1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/oculus2.sln	Tue Aug 26 08:14:09 2014 +0300
     1.3 @@ -0,0 +1,22 @@
     1.4 +
     1.5 +Microsoft Visual Studio Solution File, Format Version 12.00
     1.6 +# Visual Studio 2013
     1.7 +VisualStudioVersion = 12.0.30501.0
     1.8 +MinimumVisualStudioVersion = 10.0.40219.1
     1.9 +Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "oculus2", "oculus2.vcxproj", "{7A2D6788-B885-455C-8DE6-46D5C7313207}"
    1.10 +EndProject
    1.11 +Global
    1.12 +	GlobalSection(SolutionConfigurationPlatforms) = preSolution
    1.13 +		Debug|Win32 = Debug|Win32
    1.14 +		Release|Win32 = Release|Win32
    1.15 +	EndGlobalSection
    1.16 +	GlobalSection(ProjectConfigurationPlatforms) = postSolution
    1.17 +		{7A2D6788-B885-455C-8DE6-46D5C7313207}.Debug|Win32.ActiveCfg = Debug|Win32
    1.18 +		{7A2D6788-B885-455C-8DE6-46D5C7313207}.Debug|Win32.Build.0 = Debug|Win32
    1.19 +		{7A2D6788-B885-455C-8DE6-46D5C7313207}.Release|Win32.ActiveCfg = Release|Win32
    1.20 +		{7A2D6788-B885-455C-8DE6-46D5C7313207}.Release|Win32.Build.0 = Release|Win32
    1.21 +	EndGlobalSection
    1.22 +	GlobalSection(SolutionProperties) = preSolution
    1.23 +		HideSolutionNode = FALSE
    1.24 +	EndGlobalSection
    1.25 +EndGlobal

     2.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     2.2 +++ b/oculus2.vcxproj	Tue Aug 26 08:14:09 2014 +0300
     2.3 @@ -0,0 +1,88 @@
     2.4 +<?xml version="1.0" encoding="utf-8"?>
     2.5 +<Project DefaultTargets="Build" ToolsVersion="12.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
     2.6 +  <ItemGroup Label="ProjectConfigurations">
     2.7 +    <ProjectConfiguration Include="Debug|Win32">
     2.8 +      <Configuration>Debug</Configuration>
     2.9 +      <Platform>Win32</Platform>
    2.10 +    </ProjectConfiguration>
    2.11 +    <ProjectConfiguration Include="Release|Win32">
    2.12 +      <Configuration>Release</Configuration>
    2.13 +      <Platform>Win32</Platform>
    2.14 +    </ProjectConfiguration>
    2.15 +  </ItemGroup>
    2.16 +  <PropertyGroup Label="Globals">
    2.17 +    <ProjectGuid>{7A2D6788-B885-455C-8DE6-46D5C7313207}</ProjectGuid>
    2.18 +    <Keyword>Win32Proj</Keyword>
    2.19 +    <RootNamespace>oculus2</RootNamespace>
    2.20 +  </PropertyGroup>
    2.21 +  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
    2.22 +  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
    2.23 +    <ConfigurationType>Application</ConfigurationType>
    2.24 +    <UseDebugLibraries>true</UseDebugLibraries>
    2.25 +    <PlatformToolset>v120</PlatformToolset>
    2.26 +    <CharacterSet>Unicode</CharacterSet>
    2.27 +  </PropertyGroup>
    2.28 +  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
    2.29 +    <ConfigurationType>Application</ConfigurationType>
    2.30 +    <UseDebugLibraries>false</UseDebugLibraries>
    2.31 +    <PlatformToolset>v120</PlatformToolset>
    2.32 +    <WholeProgramOptimization>true</WholeProgramOptimization>
    2.33 +    <CharacterSet>Unicode</CharacterSet>
    2.34 +  </PropertyGroup>
    2.35 +  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
    2.36 +  <ImportGroup Label="ExtensionSettings">
    2.37 +  </ImportGroup>
    2.38 +  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
    2.39 +    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
    2.40 +  </ImportGroup>
    2.41 +  <ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
    2.42 +    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
    2.43 +  </ImportGroup>
    2.44 +  <PropertyGroup Label="UserMacros" />
    2.45 +  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
    2.46 +    <LinkIncremental>true</LinkIncremental>
    2.47 +  </PropertyGroup>
    2.48 +  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
    2.49 +    <LinkIncremental>false</LinkIncremental>
    2.50 +  </PropertyGroup>
    2.51 +  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
    2.52 +    <ClCompile>
    2.53 +      <PrecompiledHeader>
    2.54 +      </PrecompiledHeader>
    2.55 +      <WarningLevel>Level3</WarningLevel>
    2.56 +      <Optimization>Disabled</Optimization>
    2.57 +      <PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
    2.58 +      <DisableSpecificWarnings>4305;4244</DisableSpecificWarnings>
    2.59 +    </ClCompile>
    2.60 +    <Link>
    2.61 +      <SubSystem>Console</SubSystem>
    2.62 +      <GenerateDebugInformation>true</GenerateDebugInformation>
    2.63 +      <AdditionalDependencies>kernel32.lib;user32.lib;gdi32.lib;winspool.lib;comdlg32.lib;advapi32.lib;shell32.lib;ole32.lib;oleaut32.lib;uuid.lib;odbc32.lib;odbccp32.lib;sdl2.lib;sdl2main.lib;opengl32.lib;glew32.lib;libovrd.lib;winmm.lib;ws2_32.lib;%(AdditionalDependencies)</AdditionalDependencies>
    2.64 +    </Link>
    2.65 +  </ItemDefinitionGroup>
    2.66 +  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
    2.67 +    <ClCompile>
    2.68 +      <WarningLevel>Level3</WarningLevel>
    2.69 +      <PrecompiledHeader>
    2.70 +      </PrecompiledHeader>
    2.71 +      <Optimization>MaxSpeed</Optimization>
    2.72 +      <FunctionLevelLinking>true</FunctionLevelLinking>
    2.73 +      <IntrinsicFunctions>true</IntrinsicFunctions>
    2.74 +      <PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;_LIB;%(PreprocessorDefinitions)</PreprocessorDefinitions>
    2.75 +      <DisableSpecificWarnings>4305;4244</DisableSpecificWarnings>
    2.76 +    </ClCompile>
    2.77 +    <Link>
    2.78 +      <SubSystem>Console</SubSystem>
    2.79 +      <GenerateDebugInformation>true</GenerateDebugInformation>
    2.80 +      <EnableCOMDATFolding>true</EnableCOMDATFolding>
    2.81 +      <OptimizeReferences>true</OptimizeReferences>
    2.82 +      <AdditionalDependencies>kernel32.lib;user32.lib;gdi32.lib;winspool.lib;comdlg32.lib;advapi32.lib;shell32.lib;ole32.lib;oleaut32.lib;uuid.lib;odbc32.lib;odbccp32.lib;sdl2.lib;sdl2main.lib;opengl32.lib;glew32.lib;libovr.lib;winmm.lib;ws2_32.lib;%(AdditionalDependencies)</AdditionalDependencies>
    2.83 +    </Link>
    2.84 +  </ItemDefinitionGroup>
    2.85 +  <ItemGroup>
    2.86 +    <ClCompile Include="src\main.c" />
    2.87 +  </ItemGroup>
    2.88 +  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
    2.89 +  <ImportGroup Label="ExtensionTargets">
    2.90 +  </ImportGroup>
    2.91 +</Project>
    2.92 \ No newline at end of file

     3.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     3.2 +++ b/oculus2.vcxproj.filters	Tue Aug 26 08:14:09 2014 +0300
     3.3 @@ -0,0 +1,14 @@
     3.4 +<?xml version="1.0" encoding="utf-8"?>
     3.5 +<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
     3.6 +  <ItemGroup>
     3.7 +    <Filter Include="src">
     3.8 +      <UniqueIdentifier>{4FC737F1-C7A5-4376-A066-2A32D752A2FF}</UniqueIdentifier>
     3.9 +      <Extensions>cpp;c;cc;cxx;def;odl;idl;hpj;bat;asm;asmx;h;inl</Extensions>
    3.10 +    </Filter>
    3.11 +  </ItemGroup>
    3.12 +  <ItemGroup>
    3.13 +    <ClCompile Include="src\main.c">
    3.14 +      <Filter>src</Filter>
    3.15 +    </ClCompile>
    3.16 +  </ItemGroup>
    3.17 +</Project>
    3.18 \ No newline at end of file

     4.1 --- a/src/main.c	Tue Aug 26 02:56:45 2014 +0300
     4.2 +++ b/src/main.c	Tue Aug 26 08:14:09 2014 +0300
     4.3 @@ -1,14 +1,24 @@
     4.4  #include <stdio.h>
     4.5  #include <stdlib.h>
     4.6 +#include <assert.h>
     4.7  #include <SDL2/SDL.h>
     4.8  #include <GL/glew.h>
     4.9  
    4.10 +#ifdef WIN32
    4.11 +#define OVR_OS_WIN32
    4.12 +#endif
    4.13 +#ifdef __APPLE__
    4.14 +#define OVR_OS_MAC
    4.15 +#endif
    4.16 +
    4.17  #include <OVR_CAPI.h>
    4.18  #include <OVR_CAPI_GL.h>
    4.19  
    4.20 -int init();
    4.21 -void cleanup();
    4.22 -void display();
    4.23 +int init(void);
    4.24 +void cleanup(void);
    4.25 +void display(void);
    4.26 +void draw_scene(void);
    4.27 +void draw_box(float xsz, float ysz, float zsz, float norm_sign);
    4.28  void update_rtarg(int width, int height);
    4.29  int handle_event(SDL_Event *ev);
    4.30  int key_event(int key, int state);
    4.31 @@ -19,6 +29,7 @@
    4.32  
    4.33  static SDL_Window *win;
    4.34  static SDL_GLContext ctx;
    4.35 +static int win_width, win_height;
    4.36  
    4.37  static unsigned int fbo, fb_tex, fb_depth;
    4.38  static int fb_width, fb_height;
    4.39 @@ -26,6 +37,8 @@
    4.40  
    4.41  static ovrHmd hmd;
    4.42  static ovrSizei eyeres[2];
    4.43 +static ovrEyeRenderDesc eye_rdesc[2];
    4.44 +static ovrGLTexture fb_ovr_tex[2];
    4.45  
    4.46  
    4.47  int main(void)
    4.48 @@ -52,12 +65,11 @@
    4.49  }
    4.50  
    4.51  
    4.52 -int init()
    4.53 +int init(void)
    4.54  {
    4.55 -	int x, y;
    4.56 +	int i, x, y;
    4.57  	unsigned int flags, dcaps;
    4.58  	union ovrGLConfig glcfg;
    4.59 -	ovrEyeRenderDesc eye_rdesc[2];
    4.60  
    4.61  	// this must be called before any OpenGL init according to the docs
    4.62  	ovr_Initialize();
    4.63 @@ -65,7 +77,7 @@
    4.64  	SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER);
    4.65  
    4.66  	x = y = SDL_WINDOWPOS_UNDEFINED;
    4.67 -	flags = SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE;
    4.68 +	flags = SDL_WINDOW_OPENGL;
    4.69  	if(!(win = SDL_CreateWindow("simple oculus example", x, y, 1280, 800, flags))) {
    4.70  		fprintf(stderr, "failed to create window\n");
    4.71  		return -1;
    4.72 @@ -79,23 +91,37 @@
    4.73  
    4.74  	if(!(hmd = ovrHmd_Create(0))) {
    4.75  		fprintf(stderr, "failed to open Oculus HMD, falling back to virtual debug HMD\n");
    4.76 -		if(!(hmd = ovrHmd_CreateDebug())) {
    4.77 +		if(!(hmd = ovrHmd_CreateDebug(ovrHmd_DK2))) {
    4.78  			fprintf(stderr, "failed to create virtual debug HMD\n");
    4.79  			return -1;
    4.80  		}
    4.81  	}
    4.82  	printf("initialized HMD: %s - %s\n", hmd->Manufacturer, hmd->ProductName);
    4.83  
    4.84 -	SDL_SetWindowSize(hmd->Resolution.w, hmd->Resolution.h);
    4.85 +	SDL_SetWindowSize(win, hmd->Resolution.w, hmd->Resolution.h);
    4.86  
    4.87  	ovrHmd_ConfigureTracking(hmd, 0xffffffff, 0);
    4.88  	eyeres[0] = ovrHmd_GetFovTextureSize(hmd, ovrEye_Left, hmd->DefaultEyeFov[0], 1.0);
    4.89  	eyeres[1] = ovrHmd_GetFovTextureSize(hmd, ovrEye_Right, hmd->DefaultEyeFov[1], 1.0);
    4.90  
    4.91 -	fb_width = eyeres[0].w + eyres[1].w;
    4.92 +	SDL_GetWindowSize(win, &win_width, &win_height);
    4.93 +
    4.94 +	fb_width = eyeres[0].w + eyeres[1].w;
    4.95  	fb_height = eyeres[0].h > eyeres[1].h ? eyeres[0].h : eyeres[1].h;
    4.96  	update_rtarg(fb_width, fb_height);
    4.97  
    4.98 +	for(i=0; i<2; i++) {
    4.99 +		fb_ovr_tex[i].OGL.Header.API = ovrRenderAPI_OpenGL;
   4.100 +		fb_ovr_tex[i].OGL.Header.TextureSize.w = fb_tex_width;
   4.101 +		fb_ovr_tex[i].OGL.Header.TextureSize.h = fb_tex_height;
   4.102 +		fb_ovr_tex[i].OGL.Header.RenderViewport.Pos.y = 0;
   4.103 +		fb_ovr_tex[i].OGL.Header.RenderViewport.Size.w = fb_width / 2.0;
   4.104 +		fb_ovr_tex[i].OGL.Header.RenderViewport.Size.h = fb_height;
   4.105 +		fb_ovr_tex[i].OGL.TexId = fb_tex;
   4.106 +	}
   4.107 +	fb_ovr_tex[0].OGL.Header.RenderViewport.Pos.x = 0;
   4.108 +	fb_ovr_tex[1].OGL.Header.RenderViewport.Pos.x = fb_width / 2.0;
   4.109 +
   4.110  	memset(&glcfg, 0, sizeof glcfg);
   4.111  	glcfg.OGL.Header.API = ovrRenderAPI_OpenGL;
   4.112  	glcfg.OGL.Header.RTSize = hmd->Resolution;
   4.113 @@ -104,19 +130,22 @@
   4.114  	if(hmd->HmdCaps & ovrHmdCap_ExtendDesktop) {
   4.115  		printf("running in \"extended desktop\" mode\n");
   4.116  	} else {
   4.117 +#ifdef WIN32
   4.118 +		void *sys_win = GetActiveWindow();
   4.119 +		glcfg.OGL.Window = sys_win;
   4.120 +		glcfg.OGL.DC = wglGetCurrentDC();
   4.121 +		ovrHmd_AttachToWindow(hmd, sys_win, 0, 0);
   4.122 +#endif
   4.123  		printf("running in \"direct-hmd\" mode\n");
   4.124 -#ifdef WIN32
   4.125 -		ovrHmd_AttachToWindow(hmd, GetActiveWindow(), 0, 0);
   4.126 -#endif
   4.127  	}
   4.128 -	ovrHmd_SetEnabledCaps(hmd, ovrHmdCap_LowPersistence | ovrHmdCaps_DynamicPrediction);
   4.129 +	ovrHmd_SetEnabledCaps(hmd, ovrHmdCap_LowPersistence | ovrHmdCap_DynamicPrediction);
   4.130  
   4.131 -	dcaps = ovrDistortionCap_Chromatic | ovrDistortionCap_Vignette | ovrDistortionCap_TimeWrap;
   4.132 +	dcaps = ovrDistortionCap_Chromatic | ovrDistortionCap_Vignette | ovrDistortionCap_TimeWarp;
   4.133  	if(!ovrHmd_ConfigureRendering(hmd, &glcfg.Config, dcaps, hmd->DefaultEyeFov, eye_rdesc)) {
   4.134  		fprintf(stderr, "failed to configure distortion renderer\n");
   4.135  	}
   4.136  
   4.137 -	ovrhmd_EnableHSWDisplaySDKRender(hmd, 0);
   4.138 +	/* ovrhmd_EnableHSWDisplaySDKRender(hmd, 0); */
   4.139  
   4.140  
   4.141  	glEnable(GL_DEPTH_TEST);
   4.142 @@ -124,12 +153,12 @@
   4.143  	glEnable(GL_LIGHTING);
   4.144  	glEnable(GL_LIGHT0);
   4.145  
   4.146 -	glClearColor(0.05, 0.05, 0.05, 1);
   4.147 +	glClearColor(0.5, 0.05, 0.05, 1);
   4.148  
   4.149  	return 0;
   4.150  }
   4.151  
   4.152 -void cleanup()
   4.153 +void cleanup(void)
   4.154  {
   4.155  	if(hmd) {
   4.156  		ovrHmd_Destroy(hmd);
   4.157 @@ -139,11 +168,108 @@
   4.158  	SDL_Quit();
   4.159  }
   4.160  
   4.161 -void display()
   4.162 +void display(void)
   4.163  {
   4.164 +	int i;
   4.165 +	ovrMatrix4f proj;
   4.166 +	ovrPosef pose[2];
   4.167 +
   4.168 +	ovrHmd_BeginFrame(hmd, 0);
   4.169 +
   4.170 +	glBindFramebuffer(GL_FRAMEBUFFER, fbo);
   4.171  	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
   4.172  
   4.173 -	SDL_GL_SwapWindow(win);
   4.174 +	/* for each eye ... */
   4.175 +	for(i=0; i<2; i++) {
   4.176 +		int eye = hmd->EyeRenderOrder[i];
   4.177 +
   4.178 +		/* vport0(0, 0, width/2, height), vport1(width/2, 0, width/2, height) */
   4.179 +		glViewport(eye == 0 ? 0 : fb_width / 2, 0, fb_width / 2, fb_height);
   4.180 +
   4.181 +		proj = ovrMatrix4f_Projection(hmd->DefaultEyeFov[eye], 0.5, 500.0, 1);
   4.182 +		glMatrixMode(GL_PROJECTION);
   4.183 +		glLoadMatrixf(proj.M[0]);
   4.184 +
   4.185 +		pose[eye] = ovrHmd_GetEyePose(hmd, eye);
   4.186 +		glMatrixMode(GL_MODELVIEW);
   4.187 +		/* TODO: get HMD orientation data and use them */
   4.188 +		glTranslatef(0, -ovrHmd_GetFloat(hmd, OVR_KEY_EYE_HEIGHT, 1.65), 0);
   4.189 +
   4.190 +		draw_scene();
   4.191 +	}
   4.192 +
   4.193 +	glBindFramebuffer(GL_FRAMEBUFFER, 0);
   4.194 +	glViewport(0, 0, win_width, win_height);
   4.195 +
   4.196 +	ovrHmd_EndFrame(hmd, pose, &fb_ovr_tex[0].Texture);
   4.197 +
   4.198 +	assert(glGetError() == GL_NO_ERROR);
   4.199 +}
   4.200 +
   4.201 +void draw_scene(void)
   4.202 +{
   4.203 +	int i;
   4.204 +	float lpos[] = {0, 5, 0, 1};
   4.205 +	glLightfv(GL_LIGHT0, GL_POSITION, lpos);
   4.206 +
   4.207 +	glTranslatef(0, 5, 0);
   4.208 +	draw_box(20, 10, 20, -1.0);
   4.209 +
   4.210 +	for(i=0; i<4; i++) {
   4.211 +		glPushMatrix();
   4.212 +		if(i & 1) {
   4.213 +			glTranslatef(0, 0, i & 2 ? 7.5 : -7.5);
   4.214 +		} else {
   4.215 +			glTranslatef(i & 2 ? 7.5 : -7.5, 0, 0);
   4.216 +		}
   4.217 +		draw_box(3, 0, 3, 1.0);
   4.218 +		glPopMatrix();
   4.219 +	}
   4.220 +}
   4.221 +
   4.222 +void draw_box(float xsz, float ysz, float zsz, float norm_sign)
   4.223 +{
   4.224 +	glMatrixMode(GL_MODELVIEW);
   4.225 +	glScalef(xsz * 0.5, ysz * 0.5, zsz * 0.5);
   4.226 +
   4.227 +	if(norm_sign < 0.0) {
   4.228 +		glFrontFace(GL_CW);
   4.229 +	}
   4.230 +
   4.231 +	glBegin(GL_QUADS);
   4.232 +	glNormal3f(0, 0, 1 * norm_sign);
   4.233 +	glTexCoord2f(0, 0); glVertex3f(-1, -1, 1);
   4.234 +	glTexCoord2f(1, 0); glVertex3f(1, -1, 1);
   4.235 +	glTexCoord2f(1, 1); glVertex3f(1, 1, 1);
   4.236 +	glTexCoord2f(0, 1); glVertex3f(-1, 1, 1);
   4.237 +	glNormal3f(1 * norm_sign, 0, 0);
   4.238 +	glTexCoord2f(0, 0); glVertex3f(1, -1, 1);
   4.239 +	glTexCoord2f(1, 0); glVertex3f(1, -1, -1);
   4.240 +	glTexCoord2f(1, 1); glVertex3f(1, 1, -1);
   4.241 +	glTexCoord2f(0, 1); glVertex3f(1, 1, 1);
   4.242 +	glNormal3f(0, 0, -1 * norm_sign);
   4.243 +	glTexCoord2f(0, 0); glVertex3f(1, -1, -1);
   4.244 +	glTexCoord2f(1, 0); glVertex3f(-1, -1, -1);
   4.245 +	glTexCoord2f(1, 1); glVertex3f(-1, 1, -1);
   4.246 +	glTexCoord2f(0, 1); glVertex3f(1, 1, -1);
   4.247 +	glNormal3f(-1 * norm_sign, 0, 0);
   4.248 +	glTexCoord2f(0, 0); glVertex3f(-1, -1, -1);
   4.249 +	glTexCoord2f(1, 0); glVertex3f(-1, -1, 1);
   4.250 +	glTexCoord2f(1, 1); glVertex3f(-1, 1, 1);
   4.251 +	glTexCoord2f(0, 1); glVertex3f(-1, 1, -1);
   4.252 +	glNormal3f(0, 1 * norm_sign, 0);
   4.253 +	glTexCoord2f(0, 0); glVertex3f(-1, 1, 1);
   4.254 +	glTexCoord2f(1, 0); glVertex3f(1, 1, 1);
   4.255 +	glTexCoord2f(1, 1); glVertex3f(1, 1, -1);
   4.256 +	glTexCoord2f(0, 1); glVertex3f(-1, 1, -1);
   4.257 +	glNormal3f(0, -1 * norm_sign, 0);
   4.258 +	glTexCoord2f(0, 0); glVertex3f(-1, -1, -1);
   4.259 +	glTexCoord2f(1, 0); glVertex3f(1, -1, -1);
   4.260 +	glTexCoord2f(1, 1); glVertex3f(1, -1, 1);
   4.261 +	glTexCoord2f(0, 1); glVertex3f(-1, -1, 1);
   4.262 +	glEnd();
   4.263 +
   4.264 +	glFrontFace(GL_CCW);
   4.265  }
   4.266  
   4.267  void update_rtarg(int width, int height)
   4.268 @@ -210,3 +336,14 @@
   4.269  	}
   4.270  	return 0;
   4.271  }
   4.272 +
   4.273 +unsigned int next_pow2(unsigned int x)
   4.274 +{
   4.275 +	x -= 1;
   4.276 +	x |= x >> 1;
   4.277 +	x |= x >> 2;
   4.278 +	x |= x >> 4;
   4.279 +	x |= x >> 8;
   4.280 +	x |= x >> 16;
   4.281 +	return x + 1;
   4.282 +}
   4.283 \ No newline at end of file