DRAWRECT using POLYVECTOR from a Image

[spacefractal]

On Android we cant use DRAWRECT and other commands. Its might fails on some devices and this will NOT been fixed at all. Its impossible.

But we can use POLYVECTOR, which works fine on Android. Here is a possible work around:

Code: GLBasic [Select]

GLOBAL IS24BIT=FALSE // FALSE ON ANDROID, TRUE ON OTHER PLATFORMS).

FUNCTION PaintColorRectRGB_START: imageID
        IF IS24BIT=TRUE THEN RETURN
        LOCAL ww, hh
        GETSPRITESIZE imageID, ww, hh
        IF ww=0 THEN RETURN

        STARTPOLY imageID, 2;
ENDFUNCTION

FUNCTION PaintColorRectRGB: x, y, w, h, rr%, gg%, bb%, id=0
        //IF x>ScreenWidth THEN RETURN
        //IF y>ScreenHeight THEN RETURN

        IF IS24BIT=FALSE
                rr=INTEGER(rr/16)
                gg=INTEGER(gg/16)
                bb=INTEGER(bb/16)

                LOCAL xx%=rr*64+gg*4
                LOCAL yy%=bb*4

                IF xx>512
                        xx=xx-512
                        yy=yy+64
                ENDIF
                xx=xx*2+1
                yy=yy*2+1
                IF xx>512
                        xx=xx-512
                        yy=yy+256
                ENDIF
                POLYVECTOR x, y, xx+1, yy
                POLYVECTOR x, y+h, xx+1, yy+1
                POLYVECTOR x+w, y, xx+1, yy
                POLYVECTOR x+w, y+h, xx+1, yy+1
                POLYNEWSTRIP
        ELSE
                DRAWRECT x, y, w, h, RGB(rr, gg, bb)
        ENDIF
ENDFUNCTION

FUNCTION PaintColorRectRGB_END:
        IF IS24BIT=TRUE THEN RETURN
        ENDPOLY
ENDFUNCTION
 

This code can been little bit slower, but better alternative.

This code was used in CatchOut to avoid DRAWRECT on Android, which can fails on some devices and even crash out.

The limit here is you can only use a palette from 4096 colors.

[MrPlow]

Hi Sf,

For PC use is this faster than regular Drawrect or more intensive?

[MrPlow]

tried to use it with loop of drawrects to replace but cant seem to figure out if I am missing something

I run the start part then

Loop
    Run the regular paint image
endloop
Do I need to close it off?

[spacefractal]

You need to start, then draw and then close it'd off. This is how polyester works. You can draw more than one in a batch. However drawrect is faster. This was a safe operation on Android. Hence the ekstra variable for other systems.....

[Kitty Hello]

Another option is to use mem2sprite and do a 1x1 pixel sprite. Use smoothshading false!

[Qedo]

sorry but two things I did not understand:
1) @spacefractal: there is a limit of 4096 colors for android?
2) @Kitty Hello: What do you mean by "option is to use mem2sprite and do a 1x1 pixel sprite" about DRAWRECT?
ciao

[spacefractal]

no android is 16bit color, rgb656. Its just me that wanted to do a 4096 color limit to avoid clutter to many colors on the image. you can do the image bigger with more colors.

Im just used here with 4096, which was nice for CatchOut game, where im used it.

[MrPlow]

Here are my DRAWRECT replacements, is there an ideal way to to DRAWLINE using Polyvector?
I assume DRAWLINE is also broken on Android??

Code: GLBasic [Select]

FUNCTION NewStar: x#,y#,w,h,col
        // polyvector way of doing it:
       STARTPOLY -1
        POLYVECTOR x+(w/2), y, 0,0,col
        POLYVECTOR x, y+(h/2), 0,0,col
        POLYVECTOR x+(w/2), y+h, 0,0,col
        POLYVECTOR x+w, y+(h/2), 0,0,col
                ENDPOLY

ENDFUNCTION

FUNCTION NewRect: x#,y#,w,h,col
        // polyvector way of doing it:
       STARTPOLY -1
        POLYVECTOR x, y, 0,0,col
        POLYVECTOR x, y+h, 0,0,col
        POLYVECTOR x+w, y+h, 0,0,col
        POLYVECTOR x+w, y, 0,0,col
                ENDPOLY


ENDFUNCTION
 

[Slydog]

For a DRAWLINE replacement, I found some old code for drawing a line using POLYVECTORs.
You specify the start and end point, the line thickness, and the line colour.

http://www.glbasic.com/forum/index.php?topic=8796.msg74810#msg74810

[MrPlow]

Thanks for this!

For a DRAWLINE replacement, I found some old code for drawing a line using POLYVECTORs.
You specify the start and end point, the line thickness, and the line colour.

http://www.glbasic.com/forum/index.php?topic=8796.msg74810#msg74810