Next Power of 2 and textures

eri0o · December 10, 2022, 11:32am

So, I was recently looking into how the sdl2 renderers work, and noticed this NextPower2 function in the PSP renderer

libsdl-org/SDL/blob/5750bcb174300011b91d1de20edb288fcca70f8c/src/render/psp/SDL_render_psp.c#L493

      
        
            PSP_RenderData *data = renderer->driverdata;
            PSP_TextureData *psp_texture = (PSP_TextureData *)SDL_calloc(1, sizeof(*psp_texture));
            
            
if (psp_texture == NULL) {
                return SDL_OutOfMemory();
            }
            
            
psp_texture->swizzled = SDL_FALSE;
            psp_texture->width = texture->w;
            psp_texture->height = texture->h;
            psp_texture->textureHeight = TextureNextPow2(texture->h);
            psp_texture->textureWidth = TextureNextPow2(texture->w);
            psp_texture->format = PixelFormatToPSPFMT(texture->format);
            
            
switch (psp_texture->format) {
            case GU_PSM_5650:
            case GU_PSM_5551:
            case GU_PSM_4444:
                psp_texture->bits = 16;
                break;

Now, I did not find anything similar in the other renderers.

I remember when using Direct3d9 in the past to have to adjust for D3DPTEXTURECAPS_POW2 but I could not tell from the Direct3d9 renderer code any similar adjustment.

Is this something that is not needed anymore?