bgfx/examples/17-drawstress/drawstress.cpp
2015-08-21 21:06:46 -07:00

341 lines
8.0 KiB
C++

/*
* Copyright 2011-2015 Branimir Karadzic. All rights reserved.
* License: http://www.opensource.org/licenses/BSD-2-Clause
*/
#include <bgfx.h>
#include <bx/uint32_t.h>
#include "common.h"
#include "imgui/imgui.h"
// embedded shaders
#include "vs_drawstress.bin.h"
#include "fs_drawstress.bin.h"
struct PosColorVertex
{
float m_x;
float m_y;
float m_z;
uint32_t m_abgr;
static void init()
{
ms_decl
.begin()
.add(bgfx::Attrib::Position, 3, bgfx::AttribType::Float)
.add(bgfx::Attrib::Color0, 4, bgfx::AttribType::Uint8, true)
.end();
}
static bgfx::VertexDecl ms_decl;
};
bgfx::VertexDecl PosColorVertex::ms_decl;
static PosColorVertex s_cubeVertices[8] =
{
{-1.0f, 1.0f, 1.0f, 0xff000000 },
{ 1.0f, 1.0f, 1.0f, 0xff0000ff },
{-1.0f, -1.0f, 1.0f, 0xff00ff00 },
{ 1.0f, -1.0f, 1.0f, 0xff00ffff },
{-1.0f, 1.0f, -1.0f, 0xffff0000 },
{ 1.0f, 1.0f, -1.0f, 0xffff00ff },
{-1.0f, -1.0f, -1.0f, 0xffffff00 },
{ 1.0f, -1.0f, -1.0f, 0xffffffff },
};
static const uint16_t s_cubeIndices[36] =
{
0, 1, 2, // 0
1, 3, 2,
4, 6, 5, // 2
5, 6, 7,
0, 2, 4, // 4
4, 2, 6,
1, 5, 3, // 6
5, 7, 3,
0, 4, 1, // 8
4, 5, 1,
2, 3, 6, // 10
6, 3, 7,
};
#if BX_PLATFORM_EMSCRIPTEN || BX_PLATFORM_NACL
static const int64_t highwm = 1000000/35;
static const int64_t lowwm = 1000000/27;
#else
static const int64_t highwm = 1000000/65;
static const int64_t lowwm = 1000000/57;
#endif // BX_PLATFORM_EMSCRIPTEN || BX_PLATFORM_NACL
class DrawStress : public entry::AppI
{
void init(int /*_argc*/, char** /*_argv*/) BX_OVERRIDE
{
m_width = 1280;
m_height = 720;
m_debug = BGFX_DEBUG_TEXT;
m_reset = BGFX_RESET_NONE;
m_autoAdjust = true;
m_scrollArea = 0;
m_dim = 16;
m_maxDim = 40;
m_transform = 0;
m_timeOffset = bx::getHPCounter();
m_deltaTimeNs = 0;
m_deltaTimeAvgNs = 0;
m_numFrames = 0;
bgfx::init();
bgfx::reset(m_width, m_height, m_reset);
const bgfx::Caps* caps = bgfx::getCaps();
m_maxDim = (int32_t)powf(float(caps->maxDrawCalls), 1.0f/3.0f);
// Enable debug text.
bgfx::setDebug(m_debug);
// Set view 0 clear state.
bgfx::setViewClear(0
, BGFX_CLEAR_COLOR|BGFX_CLEAR_DEPTH
, 0x303030ff
, 1.0f
, 0
);
// Create vertex stream declaration.
PosColorVertex::init();
const bgfx::Memory* vs_drawstress;
const bgfx::Memory* fs_drawstress;
switch (bgfx::getRendererType() )
{
case bgfx::RendererType::Direct3D9:
vs_drawstress = bgfx::makeRef(vs_drawstress_dx9, sizeof(vs_drawstress_dx9) );
fs_drawstress = bgfx::makeRef(fs_drawstress_dx9, sizeof(fs_drawstress_dx9) );
break;
case bgfx::RendererType::Direct3D11:
case bgfx::RendererType::Direct3D12:
vs_drawstress = bgfx::makeRef(vs_drawstress_dx11, sizeof(vs_drawstress_dx11) );
fs_drawstress = bgfx::makeRef(fs_drawstress_dx11, sizeof(fs_drawstress_dx11) );
break;
default:
vs_drawstress = bgfx::makeRef(vs_drawstress_glsl, sizeof(vs_drawstress_glsl) );
fs_drawstress = bgfx::makeRef(fs_drawstress_glsl, sizeof(fs_drawstress_glsl) );
break;
}
// Create program from shaders.
m_program = bgfx::createProgram(
bgfx::createShader(vs_drawstress)
, bgfx::createShader(fs_drawstress)
, true /* destroy shaders when program is destroyed */
);
// Create static vertex buffer.
m_vbh = bgfx::createVertexBuffer(
bgfx::makeRef(s_cubeVertices, sizeof(s_cubeVertices) )
, PosColorVertex::ms_decl
);
// Create static index buffer.
m_ibh = bgfx::createIndexBuffer(bgfx::makeRef(s_cubeIndices, sizeof(s_cubeIndices) ) );
// Imgui.
imguiCreate();
}
int shutdown() BX_OVERRIDE
{
// Cleanup.
imguiDestroy();
bgfx::destroyIndexBuffer(m_ibh);
bgfx::destroyVertexBuffer(m_vbh);
bgfx::destroyProgram(m_program);
// Shutdown bgfx.
bgfx::shutdown();
return 0;
}
bool update() BX_OVERRIDE
{
if (!entry::processEvents(m_width, m_height, m_debug, m_reset, &m_mouseState) )
{
int64_t now = bx::getHPCounter();
static int64_t last = now;
const int64_t hpFreq = bx::getHPFrequency();
const int64_t frameTime = now - last;
last = now;
const double freq = double(hpFreq);
const double toMs = 1000.0/freq;
m_deltaTimeNs += frameTime*1000000/hpFreq;
if (m_deltaTimeNs > 1000000)
{
m_deltaTimeAvgNs = m_deltaTimeNs / bx::int64_max(1, m_numFrames);
if (m_autoAdjust)
{
if (m_deltaTimeAvgNs < highwm)
{
m_dim = bx::uint32_min(m_dim + 2, m_maxDim);
}
else if (m_deltaTimeAvgNs > lowwm)
{
m_dim = bx::uint32_max(m_dim - 1, 2);
}
}
m_deltaTimeNs = 0;
m_numFrames = 0;
}
else
{
++m_numFrames;
}
float time = (float)( (now-m_timeOffset)/freq);
imguiBeginFrame(m_mouseState.m_mx
, m_mouseState.m_my
, (m_mouseState.m_buttons[entry::MouseButton::Left ] ? IMGUI_MBUT_LEFT : 0)
| (m_mouseState.m_buttons[entry::MouseButton::Right ] ? IMGUI_MBUT_RIGHT : 0)
, m_mouseState.m_mz
, m_width
, m_height
);
imguiBeginScrollArea("Settings", m_width - m_width / 4 - 10, 10, m_width / 4, m_height / 3, &m_scrollArea);
imguiSeparatorLine();
m_transform = imguiChoose(m_transform
, "Rotate"
, "No fragments"
);
imguiSeparatorLine();
if (imguiCheck("Auto adjust", m_autoAdjust) )
{
m_autoAdjust ^= true;
}
imguiSlider("Dim", m_dim, 5, m_maxDim);
imguiLabel("Draw calls: %d", m_dim*m_dim*m_dim);
imguiLabel("Avg Delta Time (1 second) [ms]: %0.4f", m_deltaTimeAvgNs/1000.0f);
imguiEndScrollArea();
imguiEndFrame();
float at[3] = { 0.0f, 0.0f, 0.0f };
float eye[3] = { 0.0f, 0.0f, -35.0f };
float view[16];
float proj[16];
bx::mtxLookAt(view, eye, at);
bx::mtxProj(proj, 60.0f, float(m_width)/float(m_height), 0.1f, 100.0f);
// Set view and projection matrix for view 0.
bgfx::setViewTransform(0, view, proj);
// Set view 0 default viewport.
bgfx::setViewRect(0, 0, 0, m_width, m_height);
// This dummy draw call is here to make sure that view 0 is cleared
// if no other draw calls are submitted to view 0.
bgfx::touch(0);
// Use debug font to print information about this example.
bgfx::dbgTextClear();
bgfx::dbgTextPrintf(0, 1, 0x4f, "bgfx/examples/17-drawstress");
bgfx::dbgTextPrintf(0, 2, 0x6f, "Description: Draw stress, maximizing number of draw calls.");
bgfx::dbgTextPrintf(0, 3, 0x0f, "Frame: %7.3f[ms]", double(frameTime)*toMs);
float mtxS[16];
const float scale = 0 == m_transform ? 0.25f : 0.0f;
bx::mtxScale(mtxS, scale, scale, scale);
const float step = 0.6f;
float pos[3];
pos[0] = -step*m_dim / 2.0f;
pos[1] = -step*m_dim / 2.0f;
pos[2] = -15.0;
for (uint32_t zz = 0; zz < uint32_t(m_dim); ++zz)
{
for (uint32_t yy = 0; yy < uint32_t(m_dim); ++yy)
{
for (uint32_t xx = 0; xx < uint32_t(m_dim); ++xx)
{
float mtxR[16];
bx::mtxRotateXYZ(mtxR, time + xx*0.21f, time + yy*0.37f, time + yy*0.13f);
float mtx[16];
bx::mtxMul(mtx, mtxS, mtxR);
mtx[12] = pos[0] + float(xx)*step;
mtx[13] = pos[1] + float(yy)*step;
mtx[14] = pos[2] + float(zz)*step;
// Set model matrix for rendering.
bgfx::setTransform(mtx);
// Set vertex and index buffer.
bgfx::setVertexBuffer(m_vbh);
bgfx::setIndexBuffer(m_ibh);
// Set render states.
bgfx::setState(BGFX_STATE_DEFAULT);
// Submit primitive for rendering to view 0.
bgfx::submit(0, m_program);
}
}
}
// Advance to next frame. Rendering thread will be kicked to
// process submitted rendering primitives.
bgfx::frame();
return true;
}
return false;
}
entry::MouseState m_mouseState;
uint32_t m_width;
uint32_t m_height;
uint32_t m_debug;
uint32_t m_reset;
bool m_autoAdjust;
int32_t m_scrollArea;
int32_t m_dim;
int32_t m_maxDim;
uint32_t m_transform;
int64_t m_timeOffset;
int64_t m_deltaTimeNs;
int64_t m_deltaTimeAvgNs;
int64_t m_numFrames;
bgfx::ProgramHandle m_program;
bgfx::VertexBufferHandle m_vbh;
bgfx::IndexBufferHandle m_ibh;
};
ENTRY_IMPLEMENT_MAIN(DrawStress);