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basic-nvcommandlist.cpp
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/*
* Copyright (c) 2014-2021, NVIDIA CORPORATION. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* SPDX-FileCopyrightText: Copyright (c) 2014-2021 NVIDIA CORPORATION
* SPDX-License-Identifier: Apache-2.0
*/
/* Contact [email protected] (Christoph Kubisch) for feedback */
#define DEBUG_FILTER 1
#define USE_PROGRAM_FILTER 1
#define ALLOW_EMULATION_LAYER 1
#include <nvgl/extensions_gl.hpp>
#include <imgui/backends/imgui_impl_gl.h>
#include <imgui/imgui_helper.h>
#include <nvgl/glsltypes_gl.hpp>
#include <nvmath/nvmath_glsltypes.h>
#include <nvh/cameracontrol.hpp>
#include <nvh/geometry.hpp>
#include <nvh/misc.hpp>
#include <nvgl/appwindowprofiler_gl.hpp>
#include <nvgl/base_gl.hpp>
#include <nvgl/error_gl.hpp>
#include <nvgl/programmanager_gl.hpp>
#include "common.h"
#include "nvtoken.hpp"
using namespace nvtoken;
namespace basiccmdlist {
int const SAMPLE_SIZE_WIDTH(800);
int const SAMPLE_SIZE_HEIGHT(600);
int const SAMPLE_MAJOR_VERSION(4);
int const SAMPLE_MINOR_VERSION(5);
static const int numObjects = 1024;
static const int grid = 64;
static const float globalscale = 8.0f;
class Sample : public nvgl::AppWindowProfilerGL
{
enum DrawMode
{
DRAW_STANDARD,
DRAW_TOKEN_EMULATED,
DRAW_TOKEN_BUFFER,
DRAW_TOKEN_LIST,
};
struct
{
nvgl::ProgramID draw_scene, draw_scene_geo;
} programs;
struct
{
GLuint scene_color = 0;
GLuint scene_depthstencil = 0;
GLuint color = 0;
} textures;
struct
{
GLuint64 scene_color, scene_depthstencil, color;
} texturesADDR;
struct
{
GLuint scene = 0;
} fbos;
struct
{
GLuint box_vbo = 0;
GLuint box_ibo = 0;
GLuint sphere_vbo = 0;
GLuint sphere_ibo = 0;
GLuint scene_ubo = 0;
GLuint objects_ubo = 0;
} buffers;
struct
{
GLuint64 box_vbo, box_ibo, sphere_vbo, sphere_ibo,
scene_ubo, objects_ubo;
} buffersADDR;
struct Vertex
{
Vertex(const nvh::geometry::Vertex& vertex)
{
position = vertex.position;
normal[0] = short(vertex.normal.x * float(32767));
normal[1] = short(vertex.normal.y * float(32767));
normal[2] = short(vertex.normal.z * float(32767));
uv = vec2(vertex.texcoord);
}
nvmath::vec4 position;
short normal[4];
nvmath::vec2 uv;
};
struct ObjectInfo
{
GLuint vbo;
GLuint ibo;
GLuint64 vboADDR;
GLuint64 iboADDR;
GLuint numIndices;
nvgl::ProgramID program;
};
// COMMANDLIST
struct StateChangeID
{
uint programChangeID;
uint fboChangeID;
bool operator==(const StateChangeID& other) const { return memcmp(this, &other, sizeof(StateChangeID)) == 0; }
bool operator!=(const StateChangeID& other) const { return memcmp(this, &other, sizeof(StateChangeID)) != 0; }
StateChangeID()
: programChangeID(0)
, fboChangeID(0)
{
}
};
struct CmdList
{
// we introduce variables that track when we changed global state
StateChangeID state;
StateChangeID captured;
// two state objects
GLuint stateobj_draw;
GLuint stateobj_draw_geo;
#if ALLOW_EMULATION_LAYER
// for emulation
StateSystem statesystem;
StateSystem::StateID stateid_draw;
StateSystem::StateID stateid_draw_geo;
#endif
// there is multiple ways to draw the scene
// either via buffer, cmdlist object, or emulation
GLuint tokenBuffer;
GLuint tokenCmdList;
std::string tokenData;
nvtoken::NVTokenSequence tokenSequence;
nvtoken::NVTokenSequence tokenSequenceList;
nvtoken::NVTokenSequence tokenSequenceEmu;
} cmdlist;
struct Tweak
{
DrawMode mode = DRAW_STANDARD;
vec3 lightDir;
float animate = 1.0f;
};
nvgl::ProgramManager m_progManager;
ImGuiH::Registry m_ui;
double m_uiTime;
Tweak m_tweak;
std::vector<ObjectInfo> m_sceneObjects;
SceneData m_sceneUbo;
bool m_bindlessVboUbo;
bool m_hwsupport;
nvh::CameraControl m_control;
bool begin();
void processUI(double time);
void think(double time);
void resize(int width, int height);
bool initProgram();
bool initFramebuffers(int width, int height);
bool initScene();
#if ALLOW_EMULATION_LAYER
bool initCommandList();
void updateCommandListState();
#else
bool initCommandListMinimal();
void updateCommandListStateMinimal();
#endif
void drawStandard();
void drawTokenBuffer();
void drawTokenList();
#if ALLOW_EMULATION_LAYER
void drawTokenEmulation();
#endif
void end() { ImGui::ShutdownGL(); }
// return true to prevent m_windowState updates
bool mouse_pos(int x, int y) { return ImGuiH::mouse_pos(x, y); }
bool mouse_button(int button, int action) { return ImGuiH::mouse_button(button, action); }
bool mouse_wheel(int wheel) { return ImGuiH::mouse_wheel(wheel); }
bool key_char(int button) { return ImGuiH::key_char(button); }
bool key_button(int button, int action, int mods) { return ImGuiH::key_button(button, action, mods); }
public:
Sample()
{
m_parameterList.add("drawmode", (uint32_t*)&m_tweak.mode);
m_parameterList.add("animate", &m_tweak.animate);
}
};
bool Sample::initProgram()
{
bool validated(true);
m_progManager.m_filetype = nvh::ShaderFileManager::FILETYPE_GLSL;
m_progManager.addDirectory(std::string(PROJECT_NAME));
m_progManager.addDirectory(std::string("GLSL_" PROJECT_NAME));
m_progManager.addDirectory(exePath() + std::string(PROJECT_RELDIRECTORY));
m_progManager.registerInclude("common.h");
programs.draw_scene = m_progManager.createProgram(ProgramManager::Definition(GL_VERTEX_SHADER, "scene.vert.glsl"),
ProgramManager::Definition(GL_FRAGMENT_SHADER, "scene.frag.glsl"));
programs.draw_scene_geo =
m_progManager.createProgram(ProgramManager::Definition(GL_VERTEX_SHADER, "scene.vert.glsl"),
ProgramManager::Definition(GL_GEOMETRY_SHADER, "scene.geo.glsl"),
ProgramManager::Definition(GL_FRAGMENT_SHADER, "scene.frag.glsl"));
cmdlist.state.programChangeID++;
validated = m_progManager.areProgramsValid();
return validated;
}
bool Sample::initFramebuffers(int width, int height)
{
if(textures.scene_color && has_GL_ARB_bindless_texture)
{
glMakeTextureHandleNonResidentARB(texturesADDR.scene_color);
glMakeTextureHandleNonResidentARB(texturesADDR.scene_depthstencil);
}
newTexture(textures.scene_color, GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, textures.scene_color);
glTexStorage2D(GL_TEXTURE_2D, 1, GL_RGBA8, width, height);
newTexture(textures.scene_depthstencil, GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, textures.scene_depthstencil);
glTexStorage2D(GL_TEXTURE_2D, 1, GL_DEPTH24_STENCIL8, width, height);
glBindTexture(GL_TEXTURE_2D, 0);
newFramebuffer(fbos.scene);
glBindFramebuffer(GL_FRAMEBUFFER, fbos.scene);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, textures.scene_color, 0);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_TEXTURE_2D, textures.scene_depthstencil, 0);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
// COMMANDLIST
// As stateobjects and cmdlist objects make references to texture memory, you need ensure residency,
// as well as rebuilding state objects as FBO memory changes.
if(has_GL_ARB_bindless_texture)
{
texturesADDR.scene_color = glGetTextureHandleARB(textures.scene_color);
texturesADDR.scene_depthstencil = glGetTextureHandleARB(textures.scene_depthstencil);
glMakeTextureHandleResidentARB(texturesADDR.scene_color);
glMakeTextureHandleResidentARB(texturesADDR.scene_depthstencil);
}
cmdlist.state.fboChangeID++;
return true;
}
bool Sample::initScene()
{
srand(1238);
{
// pattern texture
int size = 32;
std::vector<nvmath::vector4<unsigned char>> texels;
texels.resize(size * size);
for(int y = 0; y < size; y++)
{
for(int x = 0; x < size; x++)
{
int pos = x + y * size;
nvmath::vector4<unsigned char> texel;
texel[0] = ((x + y ^ 127) & 15) * 17;
texel[1] = ((x + y ^ 127) & 31) * 8;
texel[2] = ((x + y ^ 127) & 63) * 4;
texel[3] = 255;
texels[pos] = texel;
}
}
newTexture(textures.color, GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, textures.color);
glTexStorage2D(GL_TEXTURE_2D, nvh::mipMapLevels(size), GL_RGBA8, size, size);
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, size, size, GL_RGBA, GL_UNSIGNED_BYTE, &texels[0]);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY, 8.0f);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glGenerateMipmap(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, 0);
// this sample requires use of bindless texture
texturesADDR.color = glGetTextureHandleARB(textures.color);
glMakeTextureHandleResidentARB(texturesADDR.color);
}
{ // Scene Geometry
nvh::geometry::Box<Vertex> box;
newBuffer(buffers.box_ibo);
glNamedBufferStorage(buffers.box_ibo, box.getTriangleIndicesSize(), &box.m_indicesTriangles[0], 0);
newBuffer(buffers.box_vbo);
glNamedBufferStorage(buffers.box_vbo, box.getVerticesSize(), &box.m_vertices[0], 0);
if(m_bindlessVboUbo)
{
glGetNamedBufferParameterui64vNV(buffers.box_ibo, GL_BUFFER_GPU_ADDRESS_NV, &buffersADDR.box_ibo);
glGetNamedBufferParameterui64vNV(buffers.box_vbo, GL_BUFFER_GPU_ADDRESS_NV, &buffersADDR.box_vbo);
glMakeNamedBufferResidentNV(buffers.box_ibo, GL_READ_ONLY);
glMakeNamedBufferResidentNV(buffers.box_vbo, GL_READ_ONLY);
}
nvh::geometry::Sphere<Vertex> sphere;
newBuffer(buffers.sphere_ibo);
glNamedBufferStorage(buffers.sphere_ibo, sphere.getTriangleIndicesSize(), &sphere.m_indicesTriangles[0], 0);
newBuffer(buffers.sphere_vbo);
glNamedBufferStorage(buffers.sphere_vbo, sphere.getVerticesSize(), &sphere.m_vertices[0], 0);
if(m_bindlessVboUbo)
{
glGetNamedBufferParameterui64vNV(buffers.sphere_ibo, GL_BUFFER_GPU_ADDRESS_NV, &buffersADDR.sphere_ibo);
glGetNamedBufferParameterui64vNV(buffers.sphere_vbo, GL_BUFFER_GPU_ADDRESS_NV, &buffersADDR.sphere_vbo);
glMakeNamedBufferResidentNV(buffers.sphere_ibo, GL_READ_ONLY);
glMakeNamedBufferResidentNV(buffers.sphere_vbo, GL_READ_ONLY);
}
// Scene objects
newBuffer(buffers.objects_ubo);
glBindBuffer(GL_UNIFORM_BUFFER, buffers.objects_ubo);
glBufferData(GL_UNIFORM_BUFFER, uboAligned(sizeof(ObjectData)) * numObjects, NULL, GL_STATIC_DRAW);
if(m_bindlessVboUbo)
{
glGetNamedBufferParameterui64vNV(buffers.objects_ubo, GL_BUFFER_GPU_ADDRESS_NV, &buffersADDR.objects_ubo);
glMakeNamedBufferResidentNV(buffers.objects_ubo, GL_READ_ONLY);
}
m_sceneObjects.reserve(numObjects);
for(int i = 0; i < numObjects; i++)
{
ObjectData ubodata;
vec3 pos(nvh::frand() * float(grid), nvh::frand() * float(grid), nvh::frand() * float(grid / 2));
float scale = globalscale / float(grid);
scale += (nvh::frand()) * 0.25f;
pos -= vec3(grid / 2, grid / 2, grid / 4);
pos /= float(grid) / globalscale;
float angle = nvh::frand() * 180.f;
ubodata.worldMatrix = nvmath::translation_mat4(pos) * nvmath::scale_mat4(vec3(scale)) * nvmath::rotation_mat4_x(angle);
ubodata.worldMatrixIT = nvmath::transpose(nvmath::invert(ubodata.worldMatrix));
ubodata.texScale.x = rand() % 2 + 1.0f;
ubodata.texScale.y = rand() % 2 + 1.0f;
ubodata.color = vec4(nvh::frand(), nvh::frand(), nvh::frand(), 1.0f);
ubodata.texColor = texturesADDR.color; // bindless texture used
glBufferSubData(GL_UNIFORM_BUFFER, uboAligned(sizeof(ObjectData)) * i, sizeof(ObjectData), &ubodata);
ObjectInfo info;
info.program = pos.x < 0 ? programs.draw_scene_geo : programs.draw_scene;
if(rand() % 2)
{
info.ibo = buffers.sphere_ibo;
info.vbo = buffers.sphere_vbo;
info.iboADDR = buffersADDR.sphere_ibo;
info.vboADDR = buffersADDR.sphere_vbo;
info.numIndices = sphere.getTriangleIndicesCount();
}
else
{
info.ibo = buffers.box_ibo;
info.vbo = buffers.box_vbo;
info.iboADDR = buffersADDR.box_ibo;
info.vboADDR = buffersADDR.box_vbo;
info.numIndices = box.getTriangleIndicesCount();
}
m_sceneObjects.push_back(info);
}
glBindBuffer(GL_UNIFORM_BUFFER, 0);
}
{ // Scene UBO
newBuffer(buffers.scene_ubo);
glBindBuffer(GL_UNIFORM_BUFFER, buffers.scene_ubo);
glBufferData(GL_UNIFORM_BUFFER, sizeof(SceneData), NULL, GL_DYNAMIC_DRAW);
glBindBuffer(GL_UNIFORM_BUFFER, 0);
if(m_bindlessVboUbo)
{
glGetNamedBufferParameterui64vNV(buffers.scene_ubo, GL_BUFFER_GPU_ADDRESS_NV, &buffersADDR.scene_ubo);
glMakeNamedBufferResidentNV(buffers.scene_ubo, GL_READ_ONLY);
}
}
return true;
}
NV_INLINE GLuint getAddressLo(GLuint64 address)
{
return GLuint(address & 0xFFFFFFFF);
}
NV_INLINE GLuint getAddressHi(GLuint64 address)
{
return GLuint(address >> 32);
}
#if !ALLOW_EMULATION_LAYER
bool Sample::initCommandListMinimal()
{
m_hwsupport = init_NV_command_list(NVPSystem::GetProcAddressGL) ? true : false;
if(!m_hwsupport)
return true;
glCreateStatesNV(1, &cmdlist.stateobj_draw);
glCreateStatesNV(1, &cmdlist.stateobj_draw_geo);
glCreateBuffers(1, &cmdlist.tokenBuffer);
glCreateCommandListsNV(1, &cmdlist.tokenCmdList);
GLenum headerUbo = glGetCommandHeaderNV(GL_UNIFORM_ADDRESS_COMMAND_NV, sizeof(UniformAddressCommandNV));
GLenum headerVbo = glGetCommandHeaderNV(GL_ATTRIBUTE_ADDRESS_COMMAND_NV, sizeof(AttributeAddressCommandNV));
GLenum headerIbo = glGetCommandHeaderNV(GL_ELEMENT_ADDRESS_COMMAND_NV, sizeof(ElementAddressCommandNV));
GLenum headerDraw = glGetCommandHeaderNV(GL_DRAW_ELEMENTS_COMMAND_NV, sizeof(DrawElementsCommandNV));
GLushort stageVertex = glGetStageIndexNV(GL_VERTEX_SHADER);
GLushort stageFragment = glGetStageIndexNV(GL_FRAGMENT_SHADER);
GLushort stageGeometry = glGetStageIndexNV(GL_GEOMETRY_SHADER);
// create actual token stream from our scene
{
NVTokenSequence& seq = cmdlist.tokenSequence;
std::string& stream = cmdlist.tokenData;
size_t offset = 0;
// at first we bind the scene ubo to all used stages
{
UniformAddressCommandNV ubo;
ubo.header = headerUbo;
ubo.index = UBO_SCENE;
ubo.addressLo = getAddressLo(buffersADDR.scene_ubo);
ubo.addressHi = getAddressHi(buffersADDR.scene_ubo);
ubo.stage = stageVertex;
nvtokenEnqueue(stream, ubo);
ubo.stage = stageGeometry;
nvtokenEnqueue(stream, ubo);
ubo.stage = stageFragment;
nvtokenEnqueue(stream, ubo);
}
// then we iterate over all objects in our scene
GLuint lastStateobj = 0;
for(size_t i = 0; i < m_sceneObjects.size(); i++)
{
const ObjectInfo& obj = m_sceneObjects[i];
GLuint usedStateobj = obj.program == programs.draw_scene ? cmdlist.stateobj_draw : cmdlist.stateobj_draw_geo;
if(lastStateobj != 0 && (usedStateobj != lastStateobj || !USE_PROGRAM_FILTER))
{
// Whenever our program changes a new stateobject is required,
// hence the current sequence gets appended
seq.offsets.push_back(offset);
seq.sizes.push_back(GLsizei(stream.size() - offset));
seq.states.push_back(lastStateobj);
// By passing the fbo here, it means we can render objects
// even as the fbos get resized (and their textures changed).
// If we would pass 0 it would mean the stateobject's fbo was used
// which means on fbo resizes we would have to recreate all stateobjects.
seq.fbos.push_back(fbos.scene);
// new sequence start
offset = stream.size();
}
AttributeAddressCommandNV vbo;
vbo.header = headerVbo;
vbo.index = 0;
vbo.addressLo = getAddressLo(obj.vboADDR);
vbo.addressHi = getAddressHi(obj.vboADDR);
nvtokenEnqueue(stream, vbo);
ElementAddressCommandNV ibo;
ibo.header = headerIbo;
ibo.typeSizeInByte = 4;
ibo.addressLo = getAddressLo(obj.iboADDR);
ibo.addressHi = getAddressHi(obj.iboADDR);
nvtokenEnqueue(stream, ibo);
UniformAddressCommandNV ubo;
ubo.header = headerUbo;
ubo.index = UBO_OBJECT;
ubo.addressLo = getAddressLo(buffersADDR.objects_ubo + GLuint(uboAligned(sizeof(ObjectData)) * i));
ubo.addressHi = getAddressHi(buffersADDR.objects_ubo + GLuint(uboAligned(sizeof(ObjectData)) * i));
ubo.stage = stageVertex;
nvtokenEnqueue(stream, ubo);
ubo.stage = stageFragment;
nvtokenEnqueue(stream, ubo);
if(usedStateobj == cmdlist.stateobj_draw_geo)
{
// also add for geometry stage
ubo.stage = stageGeometry;
nvtokenEnqueue(stream, ubo);
}
DrawElementsCommandNV draw;
draw.header = headerDraw;
draw.baseVertex = 0;
draw.firstIndex = 0;
draw.count = obj.numIndices;
nvtokenEnqueue(stream, draw);
lastStateobj = usedStateobj;
}
seq.offsets.push_back(offset);
seq.sizes.push_back(GLsizei(stream.size() - offset));
seq.fbos.push_back(fbos.scene);
seq.states.push_back(lastStateobj);
}
// upload the tokens once, so we can reuse them efficiently
glNamedBufferStorage(cmdlist.tokenBuffer, cmdlist.tokenData.size(), &cmdlist.tokenData[0], 0);
// for list generation convert offsets to pointers
cmdlist.tokenSequenceList = cmdlist.tokenSequence;
for(size_t i = 0; i < cmdlist.tokenSequenceList.offsets.size(); i++)
{
cmdlist.tokenSequenceList.offsets[i] += (GLintptr)&cmdlist.tokenData[0];
}
updateCommandListStateMinimal();
return true;
}
void Sample::updateCommandListStateMinimal()
{
if(cmdlist.state.programChangeID != cmdlist.captured.programChangeID)
{
// generic state shared by both programs
glBindFramebuffer(GL_FRAMEBUFFER, fbos.scene);
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
glEnableVertexAttribArray(VERTEX_POS);
glEnableVertexAttribArray(VERTEX_NORMAL);
glEnableVertexAttribArray(VERTEX_UV);
glVertexAttribFormat(VERTEX_POS, 3, GL_FLOAT, GL_FALSE, offsetof(Vertex, position));
glVertexAttribFormat(VERTEX_NORMAL, 3, GL_SHORT, GL_TRUE, offsetof(Vertex, normal));
glVertexAttribFormat(VERTEX_UV, 2, GL_FLOAT, GL_FALSE, offsetof(Vertex, uv));
glVertexAttribBinding(VERTEX_POS, 0);
glVertexAttribBinding(VERTEX_NORMAL, 0);
glVertexAttribBinding(VERTEX_UV, 0);
// prime the stride parameter, used by bindless VBO and statesystem
glBindVertexBuffer(0, 0, 0, sizeof(Vertex));
glBufferAddressRangeNV(GL_VERTEX_ATTRIB_ARRAY_ADDRESS_NV, 0, 0, 0);
glBufferAddressRangeNV(GL_ELEMENT_ARRAY_ADDRESS_NV, 0, 0, 0);
glBufferAddressRangeNV(GL_UNIFORM_BUFFER_ADDRESS_NV, UBO_OBJECT, 0, 0);
glBufferAddressRangeNV(GL_UNIFORM_BUFFER_ADDRESS_NV, UBO_SCENE, 0, 0);
// let's create the first stateobject
glUseProgram(m_progManager.get(programs.draw_scene));
glStateCaptureNV(cmdlist.stateobj_draw, GL_TRIANGLES);
// and second
glUseProgram(m_progManager.get(programs.draw_scene_geo));
glStateCaptureNV(cmdlist.stateobj_draw_geo, GL_TRIANGLES);
glDisableVertexAttribArray(VERTEX_POS);
glDisableVertexAttribArray(VERTEX_NORMAL);
glDisableVertexAttribArray(VERTEX_UV);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glDisable(GL_DEPTH_TEST);
glDisable(GL_CULL_FACE);
}
if(cmdlist.state.programChangeID != cmdlist.captured.programChangeID || cmdlist.state.fboChangeID != cmdlist.captured.fboChangeID)
{
// Because the commandlist object takes all state information
// from the objects during compile, we have to update commandlist
// every time a state object or fbo changes.
NVTokenSequence& seq = cmdlist.tokenSequenceList;
glCommandListSegmentsNV(cmdlist.tokenCmdList, 1);
glListDrawCommandsStatesClientNV(cmdlist.tokenCmdList, 0, (const void**)&seq.offsets[0], &seq.sizes[0],
&seq.states[0], &seq.fbos[0], int(seq.states.size()));
glCompileCommandListNV(cmdlist.tokenCmdList);
}
cmdlist.captured = cmdlist.state;
}
#else
bool Sample::initCommandList()
{
m_hwsupport = has_GL_NV_command_list ? true : false;
nvtokenInitInternals(m_hwsupport, m_bindlessVboUbo);
cmdlist.statesystem.init();
{
cmdlist.statesystem.generate(1, &cmdlist.stateid_draw);
cmdlist.statesystem.generate(1, &cmdlist.stateid_draw_geo);
}
if(m_hwsupport)
{
glCreateStatesNV(1, &cmdlist.stateobj_draw);
glCreateStatesNV(1, &cmdlist.stateobj_draw_geo);
glCreateBuffers(1, &cmdlist.tokenBuffer);
glCreateCommandListsNV(1, &cmdlist.tokenCmdList);
}
else
{
cmdlist.stateobj_draw = 1;
cmdlist.stateobj_draw_geo = 2;
}
// create actual token stream from our scene
{
NVTokenSequence& seq = cmdlist.tokenSequence;
std::string& stream = cmdlist.tokenData;
size_t offset = 0;
// at first we bind the scene ubo to all used stages
{
NVTokenUbo ubo;
ubo.setBuffer(buffers.scene_ubo, buffersADDR.scene_ubo, 0, sizeof(SceneData));
ubo.setBinding(UBO_SCENE, NVTOKEN_STAGE_VERTEX);
nvtokenEnqueue(stream, ubo);
ubo.setBinding(UBO_SCENE, NVTOKEN_STAGE_GEOMETRY);
nvtokenEnqueue(stream, ubo);
ubo.setBinding(UBO_SCENE, NVTOKEN_STAGE_FRAGMENT);
nvtokenEnqueue(stream, ubo);
}
// then we iterate over all objects in our scene
GLuint lastStateobj = 0;
for(size_t i = 0; i < m_sceneObjects.size(); i++)
{
const ObjectInfo& obj = m_sceneObjects[i];
GLuint usedStateobj = obj.program == programs.draw_scene ? cmdlist.stateobj_draw : cmdlist.stateobj_draw_geo;
if(lastStateobj != 0 && (usedStateobj != lastStateobj || !USE_PROGRAM_FILTER))
{
// Whenever our program changes a new stateobject is required,
// hence the current sequence gets appended
seq.offsets.push_back(offset);
seq.sizes.push_back(GLsizei(stream.size() - offset));
seq.states.push_back(lastStateobj);
// By passing the fbo here, it means we can render objects
// even as the fbos get resized (and their textures changed).
// If we would pass 0 it would mean the stateobject's fbo was used
// which means on fbo resizes we would have to recreate all stateobjects.
seq.fbos.push_back(fbos.scene);
// new sequence start
offset = stream.size();
}
NVTokenVbo vbo;
vbo.setBinding(0);
vbo.setBuffer(obj.vbo, obj.vboADDR, 0);
nvtokenEnqueue(stream, vbo);
NVTokenIbo ibo;
ibo.setType(GL_UNSIGNED_INT);
ibo.setBuffer(obj.ibo, obj.iboADDR);
nvtokenEnqueue(stream, ibo);
NVTokenUbo ubo;
ubo.setBuffer(buffers.objects_ubo, buffersADDR.objects_ubo, GLuint(uboAligned(sizeof(ObjectData)) * i), sizeof(ObjectData));
ubo.setBinding(UBO_OBJECT, NVTOKEN_STAGE_VERTEX);
nvtokenEnqueue(stream, ubo);
ubo.setBinding(UBO_OBJECT, NVTOKEN_STAGE_FRAGMENT);
nvtokenEnqueue(stream, ubo);
if(usedStateobj == cmdlist.stateobj_draw_geo)
{
// also add for geometry stage
ubo.setBinding(UBO_OBJECT, NVTOKEN_STAGE_GEOMETRY);
nvtokenEnqueue(stream, ubo);
}
NVTokenDrawElems draw;
draw.setParams(obj.numIndices);
// be aware the stateobject's primitive mode must be compatible!
draw.setMode(GL_TRIANGLES);
nvtokenEnqueue(stream, draw);
lastStateobj = usedStateobj;
}
seq.offsets.push_back(offset);
seq.sizes.push_back(GLsizei(stream.size() - offset));
seq.fbos.push_back(fbos.scene);
seq.states.push_back(lastStateobj);
}
if(m_hwsupport)
{
// upload the tokens once, so we can reuse them efficiently
glNamedBufferStorage(cmdlist.tokenBuffer, cmdlist.tokenData.size(), &cmdlist.tokenData[0], 0);
// for list generation convert offsets to pointers
cmdlist.tokenSequenceList = cmdlist.tokenSequence;
for(size_t i = 0; i < cmdlist.tokenSequenceList.offsets.size(); i++)
{
cmdlist.tokenSequenceList.offsets[i] += (GLintptr)&cmdlist.tokenData[0];
}
}
{
// for emulation we have to convert the stateobject ids to statesystem ids
cmdlist.tokenSequenceEmu = cmdlist.tokenSequence;
for(size_t i = 0; i < cmdlist.tokenSequenceEmu.states.size(); i++)
{
GLuint oldstate = cmdlist.tokenSequenceEmu.states[i];
cmdlist.tokenSequenceEmu.states[i] = (oldstate == cmdlist.stateobj_draw) ? cmdlist.stateid_draw : cmdlist.stateid_draw_geo;
}
}
updateCommandListState();
return true;
}
void Sample::updateCommandListState()
{
if(cmdlist.state.programChangeID != cmdlist.captured.programChangeID)
{
// generic state shared by both programs
glBindFramebuffer(GL_FRAMEBUFFER, fbos.scene);
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
glEnableVertexAttribArray(VERTEX_POS);
glEnableVertexAttribArray(VERTEX_NORMAL);
glEnableVertexAttribArray(VERTEX_UV);
glVertexAttribFormat(VERTEX_POS, 3, GL_FLOAT, GL_FALSE, offsetof(Vertex, position));
glVertexAttribFormat(VERTEX_NORMAL, 3, GL_SHORT, GL_TRUE, offsetof(Vertex, normal));
glVertexAttribFormat(VERTEX_UV, 2, GL_FLOAT, GL_FALSE, offsetof(Vertex, uv));
glVertexAttribBinding(VERTEX_POS, 0);
glVertexAttribBinding(VERTEX_NORMAL, 0);
glVertexAttribBinding(VERTEX_UV, 0);
// prime the stride parameter, used by bindless VBO and statesystem
glBindVertexBuffer(0, 0, 0, sizeof(Vertex));
// temp workaround
if(m_hwsupport)
{
glBufferAddressRangeNV(GL_VERTEX_ATTRIB_ARRAY_ADDRESS_NV, 0, 0, 0);
glBufferAddressRangeNV(GL_ELEMENT_ARRAY_ADDRESS_NV, 0, 0, 0);
glBufferAddressRangeNV(GL_UNIFORM_BUFFER_ADDRESS_NV, UBO_OBJECT, 0, 0);
glBufferAddressRangeNV(GL_UNIFORM_BUFFER_ADDRESS_NV, UBO_SCENE, 0, 0);
}
// let's create the first stateobject
glUseProgram(m_progManager.get(programs.draw_scene));
if(m_hwsupport)
{
glStateCaptureNV(cmdlist.stateobj_draw, GL_TRIANGLES);
}
StateSystem::State state;
state.getGL(); // this is a costly operation
cmdlist.statesystem.set(cmdlist.stateid_draw, state, GL_TRIANGLES);
// The statesystem also provides an alternative approach
// to getGL, by manipulating the state data directly.
// When no getGL is called the state data matches the default
// state of OpenGL.
state.program.program = m_progManager.get(programs.draw_scene_geo);
cmdlist.statesystem.set(cmdlist.stateid_draw_geo, state, GL_TRIANGLES);
if(m_hwsupport)
{
// we can apply the state directly with
// glUseProgram( state.program.program );
// or
// state.applyGL(false,false, 1<<StateSystem::DYNAMIC_VIEWPORT);
// or more efficiently using the system which will use state diffs
cmdlist.statesystem.applyGL(cmdlist.stateid_draw_geo, cmdlist.stateid_draw, true);
glStateCaptureNV(cmdlist.stateobj_draw_geo, GL_TRIANGLES);
}
// since we will toggle between two states, let the emulation cache the differences
cmdlist.statesystem.prepareTransition(cmdlist.stateid_draw, cmdlist.stateid_draw_geo);
cmdlist.statesystem.prepareTransition(cmdlist.stateid_draw_geo, cmdlist.stateid_draw);
glDisableVertexAttribArray(VERTEX_POS);
glDisableVertexAttribArray(VERTEX_NORMAL);
glDisableVertexAttribArray(VERTEX_UV);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glDisable(GL_DEPTH_TEST);
glDisable(GL_CULL_FACE);
}
if(m_hwsupport
&& (cmdlist.state.programChangeID != cmdlist.captured.programChangeID
|| cmdlist.state.fboChangeID != cmdlist.captured.fboChangeID))
{
// Because the commandlist object takes all state information
// from the objects during compile, we have to update commandlist
// every time a state object or fbo changes.
NVTokenSequence& seq = cmdlist.tokenSequenceList;
glCommandListSegmentsNV(cmdlist.tokenCmdList, 1);
glListDrawCommandsStatesClientNV(cmdlist.tokenCmdList, 0, (const void**)&seq.offsets[0], &seq.sizes[0],
&seq.states[0], &seq.fbos[0], int(seq.states.size()));
glCompileCommandListNV(cmdlist.tokenCmdList);
}
cmdlist.captured = cmdlist.state;
}
#endif
bool Sample::begin()
{
ImGuiH::Init(m_windowState.m_winSize[0], m_windowState.m_winSize[1], this);
ImGui::InitGL();
if(!has_GL_ARB_bindless_texture)
{
LOGE("This sample requires ARB_bindless_texture");
return false;
}
m_bindlessVboUbo = has_GL_NV_vertex_buffer_unified_memory
&& m_contextWindow.extensionSupported("GL_NV_uniform_buffer_unified_memory");
bool validated(true);
GLuint defaultVAO;
glGenVertexArrays(1, &defaultVAO);
glBindVertexArray(defaultVAO);
validated = validated && initProgram();
validated = validated && initFramebuffers(m_windowState.m_winSize[0], m_windowState.m_winSize[1]);
validated = validated && initScene();
#if ALLOW_EMULATION_LAYER
validated = validated && initCommandList();
#else
validated = validated && initCommandListMinimal();
#endif
{
m_ui.enumAdd(0, DRAW_STANDARD, "standard");
#if ALLOW_EMULATION_LAYER
m_ui.enumAdd(0, DRAW_TOKEN_EMULATED, "nvcmdlist emulated");
#endif
if(m_hwsupport)
{
m_ui.enumAdd(0, DRAW_TOKEN_BUFFER, "nvcmdlist buffer");
m_ui.enumAdd(0, DRAW_TOKEN_LIST, "nvcmdlist list");
}
}
m_tweak.lightDir = normalize(vec3(-1, 1, 1));
m_control.m_sceneOrbit = vec3(0.0f);
m_control.m_sceneDimension = float(grid) * 0.2f;
m_control.m_viewMatrix = nvmath::look_at(m_control.m_sceneOrbit - vec3(0, 0, -m_control.m_sceneDimension),
m_control.m_sceneOrbit, vec3(0, 1, 0));
m_sceneUbo.shrinkFactor = 0.5f;
return validated;
}
void Sample::processUI(double time)
{
int width = m_windowState.m_winSize[0];
int height = m_windowState.m_winSize[1];
// Update imgui configuration
auto& imgui_io = ImGui::GetIO();
imgui_io.DeltaTime = static_cast<float>(time - m_uiTime);
imgui_io.DisplaySize = ImVec2(width, height);
m_uiTime = time;
ImGui::NewFrame();
ImGui::SetNextWindowSize(ImGuiH::dpiScaled(350, 0), ImGuiCond_FirstUseEver);
if(ImGui::Begin("NVIDIA " PROJECT_NAME, nullptr))
{
m_ui.enumCombobox(0, "draw mode", &m_tweak.mode);
ImGui::SliderFloat("shrink factor", &m_sceneUbo.shrinkFactor, 0, 1.0f);
}
ImGui::End();
}
void Sample::think(double time)
{
NV_PROFILE_GL_SECTION("Frame");
processUI(time);
m_control.processActions(m_windowState.m_winSize,
nvmath::vec2f(m_windowState.m_mouseCurrent[0], m_windowState.m_mouseCurrent[1]),
m_windowState.m_mouseButtonFlags, m_windowState.m_mouseWheel);
int width = m_windowState.m_winSize[0];
int height = m_windowState.m_winSize[1];
if(m_windowState.onPress(KEY_R))
{
m_progManager.reloadPrograms();
cmdlist.state.programChangeID++;
}
if(!m_progManager.areProgramsValid())
{
waitEvents();