OGL: Use PBO for framedump, with async readback.

1 files changed, 54 insertions, 12 deletions

diff --git a/Source/Core/VideoBackends/OGL/Render.cpp b/Source/Core/VideoBackends/OGL/Render.cpp
index e3d3bea2d5..f0ab819815 100644
--- a/Source/Core/VideoBackends/OGL/Render.cpp
+++ b/Source/Core/VideoBackends/OGL/Render.cpp
@@ -767,6 +767,9 @@ Renderer::Renderer()
 
 Renderer::~Renderer()
 {
+  FlushFrameDump();
+  if (m_frame_dumping_pbo[0])
+    glDeleteBuffers(2, m_frame_dumping_pbo.data());
 }
 
 void Renderer::Shutdown()
@@ -1447,19 +1450,9 @@ void Renderer::SwapImpl(u32 xfbAddr, u32 fbWidth, u32 fbStride, u32 fbHeight,
 
   glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
 
-  if (IsFrameDumping())
-  {
-    std::vector<u8> image(flipped_trc.GetWidth() * flipped_trc.GetHeight() * 4);
-
-    glPixelStorei(GL_PACK_ALIGNMENT, 1);
-    glReadPixels(flipped_trc.left, flipped_trc.bottom, flipped_trc.GetWidth(),
-                 flipped_trc.GetHeight(), GL_RGBA, GL_UNSIGNED_BYTE, image.data());
+  FlushFrameDump();
+  DumpFrame(flipped_trc, ticks);
 
-    AVIDump::Frame state = AVIDump::FetchState(ticks);
-    DumpFrameData(image.data(), flipped_trc.GetWidth(), flipped_trc.GetHeight(),
-                  flipped_trc.GetWidth() * 4, state, true);
-    FinishFrameData();
-  }
   // Finish up the current frame, print some stats
 
   SetWindowSize(fbStride, fbHeight);
@@ -1588,6 +1581,55 @@ void Renderer::SwapImpl(u32 xfbAddr, u32 fbWidth, u32 fbStride, u32 fbHeight,
   ClearEFBCache();
 }
 
+void Renderer::FlushFrameDump()
+{
+  if (!m_last_frame_exported)
+    return;
+
+  FinishFrameData();
+  glBindBuffer(GL_PIXEL_PACK_BUFFER, m_frame_dumping_pbo[0]);
+  m_frame_pbo_is_mapped[0] = true;
+  void* data = glMapBufferRange(GL_PIXEL_PACK_BUFFER, 0,
+                                m_last_frame_width * m_last_frame_height * 4, GL_MAP_READ_BIT);
+  DumpFrameData(reinterpret_cast<u8*>(data), m_last_frame_width, m_last_frame_height,
+                m_last_frame_width * 4, m_last_frame_state, true);
+  glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
+  m_last_frame_exported = false;
+}
+
+void Renderer::DumpFrame(const TargetRectangle& flipped_trc, u64 ticks)
+{
+  if (!IsFrameDumping())
+    return;
+
+  if (!m_frame_dumping_pbo[0])
+  {
+    glGenBuffers(2, m_frame_dumping_pbo.data());
+    glBindBuffer(GL_PIXEL_PACK_BUFFER, m_frame_dumping_pbo[0]);
+  }
+  else
+  {
+    std::swap(m_frame_dumping_pbo[0], m_frame_dumping_pbo[1]);
+    std::swap(m_frame_pbo_is_mapped[0], m_frame_pbo_is_mapped[1]);
+    glBindBuffer(GL_PIXEL_PACK_BUFFER, m_frame_dumping_pbo[0]);
+    if (m_frame_pbo_is_mapped[0])
+      glUnmapBuffer(GL_PIXEL_PACK_BUFFER);
+    m_frame_pbo_is_mapped[0] = false;
+  }
+
+  m_last_frame_width = flipped_trc.GetWidth();
+  m_last_frame_height = flipped_trc.GetHeight();
+  m_last_frame_state = AVIDump::FetchState(ticks);
+  m_last_frame_exported = true;
+
+  glBufferData(GL_PIXEL_PACK_BUFFER, m_last_frame_width * m_last_frame_height * 4, nullptr,
+               GL_STREAM_READ);
+  glPixelStorei(GL_PACK_ALIGNMENT, 1);
+  glReadPixels(flipped_trc.left, flipped_trc.bottom, m_last_frame_width, m_last_frame_height,
+               GL_RGBA, GL_UNSIGNED_BYTE, 0);
+  glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
+}
+
 // ALWAYS call RestoreAPIState for each ResetAPIState call you're doing
 void Renderer::ResetAPIState()
 {