521 lines
13 KiB
C++
521 lines
13 KiB
C++
/*
|
|
* Copyright 2011-2014 Branimir Karadzic. All rights reserved.
|
|
* License: http://www.opensource.org/licenses/BSD-2-Clause
|
|
*/
|
|
|
|
#include "common.h"
|
|
|
|
#include <bgfx.h>
|
|
#include <bx/timer.h>
|
|
#include "fpumath.h"
|
|
#include "imgui/imgui.h"
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
struct PosColorVertex
|
|
{
|
|
float m_x;
|
|
float m_y;
|
|
float m_z;
|
|
uint32_t m_abgr;
|
|
|
|
static void init()
|
|
{
|
|
ms_decl.begin();
|
|
ms_decl.add(bgfx::Attrib::Position, 3, bgfx::AttribType::Float);
|
|
ms_decl.add(bgfx::Attrib::Color0, 4, bgfx::AttribType::Uint8, true);
|
|
ms_decl.end();
|
|
}
|
|
|
|
static bgfx::VertexDecl ms_decl;
|
|
};
|
|
|
|
bgfx::VertexDecl PosColorVertex::ms_decl;
|
|
|
|
struct PosColorTexCoord0Vertex
|
|
{
|
|
float m_x;
|
|
float m_y;
|
|
float m_z;
|
|
uint32_t m_rgba;
|
|
float m_u;
|
|
float m_v;
|
|
|
|
static void init()
|
|
{
|
|
ms_decl.begin();
|
|
ms_decl.add(bgfx::Attrib::Position, 3, bgfx::AttribType::Float);
|
|
ms_decl.add(bgfx::Attrib::Color0, 4, bgfx::AttribType::Uint8, true);
|
|
ms_decl.add(bgfx::Attrib::TexCoord0, 2, bgfx::AttribType::Float);
|
|
ms_decl.end();
|
|
}
|
|
|
|
static bgfx::VertexDecl ms_decl;
|
|
};
|
|
|
|
bgfx::VertexDecl PosColorTexCoord0Vertex::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,
|
|
};
|
|
|
|
static const char* s_shaderPath = NULL;
|
|
|
|
static void shaderFilePath(char* _out, const char* _name)
|
|
{
|
|
strcpy(_out, s_shaderPath);
|
|
strcat(_out, _name);
|
|
strcat(_out, ".bin");
|
|
}
|
|
|
|
long int fsize(FILE* _file)
|
|
{
|
|
long int pos = ftell(_file);
|
|
fseek(_file, 0L, SEEK_END);
|
|
long int size = ftell(_file);
|
|
fseek(_file, pos, SEEK_SET);
|
|
return size;
|
|
}
|
|
|
|
static const bgfx::Memory* load(const char* _filePath)
|
|
{
|
|
FILE* file = fopen(_filePath, "rb");
|
|
if (NULL != file)
|
|
{
|
|
uint32_t size = (uint32_t)fsize(file);
|
|
const bgfx::Memory* mem = bgfx::alloc(size+1);
|
|
size_t ignore = fread(mem->data, 1, size, file);
|
|
BX_UNUSED(ignore);
|
|
fclose(file);
|
|
mem->data[mem->size-1] = '\0';
|
|
return mem;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static const bgfx::Memory* loadShader(const char* _name)
|
|
{
|
|
char filePath[512];
|
|
shaderFilePath(filePath, _name);
|
|
return load(filePath);
|
|
}
|
|
|
|
static bgfx::ProgramHandle loadProgram(const char* _vshName, const char* _fshName)
|
|
{
|
|
const bgfx::Memory* mem;
|
|
|
|
mem = loadShader(_vshName);
|
|
bgfx::ShaderHandle vsh = bgfx::createShader(mem);
|
|
|
|
mem = loadShader(_fshName);
|
|
bgfx::ShaderHandle fsh = bgfx::createShader(mem);
|
|
|
|
return bgfx::createProgram(vsh, fsh, true);
|
|
}
|
|
|
|
static float s_texelHalf = 0.0f;
|
|
static bool s_flipV = false;
|
|
|
|
void screenSpaceQuad(float _textureWidth, float _textureHeight, bool _originBottomLeft = false, float _width = 1.0f, float _height = 1.0f)
|
|
{
|
|
if (bgfx::checkAvailTransientVertexBuffer(3, PosColorTexCoord0Vertex::ms_decl) )
|
|
{
|
|
bgfx::TransientVertexBuffer vb;
|
|
bgfx::allocTransientVertexBuffer(&vb, 3, PosColorTexCoord0Vertex::ms_decl);
|
|
PosColorTexCoord0Vertex* vertex = (PosColorTexCoord0Vertex*)vb.data;
|
|
|
|
const float zz = 0.0f;
|
|
|
|
const float minx = -_width;
|
|
const float maxx = _width;
|
|
const float miny = 0.0f;
|
|
const float maxy = _height*2.0f;
|
|
|
|
const float texelHalfW = s_texelHalf/_textureWidth;
|
|
const float texelHalfH = s_texelHalf/_textureHeight;
|
|
const float minu = -1.0f + texelHalfW;
|
|
const float maxu = 1.0f + texelHalfW;
|
|
|
|
float minv = texelHalfH;
|
|
float maxv = 2.0f + texelHalfH;
|
|
|
|
if (_originBottomLeft)
|
|
{
|
|
float tmp = minv;
|
|
minv = maxv;
|
|
maxv = tmp;
|
|
|
|
minv -= 1.0f;
|
|
maxv -= 1.0f;
|
|
}
|
|
|
|
vertex[0].m_x = minx;
|
|
vertex[0].m_y = miny;
|
|
vertex[0].m_z = zz;
|
|
vertex[0].m_rgba = 0xffffffff;
|
|
vertex[0].m_u = minu;
|
|
vertex[0].m_v = minv;
|
|
|
|
vertex[1].m_x = maxx;
|
|
vertex[1].m_y = miny;
|
|
vertex[1].m_z = zz;
|
|
vertex[1].m_rgba = 0xffffffff;
|
|
vertex[1].m_u = maxu;
|
|
vertex[1].m_v = minv;
|
|
|
|
vertex[2].m_x = maxx;
|
|
vertex[2].m_y = maxy;
|
|
vertex[2].m_z = zz;
|
|
vertex[2].m_rgba = 0xffffffff;
|
|
vertex[2].m_u = maxu;
|
|
vertex[2].m_v = maxv;
|
|
|
|
bgfx::setVertexBuffer(&vb);
|
|
}
|
|
}
|
|
|
|
int _main_(int /*_argc*/, char** /*_argv*/)
|
|
{
|
|
// Create vertex stream declaration.
|
|
PosColorVertex::init();
|
|
PosColorTexCoord0Vertex::init();
|
|
|
|
uint32_t width = 1280;
|
|
uint32_t height = 720;
|
|
uint32_t debug = BGFX_DEBUG_TEXT;
|
|
uint32_t reset = BGFX_RESET_VSYNC;
|
|
|
|
bgfx::init();
|
|
bgfx::reset(width, height, reset);
|
|
|
|
// Enable debug text.
|
|
bgfx::setDebug(debug);
|
|
|
|
// Get renderer capabilities info.
|
|
const bgfx::Caps* caps = bgfx::getCaps();
|
|
|
|
// Setup root path for binary shaders. Shader binaries are different
|
|
// for each renderer.
|
|
switch (caps->rendererType)
|
|
{
|
|
default:
|
|
case bgfx::RendererType::Direct3D9:
|
|
s_shaderPath = "shaders/dx9/";
|
|
s_texelHalf = 0.5f;
|
|
break;
|
|
|
|
case bgfx::RendererType::Direct3D11:
|
|
s_shaderPath = "shaders/dx11/";
|
|
break;
|
|
|
|
case bgfx::RendererType::OpenGL:
|
|
s_shaderPath = "shaders/glsl/";
|
|
s_flipV = true;
|
|
break;
|
|
|
|
case bgfx::RendererType::OpenGLES2:
|
|
case bgfx::RendererType::OpenGLES3:
|
|
s_shaderPath = "shaders/gles/";
|
|
s_flipV = true;
|
|
break;
|
|
}
|
|
|
|
// Imgui.
|
|
FILE* file = fopen("font/droidsans.ttf", "rb");
|
|
uint32_t size = (uint32_t)fsize(file);
|
|
void* data = malloc(size);
|
|
size_t ignore = fread(data, 1, size, file);
|
|
BX_UNUSED(ignore);
|
|
fclose(file);
|
|
imguiCreate(data, size);
|
|
|
|
const bgfx::Memory* mem;
|
|
|
|
// Create static vertex buffer.
|
|
mem = bgfx::makeRef(s_cubeVertices, sizeof(s_cubeVertices) );
|
|
bgfx::VertexBufferHandle vbh = bgfx::createVertexBuffer(mem, PosColorVertex::ms_decl);
|
|
|
|
// Create static index buffer.
|
|
mem = bgfx::makeRef(s_cubeIndices, sizeof(s_cubeIndices) );
|
|
bgfx::IndexBufferHandle ibh = bgfx::createIndexBuffer(mem);
|
|
|
|
// Create texture sampler uniforms.
|
|
bgfx::UniformHandle u_texColor0 = bgfx::createUniform("u_texColor0", bgfx::UniformType::Uniform1iv);
|
|
bgfx::UniformHandle u_texColor1 = bgfx::createUniform("u_texColor1", bgfx::UniformType::Uniform1iv);
|
|
bgfx::UniformHandle u_color = bgfx::createUniform("u_color", bgfx::UniformType::Uniform4fv);
|
|
|
|
bgfx::ProgramHandle blend = loadProgram("vs_oit", "fs_oit" );
|
|
bgfx::ProgramHandle wbSeparatePass = loadProgram("vs_oit", "fs_oit_wb_separate" );
|
|
bgfx::ProgramHandle wbSeparateBlit = loadProgram("vs_oit_blit", "fs_oit_wb_separate_blit" );
|
|
bgfx::ProgramHandle wbPass = loadProgram("vs_oit", "fs_oit_wb" );
|
|
bgfx::ProgramHandle wbBlit = loadProgram("vs_oit_blit", "fs_oit_wb_blit" );
|
|
|
|
bgfx::TextureHandle fbtextures[2] = { BGFX_INVALID_HANDLE, BGFX_INVALID_HANDLE };
|
|
bgfx::FrameBufferHandle fbh = BGFX_INVALID_HANDLE;
|
|
|
|
int64_t timeOffset = bx::getHPCounter();
|
|
|
|
uint32_t mode = 1;
|
|
int32_t scrollArea = 0;
|
|
bool frontToBack = true;
|
|
bool fadeInOut = false;
|
|
|
|
uint32_t oldWidth = 0;
|
|
uint32_t oldHeight = 0;
|
|
uint32_t oldReset = reset;
|
|
|
|
entry::MouseState mouseState;
|
|
while (!entry::processEvents(width, height, debug, reset, &mouseState) )
|
|
{
|
|
if (oldWidth != width
|
|
|| oldHeight != height
|
|
|| oldReset != reset
|
|
|| !bgfx::isValid(fbh) )
|
|
{
|
|
// Recreate variable size render targets when resolution changes.
|
|
oldWidth = width;
|
|
oldHeight = height;
|
|
oldReset = reset;
|
|
|
|
if (bgfx::isValid(fbh) )
|
|
{
|
|
bgfx::destroyFrameBuffer(fbh);
|
|
}
|
|
|
|
fbtextures[0] = bgfx::createTexture2D(width, height, 1, bgfx::TextureFormat::RGBA16F, BGFX_TEXTURE_RT),
|
|
fbtextures[1] = bgfx::createTexture2D(width, height, 1, bgfx::TextureFormat::R16F, BGFX_TEXTURE_RT),
|
|
fbh = bgfx::createFrameBuffer(BX_COUNTOF(fbtextures), fbtextures, true);
|
|
}
|
|
|
|
imguiBeginFrame(mouseState.m_mx
|
|
, mouseState.m_my
|
|
, (mouseState.m_buttons[entry::MouseButton::Left ] ? IMGUI_MBUT_LEFT : 0)
|
|
| (mouseState.m_buttons[entry::MouseButton::Right ] ? IMGUI_MBUT_RIGHT : 0)
|
|
, 0
|
|
, width
|
|
, height
|
|
);
|
|
|
|
imguiBeginScrollArea("Settings", width - width / 4 - 10, 10, width / 4, height / 3, &scrollArea);
|
|
imguiSeparatorLine();
|
|
|
|
imguiLabel("Blend mode:");
|
|
|
|
mode = imguiChoose(mode
|
|
, "None"
|
|
, "Separate"
|
|
, "MRT Independent"
|
|
);
|
|
|
|
imguiSeparatorLine();
|
|
|
|
if (imguiCheck("Front to back", frontToBack) )
|
|
{
|
|
frontToBack ^= true;
|
|
}
|
|
|
|
if (imguiCheck("Fade in/out", fadeInOut) )
|
|
{
|
|
fadeInOut ^= true;
|
|
}
|
|
|
|
imguiEndScrollArea();
|
|
imguiEndFrame();
|
|
|
|
// Set view 0 default viewport.
|
|
bgfx::setViewRectMask(0x3, 0, 0, width, height);
|
|
|
|
int64_t now = bx::getHPCounter();
|
|
static int64_t last = now;
|
|
const int64_t frameTime = now - last;
|
|
last = now;
|
|
const double freq = double(bx::getHPFrequency() );
|
|
const double toMs = 1000.0/freq;
|
|
|
|
float time = (float)( (now-timeOffset)/freq);
|
|
|
|
// Use debug font to print information about this example.
|
|
bgfx::dbgTextClear();
|
|
// Reference:
|
|
// Weighted, Blended Order-Independent Transparency
|
|
// http://jcgt.org/published/0002/02/09/
|
|
// http://casual-effects.blogspot.com/2014/03/weighted-blended-order-independent.html
|
|
bgfx::dbgTextPrintf(0, 1, 0x4f, "bgfx/examples/19-oit");
|
|
bgfx::dbgTextPrintf(0, 2, 0x6f, "Description: Weighted, Blended Order Independent Transparency.");
|
|
bgfx::dbgTextPrintf(0, 3, 0x0f, "Frame: % 7.3f[ms]", double(frameTime)*toMs);
|
|
|
|
float at[3] = { 0.0f, 0.0f, 0.0f };
|
|
float eye[3] = { 0.0f, 0.0f, -7.0f };
|
|
|
|
float view[16];
|
|
float proj[16];
|
|
|
|
// Set view and projection matrix for view 0.
|
|
mtxLookAt(view, eye, at);
|
|
mtxProj(proj, 60.0f, float(width)/float(height), 0.1f, 100.0f);
|
|
|
|
bgfx::setViewTransform(0, view, proj);
|
|
|
|
bgfx::setViewClearMask(0x3
|
|
, BGFX_CLEAR_COLOR_BIT|BGFX_CLEAR_DEPTH_BIT
|
|
, 0x00000000
|
|
, 1.0f
|
|
, 0
|
|
);
|
|
|
|
bgfx::FrameBufferHandle invalid = BGFX_INVALID_HANDLE;
|
|
bgfx::setViewFrameBuffer(0, 0 == mode ? invalid : fbh);
|
|
|
|
// Set view and projection matrix for view 1.
|
|
mtxIdentity(view);
|
|
mtxOrtho(proj, 0.0f, 1.0f, 1.0f, 0.0f, 0.0f, 100.0f);
|
|
bgfx::setViewTransform(1, view, proj);
|
|
|
|
for (uint32_t depth = 0; depth < 3; ++depth)
|
|
{
|
|
uint32_t zz = frontToBack ? 2-depth : depth;
|
|
|
|
for (uint32_t yy = 0; yy < 3; ++yy)
|
|
{
|
|
for (uint32_t xx = 0; xx < 3; ++xx)
|
|
{
|
|
float color[4] = { xx*1.0f/3.0f, zz*1.0f/3.0f, yy*1.0f/3.0f, 0.5f };
|
|
|
|
if (fadeInOut
|
|
&& zz == 1)
|
|
{
|
|
color[3] = sinf(time*3.0f)*0.49f+0.5f;
|
|
}
|
|
|
|
bgfx::setUniform(u_color, color);
|
|
|
|
BX_UNUSED(time);
|
|
float mtx[16];
|
|
mtxRotateXY(mtx, time*0.023f + xx*0.21f, time*0.03f + yy*0.37f);
|
|
//mtxIdentity(mtx);
|
|
mtx[12] = -2.5f + float(xx)*2.5f;
|
|
mtx[13] = -2.5f + float(yy)*2.5f;
|
|
mtx[14] = -2.5f + float(zz)*2.5f; //0.0f; // sinf(time + ( (xx+1)*(yy+1)/9.0f)*float(M_PI) )*50.0f+50.0f; //90.0f - (xx+1)*(yy+1)*10.0f;
|
|
|
|
// Set transform for draw call.
|
|
bgfx::setTransform(mtx);
|
|
|
|
// Set vertex and index buffer.
|
|
bgfx::setVertexBuffer(vbh);
|
|
bgfx::setIndexBuffer(ibh);
|
|
|
|
const uint64_t state = 0
|
|
| BGFX_STATE_CULL_CW
|
|
| BGFX_STATE_RGB_WRITE
|
|
| BGFX_STATE_ALPHA_WRITE
|
|
| BGFX_STATE_DEPTH_TEST_LESS
|
|
| BGFX_STATE_MSAA
|
|
;
|
|
|
|
switch (mode)
|
|
{
|
|
case 0:
|
|
// Set vertex and fragment shaders.
|
|
bgfx::setProgram(blend);
|
|
|
|
// Set render states.
|
|
bgfx::setState(state
|
|
| BGFX_STATE_BLEND_ALPHA
|
|
);
|
|
break;
|
|
|
|
case 1:
|
|
// Set vertex and fragment shaders.
|
|
bgfx::setProgram(wbSeparatePass);
|
|
|
|
// Set render states.
|
|
bgfx::setState(state
|
|
| BGFX_STATE_BLEND_FUNC_SEPARATE(BGFX_STATE_BLEND_ONE, BGFX_STATE_BLEND_ONE, BGFX_STATE_BLEND_ZERO, BGFX_STATE_BLEND_INV_SRC_ALPHA)
|
|
);
|
|
break;
|
|
|
|
default:
|
|
// Set vertex and fragment shaders.
|
|
bgfx::setProgram(wbPass);
|
|
|
|
// Set render states.
|
|
bgfx::setState(state
|
|
| BGFX_STATE_BLEND_FUNC(BGFX_STATE_BLEND_ONE, BGFX_STATE_BLEND_ONE)
|
|
| BGFX_STATE_BLEND_INDEPENDENT
|
|
, 0
|
|
| BGFX_STATE_BLEND_FUNC_RT_1(BGFX_STATE_BLEND_ZERO, BGFX_STATE_BLEND_SRC_COLOR)
|
|
);
|
|
break;
|
|
}
|
|
|
|
// Submit primitive for rendering to view 0.
|
|
bgfx::submit(0);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (0 != mode)
|
|
{
|
|
bgfx::setTexture(0, u_texColor0, fbtextures[0]);
|
|
bgfx::setTexture(1, u_texColor1, fbtextures[1]);
|
|
bgfx::setProgram(1 == mode ? wbSeparateBlit : wbBlit);
|
|
bgfx::setState(0
|
|
| BGFX_STATE_RGB_WRITE
|
|
| BGFX_STATE_BLEND_FUNC(BGFX_STATE_BLEND_INV_SRC_ALPHA, BGFX_STATE_BLEND_SRC_ALPHA)
|
|
);
|
|
screenSpaceQuad( (float)width, (float)height, s_flipV);
|
|
bgfx::submit(1);
|
|
}
|
|
|
|
// Advance to next frame. Rendering thread will be kicked to
|
|
// process submitted rendering primitives.
|
|
bgfx::frame();
|
|
}
|
|
|
|
// Cleanup.
|
|
imguiDestroy();
|
|
|
|
bgfx::destroyFrameBuffer(fbh);
|
|
bgfx::destroyIndexBuffer(ibh);
|
|
bgfx::destroyVertexBuffer(vbh);
|
|
bgfx::destroyProgram(blend);
|
|
bgfx::destroyProgram(wbSeparatePass);
|
|
bgfx::destroyProgram(wbSeparateBlit);
|
|
bgfx::destroyProgram(wbPass);
|
|
bgfx::destroyProgram(wbBlit);
|
|
bgfx::destroyUniform(u_texColor0);
|
|
bgfx::destroyUniform(u_texColor1);
|
|
bgfx::destroyUniform(u_color);
|
|
|
|
// Shutdown bgfx.
|
|
bgfx::shutdown();
|
|
|
|
return 0;
|
|
}
|