From 3dcaa84ba442ac173c8b5241049296d8fe8a3fd7 Mon Sep 17 00:00:00 2001 From: ReinUsesLisp Date: Mon, 2 Mar 2020 18:54:08 -0300 Subject: [PATCH] shader/transform_feedback: Add host API friendly TFB builder --- CMakeModules/GenerateSCMRev.cmake | 2 + src/common/CMakeLists.txt | 2 + src/video_core/CMakeLists.txt | 2 + src/video_core/shader/transform_feedback.cpp | 114 +++++++++++++++++++ src/video_core/shader/transform_feedback.h | 22 ++++ 5 files changed, 142 insertions(+) create mode 100644 src/video_core/shader/transform_feedback.cpp create mode 100644 src/video_core/shader/transform_feedback.h diff --git a/CMakeModules/GenerateSCMRev.cmake b/CMakeModules/GenerateSCMRev.cmake index 8c13a94fb4..83e4e9df2e 100644 --- a/CMakeModules/GenerateSCMRev.cmake +++ b/CMakeModules/GenerateSCMRev.cmake @@ -102,6 +102,8 @@ set(HASH_FILES "${VIDEO_CORE}/shader/shader_ir.cpp" "${VIDEO_CORE}/shader/shader_ir.h" "${VIDEO_CORE}/shader/track.cpp" + "${VIDEO_CORE}/shader/transform_feedback.cpp" + "${VIDEO_CORE}/shader/transform_feedback.h" ) set(COMBINED "") foreach (F IN LISTS HASH_FILES) diff --git a/src/common/CMakeLists.txt b/src/common/CMakeLists.txt index 1f621fb1fb..fbebed7159 100644 --- a/src/common/CMakeLists.txt +++ b/src/common/CMakeLists.txt @@ -83,6 +83,8 @@ add_custom_command(OUTPUT scm_rev.cpp "${VIDEO_CORE}/shader/shader_ir.cpp" "${VIDEO_CORE}/shader/shader_ir.h" "${VIDEO_CORE}/shader/track.cpp" + "${VIDEO_CORE}/shader/transform_feedback.cpp" + "${VIDEO_CORE}/shader/transform_feedback.h" # and also check that the scm_rev files haven't changed "${CMAKE_CURRENT_SOURCE_DIR}/scm_rev.cpp.in" "${CMAKE_CURRENT_SOURCE_DIR}/scm_rev.h" diff --git a/src/video_core/CMakeLists.txt b/src/video_core/CMakeLists.txt index 0101e5f0e1..91df062d7c 100644 --- a/src/video_core/CMakeLists.txt +++ b/src/video_core/CMakeLists.txt @@ -129,6 +129,8 @@ add_library(video_core STATIC shader/shader_ir.cpp shader/shader_ir.h shader/track.cpp + shader/transform_feedback.cpp + shader/transform_feedback.h surface.cpp surface.h texture_cache/format_lookup_table.cpp diff --git a/src/video_core/shader/transform_feedback.cpp b/src/video_core/shader/transform_feedback.cpp new file mode 100644 index 0000000000..db86c940f6 --- /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 +#include +#include + +#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 BuildTransformFeedback(const GraphicsInfo& info) { + + std::unordered_map 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 diff --git a/src/video_core/shader/transform_feedback.h b/src/video_core/shader/transform_feedback.h new file mode 100644 index 0000000000..8a8235019a --- /dev/null +++ b/src/video_core/shader/transform_feedback.h @@ -0,0 +1,22 @@ +// Copyright 2020 yuzu Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#pragma once + +#include + +#include "common/common_types.h" +#include "video_core/shader/registry.h" + +namespace VideoCommon::Shader { + +struct VaryingTFB { + std::size_t buffer; + std::size_t offset; + std::size_t components; +}; + +std::unordered_map BuildTransformFeedback(const GraphicsInfo& info); + +} // namespace VideoCommon::Shader