From f149fcec944195efe3d1dd568271c16248cfc50e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Branimir=20Karad=C5=BEi=C4=87?= <branimirkaradzic@gmail.com>
Date: Fri, 21 Aug 2015 21:06:46 -0700
Subject: [PATCH] Fixed 09-hdr for Emscripten.

---
 examples/09-hdr/hdr.cpp               | 672 ++++++++++++++------------
 examples/17-drawstress/drawstress.cpp |  17 +-
 2 files changed, 370 insertions(+), 319 deletions(-)

diff --git a/examples/09-hdr/hdr.cpp b/examples/09-hdr/hdr.cpp
index e9f07b2b..c009da80 100644
--- a/examples/09-hdr/hdr.cpp
+++ b/examples/09-hdr/hdr.cpp
@@ -139,341 +139,393 @@ inline float square(float _x)
 	return _x*_x;
 }
 
-int _main_(int /*_argc*/, char** /*_argv*/)
+class HDR : public entry::AppI
 {
-	PosColorTexCoord0Vertex::init();
-
-	uint32_t width = 1280;
-	uint32_t height = 720;
-	uint32_t debug = BGFX_DEBUG_TEXT;
-	uint32_t reset = BGFX_RESET_VSYNC;
-
-	bgfx::init();
-	bgfx::reset(width, height, reset);
-
-	// Enable debug text.
-	bgfx::setDebug(debug);
-
-	// Set view 0 clear state.
-	bgfx::setViewClear(0
-		, BGFX_CLEAR_COLOR|BGFX_CLEAR_DEPTH
-		, 0x303030ff
-		, 1.0f
-		, 0
-		);
-
-	// Set view debug names.
-	bgfx::setViewName(0, "Skybox");
-	bgfx::setViewName(1, "Mesh");
-	bgfx::setViewName(2, "Luminance");
-	bgfx::setViewName(3, "Downscale luminance 0");
-	bgfx::setViewName(4, "Downscale luminance 1");
-	bgfx::setViewName(5, "Downscale luminance 2");
-	bgfx::setViewName(6, "Downscale luminance 3");
-	bgfx::setViewName(7, "Brightness");
-	bgfx::setViewName(8, "Blur vertical");
-	bgfx::setViewName(9, "Blur horizontal + tonemap");
-
-	bgfx::TextureHandle uffizi = loadTexture("uffizi.dds"
-			, 0
-			| BGFX_TEXTURE_U_CLAMP
-			| BGFX_TEXTURE_V_CLAMP
-			| BGFX_TEXTURE_W_CLAMP
-			);
-
-	bgfx::ProgramHandle skyProgram     = loadProgram("vs_hdr_skybox",  "fs_hdr_skybox");
-	bgfx::ProgramHandle lumProgram     = loadProgram("vs_hdr_lum",     "fs_hdr_lum");
-	bgfx::ProgramHandle lumAvgProgram  = loadProgram("vs_hdr_lumavg",  "fs_hdr_lumavg");
-	bgfx::ProgramHandle blurProgram    = loadProgram("vs_hdr_blur",    "fs_hdr_blur");
-	bgfx::ProgramHandle brightProgram  = loadProgram("vs_hdr_bright",  "fs_hdr_bright");
-	bgfx::ProgramHandle meshProgram    = loadProgram("vs_hdr_mesh",    "fs_hdr_mesh");
-	bgfx::ProgramHandle tonemapProgram = loadProgram("vs_hdr_tonemap", "fs_hdr_tonemap");
-
-	bgfx::UniformHandle s_texCube   = bgfx::createUniform("s_texCube",  bgfx::UniformType::Int1);
-	bgfx::UniformHandle s_texColor  = bgfx::createUniform("s_texColor", bgfx::UniformType::Int1);
-	bgfx::UniformHandle s_texLum    = bgfx::createUniform("s_texLum",   bgfx::UniformType::Int1);
-	bgfx::UniformHandle s_texBlur   = bgfx::createUniform("s_texBlur",  bgfx::UniformType::Int1);
-	bgfx::UniformHandle u_mtx       = bgfx::createUniform("u_mtx",      bgfx::UniformType::Mat4);
-	bgfx::UniformHandle u_tonemap   = bgfx::createUniform("u_tonemap",  bgfx::UniformType::Vec4);
-	bgfx::UniformHandle u_offset    = bgfx::createUniform("u_offset",   bgfx::UniformType::Vec4, 16);
-
-	Mesh* mesh = meshLoad("meshes/bunny.bin");
-
-	bgfx::FrameBufferHandle fbh;
-	bgfx::TextureHandle fbtextures[] =
+	void init(int /*_argc*/, char** /*_argv*/) BX_OVERRIDE
 	{
-		bgfx::createTexture2D(width, height, 1, bgfx::TextureFormat::BGRA8, BGFX_TEXTURE_RT|BGFX_TEXTURE_U_CLAMP|BGFX_TEXTURE_V_CLAMP),
-		bgfx::createTexture2D(width, height, 1, bgfx::TextureFormat::D16, BGFX_TEXTURE_RT_BUFFER_ONLY),
-	};
-	fbh = bgfx::createFrameBuffer(BX_COUNTOF(fbtextures), fbtextures, true);
+		m_width = 1280;
+		m_height = 720;
+		m_debug = BGFX_DEBUG_TEXT;
+		m_reset = BGFX_RESET_VSYNC;
 
-	bgfx::FrameBufferHandle lum[5];
-	lum[0] = bgfx::createFrameBuffer(128, 128, bgfx::TextureFormat::BGRA8);
-	lum[1] = bgfx::createFrameBuffer( 64,  64, bgfx::TextureFormat::BGRA8);
-	lum[2] = bgfx::createFrameBuffer( 16,  16, bgfx::TextureFormat::BGRA8);
-	lum[3] = bgfx::createFrameBuffer(  4,   4, bgfx::TextureFormat::BGRA8);
-	lum[4] = bgfx::createFrameBuffer(  1,   1, bgfx::TextureFormat::BGRA8);
+		bgfx::init();
+		bgfx::reset(m_width, m_height, m_reset);
 
-	bgfx::FrameBufferHandle bright;
-	bright = bgfx::createFrameBuffer(bgfx::BackbufferRatio::Half, bgfx::TextureFormat::BGRA8);
+		// Enable m_debug text.
+		bgfx::setDebug(m_debug);
 
-	bgfx::FrameBufferHandle blur;
-	blur = bgfx::createFrameBuffer(bgfx::BackbufferRatio::Eighth, bgfx::TextureFormat::BGRA8);
+		// Set view 0 clear state.
+		bgfx::setViewClear(0
+				, BGFX_CLEAR_COLOR|BGFX_CLEAR_DEPTH
+				, 0x303030ff
+				, 1.0f
+				, 0
+				);
 
-	// Imgui.
-	imguiCreate();
+		// Create vertex stream declaration.
+		PosColorTexCoord0Vertex::init();
 
-	const bgfx::RendererType::Enum renderer = bgfx::getRendererType();
-	s_texelHalf = bgfx::RendererType::Direct3D9 == renderer ? 0.5f : 0.0f;
-	s_originBottomLeft = bgfx::RendererType::OpenGL == renderer || bgfx::RendererType::OpenGLES == renderer;
+		// Set view m_debug names.
+		bgfx::setViewName(0, "Skybox");
+		bgfx::setViewName(1, "Mesh");
+		bgfx::setViewName(2, "Luminance");
+		bgfx::setViewName(3, "Downscale luminance 0");
+		bgfx::setViewName(4, "Downscale luminance 1");
+		bgfx::setViewName(5, "Downscale luminance 2");
+		bgfx::setViewName(6, "Downscale luminance 3");
+		bgfx::setViewName(7, "Brightness");
+		bgfx::setViewName(8, "Blur vertical");
+		bgfx::setViewName(9, "Blur horizontal + tonemap");
 
-	uint32_t oldWidth  = 0;
-	uint32_t oldHeight = 0;
-	uint32_t oldReset  = reset;
+		m_uffizi = loadTexture("uffizi.dds"
+				, 0
+				| BGFX_TEXTURE_U_CLAMP
+				| BGFX_TEXTURE_V_CLAMP
+				| BGFX_TEXTURE_W_CLAMP
+				);
 
-	float speed      = 0.37f;
-	float middleGray = 0.18f;
-	float white      = 1.1f;
-	float threshold  = 1.5f;
+		m_skyProgram     = loadProgram("vs_hdr_skybox",  "fs_hdr_skybox");
+		m_lumProgram     = loadProgram("vs_hdr_lum",     "fs_hdr_lum");
+		m_lumAvgProgram  = loadProgram("vs_hdr_lumavg",  "fs_hdr_lumavg");
+		m_blurProgram    = loadProgram("vs_hdr_blur",    "fs_hdr_blur");
+		m_brightProgram  = loadProgram("vs_hdr_bright",  "fs_hdr_bright");
+		m_meshProgram    = loadProgram("vs_hdr_mesh",    "fs_hdr_mesh");
+		m_tonemapProgram = loadProgram("vs_hdr_tonemap", "fs_hdr_tonemap");
 
-	int32_t scrollArea = 0;
+		s_texCube   = bgfx::createUniform("s_texCube",  bgfx::UniformType::Int1);
+		s_texColor  = bgfx::createUniform("s_texColor", bgfx::UniformType::Int1);
+		s_texLum    = bgfx::createUniform("s_texLum",   bgfx::UniformType::Int1);
+		s_texBlur   = bgfx::createUniform("s_texBlur",  bgfx::UniformType::Int1);
+		u_mtx       = bgfx::createUniform("u_mtx",      bgfx::UniformType::Mat4);
+		u_tonemap   = bgfx::createUniform("u_tonemap",  bgfx::UniformType::Vec4);
+		u_offset    = bgfx::createUniform("u_offset",   bgfx::UniformType::Vec4, 16);
 
-	float time = 0.0f;
+		m_mesh = meshLoad("meshes/bunny.bin");
 
-	entry::MouseState mouseState;
-	while (!entry::processEvents(width, height, debug, reset, &mouseState) )
-	{
-		if (oldWidth  != width
-		||  oldHeight != height
-		||  oldReset  != reset)
-		{
-			// Recreate variable size render targets when resolution changes.
-			oldWidth  = width;
-			oldHeight = height;
-			oldReset  = reset;
+		m_fbtextures[0] = bgfx::createTexture2D(m_width, m_height, 1, bgfx::TextureFormat::BGRA8, BGFX_TEXTURE_RT|BGFX_TEXTURE_U_CLAMP|BGFX_TEXTURE_V_CLAMP);
+		m_fbtextures[1] = bgfx::createTexture2D(m_width, m_height, 1, bgfx::TextureFormat::D16, BGFX_TEXTURE_RT_BUFFER_ONLY);
+		m_fbh = bgfx::createFrameBuffer(BX_COUNTOF(m_fbtextures), m_fbtextures, true);
 
-			uint32_t msaa = (reset&BGFX_RESET_MSAA_MASK)>>BGFX_RESET_MSAA_SHIFT;
+		m_lum[0] = bgfx::createFrameBuffer(128, 128, bgfx::TextureFormat::BGRA8);
+		m_lum[1] = bgfx::createFrameBuffer( 64,  64, bgfx::TextureFormat::BGRA8);
+		m_lum[2] = bgfx::createFrameBuffer( 16,  16, bgfx::TextureFormat::BGRA8);
+		m_lum[3] = bgfx::createFrameBuffer(  4,   4, bgfx::TextureFormat::BGRA8);
+		m_lum[4] = bgfx::createFrameBuffer(  1,   1, bgfx::TextureFormat::BGRA8);
 
-			bgfx::destroyFrameBuffer(fbh);
+		m_bright = bgfx::createFrameBuffer(bgfx::BackbufferRatio::Half,   bgfx::TextureFormat::BGRA8);
+		m_blur   = bgfx::createFrameBuffer(bgfx::BackbufferRatio::Eighth, bgfx::TextureFormat::BGRA8);
 
-			fbtextures[0] = bgfx::createTexture2D(width, height, 1, bgfx::TextureFormat::BGRA8, ( (msaa+1)<<BGFX_TEXTURE_RT_MSAA_SHIFT)|BGFX_TEXTURE_U_CLAMP|BGFX_TEXTURE_V_CLAMP);
-			fbtextures[1] = bgfx::createTexture2D(width, height, 1, bgfx::TextureFormat::D16, BGFX_TEXTURE_RT_BUFFER_ONLY|( (msaa+1)<<BGFX_TEXTURE_RT_MSAA_SHIFT) );
-			fbh = bgfx::createFrameBuffer(BX_COUNTOF(fbtextures), fbtextures, true);
-		}
+		// Imgui.
+		imguiCreate();
 
-		imguiBeginFrame(mouseState.m_mx
-			, mouseState.m_my
-			, (mouseState.m_buttons[entry::MouseButton::Left  ] ? IMGUI_MBUT_LEFT  : 0)
-			| (mouseState.m_buttons[entry::MouseButton::Right ] ? IMGUI_MBUT_RIGHT : 0)
-			, mouseState.m_mz
-			, width
-			, height
-			);
+		const bgfx::RendererType::Enum renderer = bgfx::getRendererType();
+		s_texelHalf = bgfx::RendererType::Direct3D9 == renderer ? 0.5f : 0.0f;
+		s_originBottomLeft = bgfx::RendererType::OpenGL == renderer || bgfx::RendererType::OpenGLES == renderer;
 
-		imguiBeginScrollArea("Settings", width - width / 5 - 10, 10, width / 5, height / 3, &scrollArea);
-		imguiSeparatorLine();
+		m_oldWidth  = 0;
+		m_oldHeight = 0;
+		m_oldReset  = m_reset;
 
-		imguiSlider("Speed", speed, 0.0f, 1.0f, 0.01f);
-		imguiSeparator();
+		m_speed      = 0.37f;
+		m_middleGray = 0.18f;
+		m_white      = 1.1f;
+		m_threshold  = 1.5f;
 
-		imguiSlider("Middle gray", middleGray, 0.1f, 1.0f, 0.01f);
-		imguiSlider("White point", white, 0.1f, 2.0f, 0.01f);
-		imguiSlider("Threshold", threshold, 0.1f, 2.0f, 0.01f);
+		m_scrollArea = 0;
 
-		imguiEndScrollArea();
-		imguiEndFrame();
-
-		// This dummy draw call is here to make sure that view 0 is cleared
-		// if no other draw calls are submitted to view 0.
-		bgfx::touch(0);
-
-		int64_t now = bx::getHPCounter();
-		static int64_t last = now;
-		const int64_t frameTime = now - last;
-		last = now;
-		const double freq = double(bx::getHPFrequency() );
-		const double toMs = 1000.0/freq;
-
-		time += (float)(frameTime*speed/freq);
-
-		// Use debug font to print information about this example.
-		bgfx::dbgTextClear();
-		bgfx::dbgTextPrintf(0, 1, 0x4f, "bgfx/examples/09-hdr");
-		bgfx::dbgTextPrintf(0, 2, 0x6f, "Description: Using multiple views and frame buffers.");
-		bgfx::dbgTextPrintf(0, 3, 0x0f, "Frame: % 7.3f[ms]", double(frameTime)*toMs);
-
-		// Set views.
-		for (uint32_t ii = 0; ii < 6; ++ii)
-		{
-			bgfx::setViewRect(ii, 0, 0, width, height);
-		}
-		bgfx::setViewFrameBuffer(0, fbh);
-		bgfx::setViewFrameBuffer(1, fbh);
-		bgfx::setViewClear(1, BGFX_CLEAR_DISCARD_DEPTH|BGFX_CLEAR_DISCARD_STENCIL);
-
-		bgfx::setViewRect(2, 0, 0, 128, 128);
-		bgfx::setViewFrameBuffer(2, lum[0]);
-
-		bgfx::setViewRect(3, 0, 0, 64, 64);
-		bgfx::setViewFrameBuffer(3, lum[1]);
-
-		bgfx::setViewRect(4, 0, 0, 16, 16);
-		bgfx::setViewFrameBuffer(4, lum[2]);
-
-		bgfx::setViewRect(5, 0, 0, 4, 4);
-		bgfx::setViewFrameBuffer(5, lum[3]);
-
-		bgfx::setViewRect(6, 0, 0, 1, 1);
-		bgfx::setViewFrameBuffer(6, lum[4]);
-
-		bgfx::setViewRect(7, 0, 0, width/2, height/2);
-		bgfx::setViewFrameBuffer(7, bright);
-
-		bgfx::setViewRect(8, 0, 0, width/8, height/8);
-		bgfx::setViewFrameBuffer(8, blur);
-
-		bgfx::setViewRect(9, 0, 0, width, height);
-
-		float view[16];
-		float proj[16];
-
-		bx::mtxIdentity(view);
-		bx::mtxOrtho(proj, 0.0f, 1.0f, 1.0f, 0.0f, 0.0f, 100.0f);
-
-		// Set view and projection matrix for view 0.
-		for (uint32_t ii = 0; ii < 10; ++ii)
-		{
-			bgfx::setViewTransform(ii, view, proj);
-		}
-
-		float at[3] = { 0.0f, 1.0f, 0.0f };
-		float eye[3] = { 0.0f, 1.0f, -2.5f };
-
-		float mtx[16];
-		bx::mtxRotateXY(mtx
-			, 0.0f
-			, time
-			);
-
-		float temp[4];
-		bx::vec3MulMtx(temp, eye, mtx);
-
-		bx::mtxLookAt(view, temp, at);
-		bx::mtxProj(proj, 60.0f, float(width)/float(height), 0.1f, 100.0f);
-
-		// Set view and projection matrix for view 1.
-		bgfx::setViewTransform(1, view, proj);
-
-		bgfx::setUniform(u_mtx, mtx);
-
-		// Render skybox into view 0.
-		bgfx::setTexture(0, s_texCube, uffizi);
-
-		bgfx::setState(BGFX_STATE_RGB_WRITE|BGFX_STATE_ALPHA_WRITE);
-		screenSpaceQuad( (float)width, (float)height, true);
-		bgfx::submit(0, skyProgram);
-
-		// Render mesh into view 1
-		bgfx::setTexture(0, s_texCube, uffizi);
-		meshSubmit(mesh, 1, meshProgram, NULL);
-
-		// Calculate luminance.
-		setOffsets2x2Lum(u_offset, 128, 128);
-		bgfx::setTexture(0, s_texColor, fbtextures[0]);
-		bgfx::setState(BGFX_STATE_RGB_WRITE|BGFX_STATE_ALPHA_WRITE);
-		screenSpaceQuad(128.0f, 128.0f, s_originBottomLeft);
-		bgfx::submit(2, lumProgram);
-
-		// Downscale luminance 0.
-		setOffsets4x4Lum(u_offset, 128, 128);
-		bgfx::setTexture(0, s_texColor, lum[0]);
-		bgfx::setState(BGFX_STATE_RGB_WRITE|BGFX_STATE_ALPHA_WRITE);
-		screenSpaceQuad(64.0f, 64.0f, s_originBottomLeft);
-		bgfx::submit(3, lumAvgProgram);
-
-		// Downscale luminance 1.
-		setOffsets4x4Lum(u_offset, 64, 64);
-		bgfx::setTexture(0, s_texColor, lum[1]);
-		bgfx::setState(BGFX_STATE_RGB_WRITE|BGFX_STATE_ALPHA_WRITE);
-		screenSpaceQuad(16.0f, 16.0f, s_originBottomLeft);
-		bgfx::submit(4, lumAvgProgram);
-
-		// Downscale luminance 2.
-		setOffsets4x4Lum(u_offset, 16, 16);
-		bgfx::setTexture(0, s_texColor, lum[2]);
-		bgfx::setState(BGFX_STATE_RGB_WRITE|BGFX_STATE_ALPHA_WRITE);
-		screenSpaceQuad(4.0f, 4.0f, s_originBottomLeft);
-		bgfx::submit(5, lumAvgProgram);
-
-		// Downscale luminance 3.
-		setOffsets4x4Lum(u_offset, 4, 4);
-		bgfx::setTexture(0, s_texColor, lum[3]);
-		bgfx::setState(BGFX_STATE_RGB_WRITE|BGFX_STATE_ALPHA_WRITE);
-		screenSpaceQuad(1.0f, 1.0f, s_originBottomLeft);
-		bgfx::submit(6, lumAvgProgram);
-
-		float tonemap[4] = { middleGray, square(white), threshold, time };
-		bgfx::setUniform(u_tonemap, tonemap);
-
-		// Bright pass threshold is tonemap[3].
-		setOffsets4x4Lum(u_offset, width/2, height/2);
-		bgfx::setTexture(0, s_texColor, fbtextures[0]);
-		bgfx::setTexture(1, s_texLum, lum[4]);
-		bgfx::setState(BGFX_STATE_RGB_WRITE|BGFX_STATE_ALPHA_WRITE);
-		screenSpaceQuad( (float)width/2.0f, (float)height/2.0f, s_originBottomLeft);
-		bgfx::submit(7, brightProgram);
-
-		// Blur bright pass vertically.
-		bgfx::setTexture(0, s_texColor, bright);
-		bgfx::setState(BGFX_STATE_RGB_WRITE|BGFX_STATE_ALPHA_WRITE);
-		screenSpaceQuad( (float)width/8.0f, (float)height/8.0f, s_originBottomLeft);
-		bgfx::submit(8, blurProgram);
-
-		// Blur bright pass horizontally, do tonemaping and combine.
-		bgfx::setTexture(0, s_texColor, fbtextures[0]);
-		bgfx::setTexture(1, s_texLum, lum[4]);
-		bgfx::setTexture(2, s_texBlur, blur);
-		bgfx::setState(BGFX_STATE_RGB_WRITE|BGFX_STATE_ALPHA_WRITE);
-		screenSpaceQuad( (float)width, (float)height, s_originBottomLeft);
-		bgfx::submit(9, tonemapProgram);
-
-		// Advance to next frame. Rendering thread will be kicked to
-		// process submitted rendering primitives.
-		bgfx::frame();
+		m_time = 0.0f;
 	}
 
-	// Cleanup.
-	imguiDestroy();
-
-	meshUnload(mesh);
-
-	for (uint32_t ii = 0; ii < BX_COUNTOF(lum); ++ii)
+	virtual int shutdown() BX_OVERRIDE
 	{
-		bgfx::destroyFrameBuffer(lum[ii]);
+		// Cleanup.
+		imguiDestroy();
+
+		meshUnload(m_mesh);
+
+		for (uint32_t ii = 0; ii < BX_COUNTOF(m_lum); ++ii)
+		{
+			bgfx::destroyFrameBuffer(m_lum[ii]);
+		}
+		bgfx::destroyFrameBuffer(m_bright);
+		bgfx::destroyFrameBuffer(m_blur);
+		bgfx::destroyFrameBuffer(m_fbh);
+
+		bgfx::destroyProgram(m_meshProgram);
+		bgfx::destroyProgram(m_skyProgram);
+		bgfx::destroyProgram(m_tonemapProgram);
+		bgfx::destroyProgram(m_lumProgram);
+		bgfx::destroyProgram(m_lumAvgProgram);
+		bgfx::destroyProgram(m_blurProgram);
+		bgfx::destroyProgram(m_brightProgram);
+		bgfx::destroyTexture(m_uffizi);
+
+		bgfx::destroyUniform(s_texCube);
+		bgfx::destroyUniform(s_texColor);
+		bgfx::destroyUniform(s_texLum);
+		bgfx::destroyUniform(s_texBlur);
+		bgfx::destroyUniform(u_mtx);
+		bgfx::destroyUniform(u_tonemap);
+		bgfx::destroyUniform(u_offset);
+
+		// Shutdown bgfx.
+		bgfx::shutdown();
+
+		return 0;
 	}
-	bgfx::destroyFrameBuffer(bright);
-	bgfx::destroyFrameBuffer(blur);
-	bgfx::destroyFrameBuffer(fbh);
 
-	bgfx::destroyProgram(meshProgram);
-	bgfx::destroyProgram(skyProgram);
-	bgfx::destroyProgram(tonemapProgram);
-	bgfx::destroyProgram(lumProgram);
-	bgfx::destroyProgram(lumAvgProgram);
-	bgfx::destroyProgram(blurProgram);
-	bgfx::destroyProgram(brightProgram);
-	bgfx::destroyTexture(uffizi);
+	bool update() BX_OVERRIDE
+	{
+		if (!entry::processEvents(m_width, m_height, m_debug, m_reset, &m_mouseState) )
+		{
+			if (m_oldWidth  != m_width
+			||  m_oldHeight != m_height
+			||  m_oldReset  != m_reset)
+			{
+				// Recreate variable size render targets when resolution changes.
+				m_oldWidth  = m_width;
+				m_oldHeight = m_height;
+				m_oldReset  = m_reset;
 
-	bgfx::destroyUniform(s_texCube);
-	bgfx::destroyUniform(s_texColor);
-	bgfx::destroyUniform(s_texLum);
-	bgfx::destroyUniform(s_texBlur);
-	bgfx::destroyUniform(u_mtx);
-	bgfx::destroyUniform(u_tonemap);
-	bgfx::destroyUniform(u_offset);
+				uint32_t msaa = (m_reset&BGFX_RESET_MSAA_MASK)>>BGFX_RESET_MSAA_SHIFT;
 
-	// Shutdown bgfx.
-	bgfx::shutdown();
+				bgfx::destroyFrameBuffer(m_fbh);
 
-	return 0;
-}
+				m_fbtextures[0] = bgfx::createTexture2D(m_width, m_height, 1, bgfx::TextureFormat::BGRA8, ( (msaa+1)<<BGFX_TEXTURE_RT_MSAA_SHIFT)|BGFX_TEXTURE_U_CLAMP|BGFX_TEXTURE_V_CLAMP);
+				m_fbtextures[1] = bgfx::createTexture2D(m_width, m_height, 1, bgfx::TextureFormat::D16, BGFX_TEXTURE_RT_BUFFER_ONLY|( (msaa+1)<<BGFX_TEXTURE_RT_MSAA_SHIFT) );
+				m_fbh = bgfx::createFrameBuffer(BX_COUNTOF(m_fbtextures), m_fbtextures, true);
+			}
+
+			imguiBeginFrame(m_mouseState.m_mx
+					,  m_mouseState.m_my
+					, (m_mouseState.m_buttons[entry::MouseButton::Left  ] ? IMGUI_MBUT_LEFT  : 0)
+					| (m_mouseState.m_buttons[entry::MouseButton::Right ] ? IMGUI_MBUT_RIGHT : 0)
+					,  m_mouseState.m_mz
+					, m_width
+					, m_height
+					);
+
+			imguiBeginScrollArea("Settings", m_width - m_width / 5 - 10, 10, m_width / 5, m_height / 3, &m_scrollArea);
+			imguiSeparatorLine();
+
+			imguiSlider("m_speed", m_speed, 0.0f, 1.0f, 0.01f);
+			imguiSeparator();
+
+			imguiSlider("Middle gray",   m_middleGray, 0.1f, 1.0f, 0.01f);
+			imguiSlider("m_white point", m_white,      0.1f, 2.0f, 0.01f);
+			imguiSlider("m_threshold",   m_threshold,  0.1f, 2.0f, 0.01f);
+
+			imguiEndScrollArea();
+			imguiEndFrame();
+
+			// This dummy draw call is here to make sure that view 0 is cleared
+			// if no other draw calls are submitted to view 0.
+			bgfx::touch(0);
+
+			int64_t now = bx::getHPCounter();
+			static int64_t last = now;
+			const int64_t frameTime = now - last;
+			last = now;
+			const double freq = double(bx::getHPFrequency() );
+			const double toMs = 1000.0/freq;
+
+			m_time += (float)(frameTime*m_speed/freq);
+
+			// Use m_debug font to print information about this example.
+			bgfx::dbgTextClear();
+			bgfx::dbgTextPrintf(0, 1, 0x4f, "bgfx/examples/09-hdr");
+			bgfx::dbgTextPrintf(0, 2, 0x6f, "Description: Using multiple views and frame buffers.");
+			bgfx::dbgTextPrintf(0, 3, 0x0f, "Frame: % 7.3f[ms]", double(frameTime)*toMs);
+
+			// Set views.
+			for (uint32_t ii = 0; ii < 6; ++ii)
+			{
+				bgfx::setViewRect(ii, 0, 0, m_width, m_height);
+			}
+			bgfx::setViewFrameBuffer(0, m_fbh);
+			bgfx::setViewFrameBuffer(1, m_fbh);
+			bgfx::setViewClear(1, BGFX_CLEAR_DISCARD_DEPTH|BGFX_CLEAR_DISCARD_STENCIL);
+
+			bgfx::setViewRect(2, 0, 0, 128, 128);
+			bgfx::setViewFrameBuffer(2, m_lum[0]);
+
+			bgfx::setViewRect(3, 0, 0, 64, 64);
+			bgfx::setViewFrameBuffer(3, m_lum[1]);
+
+			bgfx::setViewRect(4, 0, 0, 16, 16);
+			bgfx::setViewFrameBuffer(4, m_lum[2]);
+
+			bgfx::setViewRect(5, 0, 0, 4, 4);
+			bgfx::setViewFrameBuffer(5, m_lum[3]);
+
+			bgfx::setViewRect(6, 0, 0, 1, 1);
+			bgfx::setViewFrameBuffer(6, m_lum[4]);
+
+			bgfx::setViewRect(7, 0, 0, m_width/2, m_height/2);
+			bgfx::setViewFrameBuffer(7, m_bright);
+
+			bgfx::setViewRect(8, 0, 0, m_width/8, m_height/8);
+			bgfx::setViewFrameBuffer(8, m_blur);
+
+			bgfx::setViewRect(9, 0, 0, m_width, m_height);
+
+			float view[16];
+			float proj[16];
+
+			bx::mtxIdentity(view);
+			bx::mtxOrtho(proj, 0.0f, 1.0f, 1.0f, 0.0f, 0.0f, 100.0f);
+
+			// Set view and projection matrix for view 0.
+			for (uint32_t ii = 0; ii < 10; ++ii)
+			{
+				bgfx::setViewTransform(ii, view, proj);
+			}
+
+			float at[3] = { 0.0f, 1.0f, 0.0f };
+			float eye[3] = { 0.0f, 1.0f, -2.5f };
+
+			float mtx[16];
+			bx::mtxRotateXY(mtx
+					, 0.0f
+					, m_time
+					);
+
+			float temp[4];
+			bx::vec3MulMtx(temp, eye, mtx);
+
+			bx::mtxLookAt(view, temp, at);
+			bx::mtxProj(proj, 60.0f, float(m_width)/float(m_height), 0.1f, 100.0f);
+
+			// Set view and projection matrix for view 1.
+			bgfx::setViewTransform(1, view, proj);
+
+			bgfx::setUniform(u_mtx, mtx);
+
+			// Render skybox into view 0.
+			bgfx::setTexture(0, s_texCube, m_uffizi);
+
+			bgfx::setState(BGFX_STATE_RGB_WRITE|BGFX_STATE_ALPHA_WRITE);
+			screenSpaceQuad( (float)m_width, (float)m_height, true);
+			bgfx::submit(0, m_skyProgram);
+
+			// Render m_mesh into view 1
+			bgfx::setTexture(0, s_texCube, m_uffizi);
+			meshSubmit(m_mesh, 1, m_meshProgram, NULL);
+
+			// Calculate luminance.
+			setOffsets2x2Lum(u_offset, 128, 128);
+			bgfx::setTexture(0, s_texColor, m_fbtextures[0]);
+			bgfx::setState(BGFX_STATE_RGB_WRITE|BGFX_STATE_ALPHA_WRITE);
+			screenSpaceQuad(128.0f, 128.0f, s_originBottomLeft);
+			bgfx::submit(2, m_lumProgram);
+
+			// Downscale luminance 0.
+			setOffsets4x4Lum(u_offset, 128, 128);
+			bgfx::setTexture(0, s_texColor, m_lum[0]);
+			bgfx::setState(BGFX_STATE_RGB_WRITE|BGFX_STATE_ALPHA_WRITE);
+			screenSpaceQuad(64.0f, 64.0f, s_originBottomLeft);
+			bgfx::submit(3, m_lumAvgProgram);
+
+			// Downscale luminance 1.
+			setOffsets4x4Lum(u_offset, 64, 64);
+			bgfx::setTexture(0, s_texColor, m_lum[1]);
+			bgfx::setState(BGFX_STATE_RGB_WRITE|BGFX_STATE_ALPHA_WRITE);
+			screenSpaceQuad(16.0f, 16.0f, s_originBottomLeft);
+			bgfx::submit(4, m_lumAvgProgram);
+
+			// Downscale luminance 2.
+			setOffsets4x4Lum(u_offset, 16, 16);
+			bgfx::setTexture(0, s_texColor, m_lum[2]);
+			bgfx::setState(BGFX_STATE_RGB_WRITE|BGFX_STATE_ALPHA_WRITE);
+			screenSpaceQuad(4.0f, 4.0f, s_originBottomLeft);
+			bgfx::submit(5, m_lumAvgProgram);
+
+			// Downscale luminance 3.
+			setOffsets4x4Lum(u_offset, 4, 4);
+			bgfx::setTexture(0, s_texColor, m_lum[3]);
+			bgfx::setState(BGFX_STATE_RGB_WRITE|BGFX_STATE_ALPHA_WRITE);
+			screenSpaceQuad(1.0f, 1.0f, s_originBottomLeft);
+			bgfx::submit(6, m_lumAvgProgram);
+
+			float tonemap[4] = { m_middleGray, square(m_white), m_threshold, m_time };
+			bgfx::setUniform(u_tonemap, tonemap);
+
+			// m_bright pass m_threshold is tonemap[3].
+			setOffsets4x4Lum(u_offset, m_width/2, m_height/2);
+			bgfx::setTexture(0, s_texColor, m_fbtextures[0]);
+			bgfx::setTexture(1, s_texLum, m_lum[4]);
+			bgfx::setState(BGFX_STATE_RGB_WRITE|BGFX_STATE_ALPHA_WRITE);
+			screenSpaceQuad( (float)m_width/2.0f, (float)m_height/2.0f, s_originBottomLeft);
+			bgfx::submit(7, m_brightProgram);
+
+			// m_blur m_bright pass vertically.
+			bgfx::setTexture(0, s_texColor, m_bright);
+			bgfx::setState(BGFX_STATE_RGB_WRITE|BGFX_STATE_ALPHA_WRITE);
+			screenSpaceQuad( (float)m_width/8.0f, (float)m_height/8.0f, s_originBottomLeft);
+			bgfx::submit(8, m_blurProgram);
+
+			// m_blur m_bright pass horizontally, do tonemaping and combine.
+			bgfx::setTexture(0, s_texColor, m_fbtextures[0]);
+			bgfx::setTexture(1, s_texLum, m_lum[4]);
+			bgfx::setTexture(2, s_texBlur, m_blur);
+			bgfx::setState(BGFX_STATE_RGB_WRITE|BGFX_STATE_ALPHA_WRITE);
+			screenSpaceQuad( (float)m_width, (float)m_height, s_originBottomLeft);
+			bgfx::submit(9, m_tonemapProgram);
+
+			// Advance to next frame. Rendering thread will be kicked to
+			// process submitted rendering primitives.
+			bgfx::frame();
+
+			return true;
+		}
+
+		return false;
+	}
+
+	entry::MouseState m_mouseState;
+
+	bgfx::ProgramHandle m_skyProgram;
+	bgfx::ProgramHandle m_lumProgram;
+	bgfx::ProgramHandle m_lumAvgProgram;
+	bgfx::ProgramHandle m_blurProgram;
+	bgfx::ProgramHandle m_brightProgram;
+	bgfx::ProgramHandle m_meshProgram;
+	bgfx::ProgramHandle m_tonemapProgram;
+
+	bgfx::TextureHandle m_uffizi;
+	bgfx::UniformHandle s_texCube;
+	bgfx::UniformHandle s_texColor;
+	bgfx::UniformHandle s_texLum;
+	bgfx::UniformHandle s_texBlur;
+	bgfx::UniformHandle u_mtx;
+	bgfx::UniformHandle u_tonemap;
+	bgfx::UniformHandle u_offset;
+
+	Mesh* m_mesh;
+
+	bgfx::TextureHandle m_fbtextures[2];
+	bgfx::FrameBufferHandle m_fbh;
+	bgfx::FrameBufferHandle m_lum[5];
+	bgfx::FrameBufferHandle m_bright;
+	bgfx::FrameBufferHandle m_blur;
+
+	uint32_t m_width;
+	uint32_t m_height;
+	uint32_t m_debug;
+	uint32_t m_reset;
+
+	uint32_t m_oldWidth;
+	uint32_t m_oldHeight;
+	uint32_t m_oldReset;
+
+	float m_speed;
+	float m_middleGray;
+	float m_white;
+	float m_threshold;
+
+	int32_t m_scrollArea;
+
+	float m_time;
+};
+
+ENTRY_IMPLEMENT_MAIN(HDR);
diff --git a/examples/17-drawstress/drawstress.cpp b/examples/17-drawstress/drawstress.cpp
index a442e885..500337df 100644
--- a/examples/17-drawstress/drawstress.cpp
+++ b/examples/17-drawstress/drawstress.cpp
@@ -74,8 +74,6 @@ class DrawStress : public entry::AppI
 {
 	void init(int /*_argc*/, char** /*_argv*/) BX_OVERRIDE
 	{
-		BX_UNUSED(_argc, _argv);
-
 		m_width  = 1280;
 		m_height = 720;
 		m_debug  = BGFX_DEBUG_TEXT;
@@ -171,8 +169,7 @@ class DrawStress : public entry::AppI
 
 	bool update() BX_OVERRIDE
 	{
-		entry::MouseState mouseState;
-		if (!entry::processEvents(m_width, m_height, m_debug, m_reset, &mouseState) )
+		if (!entry::processEvents(m_width, m_height, m_debug, m_reset, &m_mouseState) )
 		{
 			int64_t now = bx::getHPCounter();
 			static int64_t last = now;
@@ -210,11 +207,11 @@ class DrawStress : public entry::AppI
 
 			float time = (float)( (now-m_timeOffset)/freq);
 
-			imguiBeginFrame(mouseState.m_mx
-					, mouseState.m_my
-					, (mouseState.m_buttons[entry::MouseButton::Left  ] ? IMGUI_MBUT_LEFT  : 0)
-					| (mouseState.m_buttons[entry::MouseButton::Right ] ? IMGUI_MBUT_RIGHT : 0)
-					, mouseState.m_mz
+			imguiBeginFrame(m_mouseState.m_mx
+					,  m_mouseState.m_my
+					, (m_mouseState.m_buttons[entry::MouseButton::Left  ] ? IMGUI_MBUT_LEFT  : 0)
+					| (m_mouseState.m_buttons[entry::MouseButton::Right ] ? IMGUI_MBUT_RIGHT : 0)
+					,  m_mouseState.m_mz
 					, m_width
 					, m_height
 					);
@@ -316,6 +313,8 @@ class DrawStress : public entry::AppI
 		return false;
 	}
 
+	entry::MouseState m_mouseState;
+
 	uint32_t m_width;
 	uint32_t m_height;
 	uint32_t m_debug;