OldRenderer: What happened?

kermit · **Joined:** Mon May 30, 2011 12:56 am **Posts:** 702

Im testing Cocoa pretty hard now.
One feature I use extensively is the use of a picture to get me points on a line or circle.

I create a picture in white. Set OldRenderer to true
Then draw a line or an oval or similar in black.
Then examine the results pixel by pixel to see where the line or oval was drawn, and use it like a map.

My current code says
if pixel(x,y).blue = 0 then....

trouble is, in Cocoa, even after I set OldRenderer to TRUE, it is immediately set to false
So graphics operations get fuzzy and unsharp.
So if pixel(x,y).blue = 0 doesn't work any more.

This is a major problem for me: cant I have OldRenderer any longer?
I dont want to draw fuzzy lines.. I need exact pixels to make this work.

DaveS · **Posted:** Sat Dec 29, 2012 11:31 am

I believe this as been changed to ANTIALIAS and the value is opposite

g.UseOlderRenderer=TRUE
g.AntiAlias=FALSE

kermit · **Joined:** Mon May 30, 2011 12:56 am **Posts:** 702

Thank God for Dave.
Works!

But .. le sigh...

jranieri · **Joined:** Fri Jan 28, 2011 5:24 pm **Posts:** 145

OldRenderer just means "use QuickDraw instead of Quartz". It's only supported in Carbon applications and will be removed once Carbon support is dropped.

kermit · **Joined:** Mon May 30, 2011 12:56 am **Posts:** 702

But AntiAlias is crossplatform, and works under Quartz and GDI+ and Retina, yes?

Thom McGrath · **Posted:** Sat Dec 29, 2012 1:57 pm

kermit wrote:

Im testing Cocoa pretty hard now.
One feature I use extensively is the use of a picture to get me points on a line or circle.

I create a picture in white. Set OldRenderer to true
Then draw a line or an oval or similar in black.
Then examine the results pixel by pixel to see where the line or oval was drawn, and use it like a map.

My current code says
if pixel(x,y).blue = 0 then....

trouble is, in Cocoa, even after I set OldRenderer to TRUE, it is immediately set to false
So graphics operations get fuzzy and unsharp.
So if pixel(x,y).blue = 0 doesn't work any more.

This is a major problem for me: cant I have OldRenderer any longer?
I dont want to draw fuzzy lines.. I need exact pixels to make this work.

Wouldn't it be faster to use math to find a point on circle?

jranieri · **Joined:** Fri Jan 28, 2011 5:24 pm **Posts:** 145

kermit wrote:

But AntiAlias is crossplatform, and works under Quartz and GDI+ and Retina, yes?

Yes. As far as I know, the AntiAlias property works on all platforms.

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OldRenderer: What happened?