Hi, Allegro help

[speedlemon]

I read aetherfox's tutorial on the allegro game programming library.. i simply found it very useful. well, i read that entire thing, but i wish there was more stuff like that. i downloaded a lot of allegro manuals/tutorials for c++. however, since im not that good at c++ or even something more like a c, i was wondering if any of you knew another tutorial, or i was wondering if it would be against the rules to just use this thread to ask questions on specific c++ code/just general things about allegro that i dont understand. instead of making a new thread each time.

heres the first question-
how can i possible load graphics?
heres is what i tried but i got an error?
oh and also, this isnt the entire program, this is just the part giving me problems.

Code:

dim shared TestPalette as Palette
generate_332_palette(TestPalette)

sorry if thats not even close to what its supposed to be, but its the best i could make out of the c++

[red_Marvin]

loading bitmaps should be something like:
[syntax="qbasic"]dim mybitmap as bitmap ptr
dim pal as palette
mybitmap=load_bitmap("filename", @pal)
if mybitmap = 0 then
'Something went wrong
else
'Good Goood (Pet evil cat and laugh manically)
end if
destroy_bitmap mybitmap[/syntax]
^Untested

generate_332_palette is a void function and should thus be called as
a sub = omit the parentheses...

[speedlemon]

thank you red_Marvin for answering my question here. I will test that later for sure now.

[speedlemon]

[syntax="php"]#include "allegro.bi"
OPTION EXPLICIT

dim shared smilepic as bitmap ptr
dim shared apalette as palette
dim shared x,y


DIM SHARED DBLBuffer AS BITMAP PTR
DIM SHARED Game_State AS SINGLE
DIM SHARED White AS INTEGER

DECLARE SUB InitAllegro(SWidth = 640, SHeight = 480, CDepth = 16, Fullscreen = 0, WTitle AS STRING = "Allegro + freeBasic")
DECLARE SUB CloseAllegro()
DECLARE SUB InitGame()
DECLARE SUB Game()
DECLARE SUB EndGame()

InitAllegro ()
InitGame()

Clear_Bitmap SCREEN
Clear_Bitmap DBLBuffer
Clear_KeyBuf

DO
Acquire_Bitmap(DBLBuffer)
Game()
Release_Bitmap(DBLBuffer)
VSYNC
Blit DBLBuffer, SCREEN, 0, 0, 0, 0, SCREEN_W, SCREEN_H
Clear_Bitmap DBLBuffer
IF Key(KEY_ESC) THEN Game_State = 1
LOOP UNTIL Game_State = 1

EndGame()
CloseAllegro()

SUB InitAllegro(SWidth = 640, SHeight = 480, CDepth = 16, Fullscreen = 0, WTitle AS STRING = "Allegro + freeBasic")
Allegro_Init
Install_Keyboard
Install_Timer
Install_Mouse
Set_Color_Depth CDepth
IF Fullscreen = 0 THEN
IF Set_GFX_Mode(GFX_AUTODETECT_WINDOWED, SWidth, SHeight, 0, 0) < 0 THEN
Allegro_Message "Unable to set any graphic mode" + Chr(13) + Allegro_Error + Chr(13)
END 1
END IF
END IF
IF Fullscreen = 1 THEN
IF Set_GFX_Mode(GFX_AUTODETECT_FULLSCREEN, SWidth, SHeight, 0, 0) < 0 THEN
Allegro_Message "Unable to set any graphic mode" + Chr(13) + Allegro_Error + Chr(13)
END 1
END IF
END IF
Set_Window_Title WTitle
DBLBuffer = Create_Bitmap (SCREEN_W, SCREEN_H)
IF DBLBuffer = NULL THEN
Allegro_Exit
Allegro_Message "Not enough memory."
END 1
END IF
Text_Mode(-1)
Game_State = 0
White = MakeCol(255,255,255)
END SUB


SUB CloseAllegro()
Destroy_Bitmap DBLBuffer
Remove_Keyboard
Remove_Timer
Remove_Mouse
Allegro_Exit
END 0
END SUB


SUB InitGame()

smilepic = load_bmp("Smile.bmp",@apalette)

END SUB

SUB Game()
floodfill dblbuffer,100,100,white
blit smilepic,dblbuffer,0,0,x,y,145,138
x=x+5
y=y+3
END SUB

SUB EndGame()
destroy_bitmap(smilepic)
END SUB

[/syntax]
alright, this is the entire program.
right now, this works. but its throwing an error. im not really sure why?

and i have another question. i have help file for allegro, and it tells me some stuff but its all in c++. but i used it to find out some stuff. but i would like to be able to do transparent stuff. but the only transparent stuff i can find in the manual is like this,

draw_trans_sprite(bitmap, sprite, x, y)

something like that
but i dont know how to make a sprite to do that.
but i think it might have to do with palette or something like truecolor mode is. unfortuanlately, i dont know what either one of those means. :oops:

[speedlemon]

ok. by now i figured out how to do my last question. however, rotation's giving me a problem. there's no errors, its just not rotating. this is what the code is, and you can see the entire program if you download it.

Code:

rotate_sprite dblbuffer, smilepic, 100, 100, 64

according to my manual, 64 should be 90 degree turn.

next problem;
im not really sure why. and when it loads the graphic, its throwing a warning(u can see this when you download and test for yourself). id post the code, but its pretty much the same as last one except this time it is for rotating. instead, ill just post the zip file, so you can check it out for yourself. please help!

http://www.ezupload.org/?w=download&id=8054&name=RP.ZIP (don't right click and attempt to save target :wink: )