51 lines
2.2 KiB
Plaintext
51 lines
2.2 KiB
Plaintext
/**
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******************************************************************************
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* Xenia : Xbox 360 Emulator Research Project *
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******************************************************************************
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* Copyright 2022 Ben Vanik. All rights reserved. *
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* Released under the BSD license - see LICENSE in the root for more details. *
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******************************************************************************
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*/
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#ifndef XENIA_GPU_SHADERS_EDRAM_XESLI_
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#define XENIA_GPU_SHADERS_EDRAM_XESLI_
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#include "pixel_formats.xesli"
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#define kXenosMsaaSamples_1X 0u
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#define kXenosMsaaSamples_2X 1u
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#define kXenosMsaaSamples_4X 2u
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uint XeEdramOffsetInts(xesl_uint2 pixel_index, uint base_tiles,
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uint pitch_tiles, uint msaa_samples, bool is_depth,
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uint format_ints_log2, uint pixel_sample_index,
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xesl_uint2 resolution_scale) {
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xesl_uint2 rt_sample_index =
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pixel_index <<
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xesl_uint2(xesl_greaterThanEqual(
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msaa_samples.xx,
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xesl_uint2(kXenosMsaaSamples_4X, kXenosMsaaSamples_2X)));
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rt_sample_index += (pixel_sample_index.xx >> xesl_uint2(1u, 0u)) & 1u;
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// For now, while the actual storage of 64bpp render targets in comparison to
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// 32bpp is not known, storing 40x16 64bpp samples per tile for simplicity of
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// addressing in different scenarios.
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xesl_uint2 tile_size_at_32bpp = xesl_uint2(80u, 16u) * resolution_scale;
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xesl_uint2 tile_size_samples =
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tile_size_at_32bpp >> xesl_uint2(format_ints_log2, 0u);
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xesl_uint2 tile_offset_xy = rt_sample_index / tile_size_samples;
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base_tiles += tile_offset_xy.y * pitch_tiles + tile_offset_xy.x;
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rt_sample_index -= tile_offset_xy * tile_size_samples;
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if (is_depth) {
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uint tile_width_half = tile_size_samples.x >> 1u;
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rt_sample_index.x =
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uint(int(rt_sample_index.x) +
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((rt_sample_index.x >= tile_width_half) ? -int(tile_width_half)
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: int(tile_width_half)));
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}
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return base_tiles * (tile_size_at_32bpp.x * tile_size_at_32bpp.y) +
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((rt_sample_index.y * tile_size_samples.x + rt_sample_index.x) <<
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format_ints_log2);
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}
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#endif // XENIA_GPU_SHADERS_EDRAM_XESLI_
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