Added flip after submit reset flag.

examples/common/entry/entry.cpp

@@ -123,7 +123,9 @@ BX_PRAGMA_DIAGNOSTIC_POP();
 			||  setOrToggle(s_reset, "hmd",         BGFX_RESET_HMD,               1, _argc, _argv)
 			||  setOrToggle(s_reset, "hmddbg",      BGFX_RESET_HMD_DEBUG,         1, _argc, _argv)
 			||  setOrToggle(s_reset, "hmdrecenter", BGFX_RESET_HMD_RECENTER,      1, _argc, _argv)
-			||  setOrToggle(s_reset, "msaa",        BGFX_RESET_MSAA_X16,      1, _argc, _argv) )
+			||  setOrToggle(s_reset, "msaa",        BGFX_RESET_MSAA_X16,          1, _argc, _argv)
+			||  setOrToggle(s_reset, "flip",        BGFX_RESET_FLIP_AFTER_SUBMIT, 1, _argc, _argv)
+			   )
 			{
 				return 0;
 			}
@@ -176,6 +178,7 @@ BX_PRAGMA_DIAGNOSTIC_POP();
 		{ entry::Key::F4,           entry::Modifier::LeftCtrl,  1, cmd, "graphics hmddbg"                   },
 		{ entry::Key::F7,           entry::Modifier::None,      1, cmd, "graphics vsync"                    },
 		{ entry::Key::F8,           entry::Modifier::None,      1, cmd, "graphics msaa"                     },
+		{ entry::Key::F9,           entry::Modifier::None,      1, cmd, "graphics flip"                     },
 		{ entry::Key::Print,        entry::Modifier::None,      1, cmd, "graphics screenshot"               },
 
 		INPUT_BINDING_END

include/bgfx.h

@@ -571,7 +571,12 @@ namespace bgfx
 	///   - `BGFX_RESET_FULLSCREEN` - Not supported yet.
 	///   - `BGFX_RESET_MSAA_X[2/4/8/16]` - Enable 2, 4, 8 or 16 x MSAA.
 	///   - `BGFX_RESET_VSYNC` - Enable V-Sync.
+	///   - `BGFX_RESET_MAXANISOTROPY` - Turn on/off max anisotropy.
 	///   - `BGFX_RESET_CAPTURE` - Begin screen capture.
+	///   - `BGFX_RESET_HMD` - HMD stereo rendering.
+	///   - `BGFX_RESET_HMD_DEBUG` - HMD stereo rendering debug mode.
+	///   - `BGFX_RESET_HMD_RECENTER` - HMD calibration.
+	///   - `BGFX_RESET_FLIP_AFTER_SUBMIT` - Flip back buffer after submit.
 	///
 	/// @attention This call doesn't actually change window size, it just
 	///   resizes back-buffer. Windowing code has to change window size.

include/bgfxdefines.h

@@ -303,6 +303,7 @@
 #define BGFX_RESET_HMD                   UINT32_C(0x00000400)
 #define BGFX_RESET_HMD_DEBUG             UINT32_C(0x00000800)
 #define BGFX_RESET_HMD_RECENTER          UINT32_C(0x00001000)
+#define BGFX_RESET_FLIP_AFTER_SUBMIT     UINT32_C(0x00002000)
 
 ///
 #define BGFX_CAPS_TEXTURE_COMPARE_LEQUAL UINT64_C(0x0000000000000001)

src/bgfx.cpp

@@ -1190,6 +1190,8 @@ namespace bgfx
 		m_render = m_submit;
 		m_submit = temp;
 
+		memcpy(&m_submit->m_hmd, &m_render->m_hmd, sizeof(HMD) );
+
 		m_frames++;
 		m_submit->start();
 
@@ -1205,7 +1207,8 @@ namespace bgfx
 
 	bool Context::renderFrame()
 	{
-		if (m_rendererInitialized)
+		if (m_rendererInitialized
+		&&  !m_flipAfterSubmit)
 		{
 			m_renderCtx->flip();
 		}
@@ -1221,6 +1224,12 @@ namespace bgfx
 
 		renderSemPost();
 
+		if (m_rendererInitialized
+		&&  m_flipAfterSubmit)
+		{
+			m_renderCtx->flip();
+		}
+
 		return m_exit;
 	}
 

src/bgfx_p.h

@@ -1893,6 +1893,7 @@ namespace bgfx
 			, m_renderCtx(NULL)
 			, m_rendererInitialized(false)
 			, m_exit(false)
+			, m_flipAfterSubmit(false)
 		{
 		}
 
@@ -1927,6 +1928,8 @@ namespace bgfx
 			m_resolution.m_height = bx::uint32_max(1, _height);
 			m_resolution.m_flags  = _flags;
 
+			m_flipAfterSubmit = !!(_flags & BGFX_RESET_FLIP_AFTER_SUBMIT);
+
 			memset(m_fb, 0xff, sizeof(m_fb) );
 
 			for (uint16_t ii = 0, num = m_textureHandle.getNumHandles(); ii < num; ++ii)
@@ -3527,6 +3530,7 @@ namespace bgfx
 
 		bool m_rendererInitialized;
 		bool m_exit;
+		bool m_flipAfterSubmit;
 
 		typedef UpdateBatchT<256> TextureUpdateBatch;
 		BX_ALIGN_DECL_CACHE_LINE(TextureUpdateBatch m_textureUpdateBatch);