aiden/video-shader-toys
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Render timing

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Aiden
2026-05-12 22:18:27 +10:00
parent 13586c611a
commit 4a049a557a
15 changed files with 260 additions and 24 deletions
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20
apps/RenderCadenceCompositor/render/readback/Bgra8ReadbackPipeline.cpp
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@@ -2,8 +2,18 @@
#include "../frames/SystemFrameTypes.h"
#include <chrono>
#include <cstring>
namespace
{
double MillisecondsSince(std::chrono::steady_clock::time_point start)
{
return std::chrono::duration_cast<std::chrono::duration<double, std::milli>>(
std::chrono::steady_clock::now() - start).count();
}
}
Bgra8ReadbackPipeline::~Bgra8ReadbackPipeline()
{
Shutdown();
@@ -50,10 +60,15 @@ bool Bgra8ReadbackPipeline::RenderAndQueue(uint64_t frameIndex, const RenderCall
return false;
glBindFramebuffer(GL_FRAMEBUFFER, mFramebuffer);
const auto renderStart = std::chrono::steady_clock::now();
renderFrame(frameIndex);
mLastRenderFrameMilliseconds = MillisecondsSince(renderStart);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
return mPboRing.QueueReadback(mFramebuffer, mWidth, mHeight, frameIndex);
const auto queueStart = std::chrono::steady_clock::now();
const bool queued = mPboRing.QueueReadback(mFramebuffer, mWidth, mHeight, frameIndex);
mLastReadbackQueueMilliseconds = MillisecondsSince(queueStart);
return queued;
}
void Bgra8ReadbackPipeline::ConsumeCompleted(
@@ -68,12 +83,14 @@ void Bgra8ReadbackPipeline::ConsumeCompleted(
PboReadbackRing::CompletedReadback readback;
while (mPboRing.TryAcquireCompleted(readback))
{
const auto copyStart = std::chrono::steady_clock::now();
glBindBuffer(GL_PIXEL_PACK_BUFFER, readback.pbo);
void* mapped = glMapBuffer(GL_PIXEL_PACK_BUFFER, GL_READ_ONLY);
if (!mapped)
{
glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
mPboRing.ReleaseCompleted(readback);
mLastCompletedReadbackCopyMilliseconds = MillisecondsSince(copyStart);
continue;
}
@@ -99,6 +116,7 @@ void Bgra8ReadbackPipeline::ConsumeCompleted(
glUnmapBuffer(GL_PIXEL_PACK_BUFFER);
glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
mPboRing.ReleaseCompleted(readback);
mLastCompletedReadbackCopyMilliseconds = MillisecondsSince(copyStart);
}
}

6
apps/RenderCadenceCompositor/render/readback/Bgra8ReadbackPipeline.h
View File

@@ -38,6 +38,9 @@ public:
unsigned RowBytes() const { return mRowBytes; }
VideoIOPixelFormat PixelFormat() const { return VideoIOPixelFormat::Bgra8; }
uint64_t PboQueueMisses() const { return mPboRing.QueueMisses(); }
double LastRenderFrameMilliseconds() const { return mLastRenderFrameMilliseconds; }
double LastReadbackQueueMilliseconds() const { return mLastReadbackQueueMilliseconds; }
double LastCompletedReadbackCopyMilliseconds() const { return mLastCompletedReadbackCopyMilliseconds; }
private:
bool CreateRenderTarget();
@@ -48,5 +51,8 @@ private:
unsigned mRowBytes = 0;
GLuint mFramebuffer = 0;
GLuint mTexture = 0;
double mLastRenderFrameMilliseconds = 0.0;
double mLastReadbackQueueMilliseconds = 0.0;
double mLastCompletedReadbackCopyMilliseconds = 0.0;
PboReadbackRing mPboRing;
};