Shader: Define a common interface for running vertex shader programs.
bunnei
parent
18527b9e21
commit
3f69c2039d
@ -0,0 +1,105 @@
|
||||
// Copyright 2015 Citra Emulator Project
|
||||
// Licensed under GPLv2 or any later version
|
||||
// Refer to the license.txt file included.
|
||||
|
||||
#include "common/logging/log.h"
|
||||
#include "common/profiler.h"
|
||||
|
||||
#include "video_core/debug_utils/debug_utils.h"
|
||||
#include "video_core/pica.h"
|
||||
|
||||
#include "shader.h"
|
||||
#include "shader_interpreter.h"
|
||||
|
||||
namespace Pica {
|
||||
|
||||
namespace Shader {
|
||||
|
||||
void Setup(UnitState& state) {
|
||||
// TODO(bunnei): This will be used by the JIT in a subsequent commit
|
||||
}
|
||||
|
||||
static Common::Profiling::TimingCategory shader_category("Vertex Shader");
|
||||
|
||||
OutputVertex Run(UnitState& state, const InputVertex& input, int num_attributes) {
|
||||
auto& config = g_state.regs.vs;
|
||||
auto& setup = g_state.vs;
|
||||
|
||||
Common::Profiling::ScopeTimer timer(shader_category);
|
||||
|
||||
state.program_counter = config.main_offset;
|
||||
state.debug.max_offset = 0;
|
||||
state.debug.max_opdesc_id = 0;
|
||||
|
||||
// Setup input register table
|
||||
const auto& attribute_register_map = config.input_register_map;
|
||||
|
||||
if (num_attributes > 0) state.input_registers[attribute_register_map.attribute0_register] = input.attr[0];
|
||||
if (num_attributes > 1) state.input_registers[attribute_register_map.attribute1_register] = input.attr[1];
|
||||
if (num_attributes > 2) state.input_registers[attribute_register_map.attribute2_register] = input.attr[2];
|
||||
if (num_attributes > 3) state.input_registers[attribute_register_map.attribute3_register] = input.attr[3];
|
||||
if (num_attributes > 4) state.input_registers[attribute_register_map.attribute4_register] = input.attr[4];
|
||||
if (num_attributes > 5) state.input_registers[attribute_register_map.attribute5_register] = input.attr[5];
|
||||
if (num_attributes > 6) state.input_registers[attribute_register_map.attribute6_register] = input.attr[6];
|
||||
if (num_attributes > 7) state.input_registers[attribute_register_map.attribute7_register] = input.attr[7];
|
||||
if (num_attributes > 8) state.input_registers[attribute_register_map.attribute8_register] = input.attr[8];
|
||||
if (num_attributes > 9) state.input_registers[attribute_register_map.attribute9_register] = input.attr[9];
|
||||
if (num_attributes > 10) state.input_registers[attribute_register_map.attribute10_register] = input.attr[10];
|
||||
if (num_attributes > 11) state.input_registers[attribute_register_map.attribute11_register] = input.attr[11];
|
||||
if (num_attributes > 12) state.input_registers[attribute_register_map.attribute12_register] = input.attr[12];
|
||||
if (num_attributes > 13) state.input_registers[attribute_register_map.attribute13_register] = input.attr[13];
|
||||
if (num_attributes > 14) state.input_registers[attribute_register_map.attribute14_register] = input.attr[14];
|
||||
if (num_attributes > 15) state.input_registers[attribute_register_map.attribute15_register] = input.attr[15];
|
||||
|
||||
state.conditional_code[0] = false;
|
||||
state.conditional_code[1] = false;
|
||||
|
||||
RunInterpreter(state);
|
||||
|
||||
#if PICA_DUMP_SHADERS
|
||||
DebugUtils::DumpShader(setup.program_code.data(), state.debug.max_offset, setup.swizzle_data.data(),
|
||||
state.debug.max_opdesc_id, config.main_offset,
|
||||
g_state.regs.vs_output_attributes); // TODO: Don't hardcode VS here
|
||||
#endif
|
||||
|
||||
// Setup output data
|
||||
OutputVertex ret;
|
||||
// TODO(neobrain): Under some circumstances, up to 16 attributes may be output. We need to
|
||||
// figure out what those circumstances are and enable the remaining outputs then.
|
||||
for (int i = 0; i < 7; ++i) {
|
||||
const auto& output_register_map = g_state.regs.vs_output_attributes[i]; // TODO: Don't hardcode VS here
|
||||
|
||||
u32 semantics[4] = {
|
||||
output_register_map.map_x, output_register_map.map_y,
|
||||
output_register_map.map_z, output_register_map.map_w
|
||||
};
|
||||
|
||||
for (int comp = 0; comp < 4; ++comp) {
|
||||
float24* out = ((float24*)&ret) + semantics[comp];
|
||||
if (semantics[comp] != Regs::VSOutputAttributes::INVALID) {
|
||||
*out = state.output_registers[i][comp];
|
||||
} else {
|
||||
// Zero output so that attributes which aren't output won't have denormals in them,
|
||||
// which would slow us down later.
|
||||
memset(out, 0, sizeof(*out));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// The hardware takes the absolute and saturates vertex colors like this, *before* doing interpolation
|
||||
for (int i = 0; i < 4; ++i) {
|
||||
ret.color[i] = float24::FromFloat32(
|
||||
std::fmin(std::fabs(ret.color[i].ToFloat32()), 1.0f));
|
||||
}
|
||||
|
||||
LOG_TRACE(Render_Software, "Output vertex: pos (%.2f, %.2f, %.2f, %.2f), col(%.2f, %.2f, %.2f, %.2f), tc0(%.2f, %.2f)",
|
||||
ret.pos.x.ToFloat32(), ret.pos.y.ToFloat32(), ret.pos.z.ToFloat32(), ret.pos.w.ToFloat32(),
|
||||
ret.color.x.ToFloat32(), ret.color.y.ToFloat32(), ret.color.z.ToFloat32(), ret.color.w.ToFloat32(),
|
||||
ret.tc0.u().ToFloat32(), ret.tc0.v().ToFloat32());
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
} // namespace Shader
|
||||
|
||||
} // namespace Pica
|
||||
@ -0,0 +1,163 @@
|
||||
// Copyright 2015 Citra Emulator Project
|
||||
// Licensed under GPLv2 or any later version
|
||||
// Refer to the license.txt file included.
|
||||
|
||||
#pragma once
|
||||
|
||||
#include <boost/container/static_vector.hpp>
|
||||
#include <nihstro/shader_binary.h>
|
||||
|
||||
#include "common/common_funcs.h"
|
||||
#include "common/common_types.h"
|
||||
#include "common/vector_math.h"
|
||||
|
||||
#include "video_core/pica.h"
|
||||
|
||||
using nihstro::RegisterType;
|
||||
using nihstro::SourceRegister;
|
||||
using nihstro::DestRegister;
|
||||
|
||||
namespace Pica {
|
||||
|
||||
namespace Shader {
|
||||
|
||||
struct InputVertex {
|
||||
Math::Vec4<float24> attr[16];
|
||||
};
|
||||
|
||||
struct OutputVertex {
|
||||
OutputVertex() = default;
|
||||
|
||||
// VS output attributes
|
||||
Math::Vec4<float24> pos;
|
||||
Math::Vec4<float24> dummy; // quaternions (not implemented, yet)
|
||||
Math::Vec4<float24> color;
|
||||
Math::Vec2<float24> tc0;
|
||||
Math::Vec2<float24> tc1;
|
||||
float24 pad[6];
|
||||
Math::Vec2<float24> tc2;
|
||||
|
||||
// Padding for optimal alignment
|
||||
float24 pad2[4];
|
||||
|
||||
// Attributes used to store intermediate results
|
||||
|
||||
// position after perspective divide
|
||||
Math::Vec3<float24> screenpos;
|
||||
float24 pad3;
|
||||
|
||||
// Linear interpolation
|
||||
// factor: 0=this, 1=vtx
|
||||
void Lerp(float24 factor, const OutputVertex& vtx) {
|
||||
pos = pos * factor + vtx.pos * (float24::FromFloat32(1) - factor);
|
||||
|
||||
// TODO: Should perform perspective correct interpolation here...
|
||||
tc0 = tc0 * factor + vtx.tc0 * (float24::FromFloat32(1) - factor);
|
||||
tc1 = tc1 * factor + vtx.tc1 * (float24::FromFloat32(1) - factor);
|
||||
tc2 = tc2 * factor + vtx.tc2 * (float24::FromFloat32(1) - factor);
|
||||
|
||||
screenpos = screenpos * factor + vtx.screenpos * (float24::FromFloat32(1) - factor);
|
||||
|
||||
color = color * factor + vtx.color * (float24::FromFloat32(1) - factor);
|
||||
}
|
||||
|
||||
// Linear interpolation
|
||||
// factor: 0=v0, 1=v1
|
||||
static OutputVertex Lerp(float24 factor, const OutputVertex& v0, const OutputVertex& v1) {
|
||||
OutputVertex ret = v0;
|
||||
ret.Lerp(factor, v1);
|
||||
return ret;
|
||||
}
|
||||
};
|
||||
static_assert(std::is_pod<OutputVertex>::value, "Structure is not POD");
|
||||
static_assert(sizeof(OutputVertex) == 32 * sizeof(float), "OutputVertex has invalid size");
|
||||
|
||||
/**
|
||||
* This structure contains the state information that needs to be unique for a shader unit. The 3DS
|
||||
* has four shader units that process shaders in parallel. At the present, Citra only implements a
|
||||
* single shader unit that processes all shaders serially. Putting the state information in a struct
|
||||
* here will make it easier for us to parallelize the shader processing later.
|
||||
*/
|
||||
struct UnitState {
|
||||
// The registers are accessed by the shader JIT using SSE instructions, and are therefore
|
||||
// required to be 16-byte aligned.
|
||||
Math::Vec4<float24> MEMORY_ALIGNED16(input_registers[16]);
|
||||
Math::Vec4<float24> MEMORY_ALIGNED16(output_registers[16]);
|
||||
Math::Vec4<float24> MEMORY_ALIGNED16(temporary_registers[16]);
|
||||
|
||||
u32 program_counter;
|
||||
bool conditional_code[2];
|
||||
|
||||
// Two Address registers and one loop counter
|
||||
// TODO: How many bits do these actually have?
|
||||
s32 address_registers[3];
|
||||
|
||||
enum {
|
||||
INVALID_ADDRESS = 0xFFFFFFFF
|
||||
};
|
||||
|
||||
struct CallStackElement {
|
||||
u32 final_address; // Address upon which we jump to return_address
|
||||
u32 return_address; // Where to jump when leaving scope
|
||||
u8 repeat_counter; // How often to repeat until this call stack element is removed
|
||||
u8 loop_increment; // Which value to add to the loop counter after an iteration
|
||||
// TODO: Should this be a signed value? Does it even matter?
|
||||
u32 loop_address; // The address where we'll return to after each loop iteration
|
||||
};
|
||||
|
||||
// TODO: Is there a maximal size for this?
|
||||
boost::container::static_vector<CallStackElement, 16> call_stack;
|
||||
|
||||
struct {
|
||||
u32 max_offset; // maximum program counter ever reached
|
||||
u32 max_opdesc_id; // maximum swizzle pattern index ever used
|
||||
} debug;
|
||||
|
||||
static int InputOffset(const SourceRegister& reg) {
|
||||
switch (reg.GetRegisterType()) {
|
||||
case RegisterType::Input:
|
||||
return (int)offsetof(UnitState, input_registers) + reg.GetIndex()*sizeof(Math::Vec4<float24>);
|
||||
|
||||
case RegisterType::Temporary:
|
||||
return (int)offsetof(UnitState, temporary_registers) + reg.GetIndex()*sizeof(Math::Vec4<float24>);
|
||||
|
||||
default:
|
||||
UNREACHABLE();
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
static int OutputOffset(const DestRegister& reg) {
|
||||
switch (reg.GetRegisterType()) {
|
||||
case RegisterType::Output:
|
||||
return (int)offsetof(UnitState, output_registers) + reg.GetIndex()*sizeof(Math::Vec4<float24>);
|
||||
|
||||
case RegisterType::Temporary:
|
||||
return (int)offsetof(UnitState, temporary_registers) + reg.GetIndex()*sizeof(Math::Vec4<float24>);
|
||||
|
||||
default:
|
||||
UNREACHABLE();
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
/**
|
||||
* Performs any shader unit setup that only needs to happen once per shader (as opposed to once per
|
||||
* vertex, which would happen within the `Run` function).
|
||||
* @param state Shader unit state, must be setup per shader and per shader unit
|
||||
*/
|
||||
void Setup(UnitState& state);
|
||||
|
||||
/**
|
||||
* Runs the currently setup shader
|
||||
* @param state Shader unit state, must be setup per shader and per shader unit
|
||||
* @param input Input vertex into the shader
|
||||
* @param num_attributes The number of vertex shader attributes
|
||||
* @return The output vertex, after having been processed by the vertex shader
|
||||
*/
|
||||
OutputVertex Run(UnitState& state, const InputVertex& input, int num_attributes);
|
||||
|
||||
} // namespace Shader
|
||||
|
||||
} // namespace Pica
|
||||
Loading…
Reference in New Issue