskirchen, Germany           URL:     www.cadsoft.de

_______________________________________________________________

Klaus Schmidinger wrote:

On 10/16/08 13:40, Martin Hodges wrote:

According to the UPDATE_en text file

 

- If you want to have the old raster OP behavior on black background,

    you can uncheck the "Use alpha blending" box in the

    "Options/Set/Colors" dialog. In that case the alpha value defined for

    the colors is ignored when using a black background, and colors are

    mixed using an OR function.

 

Why only a black background? Why did it work with a white background

before.

 

Mixing colors with raster OPs only works really useful with an OR

operation, which implies a black background. On a white background only an

"AND-NOT" operation can be done, and even that leads to all-black pretty

soon.

 

I have a colour deficiency (like a lot of the male population) and red

does not stand out well from black in the schematic. Switching from one

white screen to a black one is really good for eyestrain. I work on both

the sch and the pcb.

 

What on earth is the point of the alpha-blending in the schematic in any

case. Why would you want to superimpose objects?

 

All graphics editors in EAGLE use the same drawing engine.

 

If you don't want to have alpha blending on a white background, you can

set the alpha value of all colors to 255, which will make them fully

opaque.

 

Klaus Schmidinger

Thank you for the tip about the palette. It is not very intuitive though.

The different background buttons are not obviously buttons on linux.

One cpu killer for me was the use of a large cursor. Switch to the small

cursor for a hardware accelerated cursor!! Moving the cursor around the

screen used up 50% cpu. I do not know why the performace difference is so

large between v4 and v5 with the large cursor though.

The drawing engine is horribly slow compared to v4. I dread having to use v5

for a project.

I REALLY regret having saved a project in v5. Going back to v4 is no longer

possible.

--

Martin Hodges

Senior design engineer

Network Electronics ASA

Martin Hodges wrote:

Klaus Schmidinger wrote:

 

On 10/16/08 13:40, Martin Hodges wrote:

According to the UPDATE_en text file

 

- If you want to have the old raster OP behavior on black

    background, you can uncheck the "Use alpha blending" box in the

    "Options/Set/Colors" dialog. In that case the alpha value

    defined for the colors is ignored when using a black

    background, and colors are mixed using an OR function.

 

Why only a black background? Why did it work with a white background

before.

 

Mixing colors with raster OPs only works really useful with an OR

operation, which implies a black background. On a white background

only an "AND-NOT" operation can be done, and even that leads to

all-black pretty soon.

 

I have a colour deficiency (like a lot of the male population) and

red does not stand out well from black in the schematic. Switching

from one white screen to a black one is really good for eyestrain.

I work on both the sch and the pcb.

 

What on earth is the point of the alpha-blending in the schematic

in any case. Why would you want to superimpose objects?

 

All graphics editors in EAGLE use the same drawing engine.

 

If you don't want to have alpha blending on a white background, you

can set the alpha value of all colors to 255, which will make them

fully opaque.

 

Klaus Schmidinger

 

Thank you for the tip about the palette. It is not very intuitive

though. The different background buttons are not obviously buttons on

linux.

 

One cpu killer for me was the use of a large cursor. Switch to the

small cursor for a hardware accelerated cursor!! Moving the cursor

around the screen used up 50% cpu. I do not know why the performace

difference is so large between v4 and v5 with the large cursor though.

 

The drawing engine is horribly slow compared to v4. I dread having to

use v5 for a project.

 

I REALLY regret having saved a project in v5. Going back to v4 is no

longer possible.

Martin, to get your project back to v4 -

From Cadsoft website, you can find export-schematic.ulp and

export-board.ulp. Download these and run them on your v5 project to create

script files that you can then use to rebuild your project in v4. You'll

probably find there is some tidying up to do - I had some trouble with

details like text fonts, via drill sizes etc, but it saved a lot of work!

HTH

--

Colin

On 10/16/08 18:33, Martin Hodges wrote:

...

The different background buttons are not obviously buttons on linux.

Which buttons are you referring to?

Can you provide a screenshot?

One cpu killer for me was the use of a large cursor. Switch to the small

cursor for a hardware accelerated cursor!! Moving the cursor around the

screen used up 50% cpu. I do not know why the performace difference is so

large between v4 and v5 with the large cursor though.

In version 4 we could draw the large cursor with the XOR raster OP, directly

to the widget on screen. Version 5 is based on Qt 4, which, unfortunately,

had totally abandoned raster OP capabilities. Therefore we now need to

redraw large parts of the screen widget when drawing the large cursor.

Klaus Schmidinger

--

_______________________________________________________________

Klaus Schmidinger                       Phone: +49-8635-6989-10

CadSoft Computer GmbH                   Fax:   +49-8635-6989-40

Hofmark 2                               Email:   kls@cadsoft.de

D-84568 Pleiskirchen, Germany           URL:     www.cadsoft.de

_______________________________________________________________

Colin wrote:

Martin Hodges wrote:

Klaus Schmidinger wrote:

 

On 10/16/08 13:40, Martin Hodges wrote:

According to the UPDATE_en text file

 

- If you want to have the old raster OP behavior on black

    background, you can uncheck the "Use alpha blending" box in the

    "Options/Set/Colors" dialog. In that case the alpha value

    defined for the colors is ignored when using a black

    background, and colors are mixed using an OR function.

 

Why only a black background? Why did it work with a white background

before.

 

Mixing colors with raster OPs only works really useful with an OR

operation, which implies a black background. On a white background

only an "AND-NOT" operation can be done, and even that leads to

all-black pretty soon.

 

I have a colour deficiency (like a lot of the male population) and

red does not stand out well from black in the schematic. Switching

from one white screen to a black one is really good for eyestrain.

I work on both the sch and the pcb.

 

What on earth is the point of the alpha-blending in the schematic

in any case. Why would you want to superimpose objects?

 

All graphics editors in EAGLE use the same drawing engine.

 

If you don't want to have alpha blending on a white background, you

can set the alpha value of all colors to 255, which will make them

fully opaque.

 

Klaus Schmidinger

 

Thank you for the tip about the palette. It is not very intuitive

though. The different background buttons are not obviously buttons on

linux.

 

One cpu killer for me was the use of a large cursor. Switch to the

small cursor for a hardware accelerated cursor!! Moving the cursor

around the screen used up 50% cpu. I do not know why the performace

difference is so large between v4 and v5 with the large cursor though.

 

The drawing engine is horribly slow compared to v4. I dread having to

use v5 for a project.

 

I REALLY regret having saved a project in v5. Going back to v4 is no

longer possible.

 

Martin, to get your project back to v4 -

From Cadsoft website, you can find export-schematic.ulp and

export-board.ulp. Download these and run them on your v5 project to create

script files that you can then use to rebuild your project in v4. You'll

probably find there is some tidying up to do - I had some trouble with

details like text fonts, via drill sizes etc, but it saved a lot of work!

 

HTH

--

Colin

Thanks for the tip. I think I may be taking that road, at least on the older

machines I use.

Klaus Schmidinger wrote:

On 10/16/08 18:33, Martin Hodges wrote:

...

The different background buttons are not obviously buttons on linux.

 

Which buttons are you referring to?

Can you provide a screenshot?

 

Attached.

One cpu killer for me was the use of a large cursor. Switch to the small

cursor for a hardware accelerated cursor!! Moving the cursor around the

screen used up 50% cpu. I do not know why the performace difference is so

large between v4 and v5 with the large cursor though.

 

In version 4 we could draw the large cursor with the XOR raster OP,

directly to the widget on screen. Version 5 is based on Qt 4, which,

unfortunately, had totally abandoned raster OP capabilities. Therefore we

now need to redraw large parts of the screen widget when drawing the large

cursor.

 

Klaus Schmidinger

That explains a lot.

The world does strange things in the name of progress...

Again, thanks for the follow-up.

M

Attachments:

On 10/19/08 23:38, Martin Hodges wrote:

Klaus Schmidinger wrote:

 

On 10/16/08 18:33, Martin Hodges wrote:

...

The different background buttons are not obviously buttons on linux.

Which buttons are you referring to?

Can you provide a screenshot?

 

 

Attached.

Well, they look like buttons to me.

How do you suggest they should look?

Klaus Schmidinger

--

_______________________________________________________________

Klaus Schmidinger                       Phone: +49-8635-6989-10

CadSoft Computer GmbH                   Fax:   +49-8635-6989-40

Hofmark 2                               Email:   kls@cadsoft.de

D-84568 Pleiskirchen, Germany           URL:     www.cadsoft.de

_______________________________________________________________