how to resize a bitmap image

how to resize a bitmap image

raja peter

Member #7,835

October 2006

I have loaded a image(gif, jpg,..) of Dimension 800*600 into a bitmap. I want to resize the image into the dimension 500*400.

Thanks.

luv,

raja

Frank Drebin

Member #2,987

December 2002

stretch_blit and stretch_sprite ?

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FMC

Member #4,431

March 2004

to resize it you must create a new bitmap of the appropriate size:

BITMAP *a,*b;
a = load_bitmap("jj.bmp",NULL);
b = create_bitmap(500,400);
stretch_blit(a, b, 0, 0, a->w, a->h, 0, 0, b->w, dest_b->h);
destroy_bitmap(a); //free the memory, you can use b from now on

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raja peter

Member #7,835

October 2006

I think these functions will display the resized image on the destination image.

Will it store it in the destination image.

I want to make it clear.

I have a bitmap of size 800* 600 and want the same image reduced to 500*400. Then I'll use the resulted image further more.

Thanks FMC U cleared it.

luv,

raja

TeamTerradactyl

Member #7,733

September 2006

FMC's suggestion will store it in the destination image. It creates a new image, stretches your current image and saves that result in the 500x400 bitmap, so you have your full-sized image and your new smaller image in two separate memory locations.

Erkle

Member #3,493

May 2003

Display and store, in this case, mean the same thing. You cannot display an image without storing it. Even blitting to the screen results in the bitmap being stored in the primary video bitmap.

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julian boolean

Member #7,941

November 2006

How baddly does stretching distort the bitmap?

raja peter

Member #7,835

October 2006

Thanks one and all.

I could make a fine stretching.

luv,

raja