470 lines
11 KiB
C++
470 lines
11 KiB
C++
/*
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* Copyright 2011-2023 Branimir Karadzic. All rights reserved.
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* License: https://github.com/bkaradzic/bgfx/blob/master/LICENSE
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*/
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#include "common.h"
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#include "bgfx_utils.h"
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#include <bx/uint32_t.h>
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#include <bx/thread.h>
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#include <bx/os.h>
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#include "imgui/imgui.h"
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#include <bgfx/embedded_shader.h>
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// embedded shaders
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#include "vs_drawstress.bin.h"
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#include "fs_drawstress.bin.h"
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namespace
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{
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static const bgfx::EmbeddedShader s_embeddedShaders[] =
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{
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BGFX_EMBEDDED_SHADER(vs_drawstress),
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BGFX_EMBEDDED_SHADER(fs_drawstress),
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BGFX_EMBEDDED_SHADER_END()
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};
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struct PosColorVertex
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{
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float m_x;
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float m_y;
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float m_z;
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uint32_t m_abgr;
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static void init()
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{
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ms_layout
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.begin()
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.add(bgfx::Attrib::Position, 3, bgfx::AttribType::Float)
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.add(bgfx::Attrib::Color0, 4, bgfx::AttribType::Uint8, true)
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.end();
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}
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static bgfx::VertexLayout ms_layout;
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};
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bgfx::VertexLayout PosColorVertex::ms_layout;
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static PosColorVertex s_cubeVertices[8] =
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{
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{-1.0f, 1.0f, 1.0f, 0xff000000 },
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{ 1.0f, 1.0f, 1.0f, 0xff0000ff },
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{-1.0f, -1.0f, 1.0f, 0xff00ff00 },
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{ 1.0f, -1.0f, 1.0f, 0xff00ffff },
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{-1.0f, 1.0f, -1.0f, 0xffff0000 },
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{ 1.0f, 1.0f, -1.0f, 0xffff00ff },
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{-1.0f, -1.0f, -1.0f, 0xffffff00 },
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{ 1.0f, -1.0f, -1.0f, 0xffffffff },
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};
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static const uint16_t s_cubeIndices[36] =
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{
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0, 1, 2, // 0
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1, 3, 2,
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4, 6, 5, // 2
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5, 6, 7,
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0, 2, 4, // 4
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4, 2, 6,
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1, 5, 3, // 6
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5, 7, 3,
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0, 4, 1, // 8
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4, 5, 1,
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2, 3, 6, // 10
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6, 3, 7,
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};
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static const float s_mod[6][3] =
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{
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{ 1.0f, 1.0f, 1.0f },
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{ 1.0f, 0.0f, 0.0f },
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{ 0.0f, 1.0f, 0.0f },
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{ 0.0f, 0.0f, 1.0f },
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{ 1.0f, 1.0f, 0.0f },
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{ 0.0f, 1.0f, 1.0f },
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};
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#if BX_PLATFORM_EMSCRIPTEN
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static const int64_t highwm = 1000000/35;
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static const int64_t lowwm = 1000000/27;
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#else
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static const int64_t highwm = 1000000/65;
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static const int64_t lowwm = 1000000/57;
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#endif // BX_PLATFORM_EMSCRIPTEN
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int32_t threadFunc(bx::Thread* _thread, void* _userData);
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class ExampleDrawStress : public entry::AppI
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{
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public:
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ExampleDrawStress(const char* _name, const char* _description, const char* _url)
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: entry::AppI(_name, _description, _url)
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{
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}
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void init(int32_t _argc, const char* const* _argv, uint32_t _width, uint32_t _height) override
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{
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Args args(_argc, _argv);
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m_width = _width;
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m_height = _height;
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m_debug = BGFX_DEBUG_NONE;
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m_reset = BGFX_RESET_NONE;
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m_autoAdjust = true;
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m_scrollArea = 0;
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m_dim = 16;
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m_maxDim = 40;
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m_transform = 0;
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m_timeOffset = bx::getHPCounter();
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m_deltaTimeNs = 0;
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m_deltaTimeAvgNs = 0;
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m_numFrames = 0;
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bgfx::Init init;
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init.type = args.m_type;
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init.vendorId = args.m_pciId;
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init.platformData.nwh = entry::getNativeWindowHandle(entry::kDefaultWindowHandle);
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init.platformData.ndt = entry::getNativeDisplayHandle();
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init.resolution.width = m_width;
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init.resolution.height = m_height;
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init.resolution.reset = m_reset;
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bgfx::init(init);
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const bgfx::Caps* caps = bgfx::getCaps();
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m_maxDim = (int32_t)bx::pow(float(caps->limits.maxDrawCalls), 1.0f/3.0f);
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// Enable debug text.
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bgfx::setDebug(m_debug);
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// Set view 0 clear state.
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bgfx::setViewClear(0
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, BGFX_CLEAR_COLOR|BGFX_CLEAR_DEPTH
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, 0x303030ff
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, 1.0f
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, 0
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);
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// Create vertex stream declaration.
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PosColorVertex::init();
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bgfx::RendererType::Enum type = bgfx::getRendererType();
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// Create program from shaders.
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m_program = bgfx::createProgram(
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bgfx::createEmbeddedShader(s_embeddedShaders, type, "vs_drawstress")
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, bgfx::createEmbeddedShader(s_embeddedShaders, type, "fs_drawstress")
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, true /* destroy shaders when program is destroyed */
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);
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// Create static vertex buffer.
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m_vbh = bgfx::createVertexBuffer(
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bgfx::makeRef(s_cubeVertices, sizeof(s_cubeVertices) )
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, PosColorVertex::ms_layout
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);
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// Create static index buffer.
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m_ibh = bgfx::createIndexBuffer(bgfx::makeRef(s_cubeIndices, sizeof(s_cubeIndices) ) );
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// Imgui.
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imguiCreate();
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m_maxThreads = bx::min<int32_t>(caps->limits.maxEncoders, BX_COUNTOF(m_thread) );
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m_numThreads = (m_maxThreads+1)/2;
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for (int32_t ii = 0; ii < m_maxThreads; ++ii)
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{
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m_thread[ii].init(threadFunc, this);
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}
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}
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int shutdown() override
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{
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for (int32_t ii = 0; ii < m_maxThreads; ++ii)
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{
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m_thread[ii].push(reinterpret_cast<void*>(UINTPTR_MAX) );
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m_thread[ii].shutdown();
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}
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// Cleanup.
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imguiDestroy();
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bgfx::destroy(m_ibh);
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bgfx::destroy(m_vbh);
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bgfx::destroy(m_program);
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// Shutdown bgfx.
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bgfx::shutdown();
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return 0;
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}
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int32_t thread(bx::Thread* _thread)
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{
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for (;;)
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{
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union
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{
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void* ptr;
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uintptr_t id;
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} cast;
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cast.ptr = _thread->pop();
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if (UINTPTR_MAX == cast.id)
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{
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break;
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}
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const uint32_t numThreads = uint32_t(cast.id);
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const uint32_t idx = uint32_t(_thread - m_thread);
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const uint32_t num = uint32_t(m_dim)/numThreads;
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const uint32_t rem = idx == numThreads-1 ? uint32_t(m_dim)%numThreads : 0;
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const uint32_t xx = idx*num;
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submit(idx+1, xx, num + rem);
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}
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return bx::kExitSuccess;
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}
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void submit(uint32_t _tid, uint32_t _xstart, uint32_t _num)
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{
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bgfx::Encoder* encoder = bgfx::begin();
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if (0 != _tid)
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{
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m_sync.post();
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}
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if (NULL != encoder)
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{
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const int64_t now = bx::getHPCounter();
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const double freq = double(bx::getHPFrequency() );
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float time = (float)( (now-m_timeOffset)/freq);
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const float* mod = s_mod[_tid%BX_COUNTOF(s_mod)];
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float mtxS[16];
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const float scale = 0 == m_transform ? 0.25f : 0.0f;
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bx::mtxScale(mtxS, scale, scale, scale);
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const float step = 0.6f;
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float pos[3];
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pos[0] = -step*m_dim / 2.0f;
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pos[1] = -step*m_dim / 2.0f;
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pos[2] = -15.0;
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for (uint32_t zz = 0; zz < uint32_t(m_dim); ++zz)
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{
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for (uint32_t yy = 0; yy < uint32_t(m_dim); ++yy)
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{
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for (uint32_t xx = _xstart, xend = _xstart+_num; xx < xend; ++xx)
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{
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float mtxR[16];
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bx::mtxRotateXYZ(mtxR
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, (time + xx*0.21f)*mod[0]
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, (time + yy*0.37f)*mod[1]
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, (time + zz*0.13f)*mod[2]
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);
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float mtx[16];
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bx::mtxMul(mtx, mtxS, mtxR);
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mtx[12] = pos[0] + float(xx)*step;
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mtx[13] = pos[1] + float(yy)*step;
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mtx[14] = pos[2] + float(zz)*step;
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encoder->setTransform(mtx);
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encoder->setVertexBuffer(0, m_vbh);
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encoder->setIndexBuffer(m_ibh);
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encoder->setState(BGFX_STATE_DEFAULT);
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encoder->submit(0, m_program);
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}
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}
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}
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bgfx::end(encoder);
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}
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}
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bool update() override
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{
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if (!entry::processEvents(m_width, m_height, m_debug, m_reset, &m_mouseState) )
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{
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int64_t now = bx::getHPCounter();
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static int64_t last = now;
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const int64_t hpFreq = bx::getHPFrequency();
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const int64_t frameTime = now - last;
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last = now;
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const double freq = double(hpFreq);
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const double toMs = 1000.0/freq;
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m_deltaTimeNs += frameTime*1000000/hpFreq;
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if (m_deltaTimeNs > 1000000)
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{
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m_deltaTimeAvgNs = m_deltaTimeNs / bx::max<int64_t>(1, m_numFrames);
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if (m_autoAdjust)
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{
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if (m_deltaTimeAvgNs < highwm)
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{
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m_dim = bx::uint32_min(m_dim + 2, m_maxDim);
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}
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else if (m_deltaTimeAvgNs > lowwm)
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{
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m_dim = bx::uint32_max(m_dim - 1, 2);
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}
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}
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m_deltaTimeNs = 0;
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m_numFrames = 0;
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}
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else
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{
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++m_numFrames;
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}
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imguiBeginFrame(m_mouseState.m_mx
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, m_mouseState.m_my
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, (m_mouseState.m_buttons[entry::MouseButton::Left ] ? IMGUI_MBUT_LEFT : 0)
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| (m_mouseState.m_buttons[entry::MouseButton::Right ] ? IMGUI_MBUT_RIGHT : 0)
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| (m_mouseState.m_buttons[entry::MouseButton::Middle] ? IMGUI_MBUT_MIDDLE : 0)
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, m_mouseState.m_mz
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, uint16_t(m_width)
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, uint16_t(m_height)
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);
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showExampleDialog(this);
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ImGui::SetNextWindowPos(
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ImVec2((float)m_width - (float)m_width / 4.0f - 10.0f, 10.0f)
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, ImGuiCond_FirstUseEver
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);
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ImGui::SetNextWindowSize(
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ImVec2((float)m_width / 4.0f, (float)m_height / 2.0f)
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, ImGuiCond_FirstUseEver
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);
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ImGui::Begin("Settings"
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, NULL
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, 0
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);
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ImGui::RadioButton("Rotate",&m_transform,0);
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ImGui::RadioButton("No fragments",&m_transform,1);
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ImGui::Separator();
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ImGui::Checkbox("Auto adjust", &m_autoAdjust);
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ImGui::SliderInt("Num threads", &m_numThreads, 1, m_maxThreads);
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const uint32_t numThreads = m_numThreads;
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ImGui::SliderInt("Dim", &m_dim, 5, m_maxDim);
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ImGui::Text("Draw calls: %d", m_dim*m_dim*m_dim);
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ImGui::Text("Avg Delta Time (1 second) [ms]: %0.4f", m_deltaTimeAvgNs/1000.0f);
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ImGui::Separator();
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const bgfx::Stats* stats = bgfx::getStats();
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ImGui::Text("GPU %0.6f [ms]", double(stats->gpuTimeEnd - stats->gpuTimeBegin)*1000.0/stats->gpuTimerFreq);
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ImGui::Text("CPU %0.6f [ms]", double(stats->cpuTimeEnd - stats->cpuTimeBegin)*1000.0/stats->cpuTimerFreq);
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ImGui::Text("Waiting for render thread %0.6f [ms]", double(stats->waitRender) * toMs);
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ImGui::Text("Waiting for submit thread %0.6f [ms]", double(stats->waitSubmit) * toMs);
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ImGui::End();
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imguiEndFrame();
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const bx::Vec3 at = { 0.0f, 0.0f, 0.0f };
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const bx::Vec3 eye = { 0.0f, 0.0f, -35.0f };
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float view[16];
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bx::mtxLookAt(view, eye, at);
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const bgfx::Caps* caps = bgfx::getCaps();
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float proj[16];
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bx::mtxProj(proj, 60.0f, float(m_width)/float(m_height), 0.1f, 100.0f, caps->homogeneousDepth);
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// Set view and projection matrix for view 0.
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bgfx::setViewTransform(0, view, proj);
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// Set view 0 default viewport.
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bgfx::setViewRect(0, 0, 0, uint16_t(m_width), uint16_t(m_height) );
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// This dummy draw call is here to make sure that view 0 is cleared
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// if no other draw calls are submitted to view 0.
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bgfx::touch(0);
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if (1 < numThreads)
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{
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for (uint32_t ii = 0; ii < numThreads; ++ii)
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{
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m_thread[ii].push(reinterpret_cast<void*>(uintptr_t(numThreads) ) );
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}
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for (uint32_t ii = 0; ii < numThreads; ++ii)
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{
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m_sync.wait();
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}
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}
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else
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{
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submit(0, 0, uint32_t(m_dim) );
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}
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// Advance to next frame. Rendering thread will be kicked to
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// process submitted rendering primitives.
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bgfx::frame();
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return true;
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}
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return false;
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}
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entry::MouseState m_mouseState;
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uint32_t m_width;
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uint32_t m_height;
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uint32_t m_debug;
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uint32_t m_reset;
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bool m_autoAdjust;
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int32_t m_scrollArea;
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int32_t m_dim;
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int32_t m_maxDim;
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int32_t m_transform;
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int32_t m_numThreads;
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int32_t m_maxThreads;
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int64_t m_timeOffset;
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int64_t m_deltaTimeNs;
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int64_t m_deltaTimeAvgNs;
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int64_t m_numFrames;
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bx::Thread m_thread[5];
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bx::Semaphore m_sync;
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bgfx::ProgramHandle m_program;
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bgfx::VertexBufferHandle m_vbh;
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bgfx::IndexBufferHandle m_ibh;
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};
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int32_t threadFunc(bx::Thread* _thread, void* _userData)
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{
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ExampleDrawStress* self = static_cast<ExampleDrawStress*>(_userData);
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return self->thread(_thread);
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}
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} // namespace
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ENTRY_IMPLEMENT_MAIN(
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ExampleDrawStress
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, "17-drawstress"
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, "Draw stress, maximizing number of draw calls."
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, "https://bkaradzic.github.io/bgfx/examples.html#drawstress"
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);
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