mirror of
https://github.com/scratchfoundation/bgfx.git
synced 2024-11-28 10:35:43 -05:00
337 lines
9.8 KiB
C++
337 lines
9.8 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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struct PosNormalTangentTexcoordVertex
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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_normal;
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uint32_t m_tangent;
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int16_t m_u;
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int16_t m_v;
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static void init()
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{
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ms_decl.begin();
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ms_decl.add(bgfx::Attrib::Position, 3, bgfx::AttribType::Float);
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ms_decl.add(bgfx::Attrib::Normal, 4, bgfx::AttribType::Uint8, true, true);
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ms_decl.add(bgfx::Attrib::Tangent, 4, bgfx::AttribType::Uint8, true, true);
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ms_decl.add(bgfx::Attrib::TexCoord0, 2, bgfx::AttribType::Int16, true, true);
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ms_decl.end();
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}
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static bgfx::VertexDecl ms_decl;
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};
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bgfx::VertexDecl PosNormalTangentTexcoordVertex::ms_decl;
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uint32_t packUint32(uint8_t _x, uint8_t _y, uint8_t _z, uint8_t _w)
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{
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union
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{
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uint32_t ui32;
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uint8_t arr[4];
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} un;
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un.arr[0] = _x;
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un.arr[1] = _y;
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un.arr[2] = _z;
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un.arr[3] = _w;
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return un.ui32;
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}
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uint32_t packF4u(float _x, float _y = 0.0f, float _z = 0.0f, float _w = 0.0f)
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{
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const uint8_t xx = uint8_t(_x*127.0f + 128.0f);
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const uint8_t yy = uint8_t(_y*127.0f + 128.0f);
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const uint8_t zz = uint8_t(_z*127.0f + 128.0f);
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const uint8_t ww = uint8_t(_w*127.0f + 128.0f);
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return packUint32(xx, yy, zz, ww);
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}
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static PosNormalTangentTexcoordVertex s_cubeVertices[24] =
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{
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{-1.0f, 1.0f, 1.0f, packF4u( 0.0f, 0.0f, 1.0f), 0, 0, 0 },
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{ 1.0f, 1.0f, 1.0f, packF4u( 0.0f, 0.0f, 1.0f), 0, 0x7fff, 0 },
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{-1.0f, -1.0f, 1.0f, packF4u( 0.0f, 0.0f, 1.0f), 0, 0, 0x7fff },
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{ 1.0f, -1.0f, 1.0f, packF4u( 0.0f, 0.0f, 1.0f), 0, 0x7fff, 0x7fff },
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{-1.0f, 1.0f, -1.0f, packF4u( 0.0f, 0.0f, -1.0f), 0, 0, 0 },
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{ 1.0f, 1.0f, -1.0f, packF4u( 0.0f, 0.0f, -1.0f), 0, 0x7fff, 0 },
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{-1.0f, -1.0f, -1.0f, packF4u( 0.0f, 0.0f, -1.0f), 0, 0, 0x7fff },
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{ 1.0f, -1.0f, -1.0f, packF4u( 0.0f, 0.0f, -1.0f), 0, 0x7fff, 0x7fff },
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{-1.0f, 1.0f, 1.0f, packF4u( 0.0f, 1.0f, 0.0f), 0, 0, 0 },
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{ 1.0f, 1.0f, 1.0f, packF4u( 0.0f, 1.0f, 0.0f), 0, 0x7fff, 0 },
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{-1.0f, 1.0f, -1.0f, packF4u( 0.0f, 1.0f, 0.0f), 0, 0, 0x7fff },
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{ 1.0f, 1.0f, -1.0f, packF4u( 0.0f, 1.0f, 0.0f), 0, 0x7fff, 0x7fff },
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{-1.0f, -1.0f, 1.0f, packF4u( 0.0f, -1.0f, 0.0f), 0, 0, 0 },
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{ 1.0f, -1.0f, 1.0f, packF4u( 0.0f, -1.0f, 0.0f), 0, 0x7fff, 0 },
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{-1.0f, -1.0f, -1.0f, packF4u( 0.0f, -1.0f, 0.0f), 0, 0, 0x7fff },
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{ 1.0f, -1.0f, -1.0f, packF4u( 0.0f, -1.0f, 0.0f), 0, 0x7fff, 0x7fff },
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{ 1.0f, -1.0f, 1.0f, packF4u( 1.0f, 0.0f, 0.0f), 0, 0, 0 },
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{ 1.0f, 1.0f, 1.0f, packF4u( 1.0f, 0.0f, 0.0f), 0, 0x7fff, 0 },
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{ 1.0f, -1.0f, -1.0f, packF4u( 1.0f, 0.0f, 0.0f), 0, 0, 0x7fff },
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{ 1.0f, 1.0f, -1.0f, packF4u( 1.0f, 0.0f, 0.0f), 0, 0x7fff, 0x7fff },
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{-1.0f, -1.0f, 1.0f, packF4u(-1.0f, 0.0f, 0.0f), 0, 0, 0 },
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{-1.0f, 1.0f, 1.0f, packF4u(-1.0f, 0.0f, 0.0f), 0, 0x7fff, 0 },
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{-1.0f, -1.0f, -1.0f, packF4u(-1.0f, 0.0f, 0.0f), 0, 0, 0x7fff },
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{-1.0f, 1.0f, -1.0f, packF4u(-1.0f, 0.0f, 0.0f), 0, 0x7fff, 0x7fff },
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};
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static const uint16_t s_cubeIndices[36] =
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{
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0, 2, 1,
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1, 2, 3,
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4, 5, 6,
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5, 7, 6,
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8, 10, 9,
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9, 10, 11,
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12, 13, 14,
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13, 15, 14,
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16, 18, 17,
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17, 18, 19,
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20, 21, 22,
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21, 23, 22,
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};
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int _main_(int /*_argc*/, char** /*_argv*/)
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{
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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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// Get renderer capabilities info.
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const bgfx::Caps* caps = bgfx::getCaps();
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bool instancingSupported = 0 != (caps->supported & BGFX_CAPS_INSTANCING);
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// Create vertex stream declaration.
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PosNormalTangentTexcoordVertex::init();
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calcTangents(s_cubeVertices
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, BX_COUNTOF(s_cubeVertices)
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, PosNormalTangentTexcoordVertex::ms_decl
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, s_cubeIndices
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, BX_COUNTOF(s_cubeIndices)
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);
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// Create static vertex buffer.
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bgfx::VertexBufferHandle vbh = bgfx::createVertexBuffer(
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bgfx::makeRef(s_cubeVertices, sizeof(s_cubeVertices) )
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, PosNormalTangentTexcoordVertex::ms_decl
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);
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// Create static index buffer.
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bgfx::IndexBufferHandle ibh = bgfx::createIndexBuffer(bgfx::makeRef(s_cubeIndices, sizeof(s_cubeIndices) ) );
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// Create texture sampler uniforms.
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bgfx::UniformHandle u_texColor = bgfx::createUniform("u_texColor", bgfx::UniformType::Uniform1iv);
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bgfx::UniformHandle u_texNormal = bgfx::createUniform("u_texNormal", bgfx::UniformType::Uniform1iv);
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uint16_t numLights = 4;
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bgfx::UniformHandle u_lightPosRadius = bgfx::createUniform("u_lightPosRadius", bgfx::UniformType::Uniform4fv, numLights);
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bgfx::UniformHandle u_lightRgbInnerR = bgfx::createUniform("u_lightRgbInnerR", bgfx::UniformType::Uniform4fv, numLights);
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// Create program from shaders.
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bgfx::ProgramHandle program = loadProgram(instancingSupported ? "vs_bump_instanced" : "vs_bump", "fs_bump");
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// Load diffuse texture.
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bgfx::TextureHandle textureColor = loadTexture("fieldstone-rgba.dds");
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// Load normal texture.
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bgfx::TextureHandle textureNormal = loadTexture("fieldstone-n.dds");
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int64_t timeOffset = bx::getHPCounter();
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while (!entry::processEvents(width, height, debug, reset) )
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{
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// Set view 0 default viewport.
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bgfx::setViewRect(0, 0, 0, width, 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::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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float time = (float)( (now-timeOffset)/freq);
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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/06-bump");
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bgfx::dbgTextPrintf(0, 2, 0x6f, "Description: Loading textures.");
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bgfx::dbgTextPrintf(0, 3, 0x0f, "Frame: % 7.3f[ms]", double(frameTime)*toMs);
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float at[3] = { 0.0f, 0.0f, 0.0f };
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float eye[3] = { 0.0f, 0.0f, -7.0f };
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float view[16];
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float proj[16];
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mtxLookAt(view, eye, at);
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mtxProj(proj, 60.0f, float(width)/float(height), 0.1f, 100.0f);
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float lightPosRadius[4][4];
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for (uint32_t ii = 0; ii < numLights; ++ii)
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{
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lightPosRadius[ii][0] = sin( (time*(0.1f + ii*0.17f) + float(ii*M_PI_2)*1.37f ) )*3.0f;
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lightPosRadius[ii][1] = cos( (time*(0.2f + ii*0.29f) + float(ii*M_PI_2)*1.49f ) )*3.0f;
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lightPosRadius[ii][2] = -2.5f;
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lightPosRadius[ii][3] = 3.0f;
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}
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bgfx::setUniform(u_lightPosRadius, lightPosRadius, numLights);
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float lightRgbInnerR[4][4] =
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{
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{ 1.0f, 0.7f, 0.2f, 0.8f },
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{ 0.7f, 0.2f, 1.0f, 0.8f },
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{ 0.2f, 1.0f, 0.7f, 0.8f },
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{ 1.0f, 0.4f, 0.2f, 0.8f },
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};
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bgfx::setUniform(u_lightRgbInnerR, lightRgbInnerR, numLights);
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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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const uint16_t instanceStride = 64;
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const uint16_t numInstances = 3;
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if (instancingSupported)
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{
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// Write instance data for 3x3 cubes.
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for (uint32_t yy = 0; yy < 3; ++yy)
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{
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const bgfx::InstanceDataBuffer* idb = bgfx::allocInstanceDataBuffer(numInstances, instanceStride);
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if (NULL != idb)
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{
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uint8_t* data = idb->data;
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for (uint32_t xx = 0; xx < 3; ++xx)
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{
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float* mtx = (float*)data;
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mtxRotateXY(mtx, time*0.023f + xx*0.21f, time*0.03f + yy*0.37f);
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mtx[12] = -3.0f + float(xx)*3.0f;
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mtx[13] = -3.0f + float(yy)*3.0f;
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mtx[14] = 0.0f;
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data += instanceStride;
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}
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// Set instance data buffer.
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bgfx::setInstanceDataBuffer(idb, numInstances);
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// Set vertex and fragment shaders.
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bgfx::setProgram(program);
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// Set vertex and index buffer.
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bgfx::setVertexBuffer(vbh);
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bgfx::setIndexBuffer(ibh);
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// Bind textures.
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bgfx::setTexture(0, u_texColor, textureColor);
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bgfx::setTexture(1, u_texNormal, textureNormal);
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// Set render states.
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bgfx::setState(0
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| BGFX_STATE_RGB_WRITE
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| BGFX_STATE_ALPHA_WRITE
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| BGFX_STATE_DEPTH_WRITE
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| BGFX_STATE_DEPTH_TEST_LESS
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| BGFX_STATE_MSAA
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);
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// Submit primitive for rendering to view 0.
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bgfx::submit(0);
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}
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}
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}
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else
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{
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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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float mtx[16];
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mtxRotateXY(mtx, time*0.023f + xx*0.21f, time*0.03f + yy*0.37f);
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mtx[12] = -3.0f + float(xx)*3.0f;
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mtx[13] = -3.0f + float(yy)*3.0f;
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mtx[14] = 0.0f;
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// Set transform for draw call.
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bgfx::setTransform(mtx);
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// Set vertex and fragment shaders.
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bgfx::setProgram(program);
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// Set vertex and index buffer.
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bgfx::setVertexBuffer(vbh);
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bgfx::setIndexBuffer(ibh);
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// Bind textures.
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bgfx::setTexture(0, u_texColor, textureColor);
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bgfx::setTexture(1, u_texNormal, textureNormal);
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// Set render states.
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bgfx::setState(0
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| BGFX_STATE_RGB_WRITE
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| BGFX_STATE_ALPHA_WRITE
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| BGFX_STATE_DEPTH_WRITE
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| BGFX_STATE_DEPTH_TEST_LESS
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| BGFX_STATE_MSAA
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);
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// Submit primitive for rendering to view 0.
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bgfx::submit(0);
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}
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}
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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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}
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// Cleanup.
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bgfx::destroyIndexBuffer(ibh);
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bgfx::destroyVertexBuffer(vbh);
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bgfx::destroyProgram(program);
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bgfx::destroyTexture(textureColor);
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bgfx::destroyTexture(textureNormal);
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bgfx::destroyUniform(u_texColor);
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bgfx::destroyUniform(u_texNormal);
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bgfx::destroyUniform(u_lightPosRadius);
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bgfx::destroyUniform(u_lightRgbInnerR);
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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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