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rsx: Improve unnormalized coordinate sampling

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- Improve rounding when sampling nearest neighbour. This is mostly a problem with NVIDIA
- Implement unnormalized 3D sampling
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kd-11 2021-07-31 17:27:16 +03:00 • committed by kd-11
parent b3c65b7bca
commit 99b6963fab
9 changed files with 74 additions and 55 deletions
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15
rpcs3/Emu/RSX/RSXThread.cpp
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@ -1878,8 +1878,10 @@ namespace rsx
auto &tex = rsx::method_registers.fragment_textures[i];
if (tex.enabled())
{
current_fragment_program.texture_params[i].scale_x = sampler_descriptors[i]->scale_x;
current_fragment_program.texture_params[i].scale_y = sampler_descriptors[i]->scale_y;
current_fragment_program.texture_params[i].scale[0] = sampler_descriptors[i]->scale_x;
current_fragment_program.texture_params[i].scale[1] = sampler_descriptors[i]->scale_y;
current_fragment_program.texture_params[i].scale[2] = sampler_descriptors[i]->scale_z;
current_fragment_program.texture_params[i].subpixel_bias = 0.f;
current_fragment_program.texture_params[i].remap = tex.remap();
m_graphics_state |= rsx::pipeline_state::fragment_texture_state_dirty;
@ -1899,8 +1901,17 @@ namespace rsx
const u32 format = raw_format & ~(CELL_GCM_TEXTURE_LN | CELL_GCM_TEXTURE_UN);
if (raw_format & CELL_GCM_TEXTURE_UN)
{
current_fp_texture_state.unnormalized_coords |= (1 << i);
if (tex.min_filter() == rsx::texture_minify_filter::nearest ||
tex.mag_filter() == rsx::texture_magnify_filter::nearest)
{
// Subpixel offset so that (X + bias) * scale will round correctly
current_fragment_program.texture_params[i].subpixel_bias = 0.5f;
}
}
if (sampler_descriptors[i]->format_class != RSX_FORMAT_CLASS_COLOR)
{
switch (sampler_descriptors[i]->format_class)