mirror of
https://github.com/scratchfoundation/bgfx.git
synced 2024-11-25 00:58:30 -05:00
484 lines
14 KiB
C++
484 lines
14 KiB
C++
/*
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* Copyright 2011-2014 Branimir Karadzic. All rights reserved.
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* License: http://www.opensource.org/licenses/BSD-2-Clause
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*/
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#include "common.h"
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#include "bgfx_utils.h"
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#include "imgui/imgui.h"
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static float s_texelHalf = 0.0f;
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static bool s_originBottomLeft = false;
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inline void mtxProj(float* _result, float _fovy, float _aspect, float _near, float _far)
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{
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bx::mtxProj(_result, _fovy, _aspect, _near, _far, s_originBottomLeft);
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}
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struct PosColorTexCoord0Vertex
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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_rgba;
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float m_u;
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float m_v;
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static void init()
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{
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ms_decl
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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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.add(bgfx::Attrib::TexCoord0, 2, bgfx::AttribType::Float)
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.end();
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}
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static bgfx::VertexDecl ms_decl;
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};
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bgfx::VertexDecl PosColorTexCoord0Vertex::ms_decl;
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void screenSpaceQuad(float _textureWidth, float _textureHeight, bool _originBottomLeft = false, float _width = 1.0f, float _height = 1.0f)
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{
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if (bgfx::checkAvailTransientVertexBuffer(3, PosColorTexCoord0Vertex::ms_decl) )
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{
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bgfx::TransientVertexBuffer vb;
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bgfx::allocTransientVertexBuffer(&vb, 3, PosColorTexCoord0Vertex::ms_decl);
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PosColorTexCoord0Vertex* vertex = (PosColorTexCoord0Vertex*)vb.data;
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const float zz = 0.0f;
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const float minx = -_width;
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const float maxx = _width;
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const float miny = 0.0f;
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const float maxy = _height*2.0f;
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const float texelHalfW = s_texelHalf/_textureWidth;
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const float texelHalfH = s_texelHalf/_textureHeight;
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const float minu = -1.0f + texelHalfW;
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const float maxu = 1.0f + texelHalfW;
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float minv = texelHalfH;
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float maxv = 2.0f + texelHalfH;
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if (_originBottomLeft)
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{
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float temp = minv;
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minv = maxv;
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maxv = temp;
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minv -= 1.0f;
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maxv -= 1.0f;
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}
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vertex[0].m_x = minx;
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vertex[0].m_y = miny;
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vertex[0].m_z = zz;
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vertex[0].m_rgba = 0xffffffff;
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vertex[0].m_u = minu;
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vertex[0].m_v = minv;
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vertex[1].m_x = maxx;
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vertex[1].m_y = miny;
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vertex[1].m_z = zz;
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vertex[1].m_rgba = 0xffffffff;
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vertex[1].m_u = maxu;
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vertex[1].m_v = minv;
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vertex[2].m_x = maxx;
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vertex[2].m_y = maxy;
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vertex[2].m_z = zz;
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vertex[2].m_rgba = 0xffffffff;
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vertex[2].m_u = maxu;
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vertex[2].m_v = maxv;
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bgfx::setVertexBuffer(&vb);
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}
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}
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void setOffsets2x2Lum(bgfx::UniformHandle _handle, uint32_t _width, uint32_t _height)
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{
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float offsets[16][4];
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float du = 1.0f/_width;
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float dv = 1.0f/_height;
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uint32_t num = 0;
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for (uint32_t yy = 0; yy < 3; ++yy)
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{
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for (uint32_t xx = 0; xx < 3; ++xx)
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{
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offsets[num][0] = (xx - s_texelHalf) * du;
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offsets[num][1] = (yy - s_texelHalf) * dv;
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++num;
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}
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}
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bgfx::setUniform(_handle, offsets, num);
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}
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void setOffsets4x4Lum(bgfx::UniformHandle _handle, uint32_t _width, uint32_t _height)
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{
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float offsets[16][4];
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float du = 1.0f/_width;
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float dv = 1.0f/_height;
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uint32_t num = 0;
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for (uint32_t yy = 0; yy < 4; ++yy)
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{
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for (uint32_t xx = 0; xx < 4; ++xx)
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{
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offsets[num][0] = (xx - 1.0f - s_texelHalf) * du;
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offsets[num][1] = (yy - 1.0f - s_texelHalf) * dv;
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++num;
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}
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}
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bgfx::setUniform(_handle, offsets, num);
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}
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inline float square(float _x)
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{
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return _x*_x;
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}
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int _main_(int /*_argc*/, char** /*_argv*/)
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{
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PosColorTexCoord0Vertex::init();
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uint32_t width = 1280;
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uint32_t height = 720;
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uint32_t debug = BGFX_DEBUG_TEXT;
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uint32_t reset = BGFX_RESET_VSYNC;
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bgfx::init();
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bgfx::reset(width, height, reset);
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// Enable debug text.
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bgfx::setDebug(debug);
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// Set view 0 clear state.
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bgfx::setViewClear(0
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, BGFX_CLEAR_COLOR_BIT|BGFX_CLEAR_DEPTH_BIT
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, 0x303030ff
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, 1.0f
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, 0
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);
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bgfx::TextureHandle uffizi = loadTexture("uffizi.dds", BGFX_TEXTURE_U_CLAMP|BGFX_TEXTURE_V_CLAMP|BGFX_TEXTURE_W_CLAMP);
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bgfx::ProgramHandle skyProgram = loadProgram("vs_hdr_skybox", "fs_hdr_skybox");
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bgfx::ProgramHandle lumProgram = loadProgram("vs_hdr_lum", "fs_hdr_lum");
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bgfx::ProgramHandle lumAvgProgram = loadProgram("vs_hdr_lumavg", "fs_hdr_lumavg");
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bgfx::ProgramHandle blurProgram = loadProgram("vs_hdr_blur", "fs_hdr_blur");
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bgfx::ProgramHandle brightProgram = loadProgram("vs_hdr_bright", "fs_hdr_bright");
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bgfx::ProgramHandle meshProgram = loadProgram("vs_hdr_mesh", "fs_hdr_mesh");
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bgfx::ProgramHandle tonemapProgram = loadProgram("vs_hdr_tonemap", "fs_hdr_tonemap");
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bgfx::UniformHandle u_time = bgfx::createUniform("u_time", bgfx::UniformType::Uniform1f);
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bgfx::UniformHandle u_texCube = bgfx::createUniform("u_texCube", bgfx::UniformType::Uniform1i);
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bgfx::UniformHandle u_texColor = bgfx::createUniform("u_texColor", bgfx::UniformType::Uniform1i);
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bgfx::UniformHandle u_texLum = bgfx::createUniform("u_texLum", bgfx::UniformType::Uniform1i);
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bgfx::UniformHandle u_texBlur = bgfx::createUniform("u_texBlur", bgfx::UniformType::Uniform1i);
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bgfx::UniformHandle u_mtx = bgfx::createUniform("u_mtx", bgfx::UniformType::Uniform4x4fv);
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bgfx::UniformHandle u_tonemap = bgfx::createUniform("u_tonemap", bgfx::UniformType::Uniform4fv);
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bgfx::UniformHandle u_offset = bgfx::createUniform("u_offset", bgfx::UniformType::Uniform4fv, 16);
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Mesh* mesh = meshLoad("meshes/bunny.bin");
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bgfx::FrameBufferHandle fbh;
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bgfx::TextureHandle fbtextures[] =
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{
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bgfx::createTexture2D(width, height, 1, bgfx::TextureFormat::BGRA8, BGFX_TEXTURE_RT|BGFX_TEXTURE_U_CLAMP|BGFX_TEXTURE_V_CLAMP),
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bgfx::createTexture2D(width, height, 1, bgfx::TextureFormat::D16, BGFX_TEXTURE_RT_BUFFER_ONLY),
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};
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fbh = bgfx::createFrameBuffer(BX_COUNTOF(fbtextures), fbtextures, true);
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bgfx::FrameBufferHandle lum[5];
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lum[0] = bgfx::createFrameBuffer(128, 128, bgfx::TextureFormat::BGRA8);
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lum[1] = bgfx::createFrameBuffer( 64, 64, bgfx::TextureFormat::BGRA8);
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lum[2] = bgfx::createFrameBuffer( 16, 16, bgfx::TextureFormat::BGRA8);
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lum[3] = bgfx::createFrameBuffer( 4, 4, bgfx::TextureFormat::BGRA8);
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lum[4] = bgfx::createFrameBuffer( 1, 1, bgfx::TextureFormat::BGRA8);
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bgfx::FrameBufferHandle bright;
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bright = bgfx::createFrameBuffer(width/2, height/2, bgfx::TextureFormat::BGRA8);
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bgfx::FrameBufferHandle blur;
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blur = bgfx::createFrameBuffer(width/8, height/8, bgfx::TextureFormat::BGRA8);
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void* data = load("font/droidsans.ttf");
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imguiCreate(data);
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free(data);
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const bgfx::RendererType::Enum renderer = bgfx::getRendererType();
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s_texelHalf = bgfx::RendererType::Direct3D9 == renderer ? 0.5f : 0.0f;
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s_originBottomLeft = bgfx::RendererType::OpenGL == renderer || bgfx::RendererType::OpenGLES == renderer;
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uint32_t oldWidth = 0;
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uint32_t oldHeight = 0;
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uint32_t oldReset = reset;
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float speed = 0.37f;
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float middleGray = 0.18f;
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float white = 1.1f;
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float treshold = 1.5f;
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int32_t scrollArea = 0;
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float time = 0.0f;
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entry::MouseState mouseState;
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while (!entry::processEvents(width, height, debug, reset, &mouseState) )
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{
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if (oldWidth != width
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|| oldHeight != height
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|| oldReset != reset)
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{
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// Recreate variable size render targets when resolution changes.
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oldWidth = width;
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oldHeight = height;
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oldReset = reset;
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uint32_t msaa = (reset&BGFX_RESET_MSAA_MASK)>>BGFX_RESET_MSAA_SHIFT;
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bgfx::destroyFrameBuffer(fbh);
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bgfx::destroyFrameBuffer(bright);
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bgfx::destroyFrameBuffer(blur);
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fbtextures[0] = bgfx::createTexture2D(width, height, 1, bgfx::TextureFormat::BGRA8, ( (msaa+1)<<BGFX_TEXTURE_RT_MSAA_SHIFT)|BGFX_TEXTURE_U_CLAMP|BGFX_TEXTURE_V_CLAMP);
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fbtextures[1] = bgfx::createTexture2D(width, height, 1, bgfx::TextureFormat::D16, BGFX_TEXTURE_RT_BUFFER_ONLY|( (msaa+1)<<BGFX_TEXTURE_RT_MSAA_SHIFT) );
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fbh = bgfx::createFrameBuffer(BX_COUNTOF(fbtextures), fbtextures, true);
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bright = bgfx::createFrameBuffer(width/2, height/2, bgfx::TextureFormat::BGRA8);
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blur = bgfx::createFrameBuffer(width/8, height/8, bgfx::TextureFormat::BGRA8);
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}
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imguiBeginFrame(mouseState.m_mx
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, mouseState.m_my
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, (mouseState.m_buttons[entry::MouseButton::Left ] ? IMGUI_MBUT_LEFT : 0)
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| (mouseState.m_buttons[entry::MouseButton::Right ] ? IMGUI_MBUT_RIGHT : 0)
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, 0
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, width
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, height
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);
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imguiBeginScrollArea("Settings", width - width / 5 - 10, 10, width / 5, height / 3, &scrollArea);
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imguiSeparatorLine();
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imguiSlider("Speed", speed, 0.0f, 1.0f, 0.01f);
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imguiSeparator();
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imguiSlider("Middle gray", middleGray, 0.1f, 1.0f, 0.01f);
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imguiSlider("White point", white, 0.1f, 2.0f, 0.01f);
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imguiSlider("Treshold", treshold, 0.1f, 2.0f, 0.01f);
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imguiEndScrollArea();
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imguiEndFrame();
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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::submit(0);
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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 frameTime = now - last;
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last = now;
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const double freq = double(bx::getHPFrequency() );
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const double toMs = 1000.0/freq;
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time += (float)(frameTime*speed/freq);
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bgfx::setUniform(u_time, &time);
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// Use debug font to print information about this example.
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bgfx::dbgTextClear();
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bgfx::dbgTextPrintf(0, 1, 0x4f, "bgfx/examples/09-hdr");
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bgfx::dbgTextPrintf(0, 2, 0x6f, "Description: Using multiple views and render targets.");
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bgfx::dbgTextPrintf(0, 3, 0x0f, "Frame: % 7.3f[ms]", double(frameTime)*toMs);
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// Set views.
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for (uint32_t ii = 0; ii < 6; ++ii)
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{
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bgfx::setViewRect(ii, 0, 0, width, height);
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}
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bgfx::setViewFrameBuffer(0, fbh);
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bgfx::setViewFrameBuffer(1, fbh);
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bgfx::setViewRect(2, 0, 0, 128, 128);
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bgfx::setViewFrameBuffer(2, lum[0]);
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bgfx::setViewRect(3, 0, 0, 64, 64);
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bgfx::setViewFrameBuffer(3, lum[1]);
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bgfx::setViewRect(4, 0, 0, 16, 16);
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bgfx::setViewFrameBuffer(4, lum[2]);
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bgfx::setViewRect(5, 0, 0, 4, 4);
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bgfx::setViewFrameBuffer(5, lum[3]);
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bgfx::setViewRect(6, 0, 0, 1, 1);
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bgfx::setViewFrameBuffer(6, lum[4]);
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bgfx::setViewRect(7, 0, 0, width/2, height/2);
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bgfx::setViewFrameBuffer(7, bright);
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bgfx::setViewRect(8, 0, 0, width/8, height/8);
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bgfx::setViewFrameBuffer(8, blur);
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bgfx::setViewRect(9, 0, 0, width, height);
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float view[16];
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float proj[16];
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bx::mtxIdentity(view);
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bx::mtxOrtho(proj, 0.0f, 1.0f, 1.0f, 0.0f, 0.0f, 100.0f);
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// Set view and projection matrix for view 0.
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for (uint32_t ii = 0; ii < 10; ++ii)
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{
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bgfx::setViewTransform(ii, view, proj);
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}
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float at[3] = { 0.0f, 1.0f, 0.0f };
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float eye[3] = { 0.0f, 1.0f, -2.5f };
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float mtx[16];
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bx::mtxRotateXY(mtx
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, 0.0f
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, time
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);
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float temp[4];
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bx::vec3MulMtx(temp, eye, mtx);
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bx::mtxLookAt(view, temp, at);
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bx::mtxProj(proj, 60.0f, float(width)/float(height), 0.1f, 100.0f);
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// Set view and projection matrix for view 1.
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bgfx::setViewTransform(1, view, proj);
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bgfx::setUniform(u_mtx, mtx);
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// Render skybox into view 0.
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bgfx::setTexture(0, u_texCube, uffizi);
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bgfx::setProgram(skyProgram);
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bgfx::setState(BGFX_STATE_RGB_WRITE|BGFX_STATE_ALPHA_WRITE);
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screenSpaceQuad( (float)width, (float)height, true);
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bgfx::submit(0);
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// Render mesh into view 1
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bgfx::setTexture(0, u_texCube, uffizi);
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meshSubmit(mesh, 1, meshProgram, NULL);
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// Calculate luminance.
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setOffsets2x2Lum(u_offset, 128, 128);
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bgfx::setTexture(0, u_texColor, fbtextures[0]);
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bgfx::setProgram(lumProgram);
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bgfx::setState(BGFX_STATE_RGB_WRITE|BGFX_STATE_ALPHA_WRITE);
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screenSpaceQuad(128.0f, 128.0f, s_originBottomLeft);
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bgfx::submit(2);
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// Downscale luminance 0.
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setOffsets4x4Lum(u_offset, 128, 128);
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bgfx::setTexture(0, u_texColor, lum[0]);
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bgfx::setProgram(lumAvgProgram);
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bgfx::setState(BGFX_STATE_RGB_WRITE|BGFX_STATE_ALPHA_WRITE);
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screenSpaceQuad(64.0f, 64.0f, s_originBottomLeft);
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bgfx::submit(3);
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// Downscale luminance 1.
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setOffsets4x4Lum(u_offset, 64, 64);
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bgfx::setTexture(0, u_texColor, lum[1]);
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bgfx::setProgram(lumAvgProgram);
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bgfx::setState(BGFX_STATE_RGB_WRITE|BGFX_STATE_ALPHA_WRITE);
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screenSpaceQuad(16.0f, 16.0f, s_originBottomLeft);
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bgfx::submit(4);
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// Downscale luminance 2.
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setOffsets4x4Lum(u_offset, 16, 16);
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bgfx::setTexture(0, u_texColor, lum[2]);
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bgfx::setProgram(lumAvgProgram);
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bgfx::setState(BGFX_STATE_RGB_WRITE|BGFX_STATE_ALPHA_WRITE);
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screenSpaceQuad(4.0f, 4.0f, s_originBottomLeft);
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bgfx::submit(5);
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// Downscale luminance 3.
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setOffsets4x4Lum(u_offset, 4, 4);
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bgfx::setTexture(0, u_texColor, lum[3]);
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bgfx::setProgram(lumAvgProgram);
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bgfx::setState(BGFX_STATE_RGB_WRITE|BGFX_STATE_ALPHA_WRITE);
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screenSpaceQuad(1.0f, 1.0f, s_originBottomLeft);
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bgfx::submit(6);
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float tonemap[4] = { middleGray, square(white), treshold, 0.0f };
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bgfx::setUniform(u_tonemap, tonemap);
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// Bright pass treshold is tonemap[3].
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setOffsets4x4Lum(u_offset, width/2, height/2);
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bgfx::setTexture(0, u_texColor, fbtextures[0]);
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bgfx::setTexture(1, u_texLum, lum[4]);
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bgfx::setProgram(brightProgram);
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bgfx::setState(BGFX_STATE_RGB_WRITE|BGFX_STATE_ALPHA_WRITE);
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screenSpaceQuad( (float)width/2.0f, (float)height/2.0f, s_originBottomLeft);
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bgfx::submit(7);
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// Blur bright pass vertically.
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bgfx::setTexture(0, u_texColor, bright);
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bgfx::setProgram(blurProgram);
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bgfx::setState(BGFX_STATE_RGB_WRITE|BGFX_STATE_ALPHA_WRITE);
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screenSpaceQuad( (float)width/8.0f, (float)height/8.0f, s_originBottomLeft);
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bgfx::submit(8);
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// Blur bright pass horizontally, do tonemaping and combine.
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bgfx::setTexture(0, u_texColor, fbtextures[0]);
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bgfx::setTexture(1, u_texLum, lum[4]);
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bgfx::setTexture(2, u_texBlur, blur);
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bgfx::setProgram(tonemapProgram);
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bgfx::setState(BGFX_STATE_RGB_WRITE|BGFX_STATE_ALPHA_WRITE);
|
|
screenSpaceQuad( (float)width, (float)height, s_originBottomLeft);
|
|
bgfx::submit(9);
|
|
|
|
// Advance to next frame. Rendering thread will be kicked to
|
|
// process submitted rendering primitives.
|
|
bgfx::frame();
|
|
}
|
|
|
|
// Cleanup.
|
|
imguiDestroy();
|
|
|
|
meshUnload(mesh);
|
|
|
|
for (uint32_t ii = 0; ii < BX_COUNTOF(lum); ++ii)
|
|
{
|
|
bgfx::destroyFrameBuffer(lum[ii]);
|
|
}
|
|
bgfx::destroyFrameBuffer(bright);
|
|
bgfx::destroyFrameBuffer(blur);
|
|
bgfx::destroyFrameBuffer(fbh);
|
|
|
|
bgfx::destroyProgram(meshProgram);
|
|
bgfx::destroyProgram(skyProgram);
|
|
bgfx::destroyProgram(tonemapProgram);
|
|
bgfx::destroyProgram(lumProgram);
|
|
bgfx::destroyProgram(lumAvgProgram);
|
|
bgfx::destroyProgram(blurProgram);
|
|
bgfx::destroyProgram(brightProgram);
|
|
bgfx::destroyTexture(uffizi);
|
|
|
|
bgfx::destroyUniform(u_time);
|
|
bgfx::destroyUniform(u_texCube);
|
|
bgfx::destroyUniform(u_texColor);
|
|
bgfx::destroyUniform(u_texLum);
|
|
bgfx::destroyUniform(u_texBlur);
|
|
bgfx::destroyUniform(u_mtx);
|
|
bgfx::destroyUniform(u_tonemap);
|
|
bgfx::destroyUniform(u_offset);
|
|
|
|
// Shutdown bgfx.
|
|
bgfx::shutdown();
|
|
|
|
return 0;
|
|
}
|