| 1 | /////////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: src/common/glcmn.cpp |
| 3 | // Purpose: wxGLCanvasBase implementation |
| 4 | // Author: Vadim Zeitlin |
| 5 | // Created: 2007-04-09 |
| 6 | // RCS-ID: $Id$ |
| 7 | // Copyright: (c) 2007 Vadim Zeitlin <vadim@wxwindows.org> |
| 8 | // Licence: wxWindows licence |
| 9 | /////////////////////////////////////////////////////////////////////////////// |
| 10 | |
| 11 | // ============================================================================ |
| 12 | // declarations |
| 13 | // ============================================================================ |
| 14 | |
| 15 | // ---------------------------------------------------------------------------- |
| 16 | // headers |
| 17 | // ---------------------------------------------------------------------------- |
| 18 | |
| 19 | // for compilers that support precompilation, includes "wx.h". |
| 20 | #include "wx/wxprec.h" |
| 21 | |
| 22 | #ifdef __BORLANDC__ |
| 23 | #pragma hdrstop |
| 24 | #endif |
| 25 | |
| 26 | #if wxUSE_GLCANVAS |
| 27 | |
| 28 | #ifndef WX_PRECOMP |
| 29 | #include "wx/log.h" |
| 30 | #endif // WX_PRECOMP |
| 31 | |
| 32 | #include "wx/glcanvas.h" |
| 33 | |
| 34 | // DLL options compatibility check: |
| 35 | #include "wx/build.h" |
| 36 | WX_CHECK_BUILD_OPTIONS("wxGL") |
| 37 | |
| 38 | IMPLEMENT_CLASS(wxGLApp, wxApp) |
| 39 | |
| 40 | // ============================================================================ |
| 41 | // implementation |
| 42 | // ============================================================================ |
| 43 | |
| 44 | wxGLCanvasBase::wxGLCanvasBase() |
| 45 | { |
| 46 | #if WXWIN_COMPATIBILITY_2_8 |
| 47 | m_glContext = NULL; |
| 48 | #endif |
| 49 | |
| 50 | // we always paint background entirely ourselves so prevent wx from erasing |
| 51 | // it to avoid flicker |
| 52 | SetBackgroundStyle(wxBG_STYLE_CUSTOM); |
| 53 | } |
| 54 | |
| 55 | bool wxGLCanvasBase::SetCurrent(const wxGLContext& context) const |
| 56 | { |
| 57 | // although on MSW it works even if the window is still hidden, it doesn't |
| 58 | // work in other ports (notably X11-based ones) and documentation mentions |
| 59 | // that SetCurrent() can only be called for a shown window, so check for it |
| 60 | wxASSERT_MSG( IsShownOnScreen(), wxT("can't make hidden GL canvas current") ); |
| 61 | |
| 62 | return context.SetCurrent(*static_cast<const wxGLCanvas *>(this)); |
| 63 | } |
| 64 | |
| 65 | #ifndef wxHAS_OPENGL_ES |
| 66 | bool wxGLCanvasBase::SetColour(const wxString& colour) |
| 67 | { |
| 68 | wxColour col = wxTheColourDatabase->Find(colour); |
| 69 | if ( !col.Ok() ) |
| 70 | return false; |
| 71 | |
| 72 | GLboolean isRGBA; |
| 73 | glGetBooleanv(GL_RGBA_MODE, &isRGBA); |
| 74 | if ( isRGBA ) |
| 75 | { |
| 76 | glColor3f(col.Red() / 256., col.Green() / 256., col.Blue() / 256.); |
| 77 | } |
| 78 | else // indexed colour |
| 79 | { |
| 80 | GLint pix = GetColourIndex(col); |
| 81 | if ( pix == -1 ) |
| 82 | { |
| 83 | wxLogError(_("Failed to allocate colour for OpenGL")); |
| 84 | return false; |
| 85 | } |
| 86 | |
| 87 | glIndexi(pix); |
| 88 | } |
| 89 | |
| 90 | return true; |
| 91 | } |
| 92 | #endif |
| 93 | |
| 94 | wxGLCanvasBase::~wxGLCanvasBase() |
| 95 | { |
| 96 | #if WXWIN_COMPATIBILITY_2_8 |
| 97 | delete m_glContext; |
| 98 | #endif // WXWIN_COMPATIBILITY_2_8 |
| 99 | } |
| 100 | |
| 101 | #if WXWIN_COMPATIBILITY_2_8 |
| 102 | |
| 103 | wxGLContext *wxGLCanvasBase::GetContext() const |
| 104 | { |
| 105 | return m_glContext; |
| 106 | } |
| 107 | |
| 108 | void wxGLCanvasBase::SetCurrent() |
| 109 | { |
| 110 | if ( m_glContext ) |
| 111 | SetCurrent(*m_glContext); |
| 112 | } |
| 113 | |
| 114 | void wxGLCanvasBase::OnSize(wxSizeEvent& WXUNUSED(event)) |
| 115 | { |
| 116 | } |
| 117 | |
| 118 | #endif // WXWIN_COMPATIBILITY_2_8 |
| 119 | |
| 120 | /* static */ |
| 121 | bool wxGLCanvasBase::IsExtensionInList(const char *list, const char *extension) |
| 122 | { |
| 123 | if ( !list ) |
| 124 | return false; |
| 125 | |
| 126 | for ( const char *p = list; *p; p++ ) |
| 127 | { |
| 128 | // advance up to the next possible match |
| 129 | p = wxStrstr(p, extension); |
| 130 | if ( !p ) |
| 131 | break; |
| 132 | |
| 133 | // check that the extension appears at the beginning/ending of the list |
| 134 | // or is preceded/followed by a space to avoid mistakenly finding |
| 135 | // "glExtension" in a list containing some "glFunkyglExtension" |
| 136 | if ( (p == list || p[-1] == ' ') ) |
| 137 | { |
| 138 | char c = p[strlen(extension)]; |
| 139 | if ( c == '\0' || c == ' ' ) |
| 140 | return true; |
| 141 | } |
| 142 | } |
| 143 | |
| 144 | return false; |
| 145 | } |
| 146 | |
| 147 | #endif // wxUSE_GLCANVAS |
| 148 | |