Merge "Sample from texel centers in downchunk shaders" into main

        float maximum = 0.0;

        for (int y = 0; y < 16; y++) {

            for (int x = 0; x < 16; x++) {

                float3 linear = toLinearSrgb(bitmap.eval(xy * 16 + vec2(x, y)).rgb) * hdrSdrRatio;

                float3 linear = toLinearSrgb(bitmap.eval((xy - 0.5) * 16 + 0.5 + vec2(x, y)).rgb) * hdrSdrRatio;

                float maxRGB = max(linear.r, max(linear.g, linear.b));

                maximum = max(maximum, log2(max(maxRGB, 1.0)));

            }

        float maximum = 0.0;

        for (int y = 0; y < 8; y++) {

            for (int x = 0; x < 8; x++) {

                maximum = max(maximum, bitmap.eval(xy * 8 + vec2(x, y)).r);

                maximum = max(maximum, bitmap.eval((xy - 0.5) * 8 + 0.5 + vec2(x, y)).r);

            }

        }

        return float4(float3(maximum), 1.0);