Bitmaps and DDraw

A surface is the way DirectDraw holds onto a bitmap.

As for execution... I like to do this:

Put all of your tiles onto one large surface, arranged whichever way makes the most sense. Then blit rects from it onto your back buffer.

But how do i add multiple bitmaps to a surface. I can only see CreateSurfaceFromFile and that looks like you are creating a single surface from a single bitmap.

how do u put all your bitmaps onto one surface? also do u use any of the functions in ddutil.h?

Im trying to make a tile engine. I would assume that each "layer" (ie. landscape, objects, etc.) should be a surface my question is if my tiles are 32x32pxs and i want to have a screen that is 640x480 therefore a surface of 20x15 tiles. How create and add multiple tile (ie bitmaps to the main landscape surface?

quote:

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But how do i add multiple bitmaps to a surface. I can only see CreateSurfaceFromFile and that looks like you are creating a single surface from a single bitmap.

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blit to the composite surface just like you would your back buffer!

simple as that really

Or, to point out the obvious - once you understand the correspondance between a 'bitmap' and a 'surface' - you could put together tile 'sets' in your paint package of choice.

That is, put a bunch of tiles onto a single bitmap, load that single bitmap onto a single DDraw surface, then blit off 32x32 (or whatever size you use) rectangles to the backbuffer for displaying, according to the map you're using.

(Edited to correct what could easily be misread as an insult to Lethian)

TheTwistedOne
http://www.angrycake.com

Edited by - TheTwistedOne on July 12, 2000 9:41:29 AM