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author | ReinUsesLisp <reinuseslisp@airmail.cc> | 2020-03-02 22:54:08 +0100 |
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committer | ReinUsesLisp <reinuseslisp@airmail.cc> | 2020-03-13 22:33:04 +0100 |
commit | 3dcaa84ba442ac173c8b5241049296d8fe8a3fd7 (patch) | |
tree | 1ffe5c5bbc7db96743f2dc13a715d17d2fac7593 /src/video_core/shader/transform_feedback.cpp | |
parent | Merge pull request #3473 from ReinUsesLisp/shader-purge (diff) | |
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Diffstat (limited to 'src/video_core/shader/transform_feedback.cpp')
-rw-r--r-- | src/video_core/shader/transform_feedback.cpp | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/src/video_core/shader/transform_feedback.cpp b/src/video_core/shader/transform_feedback.cpp new file mode 100644 index 000000000..db86c940f --- /dev/null +++ b/src/video_core/shader/transform_feedback.cpp @@ -0,0 +1,114 @@ +// Copyright 2020 yuzu Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#include <algorithm> +#include <array> +#include <unordered_map> + +#include "common/assert.h" +#include "common/common_types.h" +#include "video_core/engines/maxwell_3d.h" +#include "video_core/shader/registry.h" +#include "video_core/shader/transform_feedback.h" + +namespace VideoCommon::Shader { + +namespace { + +using Maxwell = Tegra::Engines::Maxwell3D::Regs; + +// TODO(Rodrigo): Change this to constexpr std::unordered_set in C++20 + +/// Attribute offsets that describe a vector +constexpr std::array VECTORS = { + 28, // gl_Position + 32, // Generic 0 + 36, // Generic 1 + 40, // Generic 2 + 44, // Generic 3 + 48, // Generic 4 + 52, // Generic 5 + 56, // Generic 6 + 60, // Generic 7 + 64, // Generic 8 + 68, // Generic 9 + 72, // Generic 10 + 76, // Generic 11 + 80, // Generic 12 + 84, // Generic 13 + 88, // Generic 14 + 92, // Generic 15 + 96, // Generic 16 + 100, // Generic 17 + 104, // Generic 18 + 108, // Generic 19 + 112, // Generic 20 + 116, // Generic 21 + 120, // Generic 22 + 124, // Generic 23 + 128, // Generic 24 + 132, // Generic 25 + 136, // Generic 26 + 140, // Generic 27 + 144, // Generic 28 + 148, // Generic 29 + 152, // Generic 30 + 156, // Generic 31 + 160, // gl_FrontColor + 164, // gl_FrontSecondaryColor + 160, // gl_BackColor + 164, // gl_BackSecondaryColor + 192, // gl_TexCoord[0] + 196, // gl_TexCoord[1] + 200, // gl_TexCoord[2] + 204, // gl_TexCoord[3] + 208, // gl_TexCoord[4] + 212, // gl_TexCoord[5] + 216, // gl_TexCoord[6] + 220, // gl_TexCoord[7] +}; +} // namespace + +std::unordered_map<u8, VaryingTFB> BuildTransformFeedback(const GraphicsInfo& info) { + + std::unordered_map<u8, VaryingTFB> tfb; + + for (std::size_t buffer = 0; buffer < Maxwell::NumTransformFeedbackBuffers; ++buffer) { + const auto& locations = info.tfb_varying_locs[buffer]; + const auto& layout = info.tfb_layouts[buffer]; + const std::size_t varying_count = layout.varying_count; + + std::size_t highest = 0; + + for (std::size_t offset = 0; offset < varying_count; ++offset) { + const std::size_t base_offset = offset; + const u8 location = locations[offset]; + + VaryingTFB varying; + varying.buffer = layout.stream; + varying.offset = offset * sizeof(u32); + varying.components = 1; + + if (std::find(VECTORS.begin(), VECTORS.end(), location / 4 * 4) != VECTORS.end()) { + UNIMPLEMENTED_IF_MSG(location % 4 != 0, "Unaligned TFB"); + + const u8 base_index = location / 4; + while (offset + 1 < varying_count && base_index == locations[offset + 1] / 4) { + ++offset; + ++varying.components; + } + } + + [[maybe_unused]] const bool inserted = tfb.emplace(location, varying).second; + UNIMPLEMENTED_IF_MSG(!inserted, "Varying already stored"); + + highest = std::max(highest, (base_offset + varying.components) * sizeof(u32)); + } + + UNIMPLEMENTED_IF(highest != layout.stride); + } + return tfb; +} + +} // namespace VideoCommon::Shader |