Added 07-callback example.

examples/07-callback/callback.cpp

@@ -0,0 +1,579 @@
+/*
+ * Copyright 2011-2012 Branimir Karadzic. All rights reserved.
+ * License: http://www.opensource.org/licenses/BSD-2-Clause
+ */
+
+#include <bgfx.h>
+#include <bx/bx.h>
+#include <bx/timer.h>
+#include <bx/readerwriter.h>
+#include <bx/string.h>
+#include "../common/dbg.h"
+#include "../common/math.h"
+
+#include <inttypes.h>
+#include <stdio.h>
+#include <string.h>
+
+struct PosColorVertex
+{
+	float m_x;
+	float m_y;
+	float m_z;
+	uint32_t m_abgr;
+};
+
+static bgfx::VertexDecl s_PosColorDecl;
+
+static PosColorVertex s_cubeVertices[8] =
+{
+	{-1.0f,  1.0f,  1.0f, 0xff000000 },
+	{ 1.0f,  1.0f,  1.0f, 0xff0000ff },
+	{-1.0f, -1.0f,  1.0f, 0xff00ff00 },
+	{ 1.0f, -1.0f,  1.0f, 0xff00ffff },
+	{-1.0f,  1.0f, -1.0f, 0xffff0000 },
+	{ 1.0f,  1.0f, -1.0f, 0xffff00ff },
+	{-1.0f, -1.0f, -1.0f, 0xffffff00 },
+	{ 1.0f, -1.0f, -1.0f, 0xffffffff },
+};
+
+static const uint16_t s_cubeIndices[36] =
+{
+	0, 2, 1, // 0
+	1, 2, 3,
+	4, 5, 6, // 2
+	5, 7, 6,
+	0, 4, 2, // 4
+	4, 6, 2,
+	1, 3, 5, // 6
+	5, 3, 7,
+	0, 1, 4, // 8
+	4, 1, 5,
+	2, 6, 3, // 10
+	6, 7, 3,
+};
+
+static const char* s_shaderPath = NULL;
+
+static void shaderFilePath(char* _out, const char* _name)
+{
+	strcpy(_out, s_shaderPath);
+	strcat(_out, _name);
+	strcat(_out, ".bin");
+}
+
+long int fsize(FILE* _file)
+{
+	long int pos = ftell(_file);
+	fseek(_file, 0L, SEEK_END);
+	long int size = ftell(_file);
+	fseek(_file, pos, SEEK_SET);
+	return size;
+}
+
+static const bgfx::Memory* load(const char* _filePath)
+{
+	FILE* file = fopen(_filePath, "rb");
+	if (NULL != file)
+	{
+		uint32_t size = (uint32_t)fsize(file);
+		const bgfx::Memory* mem = bgfx::alloc(size+1);
+		size_t ignore = fread(mem->data, 1, size, file);
+		BX_UNUSED(ignore);
+		fclose(file);
+		mem->data[mem->size-1] = '\0';
+		return mem;
+	}
+
+	return NULL;
+}
+
+static const bgfx::Memory* loadShader(const char* _name)
+{
+	char filePath[512];
+	shaderFilePath(filePath, _name);
+	return load(filePath);
+}
+
+void saveTga(const char* _filePath, uint32_t _width, uint32_t _height, uint32_t _srcPitch, const void* _src, bool _grayscale, bool _yflip)
+{
+	FILE* file = fopen(_filePath, "wb");
+	if ( NULL != file )
+	{
+		uint8_t type = _grayscale ? 3 : 2;
+		uint8_t bpp = _grayscale ? 8 : 32;
+
+		putc(0, file);
+		putc(0, file);
+		putc(type, file);
+		putc(0, file); 
+		putc(0, file);
+		putc(0, file); 
+		putc(0, file);
+		putc(0, file);
+		putc(0, file); 
+		putc(0, file);
+		putc(0, file); 
+		putc(0, file);
+		putc(_width&0xff, file);
+		putc( (_width>>8)&0xff, file);
+		putc(_height&0xff, file);
+		putc( (_height>>8)&0xff, file);
+		putc(bpp, file);
+		putc(32, file);
+
+		uint32_t dstPitch = _width*bpp/8;
+		if (_yflip)
+		{
+			uint8_t* data = (uint8_t*)_src + _srcPitch*_height - _srcPitch;
+			for (uint32_t yy = 0; yy < _height; ++yy)
+			{
+				fwrite(data, dstPitch, 1, file);
+				data -= _srcPitch;
+			}
+		}
+		else
+		{
+			uint8_t* data = (uint8_t*)_src;
+			for (uint32_t yy = 0; yy < _height; ++yy)
+			{
+				fwrite(data, dstPitch, 1, file);
+				data += _srcPitch;
+			}
+		}
+
+		fclose(file);
+	}
+}
+
+// Simple AVI writer. VideoLAN and VirtualDub can decode it.
+// Needs some bits to get jiggled to work with other players. But it's good
+// enough for an example.
+struct AviWriter
+{
+	AviWriter()
+		: m_frame(NULL)
+		, m_frameSize(0)
+		, m_width(0)
+		, m_height(0)
+		, m_yflip(false)
+	{
+	}
+
+	bool open(const char* _filePath, uint32_t _width, uint32_t _height, uint32_t _fps, bool _yflip)
+	{
+		if (0 != m_writer.open(_filePath) )
+		{
+			return false;
+		}
+
+		m_frameSize = _width * _height * 3;
+		m_frame = new uint8_t[m_frameSize + 8];
+		m_width = _width;
+		m_height = _height;
+		
+		// Bgfx returns _yflip true for OpenGL since bottom left corner is 0, 0. In D3D top left corner
+		// is 0, 0. DIB expect OpenGL style coordinates, so this is inverted logic for AVI writer.
+		m_yflip = !_yflip;
+
+		bx::StaticMemoryBlockWriter mem(m_frame, 8);
+		// Stream Data (LIST 'movi' Chunk) http://msdn.microsoft.com/en-us/library/ms899496.aspx
+		bx::write(&mem, BX_MAKEFOURCC('0', '0', 'd', 'b') );
+		bx::write(&mem, m_frameSize);
+
+		bx::write(&m_writer, BX_MAKEFOURCC('R', 'I', 'F', 'F') );
+		bx::write(&m_writer, UINT32_C(0) );
+
+		bx::write(&m_writer, BX_MAKEFOURCC('A', 'V', 'I', ' ') );
+
+		// AVI RIFF Form http://msdn.microsoft.com/en-us/library/ms899422.aspx
+		bx::write(&m_writer, BX_MAKEFOURCC('L', 'I', 'S', 'T') );
+		bx::write(&m_writer, UINT32_C(196) );
+		bx::write(&m_writer, BX_MAKEFOURCC('h', 'd', 'r', 'l') );
+
+		// AVI Main Header http://msdn.microsoft.com/en-us/library/ms779632.aspx
+		bx::write(&m_writer, BX_MAKEFOURCC('a', 'v', 'i', 'h') );
+		bx::write(&m_writer, UINT32_C(56) );
+		bx::write(&m_writer, UINT32_C(0) );      // dwMicroSecPerFrame
+		bx::write(&m_writer, UINT32_C(0) );      // dwMaxBytesPerSec
+		bx::write(&m_writer, UINT32_C(0) );      // dwPaddingGranularity
+		bx::write(&m_writer, UINT32_C(0) );      // dwFlags
+		bx::write(&m_writer, UINT32_C(0) );      // dwTotalFrames
+		bx::write(&m_writer, UINT32_C(0) );      // dwInitialFrames
+		bx::write(&m_writer, UINT32_C(1) );      // dwStreams
+		bx::write(&m_writer, UINT32_C(0) );      // dwSuggestedBufferSize
+		bx::write(&m_writer, _width);            // dwWidth
+		bx::write(&m_writer, _height);           // dwHeight
+		bx::write(&m_writer, UINT32_C(0) );      // dwReserved0
+		bx::write(&m_writer, UINT32_C(0) );      // dwReserved1
+		bx::write(&m_writer, UINT32_C(0) );      // dwReserved2
+		bx::write(&m_writer, UINT32_C(0) );      // dwReserved3
+
+		bx::write(&m_writer, BX_MAKEFOURCC('L', 'I', 'S', 'T') );
+		bx::write(&m_writer, UINT32_C(120) );
+		bx::write(&m_writer, BX_MAKEFOURCC('s', 't', 'r', 'l') );
+
+		// AVISTREAMHEADER Structure http://msdn.microsoft.com/en-us/library/ms779638.aspx
+		bx::write(&m_writer, BX_MAKEFOURCC('s', 't', 'r', 'h') );
+		bx::write(&m_writer, UINT32_C(56) );
+		// AVI Stream Headers http://msdn.microsoft.com/en-us/library/ms899423.aspx
+		bx::write(&m_writer, BX_MAKEFOURCC('v', 'i', 'd', 's') ); // fccType
+		bx::write(&m_writer, BX_MAKEFOURCC('D', 'I', 'B', ' ') ); // fccHandler
+		bx::write(&m_writer, UINT32_C(0) );      // dwFlags
+		bx::write(&m_writer, UINT16_C(0) );      // wPriority
+		bx::write(&m_writer, UINT16_C(0) );      // wLanguage
+		bx::write(&m_writer, UINT32_C(0) );      // dwInitialFrames
+		bx::write(&m_writer, UINT32_C(1000) );   // dwScale
+		bx::write(&m_writer, 1000*_fps);         // dwRate
+		bx::write(&m_writer, UINT32_C(0) );      // dwStart
+		bx::write(&m_writer, UINT32_C(0) );      // dwLength
+		bx::write(&m_writer, UINT32_C(0) );      // dwSuggestedBufferSize
+		bx::write(&m_writer, UINT32_C(0) );      // dwQuality
+		bx::write(&m_writer, UINT32_C(0) );      // dwSampleSize
+		bx::write(&m_writer, INT16_C(0) );       // rcFrame.left
+		bx::write(&m_writer, INT16_C(0) );       // rcFrame.top
+		bx::write(&m_writer, INT16_C(0) );       // rcFrame.right
+		bx::write(&m_writer, INT16_C(0) );       // rcFrame.bottom
+
+		bx::write(&m_writer, BX_MAKEFOURCC('s', 't', 'r', 'f') );
+		bx::write(&m_writer, UINT32_C(44) );
+
+		// BITMAPINFOHEADER structure http://msdn.microsoft.com/en-us/library/windows/desktop/dd318229%28v=vs.85%29.aspx
+		bx::write(&m_writer, UINT32_C(40) );     // biSize
+		bx::write(&m_writer, _width);            // biWidth
+		bx::write(&m_writer, _height);           // biHeight
+		bx::write(&m_writer, UINT16_C(1) );      // biPlanes
+		bx::write(&m_writer, UINT16_C(24) );     // biBitCount
+		bx::write(&m_writer, UINT32_C(0) );      // biCompression
+		bx::write(&m_writer, UINT32_C(0) );      // biSizeImage
+		bx::write(&m_writer, UINT32_C(0) );      // biXPelsPerMeter
+		bx::write(&m_writer, UINT32_C(0) );      // biYPelsPerMeter
+		bx::write(&m_writer, UINT32_C(0) );      // biClrUsed
+		bx::write(&m_writer, UINT32_C(0) );      // biClrImportant
+		bx::write(&m_writer, UINT32_C(0) );
+
+		bx::write(&m_writer, BX_MAKEFOURCC('L', 'I', 'S', 'T') );
+		bx::write(&m_writer, UINT32_C(0) );
+		bx::write(&m_writer, BX_MAKEFOURCC('m', 'o', 'v', 'i') );
+
+		return true;
+	}
+
+	void close()
+	{
+		if (NULL != m_frame)
+		{
+			m_writer.close();
+
+			delete [] m_frame;
+			m_frame = NULL;
+			m_frameSize = 0;
+		}
+	}
+
+	void frame(const void* _data)
+	{
+		if (NULL != m_frame)
+		{
+			uint32_t width = m_width;
+			uint32_t height = m_height;
+
+			uint8_t* bgr = &m_frame[8];
+
+			if (m_yflip)
+			{
+				for (uint32_t yy = 0; yy < height; ++yy)
+				{
+					const uint8_t* bgra = (const uint8_t*)_data + (height-1-yy)*width*4;
+
+					for (uint32_t ii = 0; ii < width; ++ii)
+					{
+						bgr[0] = bgra[0];
+						bgr[1] = bgra[1];
+						bgr[2] = bgra[2];
+						bgr += 3;
+						bgra += 4;
+					}
+				}
+			}
+			else
+			{
+				const uint8_t* bgra = (const uint8_t*)_data;
+				for (uint32_t ii = 0, num = m_frameSize/3; ii < num; ++ii)
+				{
+					bgr[0] = bgra[0];
+					bgr[1] = bgra[1];
+					bgr[2] = bgra[2];
+					bgr += 3;
+					bgra += 4;
+				}
+			}
+
+			bx::write(&m_writer, m_frame, m_frameSize+8);
+		}
+	}
+
+	bx::CrtFileWriter m_writer;
+	uint8_t* m_frame;
+	uint32_t m_frameSize;
+	uint32_t m_width;
+	uint32_t m_height;
+	bool m_yflip;
+};
+
+struct BgfxCallback : public bgfx::CallbackI
+{
+	virtual ~BgfxCallback()
+	{
+	}
+
+	virtual void fatal(bgfx::Fatal::Enum _code, const char* _str) BX_OVERRIDE
+	{
+		dbgPrintf("Fatal error: 0x%08x: %s", _code, _str);
+		abort();
+	}
+
+	virtual uint32_t cacheReadSize(uint64_t _id) BX_OVERRIDE
+	{
+		char filePath[256];
+		bx::snprintf(filePath, sizeof(filePath), "%016" PRIx64, _id);
+		FILE* file = fopen(filePath, "rb");
+		if (NULL != file)
+		{
+			uint32_t size = fsize(file);
+			fclose(file);
+			return size;
+		}
+
+		return 0;
+	}
+
+	virtual bool cacheRead(uint64_t _id, void* _data, uint32_t _size) BX_OVERRIDE
+	{
+		char filePath[256];
+		bx::snprintf(filePath, sizeof(filePath), "%016" PRIx64, _id);
+		FILE* file = fopen(filePath, "rb");
+		if (NULL != file)
+		{
+			size_t result = fread(_data, 1, _size, file);
+			fclose(file);
+			return result == _size;
+		}
+
+		return false;
+	}
+
+	virtual void cacheWrite(uint64_t _id, const void* _data, uint32_t _size) BX_OVERRIDE
+	{
+		char filePath[256];
+		bx::snprintf(filePath, sizeof(filePath), "%016" PRIx64, _id);
+
+		FILE* file = fopen(filePath, "wb");
+		if (NULL != file)
+		{
+			fwrite(_data, 1, _size, file);
+			fclose(file);
+		}
+	}
+
+	virtual void screenShot(const char* _filePath, uint32_t _width, uint32_t _height, uint32_t _pitch, const void* _data, uint32_t /*_size*/, bool _yflip) BX_OVERRIDE
+	{
+		saveTga(_filePath, _width, _height, _pitch, _data, false, _yflip);
+	}
+
+	virtual void captureBegin(uint32_t _width, uint32_t _height, uint32_t _pitch, bgfx::TextureFormat::Enum /*_format*/, bool _yflip) BX_OVERRIDE
+	{
+		m_writer = new AviWriter;
+		if (!m_writer->open("capture.avi", _width, _height, 60, _yflip) )
+		{
+			delete m_writer;
+			m_writer = NULL;
+		}
+	}
+
+	virtual void captureEnd() BX_OVERRIDE
+	{
+		if (NULL != m_writer)
+		{
+			m_writer->close();
+		}
+	}
+
+	virtual void captureFrame(const void* _data, uint32_t /*_size*/) BX_OVERRIDE
+	{
+		if (NULL != m_writer)
+		{
+			m_writer->frame(_data);
+		}
+	}
+
+	AviWriter* m_writer;
+};
+
+int _main_(int _argc, char** _argv)
+{
+	BgfxCallback callback;
+
+	bgfx::init(&callback);
+	bgfx::reset(1280, 720, BGFX_RESET_CAPTURE);
+
+	// Enable debug text.
+	bgfx::setDebug(BGFX_DEBUG_TEXT);
+
+	// Set view 0 default viewport.
+	bgfx::setViewRect(0, 0, 0, 1280, 720);
+
+	// Set view 0 clear state.
+	bgfx::setViewClear(0
+		, BGFX_CLEAR_COLOR_BIT|BGFX_CLEAR_DEPTH_BIT
+		, 0x303030ff
+		, 1.0f
+		, 0
+		);
+
+	// Setup root path for binary shaders. Shader binaries are different 
+	// for each renderer.
+	switch (bgfx::getRendererType() )
+	{
+	default:
+	case bgfx::RendererType::Direct3D9:
+		s_shaderPath = "shaders/dx9/";
+		break;
+
+	case bgfx::RendererType::Direct3D11:
+		s_shaderPath = "shaders/dx11/";
+		break;
+
+	case bgfx::RendererType::OpenGL:
+		s_shaderPath = "shaders/glsl/";
+		break;
+
+	case bgfx::RendererType::OpenGLES2:
+	case bgfx::RendererType::OpenGLES3:
+		s_shaderPath = "shaders/gles/";
+		break;
+	}
+
+	// Create vertex stream declaration.
+	s_PosColorDecl.begin();
+	s_PosColorDecl.add(bgfx::Attrib::Position, 3, bgfx::AttribType::Float);
+	s_PosColorDecl.add(bgfx::Attrib::Color0, 4, bgfx::AttribType::Uint8, true);
+	s_PosColorDecl.end();
+
+	const bgfx::Memory* mem;
+
+	// Create static vertex buffer.
+	mem = bgfx::makeRef(s_cubeVertices, sizeof(s_cubeVertices) );
+	bgfx::VertexBufferHandle vbh = bgfx::createVertexBuffer(mem, s_PosColorDecl);
+
+	// Create static index buffer.
+	mem = bgfx::makeRef(s_cubeIndices, sizeof(s_cubeIndices) );
+	bgfx::IndexBufferHandle ibh = bgfx::createIndexBuffer(mem);
+
+	// Load vertex shader.
+	mem = loadShader("vs_callback");
+	bgfx::VertexShaderHandle vsh = bgfx::createVertexShader(mem);
+
+	// Load fragment shader.
+	mem = loadShader("fs_callback");
+	bgfx::FragmentShaderHandle fsh = bgfx::createFragmentShader(mem);
+
+	// Create program from shaders.
+	bgfx::ProgramHandle program = bgfx::createProgram(vsh, fsh);
+
+	// We can destroy vertex and fragment shader here since
+	// their reference is kept inside bgfx after calling createProgram.
+	// Vertex and fragment shader will be destroyed once program is
+	// destroyed.
+	bgfx::destroyVertexShader(vsh);
+	bgfx::destroyFragmentShader(fsh);
+
+	float time = 0.0f;
+
+	// 5 second 60Hz video
+	for (uint32_t frame = 0; frame < 300; ++frame)
+	{
+		// 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::submit(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;
+
+		// Use debug font to print information about this example.
+		bgfx::dbgTextClear();
+		bgfx::dbgTextPrintf( 0, 1, 0x4f, "bgfx/examples/07-callback");
+		bgfx::dbgTextPrintf( 0, 2, 0x6f, "Description: Implementing application specific callbacks for taking screen shots,");
+		bgfx::dbgTextPrintf(13, 3, 0x6f, "caching OpenGL binary shaders, and video capture.");
+		bgfx::dbgTextPrintf( 0, 4, 0x0f, "Frame: % 7.3f[ms]", double(frameTime)*toMs);
+
+		float at[3] = { 0.0f, 0.0f, 0.0f };
+		float eye[3] = { 0.0f, 0.0f, -35.0f };
+		
+		float view[16];
+		float proj[16];
+		mtxLookAt(view, eye, at);
+		mtxProj(proj, 60.0f, 16.0f/9.0f, 0.1f, 100.0f);
+
+		// Set view and projection matrix for view 0.
+		bgfx::setViewTransform(0, view, proj);
+
+		time += 1.0f/60.0f;
+
+		// Submit 11x11 cubes.
+		for (uint32_t yy = 0; yy < 11; ++yy)
+		{
+			for (uint32_t xx = 0; xx < 11-yy; ++xx)
+			{
+				float mtx[16];
+				mtxRotateXY(mtx, time + xx*0.21f, time + yy*0.37f);
+				mtx[12] = -15.0f + float(xx)*3.0f;
+				mtx[13] = -15.0f + float(yy)*3.0f;
+				mtx[14] = 0.0f;
+
+				// Set model matrix for rendering.
+				bgfx::setTransform(mtx);
+
+				// Set vertex and fragment shaders.
+				bgfx::setProgram(program);
+
+				// Set vertex and index buffer.
+				bgfx::setVertexBuffer(vbh);
+				bgfx::setIndexBuffer(ibh);
+
+				// Set render states.
+				bgfx::setState(BGFX_STATE_RGB_WRITE
+					|BGFX_STATE_DEPTH_WRITE
+					|BGFX_STATE_DEPTH_TEST_LESS
+					);
+
+				// Submit primitive for rendering to view 0.
+				bgfx::submit(0);
+			}
+		}
+
+		// Take screenshot at frame 150.
+		if (150 == frame)
+		{
+			bgfx::saveScreenShot("frame150.tga");
+		}
+
+		// Advance to next frame. Rendering thread will be kicked to 
+		// process submitted rendering primitives.
+		bgfx::frame();
+	}
+
+	// Cleanup.
+	bgfx::destroyIndexBuffer(ibh);
+	bgfx::destroyVertexBuffer(vbh);
+	bgfx::destroyProgram(program);
+
+	// Shutdown bgfx.
+	bgfx::shutdown();
+
+	return 0;
+}

examples/07-callback/fs_callback.sc

@@ -0,0 +1,17 @@
+$input v_world, v_color0
+
+/*
+ * Copyright 2011-2012 Branimir Karadzic. All rights reserved.
+ * License: http://www.opensource.org/licenses/BSD-2-Clause
+ */
+
+#include "../common/common.sh"
+
+void main()
+{
+	vec3 normal = normalize(cross(dFdx(v_world), dFdy(v_world) ) );
+	vec3 lightDir = vec3(0.0, 0.0, 1.0);
+	float ndotl = max(dot(normal, lightDir), 0.0);
+	float spec = pow(ndotl, 30.0);
+	gl_FragColor = pow(pow(v_color0, vec4_splat(2.2) ) * ndotl + spec, vec4_splat(1.0/2.2) );
+}

examples/07-callback/makefile

@@ -0,0 +1,17 @@
+#
+# Copyright 2011-2012 Branimir Karadzic. All rights reserved.
+# License: http://www.opensource.org/licenses/BSD-2-Clause
+#
+
+BGFX_DIR=../..
+RUNTIME_DIR=$(BGFX_DIR)/examples/runtime
+BUILD_DIR=../../.build
+
+include $(BGFX_DIR)/premake/shader.mk
+
+rebuild:
+	@make -s --no-print-directory TARGET=0 clean all
+	@make -s --no-print-directory TARGET=1 clean all
+	@make -s --no-print-directory TARGET=2 clean all
+	@make -s --no-print-directory TARGET=3 clean all
+	@make -s --no-print-directory TARGET=4 clean all

examples/07-callback/varying.def.sc

@@ -0,0 +1,5 @@
+vec3 v_world     : TEXCOORD0 = vec3(0.0, 0.0, 0.0);
+vec4 v_color0    : COLOR0    = vec4(1.0, 0.0, 0.0, 1.0);
+
+vec3 a_position  : POSITION;
+vec4 a_color0    : COLOR0;

examples/07-callback/vs_callback.sc

@@ -0,0 +1,16 @@
+$input a_position, a_color0
+$output v_world, v_color0
+
+/*
+ * Copyright 2011-2012 Branimir Karadzic. All rights reserved.
+ * License: http://www.opensource.org/licenses/BSD-2-Clause
+ */
+
+#include "../common/common.sh"
+
+void main()
+{
+	gl_Position = mul(u_modelViewProj, vec4(a_position, 1.0) );
+	v_world = mul(u_model, vec4(a_position, 1.0) ).xyz;
+	v_color0 = a_color0;
+}