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author Бранимир Караџић <branimirkaradzic@gmail.com>2021-08-10 20:28:56 +0200
committer Miodrag Milanovic <mmicko@gmail.com>2021-08-10 20:28:56 +0200
commit1a6a018fc3b393e6f769d7db3aea397175aba459 (patch)
tree1fd0418f1044b221537c682e3e7f02a4a2a72af2 /3rdparty/bgfx/examples/05-instancing/instancing.cpp
parent702c9b45cc3a0d3eaaf29cd595b7e3511316a348 (diff)
Update bgfx to latest
Diffstat (limited to '3rdparty/bgfx/examples/05-instancing/instancing.cpp')
-rw-r--r--3rdparty/bgfx/examples/05-instancing/instancing.cpp188
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;
};