Getting Confused on BITMAP and IMAGE functions

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DEvil

16

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Joined: 1st Mar 2008

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Posted: 23rd Mar 2008 13:36

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Hi Community,

At testing the functionality of some graphical Functions
i have written an small Snippet. But it does not what i want!

The first is shown perfectly.

The second only shows an black Box and

The third i have never seen.

A) Why?
B) What is the internal Difference of an Bitmap and an Image?
C) For me an Bitmap is an Image and reverse Order too.
What i can/do not see at this Point?

set window on
set window layout 0,1,1
minimize window
restore window
set window position 0,0
set window size 640,480
set window title "Sprite And Image Testing"
set text font "Lucida Console"
set text size 14
set text transparent
cls
sync rate 0
sync on
sync : sync
randomize timer()

rem THIS RUNS PERFECTLY
load image "images\01.jpg", 1, 1
cls
   for x=1 to 640-1 step 2
      for y=1 to 480-1 step 2
         dot x, y, rgb(64,64,64)
      next y
   next x

print "TEST 1"
   x = rnd (100)
   y = rnd (100)
   paste image 1,   10+x, 10+y
sync
sleep 5000

rem WHY I DON'T SEE THE CONTENT OF MY COPIED AREA? (Only Black Area)
load bitmap "images\iconset.jpg", 1
rem load bitmap "images\iconset.bmp", 1 : rem there is no difference
cls
   print "TEST 2"
   x = rnd (100)
   y = rnd (100)
   print current bitmap()
   set current bitmap 0
   print current bitmap()
rem           bmp1  source-coors   screen      target-coords
   copy bitmap 1,   1, 1, 64, 64,     0,   10+x, 10+y, 74+x, 74+y
   sync
sleep 5000

rem WHY I DON'T SEE THE CONTENT OF MY COPIED AREA FROM BITMAP?
set current bitmap 1
get image 2, 1,1,64,64
cls
   print "TEST 3"
   x = rnd (100)
   y = rnd (100)
   paste image 2,   10+x, 10+y
sync
sleep 5000

end

+ Code Snippet

set window on
set window layout 0,1,1
minimize window
restore window
set window position 0,0
set window size 640,480
set window title "Sprite And Image Testing"
set text font "Lucida Console"
set text size 14
set text transparent
cls
sync rate 0
sync on
sync : sync
randomize timer()

rem THIS RUNS PERFECTLY
load image "images\01.jpg", 1, 1
cls
   for x=1 to 640-1 step 2
      for y=1 to 480-1 step 2
         dot x, y, rgb(64,64,64)
      next y
   next x

   print "TEST 1"
   x = rnd (100)
   y = rnd (100)
   paste image 1,   10+x, 10+y
sync
sleep 5000

rem WHY I DON'T SEE THE CONTENT OF MY COPIED AREA? (Only Black Area)
load bitmap "images\iconset.jpg", 1
rem load bitmap "images\iconset.bmp", 1 : rem there is no difference
cls
   print "TEST 2"
   x = rnd (100)
   y = rnd (100)
   print current bitmap()
   set current bitmap 0
   print current bitmap()
rem           bmp1  source-coors   screen      target-coords
   copy bitmap 1,   1, 1, 64, 64,     0,   10+x, 10+y, 74+x, 74+y
   sync
sleep 5000

rem WHY I DON'T SEE THE CONTENT OF MY COPIED AREA FROM BITMAP?
set current bitmap 1
get image 2, 1,1,64,64
cls
   print "TEST 3"
   x = rnd (100)
   y = rnd (100)
   paste image 2,   10+x, 10+y
sync
sleep 5000

end

____________________________________________________________
I'am Sorry for my (possibly) bad English
Greetings from Germany

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Twinsen

18

Years of Service

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Joined: 20th Jun 2006

Location: Romania

Posted: 23rd Mar 2008 13:48

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as far as the difference between an image and a bitmap, I cannot help u as I myself wonder ... for me, an image is a bitmap and vice versa ... could someone please clarify this? thank u

Could you help me treat my injured Dino-Fly ?

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Twinsen

18

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Joined: 20th Jun 2006

Location: Romania

Posted: 23rd Mar 2008 20:52

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WindowsKiller: if a BITMAP is the video memory buffer screen, if I call SAVE BITMAP, will it save a screenshot of the current view ????

Could you help me treat my injured Dino-Fly ?

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Twinsen

18

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Joined: 20th Jun 2006

Location: Romania

Posted: 23rd Mar 2008 21:37

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ahhh

so do u know a way in which I could make a screenshot in DBPro ???

Could you help me treat my injured Dino-Fly ?

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TDK

Retired Moderator

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Joined: 19th Nov 2002

Location: UK

Posted: 23rd Mar 2008 22:09

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Get Image ImgNum,0,0,Screen Width(),Screen Height()
Save Image "Filename.ext",ImgNum

But, this will not save any sprites unless you have used the Paste Sprite command and/or disabled the sprites Restore Background flag.

The idea of Bitmaps is for either loading unseen images which contain multiple smaller images (which you then grab with Get Image), or for building up screens a bit at a time until they are completed - at which time you can use Get Image - or Copy Bitmap.

TDK_Man

* TDK's Game Programming Forums - Open To All - DB & Team Request Boards *

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Twinsen

18

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Joined: 20th Jun 2006

Location: Romania

Posted: 23rd Mar 2008 22:35

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ahhh cool !!!

so u say that if my sprites are created using the SPRITE command, they will not show up in the capture ??? nasty

Could you help me treat my injured Dino-Fly ?

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BMacZero

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Joined: 30th Dec 2005

Location: E:/ NA / USA

Posted: 24th Mar 2008 05:06

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Yes, the sprites don't actually draw onto Bitmap 0, which is where the image is got from, they just kind of hang out on top of it.

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DEvil

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Joined: 1st Mar 2008

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Posted: 24th Mar 2008 15:24 Edited at: 24th Mar 2008 15:28

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Hello Community,

i am back, now after Analysis

^^
Now i understand DBPro BITMAP-Commands as Commands for an "Virtual Screen"! Screen/Bitmap-Number 0 is always the Real Screen, Screen/Bitmap 1-32 is to understand like Virtual Screens. The Size of Pictures you create or load into this Screens/Bitmaps can be higher than the Resolution of your RealScreen/Desktop/FullScreenMode!

For better understanding how to use and what i mean:
Please download this EXAMPLE-IMAGE you need for the following Snippet,
and place it in the Project Directory (where the exe is compiled)

+ Code Snippet

minimize window
restore window
set window position 0,0
set window size 640,480
set window title "Bitmap/Virtual-Screen Testing"
set text font "Lucida Console"
set text size 14
set text transparent
cls
sync rate 0
sync on
sync

print "PLEASE WAIT WHILE LOADING..."
sync

bitmapnum = 2

load bitmap "example.jpg", bitmapnum
set current bitmap 0

bh = bitmap height(bitmapnum)
bw = bitmap width(bitmapnum)

x = 300
y = 300

repeat
   cls
   text 10, 10, "Use Cursor-Keys to Scroll the Image"
   text 10, 30, "X:" + str$(x)
   text 10, 50, "Y:" + str$(y)

   if upkey()     then dec y,1
   if downkey()   then inc y,1
   if leftkey()   then dec x,1
   if rightkey()  then inc x,1

   if x >= bw-300 then x = bw-301
   if y >= bh-300 then y = bh-301
   if x < 0       then x = 0
   if y < 0       then y = 0

   copy bitmap bitmapnum, x, y, x+300, y+300,   0, 200, 150, 200+300, 150+300
   sync
until escapekey() or spacekey()

wait key
end

KNOWN TRAP DOORS BY USING BITMAP FUNCTIONS:
1 - Load Bitmap "filename.ext", bitnum
Every LOAD BITMAP command changes the CURRENT BITMAP too. This is why you must Restore to the Screen where you want to make some output's (if needed) else the Output is painted on the virtual Screen setted up by LOAD BITMAP, and if also, (maybe) you don't see the Result you want have.

2 - Copy Bitmap s,sx1, sx1, sx2, sy2, d, dx1, dy1, dx2, dy2
If the (S)ource and/or (D)estination Coordinates are out of Area from the Screen and/or Bitmap(Virtual Screen), the Command has the Behavior as it isn't Used, then it is still ignored and doe's nothing! The Result is that (maybe) you don't see the copied area.

____________________________________________________________
I'am Sorry for my (possibly) bad English
Greetings from Germany

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