Simplest drawing snippet for in memory bitmap

Hi Carl,

there must be a example somewhere. I am not able to access a VASmalltalk
environment, abut you should load as much as possible of the
configurationmaps you can find ;-)

There should be an example on clipping,....or also transparency
masks,.... CgDrawable should be the candidate for a first investigation.
You just need a buffer and draw on it,... later you can decide to
flush/clip or do what ever with it.

I will have a look tonight.
Drrawing is dead simple....

Sebastian

Hi Carl,

Is this what you are looking for?

| i |
i := (CgDeviceIndependentImage width: 100 height: 200 depth: 1 palette: (CgIndexedPalette blackAndWhite)).
i putPixel: 0 y: 0 pixelValue: 1.
i inspect.

It is just black/white but you can use other depths and palettes.

Lou

Hey Sebastian,

 

Any help appreciated.  I'm sure it's easy once you know how.  I did try a few things but I would just get one error after another that I would need to work past.  Then I finally realized that I must be going completely down the wrong path.

 

Why should it be hard to create a bitmap (pixmap?) in memory, not associated with a window, and just draw some text or a circle or something else on it?  Should be a half dozen lines of code, right?  The pixmap needed a server, then it needed a screen, and then it needed a display.  Seems overly complicated.  Then after all that and more it still didn't work. 

 

Thanks,

 

-Carl

On Wednesday, February 19, 2014 11:22:49 AM UTC-5, Sebastian Heidbrink wrote:

Hi Carl,

there must be a example somewhere. I am not able to access a VASmalltalk
environment, abut you should load as much as possible of the
configurationmaps you can find ;-)

There should be an example on clipping,....or also transparency
masks,.... CgDrawable should be the candidate for a first investigation.
You just need a buffer and draw on it,... later you can decide to
flush/clip or do what ever with it.

I will have a look tonight.
Drrawing is dead simple....

Sebastian

Hi Carl,

Is this what you are looking for?

| i |
i := (CgDeviceIndependentImage width: 100 height: 200 depth: 1 palette: (CgIndexedPalette blackAndWhite)).
i putPixel: 0 y: 0 pixelValue: 1.
i inspect.

It is just black/white but you can use other depths and palettes.

Lou

On Wednesday, February 19, 2014 1:11:15 PM UTC-5, Carl Gundel wrote:

Hey Sebastian,

 

Any help appreciated.  I'm sure it's easy once you know how.  I did try a few things but I would just get one error after another that I would need to work past.  Then I finally realized that I must be going completely down the wrong path.

 

Why should it be hard to create a bitmap (pixmap?) in memory, not associated with a window, and just draw some text or a circle or something else on it?  Should be a half dozen lines of code, right?  The pixmap needed a server, then it needed a screen, and then it needed a display.  Seems overly complicated.  Then after all that and more it still didn't work. 

 

Thanks,

 

-Carl

On Wednesday, February 19, 2014 11:22:49 AM UTC-5, Sebastian Heidbrink wrote:

Hi Carl,

there must be a example somewhere. I am not able to access a VASmalltalk
environment, abut you should load as much as possible of the
configurationmaps you can find ;-)

There should be an example on clipping,....or also transparency
masks,.... CgDrawable should be the candidate for a first investigation.
You just need a buffer and draw on it,... later you can decide to
flush/clip or do what ever with it.

I will have a look tonight.
Drrawing is dead simple....

Sebastian

Hi Carl,

you should have a look here:
<a onmousedown="this.href='http://www.google.com/url?q\75http%3A%2F%2Fwww.instantiations.com%2Fdocs%2F86%2Fwwhelp%2Fwwhimpl%2Fjs%2Fhtml%2Fwwhelp.htm%23href%3Dpr%2Fstpr238.html\46sa\75D\46sntz\0751\46usg\75AFQjCNF6DTEB7Adulb-KPI_s3rbwxLDH5g';return true;" onclick="this.href='http://www.google.com/url?q\75http%3A%2F%2Fwww.instantiations.com%2Fdocs%2F86%2Fwwhelp%2Fwwhimpl%2Fjs%2Fhtml%2Fwwhelp.htm%23href%3Dpr%2Fstpr238.html\46sa\75D\46sntz\0751\46usg\75AFQjCNF6DTEB7Adulb-KPI_s3rbwxLDH5g';return true;" href="http://www.instantiations.com/docs/86/wwhelp/wwhimpl/js/html/wwhelp.htm#href=pr/stpr238.html" target="_blank">http://www.instantiations.com/docs/86/wwhelp/wwhimpl/js/html/wwhelp.htm#href=pr/stpr238.html

and here:
<a onmousedown="this.href='http://www.google.com/url?q\75http%3A%2F%2Fwww.instantiations.com%2Fdocs%2F86%2Fwwhelp%2Fwwhimpl%2Fjs%2Fhtml%2Fwwhelp.htm%23href%3Dpr%2Fstpr210.html\46sa\75D\46sntz\0751\46usg\75AFQjCNHowg0dZWwaLNoH6KxiOf9faIkv_Q';return true;" onclick="this.href='http://www.google.com/url?q\75http%3A%2F%2Fwww.instantiations.com%2Fdocs%2F86%2Fwwhelp%2Fwwhimpl%2Fjs%2Fhtml%2Fwwhelp.htm%23href%3Dpr%2Fstpr210.html\46sa\75D\46sntz\0751\46usg\75AFQjCNHowg0dZWwaLNoH6KxiOf9faIkv_Q';return true;" href="http://www.instantiations.com/docs/86/wwhelp/wwhimpl/js/html/wwhelp.htm#href=pr/stpr210.html" target="_blank">http://www.instantiations.com/docs/86/wwhelp/wwhimpl/js/html/wwhelp.htm#href=pr/stpr210.html

In the end it is really very strasight forward.
just search the online help for CgDrawable and CgPixmap.

Maybe you want to share what you exactly try to accomplish and I'll have
closer look at it...

Sebastian

Thanks Sebastian,

 

I'll work through those examples.  I'm confused that CgWindow default is referenced.  I don't want to use a window.  I am trying to draw bitmaps, and composite bitmaps together.

 

-Carl

On Thursday, February 20, 2014 12:56:07 AM UTC-5, Sebastian Heidbrink wrote:

Hi Carl,

you should have a look here:
<a href="http://www.instantiations.com/docs/86/wwhelp/wwhimpl/js/html/wwhelp.htm#href=pr/stpr238.html" target="_blank" onmousedown="this.href='http://www.google.com/url?q\75http%3A%2F%2Fwww.instantiations.com%2Fdocs%2F86%2Fwwhelp%2Fwwhimpl%2Fjs%2Fhtml%2Fwwhelp.htm%23href%3Dpr%2Fstpr238.html\46sa\75D\46sntz\0751\46usg\75AFQjCNF6DTEB7Adulb-KPI_s3rbwxLDH5g';return true;" onclick="this.href='http://www.google.com/url?q\75http%3A%2F%2Fwww.instantiations.com%2Fdocs%2F86%2Fwwhelp%2Fwwhimpl%2Fjs%2Fhtml%2Fwwhelp.htm%23href%3Dpr%2Fstpr238.html\46sa\75D\46sntz\0751\46usg\75AFQjCNF6DTEB7Adulb-KPI_s3rbwxLDH5g';return true;">http://www.instantiations.com/docs/86/wwhelp/wwhimpl/js/html/wwhelp.htm#href=pr/stpr238.html

and here:
<a href="http://www.instantiations.com/docs/86/wwhelp/wwhimpl/js/html/wwhelp.htm#href=pr/stpr210.html" target="_blank" onmousedown="this.href='http://www.google.com/url?q\75http%3A%2F%2Fwww.instantiations.com%2Fdocs%2F86%2Fwwhelp%2Fwwhimpl%2Fjs%2Fhtml%2Fwwhelp.htm%23href%3Dpr%2Fstpr210.html\46sa\75D\46sntz\0751\46usg\75AFQjCNHowg0dZWwaLNoH6KxiOf9faIkv_Q';return true;" onclick="this.href='http://www.google.com/url?q\75http%3A%2F%2Fwww.instantiations.com%2Fdocs%2F86%2Fwwhelp%2Fwwhimpl%2Fjs%2Fhtml%2Fwwhelp.htm%23href%3Dpr%2Fstpr210.html\46sa\75D\46sntz\0751\46usg\75AFQjCNHowg0dZWwaLNoH6KxiOf9faIkv_Q';return true;">http://www.instantiations.com/docs/86/wwhelp/wwhimpl/js/html/wwhelp.htm#href=pr/stpr210.html

In the end it is really very strasight forward.
just search the online help for CgDrawable and CgPixmap.

Maybe you want to share what you exactly try to accomplish and I'll have
closer look at it...

Sebastian

Carl, you should read the entire Common Graphics section (<a onmousedown="this.href='http://www.google.com/url?q\75http%3A%2F%2Fwww.instantiations.com%2Fdocs%2F86%2Fwwhelp%2Fwwhimpl%2Fjs%2Fhtml%2Fwwhelp.htm%23href%3Dpr%2Fstpr192.html\46sa\75D\46sntz\0751\46usg\75AFQjCNGwoeEFkjO297orbyPjsHCHE8aD0w';return true;" onclick="this.href='http://www.google.com/url?q\75http%3A%2F%2Fwww.instantiations.com%2Fdocs%2F86%2Fwwhelp%2Fwwhimpl%2Fjs%2Fhtml%2Fwwhelp.htm%23href%3Dpr%2Fstpr192.html\46sa\75D\46sntz\0751\46usg\75AFQjCNGwoeEFkjO297orbyPjsHCHE8aD0w';return true;" href="http://www.instantiations.com/docs/86/wwhelp/wwhimpl/js/html/wwhelp.htm#href=pr/stpr192.html" target="_blank">http://www.instantiations.com/docs/86/wwhelp/wwhimpl/js/html/wwhelp.htm#href=pr/stpr192.html).
It will answer a lot of your questions, excepting perhaps the "Exactly how do I do X?" variety.


On Thursday, February 20, 2014 7:16:47 AM UTC-8, Carl Gundel wrote:

Thanks Sebastian,

 

I'll work through those examples.  I'm confused that CgWindow default is referenced.  I don't want to use a window.  I am trying to draw bitmaps, and composite bitmaps together.

 

-Carl

On Thursday, February 20, 2014 12:56:07 AM UTC-5, Sebastian Heidbrink wrote:

Hi Carl,

you should have a look here:
<a onmousedown="this.href='http://www.google.com/url?q\75http%3A%2F%2Fwww.instantiations.com%2Fdocs%2F86%2Fwwhelp%2Fwwhimpl%2Fjs%2Fhtml%2Fwwhelp.htm%23href%3Dpr%2Fstpr238.html\46sa\75D\46sntz\0751\46usg\75AFQjCNF6DTEB7Adulb-KPI_s3rbwxLDH5g';return true;" onclick="this.href='http://www.google.com/url?q\75http%3A%2F%2Fwww.instantiations.com%2Fdocs%2F86%2Fwwhelp%2Fwwhimpl%2Fjs%2Fhtml%2Fwwhelp.htm%23href%3Dpr%2Fstpr238.html\46sa\75D\46sntz\0751\46usg\75AFQjCNF6DTEB7Adulb-KPI_s3rbwxLDH5g';return true;" href="http://www.instantiations.com/docs/86/wwhelp/wwhimpl/js/html/wwhelp.htm#href=pr/stpr238.html" target="_blank">http://www.instantiations.com/docs/86/wwhelp/wwhimpl/js/html/wwhelp.htm#href=pr/stpr238.html

and here:
<a onmousedown="this.href='http://www.google.com/url?q\75http%3A%2F%2Fwww.instantiations.com%2Fdocs%2F86%2Fwwhelp%2Fwwhimpl%2Fjs%2Fhtml%2Fwwhelp.htm%23href%3Dpr%2Fstpr210.html\46sa\75D\46sntz\0751\46usg\75AFQjCNHowg0dZWwaLNoH6KxiOf9faIkv_Q';return true;" onclick="this.href='http://www.google.com/url?q\75http%3A%2F%2Fwww.instantiations.com%2Fdocs%2F86%2Fwwhelp%2Fwwhimpl%2Fjs%2Fhtml%2Fwwhelp.htm%23href%3Dpr%2Fstpr210.html\46sa\75D\46sntz\0751\46usg\75AFQjCNHowg0dZWwaLNoH6KxiOf9faIkv_Q';return true;" href="http://www.instantiations.com/docs/86/wwhelp/wwhimpl/js/html/wwhelp.htm#href=pr/stpr210.html" target="_blank">http://www.instantiations.com/docs/86/wwhelp/wwhimpl/js/html/wwhelp.htm#href=pr/stpr210.html

In the end it is really very strasight forward.
just search the online help for CgDrawable and CgPixmap.

Maybe you want to share what you exactly try to accomplish and I'll have
closer look at it...

Sebastian

>> I was not able to find that information using the Help menu in VA Smalltalk.

I'm not sure what Help menu you mean. However, since I posted a URL for Instantiations' online documentation, you should click on that link. It will take you to the beginning of the section called "Common Graphics".
<a onmousedown="this.href='http://www.google.com/url?q\75http%3A%2F%2Fwww.instantiations.com%2Fdocs%2F86%2Fwwhelp%2Fwwhimpl%2Fjs%2Fhtml%2Fwwhelp.htm%23href%3Dpr%2Fstpr192.html\46sa\75D\46sntz\0751\46usg\75AFQjCNGwoeEFkjO297orbyPjsHCHE8aD0w';return true;" onclick="this.href='http://www.google.com/url?q\75http%3A%2F%2Fwww.instantiations.com%2Fdocs%2F86%2Fwwhelp%2Fwwhimpl%2Fjs%2Fhtml%2Fwwhelp.htm%23href%3Dpr%2Fstpr192.html\46sa\75D\46sntz\0751\46usg\75AFQjCNGwoeEFkjO297orbyPjsHCHE8aD0w';return true;" href="http://www.instantiations.com/docs/86/wwhelp/wwhimpl/js/html/wwhelp.htm#href=pr/stpr192.html" target="_blank">http://www.instantiations.com/docs/86/wwhelp/wwhimpl/js/html/wwhelp.htm#href=pr/stpr192.html

On Thu, Feb 20, 2014 at 2:46 PM, Carl Gundel <<a onmousedown="this.href='javascript:';return true;" onclick="this.href='javascript:';return true;" href="javascript:" target="_blank" gdf-obfuscated-mailto="PUhyknxe9w8J">basic...@...> wrote:

I was not able to find that information using the Help menu in VA Smalltalk.

 

All I see under Help is:

 

  VA Smalltalk Home Page

  VA Smalltalk Forum

  About VA Smalltalk

 

None of those seems to take me to the documentation you are pointing me to.  Then I tried to find what I could by using Google and by asking here.

 

-Carl

On Thursday, February 20, 2014 1:31:13 PM UTC-5, Richard Sargent wrote:

Carl, you should read the entire Common Graphics section (<a onmousedown="this.href='http://www.google.com/url?q\75http%3A%2F%2Fwww.instantiations.com%2Fdocs%2F86%2Fwwhelp%2Fwwhimpl%2Fjs%2Fhtml%2Fwwhelp.htm%23href%3Dpr%2Fstpr192.html\46sa\75D\46sntz\0751\46usg\75AFQjCNGwoeEFkjO297orbyPjsHCHE8aD0w';return true;" onclick="this.href='http://www.google.com/url?q\75http%3A%2F%2Fwww.instantiations.com%2Fdocs%2F86%2Fwwhelp%2Fwwhimpl%2Fjs%2Fhtml%2Fwwhelp.htm%23href%3Dpr%2Fstpr192.html\46sa\75D\46sntz\0751\46usg\75AFQjCNGwoeEFkjO297orbyPjsHCHE8aD0w';return true;" href="http://www.instantiations.com/docs/86/wwhelp/wwhimpl/js/html/wwhelp.htm#href=pr/stpr192.html" target="_blank">http://www.instantiations.com/docs/86/wwhelp/wwhimpl/js/html/wwhelp.htm#href=pr/stpr192.html).
It will answer a lot of your questions, excepting perhaps the "Exactly how do I do X?" variety.


On Thursday, February 20, 2014 7:16:47 AM UTC-8, Carl Gundel wrote:

Thanks Sebastian,

 

I'll work through those examples.  I'm confused that CgWindow default is referenced.  I don't want to use a window.  I am trying to draw bitmaps, and composite bitmaps together.

 

-Carl

On Thursday, February 20, 2014 12:56:07 AM UTC-5, Sebastian Heidbrink wrote:

Hi Carl,

you should have a look here:
<a onmousedown="this.href='http://www.google.com/url?q\75http%3A%2F%2Fwww.instantiations.com%2Fdocs%2F86%2Fwwhelp%2Fwwhimpl%2Fjs%2Fhtml%2Fwwhelp.htm%23href%3Dpr%2Fstpr238.html\46sa\75D\46sntz\0751\46usg\75AFQjCNF6DTEB7Adulb-KPI_s3rbwxLDH5g';return true;" onclick="this.href='http://www.google.com/url?q\75http%3A%2F%2Fwww.instantiations.com%2Fdocs%2F86%2Fwwhelp%2Fwwhimpl%2Fjs%2Fhtml%2Fwwhelp.htm%23href%3Dpr%2Fstpr238.html\46sa\75D\46sntz\0751\46usg\75AFQjCNF6DTEB7Adulb-KPI_s3rbwxLDH5g';return true;" href="http://www.instantiations.com/docs/86/wwhelp/wwhimpl/js/html/wwhelp.htm#href=pr/stpr238.html" target="_blank">http://www.instantiations.com/docs/86/wwhelp/wwhimpl/js/html/wwhelp.htm#href=pr/stpr238.html

and here:
<a onmousedown="this.href='http://www.google.com/url?q\75http%3A%2F%2Fwww.instantiations.com%2Fdocs%2F86%2Fwwhelp%2Fwwhimpl%2Fjs%2Fhtml%2Fwwhelp.htm%23href%3Dpr%2Fstpr210.html\46sa\75D\46sntz\0751\46usg\75AFQjCNHowg0dZWwaLNoH6KxiOf9faIkv_Q';return true;" onclick="this.href='http://www.google.com/url?q\75http%3A%2F%2Fwww.instantiations.com%2Fdocs%2F86%2Fwwhelp%2Fwwhimpl%2Fjs%2Fhtml%2Fwwhelp.htm%23href%3Dpr%2Fstpr210.html\46sa\75D\46sntz\0751\46usg\75AFQjCNHowg0dZWwaLNoH6KxiOf9faIkv_Q';return true;" href="http://www.instantiations.com/docs/86/wwhelp/wwhimpl/js/html/wwhelp.htm#href=pr/stpr210.html" target="_blank">http://www.instantiations.com/docs/86/wwhelp/wwhimpl/js/html/wwhelp.htm#href=pr/stpr210.html

In the end it is really very strasight forward.
just search the online help for CgDrawable and CgPixmap.

Maybe you want to share what you exactly try to accomplish and I'll have
closer look at it...

Sebastian

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