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// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
// SPDX-License-Identifier: GPL-3.0-or-later
// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include <cstring>
#include "common/settings.h"
#include "video_core/dirty_flags.h"
#include "video_core/engines/maxwell_3d.h"
#include "video_core/rasterizer_interface.h"
namespace Tegra::Engines {
void Maxwell3D::DrawManager::ProcessMethodCall(Maxwell3D& maxwell3d, u32 method, u32 argument) {
switch (method) {
case MAXWELL3D_REG_INDEX(clear_surface):
return Clear(maxwell3d, 1);
case MAXWELL3D_REG_INDEX(draw.begin):
return DrawBegin(maxwell3d);
case MAXWELL3D_REG_INDEX(draw.end):
return DrawEnd(maxwell3d);
case MAXWELL3D_REG_INDEX(vertex_buffer.first):
case MAXWELL3D_REG_INDEX(vertex_buffer.count):
case MAXWELL3D_REG_INDEX(index_buffer.first):
break;
case MAXWELL3D_REG_INDEX(index_buffer.count):
draw_state.draw_indexed = true;
break;
case MAXWELL3D_REG_INDEX(index_buffer32_subsequent):
case MAXWELL3D_REG_INDEX(index_buffer16_subsequent):
case MAXWELL3D_REG_INDEX(index_buffer8_subsequent):
draw_state.instance_count++;
[[fallthrough]];
case MAXWELL3D_REG_INDEX(index_buffer32_first):
case MAXWELL3D_REG_INDEX(index_buffer16_first):
case MAXWELL3D_REG_INDEX(index_buffer8_first):
return DrawIndexSmall(maxwell3d, argument);
case MAXWELL3D_REG_INDEX(draw_inline_index):
SetInlineIndexBuffer(maxwell3d, argument);
break;
case MAXWELL3D_REG_INDEX(inline_index_2x16.even):
SetInlineIndexBuffer(maxwell3d, maxwell3d.regs.inline_index_2x16.even);
SetInlineIndexBuffer(maxwell3d, maxwell3d.regs.inline_index_2x16.odd);
break;
case MAXWELL3D_REG_INDEX(inline_index_4x8.index0):
SetInlineIndexBuffer(maxwell3d, maxwell3d.regs.inline_index_4x8.index0);
SetInlineIndexBuffer(maxwell3d, maxwell3d.regs.inline_index_4x8.index1);
SetInlineIndexBuffer(maxwell3d, maxwell3d.regs.inline_index_4x8.index2);
SetInlineIndexBuffer(maxwell3d, maxwell3d.regs.inline_index_4x8.index3);
break;
case MAXWELL3D_REG_INDEX(vertex_array_instance_first):
DrawArrayInstanced(maxwell3d, maxwell3d.regs.vertex_array_instance_first.topology.Value(), maxwell3d.regs.vertex_array_instance_first.start.Value(), maxwell3d.regs.vertex_array_instance_first.count.Value(), false);
break;
case MAXWELL3D_REG_INDEX(vertex_array_instance_subsequent): {
DrawArrayInstanced(maxwell3d, maxwell3d.regs.vertex_array_instance_subsequent.topology.Value(), maxwell3d.regs.vertex_array_instance_subsequent.start.Value(), maxwell3d.regs.vertex_array_instance_subsequent.count.Value(), true);
break;
}
case MAXWELL3D_REG_INDEX(draw_texture.src_y0): {
DrawTexture(maxwell3d);
break;
}
default:
break;
}
}
void Maxwell3D::DrawManager::Clear(Maxwell3D& maxwell3d, u32 layer_count) {
if (maxwell3d.ShouldExecute()) {
maxwell3d.rasterizer->Clear(layer_count);
}
}
void Maxwell3D::DrawManager::DrawDeferred(Maxwell3D& maxwell3d) {
if (draw_state.draw_mode != DrawMode::Instance || draw_state.instance_count == 0) {
return;
}
DrawEnd(maxwell3d, draw_state.instance_count + 1, true);
draw_state.instance_count = 0;
}
void Maxwell3D::DrawManager::DrawArray(Maxwell3D& maxwell3d, Maxwell3D::Regs::PrimitiveTopology topology, u32 vertex_first, u32 vertex_count, u32 base_instance, u32 num_instances) {
draw_state.topology = topology;
draw_state.vertex_buffer.first = vertex_first;
draw_state.vertex_buffer.count = vertex_count;
draw_state.base_instance = base_instance;
ProcessDraw(maxwell3d, false, num_instances);
}
void Maxwell3D::DrawManager::DrawArrayInstanced(Maxwell3D& maxwell3d, Maxwell3D::Regs::PrimitiveTopology topology, u32 vertex_first, u32 vertex_count, bool subsequent) {
draw_state.topology = topology;
draw_state.vertex_buffer.first = vertex_first;
draw_state.vertex_buffer.count = vertex_count;
if (!subsequent) {
draw_state.instance_count = 1;
}
draw_state.base_instance = draw_state.instance_count - 1;
draw_state.draw_mode = DrawMode::Instance;
draw_state.instance_count++;
ProcessDraw(maxwell3d, false, 1);
}
void Maxwell3D::DrawManager::DrawIndex(Maxwell3D& maxwell3d, Maxwell3D::Regs::PrimitiveTopology topology, u32 index_first, u32 index_count, u32 base_index, u32 base_instance, u32 num_instances) {
draw_state.topology = topology;
draw_state.index_buffer = maxwell3d.regs.index_buffer;
draw_state.index_buffer.first = index_first;
draw_state.index_buffer.count = index_count;
draw_state.base_index = base_index;
draw_state.base_instance = base_instance;
ProcessDraw(maxwell3d, true, num_instances);
}
void Maxwell3D::DrawManager::DrawArrayIndirect(Maxwell3D& maxwell3d, Maxwell3D::Regs::PrimitiveTopology topology) {
draw_state.topology = topology;
ProcessDrawIndirect(maxwell3d);
}
void Maxwell3D::DrawManager::DrawIndexedIndirect(Maxwell3D& maxwell3d, Maxwell3D::Regs::PrimitiveTopology topology, u32 index_first, u32 index_count) {
draw_state.topology = topology;
draw_state.index_buffer = maxwell3d.regs.index_buffer;
draw_state.index_buffer.first = index_first;
draw_state.index_buffer.count = index_count;
ProcessDrawIndirect(maxwell3d);
}
void Maxwell3D::DrawManager::SetInlineIndexBuffer(Maxwell3D& maxwell3d, u32 index) {
draw_state.inline_index_draw_indexes.push_back(u8(index & 0x000000ff));
draw_state.inline_index_draw_indexes.push_back(u8((index & 0x0000ff00) >> 8));
draw_state.inline_index_draw_indexes.push_back(u8((index & 0x00ff0000) >> 16));
draw_state.inline_index_draw_indexes.push_back(u8((index & 0xff000000) >> 24));
draw_state.draw_mode = DrawMode::InlineIndex;
}
void Maxwell3D::DrawManager::SetInlineIndexBuffer(Maxwell3D& maxwell3d, u32 method,
const u32* base_start, u32 amount) {
auto& index_buffer = draw_state.inline_index_draw_indexes;
switch (method) {
case MAXWELL3D_REG_INDEX(draw_inline_index): {
const auto* const bytes = reinterpret_cast<const u8*>(base_start);
index_buffer.insert(index_buffer.end(), bytes, bytes + size_t(amount) * sizeof(u32));
break;
}
case MAXWELL3D_REG_INDEX(inline_index_2x16.even): {
const size_t offset = index_buffer.size();
index_buffer.resize(offset + size_t(amount) * 2 * sizeof(u32));
u8* dst = index_buffer.data() + offset;
for (u32 i = 0; i < amount; ++i) {
const u32 word = base_start[i];
const u32 indexes[2]{word & 0xFFFF, word >> 16};
std::memcpy(dst, indexes, sizeof(indexes));
dst += sizeof(indexes);
}
break;
}
case MAXWELL3D_REG_INDEX(inline_index_4x8.index0): {
const size_t offset = index_buffer.size();
index_buffer.resize(offset + size_t(amount) * 4 * sizeof(u32));
u8* dst = index_buffer.data() + offset;
for (u32 i = 0; i < amount; ++i) {
const u32 word = base_start[i];
const u32 indexes[4]{word & 0xFF, (word >> 8) & 0xFF, (word >> 16) & 0xFF,
word >> 24};
std::memcpy(dst, indexes, sizeof(indexes));
dst += sizeof(indexes);
}
break;
}
}
draw_state.draw_mode = DrawMode::InlineIndex;
}
void Maxwell3D::DrawManager::DrawBegin(Maxwell3D& maxwell3d) {
auto reset_instance_count = maxwell3d.regs.draw.instance_id == Maxwell3D::Regs::Draw::InstanceId::First;
auto increment_instance_count = maxwell3d.regs.draw.instance_id == Maxwell3D::Regs::Draw::InstanceId::Subsequent;
if (reset_instance_count) {
DrawDeferred(maxwell3d);
draw_state.instance_count = 0;
draw_state.draw_mode = DrawMode::General;
} else if (increment_instance_count) {
draw_state.instance_count++;
draw_state.draw_mode = DrawMode::Instance;
}
draw_state.topology = maxwell3d.regs.draw.topology;
}
void Maxwell3D::DrawManager::DrawEnd(Maxwell3D& maxwell3d, u32 instance_count, bool force_draw) {
switch (draw_state.draw_mode) {
case DrawMode::Instance:
if (!force_draw) {
break;
}
[[fallthrough]];
case DrawMode::General:
draw_state.base_instance = maxwell3d.regs.global_base_instance_index;
draw_state.base_index = maxwell3d.regs.global_base_vertex_index;
if (draw_state.draw_indexed) {
draw_state.index_buffer = maxwell3d.regs.index_buffer;
ProcessDraw(maxwell3d, true, instance_count);
} else {
draw_state.vertex_buffer = maxwell3d.regs.vertex_buffer;
ProcessDraw(maxwell3d, false, instance_count);
}
draw_state.draw_indexed = false;
break;
case DrawMode::InlineIndex:
draw_state.base_instance = maxwell3d.regs.global_base_instance_index;
draw_state.base_index = maxwell3d.regs.global_base_vertex_index;
draw_state.index_buffer = maxwell3d.regs.index_buffer;
draw_state.index_buffer.count = u32(draw_state.inline_index_draw_indexes.size() / 4);
draw_state.index_buffer.format = Maxwell3D::Regs::IndexFormat::UnsignedInt;
maxwell3d.dirty.flags[VideoCommon::Dirty::IndexBuffer] = true;
ProcessDraw(maxwell3d, true, instance_count);
draw_state.inline_index_draw_indexes.clear();
break;
}
}
void Maxwell3D::DrawManager::DrawIndexSmall(Maxwell3D& maxwell3d, u32 argument) {
Maxwell3D::Regs::IndexBufferSmall index_small_params{argument};
draw_state.base_instance = maxwell3d.regs.global_base_instance_index;
draw_state.base_index = maxwell3d.regs.global_base_vertex_index;
draw_state.index_buffer = maxwell3d.regs.index_buffer;
draw_state.index_buffer.first = index_small_params.first;
draw_state.index_buffer.count = index_small_params.count;
draw_state.topology = index_small_params.topology;
maxwell3d.dirty.flags[VideoCommon::Dirty::IndexBuffer] = true;
ProcessDraw(maxwell3d, true, 1);
}
void Maxwell3D::DrawManager::DrawTexture(Maxwell3D& maxwell3d) {
draw_texture_state.dst_x0 = f32(maxwell3d.regs.draw_texture.dst_x0) / 4096.f;
draw_texture_state.dst_y0 = f32(maxwell3d.regs.draw_texture.dst_y0) / 4096.f;
const auto dst_width = f32(maxwell3d.regs.draw_texture.dst_width) / 4096.f;
const auto dst_height = f32(maxwell3d.regs.draw_texture.dst_height) / 4096.f;
const bool lower_left{maxwell3d.regs.window_origin.mode != Maxwell3D::Regs::WindowOrigin::Mode::UpperLeft};
if (lower_left) {
draw_texture_state.dst_y0 = f32(maxwell3d.regs.surface_clip.height) - draw_texture_state.dst_y0;
}
draw_texture_state.dst_x1 = draw_texture_state.dst_x0 + dst_width;
draw_texture_state.dst_y1 = draw_texture_state.dst_y0 + dst_height;
draw_texture_state.src_x0 = f32(maxwell3d.regs.draw_texture.src_x0) / 4096.f;
draw_texture_state.src_y0 = f32(maxwell3d.regs.draw_texture.src_y0) / 4096.f;
draw_texture_state.src_x1 = (f32(maxwell3d.regs.draw_texture.dx_du) / 4294967296.f) * dst_width + draw_texture_state.src_x0;
draw_texture_state.src_y1 = (f32(maxwell3d.regs.draw_texture.dy_dv) / 4294967296.f) * dst_height + draw_texture_state.src_y0;
draw_texture_state.src_sampler = maxwell3d.regs.draw_texture.src_sampler;
draw_texture_state.src_texture = maxwell3d.regs.draw_texture.src_texture;
maxwell3d.rasterizer->DrawTexture();
}
void Maxwell3D::DrawManager::UpdateTopology(Maxwell3D& maxwell3d) {
switch (maxwell3d.regs.primitive_topology_control) {
case Maxwell3D::Regs::PrimitiveTopologyControl::UseInBeginMethods:
break;
case Maxwell3D::Regs::PrimitiveTopologyControl::UseSeparateState:
switch (maxwell3d.regs.topology_override) {
case Maxwell3D::Regs::PrimitiveTopologyOverride::None:
break;
case Maxwell3D::Regs::PrimitiveTopologyOverride::Points:
draw_state.topology = Maxwell3D::Regs::PrimitiveTopology::Points;
break;
case Maxwell3D::Regs::PrimitiveTopologyOverride::Lines:
draw_state.topology = Maxwell3D::Regs::PrimitiveTopology::Lines;
break;
case Maxwell3D::Regs::PrimitiveTopologyOverride::LineStrip:
draw_state.topology = Maxwell3D::Regs::PrimitiveTopology::LineStrip;
break;
default:
draw_state.topology = Maxwell3D::Regs::PrimitiveTopology(maxwell3d.regs.topology_override);
break;
}
break;
}
}
void Maxwell3D::DrawManager::ProcessDraw(Maxwell3D& maxwell3d, bool draw_indexed, u32 instance_count) {
LOG_TRACE(HW_GPU, "called, topology={}, count={}", draw_state.topology, draw_indexed ? draw_state.index_buffer.count : draw_state.vertex_buffer.count);
UpdateTopology(maxwell3d);
if (maxwell3d.ShouldExecute()) {
maxwell3d.rasterizer->Draw(draw_indexed, instance_count);
}
}
void Maxwell3D::DrawManager::ProcessDrawIndirect(Maxwell3D& maxwell3d) {
LOG_TRACE(HW_GPU, "called, topology={}, is_indexed={}, includes_count={}, buffer_size={}, max_draw_count={}", draw_state.topology, indirect_state.is_indexed, indirect_state.include_count, indirect_state.buffer_size, indirect_state.max_draw_counts);
UpdateTopology(maxwell3d);
if (maxwell3d.ShouldExecute()) {
maxwell3d.rasterizer->DrawIndirect();
}
}
} // namespace Tegra::Engines
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