forums.ps2dev.org

[Garak]

Greetings,

Small images do not seem to load correctly in SDL. When I load an image with a width of less then 35 pixels or so, the image gets drawn to the screen incorrectly, almost like the pixel data is off by a little bit. From what I an tell, the width and height both need to be a minimum of somewhere around 48 x 300 or so. I also noticed a weird effect where if the height is not big enough, I cannot use an SDL color key to make a transparent background for an image. The image will draw to the screen, but it does not have a transparent background, the transparent color is drawn as well.

Here are some rough numbers I have noticed:

Width <= 35, height anything – Image is drawn incorrectly, as if pixels are off. I print image height and width to screen, and SDL surface has correct values

Width >= 48, height <= 300 – Image draws to screen correctly, but transparent background color is ignored.

I have tried using SDL_Image to load the same files in a PNG format, but the same problem occurs. Any ideas as to what could be causing this problem?

Garak

[rinco]

I reckon the problem lies in the hwaccelerated blitting... non-screen hwsurface blits use this: