Changing palette colors leads to different render coordinates.

SDL Development
1

I think this may already be addressed in SDL 3.4.0, since you added a new SDL_SCALEMODE_PIXELART. When I change the palette of a pixel art surface that I convert to a texture, in this case a font with an opaque background, based on the colors both the top y and bottom y coordinate of the tiles rendered will change by one pixel. The x coordinates don’t change at all. I think this probably has to do with how SDL_SCALEMODE_NEAREST works. I have my renderer set to 320 by 320 pixels with integer scaling.

Here’s a sample of the function used to render the font, in case my code is the problem:

void testprint( const char *teststring, float printx, float printy )
{
    int charcount = 0;
    srcrect.x = 0;
    srcrect.y = 0;
    srcrect.w = 10;
    srcrect.h = 20;
    dstrect.x = printx;
    dstrect.y = printy;
    dstrect.w = 10;
    dstrect.h = 20;
    while ( teststring[charcount] != 0 )
    {
        srcrect.x = SDL_truncf(teststring[charcount] % 16 * 10);
        srcrect.y = SDL_truncf(teststring[charcount] / 16 * 20 - 40);
        dstrect.x = SDL_truncf(printx + charcount * 10);
        SDL_RenderTexture( renderer, jfontt, &srcrect, &dstrect );
        charcount++;
    }
}
2

Here are some screenshots of the problem for you.

test
test1920×3240 149 KB

3

What should we look for in the screenshots? As far as I can see, all three texts are at the same distance from the top of the window.