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Splitting out rendering

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Aiden
2026-05-08 16:33:55 +10:00
parent ebbc11bb34
commit 3eb5bb5de3
9 changed files with 164 additions and 85 deletions
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65
apps/LoopThroughWithOpenGLCompositing/gl/OpenGLVideoIOBridge.cpp
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@@ -9,22 +9,18 @@
OpenGLVideoIOBridge::OpenGLVideoIOBridge(
VideoIODevice& videoIO,
OpenGLRenderer& renderer,
OpenGLRenderPipeline& renderPipeline,
RuntimeHost& runtimeHost,
CRITICAL_SECTION& mutex,
HDC hdc,
HGLRC hglrc,
RenderEffectCallback renderEffect,
OutputReadyCallback outputReady,
PaintCallback paint) :
HGLRC hglrc) :
mVideoIO(videoIO),
mRenderer(renderer),
mRenderPipeline(renderPipeline),
mRuntimeHost(runtimeHost),
mMutex(mutex),
mHdc(hdc),
mHglrc(hglrc),
mRenderEffect(renderEffect),
mOutputReady(outputReady),
mPaint(paint)
mHglrc(hglrc)
{
}
@@ -113,58 +109,7 @@ void OpenGLVideoIOBridge::PlayoutFrameCompleted(const VideoIOCompletion& complet
// make GL context current in this thread
wglMakeCurrent(mHdc, mHglrc);
// Draw the effect output to the off-screen framebuffer.
const auto renderStartTime = std::chrono::steady_clock::now();
glBindFramebuffer(GL_FRAMEBUFFER, mRenderer.CompositeFramebuffer());
mRenderEffect();
glBindFramebuffer(GL_READ_FRAMEBUFFER, mRenderer.CompositeFramebuffer());
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, mRenderer.OutputFramebuffer());
glBlitFramebuffer(0, 0, state.inputFrameSize.width, state.inputFrameSize.height, 0, 0, state.outputFrameSize.width, state.outputFrameSize.height, GL_COLOR_BUFFER_BIT, GL_LINEAR);
glBindFramebuffer(GL_FRAMEBUFFER, mRenderer.OutputFramebuffer());
if (mOutputReady)
mOutputReady();
if (state.outputPixelFormat == VideoIOPixelFormat::V210)
{
glBindFramebuffer(GL_FRAMEBUFFER, mRenderer.OutputPackFramebuffer());
glViewport(0, 0, state.outputPackTextureWidth, state.outputFrameSize.height);
glDisable(GL_SCISSOR_TEST);
glDisable(GL_BLEND);
glDisable(GL_DEPTH_TEST);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, mRenderer.OutputTexture());
glBindVertexArray(mRenderer.FullscreenVertexArray());
glUseProgram(mRenderer.OutputPackProgram());
const GLint outputResolutionLocation = glGetUniformLocation(mRenderer.OutputPackProgram(), "uOutputVideoResolution");
const GLint activeWordsLocation = glGetUniformLocation(mRenderer.OutputPackProgram(), "uActiveV210Words");
if (outputResolutionLocation >= 0)
glUniform2f(outputResolutionLocation, static_cast<float>(state.outputFrameSize.width), static_cast<float>(state.outputFrameSize.height));
if (activeWordsLocation >= 0)
glUniform1f(activeWordsLocation, static_cast<float>(ActiveV210WordsForWidth(state.outputFrameSize.width)));
glDrawArrays(GL_TRIANGLES, 0, 3);
glUseProgram(0);
glBindVertexArray(0);
glBindTexture(GL_TEXTURE_2D, 0);
}
glFlush();
const auto renderEndTime = std::chrono::steady_clock::now();
const double frameBudgetMilliseconds = state.frameBudgetMilliseconds;
const double renderMilliseconds = std::chrono::duration_cast<std::chrono::duration<double, std::milli>>(renderEndTime - renderStartTime).count();
mRuntimeHost.TrySetPerformanceStats(frameBudgetMilliseconds, renderMilliseconds);
mRuntimeHost.TryAdvanceFrame();
glPixelStorei(GL_PACK_ALIGNMENT, 4);
glPixelStorei(GL_PACK_ROW_LENGTH, 0);
if (state.outputPixelFormat == VideoIOPixelFormat::V210)
{
glBindFramebuffer(GL_READ_FRAMEBUFFER, mRenderer.OutputPackFramebuffer());
glReadPixels(0, 0, state.outputPackTextureWidth, state.outputFrameSize.height, GL_RGBA, GL_UNSIGNED_BYTE, outputFrame.bytes);
}
else
{
glBindFramebuffer(GL_READ_FRAMEBUFFER, mRenderer.OutputFramebuffer());
glReadPixels(0, 0, state.outputFrameSize.width, state.outputFrameSize.height, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, outputFrame.bytes);
}
mPaint();
mRenderPipeline.RenderFrame(frameContext, outputFrame);
mVideoIO.EndOutputFrame(outputFrame);