Re: Bitmap offscreen window larger than 64KB?

Is it possible to use BmpCreate() to create a bitmap larger than 64KB, say 640x480 8bpp, and use it to build an offscreen window for double-buffer paint purpose? Or I have to draw such large dynamic BMP with WinDrawPixel() directly on the screen? BmpCreate can allocate memory chunks 64K

Re: Bitmap offscreen window larger than 64KB?

Actually I just want to create a blank bitmap for double buffer purpose, not from a resource. The pixels are generated programatically. I looked at the Palm API reference and it seems that BmpCreate can create a bitmap larger than 64K. Anybody can verify that? Thanks --- José dos Santos Machado

Re: Bitmap offscreen window larger than 64KB?

I looked at the Palm API reference and it seems that BmpCreate can create a bitmap larger than 64K. Anybody can verify that? yes. simple proof = 320x320 @ 16bpp = 204800 bytes. any OS5 device can do that *g* you say you want a 640x480 buffer - you should probably stick to the size of the

Re: Bitmap offscreen window larger than 64KB?

Nice finding. I also searched the old archives and somebody suggests use BmpCreate to get bitmap memory as malloc, which can be larger than 64KB. All kinds of tricks! --- José dos Santos Machado [EMAIL PROTECTED] wrote: Ben Combee escreveu: Is it possible to use BmpCreate() to create a

Re: Bitmap offscreen window larger than 64KB?

Aaron, that's with you. :) its all about graphics programming primitives. loads of books on the subject, i'd suggest reading some :) Hehehehe... I'll try to make my homework and try to find some of these here in .br :) IMO that's the fascinating side of programming... -- J. Machado -- [EMAIL

Re: Bitmap offscreen window larger than 64KB?

Aaron, that's with you. :) heh.. i actually have code that can smooth scroll any size bitmap (limited to the size of the data storage area, not heap *g*) -- ie: i have had 2048x2048 8bpp image scrolling very smoothly. its all about graphics programming primitives. loads of books on the

Re: Bitmap offscreen window larger than 64KB?

At 12:43 PM 8/13/2003, Khaki Wizard wrote: Hi, all: Is it possible to use BmpCreate() to create a bitmap larger than 64KB, say 640x480 8bpp, and use it to build an offscreen window for double-buffer paint purpose? Yes, BmpCreate can create bitmaps on the dynamic heap larger than 64K. You could

Re: Bitmap offscreen window larger than 64KB?

So what is better? 1. Use BmpCreate to allocate a bitmap 64Kb for double buffer. I think performance is nice, but... 2. Use FtrPtrNew to allocate storage memory, the performance is a problem. Any suggestions? For my app, it is a large bitmap with frequent pixel update (not very

Re: Bitmap offscreen window larger than 64KB?

http://www.cliedeveloper.com/spotlight/kinoma1.html IMHO it's a good tutorial on working with semaphores and blocks larger than 64k... This is NOT good. MemSemphore issues aren't even mentioned in the official Palm-OS sdk. (when I remember right...) Sony should care more about the

Re: Bitmap offscreen window larger than 64KB?

Khaki Wizard escreveu: Hi, all: Is it possible to use BmpCreate() to create a bitmap larger than 64KB, say 640x480 8bpp, and use it to build an offscreen window for double-buffer paint purpose? Actually you cannot create any resource larger than 64kb on PalmOS, unless you do it on the memory

Re: Bitmap offscreen window larger than 64KB?

Ben Combee escreveu: Is it possible to use BmpCreate() to create a bitmap larger than 64KB, say 640x480 8bpp, and use it to build an offscreen window for double-buffer paint purpose? Hey guys, look what I found: http://www.cliedeveloper.com/spotlight/kinoma1.html IMHO it's a good tutorial on

Re: Bitmap offscreen window larger than 64KB?

Carsten escreveu: This is NOT good. MemSemphore issues aren't even mentioned in the official Palm-OS sdk. (when I remember right...) Sony should care more about the things they publish, reading that article sounds like MemSemaphore - used every day, don't care about the consequences ... H...

Re: Bitmap offscreen window larger than 64KB?

Are you using FtrPtrNew to allocate storage memory to store the image data? I'm wondering whether it is efficient enough for fast rendering, if I have frequent update to the bitmap. So what is better? 1. Use BmpCreate to allocate a bitmap 64Kb for double buffer. I think performance is nice,

Bitmap offscreen window larger than 64KB?

Hi, all: Is it possible to use BmpCreate() to create a bitmap larger than 64KB, say 640x480 8bpp, and use it to build an offscreen window for double-buffer paint purpose? Or I have to draw such large dynamic BMP with WinDrawPixel() directly on the screen? Thanks,

Re: Bitmap offscreen window larger than 64KB?

http://www.cliedeveloper.com/spotlight/kinoma1.html IMHO it's a good tutorial on working with semaphores and blocks larger than 64k... This is NOT good. MemSemphore issues aren't even mentioned in the official Palm-OS sdk. (when I remember right...) yes, you do remember right. it

Re: Bitmap offscreen window larger than 64KB?

On Wed, Aug 13, 2003 at 02:10:48PM -0700, Khaki Wizard wrote: Nice finding. I also searched the old archives and somebody suggests use BmpCreate to get bitmap memory as malloc, which can be larger than 64KB. All kinds of tricks! If you're going to rely on that kind of unsupported