X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/7e42f2f863e7fa64d5c2240324efe3eaf165328e..d53f610c1c224b6a0f58e4009b2bce553b1ff7b9:/src/msw/glcanvas.cpp diff --git a/src/msw/glcanvas.cpp b/src/msw/glcanvas.cpp index f415d6030a..9ef0f75d0c 100644 --- a/src/msw/glcanvas.cpp +++ b/src/msw/glcanvas.cpp @@ -1,417 +1,888 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: glcanvas.cpp -// Purpose: wxGLCanvas, for using OpenGL with wxWindows under MS Windows +// Name: src/msw/glcanvas.cpp +// Purpose: wxGLCanvas, for using OpenGL with wxWidgets under MS Windows // Author: Julian Smart // Modified by: // Created: 04/01/98 // RCS-ID: $Id$ // Copyright: (c) Julian Smart -// Licence: wxWindows licence +// Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// -#ifdef __GNUG__ -#pragma implementation "glcanvas.h" -#endif +// ============================================================================ +// declarations +// ============================================================================ + +// ---------------------------------------------------------------------------- +// headers +// ---------------------------------------------------------------------------- #include "wx/wxprec.h" #if defined(__BORLANDC__) -#pragma hdrstop + #pragma hdrstop #endif -#include - #if wxUSE_GLCANVAS #ifndef WX_PRECOMP -#include + #include "wx/intl.h" + #include "wx/log.h" + #include "wx/app.h" + #include "wx/module.h" #endif -#include -#include -#include - -#include +#include "wx/msw/private.h" -wxChar wxGLCanvasClassName[] = wxT("wxGLCanvasClass"); +#include "wx/glcanvas.h" +// from src/msw/window.cpp LRESULT WXDLLEXPORT APIENTRY _EXPORT wxWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam); +#ifdef GL_EXT_vertex_array + #define WXUNUSED_WITHOUT_GL_EXT_vertex_array(name) name +#else + #define WXUNUSED_WITHOUT_GL_EXT_vertex_array(name) WXUNUSED(name) +#endif + +// ---------------------------------------------------------------------------- +// define possibly missing WGL constants +// ---------------------------------------------------------------------------- + +#ifndef WGL_ARB_pixel_format +#define WGL_DRAW_TO_WINDOW_ARB 0x2001 +#define WGL_ACCELERATION_ARB 0x2003 +#define WGL_NUMBER_OVERLAYS_ARB 0x2008 +#define WGL_NUMBER_UNDERLAYS_ARB 0x2009 +#define WGL_SUPPORT_OPENGL_ARB 0x2010 +#define WGL_DOUBLE_BUFFER_ARB 0x2011 +#define WGL_STEREO_ARB 0x2012 +#define WGL_COLOR_BITS_ARB 0x2014 +#define WGL_RED_BITS_ARB 0x2015 +#define WGL_GREEN_BITS_ARB 0x2017 +#define WGL_BLUE_BITS_ARB 0x2019 +#define WGL_ALPHA_BITS_ARB 0x201B +#define WGL_ACCUM_RED_BITS_ARB 0x201E +#define WGL_ACCUM_GREEN_BITS_ARB 0x201F +#define WGL_ACCUM_BLUE_BITS_ARB 0x2020 +#define WGL_ACCUM_ALPHA_BITS_ARB 0x2021 +#define WGL_DEPTH_BITS_ARB 0x2022 +#define WGL_STENCIL_BITS_ARB 0x2023 +#define WGL_AUX_BUFFERS_ARB 0x2024 +#define WGL_FULL_ACCELERATION_ARB 0x2027 +#endif + +#ifndef WGL_ARB_multisample +#define WGL_SAMPLE_BUFFERS_ARB 0x2041 +#define WGL_SAMPLES_ARB 0x2042 +#endif + +// ---------------------------------------------------------------------------- +// libraries +// ---------------------------------------------------------------------------- + /* - * GLContext implementation - */ + The following two compiler directives are specific to the Microsoft Visual + C++ family of compilers -wxGLContext::wxGLContext(bool isRGB, wxGLCanvas *win, const wxPalette& palette) -{ - m_window = win; + Fundementally what they do is instruct the linker to use these two libraries + for the resolution of symbols. In essence, this is the equivalent of adding + these two libraries to either the Makefile or project file. - m_hDC = win->GetHDC(); + This is NOT a recommended technique, and certainly is unlikely to be used + anywhere else in wxWidgets given it is so specific to not only wxMSW, but + also the VC compiler. However, in the case of opengl support, it's an + applicable technique as opengl is optional in setup.h This code (wrapped by + wxUSE_GLCANVAS), now allows opengl support to be added purely by modifying + setup.h rather than by having to modify either the project or DSP fle. - m_glContext = wglCreateContext((HDC) m_hDC); - wxCHECK_RET( m_glContext, "Couldn't create OpenGl context" ); + See MSDN for further information on the exact usage of these commands. +*/ +#ifdef _MSC_VER +# pragma comment( lib, "opengl32" ) +# pragma comment( lib, "glu32" ) +#endif - wglMakeCurrent((HDC) m_hDC, m_glContext); -} +// ---------------------------------------------------------------------------- +// constants +// ---------------------------------------------------------------------------- + +static const wxChar *wxGLCanvasClassName = wxT("wxGLCanvasClass"); +static const wxChar *wxGLCanvasClassNameNoRedraw = wxT("wxGLCanvasClassNR"); + +// ============================================================================ +// implementation +// ============================================================================ + +// ---------------------------------------------------------------------------- +// wxGLModule is responsible for unregistering wxGLCanvasClass Windows class +// ---------------------------------------------------------------------------- -wxGLContext::wxGLContext( - bool isRGB, wxGLCanvas *win, - const wxPalette& palette, - const wxGLContext *other /* for sharing display lists */ -) +class wxGLModule : public wxModule { - m_window = win; +public: + bool OnInit() { return true; } + void OnExit() { UnregisterClasses(); } - m_hDC = win->GetHDC(); + // register the GL classes if not done yet, return true if ok, false if + // registration failed + static bool RegisterClasses(); - m_glContext = wglCreateContext((HDC) m_hDC); - wxCHECK_RET( m_glContext, "Couldn't create OpenGl context" ); + // unregister the classes, done automatically on program termination + static void UnregisterClasses(); - if( other != 0 ) - wglShareLists( other->m_glContext, m_glContext ); +private: + // wxGLCanvas is only used from the main thread so this is MT-ok + static bool ms_registeredGLClasses; - wglMakeCurrent((HDC) m_hDC, m_glContext); -} + DECLARE_DYNAMIC_CLASS(wxGLModule) +}; -wxGLContext::~wxGLContext() +IMPLEMENT_DYNAMIC_CLASS(wxGLModule, wxModule) + +bool wxGLModule::ms_registeredGLClasses = false; + +/* static */ +bool wxGLModule::RegisterClasses() { - if (m_glContext) - { - wglMakeCurrent(NULL, NULL); - wglDeleteContext(m_glContext); - } + if ( ms_registeredGLClasses ) + return true; + + // We have to register a special window class because we need the CS_OWNDC + // style for GLCanvas: some OpenGL drivers are buggy and don't work with + // windows without this style + WNDCLASS wndclass; + + // the fields which are common to all classes + wndclass.lpfnWndProc = (WNDPROC)wxWndProc; + wndclass.cbClsExtra = 0; + wndclass.cbWndExtra = sizeof( DWORD ); // VZ: what is this DWORD used for? + wndclass.hInstance = wxhInstance; + wndclass.hIcon = (HICON) NULL; + wndclass.hCursor = ::LoadCursor((HINSTANCE)NULL, IDC_ARROW); + wndclass.lpszMenuName = NULL; + + // Register the GLCanvas class name + wndclass.hbrBackground = (HBRUSH)NULL; + wndclass.lpszClassName = wxGLCanvasClassName; + wndclass.style = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS | CS_OWNDC; + + if ( !::RegisterClass(&wndclass) ) + { + wxLogLastError(wxT("RegisterClass(wxGLCanvasClass)")); + return false; + } + + // Register the GLCanvas class name for windows which don't do full repaint + // on resize + wndclass.lpszClassName = wxGLCanvasClassNameNoRedraw; + wndclass.style &= ~(CS_HREDRAW | CS_VREDRAW); + + if ( !::RegisterClass(&wndclass) ) + { + wxLogLastError(wxT("RegisterClass(wxGLCanvasClassNameNoRedraw)")); + + ::UnregisterClass(wxGLCanvasClassName, wxhInstance); + + return false; + } + + ms_registeredGLClasses = true; + + return true; } -void wxGLContext::SwapBuffers() +/* static */ +void wxGLModule::UnregisterClasses() { - if (m_glContext) - { - wglMakeCurrent((HDC) m_hDC, m_glContext); - ::SwapBuffers((HDC) m_hDC); //blits the backbuffer into DC - } + // we need to unregister the classes in case we're in a DLL which is + // unloaded and then loaded again because if we don't, the registration is + // going to fail in wxGLCanvas::Create() the next time we're loaded + if ( ms_registeredGLClasses ) + { + ::UnregisterClass(wxGLCanvasClassName, wxhInstance); + ::UnregisterClass(wxGLCanvasClassNameNoRedraw, wxhInstance); + + ms_registeredGLClasses = false; + } } -void wxGLContext::SetCurrent() +// ---------------------------------------------------------------------------- +// wxGLContext +// ---------------------------------------------------------------------------- + +IMPLEMENT_CLASS(wxGLContext, wxObject) + +wxGLContext::wxGLContext(wxGLCanvas *win, const wxGLContext* other) { - if (m_glContext) - { - wglMakeCurrent((HDC) m_hDC, m_glContext); - } + m_glContext = wglCreateContext(win->GetHDC()); + wxCHECK_RET( m_glContext, wxT("Couldn't create OpenGL context") ); -/* - setupPixelFormat(hDC); - setupPalette(hDC); -*/ + if ( other ) + { + if ( !wglShareLists(other->m_glContext, m_glContext) ) + wxLogLastError(_T("wglShareLists")); + } } -void wxGLContext::SetColour(const char *colour) +wxGLContext::~wxGLContext() { - float r = 0.0; - float g = 0.0; - float b = 0.0; - wxColour *col = wxTheColourDatabase->FindColour(colour); - if (col) - { - r = (float)(col->Red()/256.0); - g = (float)(col->Green()/256.0); - b = (float)(col->Blue()/256.0); - glColor3f( r, g, b); - } + // note that it's ok to delete the context even if it's the current one + wglDeleteContext(m_glContext); } +bool wxGLContext::SetCurrent(const wxGLCanvas& win) const +{ + if ( !wglMakeCurrent(win.GetHDC(), m_glContext) ) + { + wxLogLastError(_T("wglMakeCurrent")); + return false; + } + return true; +} -/* - * wxGLCanvas implementation - */ +// ============================================================================ +// wxGLCanvas +// ============================================================================ -IMPLEMENT_CLASS(wxGLCanvas, wxScrolledWindow) +IMPLEMENT_CLASS(wxGLCanvas, wxWindow) -BEGIN_EVENT_TABLE(wxGLCanvas, wxScrolledWindow) - EVT_SIZE(wxGLCanvas::OnSize) +BEGIN_EVENT_TABLE(wxGLCanvas, wxWindow) EVT_PALETTE_CHANGED(wxGLCanvas::OnPaletteChanged) EVT_QUERY_NEW_PALETTE(wxGLCanvas::OnQueryNewPalette) END_EVENT_TABLE() -wxGLCanvas::wxGLCanvas(wxWindow *parent, wxWindowID id, - const wxPoint& pos, const wxSize& size, long style, const wxString& name, - int *attribList /* not used yet! */, const wxPalette& palette): - wxScrolledWindow() +// ---------------------------------------------------------------------------- +// wxGLCanvas construction +// ---------------------------------------------------------------------------- + +static int ChoosePixelFormatARB(HDC hdc, const int *attribList); + +void wxGLCanvas::Init() +{ +#if WXWIN_COMPATIBILITY_2_8 + m_glContext = NULL; +#endif + m_hDC = NULL; +} + +wxGLCanvas::wxGLCanvas(wxWindow *parent, + wxWindowID id, + const int *attribList, + const wxPoint& pos, + const wxSize& size, + long style, + const wxString& name, + const wxPalette& palette) { - m_glContext = (wxGLContext*) NULL; + Init(); - bool ret = Create(parent, id, pos, size, style, name); + (void)Create(parent, id, pos, size, style, name, attribList, palette); +} + +wxGLCanvas::~wxGLCanvas() +{ + ::ReleaseDC(GetHwnd(), m_hDC); +} + +// Replaces wxWindow::Create functionality, since we need to use a different +// window class +bool wxGLCanvas::CreateWindow(wxWindow *parent, + wxWindowID id, + const wxPoint& pos, + const wxSize& size, + long style, + const wxString& name) +{ + wxCHECK_MSG( parent, false, wxT("can't create wxWindow without parent") ); - if ( ret ) + if ( !wxGLModule::RegisterClasses() ) { - SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE)); - SetFont(wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT)); + wxLogError(_("Failed to register OpenGL window class.")); + + return false; } - m_hDC = (WXHDC) ::GetDC((HWND) GetHWND()); + if ( !CreateBase(parent, id, pos, size, style, wxDefaultValidator, name) ) + return false; + + parent->AddChild(this); - SetupPixelFormat(); - SetupPalette(palette); + /* + A general rule with OpenGL and Win32 is that any window that will have a + HGLRC built for it must have two flags: WS_CLIPCHILDREN & WS_CLIPSIBLINGS. + You can find references about this within the knowledge base and most OpenGL + books that contain the wgl function descriptions. + */ + WXDWORD exStyle = 0; + DWORD msflags = WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS | WS_CLIPCHILDREN; + msflags |= MSWGetStyle(style, &exStyle); - m_glContext = new wxGLContext(TRUE, this, palette); + if ( !MSWCreate(wxGLCanvasClassName, NULL, pos, size, msflags, exStyle) ) + return false; + + m_hDC = ::GetDC(GetHwnd()); + if ( !m_hDC ) + return false; + + return true; } -wxGLCanvas::wxGLCanvas( wxWindow *parent, - const wxGLContext *shared, wxWindowID id, - const wxPoint& pos, const wxSize& size, long style, const wxString& name, - int *attribList, const wxPalette& palette ) - : wxScrolledWindow() +bool wxGLCanvas::Create(wxWindow *parent, + wxWindowID id, + const wxPoint& pos, + const wxSize& size, + long style, + const wxString& name, + const int *attribList, + const wxPalette& palette) { - m_glContext = (wxGLContext*) NULL; + // Create the window first: we will either use it as is or use it to query + // for multisampling support and recreate it later with another pixel format + if ( !CreateWindow(parent, id, pos, size, style, name) ) + return false; - bool ret = Create(parent, id, pos, size, style, name); + PIXELFORMATDESCRIPTOR pfd; + const int setupVal = DoSetup(pfd, attribList); + if ( setupVal == 0 ) // PixelFormat error + return false; - if ( ret ) + if ( setupVal == -1 ) // FSAA requested { - SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE)); - SetFont(wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT)); - } + // now that we have a valid OpenGL window, query it for FSAA support + int pixelFormat; + { + wxGLContext ctx(this); + ctx.SetCurrent(*this); + pixelFormat = ::ChoosePixelFormatARB(m_hDC, attribList); + } - m_hDC = (WXHDC) ::GetDC((HWND) GetHWND()); + if ( pixelFormat > 0 ) + { + // from http://msdn.microsoft.com/en-us/library/ms537559(VS.85).aspx: + // + // Setting the pixel format of a window more than once can + // lead to significant complications for the Window Manager + // and for multithread applications, so it is not allowed. An + // application can only set the pixel format of a window one + // time. Once a window's pixel format is set, it cannot be + // changed. + // + // so we need to delete the old window and create the new one + + // destroy Window + ::ReleaseDC(GetHwnd(), m_hDC); + m_hDC = 0; + + parent->RemoveChild(this); + const HWND hwnd = GetHwnd(); + DissociateHandle(); // will do SetHWND(0); + ::DestroyWindow(hwnd); + + // now recreate with FSAA pixelFormat + if ( !CreateWindow(parent, id, pos, size, style, name) ) + return false; + + if ( !::SetPixelFormat(m_hDC, pixelFormat, &pfd) ) + { + wxLogLastError(_T("SetPixelFormat")); + return false; + } + } + } - SetupPixelFormat(); - SetupPalette(palette); +#if wxUSE_PALETTE + if ( !SetupPalette(palette) ) + return false; +#else // !wxUSE_PALETTE + wxUnusedVar(palette); +#endif // wxUSE_PALETTE/!wxUSE_PALETTE - m_glContext = new wxGLContext(TRUE, this, palette, shared ); + return true; } -// Not very usefull for wxMSW, but this is to be wxGTK compliant +// ---------------------------------------------------------------------------- +// operations +// ---------------------------------------------------------------------------- -wxGLCanvas::wxGLCanvas( wxWindow *parent, const wxGLCanvas *shared, wxWindowID id, - const wxPoint& pos, const wxSize& size, long style, const wxString& name, - int *attribList, const wxPalette& palette ): - wxScrolledWindow() +bool wxGLCanvas::SwapBuffers() { - m_glContext = (wxGLContext*) NULL; - - bool ret = Create(parent, id, pos, size, style, name); - - if ( ret ) + if ( !::SwapBuffers(m_hDC) ) { - SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE)); - SetFont(wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT)); + wxLogLastError(_T("SwapBuffers")); + return false; } - m_hDC = (WXHDC) ::GetDC((HWND) GetHWND()); + return true; +} - SetupPixelFormat(); - SetupPalette(palette); - wxGLContext *sharedContext=0; - if (shared) sharedContext=shared->GetContext(); - m_glContext = new wxGLContext(TRUE, this, palette, sharedContext ); -} +// ---------------------------------------------------------------------------- +// multi sample support +// ---------------------------------------------------------------------------- -wxGLCanvas::~wxGLCanvas() +// this macro defines a variable of type "name_t" called "name" and initializes +// it with the pointer to WGL function "name" (which may be NULL) +#define wxDEFINE_WGL_FUNC(name) \ + name##_t name = (name##_t)wglGetProcAddress(#name) + +/* static */ +bool wxGLCanvasBase::IsExtensionSupported(const char *extension) { - if (m_glContext) - delete m_glContext; + static const char *s_extensionsList = (char *)wxUIntPtr(-1); + if ( s_extensionsList == (char *)wxUIntPtr(-1) ) + { + typedef const char * (WINAPI *wglGetExtensionsStringARB_t)(HDC hdc); - ::ReleaseDC((HWND) GetHWND(), (HDC) m_hDC); + wxDEFINE_WGL_FUNC(wglGetExtensionsStringARB); + if ( wglGetExtensionsStringARB ) + { + s_extensionsList = wglGetExtensionsStringARB(wglGetCurrentDC()); + } + else + { + typedef const char * (WINAPI * wglGetExtensionsStringEXT_t)(); + + wxDEFINE_WGL_FUNC(wglGetExtensionsStringEXT); + if ( wglGetExtensionsStringEXT ) + { + s_extensionsList = wglGetExtensionsStringEXT(); + } + else + { + s_extensionsList = NULL; + } + } + } + + return s_extensionsList && IsExtensionInList(s_extensionsList, extension); } -// Replaces wxWindow::Create functionality, since we need to use a different window class -bool wxGLCanvas::Create(wxWindow *parent, wxWindowID id, - const wxPoint& pos, const wxSize& size, long style, const wxString& name) +// this is a wrapper around wglChoosePixelFormatARB(): returns the pixel format +// index matching the given attributes on success or 0 on failure +static int ChoosePixelFormatARB(HDC hdc, const int *attribList) { - static bool registeredGLCanvasClass = FALSE; + if ( !wxGLCanvas::IsExtensionSupported("WGL_ARB_multisample") ) + return 0; - // We have to register a special window class because we need - // the CS_OWNDC style for GLCanvas. + typedef BOOL (WINAPI * wglChoosePixelFormatARB_t) + (HDC hdc, + const int *piAttribIList, + const FLOAT *pfAttribFList, + UINT nMaxFormats, + int *piFormats, + UINT *nNumFormats + ); -/* - From Angel Popov + wxDEFINE_WGL_FUNC(wglChoosePixelFormatARB); + if ( !wglChoosePixelFormatARB ) + return 0; // should not occur if extension is supported - Here are two snips from a dicussion in the OpenGL Gamedev list that explains - how this problem can be fixed: + int iAttributes[128]; + int dst = 0; // index in iAttributes array - "There are 5 common DCs available in Win95. These are aquired when you call - GetDC or GetDCEx from a window that does _not_ have the OWNDC flag. - OWNDC flagged windows do not get their DC from the common DC pool, the issue - is they require 800 bytes each from the limited 64Kb local heap for GDI." + #define ADD_ATTR(attr, value) \ + iAttributes[dst++] = attr; iAttributes[dst++] = value - "The deal is, if you hold onto one of the 5 shared DC's too long (as GL apps - do), Win95 will actually "steal" it from you. MakeCurrent fails, - apparently, because Windows re-assigns the HDC to a different window. The - only way to prevent this, the only reliable means, is to set CS_OWNDC." -*/ + ADD_ATTR( WGL_DRAW_TO_WINDOW_ARB, GL_TRUE ); + ADD_ATTR( WGL_SUPPORT_OPENGL_ARB, GL_TRUE ); + ADD_ATTR( WGL_ACCELERATION_ARB, WGL_FULL_ACCELERATION_ARB ); - if (!registeredGLCanvasClass) + if ( !attribList ) { - WNDCLASS wndclass; + ADD_ATTR( WGL_COLOR_BITS_ARB, 24 ); + ADD_ATTR( WGL_ALPHA_BITS_ARB, 8 ); + ADD_ATTR( WGL_DEPTH_BITS_ARB, 16 ); + ADD_ATTR( WGL_STENCIL_BITS_ARB, 0 ); + ADD_ATTR( WGL_DOUBLE_BUFFER_ARB, GL_TRUE ); + ADD_ATTR( WGL_SAMPLE_BUFFERS_ARB, GL_TRUE ); + ADD_ATTR( WGL_SAMPLES_ARB, 4 ); + } + else // have custom attributes + { + #define ADD_ATTR_VALUE(attr) ADD_ATTR(attr, attribList[src++]) - static const long styleNormal = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS | CS_OWNDC; + int src = 0; + while ( attribList[src] ) + { + switch ( attribList[src++] ) + { + case WX_GL_RGBA: + ADD_ATTR( WGL_COLOR_BITS_ARB, 24 ); + ADD_ATTR( WGL_ALPHA_BITS_ARB, 8 ); + break; + + case WX_GL_BUFFER_SIZE: + ADD_ATTR_VALUE( WGL_COLOR_BITS_ARB); + break; + + case WX_GL_LEVEL: + if ( attribList[src] > 0 ) + { + ADD_ATTR( WGL_NUMBER_OVERLAYS_ARB, 1 ); + } + else if ( attribList[src] <0 ) + { + ADD_ATTR( WGL_NUMBER_UNDERLAYS_ARB, 1 ); + } + //else: ignore it + + src++; // skip the value in any case + break; + + case WX_GL_DOUBLEBUFFER: + ADD_ATTR( WGL_DOUBLE_BUFFER_ARB, GL_TRUE ); + break; + + case WX_GL_STEREO: + ADD_ATTR( WGL_STEREO_ARB, GL_TRUE ); + break; + + case WX_GL_AUX_BUFFERS: + ADD_ATTR_VALUE( WGL_AUX_BUFFERS_ARB ); + break; + + case WX_GL_MIN_RED: + ADD_ATTR_VALUE( WGL_RED_BITS_ARB ); + break; + + case WX_GL_MIN_GREEN: + ADD_ATTR_VALUE( WGL_GREEN_BITS_ARB ); + break; + + case WX_GL_MIN_BLUE: + ADD_ATTR_VALUE( WGL_BLUE_BITS_ARB ); + break; + + case WX_GL_MIN_ALPHA: + ADD_ATTR_VALUE( WGL_ALPHA_BITS_ARB ); + break; + + case WX_GL_DEPTH_SIZE: + ADD_ATTR_VALUE( WGL_DEPTH_BITS_ARB ); + break; + + case WX_GL_STENCIL_SIZE: + ADD_ATTR_VALUE( WGL_STENCIL_BITS_ARB ); + break; + + case WX_GL_MIN_ACCUM_RED: + ADD_ATTR_VALUE( WGL_ACCUM_RED_BITS_ARB ); + break; + + case WX_GL_MIN_ACCUM_GREEN: + ADD_ATTR_VALUE( WGL_ACCUM_GREEN_BITS_ARB ); + break; + + case WX_GL_MIN_ACCUM_BLUE: + ADD_ATTR_VALUE( WGL_ACCUM_BLUE_BITS_ARB ); + break; + + case WX_GL_MIN_ACCUM_ALPHA: + ADD_ATTR_VALUE( WGL_ACCUM_ALPHA_BITS_ARB ); + break; + + case WX_GL_SAMPLE_BUFFERS: + ADD_ATTR_VALUE( WGL_SAMPLE_BUFFERS_ARB ); + break; + + case WX_GL_SAMPLES: + ADD_ATTR_VALUE( WGL_SAMPLES_ARB ); + break; + } + } - // the fields which are common to all classes - wndclass.lpfnWndProc = (WNDPROC)wxWndProc; - wndclass.cbClsExtra = 0; - wndclass.cbWndExtra = sizeof( DWORD ); // VZ: what is this DWORD used for? - wndclass.hInstance = wxhInstance; - wndclass.hIcon = (HICON) NULL; - wndclass.hCursor = ::LoadCursor((HINSTANCE)NULL, IDC_ARROW); - wndclass.lpszMenuName = NULL; + #undef ADD_ATTR_VALUE + } - // Register the GLCanvas class name - wndclass.hbrBackground = (HBRUSH)NULL; - wndclass.lpszClassName = wxGLCanvasClassName; - wndclass.style = styleNormal; + #undef ADD_ATTR - if ( !RegisterClass(&wndclass) ) - { - wxLogLastError("RegisterClass(wxGLCanvasClass)"); + iAttributes[dst++] = 0; - return FALSE; - } - registeredGLCanvasClass = TRUE; + int pf; + UINT numFormats = 0; + if ( !wglChoosePixelFormatARB(hdc, iAttributes, NULL, 1, &pf, &numFormats) ) + { + wxLogLastError(_T("wglChoosePixelFormatARB")); + return 0; } - wxCHECK_MSG( parent, FALSE, wxT("can't create wxWindow without parent") ); + return pf; +} - if ( !CreateBase(parent, id, pos, size, style, wxDefaultValidator, name) ) - return FALSE; +// ---------------------------------------------------------------------------- +// pixel format stuff +// ---------------------------------------------------------------------------- - parent->AddChild(this); +// returns true if pfd was adjusted accordingly to attributes provided, false +// if there is an error with attributes or -1 if the attributes indicate +// features not supported by ChoosePixelFormat() at all (currently only multi +// sampling) +static int +AdjustPFDForAttributes(PIXELFORMATDESCRIPTOR& pfd, const int *attribList) +{ + if ( !attribList ) + return 1; - DWORD msflags = 0; - if ( style & wxBORDER ) - msflags |= WS_BORDER; - if ( style & wxTHICK_FRAME ) - msflags |= WS_THICKFRAME; + // remove default attributes + pfd.dwFlags &= ~PFD_DOUBLEBUFFER; + pfd.iPixelType = PFD_TYPE_COLORINDEX; - msflags |= WS_CHILD | WS_VISIBLE; - if ( style & wxCLIP_CHILDREN ) - msflags |= WS_CLIPCHILDREN; + bool requestFSAA = false; + for ( int arg = 0; attribList[arg]; ) + { + switch ( attribList[arg++] ) + { + case WX_GL_RGBA: + pfd.iPixelType = PFD_TYPE_RGBA; + break; + + case WX_GL_BUFFER_SIZE: + pfd.cColorBits = attribList[arg++]; + break; + + case WX_GL_LEVEL: + // this member looks like it may be obsolete + if ( attribList[arg] > 0 ) + pfd.iLayerType = PFD_OVERLAY_PLANE; + else if ( attribList[arg] < 0 ) + pfd.iLayerType = (BYTE)PFD_UNDERLAY_PLANE; + else + pfd.iLayerType = PFD_MAIN_PLANE; + arg++; + break; + + case WX_GL_DOUBLEBUFFER: + pfd.dwFlags |= PFD_DOUBLEBUFFER; + break; + + case WX_GL_STEREO: + pfd.dwFlags |= PFD_STEREO; + break; + + case WX_GL_AUX_BUFFERS: + pfd.cAuxBuffers = attribList[arg++]; + break; + + case WX_GL_MIN_RED: + pfd.cColorBits += (pfd.cRedBits = attribList[arg++]); + break; + + case WX_GL_MIN_GREEN: + pfd.cColorBits += (pfd.cGreenBits = attribList[arg++]); + break; + + case WX_GL_MIN_BLUE: + pfd.cColorBits += (pfd.cBlueBits = attribList[arg++]); + break; + + case WX_GL_MIN_ALPHA: + // doesn't count in cColorBits + pfd.cAlphaBits = attribList[arg++]; + break; + + case WX_GL_DEPTH_SIZE: + pfd.cDepthBits = attribList[arg++]; + break; + + case WX_GL_STENCIL_SIZE: + pfd.cStencilBits = attribList[arg++]; + break; + + case WX_GL_MIN_ACCUM_RED: + pfd.cAccumBits += (pfd.cAccumRedBits = attribList[arg++]); + break; + + case WX_GL_MIN_ACCUM_GREEN: + pfd.cAccumBits += (pfd.cAccumGreenBits = attribList[arg++]); + break; + + case WX_GL_MIN_ACCUM_BLUE: + pfd.cAccumBits += (pfd.cAccumBlueBits = attribList[arg++]); + break; + + case WX_GL_MIN_ACCUM_ALPHA: + pfd.cAccumBits += (pfd.cAccumAlphaBits = attribList[arg++]); + break; + + case WX_GL_SAMPLE_BUFFERS: + case WX_GL_SAMPLES: + // There is no support for multisample when using PIXELFORMATDESCRIPTOR + requestFSAA = true; // Remember that multi sample is requested. + arg++; // will call ChoosePixelFormatARB() later + break; + } + } - bool want3D; - WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D); + return requestFSAA ? -1 : 1; +} - // Even with extended styles, need to combine with WS_BORDER - // for them to look right. - if ( want3D || (m_windowStyle & wxSIMPLE_BORDER) || (m_windowStyle & wxRAISED_BORDER ) || - (m_windowStyle & wxSUNKEN_BORDER) || (m_windowStyle & wxDOUBLE_BORDER)) +/* static */ +int +wxGLCanvas::ChooseMatchingPixelFormat(HDC hdc, + const int *attribList, + PIXELFORMATDESCRIPTOR *ppfd) +{ + // default neutral pixel format + PIXELFORMATDESCRIPTOR pfd = { - msflags |= WS_BORDER; - } + sizeof(PIXELFORMATDESCRIPTOR), // size + 1, // version + PFD_SUPPORT_OPENGL | + PFD_DRAW_TO_WINDOW | + PFD_DOUBLEBUFFER, // use double-buffering by default + PFD_TYPE_RGBA, // default pixel type + 0, // preferred color depth (don't care) + 0, 0, 0, 0, 0, 0, // color bits and shift bits (ignored) + 0, 0, // alpha bits and shift (ignored) + 0, // accumulation total bits + 0, 0, 0, 0, // accumulator RGBA bits (not used) + 16, // depth buffer + 0, // no stencil buffer + 0, // no auxiliary buffers + PFD_MAIN_PLANE, // main layer + 0, // reserved + 0, 0, 0, // no layer, visible, damage masks + }; + + if ( !ppfd ) + ppfd = &pfd; + else + *ppfd = pfd; - // calculate the value to return from WM_GETDLGCODE handler - if ( GetWindowStyleFlag() & wxWANTS_CHARS ) + // adjust the PFD using the provided attributes and also check if we can + // use PIXELFORMATDESCRIPTOR at all: if multisampling is requested, we + // can't as it's not supported by ChoosePixelFormat() + switch ( AdjustPFDForAttributes(*ppfd, attribList) ) { - // want everything: i.e. all keys and WM_CHAR message - m_lDlgCode = DLGC_WANTARROWS | DLGC_WANTCHARS | - DLGC_WANTTAB | DLGC_WANTMESSAGE; - } + case 1: + return ::ChoosePixelFormat(hdc, ppfd); - MSWCreate(m_windowId, parent, wxGLCanvasClassName, this, NULL, - pos.x, pos.y, - WidthDefault(size.x), HeightDefault(size.y), - msflags, NULL, exStyle); + default: + wxFAIL_MSG( "unexpected AdjustPFDForAttributes() return value" ); + // fall through - return TRUE; + case 0: + // error in attributes + return 0; + case -1: + // requestFSAA == true, will continue as normal + // in order to query later for a FSAA pixelformat + return -1; + } } -void wxGLCanvas::SetupPixelFormat() // (HDC hDC) +/* static */ +bool wxGLCanvasBase::IsDisplaySupported(const int *attribList) { - PIXELFORMATDESCRIPTOR pfd = { - sizeof(PIXELFORMATDESCRIPTOR), /* size */ - 1, /* version */ - PFD_SUPPORT_OPENGL | - PFD_DRAW_TO_WINDOW | - PFD_DOUBLEBUFFER, /* support double-buffering */ - PFD_TYPE_RGBA, /* color type */ - 16, /* prefered color depth */ - 0, 0, 0, 0, 0, 0, /* color bits (ignored) */ - 0, /* no alpha buffer */ - 0, /* alpha bits (ignored) */ - 0, /* no accumulation buffer */ - 0, 0, 0, 0, /* accum bits (ignored) */ - 16, /* depth buffer */ - 0, /* no stencil buffer */ - 0, /* no auxiliary buffers */ - PFD_MAIN_PLANE, /* main layer */ - 0, /* reserved */ - 0, 0, 0, /* no layer, visible, damage masks */ - }; - int pixelFormat; + // We need a device context to test the pixel format, so get one + // for the root window. + return wxGLCanvas::ChooseMatchingPixelFormat(ScreenHDC(), attribList) > 0; +} - pixelFormat = ChoosePixelFormat((HDC) m_hDC, &pfd); - if (pixelFormat == 0) { - MessageBox(WindowFromDC((HDC) m_hDC), "ChoosePixelFormat failed.", "Error", - MB_ICONERROR | MB_OK); - exit(1); +int wxGLCanvas::DoSetup(PIXELFORMATDESCRIPTOR &pfd, const int *attribList) +{ + int pixelFormat = ChooseMatchingPixelFormat(m_hDC, attribList, &pfd); + + const bool requestFSAA = pixelFormat == -1; + if ( requestFSAA ) + pixelFormat = ::ChoosePixelFormat(m_hDC, &pfd); + + if ( !pixelFormat ) + { + wxLogLastError(_T("ChoosePixelFormat")); + return 0; } - if (SetPixelFormat((HDC) m_hDC, pixelFormat, &pfd) != TRUE) { - MessageBox(WindowFromDC((HDC) m_hDC), "SetPixelFormat failed.", "Error", - MB_ICONERROR | MB_OK); - exit(1); + if ( !::SetPixelFormat(m_hDC, pixelFormat, &pfd) ) + { + wxLogLastError(_T("SetPixelFormat")); + return 0; } + + return requestFSAA ? -1 : 1; } -void wxGLCanvas::SetupPalette(const wxPalette& palette) -{ - int pixelFormat = GetPixelFormat((HDC) m_hDC); - PIXELFORMATDESCRIPTOR pfd; +// ---------------------------------------------------------------------------- +// palette stuff +// ---------------------------------------------------------------------------- - DescribePixelFormat((HDC) m_hDC, pixelFormat, sizeof(PIXELFORMATDESCRIPTOR), &pfd); +#if wxUSE_PALETTE - if (pfd.dwFlags & PFD_NEED_PALETTE) +bool wxGLCanvas::SetupPalette(const wxPalette& palette) +{ + const int pixelFormat = ::GetPixelFormat(m_hDC); + if ( !pixelFormat ) { + wxLogLastError(_T("GetPixelFormat")); + return false; } - else + + PIXELFORMATDESCRIPTOR pfd; + if ( !::DescribePixelFormat(m_hDC, pixelFormat, sizeof(pfd), &pfd) ) { - return; + wxLogLastError(_T("DescribePixelFormat")); + return false; } + if ( !(pfd.dwFlags & PFD_NEED_PALETTE) ) + return true; + m_palette = palette; if ( !m_palette.Ok() ) { m_palette = CreateDefaultPalette(); + if ( !m_palette.Ok() ) + return false; } - if (m_palette.Ok()) + if ( !::SelectPalette(m_hDC, GetHpaletteOf(m_palette), FALSE) ) { - SelectPalette((HDC) m_hDC, (HPALETTE) m_palette.GetHPALETTE(), FALSE); - RealizePalette((HDC) m_hDC); + wxLogLastError(_T("SelectPalette")); + return false; } + + if ( ::RealizePalette(m_hDC) == GDI_ERROR ) + { + wxLogLastError(_T("RealizePalette")); + return false; + } + + return true; } wxPalette wxGLCanvas::CreateDefaultPalette() { PIXELFORMATDESCRIPTOR pfd; int paletteSize; - int pixelFormat = GetPixelFormat((HDC) m_hDC); + int pixelFormat = GetPixelFormat(m_hDC); - DescribePixelFormat((HDC) m_hDC, pixelFormat, sizeof(PIXELFORMATDESCRIPTOR), &pfd); + DescribePixelFormat(m_hDC, pixelFormat, sizeof(PIXELFORMATDESCRIPTOR), &pfd); - paletteSize = 1 << pfd.cColorBits; + paletteSize = 1 << pfd.cColorBits; LOGPALETTE* pPal = (LOGPALETTE*) malloc(sizeof(LOGPALETTE) + paletteSize * sizeof(PALETTEENTRY)); pPal->palVersion = 0x300; - pPal->palNumEntries = paletteSize; + pPal->palNumEntries = (WORD)paletteSize; /* build a simple RGB color palette */ + int redMask = (1 << pfd.cRedBits) - 1; + int greenMask = (1 << pfd.cGreenBits) - 1; + int blueMask = (1 << pfd.cBlueBits) - 1; + + for (int i=0; ipalPalEntry[i].peRed = - (((i >> pfd.cRedShift) & redMask) * 255) / redMask; - pPal->palPalEntry[i].peGreen = - (((i >> pfd.cGreenShift) & greenMask) * 255) / greenMask; - pPal->palPalEntry[i].peBlue = - (((i >> pfd.cBlueShift) & blueMask) * 255) / blueMask; - pPal->palPalEntry[i].peFlags = 0; - } + pPal->palPalEntry[i].peRed = + (BYTE)((((i >> pfd.cRedShift) & redMask) * 255) / redMask); + pPal->palPalEntry[i].peGreen = + (BYTE)((((i >> pfd.cGreenShift) & greenMask) * 255) / greenMask); + pPal->palPalEntry[i].peBlue = + (BYTE)((((i >> pfd.cBlueShift) & blueMask) * 255) / blueMask); + pPal->palPalEntry[i].peFlags = 0; } HPALETTE hPalette = CreatePalette(pPal); @@ -423,204 +894,105 @@ wxPalette wxGLCanvas::CreateDefaultPalette() return palette; } -void wxGLCanvas::SwapBuffers() -{ - if (m_glContext) - m_glContext->SwapBuffers(); -} - -void wxGLCanvas::OnSize(wxSizeEvent& event) +void wxGLCanvas::OnQueryNewPalette(wxQueryNewPaletteEvent& event) { - int width, height; - GetClientSize(& width, & height); - - if (m_glContext) - { - m_glContext->SetCurrent(); - - glViewport(0, 0, (GLint)width, (GLint)height); - glMatrixMode(GL_PROJECTION); - glLoadIdentity(); - glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 15.0 ); - glMatrixMode(GL_MODELVIEW); + /* realize palette if this is the current window */ + if ( GetPalette()->Ok() ) { + ::UnrealizeObject((HPALETTE) GetPalette()->GetHPALETTE()); + ::SelectPalette(GetHDC(), (HPALETTE) GetPalette()->GetHPALETTE(), FALSE); + ::RealizePalette(GetHDC()); + Refresh(); + event.SetPaletteRealized(true); } + else + event.SetPaletteRealized(false); } -void wxGLCanvas::SetCurrent() +void wxGLCanvas::OnPaletteChanged(wxPaletteChangedEvent& event) { - if (m_glContext) + /* realize palette if this is *not* the current window */ + if ( GetPalette() && + GetPalette()->Ok() && (this != event.GetChangedWindow()) ) { - m_glContext->SetCurrent(); + ::UnrealizeObject((HPALETTE) GetPalette()->GetHPALETTE()); + ::SelectPalette(GetHDC(), (HPALETTE) GetPalette()->GetHPALETTE(), FALSE); + ::RealizePalette(GetHDC()); + Refresh(); } } -void wxGLCanvas::SetColour(const char *colour) -{ - if (m_glContext) - m_glContext->SetColour(colour); -} +#endif // wxUSE_PALETTE -// TODO: Have to have this called by parent frame (?) -// So we need wxFrame to call OnQueryNewPalette for all children... -void wxGLCanvas::OnQueryNewPalette(wxQueryNewPaletteEvent& event) -{ - /* realize palette if this is the current window */ - if ( GetPalette()->Ok() ) { - ::UnrealizeObject((HPALETTE) GetPalette()->GetHPALETTE()); - ::SelectPalette((HDC) GetHDC(), (HPALETTE) GetPalette()->GetHPALETTE(), FALSE); - ::RealizePalette((HDC) GetHDC()); - Refresh(); - event.SetPaletteRealized(TRUE); - } - else - event.SetPaletteRealized(FALSE); -} - -// I think this doesn't have to be propagated to child windows. -void wxGLCanvas::OnPaletteChanged(wxPaletteChangedEvent& event) -{ - /* realize palette if this is *not* the current window */ - if ( GetPalette() && - GetPalette()->Ok() && (this != event.GetChangedWindow()) ) - { - ::UnrealizeObject((HPALETTE) GetPalette()->GetHPALETTE()); - ::SelectPalette((HDC) GetHDC(), (HPALETTE) GetPalette()->GetHPALETTE(), FALSE); - ::RealizePalette((HDC) GetHDC()); - Refresh(); - } -} +// ---------------------------------------------------------------------------- +// deprecated wxGLCanvas methods using implicit wxGLContext +// ---------------------------------------------------------------------------- -/* Give extensions proper function names. */ +// deprecated constructors creating an implicit m_glContext +#if WXWIN_COMPATIBILITY_2_8 -/* EXT_vertex_array */ -void glArrayElementEXT(GLint i) +wxGLCanvas::wxGLCanvas(wxWindow *parent, + wxWindowID id, + const wxPoint& pos, + const wxSize& size, + long style, + const wxString& name, + const int *attribList, + const wxPalette& palette) { -} + Init(); -void glColorPointerEXT(GLint size, GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer) -{ + if ( Create(parent, id, pos, size, style, name, attribList, palette) ) + m_glContext = new wxGLContext(this); } -void glDrawArraysEXT(GLenum mode, GLint first, GLsizei count) +wxGLCanvas::wxGLCanvas(wxWindow *parent, + const wxGLContext *shared, + wxWindowID id, + const wxPoint& pos, + const wxSize& size, + long style, + const wxString& name, + const int *attribList, + const wxPalette& palette) { -#ifdef GL_EXT_vertex_array - static PFNGLDRAWARRAYSEXTPROC proc = 0; - - if ( !proc ) - { - proc = (PFNGLDRAWARRAYSEXTPROC) wglGetProcAddress("glDrawArraysEXT"); - } - - if ( proc ) - (* proc) (mode, first, count); -#endif -} + Init(); -void glEdgeFlagPointerEXT(GLsizei stride, GLsizei count, const GLboolean *pointer) -{ + if ( Create(parent, id, pos, size, style, name, attribList, palette) ) + m_glContext = new wxGLContext(this, shared); } -void glGetPointervEXT(GLenum pname, GLvoid* *params) +wxGLCanvas::wxGLCanvas(wxWindow *parent, + const wxGLCanvas *shared, + wxWindowID id, + const wxPoint& pos, + const wxSize& size, + long style, + const wxString& name, + const int *attribList, + const wxPalette& palette) { -} + Init(); -void glIndexPointerEXT(GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer) -{ + if ( Create(parent, id, pos, size, style, name, attribList, palette) ) + m_glContext = new wxGLContext(this, shared ? shared->m_glContext : NULL); } -void glNormalPointerEXT(GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer) -{ -#ifdef GL_EXT_vertex_array - static PFNGLNORMALPOINTEREXTPROC proc = 0; +#endif // WXWIN_COMPATIBILITY_2_8 - if ( !proc ) - { - proc = (PFNGLNORMALPOINTEREXTPROC) wglGetProcAddress("glNormalPointerEXT"); - } - if ( proc ) - (* proc) (type, stride, count, pointer); -#endif -} +// ---------------------------------------------------------------------------- +// wxGLApp +// ---------------------------------------------------------------------------- -void glTexCoordPointerEXT(GLint size, GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer) +bool wxGLApp::InitGLVisual(const int *attribList) { -} - -void glVertexPointerEXT(GLint size, GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer) -{ -#ifdef GL_EXT_vertex_array - static PFNGLVERTEXPOINTEREXTPROC proc = 0; - - if ( !proc ) + if ( !wxGLCanvas::ChooseMatchingPixelFormat(ScreenHDC(), attribList) ) { - proc = (PFNGLVERTEXPOINTEREXTPROC) wglGetProcAddress("glVertexPointerEXT"); + wxLogError(_("Failed to initialize OpenGL")); + return false; } - if ( proc ) - (* proc) (size, type, stride, count, pointer); -#endif -} - -/* EXT_color_subtable */ -void glColorSubtableEXT(GLenum target, GLsizei start, GLsizei count, GLenum format, GLenum type, const GLvoid *table) -{ -} - -/* EXT_color_table */ -void glColorTableEXT(GLenum target, GLenum internalformat, GLsizei width, GLenum format, GLenum type, const GLvoid *table) -{ -} - -void glCopyColorTableEXT(GLenum target, GLenum internalformat, GLint x, GLint y, GLsizei width) -{ -} - -void glGetColorTableEXT(GLenum target, GLenum format, GLenum type, GLvoid *table) -{ -} - -void glGetColorTableParamaterfvEXT(GLenum target, GLenum pname, GLfloat *params) -{ -} - -void glGetColorTavleParameterivEXT(GLenum target, GLenum pname, GLint *params) -{ + return true; } -/* SGI_compiled_vertex_array */ -void glLockArraysSGI(GLint first, GLsizei count) -{ -} - -void glUnlockArraysSGI() -{ -} - - -/* SGI_cull_vertex */ -void glCullParameterdvSGI(GLenum pname, GLdouble* params) -{ -} - -void glCullParameterfvSGI(GLenum pname, GLfloat* params) -{ -} - -/* SGI_index_func */ -void glIndexFuncSGI(GLenum func, GLclampf ref) -{ -} - -/* SGI_index_material */ -void glIndexMaterialSGI(GLenum face, GLenum mode) -{ -} - -/* WIN_swap_hint */ -void glAddSwapHintRectWin(GLint x, GLint y, GLsizei width, GLsizei height) -{ -} - -#endif - // wxUSE_GLCANVAS +#endif // wxUSE_GLCANVAS