dave@aquarium.buffalo.ny.us (David R. Tyler) (01/05/91)
Hello all!
I have been playing around with creating/drawing images...
and had very few problems... (GRR!)
but, when i changed to a CUSTOMSCREEN (it was on the WBSCREEN)
with 3 planes (8 colours), i get garbage when i attempt to
drawimage into the last color (color 7)...
wondering if perhaps there is a hidden bug in the os (or something)
having to do with plotting an image into the last plane of a
window (and having more data to go...?), i added another plane,
now i have 4. This fixed the garbage problem but...
when i draw 7 of these images in a row accross my screen,
(white, green, yellow, blue, grey, brown, BLUE)
the last blue SHOULD BE RED. THE Color is set to red (15)...
does anyone have ANY IDEA WHY this happens? i really want to use
that color in my program!!!!
here is a snippet of the code:
---------------------------------------------------------------------------
here.PlanePick=7;
DrawImage(Rport,&hex,200,190);
---------------------------------------------------------------------------
hex is the associated image structure:
struct Image hex =
{
0,0 - leftedge, topedge
32,9,2 - width, height, depth
HEXA,7,0, - ImageData, PlanePick, PlaneOnOff
NULL - NextImage
};
HEXA is of type USHORT, and is in CHIP..
--------------------------------------------------------------------------
my image data is enough for 2 planes, but when i change depth to 1, and
remove the data for the second plane (it was only a dup of the first
plane) i get garbage spread through the 7 images, and the colors are
an alternating series of the first 2 colors (white & green).
i am completely baffled.
does anyone know why it would be blue (as opposed to another color)
which is color 4 in my pallete?
i look forward to SOMEONE having a clue as to why this is happening..
if anyone wants to see the code, the file(s) are short, and i could forward
copies in mail... (*wistful sigh*) thanks....
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__\/_______________________|____________________________________________|_|forgeas@swinjm.UUCP (Jean-Michel Forgeas) (01/06/91)
In article <18789829.ARN020d@aquarium.buffalo.ny.us>, David R. Tyler writes: > Hello all! > [...] > but, when i changed to a CUSTOMSCREEN (it was on the WBSCREEN) > with 3 planes (8 colours), i get garbage when i attempt to > drawimage into the last color (color 7)... Are you sure your PlanePick value does represent the exact number of planes stored in your image data ? > struct Image hex = > { > 0,0 - leftedge, topedge > 32,9,2 - width, height, depth > HEXA,7,0, - ImageData, PlanePick, PlaneOnOff > NULL - NextImage > }; Your PlanePick value of 7 (00000111) means that HEXA has 3 planes... > my image data is enough for 2 planes, but when i change depth to 1, and ...but HEXA has only 2 planes. So the third plane to be drawn is the memory following the second plane. Who knows what it is ? This can be one of your problems, but I think you have others and I need a piece of your code to understand more. -- \___/ Jean-Michel Forgeas \-/ cbmvax!cbmehq!cbmfra!swinjm!forgeas | The Software Winery -^- And, where is the universe ?
peterk@cbmger.UUCP (Peter Kittel GERMANY) (01/07/91)
In article <18789829.ARN020d@aquarium.buffalo.ny.us> dave@aquarium.buffalo.ny.us writes: > but, when i changed to a CUSTOMSCREEN (it was on the WBSCREEN) > with 3 planes (8 colours), i get garbage when i attempt to > drawimage into the last color (color 7)... ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ The value 7 for planepick doesn't mean that you draw "into color 7", but that you draw into bitplanes 1 to 3. The value 7 is the three lowest bits set, and each bit stands for one bitplane. If you only have data for two bitplanes (as your depth parameter says), then indeed garbage will occur for the third plane. To check this out, try to set planepick to 3, which will limit the planes to 2. -- Best regards, Dr. Peter Kittel // E-Mail to \\ Only my personal opinions... Commodore Frankfurt, Germany \X/ {uunet|pyramid|rutgers}!cbmvax!cbmger!peterk