+/////////////////////////////////////////////////////////////////////////////
+// Name: glcanvas.cpp
+// Purpose: wxGLCanvas, for using OpenGL with wxWindows under MS Windows
+// Author: Julian Smart
+// Modified by:
+// Created: 04/01/98
+// RCS-ID: $Id$
+// Copyright: (c) Julian Smart
+// Licence: wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+#ifdef __GNUG__
+#pragma implementation "glcanvas.h"
+#endif
+
+#include "wx/wxprec.h"
+
+#if defined(__BORLANDC__)
+#pragma hdrstop
+#endif
+
+#include <wx/setup.h>
+
+#if wxUSE_GLCANVAS
+
+#ifndef WX_PRECOMP
+#include <wx/frame.h>
+#endif
+
+#include <wx/msw/private.h>
+
+#include <wx/glcanvas.h>
+
+wxChar wxGLCanvasClassName[] = wxT("wxGLCanvasClass");
+
+LRESULT WXDLLEXPORT APIENTRY _EXPORT wxWndProc(HWND hWnd, UINT message,
+ WPARAM wParam, LPARAM lParam);
+
+/*
+ * GLContext implementation
+ */
+
+wxGLContext::wxGLContext(bool isRGB, wxGLCanvas *win, const wxPalette& palette)
+{
+ m_window = win;
+
+ m_hDC = win->GetHDC();
+
+ m_glContext = wglCreateContext((HDC) m_hDC);
+ wxCHECK_RET( m_glContext, "Couldn't create OpenGl context" );
+
+ wglMakeCurrent((HDC) m_hDC, m_glContext);
+}
+
+wxGLContext::wxGLContext(
+ bool isRGB, wxGLCanvas *win,
+ const wxPalette& palette,
+ const wxGLContext *other /* for sharing display lists */
+)
+{
+ m_window = win;
+
+ m_hDC = win->GetHDC();
+
+ m_glContext = wglCreateContext((HDC) m_hDC);
+ wxCHECK_RET( m_glContext, "Couldn't create OpenGl context" );
+
+ if( other != 0 )
+ wglShareLists( other->m_glContext, m_glContext );
+
+ wglMakeCurrent((HDC) m_hDC, m_glContext);
+}
+
+wxGLContext::~wxGLContext()
+{
+ if (m_glContext)
+ {
+ wglMakeCurrent(NULL, NULL);
+ wglDeleteContext(m_glContext);
+ }
+}
+
+void wxGLContext::SwapBuffers()
+{
+ if (m_glContext)
+ {
+ wglMakeCurrent((HDC) m_hDC, m_glContext);
+ ::SwapBuffers((HDC) m_hDC); //blits the backbuffer into DC
+ }
+}
+
+void wxGLContext::SetCurrent()
+{
+ if (m_glContext)
+ {
+ wglMakeCurrent((HDC) m_hDC, m_glContext);
+ }
+
+/*
+ setupPixelFormat(hDC);
+ setupPalette(hDC);
+*/
+}
+
+void wxGLContext::SetColour(const char *colour)
+{
+ 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);
+ }
+}
+
+
+/*
+ * wxGLCanvas implementation
+ */
+
+IMPLEMENT_CLASS(wxGLCanvas, wxScrolledWindow)
+
+BEGIN_EVENT_TABLE(wxGLCanvas, wxScrolledWindow)
+ EVT_SIZE(wxGLCanvas::OnSize)
+ 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()
+{
+ m_glContext = (wxGLContext*) NULL;
+
+ bool ret = Create(parent, id, pos, size, style, name);
+
+ if ( ret )
+ {
+ SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
+ SetFont(wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT));
+ }
+
+ m_hDC = (WXHDC) ::GetDC((HWND) GetHWND());
+
+ SetupPixelFormat();
+ SetupPalette(palette);
+
+ m_glContext = new wxGLContext(TRUE, this, palette);
+}
+
+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()
+{
+ m_glContext = (wxGLContext*) NULL;
+
+ bool ret = Create(parent, id, pos, size, style, name);
+
+ if ( ret )
+ {
+ SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
+ SetFont(wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT));
+ }
+
+ m_hDC = (WXHDC) ::GetDC((HWND) GetHWND());
+
+ SetupPixelFormat();
+ SetupPalette(palette);
+
+ m_glContext = new wxGLContext(TRUE, this, palette, shared );
+}
+
+// Not very usefull for wxMSW, but this is to be wxGTK compliant
+
+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()
+{
+ m_glContext = (wxGLContext*) NULL;
+
+ bool ret = Create(parent, id, pos, size, style, name);
+
+ if ( ret )
+ {
+ SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_3DFACE));
+ SetFont(wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT));
+ }
+
+ m_hDC = (WXHDC) ::GetDC((HWND) GetHWND());
+
+ SetupPixelFormat();
+ SetupPalette(palette);
+
+ wxGLContext *sharedContext=0;
+ if (shared) sharedContext=shared->GetContext();
+ m_glContext = new wxGLContext(TRUE, this, palette, sharedContext );
+}
+
+wxGLCanvas::~wxGLCanvas()
+{
+ if (m_glContext)
+ delete m_glContext;
+
+ ::ReleaseDC((HWND) GetHWND(), (HDC) m_hDC);
+}
+
+// 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)
+{
+ static bool registeredGLCanvasClass = FALSE;
+
+ // We have to register a special window class because we need
+ // the CS_OWNDC style for GLCanvas.
+
+/*
+ From Angel Popov <jumpo@bitex.com>
+
+ Here are two snips from a dicussion in the OpenGL Gamedev list that explains
+ how this problem can be fixed:
+
+ "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."
+
+ "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."
+*/
+
+ if (!registeredGLCanvasClass)
+ {
+ WNDCLASS wndclass;
+
+ static const long styleNormal = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS | CS_OWNDC;
+
+ // 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 = styleNormal;
+
+ if ( !RegisterClass(&wndclass) )
+ {
+ wxLogLastError("RegisterClass(wxGLCanvasClass)");
+
+ return FALSE;
+ }
+ registeredGLCanvasClass = TRUE;
+ }
+
+ wxCHECK_MSG( parent, FALSE, wxT("can't create wxWindow without parent") );
+
+ if ( !CreateBase(parent, id, pos, size, style, wxDefaultValidator, name) )
+ return FALSE;
+
+ parent->AddChild(this);
+
+ DWORD msflags = 0;
+ if ( style & wxBORDER )
+ msflags |= WS_BORDER;
+ if ( style & wxTHICK_FRAME )
+ msflags |= WS_THICKFRAME;
+
+ msflags |= WS_CHILD | WS_VISIBLE;
+ if ( style & wxCLIP_CHILDREN )
+ msflags |= WS_CLIPCHILDREN;
+
+ bool want3D;
+ WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D);
+
+ // 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))
+ {
+ msflags |= WS_BORDER;
+ }
+
+ // calculate the value to return from WM_GETDLGCODE handler
+ if ( GetWindowStyleFlag() & wxWANTS_CHARS )
+ {
+ // want everything: i.e. all keys and WM_CHAR message
+ m_lDlgCode = DLGC_WANTARROWS | DLGC_WANTCHARS |
+ DLGC_WANTTAB | DLGC_WANTMESSAGE;
+ }
+
+ MSWCreate(m_windowId, parent, wxGLCanvasClassName, this, NULL,
+ pos.x, pos.y,
+ WidthDefault(size.x), HeightDefault(size.y),
+ msflags, NULL, exStyle);
+
+ return TRUE;
+
+}
+
+void wxGLCanvas::SetupPixelFormat() // (HDC hDC)
+{
+ 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;
+
+ pixelFormat = ChoosePixelFormat((HDC) m_hDC, &pfd);
+ if (pixelFormat == 0) {
+ MessageBox(WindowFromDC((HDC) m_hDC), "ChoosePixelFormat failed.", "Error",
+ MB_ICONERROR | MB_OK);
+ exit(1);
+ }
+
+ if (SetPixelFormat((HDC) m_hDC, pixelFormat, &pfd) != TRUE) {
+ MessageBox(WindowFromDC((HDC) m_hDC), "SetPixelFormat failed.", "Error",
+ MB_ICONERROR | MB_OK);
+ exit(1);
+ }
+}
+
+void wxGLCanvas::SetupPalette(const wxPalette& palette)
+{
+ int pixelFormat = GetPixelFormat((HDC) m_hDC);
+ PIXELFORMATDESCRIPTOR pfd;
+
+ DescribePixelFormat((HDC) m_hDC, pixelFormat, sizeof(PIXELFORMATDESCRIPTOR), &pfd);
+
+ if (pfd.dwFlags & PFD_NEED_PALETTE)
+ {
+ }
+ else
+ {
+ return;
+ }
+
+ m_palette = palette;
+
+ if ( !m_palette.Ok() )
+ {
+ m_palette = CreateDefaultPalette();
+ }
+
+ if (m_palette.Ok())
+ {
+ SelectPalette((HDC) m_hDC, (HPALETTE) m_palette.GetHPALETTE(), FALSE);
+ RealizePalette((HDC) m_hDC);
+ }
+}
+
+wxPalette wxGLCanvas::CreateDefaultPalette()
+{
+ PIXELFORMATDESCRIPTOR pfd;
+ int paletteSize;
+ int pixelFormat = GetPixelFormat((HDC) m_hDC);
+
+ DescribePixelFormat((HDC) m_hDC, pixelFormat, sizeof(PIXELFORMATDESCRIPTOR), &pfd);
+
+ paletteSize = 1 << pfd.cColorBits;
+
+ LOGPALETTE* pPal =
+ (LOGPALETTE*) malloc(sizeof(LOGPALETTE) + paletteSize * sizeof(PALETTEENTRY));
+ pPal->palVersion = 0x300;
+ pPal->palNumEntries = 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;
+ int i;
+
+ for (i=0; i<paletteSize; ++i) {
+ pPal->palPalEntry[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;
+ }
+ }
+
+ HPALETTE hPalette = CreatePalette(pPal);
+ free(pPal);
+
+ wxPalette palette;
+ palette.SetHPALETTE((WXHPALETTE) hPalette);
+
+ return palette;
+}
+
+void wxGLCanvas::SwapBuffers()
+{
+ if (m_glContext)
+ m_glContext->SwapBuffers();
+}
+
+void wxGLCanvas::OnSize(wxSizeEvent& 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);
+ }
+}
+
+void wxGLCanvas::SetCurrent()
+{
+ if (m_glContext)
+ {
+ m_glContext->SetCurrent();
+ }
+}
+
+void wxGLCanvas::SetColour(const char *colour)
+{
+ if (m_glContext)
+ m_glContext->SetColour(colour);
+}
+
+// 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();
+ }
+}
+
+/* Give extensions proper function names. */
+
+/* EXT_vertex_array */
+void glArrayElementEXT(GLint i)
+{
+}
+
+void glColorPointerEXT(GLint size, GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer)
+{
+}
+
+void glDrawArraysEXT(GLenum mode, GLint first, GLsizei count)
+{
+#ifdef GL_EXT_vertex_array
+ static PFNGLDRAWARRAYSEXTPROC proc = 0;
+
+ if ( !proc )
+ {
+ proc = (PFNGLDRAWARRAYSEXTPROC) wglGetProcAddress("glDrawArraysEXT");
+ }
+
+ if ( proc )
+ (* proc) (mode, first, count);
+#endif
+}
+
+void glEdgeFlagPointerEXT(GLsizei stride, GLsizei count, const GLboolean *pointer)
+{
+}
+
+void glGetPointervEXT(GLenum pname, GLvoid* *params)
+{
+}
+
+void glIndexPointerEXT(GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer)
+{
+}
+
+void glNormalPointerEXT(GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer)
+{
+#ifdef GL_EXT_vertex_array
+ static PFNGLNORMALPOINTEREXTPROC proc = 0;
+
+ if ( !proc )
+ {
+ proc = (PFNGLNORMALPOINTEREXTPROC) wglGetProcAddress("glNormalPointerEXT");
+ }
+
+ if ( proc )
+ (* proc) (type, stride, count, pointer);
+#endif
+}
+
+void glTexCoordPointerEXT(GLint size, GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer)
+{
+}
+
+void glVertexPointerEXT(GLint size, GLenum type, GLsizei stride, GLsizei count, const GLvoid *pointer)
+{
+#ifdef GL_EXT_vertex_array
+ static PFNGLVERTEXPOINTEREXTPROC proc = 0;
+
+ if ( !proc )
+ {
+ proc = (PFNGLVERTEXPOINTEREXTPROC) wglGetProcAddress("glVertexPointerEXT");
+ }
+
+ 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)
+{
+}
+
+/* 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
projects / wxWidgets.git / commitdiff
