public static void EnableOpenGL(IntPtr ghDC)
{
int PixFormat; // pixed format
// Pixed descriptor
Gdi.PIXELFORMATDESCRIPTOR pfd = new Gdi.PIXELFORMATDESCRIPTOR();
// Set memory
//ZeroMemory(pfd, Microsoft.VisualBasic.Strings.Len(pfd));
// Pixel descriptor configuration
pfd.nSize = (short)Microsoft.VisualBasic.Strings.Len(pfd);
pfd.nVersion = 1;
pfd.dwFlags = Gdi.PFD_DRAW_TO_WINDOW | Gdi.PFD_SUPPORT_OPENGL | Gdi.PFD_DOUBLEBUFFER;
pfd.iPixelType = Gdi.PFD_TYPE_RGBA;
pfd.cColorBits = 24;
pfd.cDepthBits = 32;
pfd.cAlphaBits = 24;
pfd.iLayerType = Gdi.PFD_MAIN_PLANE;
// Chose pixel format
PixFormat = Gdi.ChoosePixelFormat((IntPtr)ghDC, ref pfd);
// If the operation failed let user know
if (PixFormat == 0)
{
//MessageBox.Show("Can't create OpenGL context!", "Saturn", MessageBoxButtons.OK, MessageBoxIcon.Error);
enable = false;
return;
}
if (!Gdi.SetPixelFormat((IntPtr)ghDC, PixFormat, ref pfd))
{
//MessageBox.Show("Unable to set pixel format", "Saturn", MessageBoxButtons.OK, MessageBoxIcon.Error);
enable = false;
return;
}
// Set graphic context
hRC = Wgl.wglCreateContext(ghDC);
// If the operation failed let user know
if (hRC.ToInt32() == 0)
{
//MessageBox.Show("Unable to get rendering context", "Saturn", MessageBoxButtons.OK, MessageBoxIcon.Error);
enable = false;
return;
}
if (!(Wgl.wglMakeCurrent(ghDC, hRC)))
{
//MessageBox.Show("Unable to make rendering context current", "Saturn", MessageBoxButtons.OK, MessageBoxIcon.Error);
enable = false;
return;
}
enable = true; // GL has been enabled
}
protected override void OnHandleCreated(EventArgs e)
{
base.OnHandleCreated(e);
this.SetStyle(ControlStyles.UserPaint, true);
this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);
this.SetStyle(ControlStyles.DoubleBuffer, false);
this.SetStyle(ControlStyles.Opaque, true);
this.SetStyle(ControlStyles.ResizeRedraw, true);
Gdi.PIXELFORMATDESCRIPTOR pfd = new Gdi.PIXELFORMATDESCRIPTOR();
pfd.dwFlags = Gdi.PFD_SUPPORT_OPENGL | Gdi.PFD_DRAW_TO_WINDOW | Gdi.PFD_DOUBLEBUFFER; // OpenGLをサポート | ウィンドウに描画 | ダブルバッファ
pfd.iPixelType = Gdi.PFD_TYPE_RGBA; //RGBAフォーマット
pfd.cColorBits = 32; // 32bit/pixel
pfd.cAlphaBits = 8; // アルファチャンネル8bit (0にするとアルファチャンネル無しになる)
pfd.cDepthBits = 16; // デプスバッファ16bit
this.hDC = User.GetDC(this.Handle); // デバイスコンテキストのハンドルを取得
int pixFormat = Gdi.ChoosePixelFormat(this.hDC, ref pfd); // ピクセルフォーマットを選択
if (pixFormat <= 0)
{
throw new Exception("ChoosePixelFormat failed.");
}
Wgl.wglDescribePixelFormat(this.hDC, pixFormat, 40, ref pfd); //ピクセルフォーマットの正確な設定を取得
bool valid = Gdi.SetPixelFormat(this.hDC, pixFormat, ref pfd); //デバイスコンテキストにピクセルフォーマットを設定
if (!valid)
{
throw new Exception("SetPixelFormat failed");
}
this.hRC = Wgl.wglCreateContext(this.hDC); //OpenGLのレンダリングコンテキストを作成
if (this.hRC == IntPtr.Zero)
{
throw new Exception("wglCreateContext failed.");
}
Wgl.wglMakeCurrent(this.hDC, this.hRC); //作成したコンテキストをカレントに設定
//レンダリングコンテキストを作成、カレントに設定したら、１度だけこれを呼び出しておく
//Tao.OpenGl.GL、Tao.Platform.Windows.WGLの仕様。
Gl.ReloadFunctions();
Wgl.ReloadFunctions();
int err = Gl.glGetError();
if (err != Gl.GL_NO_ERROR)
{
throw new Exception("Error code = " + err.ToString());
}
this.SetupGL();
}
/// <summary>
/// Initializes an OpenGL context with the associated Win32 device context</summary>
/// <param name="hdc">HDC from the window to which the new OpenGL context is bound</param>
/// <param name="hglrc">Handle to the new OpenGL context</param>
public static void InitOpenGl(IntPtr hdc, out IntPtr hglrc)
{
Gdi.PIXELFORMATDESCRIPTOR pfd = new Gdi.PIXELFORMATDESCRIPTOR();
PopulatePixelFormatDescriptor(ref pfd);
// Attempt To Find An Appropriate Pixel Format
int pixelFormat = Gdi.ChoosePixelFormat(hdc, ref pfd);
if (pixelFormat == 0)
throw new InvalidOperationException("Can't find a suitable PixelFormat");
// Attempt To Set The Pixel Format?
if (!Gdi.SetPixelFormat(hdc, pixelFormat, ref pfd))
throw new InvalidOperationException("Can't set the PixelFormat");
// Attempt To Get The Rendering Context
hglrc = Wgl.wglCreateContext(hdc);
if (hglrc == IntPtr.Zero)
throw new InvalidOperationException("Can't create GL rendering context");
if (s_sharedHglrc == IntPtr.Zero)
s_sharedHglrc = hglrc;
else
{
// We don't throw an exception on failure because the caller may be on another thread or is
// using a different pixel format.
Wgl.wglShareLists(s_sharedHglrc, hglrc);
}
if (!Wgl.wglMakeCurrent(hdc, hglrc))
throw new InvalidOperationException("Can't make the OpenGL rendering context to be the current context.");
// Load all extensions for mainline rendering
if (!s_initialized)
{
LoadAllExtensions();
s_initialized = true;
}
// Init fonts
using (Font defaultFont = SystemFonts.DefaultFont)
{
Gdi.SelectObject(hdc, defaultFont.ToHfont());
}
foreach (IntSet.Range range in s_fontMap.Ranges)
{
int baseDisplayListId = range.PreviousItemsCount + TEXT_DISPLAY_LIST_BASE;
if (!wglUseFontBitmaps(hdc, range.Min, range.Count, (uint)baseDisplayListId))
throw new InvalidOperationException("Font bitmaps were unable to be created.");
}
s_fontMap.Lock();
Util3D.ReportErrors();
}
private void SetupGL()
{
_hDC = User.GetDC( _controlHandle );
Debug.Assert( _hDC != IntPtr.Zero );
if( _hDC == IntPtr.Zero )
return;
Gdi.PIXELFORMATDESCRIPTOR pfd = new Gdi.PIXELFORMATDESCRIPTOR();
//ZeroMemory( &pfd, sizeof( pfd ) );
pfd.nSize = ( short )sizeof( Gdi.PIXELFORMATDESCRIPTOR );
pfd.nVersion = 1;
pfd.dwFlags = Gdi.PFD_DRAW_TO_WINDOW | Gdi.PFD_SUPPORT_OPENGL | Gdi.PFD_TYPE_RGBA;
#if VSYNC
//pfd.dwFlags |= Gdi.PFD_DOUBLEBUFFER;
#endif
pfd.iPixelType = Gdi.PFD_TYPE_RGBA;
pfd.cColorBits = 24;
pfd.cDepthBits = 32;
pfd.iLayerType = Gdi.PFD_MAIN_PLANE;
int iFormat = Gdi.ChoosePixelFormat( _hDC, ref pfd );
bool spf = Gdi.SetPixelFormat( _hDC, iFormat, ref pfd );
Wgl.wglMakeCurrent( IntPtr.Zero, IntPtr.Zero );
_hRC = Wgl.wglCreateContext( _hDC );
Debug.Assert( _hRC != IntPtr.Zero );
if( _hRC == IntPtr.Zero )
{
User.ReleaseDC( _controlHandle, _hDC );
_hDC = IntPtr.Zero;
return;
}
bool mc = Wgl.wglMakeCurrent( _hDC, _hRC );
Gl.glShadeModel( Gl.GL_SMOOTH );
Gl.glClearColor( 0.0f, 0.5f, 0.5f, 1.0f );
Gl.glClearDepth( 0.0f );
//Gl.glEnable( Gl.GL_DEPTH_TEST );
Gl.glDepthFunc( Gl.GL_LEQUAL );
Gl.glDepthRange( 1.0f, 0.0f );
Gl.glAlphaFunc( Gl.GL_GREATER, 0.03f );
Gl.glHint( Gl.GL_PERSPECTIVE_CORRECTION_HINT, Gl.GL_NICEST );
Gl.glFogi( Gl.GL_FOG_MODE, Gl.GL_LINEAR );
Gl.glFogf( Gl.GL_FOG_DENSITY, 0.1f );
Gl.glHint( Gl.GL_FOG_HINT, Gl.GL_DONT_CARE );
#if !VSYNC
Wgl.wglSwapIntervalEXT( 0 );
#endif
this.Resize( _screenWidth, _screenHeight );
_defaultProgram = new DefaultProgram();
_defaultProgram.Prepare();
}
/// <summary>
/// Creates our OpenGL Window.
/// </summary>
/// <param name="title">
/// The title to appear at the top of the window.
/// </param>
/// <param name="width">
/// The width of the GL window or fullscreen mode.
/// </param>
/// <param name="height">
/// The height of the GL window or fullscreen mode.
/// </param>
/// <param name="bits">
/// The number of bits to use for color (8/16/24/32).
/// </param>
/// <param name="fullscreenflag">
/// Use fullscreen mode (<c>true</c>) or windowed mode (<c>false</c>).
/// </param>
/// <returns>
/// <c>true</c> on successful window creation, otherwise <c>false</c>.
/// </returns>
private static bool CreateGLWindow(string title, int width, int height, int bits, bool fullscreenflag)
{
int pixelFormat; // Holds The Results After Searching For A Match
fullscreen = fullscreenflag; // Set The Global Fullscreen Flag
form = null; // Null The Form
GC.Collect(); // Request A Collection
// This Forces A Swap
Kernel.SetProcessWorkingSetSize(Process.GetCurrentProcess().Handle, -1, -1);
if(fullscreen) { // Attempt Fullscreen Mode?
Gdi.DEVMODE dmScreenSettings = new Gdi.DEVMODE(); // Device Mode
// Size Of The Devmode Structure
dmScreenSettings.dmSize = (short) Marshal.SizeOf(dmScreenSettings);
dmScreenSettings.dmPelsWidth = width; // Selected Screen Width
dmScreenSettings.dmPelsHeight = height; // Selected Screen Height
dmScreenSettings.dmBitsPerPel = bits; // Selected Bits Per Pixel
dmScreenSettings.dmFields = Gdi.DM_BITSPERPEL | Gdi.DM_PELSWIDTH | Gdi.DM_PELSHEIGHT;
// Try To Set Selected Mode And Get Results. NOTE: CDS_FULLSCREEN Gets Rid Of Start Bar.
if(User.ChangeDisplaySettings(ref dmScreenSettings, User.CDS_FULLSCREEN) != User.DISP_CHANGE_SUCCESSFUL) {
// If The Mode Fails, Offer Two Options. Quit Or Use Windowed Mode.
if(MessageBox.Show("The Requested Fullscreen Mode Is Not Supported By\nYour Video Card. Use Windowed Mode Instead?", "NeHe GL",
MessageBoxButtons.YesNo, MessageBoxIcon.Exclamation) == DialogResult.Yes) {
fullscreen = false; // Windowed Mode Selected. Fullscreen = false
}
else {
// Pop up A Message Box Lessing User Know The Program Is Closing.
MessageBox.Show("Program Will Now Close.", "ERROR", MessageBoxButtons.OK, MessageBoxIcon.Stop);
return false; // Return false
}
}
}
form = new Lesson13(); // Create The Window
if(fullscreen) { // Are We Still In Fullscreen Mode?
form.FormBorderStyle = FormBorderStyle.None; // No Border
Cursor.Hide(); // Hide Mouse Pointer
}
else { // If Windowed
form.FormBorderStyle = FormBorderStyle.Sizable; // Sizable
Cursor.Show(); // Show Mouse Pointer
}
form.Width = width; // Set Window Width
form.Height = height; // Set Window Height
form.Text = title; // Set Window Title
Gdi.PIXELFORMATDESCRIPTOR pfd = new Gdi.PIXELFORMATDESCRIPTOR(); // pfd Tells Windows How We Want Things To Be
pfd.nSize = (short) Marshal.SizeOf(pfd); // Size Of This Pixel Format Descriptor
pfd.nVersion = 1; // Version Number
pfd.dwFlags = Gdi.PFD_DRAW_TO_WINDOW | // Format Must Support Window
Gdi.PFD_SUPPORT_OPENGL | // Format Must Support OpenGL
Gdi.PFD_DOUBLEBUFFER; // Format Must Support Double Buffering
pfd.iPixelType = (byte) Gdi.PFD_TYPE_RGBA; // Request An RGBA Format
pfd.cColorBits = (byte) bits; // Select Our Color Depth
pfd.cRedBits = 0; // Color Bits Ignored
pfd.cRedShift = 0;
pfd.cGreenBits = 0;
pfd.cGreenShift = 0;
pfd.cBlueBits = 0;
pfd.cBlueShift = 0;
pfd.cAlphaBits = 0; // No Alpha Buffer
pfd.cAlphaShift = 0; // Shift Bit Ignored
pfd.cAccumBits = 0; // No Accumulation Buffer
pfd.cAccumRedBits = 0; // Accumulation Bits Ignored
pfd.cAccumGreenBits = 0;
pfd.cAccumBlueBits = 0;
pfd.cAccumAlphaBits = 0;
pfd.cDepthBits = 16; // 16Bit Z-Buffer (Depth Buffer)
pfd.cStencilBits = 0; // No Stencil Buffer
pfd.cAuxBuffers = 0; // No Auxiliary Buffer
pfd.iLayerType = (byte) Gdi.PFD_MAIN_PLANE; // Main Drawing Layer
pfd.bReserved = 0; // Reserved
pfd.dwLayerMask = 0; // Layer Masks Ignored
pfd.dwVisibleMask = 0;
pfd.dwDamageMask = 0;
hDC = User.GetDC(form.Handle); // Attempt To Get A Device Context
if(hDC == IntPtr.Zero) { // Did We Get A Device Context?
KillGLWindow(); // Reset The Display
MessageBox.Show("Can't Create A GL Device Context.", "ERROR",
MessageBoxButtons.OK, MessageBoxIcon.Error);
return false;
}
pixelFormat = Gdi.ChoosePixelFormat(hDC, ref pfd); // Attempt To Find An Appropriate Pixel Format
if(pixelFormat == 0) { // Did Windows Find A Matching Pixel Format?
KillGLWindow(); // Reset The Display
MessageBox.Show("Can't Find A Suitable PixelFormat.", "ERROR",
MessageBoxButtons.OK, MessageBoxIcon.Error);
return false;
}
if(!Gdi.SetPixelFormat(hDC, pixelFormat, ref pfd)) { // Are We Able To Set The Pixel Format?
KillGLWindow(); // Reset The Display
MessageBox.Show("Can't Set The PixelFormat.", "ERROR",
MessageBoxButtons.OK, MessageBoxIcon.Error);
return false;
}
hRC = Wgl.wglCreateContext(hDC); // Attempt To Get The Rendering Context
if(hRC == IntPtr.Zero) { // Are We Able To Get A Rendering Context?
KillGLWindow(); // Reset The Display
MessageBox.Show("Can't Create A GL Rendering Context.", "ERROR",
MessageBoxButtons.OK, MessageBoxIcon.Error);
return false;
}
if(!Wgl.wglMakeCurrent(hDC, hRC)) { // Try To Activate The Rendering Context
KillGLWindow(); // Reset The Display
MessageBox.Show("Can't Activate The GL Rendering Context.", "ERROR",
MessageBoxButtons.OK, MessageBoxIcon.Error);
return false;
}
form.Show(); // Show The Window
form.TopMost = true; // Topmost Window
form.Focus(); // Focus The Window
if(fullscreen) { // This Shouldn't Be Necessary, But Is
Cursor.Hide();
}
ReSizeGLScene(width, height); // Set Up Our Perspective GL Screen
if(!InitGL()) { // Initialize Our Newly Created GL Window
KillGLWindow(); // Reset The Display
MessageBox.Show("Initialization Failed.", "ERROR",
MessageBoxButtons.OK, MessageBoxIcon.Error);
return false;
}
return true; // Success
}
/// <summary>
/// Creates our OpenGl Window.
/// </summary>
/// <param name="title">
/// The title to appear at the top of the window.
/// </param>
/// <param name="width">
/// The width of the Gl window or fullscreen mode.
/// </param>
/// <param name="height">
/// The height of the Gl window or fullscreen mode.
/// </param>
/// <param name="bits">
/// The number of bits to use for color (8/16/24/32).
/// </param>
/// <param name="fullscreenflag">
/// Use fullscreen mode (<c>true</c>) or windowed mode (<c>false</c>).
/// </param>
/// <returns>
/// <c>true</c> on successful window creation, otherwise <c>false</c>.
/// </returns>
private static bool CreateGlWindow(string title, int width, int height, int bits, bool fullscreenflag)
{
int pixelFormat; // Holds The Results After Searching For A Match
fullscreen = fullscreenflag; // Set The Global Fullscreen Flag
form = null; // Null The Form
GC.Collect(); // Request A Collection
// This Forces A Swap
Kernel.SetProcessWorkingSetSize(Process.GetCurrentProcess().Handle, -1, -1);
if (fullscreen)
{ // Attempt Fullscreen Mode?
Gdi.DEVMODE dmScreenSettings = new Gdi.DEVMODE(); // Device Mode
// Size Of The Devmode Structure
dmScreenSettings.dmSize = (short)Marshal.SizeOf(dmScreenSettings);
dmScreenSettings.dmPelsWidth = width; // Selected Screen Width
dmScreenSettings.dmPelsHeight = height; // Selected Screen Height
dmScreenSettings.dmBitsPerPel = bits; // Selected Bits Per Pixel
dmScreenSettings.dmFields = Gdi.DM_BITSPERPEL | Gdi.DM_PELSWIDTH | Gdi.DM_PELSHEIGHT;
// Try To Set Selected Mode And Get Results. NOTE: CDS_FULLSCREEN Gets Rid Of Start Bar.
fullscreen = true;
}
form = new QuadricDemo(); // Create The Window
form.Width = width; // Set Window Width
form.Height = height; // Set Window Height
form.Text = title;
#region WINDOW CREATION STUFF
Gdi.PIXELFORMATDESCRIPTOR pfd = new Gdi.PIXELFORMATDESCRIPTOR(); // pfd Tells Windows How We Want Things To Be
pfd.nSize = (short)Marshal.SizeOf(pfd); // Size Of This Pixel Format Descriptor
pfd.nVersion = 1; // Version Number
pfd.dwFlags = Gdi.PFD_DRAW_TO_WINDOW | // Format Must Support Window
Gdi.PFD_SUPPORT_OPENGL | // Format Must Support OpenGl
Gdi.PFD_DOUBLEBUFFER; // Format Must Support Double Buffering
pfd.iPixelType = (byte)Gdi.PFD_TYPE_RGBA; // Request An RGBA Format
pfd.cColorBits = (byte)bits; // Select Our Color Depth
pfd.cRedBits = 0; // Color Bits Ignored
pfd.cRedShift = 0;
pfd.cGreenBits = 0;
pfd.cGreenShift = 0;
pfd.cBlueBits = 0;
pfd.cBlueShift = 0;
pfd.cAlphaBits = 0; // No Alpha Buffer
pfd.cAlphaShift = 0; // Shift Bit Ignored
pfd.cAccumBits = 0; // No Accumulation Buffer
pfd.cAccumRedBits = 0; // Accumulation Bits Ignored
pfd.cAccumGreenBits = 0;
pfd.cAccumBlueBits = 0;
pfd.cAccumAlphaBits = 0;
pfd.cDepthBits = 16; // 16Bit Z-Buffer (Depth Buffer)
pfd.cStencilBits = 0; // No Stencil Buffer
pfd.cAuxBuffers = 0; // No Auxiliary Buffer
pfd.iLayerType = (byte)Gdi.PFD_MAIN_PLANE; // Main Drawing Layer
pfd.bReserved = 0; // Reserved
pfd.dwLayerMask = 0; // Layer Masks Ignored
pfd.dwVisibleMask = 0;
pfd.dwDamageMask = 0;
hDC = User.GetDC(form.Handle); // Attempt To Get A Device Context
if (hDC == IntPtr.Zero)
{ // Did We Get A Device Context?
KillGlWindow(); // Reset The Display
MessageBox.Show("Can't Create A Gl Device Context.", "ERROR",
MessageBoxButtons.OK, MessageBoxIcon.Error);
return false;
}
pixelFormat = Gdi.ChoosePixelFormat(hDC, ref pfd); // Attempt To Find An Appropriate Pixel Format
if (pixelFormat == 0)
{ // Did Windows Find A Matching Pixel Format?
KillGlWindow(); // Reset The Display
MessageBox.Show("Can't Find A Suitable PixelFormat.", "ERROR",
MessageBoxButtons.OK, MessageBoxIcon.Error);
return false;
}
if (!Gdi.SetPixelFormat(hDC, pixelFormat, ref pfd))
{ // Are We Able To Set The Pixel Format?
KillGlWindow(); // Reset The Display
MessageBox.Show("Can't Set The PixelFormat.", "ERROR",
MessageBoxButtons.OK, MessageBoxIcon.Error);
return false;
}
hRC = Wgl.wglCreateContext(hDC); // Attempt To Get The Rendering Context
if (hRC == IntPtr.Zero)
{ // Are We Able To Get A Rendering Context?
KillGlWindow(); // Reset The Display
MessageBox.Show("Can't Create A Gl Rendering Context.", "ERROR",
MessageBoxButtons.OK, MessageBoxIcon.Error);
return false;
}
if (!Wgl.wglMakeCurrent(hDC, hRC))
{ // Try To Activate The Rendering Context
KillGlWindow(); // Reset The Display
MessageBox.Show("Can't Activate The Gl Rendering Context.", "ERROR",
MessageBoxButtons.OK, MessageBoxIcon.Error);
return false;
}
#endregion
form.Show(); // Show The Window
form.Focus(); // Focus The Window
InitGl(); //Initiate OpenGl
setViewport(width, height); // Set viewport
setPerspective(width, height); // Set Up Our Perspective Gl Screen
return true; // Success
}
///<summary>Returns the pixel formats from 1 to Max(maximumCount,maximum available pixel formats).</summary>
public static Gdi.PIXELFORMATDESCRIPTOR[] GetPixelFormats(System.IntPtr hdc) {
Gdi.PIXELFORMATDESCRIPTOR pfd=new Gdi.PIXELFORMATDESCRIPTOR();
pfd.nSize=(short)Marshal.SizeOf(pfd);
pfd.nVersion=1;
int numFormats=_DescribePixelFormat(hdc,1,(uint)pfd.nSize,ref pfd);
Gdi.PIXELFORMATDESCRIPTOR[] pixelFormats=new Gdi.PIXELFORMATDESCRIPTOR[numFormats];
for(int i=0;i<pixelFormats.Length;i++) {
pixelFormats[i]=new Gdi.PIXELFORMATDESCRIPTOR();
pixelFormats[i].nSize=(short)Marshal.SizeOf(pixelFormats[i]);
pixelFormats[i].nVersion=1;
_DescribePixelFormat(hdc,i+1,(uint)pixelFormats[i].nSize,ref pixelFormats[i]);
}
return pixelFormats;
}
/// <summary>
/// Creates the device and rendering contexts using the supplied settings
/// in accumBits, colorBits, depthBits, and stencilBits. Returns the selected
/// pixel format number.
/// </summary>
protected virtual int CreateContexts(IntPtr pDeviceContext,int preferredPixelFormatNum) {
deviceContext = pDeviceContext;
if(deviceContext == IntPtr.Zero) {
throw new Exception("CreateContexts: Unable to create an OpenGL device context");
}
int selectedFormat=0;
Gdi.PIXELFORMATDESCRIPTOR pixelFormat=new Gdi.PIXELFORMATDESCRIPTOR();
pixelFormat.nSize=(short)Marshal.SizeOf(pixelFormat);
pixelFormat.nVersion=1;
//Here we care most about finding a format that will allow the proper creation of the control first and foremost, because even if the format is so bad that output to the display cannot be understood by the user, then the user is able to change the graphical options from within the program. We care second most about finding a format which is quick to load and which will be most time efficient during graphics display. Again, if a wrong choice is made, the user can make a choice of format manually.
try {//Simply try the preferred pixel format number. If it works, then that is all we care about. Remember, 0 is an invalid format number.
if(_DescribePixelFormat(deviceContext,preferredPixelFormatNum,(uint)pixelFormat.nSize,ref pixelFormat)==0 ||
!Gdi.SetPixelFormat(deviceContext,preferredPixelFormatNum,ref pixelFormat)) {
throw new Exception(string.Format("Unable to set the requested pixel format ({0})",selectedFormat));
}
selectedFormat=preferredPixelFormatNum;
}catch{//Could not set the preferred pixel format for some reason. Possibly initial startup or the graphics card or driver changed since the program was last started.
//Now try to auto-select the best pixel-format for speed efficientcy and graphical quality.
try{
PixelFormatValue pfv=ChoosePixelFormatEx(deviceContext);
if(!Gdi.SetPixelFormat(deviceContext,pfv.formatNumber,ref pfv.pfd)) {
throw new Exception("");
}
pixelFormat=pfv.pfd;
selectedFormat=pfv.formatNumber;
}catch{
pixelFormat=new Gdi.PIXELFORMATDESCRIPTOR();//Zero out the old pixel format.
pixelFormat.nSize=(short)Marshal.SizeOf(pixelFormat);
pixelFormat.nVersion=1;
//Unable to select a good pixel format. Now we are desperate. Try all formats starting from 1 until we get some format which at least works. That way the user can change the pixel format from the graphical options from inside the program after this point.
selectedFormat=0;
do{
selectedFormat++;
if(selectedFormat>_DescribePixelFormat(deviceContext,selectedFormat,(uint)pixelFormat.nSize,ref pixelFormat)){
throw new Exception("There are no acceptable pixel formats for OpenGL graphics.");
}
}while(!Gdi.SetPixelFormat(deviceContext,selectedFormat,ref pixelFormat));
}
}
colorBits=pixelFormat.cColorBits;
depthBits=pixelFormat.cDepthBits;
autoSwapBuffers=FormatSupportsDoubleBuffering(pixelFormat);
usehardware=FormatSupportsAcceleration(pixelFormat);
//Create rendering context
renderContext = Wgl.wglCreateContext(deviceContext);
if(renderContext == IntPtr.Zero) {
throw new Exception("CreateContexts: Unable to create an OpenGL rendering context");
}
//Make this the current context
MakeCurrentContext();
return selectedFormat;
}
public override void Create(string name, int width, int height, int colorDepth, bool isFullScreen, int left, int top, bool depthBuffer, params object[] miscParams)
{
// see if a OpenGLContext has been created yet
if(hDC == IntPtr.Zero) {
// grab the current display settings
User.EnumDisplaySettings(null, User.ENUM_CURRENT_SETTINGS, out intialScreenSettings);
if(isFullScreen) {
Gdi.DEVMODE screenSettings = new Gdi.DEVMODE();
screenSettings.dmSize = (short)Marshal.SizeOf(screenSettings);
screenSettings.dmPelsWidth = width; // Selected Screen Width
screenSettings.dmPelsHeight = height; // Selected Screen Height
screenSettings.dmBitsPerPel = colorDepth; // Selected Bits Per Pixel
screenSettings.dmFields = Gdi.DM_BITSPERPEL | Gdi.DM_PELSWIDTH | Gdi.DM_PELSHEIGHT;
// Try To Set Selected Mode And Get Results. NOTE: CDS_FULLSCREEN Gets Rid Of Start Bar.
int result = User.ChangeDisplaySettings(ref screenSettings, User.CDS_FULLSCREEN);
if(result != User.DISP_CHANGE_SUCCESSFUL) {
throw new System.ComponentModel.Win32Exception(Marshal.GetLastWin32Error(), "Unable to change user display settings.");
}
}
// grab the HWND from the supplied target control
hWnd = (IntPtr)((Control)this.Handle).Handle;
Gdi.PIXELFORMATDESCRIPTOR pfd = new Gdi.PIXELFORMATDESCRIPTOR();
pfd.nSize = (short)Marshal.SizeOf(pfd);
pfd.nVersion = 1;
pfd.dwFlags = Gdi.PFD_DRAW_TO_WINDOW |
Gdi.PFD_SUPPORT_OPENGL |
Gdi.PFD_DOUBLEBUFFER;
pfd.iPixelType = (byte) Gdi.PFD_TYPE_RGBA;
pfd.cColorBits = (byte) colorDepth;
pfd.cDepthBits = 32;
// TODO: Find the best setting and use that
pfd.cStencilBits = 8;
pfd.iLayerType = (byte) Gdi.PFD_MAIN_PLANE;
// get the device context
hDC = User.GetDC(hWnd);
if(hDC == IntPtr.Zero) {
throw new Exception("Cannot create a GL device context.");
}
// attempt to find an appropriate pixel format
int pixelFormat = Gdi.ChoosePixelFormat(hDC, ref pfd);
if(pixelFormat == 0) {
throw new System.ComponentModel.Win32Exception(Marshal.GetLastWin32Error(), "Unable to find a suitable pixel format.");
}
if(!Gdi.SetPixelFormat(hDC, pixelFormat, ref pfd)) {
throw new System.ComponentModel.Win32Exception(Marshal.GetLastWin32Error(), "Unable to set the pixel format.");
}
// attempt to get the rendering context
hRC = Wgl.wglCreateContext(hDC);
if(hRC == IntPtr.Zero) {
throw new System.ComponentModel.Win32Exception(Marshal.GetLastWin32Error(), "Unable to create a GL rendering context.");
}
if(!Wgl.wglMakeCurrent(hDC, hRC)) {
throw new System.ComponentModel.Win32Exception(Marshal.GetLastWin32Error(), "Unable to activate the GL rendering context.");
}
// init the GL context
Gl.glShadeModel(Gl.GL_SMOOTH); // Enable Smooth Shading
Gl.glClearColor(0.0f, 0.0f, 0.0f, 0.5f); // Black Background
Gl.glClearDepth(1.0f); // Depth Buffer Setup
Gl.glEnable(Gl.GL_DEPTH_TEST); // Enables Depth Testing
Gl.glDepthFunc(Gl.GL_LEQUAL); // The Type Of Depth Testing To Do
Gl.glHint(Gl.GL_PERSPECTIVE_CORRECTION_HINT, Gl.GL_NICEST); // Really Nice Perspective Calculations
}
// set the params of the window
// TODO: deal with depth buffer
this.Name = name;
this.colorDepth = colorDepth;
this.width = width;
this.height = height;
this.isFullScreen = isFullScreen;
this.top = top;
this.left = left;
// make this window active
this.isActive = true;
}
private void _initializeWgl()
{
// wglGetProcAddress does not work without an active OpenGL context,
// but we need wglChoosePixelFormatARB's address before we can
// create our main window. Thank you very much, Microsoft!
//
// The solution is to create a dummy OpenGL window first, and then
// test for WGL_ARB_pixel_format support. If it is not supported,
// we make sure to never call the ARB pixel format functions.
//
// If is is supported, we call the pixel format functions at least once
// to initialize them (pointers are stored by glprocs.h). We can also
// take this opportunity to enumerate the valid FSAA modes.
SWF.Form frm = new SWF.Form();
IntPtr hwnd = frm.Handle;
// if a simple CreateWindow fails, then boy are we in trouble...
if (hwnd == IntPtr.Zero)
throw new Exception("Window creation failed");
// no chance of failure and no need to release thanks to CS_OWNDC
IntPtr hdc = User.GetDC(hwnd);
// assign a simple OpenGL pixel format that everyone supports
Gdi.PIXELFORMATDESCRIPTOR pfd = new Gdi.PIXELFORMATDESCRIPTOR();
;
pfd.nSize = (short)Marshal.SizeOf(pfd);
pfd.nVersion = 1;
pfd.cColorBits = 16;
pfd.cDepthBits = 15;
pfd.dwFlags = Gdi.PFD_DRAW_TO_WINDOW | Gdi.PFD_SUPPORT_OPENGL | Gdi.PFD_DOUBLEBUFFER;
pfd.iPixelType = Gdi.PFD_TYPE_RGBA;
// if these fail, wglCreateContext will also quietly fail
int format;
format = Gdi.ChoosePixelFormat(hdc, ref pfd);
if (format != 0)
Gdi.SetPixelFormat(hdc, format, ref pfd);
IntPtr hrc = Wgl.wglCreateContext(hdc);
if (hrc != IntPtr.Zero)
{
// if wglMakeCurrent fails, wglGetProcAddress will return null
Wgl.wglMakeCurrent(hdc, hrc);
Wgl.ReloadFunctions(); // Tao 2.0
// check for pixel format and multisampling support
//IntPtr wglGetExtensionsStringARB = Wgl.wglGetProcAddress( "wglGetExtensionsStringARB" );
//if ( wglGetExtensionsStringARB != IntPtr.Zero )
//{
// string exts = Wgl.wglGetExtensionsStringARB( wglGetExtensionsStringARB, hdc );
// _hasPixelFormatARB = exts.Contains( "WGL_ARB_pixel_format" );
// _hasMultisample = exts.Contains( "WGL_ARB_multisample" );
//}
_hasPixelFormatARB = Wgl.IsExtensionSupported("WGL_ARB_pixel_format");
_hasMultisample = Wgl.IsExtensionSupported("WGL_ARB_multisample");
if (_hasPixelFormatARB && _hasMultisample)
{
// enumerate all formats w/ multisampling
int[] iattr = {
Wgl.WGL_DRAW_TO_WINDOW_ARB, 1,
Wgl.WGL_SUPPORT_OPENGL_ARB, 1,
Wgl.WGL_DOUBLE_BUFFER_ARB, 1,
Wgl.WGL_SAMPLE_BUFFERS_ARB, 1,
Wgl.WGL_ACCELERATION_ARB, Wgl.WGL_FULL_ACCELERATION_ARB,
// We are no matter about the colour, depth and stencil buffers here
//WGL_COLOR_BITS_ARB, 24,
//WGL_ALPHA_BITS_ARB, 8,
//WGL_DEPTH_BITS_ARB, 24,
//WGL_STENCIL_BITS_ARB, 8,
//
Wgl.WGL_SAMPLES_ARB, 2,
0
};
int[] formats = new int[256];
int[] count = new int[256]; // Tao 2.0
//int count;
// cheating here. wglChoosePixelFormatARB proc address needed later on
// when a valid GL context does not exist and glew is not initialized yet.
_wglChoosePixelFormatARB = Wgl.wglGetProcAddress("wglChoosePixelFormatARB");
if (Wgl.wglChoosePixelFormatARB(hdc, iattr, null, 256, formats, count)) // Tao 2.0
//if ( Wgl.wglChoosePixelFormatARB( _wglChoosePixelFormatARB, hdc, iattr, null, 256, formats, out count ) != 0 )
{
// determine what multisampling levels are offered
int query = Wgl.WGL_SAMPLES_ARB, samples;
for (int i = 0; i < count[0]; ++i) // Tao 2.0
//for ( int i = 0; i < count[ 0 ]; ++i )
{
IntPtr wglGetPixelFormatAttribivARB = Wgl.wglGetProcAddress("wglGetPixelFormatAttribivARB");
if (Wgl.wglGetPixelFormatAttribivARB(hdc, formats[i], 0, 1, ref query, out samples)) // Tao 2.0
//if ( Wgl.wglGetPixelFormatAttribivARB( wglGetPixelFormatAttribivARB, hdc, formats[ i ], 0, 1, ref query, out samples ) != 0 )
{
if (!_fsaaLevels.Contains(samples))
_fsaaLevels.Add(samples);
}
}
}
}
Wgl.wglMakeCurrent(IntPtr.Zero, IntPtr.Zero);
Wgl.wglDeleteContext(hrc);
}
// clean up our dummy window and class
frm.Dispose();
frm = null;
}
public bool SelectPixelFormat(IntPtr hdc, int colorDepth, int multisample)
{
Gdi.PIXELFORMATDESCRIPTOR pfd = new Gdi.PIXELFORMATDESCRIPTOR();
pfd.nSize = (short)Marshal.SizeOf(pfd);
pfd.nVersion = 1;
pfd.dwFlags = Gdi.PFD_DRAW_TO_WINDOW | Gdi.PFD_SUPPORT_OPENGL | Gdi.PFD_DOUBLEBUFFER;
pfd.iPixelType = (byte)Gdi.PFD_TYPE_RGBA;
pfd.cColorBits = (byte)((colorDepth > 16) ? 24 : colorDepth);
pfd.cAlphaBits = (byte)((colorDepth > 16) ? 8 : 0);
pfd.cDepthBits = 24;
pfd.cStencilBits = 8;
int[] format = new int[1];
if (multisample != 0)
{
// only available with driver support
if (!_hasMultisample || !_hasPixelFormatARB)
return false;
int[] iattr = {
Wgl.WGL_DRAW_TO_WINDOW_ARB, 1,
Wgl.WGL_SUPPORT_OPENGL_ARB, 1,
Wgl.WGL_DOUBLE_BUFFER_ARB, 1,
Wgl.WGL_SAMPLE_BUFFERS_ARB, 1,
Wgl.WGL_ACCELERATION_ARB, Wgl.WGL_FULL_ACCELERATION_ARB,
Wgl.WGL_COLOR_BITS_ARB, pfd.cColorBits,
Wgl.WGL_ALPHA_BITS_ARB, pfd.cAlphaBits,
Wgl.WGL_DEPTH_BITS_ARB, pfd.cDepthBits,
Wgl.WGL_STENCIL_BITS_ARB, pfd.cStencilBits,
Wgl.WGL_SAMPLES_ARB, multisample,
0
};
int[] nformats = new int[1];
//int nformats;
Debug.Assert(_wglChoosePixelFormatARB != null, "failed to get proc address for ChoosePixelFormatARB");
// ChoosePixelFormatARB proc address was obtained when setting up a dummy GL context in initialiseWGL()
// since glew hasn't been initialized yet, we have to cheat and use the previously obtained address
bool result = Wgl.wglChoosePixelFormatARB(hdc, iattr, null, 1, format, nformats); // Tao 2.0
//int result = Wgl.wglChoosePixelFormatARB( _wglChoosePixelFormatARB, hdc, iattr, null, 1, format, out nformats );
if (!result || nformats[0] <= 0) // Tao 2.0
//if ( result == 0 || nformats <= 0 )
return false;
}
else
{
format[0] = Gdi.ChoosePixelFormat(hdc, ref pfd);
}
return (format[0] != 0 && Gdi.SetPixelFormat(hdc, format[0], ref pfd));
}
/// <summary>
/// Creates the OpenGL contexts.
/// </summary>
public void InitializeContexts() {
int pixelFormat; // Holds the selected pixel format
windowHandle = this.Handle; // Get window handle
if(windowHandle == IntPtr.Zero) { // No window handle means something is wrong
MessageBox.Show("Window creation error. No window handle.", "Fatal Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
Environment.Exit(-1);
}
Gdi.PIXELFORMATDESCRIPTOR pfd = new Gdi.PIXELFORMATDESCRIPTOR();// The pixel format descriptor
pfd.nSize = (short) Marshal.SizeOf(pfd); // Size of the pixel format descriptor
pfd.nVersion = 1; // Version number (always 1)
pfd.dwFlags = Gdi.PFD_DRAW_TO_WINDOW | // Format must support windowed mode
Gdi.PFD_SUPPORT_OPENGL | // Format must support OpenGL
Gdi.PFD_DOUBLEBUFFER; // Must support double buffering
pfd.iPixelType = (byte) Gdi.PFD_TYPE_RGBA; // Request an RGBA format
pfd.cColorBits = (byte) colorBits; // Select our color depth
pfd.cRedBits = 0; // Individual color bits ignored
pfd.cRedShift = 0;
pfd.cGreenBits = 0;
pfd.cGreenShift = 0;
pfd.cBlueBits = 0;
pfd.cBlueShift = 0;
pfd.cAlphaBits = 0; // No alpha buffer
pfd.cAlphaShift = 0; // Alpha shift bit ignored
pfd.cAccumBits = accumBits; // Accumulation buffer
pfd.cAccumRedBits = 0; // Individual accumulation bits ignored
pfd.cAccumGreenBits = 0;
pfd.cAccumBlueBits = 0;
pfd.cAccumAlphaBits = 0;
pfd.cDepthBits = depthBits; // Z-buffer (depth buffer)
pfd.cStencilBits = stencilBits; // No stencil buffer
pfd.cAuxBuffers = 0; // No auxiliary buffer
pfd.iLayerType = (byte) Gdi.PFD_MAIN_PLANE; // Main drawing layer
pfd.bReserved = 0; // Reserved
pfd.dwLayerMask = 0; // Layer masks ignored
pfd.dwVisibleMask = 0;
pfd.dwDamageMask = 0;
deviceContext = User.GetDC(windowHandle); // Attempt to get the device context
if(deviceContext == IntPtr.Zero) { // Did we not get a device context?
MessageBox.Show("Can not create a GL device context.", "Fatal Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
Environment.Exit(-1);
}
pixelFormat = Gdi.ChoosePixelFormat(deviceContext, ref pfd); // Attempt to find an appropriate pixel format
if(pixelFormat == 0) { // Did windows not find a matching pixel format?
MessageBox.Show("Can not find a suitable PixelFormat.", "Fatal Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
Environment.Exit(-1);
}
if(!Gdi.SetPixelFormat(deviceContext, pixelFormat, ref pfd)) { // Are we not able to set the pixel format?
MessageBox.Show("Can not set the chosen PixelFormat. Chosen PixelFormat was " + pixelFormat + ".", "Fatal Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
Environment.Exit(-1);
}
renderingContext = Wgl.wglCreateContext(deviceContext); // Attempt to get the rendering context
if(renderingContext == IntPtr.Zero) { // Are we not able to get a rendering context?
MessageBox.Show("Can not create a GL rendering context.", "Fatal Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
Environment.Exit(-1);
}
MakeCurrent(); // Attempt to activate the rendering context
// Force A Reset On The Working Set Size
Kernel.SetProcessWorkingSetSize(Process.GetCurrentProcess().Handle, -1, -1);
}
protected Gdi.PIXELFORMATDESCRIPTOR GetPixelFormat()
{
Gdi.PIXELFORMATDESCRIPTOR lRet = new Gdi.PIXELFORMATDESCRIPTOR();
lRet.nSize = (short)Marshal.SizeOf(lRet);
lRet.nVersion = 1;
lRet.dwFlags = Gdi.PFD_DRAW_TO_WINDOW |
Gdi.PFD_SUPPORT_OPENGL |
Gdi.PFD_DOUBLEBUFFER;
lRet.iPixelType = (byte)Gdi.PFD_TYPE_RGBA;
lRet.cColorBits = 16;
lRet.cRedBits = 0;
lRet.cRedShift = 0;
lRet.cGreenBits = 0;
lRet.cGreenShift = 0;
lRet.cBlueBits = 0;
lRet.cBlueShift = 0;
lRet.cAlphaBits = 0;
lRet.cAlphaShift = 0;
lRet.cAccumBits = 0;
lRet.cAccumRedBits = 0;
lRet.cAccumGreenBits = 0;
lRet.cAccumBlueBits = 0;
lRet.cAccumAlphaBits = 0;
lRet.cDepthBits = 16;
lRet.cStencilBits = 0;
lRet.cAuxBuffers = 0;
lRet.iLayerType = (byte)Gdi.PFD_MAIN_PLANE;
lRet.bReserved = 0;
lRet.dwLayerMask = 0;
lRet.dwVisibleMask = 0;
lRet.dwDamageMask = 0;
return lRet;
}
void AttachGLToWindow(/*FlurryAnimateChildInfo *child*/)
{
Gdi.PIXELFORMATDESCRIPTOR pfd = new Gdi.PIXELFORMATDESCRIPTOR();//HACK
pfd.nSize = (short)System.Runtime.InteropServices.Marshal.SizeOf(pfd);
pfd.nVersion = 1;
pfd.dwFlags = Gdi.PFD_DRAW_TO_WINDOW | Gdi.PFD_SUPPORT_OPENGL;
pfd.iPixelType = Gdi.PFD_TYPE_RGBA;
pfd.iLayerType = Gdi.PFD_MAIN_PLANE;
pfd.cDepthBits = 16;
pfd.cColorBits = 24;
#if !USEFADEHACK
if (Types.iSettingBufferMode != Types.BUFFER.BUFFER_MODE_SINGLE)
pfd.dwFlags |= Gdi.PFD_DOUBLEBUFFER;
#endif
hdc = User.GetDC(this.Handle);
//Win32.GDI.SetBkColor(hdc, 0);
int iPixelFormat = Gdi.ChoosePixelFormat(hdc, ref pfd);
Gdi.SetPixelFormat(hdc, iPixelFormat, ref pfd);
// then use this to create a rendering context
hglrc = Wgl.wglCreateContext(hdc);
Wgl.wglMakeCurrent(hdc, hglrc);
// tell Flurry to use the whole window as viewport
//GetClientRect(child->hWnd, &rc);
flgroup.SetSize(this.Width, this.Height);
// some nice debug output
//_RPT4(_CRT_WARN, " child 0x%08x: hWnd 0x%08x, hdc 0x%08x, hglrc 0x%08x\n",
// child, child->hWnd, child->hdc, child->hglrc);
//_RPT1(_CRT_WARN, " GL vendor: %s\n", glGetString(GL_VENDOR));
//_RPT1(_CRT_WARN, " GL renderer: %s\n", glGetString(GL_RENDERER));
//_RPT1(_CRT_WARN, " GL version: %s\n", glGetString(GL_VERSION));
//_RPT1(_CRT_WARN, " GL extensions: %s\n", glGetString(GL_EXTENSIONS));
//_RPT0(_CRT_WARN, "\n");
}
public bool Setup(Form mainForm, int width, int height, int bits, bool isfullscreen)
{
int pixelFormat;
this.IsFullscreen = isfullscreen;
this.MainForm = mainForm;
GC.Collect();
Kernel.SetProcessWorkingSetSize(Process.GetCurrentProcess().Handle, -1, -1);
Gl.glShadeModel(Gl.GL_SMOOTH);
if (IsFullscreen)
{
Gdi.DEVMODE devMode = new Gdi.DEVMODE();
devMode.dmSize = (short)Marshal.SizeOf(devMode);
devMode.dmPelsWidth = width;
devMode.dmPelsHeight = height;
devMode.dmBitsPerPel = bits;
devMode.dmFields = Gdi.DM_BITSPERPEL | Gdi.DM_PELSWIDTH | Gdi.DM_PELSHEIGHT;
if (User.ChangeDisplaySettings(ref devMode, User.CDS_FULLSCREEN) != User.DISP_CHANGE_SUCCESSFUL)
{
IsFullscreen = false;
}
}
if (IsFullscreen)
{
MainForm.FormBorderStyle = FormBorderStyle.None;
}
else
{
MainForm.FormBorderStyle = FormBorderStyle.Sizable;
}
MainForm.Width = width;
MainForm.Height = height;
Gdi.PIXELFORMATDESCRIPTOR pfd = new Gdi.PIXELFORMATDESCRIPTOR();
pfd.nSize = (short)Marshal.SizeOf(pfd);
pfd.nVersion = 1;
pfd.dwFlags = Gdi.PFD_SUPPORT_OPENGL | Gdi.PFD_DRAW_TO_WINDOW | Gdi.PFD_DOUBLEBUFFER;
pfd.iPixelType = (byte)Gdi.PFD_TYPE_RGBA;
pfd.cColorBits = (byte)bits;
pfd.cAccumAlphaBits = 0;
pfd.cAccumBits = 0;
pfd.cAccumBlueBits = 0;
pfd.cAccumGreenBits = 0;
pfd.cAccumRedBits = 0;
pfd.cAlphaBits = 0;
pfd.cAlphaShift = 0;
pfd.cAuxBuffers = 0;
pfd.cBlueBits = 0;
pfd.cBlueShift = 0;
pfd.cDepthBits = 16; // depth
pfd.cGreenBits = 0;
pfd.cGreenShift = 0;
pfd.cRedBits = 0;
pfd.cRedShift = 0;
pfd.cStencilBits = 0; // stencil
pfd.iLayerType = (byte)Gdi.PFD_MAIN_PLANE;
pfd.bReserved = 0;
pfd.dwDamageMask = 0;
pfd.dwLayerMask = 0;
pfd.dwVisibleMask = 0;
hDC = User.GetDC(MainForm.Handle);
if (hDC == IntPtr.Zero)
{
Deinitialize();
return false;
}
pixelFormat = Gdi.ChoosePixelFormat(hDC, ref pfd);
if (pixelFormat == 0)
{
Deinitialize();
return false;
}
if (!Gdi.SetPixelFormat(hDC, pixelFormat, ref pfd))
{
Deinitialize();
return false;
}
hRC = Wgl.wglCreateContext(hDC); // ako imamo validan hdc onda postavi rendering context
if (hRC == IntPtr.Zero)
{
Deinitialize();
return false;
}
if (!Wgl.wglMakeCurrent(hDC, hRC))
{
Deinitialize();
return false;
}
MainForm.TopMost = true;
MainForm.Focus();
if (IsFullscreen)
{
Cursor.Hide();
}
ResizeScene(width, height);
if (!Initialize())
{
Deinitialize();
return false;
}
return true;
}
private void CreateDevice(int width, int height, int bits)
{
int pixelFormat; // Holds The Results After Searching For A Match
//this.Fullscreen = fullscreenflag;
GC.Collect(); // Request A Collection
// This Forces A Swap
Kernel.SetProcessWorkingSetSize(Process.GetCurrentProcess().Handle, -1, -1);
if(this.m_bFullscreen) // Attempt Fullscreen Mode?
{
Gdi.DEVMODE dmScreenSettings = new Gdi.DEVMODE(); // Device Mode
// Size Of The Devmode Structure
dmScreenSettings.dmSize = (short) Marshal.SizeOf(dmScreenSettings);
dmScreenSettings.dmPelsWidth = width; // Selected Screen Width
dmScreenSettings.dmPelsHeight = height; // Selected Screen Height
dmScreenSettings.dmBitsPerPel = bits; // Selected Bits Per Pixel
dmScreenSettings.dmFields = Gdi.DM_BITSPERPEL | Gdi.DM_PELSWIDTH | Gdi.DM_PELSHEIGHT;
// Try To Set Selected Mode And Get Results. NOTE: CDS_FULLSCREEN Gets Rid Of Start Bar.
if(User.ChangeDisplaySettings(ref dmScreenSettings, User.CDS_FULLSCREEN) != User.DISP_CHANGE_SUCCESSFUL)
{
// The Mode Fails
throw new Exception("Fullscreen not supported");
}
}
Gdi.PIXELFORMATDESCRIPTOR pfd = new Gdi.PIXELFORMATDESCRIPTOR(); // pfd Tells Windows How We Want Things To Be
pfd.nSize = (short) Marshal.SizeOf(pfd); // Size Of This Pixel Format Descriptor
pfd.nVersion = 1; // Version Number
pfd.dwFlags = Gdi.PFD_DRAW_TO_WINDOW | // Format Must Support Window
Gdi.PFD_SUPPORT_OPENGL | // Format Must Support OpenGL
Gdi.PFD_DOUBLEBUFFER; // Format Must Support Double Buffering
pfd.iPixelType = (byte) Gdi.PFD_TYPE_RGBA; // Request An RGBA Format
pfd.cColorBits = (byte) bits; // Select Our Color Depth
pfd.cRedBits = 0; // Color Bits Ignored
pfd.cRedShift = 0;
pfd.cGreenBits = 0;
pfd.cGreenShift = 0;
pfd.cBlueBits = 0;
pfd.cBlueShift = 0;
pfd.cAlphaBits = 0; // No Alpha Buffer
pfd.cAlphaShift = 0; // Shift Bit Ignored
pfd.cAccumBits = 0; // No Accumulation Buffer
pfd.cAccumRedBits = 0; // Accumulation Bits Ignored
pfd.cAccumGreenBits = 0;
pfd.cAccumBlueBits = 0;
pfd.cAccumAlphaBits = 0;
pfd.cDepthBits = 16; // 16Bit Z-Buffer (Depth Buffer)
pfd.cStencilBits = 0; // No Stencil Buffer
pfd.cAuxBuffers = 0; // No Auxiliary Buffer
pfd.iLayerType = (byte) Gdi.PFD_MAIN_PLANE; // Main Drawing Layer
pfd.bReserved = 0; // Reserved
pfd.dwLayerMask = 0; // Layer Masks Ignored
pfd.dwVisibleMask = 0;
pfd.dwDamageMask = 0;
this._hDC = User.GetDC(this.RenderControl.Handle); // Attempt To Get A Device Context
if(this._hDC == IntPtr.Zero)
{
this.KillGLWindow();
throw new Exception("Can't Create A GL Device Context.");
}
pixelFormat = Gdi.ChoosePixelFormat(this._hDC, ref pfd); // Attempt To Find An Appropriate Pixel Format
if(pixelFormat == 0)
{ // Did Windows Find A Matching Pixel Format?
this.KillGLWindow();
throw new Exception("Can't Find A Suitable PixelFormat.");
}
if(!Gdi.SetPixelFormat(this._hDC, pixelFormat, ref pfd)) // Are We Able To Set The Pixel Format?
{
this.KillGLWindow(); // Reset The Display
throw new Exception("Can't Set The PixelFormat.");
}
this._hRC = Wgl.wglCreateContext(this._hDC); // Attempt To Get The Rendering Context
if(this._hRC == IntPtr.Zero)
{
this.KillGLWindow();
throw new Exception("Can't Create A GL Rendering Context.");
}
if(!Wgl.wglMakeCurrent(this._hDC, this._hRC)) // Try To Activate The Rendering Context
{
this.KillGLWindow(); // Reset The Display
throw new Exception("Can't Activate The GL Rendering Context.");
}
//form.Show();
//form.TopMost = true;
//form.Focus();
this.ReSizeGLScene(this.RenderControl.Width, this.RenderControl.Height); // Set Up Our Perspective GL Screen
if(!InitGL())
{ // Initialize Our Newly Created GL Window
this.KillGLWindow(); // Reset The Display
throw new Exception("Initialization Failed.");
}
}
