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// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "video_core/dirty_flags.h"
#include "video_core/engines/draw_manager.h"
#include "video_core/rasterizer_interface.h"
namespace Tegra::Engines {
DrawManager::DrawManager(Maxwell3D* maxwell3d_) : maxwell3d(maxwell3d_) {}
void DrawManager::ProcessMethodCall(u32 method, u32 argument) {
const auto& regs{maxwell3d->regs};
switch (method) {
case MAXWELL3D_REG_INDEX(clear_surface):
return Clear(1);
case MAXWELL3D_REG_INDEX(draw.begin):
return DrawBegin();
case MAXWELL3D_REG_INDEX(draw.end):
return DrawEnd();
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(argument);
case MAXWELL3D_REG_INDEX(draw_inline_index):
SetInlineIndexBuffer(argument);
break;
case MAXWELL3D_REG_INDEX(inline_index_2x16.even):
SetInlineIndexBuffer(regs.inline_index_2x16.even);
SetInlineIndexBuffer(regs.inline_index_2x16.odd);
break;
case MAXWELL3D_REG_INDEX(inline_index_4x8.index0):
SetInlineIndexBuffer(regs.inline_index_4x8.index0);
SetInlineIndexBuffer(regs.inline_index_4x8.index1);
SetInlineIndexBuffer(regs.inline_index_4x8.index2);
SetInlineIndexBuffer(regs.inline_index_4x8.index3);
break;
default:
break;
}
}
void DrawManager::Clear(u32 layer_count) {
if (maxwell3d->ShouldExecute()) {
maxwell3d->rasterizer->Clear(layer_count);
}
}
void DrawManager::DrawDeferred() {
if (draw_state.draw_mode != DrawMode::Instance || draw_state.instance_count == 0) {
return;
}
DrawEnd(draw_state.instance_count + 1, true);
draw_state.instance_count = 0;
}
void DrawManager::DrawArray(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(false, num_instances);
}
void DrawManager::DrawIndex(PrimitiveTopology topology, u32 index_first, u32 index_count,
u32 base_index, u32 base_instance, u32 num_instances) {
const auto& regs{maxwell3d->regs};
draw_state.topology = topology;
draw_state.index_buffer = 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(true, num_instances);
}
void DrawManager::SetInlineIndexBuffer(u32 index) {
draw_state.inline_index_draw_indexes.push_back(static_cast<u8>(index & 0x000000ff));
draw_state.inline_index_draw_indexes.push_back(static_cast<u8>((index & 0x0000ff00) >> 8));
draw_state.inline_index_draw_indexes.push_back(static_cast<u8>((index & 0x00ff0000) >> 16));
draw_state.inline_index_draw_indexes.push_back(static_cast<u8>((index & 0xff000000) >> 24));
draw_state.draw_mode = DrawMode::InlineIndex;
}
void DrawManager::DrawBegin() {
const auto& regs{maxwell3d->regs};
auto reset_instance_count = regs.draw.instance_id == Maxwell3D::Regs::Draw::InstanceId::First;
auto increment_instance_count =
regs.draw.instance_id == Maxwell3D::Regs::Draw::InstanceId::Subsequent;
if (reset_instance_count) {
DrawDeferred();
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 = regs.draw.topology;
}
void DrawManager::DrawEnd(u32 instance_count, bool force_draw) {
const auto& regs{maxwell3d->regs};
switch (draw_state.draw_mode) {
case DrawMode::Instance:
if (!force_draw) {
break;
}
[[fallthrough]];
case DrawMode::General:
draw_state.base_instance = regs.global_base_instance_index;
draw_state.base_index = regs.global_base_vertex_index;
if (draw_state.draw_indexed) {
draw_state.index_buffer = regs.index_buffer;
ProcessDraw(true, instance_count);
} else {
draw_state.vertex_buffer = regs.vertex_buffer;
ProcessDraw(false, instance_count);
}
draw_state.draw_indexed = false;
break;
case DrawMode::InlineIndex:
draw_state.base_instance = regs.global_base_instance_index;
draw_state.base_index = regs.global_base_vertex_index;
draw_state.index_buffer = regs.index_buffer;
draw_state.index_buffer.count =
static_cast<u32>(draw_state.inline_index_draw_indexes.size() / 4);
draw_state.index_buffer.format = Maxwell3D::Regs::IndexFormat::UnsignedInt;
ProcessDraw(true, instance_count);
draw_state.inline_index_draw_indexes.clear();
break;
}
}
void DrawManager::DrawIndexSmall(u32 argument) {
const auto& regs{maxwell3d->regs};
IndexBufferSmall index_small_params{argument};
draw_state.base_instance = regs.global_base_instance_index;
draw_state.base_index = regs.global_base_vertex_index;
draw_state.index_buffer = 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(true, 1);
}
void DrawManager::UpdateTopology() {
const auto& regs{maxwell3d->regs};
switch (regs.primitive_topology_control) {
case PrimitiveTopologyControl::UseInBeginMethods:
break;
case PrimitiveTopologyControl::UseSeparateState:
switch (regs.topology_override) {
case PrimitiveTopologyOverride::None:
break;
case PrimitiveTopologyOverride::Points:
draw_state.topology = PrimitiveTopology::Points;
break;
case PrimitiveTopologyOverride::Lines:
draw_state.topology = PrimitiveTopology::Lines;
break;
case PrimitiveTopologyOverride::LineStrip:
draw_state.topology = PrimitiveTopology::LineStrip;
break;
default:
draw_state.topology = static_cast<PrimitiveTopology>(regs.topology_override);
break;
}
break;
}
}
void DrawManager::ProcessDraw(bool draw_indexed, u32 instance_count) {
LOG_TRACE(HW_GPU, "called, topology={}, count={}", draw_state.topology.Value(),
draw_indexed ? draw_state.index_buffer.count : draw_state.vertex_buffer.count);
UpdateTopology();
if (maxwell3d->ShouldExecute()) {
maxwell3d->rasterizer->Draw(draw_indexed, instance_count);
}
}
} // namespace Tegra::Engines
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