diff options
author | 2021-08-10 20:28:56 +0200 | |
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committer | 2021-08-10 20:28:56 +0200 | |
commit | 1a6a018fc3b393e6f769d7db3aea397175aba459 (patch) | |
tree | 1fd0418f1044b221537c682e3e7f02a4a2a72af2 /3rdparty/bgfx/examples/05-instancing/instancing.cpp | |
parent | 702c9b45cc3a0d3eaaf29cd595b7e3511316a348 (diff) |
Update bgfx to latest
Diffstat (limited to '3rdparty/bgfx/examples/05-instancing/instancing.cpp')
-rw-r--r-- | 3rdparty/bgfx/examples/05-instancing/instancing.cpp | 188 |
1 files changed, 135 insertions, 53 deletions
diff --git a/3rdparty/bgfx/examples/05-instancing/instancing.cpp b/3rdparty/bgfx/examples/05-instancing/instancing.cpp index 83c78e49c1a..ae80d11b304 100644 --- a/3rdparty/bgfx/examples/05-instancing/instancing.cpp +++ b/3rdparty/bgfx/examples/05-instancing/instancing.cpp @@ -1,5 +1,5 @@ /* - * Copyright 2011-2019 Branimir Karadzic. All rights reserved. + * Copyright 2011-2021 Branimir Karadzic. All rights reserved. * License: https://github.com/bkaradzic/bgfx#license-bsd-2-clause */ @@ -75,6 +75,9 @@ public: m_height = _height; m_debug = BGFX_DEBUG_TEXT; m_reset = BGFX_RESET_VSYNC; + m_useInstancing = true; + m_lastFrameMissing = 0; + m_sideSize = 11; bgfx::Init init; init.type = args.m_type; @@ -111,6 +114,7 @@ public: // Create program from shaders. m_program = loadProgram("vs_instancing", "fs_instancing"); + m_program_non_instanced = loadProgram("vs_cubes", "fs_cubes"); m_timeOffset = bx::getHPCounter(); @@ -125,6 +129,7 @@ public: bgfx::destroy(m_ibh); bgfx::destroy(m_vbh); bgfx::destroy(m_program); + bgfx::destroy(m_program_non_instanced); // Shutdown bgfx. bgfx::shutdown(); @@ -148,6 +153,47 @@ public: showExampleDialog(this); + ImGui::SetNextWindowPos( + ImVec2(m_width - m_width / 5.0f - 10.0f, 10.0f) + , ImGuiCond_FirstUseEver + ); + ImGui::SetNextWindowSize( + ImVec2(m_width / 5.0f, m_height / 2.0f) + , ImGuiCond_FirstUseEver + ); + ImGui::Begin("Settings" + , NULL + , 0 + ); + + // Get renderer capabilities info. + const bgfx::Caps* caps = bgfx::getCaps(); + + // Check if instancing is supported. + const bool instancingSupported = 0 != (BGFX_CAPS_INSTANCING & caps->supported); + m_useInstancing &= instancingSupported; + + ImGui::Text("%d draw calls", bgfx::getStats()->numDraw); + + ImGui::PushEnabled(instancingSupported); + ImGui::Checkbox("Use Instancing", &m_useInstancing); + ImGui::PopEnabled(); + + ImGui::Text("Grid Side Size:"); + ImGui::SliderInt("", (int*)&m_sideSize, 1, 512); + + if (m_lastFrameMissing > 0) + { + ImGui::TextColored(ImVec4(1.0f, 0.0f, 0.0f, 1.0f), "Couldn't draw %d cubes last frame", m_lastFrameMissing); + } + + if (bgfx::getStats()->numDraw >= bgfx::getCaps()->limits.maxDrawCalls) + { + ImGui::TextColored(ImVec4(1.0f, 0.0f, 0.0f, 1.0f), "Draw call limit reached!"); + } + + ImGui::End(); + imguiEndFrame(); // Set view 0 default viewport. @@ -159,80 +205,111 @@ public: float time = (float)( (bx::getHPCounter() - m_timeOffset)/double(bx::getHPFrequency() ) ); - // Get renderer capabilities info. - const bgfx::Caps* caps = bgfx::getCaps(); - - // Check if instancing is supported. - if (0 == (BGFX_CAPS_INSTANCING & caps->supported) ) + if (!instancingSupported) { // When instancing is not supported by GPU, implement alternative // code path that doesn't use instancing. bool blink = uint32_t(time*3.0f)&1; bgfx::dbgTextPrintf(0, 0, blink ? 0x4f : 0x04, " Instancing is not supported by GPU. "); + + m_useInstancing = false; } - else + + const bx::Vec3 at = { 0.0f, 0.0f, 0.0f }; + const bx::Vec3 eye = { 0.0f, 0.0f, -35.0f }; + + // Set view and projection matrix for view 0. { - const bx::Vec3 at = { 0.0f, 0.0f, 0.0f }; - const bx::Vec3 eye = { 0.0f, 0.0f, -35.0f }; + float view[16]; + bx::mtxLookAt(view, eye, at); - // Set view and projection matrix for view 0. - { - float view[16]; - bx::mtxLookAt(view, eye, at); + float proj[16]; + bx::mtxProj(proj, 60.0f, float(m_width)/float(m_height), 0.1f, 100.0f, bgfx::getCaps()->homogeneousDepth); + bgfx::setViewTransform(0, view, proj); - float proj[16]; - bx::mtxProj(proj, 60.0f, float(m_width)/float(m_height), 0.1f, 100.0f, bgfx::getCaps()->homogeneousDepth); - bgfx::setViewTransform(0, view, proj); + // Set view 0 default viewport. + bgfx::setViewRect(0, 0, 0, uint16_t(m_width), uint16_t(m_height) ); + } - // Set view 0 default viewport. - bgfx::setViewRect(0, 0, 0, uint16_t(m_width), uint16_t(m_height) ); - } + m_lastFrameMissing = 0; + if (m_useInstancing) + { // 80 bytes stride = 64 bytes for 4x4 matrix + 16 bytes for RGBA color. const uint16_t instanceStride = 80; - // 11x11 cubes - const uint32_t numInstances = 121; + // to total number of instances to draw + uint32_t totalCubes = m_sideSize * m_sideSize; + + // figure out how big of a buffer is available + uint32_t drawnCubes = bgfx::getAvailInstanceDataBuffer(totalCubes, instanceStride); + + // save how many we couldn't draw due to buffer room so we can display it + m_lastFrameMissing = totalCubes - drawnCubes; + + bgfx::InstanceDataBuffer idb; + bgfx::allocInstanceDataBuffer(&idb, drawnCubes, instanceStride); - if (numInstances == bgfx::getAvailInstanceDataBuffer(numInstances, instanceStride) ) + uint8_t* data = idb.data; + + for (uint32_t ii = 0; ii < drawnCubes; ++ii) { - bgfx::InstanceDataBuffer idb; - bgfx::allocInstanceDataBuffer(&idb, numInstances, instanceStride); + uint32_t yy = ii / m_sideSize; + uint32_t xx = ii % m_sideSize; + + float* mtx = (float*)data; + bx::mtxRotateXY(mtx, time + xx * 0.21f, time + yy * 0.37f); + mtx[12] = -15.0f + float(xx) * 3.0f; + mtx[13] = -15.0f + float(yy) * 3.0f; + mtx[14] = 0.0f; + + float* color = (float*)&data[64]; + color[0] = bx::sin(time + float(xx) / 11.0f) * 0.5f + 0.5f; + color[1] = bx::cos(time + float(yy) / 11.0f) * 0.5f + 0.5f; + color[2] = bx::sin(time * 3.0f) * 0.5f + 0.5f; + color[3] = 1.0f; + + data += instanceStride; + } + + // Set vertex and index buffer. + bgfx::setVertexBuffer(0, m_vbh); + bgfx::setIndexBuffer(m_ibh); - uint8_t* data = idb.data; + // Set instance data buffer. + bgfx::setInstanceDataBuffer(&idb); - // Write instance data for 11x11 cubes. - for (uint32_t yy = 0; yy < 11; ++yy) + // Set render states. + bgfx::setState(BGFX_STATE_DEFAULT); + + // Submit primitive for rendering to view 0. + bgfx::submit(0, m_program); + } + else + { + // non-instanced path + for (uint32_t yy = 0; yy < m_sideSize; ++yy) + { + for (uint32_t xx = 0; xx < m_sideSize; ++xx) { - for (uint32_t xx = 0; xx < 11; ++xx) - { - float* mtx = (float*)data; - bx::mtxRotateXY(mtx, time + xx*0.21f, time + yy*0.37f); - mtx[12] = -15.0f + float(xx)*3.0f; - mtx[13] = -15.0f + float(yy)*3.0f; - mtx[14] = 0.0f; - - float* color = (float*)&data[64]; - color[0] = bx::sin(time+float(xx)/11.0f)*0.5f+0.5f; - color[1] = bx::cos(time+float(yy)/11.0f)*0.5f+0.5f; - color[2] = bx::sin(time*3.0f)*0.5f+0.5f; - color[3] = 1.0f; - - data += instanceStride; - } - } + float mtx[16]; + bx::mtxRotateXY(mtx, time + xx * 0.21f, time + yy * 0.37f); + mtx[12] = -15.0f + float(xx) * 3.0f; + mtx[13] = -15.0f + float(yy) * 3.0f; + mtx[14] = 0.0f; - // Set vertex and index buffer. - bgfx::setVertexBuffer(0, m_vbh); - bgfx::setIndexBuffer(m_ibh); + // Set model matrix for rendering. + bgfx::setTransform(mtx); - // Set instance data buffer. - bgfx::setInstanceDataBuffer(&idb); + // Set vertex and index buffer. + bgfx::setVertexBuffer(0, m_vbh); + bgfx::setIndexBuffer(m_ibh); - // Set render states. - bgfx::setState(BGFX_STATE_DEFAULT); + // Set render states. + bgfx::setState(BGFX_STATE_DEFAULT); - // Submit primitive for rendering to view 0. - bgfx::submit(0, m_program); + // Submit primitive for rendering to view 0. + bgfx::submit(0, m_program_non_instanced); + } } } @@ -252,9 +329,14 @@ public: uint32_t m_height; uint32_t m_debug; uint32_t m_reset; + bool m_useInstancing; + uint32_t m_lastFrameMissing; + uint32_t m_sideSize; + bgfx::VertexBufferHandle m_vbh; bgfx::IndexBufferHandle m_ibh; bgfx::ProgramHandle m_program; + bgfx::ProgramHandle m_program_non_instanced; int64_t m_timeOffset; }; |