How to load a very large bitmap in DX8 ??
Author
since, old video can only support 256*256 texture size. How can i load the texture which is bigger than 256*256 ?
i tried to use a surface to contain the bmp. but the problem is that i don''t know how to cut the surface into small square and load it as a texture?
if I need to display 640*480 image .. how to do it ?
can anyone provide some tutorial for me ?
thanks all ~~~
you wouldn''t load a 640x480 image because it''s not a texture that is a power of 2. All textures must be a power of two or you''ll slow down your rendering speed alot. other than that you just load it like any other texture, or you can use s3 texture compression.
Author
if i first load the bitmap(640*480) into a surface, then copy some 256*256 Rects from the surface as a texture . And then render all texture at the right position to form the bitmap again, will it work ?
What you should do is write up a class to load a bitmap and split it up into smaller sections. That way with older video cards you would be safe.
- torquel
- torquel
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