build/linux/platform_specific_code/juce_linux_Windowing.cpp

@@ -2795,59 +2795,70 @@ Image* juce_createIconForFile (const File& file)
 //==============================================================================
 #if JUCE_OPENGL
 
-struct OpenGLContextInfo
+
+//==============================================================================
+class WindowedGLContext     : public OpenGLContext
 {
-    Window embeddedWindow;
+public:
-    GLXContext renderContext;
+    WindowedGLContext (Component* const component, 
-};
+                       const OpenGLPixelFormat& pixelFormat_,
-
+                       GLXContext sharedContext)
-void* juce_createOpenGLContext (OpenGLComponent* component, void* sharedContext)
+        : renderContext (0),
-{
+          embeddedWindow (0),
-    XSync (display, False);
+          pixelFormat (pixelFormat_)
-    jassert (component != 0);
-
-    if (component == 0)
-        return 0;
-
-    LinuxComponentPeer* const peer
-        = dynamic_cast <LinuxComponentPeer*> (component->getTopLevelComponent()->getPeer());
-
-    if (peer == 0)
-        return 0;
-
-    GLint attribList[] =
     {
-        GLX_RGBA,
+        jassert (component != 0);
-        GLX_DOUBLEBUFFER,
+        LinuxComponentPeer* const peer = dynamic_cast <LinuxComponentPeer*> (component->getTopLevelComponent()->getPeer());
-        GLX_RED_SIZE, 8,
+        if (peer == 0)
-        GLX_GREEN_SIZE, 8,
+            return;
-        GLX_BLUE_SIZE, 8,
-        GLX_ALPHA_SIZE, 8,
-        GLX_DEPTH_SIZE, 8,
-        None
-    };
 
-    XVisualInfo* const bestVisual = glXChooseVisual (display, DefaultScreen (display), attribList);
+        XSync (display, False);
 
-    if (bestVisual == 0)
+        GLint attribs [64];
-        return 0;
+        int n = 0;
+        attribs[n++] = GLX_RGBA;
+        attribs[n++] = GLX_DOUBLEBUFFER;
+        attribs[n++] = GLX_RED_SIZE;
+        attribs[n++] = pixelFormat.redBits;
+        attribs[n++] = GLX_GREEN_SIZE;
+        attribs[n++] = pixelFormat.greenBits;
+        attribs[n++] = GLX_BLUE_SIZE;
+        attribs[n++] = pixelFormat.blueBits;
+        attribs[n++] = GLX_ALPHA_SIZE;
+        attribs[n++] = pixelFormat.alphaBits;
+        attribs[n++] = GLX_DEPTH_SIZE;
+        attribs[n++] = pixelFormat.depthBufferBits;
+        attribs[n++] = GLX_STENCIL_SIZE;
+        attribs[n++] = pixelFormat.stencilBufferBits;
+        attribs[n++] = GLX_ACCUM_RED_SIZE;
+        attribs[n++] = pixelFormat.accumulationBufferRedBits;
+        attribs[n++] = GLX_ACCUM_GREEN_SIZE;
+        attribs[n++] = pixelFormat.accumulationBufferGreenBits;
+        attribs[n++] = GLX_ACCUM_BLUE_SIZE;
+        attribs[n++] = pixelFormat.accumulationBufferBlueBits;
+        attribs[n++] = GLX_ACCUM_ALPHA_SIZE;
+        attribs[n++] = pixelFormat.accumulationBufferAlphaBits;
 
-    OpenGLContextInfo* const oc = new OpenGLContextInfo();
+        // xxx not sure how to do fullSceneAntiAliasingNumSamples on linux..
 
-    oc->renderContext = glXCreateContext (display, bestVisual,
+        attribs[n++] = None;
-                                          (sharedContext != 0) ? ((OpenGLContextInfo*) sharedContext)->renderContext
-                                                               : 0,
-                                          GL_TRUE);
 
-    Window windowH = (Window) peer->getNativeHandle();
+        XVisualInfo* const bestVisual = glXChooseVisual (display, DefaultScreen (display), attribs);
 
-    Colormap colourMap = XCreateColormap (display, windowH, bestVisual->visual, AllocNone);
+        if (bestVisual == 0)
-    XSetWindowAttributes swa;
+            return;
-    swa.colormap = colourMap;
-    swa.border_pixel = 0;
-    swa.event_mask = ExposureMask | StructureNotifyMask;
 
-    oc->embeddedWindow = XCreateWindow (display, windowH,
+        renderContext = glXCreateContext (display, bestVisual, sharedContext, GL_TRUE);
+
+        Window windowH = (Window) peer->getNativeHandle();
+
+        Colormap colourMap = XCreateColormap (display, windowH, bestVisual->visual, AllocNone);
+        XSetWindowAttributes swa;
+        swa.colormap = colourMap;
+        swa.border_pixel = 0;
+        swa.event_mask = ExposureMask | StructureNotifyMask;
+
+        embeddedWindow = XCreateWindow (display, windowH,
                                         0, 0, 1, 1, 0,
                                         bestVisual->depth,
                                         InputOutput,
@@ -2855,73 +2866,104 @@ void* juce_createOpenGLContext (OpenGLComponent* component, void* sharedContext)
                                         CWBorderPixel | CWColormap | CWEventMask,
                                         &swa);
 
-    XSaveContext (display, (XID) oc->embeddedWindow, improbableNumber, (XPointer) peer);
+        XSaveContext (display, (XID) embeddedWindow, improbableNumber, (XPointer) peer);
 
-    XMapWindow (display, oc->embeddedWindow);
+        XMapWindow (display, embeddedWindow);
-    XFreeColormap (display, colourMap);
+        XFreeColormap (display, colourMap);
 
-    XFree (bestVisual);
+        XFree (bestVisual);
-    XSync (display, False);
+        XSync (display, False);
-
-    return oc;
-}
-
-void juce_updateOpenGLWindowPos (void* context, Component* owner, Component* topComp)
-{
-    jassert (context != 0);
-    OpenGLContextInfo* const oc = (OpenGLContextInfo*) context;
-
-    XMoveResizeWindow (display, oc->embeddedWindow,
-                       owner->getScreenX() - topComp->getScreenX(),
-                       owner->getScreenY() - topComp->getScreenY(),
-                       jmax (1, owner->getWidth()),
-                       jmax (1, owner->getHeight()));
-}
-
-void juce_deleteOpenGLContext (void* context)
-{
-    OpenGLContextInfo* const oc = (OpenGLContextInfo*) context;
-
-    if (oc != 0)
-    {
-        glXDestroyContext (display, oc->renderContext);
-
-        XUnmapWindow (display, oc->embeddedWindow);
-        XDestroyWindow (display, oc->embeddedWindow);
-
-        delete oc;
     }
-}
 
-bool juce_makeOpenGLContextCurrent (void* context)
+    ~WindowedGLContext() 
-{
+    {
-    OpenGLContextInfo* const oc = (OpenGLContextInfo*) context;
+        makeInactive();
 
-    if (oc != 0)
+        glXDestroyContext (display, renderContext);
-        return glXMakeCurrent (display, oc->embeddedWindow, oc->renderContext)
+
+        XUnmapWindow (display, embeddedWindow);
+        XDestroyWindow (display, embeddedWindow);
+    }
+
+    bool makeActive() throw()
+    {
+        jassert (renderContext != 0);
+
+        return glXMakeCurrent (display, embeddedWindow, renderContext)
                 && XSync (display, False);
-    else
+    }
-        return glXMakeCurrent (display, None, 0);
+
+    bool makeInactive() throw()
+    {
+        return (! isActive()) || glXMakeCurrent (display, None, 0);
+    }
+
+    bool isActive() const throw()
+    {
+        return glXGetCurrentContext() == renderContext;
+    }
+
+    const OpenGLPixelFormat getPixelFormat() const
+    {
+        return pixelFormat;
+    }
+
+    void* getRawContext() const throw()
+    {
+        return renderContext;
+    }
+
+    void updateWindowPosition (int x, int y, int w, int h, int)
+    {
+        XMoveResizeWindow (display, embeddedWindow,
+                           x, y, jmax (1, w), jmax (1, h));
+    }
+
+    void swapBuffers()
+    {
+        glXSwapBuffers (display, embeddedWindow);
+    }
+
+    void repaint()
+    {
+    }
+
+    //==============================================================================
+    juce_UseDebuggingNewOperator
+
+    GLXContext renderContext;
+
+private:
+    Window embeddedWindow;
+    OpenGLPixelFormat pixelFormat;
+
+    //==============================================================================
+    WindowedGLContext (const WindowedGLContext&);
+    const WindowedGLContext& operator= (const WindowedGLContext&);
+};
+
+//==============================================================================
+OpenGLContext* OpenGLContext::createContextForWindow (Component* const component, 
+                                                      const OpenGLPixelFormat& pixelFormat,
+                                                      const OpenGLContext* const contextToShareWith)
+{
+    WindowedGLContext* c = new WindowedGLContext (component, pixelFormat,
+                                                  contextToShareWith != 0 ? (GLXContext) contextToShareWith->getRawContext() : 0);
+
+    if (c->renderContext == 0)
+        deleteAndZero (c);
+
+    return c;
 }
 
-bool juce_isActiveOpenGLContext (void* context) throw()
+void juce_glViewport (const int w, const int h)
 {
-    OpenGLContextInfo* const oc = (OpenGLContextInfo*) context;
+    glViewport (0, 0, w, h);
-
-    jassert (oc != 0);
-    return glXGetCurrentContext() == oc->renderContext;
 }
 
-void juce_swapOpenGLBuffers (void* context)
+void OpenGLPixelFormat::getAvailablePixelFormats (OwnedArray <OpenGLPixelFormat>& results)
-{
-    OpenGLContextInfo* const oc = (OpenGLContextInfo*) context;
-
-    if (oc != 0)
-        glXSwapBuffers (display, oc->embeddedWindow);
-}
-
-void juce_repaintOpenGLWindow (void* context)
 {
+    results.add (new OpenGLPixelFormat()); // xxx
 }
 
 #endif

build/macosx/platform_specific_code/juce_mac_Windowing.cpp

@@ -3292,92 +3292,190 @@ void AppleRemoteDevice::handleCallbackInternal()
 //==============================================================================
 #if JUCE_OPENGL
 
-struct OpenGLContextInfo
+//==============================================================================
+class WindowedGLContext     : public OpenGLContext
 {
+public:
+    WindowedGLContext (Component* const component, 
+                       const OpenGLPixelFormat& pixelFormat_,
+                       AGLContext sharedContext)
+        : renderContext (0),
+          pixelFormat (pixelFormat_)
+    {
+        jassert (component != 0);
+
+        HIViewComponentPeer* const peer = dynamic_cast <HIViewComponentPeer*> (component->getTopLevelComponent()->getPeer());
+        if (peer == 0)
+            return;
+
+        GLint attribs [64];
+        int n = 0;
+        attribs[n++] = AGL_RGBA;
+        attribs[n++] = AGL_DOUBLEBUFFER;
+        attribs[n++] = AGL_ACCELERATED;
+        attribs[n++] = AGL_RED_SIZE;
+        attribs[n++] = pixelFormat.redBits;
+        attribs[n++] = AGL_GREEN_SIZE;
+        attribs[n++] = pixelFormat.greenBits;
+        attribs[n++] = AGL_BLUE_SIZE;
+        attribs[n++] = pixelFormat.blueBits;
+        attribs[n++] = AGL_ALPHA_SIZE;
+        attribs[n++] = pixelFormat.alphaBits;
+        attribs[n++] = AGL_DEPTH_SIZE;
+        attribs[n++] = pixelFormat.depthBufferBits;
+        attribs[n++] = AGL_STENCIL_SIZE;
+        attribs[n++] = pixelFormat.stencilBufferBits;
+        attribs[n++] = AGL_ACCUM_RED_SIZE;
+        attribs[n++] = pixelFormat.accumulationBufferRedBits;
+        attribs[n++] = AGL_ACCUM_GREEN_SIZE;
+        attribs[n++] = pixelFormat.accumulationBufferGreenBits;
+        attribs[n++] = AGL_ACCUM_BLUE_SIZE;
+        attribs[n++] = pixelFormat.accumulationBufferBlueBits;
+        attribs[n++] = AGL_ACCUM_ALPHA_SIZE;
+        attribs[n++] = pixelFormat.accumulationBufferAlphaBits;
+
+        // xxx not sure how to do fullSceneAntiAliasingNumSamples..
+
+        attribs[n++] = AGL_SAMPLE_BUFFERS_ARB;
+        attribs[n++] = 1;
+        attribs[n++] = AGL_SAMPLES_ARB;
+        attribs[n++] = 4;
+        attribs[n++] = AGL_CLOSEST_POLICY;
+        attribs[n++] = AGL_NO_RECOVERY;
+        attribs[n++] = AGL_NONE;
+
+        renderContext = aglCreateContext (aglChoosePixelFormat (0, 0, attribs),
+                                          sharedContext);
+
+        aglSetDrawable (renderContext, GetWindowPort (peer->windowRef));
+    }
+
+    ~WindowedGLContext() 
+    {
+        makeInactive();
+        aglSetDrawable (renderContext, 0);
+        aglDestroyContext (renderContext);
+    }
+
+    bool makeActive() throw()
+    {
+        jassert (renderContext != 0);
+
+        return aglSetCurrentContext (renderContext);
+    }
+
+    bool makeInactive() throw()
+    {
+        return (! isActive()) || aglSetCurrentContext (0);
+    }
+
+    bool isActive() const throw()
+    {
+        return aglGetCurrentContext() == renderContext;
+    }
+
+    const OpenGLPixelFormat getPixelFormat() const
+    {
+        return pixelFormat;
+    }
+
+    void* getRawContext() const throw()
+    {
+        return renderContext;
+    }
+
+    void updateWindowPosition (int x, int y, int w, int h, int outerWindowHeight)
+    {
+        GLint bufferRect[4];
+        bufferRect[0] = x;
+        bufferRect[1] = outerWindowHeight - (y + h);
+        bufferRect[2] = w;
+        bufferRect[3] = h;
+
+        aglSetInteger (renderContext, AGL_BUFFER_RECT, bufferRect);
+        aglEnable (renderContext, AGL_BUFFER_RECT);
+    }
+
+    void swapBuffers()
+    {
+        aglSwapBuffers (renderContext);
+    }
+
+    void repaint()
+    {
+    }
+
+    //==============================================================================
+    juce_UseDebuggingNewOperator
+
     AGLContext renderContext;
+
+private:
+    OpenGLPixelFormat pixelFormat;
+
+    //==============================================================================
+    WindowedGLContext (const WindowedGLContext&);
+    const WindowedGLContext& operator= (const WindowedGLContext&);
 };
 
-void* juce_createOpenGLContext (OpenGLComponent* component, void* sharedContext)
+//==============================================================================
+OpenGLContext* OpenGLContext::createContextForWindow (Component* const component, 
+                                                      const OpenGLPixelFormat& pixelFormat,
+                                                      const OpenGLContext* const contextToShareWith)
 {
-    jassert (component != 0);
+    WindowedGLContext* c = new WindowedGLContext (component, pixelFormat,
+                                                  contextToShareWith != 0 ? (AGLContext) contextToShareWith->getRawContext() : 0);
 
-    HIViewComponentPeer* const peer = dynamic_cast <HIViewComponentPeer*> (component->getTopLevelComponent()->getPeer());
+    if (c->renderContext == 0)
+        deleteAndZero (c);
 
-    if (peer == 0)
+    return c;
-        return 0;
-
-    OpenGLContextInfo* const oc = new OpenGLContextInfo();
-
-    GLint attrib[] = {  AGL_RGBA, AGL_DOUBLEBUFFER,
-                        AGL_RED_SIZE, 8,
-                        AGL_ALPHA_SIZE, 8,
-                        AGL_DEPTH_SIZE, 24,
-                        AGL_CLOSEST_POLICY, AGL_NO_RECOVERY,
-                        AGL_SAMPLE_BUFFERS_ARB, 1,
-                        AGL_SAMPLES_ARB, 4,
-                        AGL_NONE };
-
-    oc->renderContext = aglCreateContext (aglChoosePixelFormat (0, 0, attrib),
-                                          (sharedContext != 0) ? ((OpenGLContextInfo*) sharedContext)->renderContext
-                                                               : 0);
-
-    aglSetDrawable (oc->renderContext,
-                    GetWindowPort (peer->windowRef));
-
-    return oc;
 }
 
-void juce_updateOpenGLWindowPos (void* context, Component* owner, Component* topComp)
+void juce_glViewport (const int w, const int h)
 {
-    jassert (context != 0);
+    glViewport (0, 0, w, h);
-    OpenGLContextInfo* const oc = (OpenGLContextInfo*) context;
-
-    GLint bufferRect[4];
-
-    bufferRect[0] = owner->getScreenX() - topComp->getScreenX();
-    bufferRect[1] = topComp->getHeight() - (owner->getHeight() + owner->getScreenY() - topComp->getScreenY());
-    bufferRect[2] = owner->getWidth();
-    bufferRect[3] = owner->getHeight();
-
-    aglSetInteger (oc->renderContext, AGL_BUFFER_RECT, bufferRect);
-    aglEnable (oc->renderContext, AGL_BUFFER_RECT);
 }
 
-void juce_deleteOpenGLContext (void* context)
+static int getAGLAttribute (AGLPixelFormat p, const GLint attrib)
 {
-    OpenGLContextInfo* const oc = (OpenGLContextInfo*) context;
+    GLint result = 0;
-
+    aglDescribePixelFormat (p, attrib, &result);
-    aglDestroyContext (oc->renderContext);
+    return result;
-
-    delete oc;
 }
 
-bool juce_makeOpenGLContextCurrent (void* context)
+void OpenGLPixelFormat::getAvailablePixelFormats (OwnedArray <OpenGLPixelFormat>& results)
 {
-    OpenGLContextInfo* const oc = (OpenGLContextInfo*) context;
+    GLint attribs [64];
+    int n = 0;
+    attribs[n++] = AGL_RGBA;
+    attribs[n++] = AGL_DOUBLEBUFFER;
+    attribs[n++] = AGL_ACCELERATED;
+    attribs[n++] = AGL_NO_RECOVERY;
+    attribs[n++] = AGL_NONE;
 
-    return aglSetCurrentContext ((oc != 0) ? oc->renderContext : 0);
+    AGLPixelFormat p = aglChoosePixelFormat (0, 0, attribs);
+
+    while (p != 0)
+    {
+        OpenGLPixelFormat* const pf = new OpenGLPixelFormat();
+        pf->redBits = getAGLAttribute (p, AGL_RED_SIZE);
+        pf->greenBits = getAGLAttribute (p, AGL_GREEN_SIZE);
+        pf->blueBits = getAGLAttribute (p, AGL_BLUE_SIZE);
+        pf->alphaBits = getAGLAttribute (p, AGL_ALPHA_SIZE);
+        pf->depthBufferBits = getAGLAttribute (p, AGL_DEPTH_SIZE);
+        pf->stencilBufferBits = getAGLAttribute (p, AGL_STENCIL_SIZE);
+        pf->accumulationBufferRedBits = getAGLAttribute (p, AGL_ACCUM_RED_SIZE);
+        pf->accumulationBufferGreenBits = getAGLAttribute (p, AGL_ACCUM_GREEN_SIZE);
+        pf->accumulationBufferBlueBits = getAGLAttribute (p, AGL_ACCUM_BLUE_SIZE);
+        pf->accumulationBufferAlphaBits = getAGLAttribute (p, AGL_ACCUM_ALPHA_SIZE);
+
+        results.add (pf);
+
+        p = aglNextPixelFormat (p);
+    }
 }
 
-bool juce_isActiveOpenGLContext (void* context) throw()
-{
-    OpenGLContextInfo* const oc = (OpenGLContextInfo*) context;
-
-    jassert (oc != 0);
-    return aglGetCurrentContext() == oc->renderContext;
-}
-
-void juce_swapOpenGLBuffers (void* context)
-{
-    OpenGLContextInfo* const oc = (OpenGLContextInfo*) context;
-
-    if (oc != 0)
-        aglSwapBuffers (oc->renderContext);
-}
-
-void juce_repaintOpenGLWindow (void* context)
-{
-}
 
 #endif
 

build/win32/platform_specific_code/juce_win32_Windowing.cpp

@@ -2640,6 +2640,7 @@ void MouseCursor::showInAllWindows() const throw()
     showInWindow (0);
 }
 
+//==============================================================================
 //==============================================================================
 class JuceDropSource   : public IDropSource
 {
@@ -2970,13 +2971,13 @@ static HDROP createHDrop (const StringArray& fileNames) throw()
     return hDrop;
 }
 
-static bool performDragDrop (FORMATETC* format, STGMEDIUM* medium, const DWORD whatToDo) throw()
+static bool performDragDrop (FORMATETC* const format, STGMEDIUM* const medium, const DWORD whatToDo) throw()
 {
     JuceDropSource* const source = new JuceDropSource();
     JuceDataObject* const data = new JuceDataObject (source, format, medium, 1);
 
     DWORD effect;
-    HRESULT res = DoDragDrop (data, source, whatToDo, &effect);
+    const HRESULT res = DoDragDrop (data, source, whatToDo, &effect);
 
     data->Release();
     source->Release();
@@ -3026,152 +3027,456 @@ bool DragAndDropContainer::performExternalDragDropOfText (const String& text)
 }
 
 
+//==============================================================================
 //==============================================================================
 #if JUCE_OPENGL
 
-struct OpenGLContextInfo
+#define WGL_EXT_FUNCTION_INIT(extType, extFunc) \
+    ((extFunc = (extType) wglGetProcAddress (#extFunc)) != 0)
+
+typedef const char* (WINAPI* PFNWGLGETEXTENSIONSSTRINGARBPROC) (HDC hdc);
+typedef BOOL (WINAPI * PFNWGLGETPIXELFORMATATTRIBIVARBPROC) (HDC hdc, int iPixelFormat, int iLayerPlane, UINT nAttributes, const int *piAttributes, int *piValues);
+typedef BOOL (WINAPI * PFNWGLCHOOSEPIXELFORMATARBPROC) (HDC hdc, const int* piAttribIList, const FLOAT *pfAttribFList, UINT nMaxFormats, int *piFormats, UINT *nNumFormats);
+
+#define WGL_NUMBER_PIXEL_FORMATS_ARB    0x2000
+#define WGL_DRAW_TO_WINDOW_ARB          0x2001
+#define WGL_ACCELERATION_ARB            0x2003
+#define WGL_SWAP_METHOD_ARB			    0x2007
+#define WGL_SUPPORT_OPENGL_ARB          0x2010
+#define WGL_PIXEL_TYPE_ARB			    0x2013
+#define WGL_DOUBLE_BUFFER_ARB           0x2011
+#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_DEPTH_BITS_ARB              0x2022
+#define WGL_STENCIL_BITS_ARB            0x2023
+#define WGL_FULL_ACCELERATION_ARB       0x2027
+#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_STEREO_ARB                  0x2012
+#define WGL_SAMPLE_BUFFERS_ARB          0x2041
+#define WGL_SAMPLES_ARB                 0x2042
+#define WGL_TYPE_RGBA_ARB               0x202B
+
+static void getWglExtensions (HDC dc, StringArray& result) throw()
 {
-    Win32ComponentPeer* nativeWindow;
+    PFNWGLGETEXTENSIONSSTRINGARBPROC wglGetExtensionsStringARB = 0;
 
-    HDC dc;
+    if (WGL_EXT_FUNCTION_INIT (PFNWGLGETEXTENSIONSSTRINGARBPROC, wglGetExtensionsStringARB))
-    HGLRC renderContext;
+        result.addTokens (String (wglGetExtensionsStringARB (dc)), false);
-};
+    else
+        jassertfalse // If this fails, it may be because you didn't activate the openGL context
+}
 
-void* juce_createOpenGLContext (OpenGLComponent* component, void* sharedContext)
+
+//==============================================================================
+class WindowedGLContext     : public OpenGLContext
 {
-    jassert (component != 0);
+public:
-
+    WindowedGLContext (Component* const component, HGLRC contextToShareWith)
-    Win32ComponentPeer* const peer = dynamic_cast <Win32ComponentPeer*> (component->getTopLevelComponent()->getPeer());
+        : renderContext (0),
-
+          nativeWindow (0)
-    if (peer == 0)
-        return 0;
-
-    OpenGLContextInfo* const oc = new OpenGLContextInfo();
-
-    oc->nativeWindow = new Win32ComponentPeer (component, 0);
-    oc->nativeWindow->dontRepaint = true;
-    oc->nativeWindow->setVisible (true);
-    HWND hwnd = (HWND) oc->nativeWindow->getNativeHandle();
-
-    SetParent (hwnd, (HWND) peer->getNativeHandle());
-    juce_setWindowStyleBit (hwnd, GWL_STYLE, WS_CHILD, true);
-    juce_setWindowStyleBit (hwnd, GWL_STYLE, WS_POPUP, false);
-
-    oc->dc = GetDC (hwnd);
-
-    PIXELFORMATDESCRIPTOR pfd;
-    zerostruct (pfd);
-    pfd.nSize = sizeof (pfd);
-    pfd.nVersion = 1;
-    pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
-    pfd.iPixelType = PFD_TYPE_RGBA;
-    pfd.cColorBits = 32;
-    pfd.cDepthBits = 32;
-    pfd.iLayerType = PFD_MAIN_PLANE;
-
-    int format = ChoosePixelFormat (oc->dc, &pfd);
-
-    if (format == 0 || ! SetPixelFormat (oc->dc, format, &pfd))
     {
-        // try some less ambitious formats if it fails..
+        jassert (component != 0);
-        pfd.cColorBits = 24;
+        Win32ComponentPeer* const peer = dynamic_cast <Win32ComponentPeer*> (component->getTopLevelComponent()->getPeer());
-        format = ChoosePixelFormat (oc->dc, &pfd);
 
-        if (format == 0 || ! SetPixelFormat (oc->dc, format, &pfd))
+        nativeWindow = new Win32ComponentPeer (component, 0);
+        nativeWindow->dontRepaint = true;
+        nativeWindow->setVisible (true);
+
+        HWND hwnd = (HWND) nativeWindow->getNativeHandle();
+
+        if (peer != 0)
         {
-            pfd.cDepthBits = 16;
+            SetParent (hwnd, (HWND) peer->getNativeHandle());
-            format = ChoosePixelFormat (oc->dc, &pfd);
+            juce_setWindowStyleBit (hwnd, GWL_STYLE, WS_CHILD, true);
+            juce_setWindowStyleBit (hwnd, GWL_STYLE, WS_POPUP, false);
+        }
 
-            if (format == 0 || ! SetPixelFormat (oc->dc, format, &pfd))
+        dc = GetDC (hwnd);
+
+        // Use a default pixel format that should be supported everywhere
+        PIXELFORMATDESCRIPTOR pfd;
+        zerostruct (pfd);
+        pfd.nSize = sizeof (pfd);
+        pfd.nVersion = 1;
+        pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
+        pfd.iPixelType = PFD_TYPE_RGBA;
+        pfd.cColorBits = 16;
+        pfd.cDepthBits = 16;
+
+        const int format = ChoosePixelFormat (dc, &pfd);
+
+        if (format != 0)
+            SetPixelFormat (dc, format, &pfd);
+
+        renderContext = wglCreateContext (dc);
+
+        if (contextToShareWith != 0 && renderContext != 0)
+            wglShareLists (renderContext, contextToShareWith);
+    }
+
+    ~WindowedGLContext() 
+    {
+        makeInactive();
+
+        wglDeleteContext (renderContext);
+        ReleaseDC ((HWND) nativeWindow->getNativeHandle(), dc);
+
+        delete nativeWindow;
+    }
+
+    bool makeActive() throw()
+    {
+        jassert (renderContext != 0);
+        return wglMakeCurrent (dc, renderContext) != 0;
+    }
+
+    bool makeInactive() throw()
+    {
+        return (! isActive()) || (wglMakeCurrent (0, 0) != 0);
+    }
+
+    bool isActive() const throw()
+    {
+        return wglGetCurrentContext() == renderContext;
+    }
+
+    const OpenGLPixelFormat getPixelFormat() const
+    {
+        OpenGLPixelFormat pf;
+
+        StringArray availableExtensions;
+        getWglExtensions (dc, availableExtensions);
+
+        fillInPixelFormatDetails (GetPixelFormat (dc), pf, availableExtensions);
+        return pf;
+    }
+
+    void* getRawContext() const throw()
+    {
+        return renderContext;
+    }
+
+    bool setPixelFormat (const OpenGLPixelFormat& pixelFormat)
+    {
+        jassert (renderContext != 0);
+
+        makeActive();
+
+        StringArray availableExtensions;
+        getWglExtensions (dc, availableExtensions);
+
+        PIXELFORMATDESCRIPTOR pfd;
+        zerostruct (pfd);
+        pfd.nSize = sizeof (pfd);
+        pfd.nVersion = 1;
+        pfd.dwFlags = PFD_SUPPORT_OPENGL | PFD_DRAW_TO_WINDOW | PFD_DOUBLEBUFFER;
+        pfd.iPixelType = PFD_TYPE_RGBA;
+        pfd.iLayerType = PFD_MAIN_PLANE;
+        pfd.cColorBits = pixelFormat.redBits + pixelFormat.greenBits + pixelFormat.blueBits;
+        pfd.cRedBits = pixelFormat.redBits;
+        pfd.cGreenBits = pixelFormat.greenBits;
+        pfd.cBlueBits = pixelFormat.blueBits;
+        pfd.cAlphaBits = pixelFormat.alphaBits;
+        pfd.cDepthBits = pixelFormat.depthBufferBits;
+        pfd.cStencilBits = pixelFormat.stencilBufferBits;
+        pfd.cAccumBits = pixelFormat.accumulationBufferRedBits + pixelFormat.accumulationBufferGreenBits
+                            + pixelFormat.accumulationBufferBlueBits + pixelFormat.accumulationBufferAlphaBits;
+        pfd.cAccumRedBits = pixelFormat.accumulationBufferRedBits;
+        pfd.cAccumGreenBits = pixelFormat.accumulationBufferGreenBits;
+        pfd.cAccumBlueBits = pixelFormat.accumulationBufferBlueBits;
+        pfd.cAccumAlphaBits  = pixelFormat.accumulationBufferAlphaBits;
+
+        int format = 0;
+
+        PFNWGLCHOOSEPIXELFORMATARBPROC wglChoosePixelFormatARB = 0;
+
+        if (availableExtensions.contains ("WGL_ARB_pixel_format") 
+             && WGL_EXT_FUNCTION_INIT (PFNWGLCHOOSEPIXELFORMATARBPROC, wglChoosePixelFormatARB))
+        {
+            int attributes[64];
+            int n = 0;
+
+            attributes[n++] = WGL_DRAW_TO_WINDOW_ARB;
+            attributes[n++] = GL_TRUE;
+            attributes[n++] = WGL_SUPPORT_OPENGL_ARB;
+            attributes[n++] = GL_TRUE;
+            attributes[n++] = WGL_ACCELERATION_ARB;
+            attributes[n++] = WGL_FULL_ACCELERATION_ARB;
+            attributes[n++] = WGL_DOUBLE_BUFFER_ARB;
+            attributes[n++] = GL_TRUE;
+            attributes[n++] = WGL_PIXEL_TYPE_ARB;
+            attributes[n++] = WGL_TYPE_RGBA_ARB;
+
+            attributes[n++] = WGL_COLOR_BITS_ARB;
+            attributes[n++] = pfd.cColorBits;
+            attributes[n++] = WGL_RED_BITS_ARB;
+            attributes[n++] = pixelFormat.redBits;
+            attributes[n++] = WGL_GREEN_BITS_ARB;
+            attributes[n++] = pixelFormat.greenBits;
+            attributes[n++] = WGL_BLUE_BITS_ARB;
+            attributes[n++] = pixelFormat.blueBits;
+            attributes[n++] = WGL_ALPHA_BITS_ARB;
+            attributes[n++] = pixelFormat.alphaBits;
+            attributes[n++] = WGL_DEPTH_BITS_ARB;
+            attributes[n++] = pixelFormat.depthBufferBits;
+
+            if (pixelFormat.stencilBufferBits > 0)
             {
-                pfd.cColorBits = 32;
+                attributes[n++] = WGL_STENCIL_BITS_ARB;
-                format = ChoosePixelFormat (oc->dc, &pfd);
+                attributes[n++] = pixelFormat.stencilBufferBits;
+            }
 
-                if (format == 0 || ! SetPixelFormat (oc->dc, format, &pfd))
+            attributes[n++] = WGL_ACCUM_RED_BITS_ARB;
-                {
+            attributes[n++] = pixelFormat.accumulationBufferRedBits;
-                    jassertfalse // can't find a suitable pixel format that works for opengl
+            attributes[n++] = WGL_ACCUM_GREEN_BITS_ARB;
-                }
+            attributes[n++] = pixelFormat.accumulationBufferGreenBits;
+            attributes[n++] = WGL_ACCUM_BLUE_BITS_ARB;
+            attributes[n++] = pixelFormat.accumulationBufferBlueBits;
+            attributes[n++] = WGL_ACCUM_ALPHA_BITS_ARB;
+            attributes[n++] = pixelFormat.accumulationBufferAlphaBits;
+
+            if (availableExtensions.contains ("WGL_ARB_multisample")
+                 && pixelFormat.fullSceneAntiAliasingNumSamples > 0)
+            {
+                attributes[n++] = WGL_SAMPLE_BUFFERS_ARB;
+                attributes[n++] = 1;
+                attributes[n++] = WGL_SAMPLES_ARB;
+                attributes[n++] = pixelFormat.fullSceneAntiAliasingNumSamples;
+            }
+
+            attributes[n++] = 0;
+
+            UINT formatsCount;
+            const BOOL ok = wglChoosePixelFormatARB (dc, attributes, 0, 1, &format, &formatsCount);
+            (void) ok;
+            jassert (ok);
+        }
+        else
+        {
+            format = ChoosePixelFormat (dc, &pfd);
+        }
+
+        if (format != 0)
+        {
+            makeInactive();
+
+            // Create the real context..
+            if (SetPixelFormat (dc, format, &pfd))
+            {
+                wglDeleteContext (renderContext);
+                renderContext = wglCreateContext (dc);
+
+                jassert (renderContext != 0);
+                return renderContext != 0;
+            }
+        }
+
+        return false;
+    }
+
+    void updateWindowPosition (int x, int y, int w, int h, int)
+    {
+        SetWindowPos ((HWND) nativeWindow->getNativeHandle(), 0,
+                      x, y, w, h,
+                      SWP_NOACTIVATE | SWP_NOZORDER | SWP_NOOWNERZORDER | SWP_NOSENDCHANGING);
+    }
+
+    void repaint()
+    {
+        int x, y, w, h;
+        nativeWindow->getBounds (x, y, w, h);
+        nativeWindow->repaint (0, 0, w, h);
+    }
+
+    void swapBuffers()
+    {
+        SwapBuffers (dc);
+    }
+
+    void findAlternativeOpenGLPixelFormats (OwnedArray <OpenGLPixelFormat>& results)
+    {
+        jassert (isActive());
+        
+        StringArray availableExtensions;
+        getWglExtensions (dc, availableExtensions);
+
+        PFNWGLGETPIXELFORMATATTRIBIVARBPROC wglGetPixelFormatAttribivARB = 0;
+        int numTypes = 0;
+
+        if (availableExtensions.contains("WGL_ARB_pixel_format") 
+             && WGL_EXT_FUNCTION_INIT (PFNWGLGETPIXELFORMATATTRIBIVARBPROC, wglGetPixelFormatAttribivARB))
+        {
+            int attributes = WGL_NUMBER_PIXEL_FORMATS_ARB;
+
+            if (! wglGetPixelFormatAttribivARB (dc, 1, 0, 1, &attributes, &numTypes))
+                jassertfalse
+        }
+        else
+        {
+            numTypes = DescribePixelFormat (dc, 0, 0, 0);
+        }
+
+        OpenGLPixelFormat pf;
+
+        for (int i = 0; i < numTypes; ++i)
+        {
+            if (fillInPixelFormatDetails (i + 1, pf, availableExtensions))
+            {
+                bool alreadyListed = false;
+                for (int j = results.size(); --j >= 0;)
+                    if (pf == *results.getUnchecked(j))
+                        alreadyListed = true;
+
+                if (! alreadyListed)
+                    results.add (new OpenGLPixelFormat (pf));
             }
         }
     }
 
-    oc->renderContext = wglCreateContext (oc->dc);
+    //==============================================================================
+    juce_UseDebuggingNewOperator
 
-    if (sharedContext != 0)
+    HGLRC renderContext;
-        wglShareLists (((OpenGLContextInfo*) sharedContext)->renderContext, oc->renderContext);
 
-    return oc;
+private:
-}
+    Win32ComponentPeer* nativeWindow;
+    HDC dc;
 
-void juce_updateOpenGLWindowPos (void* context, Component* owner, Component* topComp)
+    //==============================================================================
-{
+    bool fillInPixelFormatDetails (const int pixelFormatIndex, 
-    jassert (context != 0);
+                                   OpenGLPixelFormat& result,
-    OpenGLContextInfo* const oc = (OpenGLContextInfo*) context;
+                                   const StringArray& availableExtensions) const throw()
-
-    SetWindowPos ((HWND) oc->nativeWindow->getNativeHandle(), 0,
-                  owner->getScreenX() - topComp->getScreenX(),
-                  owner->getScreenY() - topComp->getScreenY(),
-                  owner->getWidth(),
-                  owner->getHeight(),
-                  SWP_NOACTIVATE | SWP_NOZORDER | SWP_NOOWNERZORDER | SWP_NOSENDCHANGING);
-}
-
-void juce_deleteOpenGLContext (void* context)
-{
-    OpenGLContextInfo* const oc = (OpenGLContextInfo*) context;
-
-    if (oc != 0)
     {
-        wglDeleteContext (oc->renderContext);
+        PFNWGLGETPIXELFORMATATTRIBIVARBPROC wglGetPixelFormatAttribivARB = 0;
-        ReleaseDC ((HWND) oc->nativeWindow->getNativeHandle(), oc->dc);
 
-        deleteAndZero (oc->nativeWindow);
+        if (availableExtensions.contains ("WGL_ARB_pixel_format")
+             && WGL_EXT_FUNCTION_INIT (PFNWGLGETPIXELFORMATATTRIBIVARBPROC, wglGetPixelFormatAttribivARB))
+        {
+            int attributes[32];
+            int numAttributes = 0;
 
-        delete oc;
+            attributes[numAttributes++] = WGL_DRAW_TO_WINDOW_ARB;
+            attributes[numAttributes++] = WGL_SUPPORT_OPENGL_ARB;
+            attributes[numAttributes++] = WGL_ACCELERATION_ARB;
+            attributes[numAttributes++] = WGL_DOUBLE_BUFFER_ARB;
+            attributes[numAttributes++] = WGL_PIXEL_TYPE_ARB;
+            attributes[numAttributes++] = WGL_RED_BITS_ARB;
+            attributes[numAttributes++] = WGL_GREEN_BITS_ARB;
+            attributes[numAttributes++] = WGL_BLUE_BITS_ARB;
+            attributes[numAttributes++] = WGL_ALPHA_BITS_ARB;
+            attributes[numAttributes++] = WGL_DEPTH_BITS_ARB;
+            attributes[numAttributes++] = WGL_STENCIL_BITS_ARB;
+            attributes[numAttributes++] = WGL_ACCUM_RED_BITS_ARB;
+            attributes[numAttributes++] = WGL_ACCUM_GREEN_BITS_ARB;
+            attributes[numAttributes++] = WGL_ACCUM_BLUE_BITS_ARB;
+            attributes[numAttributes++] = WGL_ACCUM_ALPHA_BITS_ARB;
+
+            if (availableExtensions.contains ("WGL_ARB_multisample"))
+                attributes[numAttributes++] = WGL_SAMPLES_ARB;
+
+            int values[32];
+            zeromem (values, sizeof (values));
+
+            if (wglGetPixelFormatAttribivARB (dc, pixelFormatIndex, 0, numAttributes, attributes, values))
+            {
+                int n = 0;
+                bool isValidFormat = (values[n++] == GL_TRUE);      // WGL_DRAW_TO_WINDOW_ARB
+                isValidFormat = (values[n++] == GL_TRUE) && isValidFormat;   // WGL_SUPPORT_OPENGL_ARB
+                isValidFormat = (values[n++] == WGL_FULL_ACCELERATION_ARB) && isValidFormat; // WGL_ACCELERATION_ARB
+                isValidFormat = (values[n++] == GL_TRUE) && isValidFormat;   // WGL_DOUBLE_BUFFER_ARB:
+                isValidFormat = (values[n++] == WGL_TYPE_RGBA_ARB) && isValidFormat; // WGL_PIXEL_TYPE_ARB
+                result.redBits = values[n++];           // WGL_RED_BITS_ARB
+                result.greenBits = values[n++];         // WGL_GREEN_BITS_ARB
+                result.blueBits = values[n++];          // WGL_BLUE_BITS_ARB
+                result.alphaBits = values[n++];         // WGL_ALPHA_BITS_ARB
+                result.depthBufferBits = values[n++];   // WGL_DEPTH_BITS_ARB
+                result.stencilBufferBits = values[n++]; // WGL_STENCIL_BITS_ARB
+                result.accumulationBufferRedBits = values[n++];      // WGL_ACCUM_RED_BITS_ARB
+                result.accumulationBufferGreenBits = values[n++];    // WGL_ACCUM_GREEN_BITS_ARB
+                result.accumulationBufferBlueBits = values[n++];     // WGL_ACCUM_BLUE_BITS_ARB
+                result.accumulationBufferAlphaBits = values[n++];    // WGL_ACCUM_ALPHA_BITS_ARB
+                result.fullSceneAntiAliasingNumSamples = values[n++];       // WGL_SAMPLES_ARB
+
+                return isValidFormat;
+            }
+            else
+            {
+                jassertfalse
+            }
+        }
+        else
+        {
+            PIXELFORMATDESCRIPTOR pfd;
+
+            if (DescribePixelFormat (dc, pixelFormatIndex, sizeof (pfd), &pfd))
+            {
+                result.redBits = pfd.cRedBits;
+                result.greenBits = pfd.cGreenBits;
+                result.blueBits = pfd.cBlueBits;
+                result.alphaBits = pfd.cAlphaBits;
+                result.depthBufferBits = pfd.cDepthBits;
+                result.stencilBufferBits = pfd.cStencilBits;
+                result.accumulationBufferRedBits = pfd.cAccumRedBits;
+                result.accumulationBufferGreenBits = pfd.cAccumGreenBits;
+                result.accumulationBufferBlueBits = pfd.cAccumBlueBits;
+                result.accumulationBufferAlphaBits = pfd.cAccumAlphaBits;
+                result.fullSceneAntiAliasingNumSamples = 0;
+
+                return true;
+            }
+            else
+            {
+                jassertfalse
+            }
+        }
+
+        return false;
     }
+
+    WindowedGLContext (const WindowedGLContext&);
+    const WindowedGLContext& operator= (const WindowedGLContext&);
+};
+
+//==============================================================================
+OpenGLContext* OpenGLContext::createContextForWindow (Component* const component, 
+                                                      const OpenGLPixelFormat& pixelFormat,
+                                                      const OpenGLContext* const contextToShareWith)
+{
+    WindowedGLContext* c = new WindowedGLContext (component, 
+                                                  contextToShareWith != 0 ? (HGLRC) contextToShareWith->getRawContext() : 0);
+
+    if (c->renderContext == 0 || ! c->setPixelFormat (pixelFormat))
+        deleteAndZero (c);
+
+    return c;
 }
 
-bool juce_makeOpenGLContextCurrent (void* context)
+void juce_glViewport (const int w, const int h)
 {
-    OpenGLContextInfo* const oc = (OpenGLContextInfo*) context;
+    glViewport (0, 0, w, h);
-
-    if (oc != 0)
-        return wglMakeCurrent (oc->dc, oc->renderContext) != 0;
-    else
-        return wglMakeCurrent (0, 0) != 0;
 }
 
-bool juce_isActiveOpenGLContext (void* context) throw()
+void OpenGLPixelFormat::getAvailablePixelFormats (OwnedArray <OpenGLPixelFormat>& results)
 {
-    OpenGLContextInfo* const oc = (OpenGLContextInfo*) context;
+    Component tempComp;
 
-    jassert (oc != 0);
-    return wglGetCurrentContext() == oc->renderContext;
-}
-
-void juce_swapOpenGLBuffers (void* context)
-{
-    OpenGLContextInfo* const oc = (OpenGLContextInfo*) context;
-
-    if (oc != 0)
-        SwapBuffers (oc->dc);
-}
-
-void juce_repaintOpenGLWindow (void* context)
-{
-    OpenGLContextInfo* const oc = (OpenGLContextInfo*) context;
-
-    if (oc != 0)
     {
-        int x, y, w, h;
+        WindowedGLContext wc (&tempComp, 0);
-        oc->nativeWindow->getBounds (x, y, w, h);
+        wc.makeActive();
-        oc->nativeWindow->repaint (0, 0, w, h);
+        wc.findAlternativeOpenGLPixelFormats (results);
     }
 }
 
 #endif
 
 
+//==============================================================================
 //==============================================================================
 class JuceIStorage   : public IStorage
 {

docs/JUCE changelist.txt

@@ -14,6 +14,7 @@ Changelist for version 1.45
 - new class: FileSearchPathListComponent, for letting the user edit a FileSearchPath.
 - added a critical section option to ReferenceCountedArray
 - refactored and added features to the Socket class, replacing it with StreamableSocket (basically the same as the original class), and DatagramSocket.
+- refactored the OpenGLComponent, adding new classes OpenGLPixelFormat and OpenGLContext
 
 ==============================================================================
 Changelist for version 1.44

extras/juce demo/build/linux/JuceDemo.make

@@ -13,7 +13,7 @@ ifeq ($(CONFIG),Debug)
   CPPFLAGS := -MMD -D "LINUX=1" -D "DEBUG=1" -D "_DEBUG=1" -I "/usr/include"
   CFLAGS += $(CPPFLAGS) $(TARGET_ARCH) -g -D_DEBUG -ggdb
   CXXFLAGS := $(CFLAGS)
-  LDFLAGS += -L$(BINDIR) -L$(LIBDIR) -mwindows -L"/usr/X11R6/lib/" -L"../../../../bin" -lfreetype -lpthread -lrt -lX11 -lGL -lGLU -lXinerama -lasound -ljuce_debug
+  LDFLAGS += -L$(BINDIR) -L$(LIBDIR) -mwindows -L"/usr/X11R6/lib/" -L"../../../../bin" -lfreetype -lpthread -lrt -lX11 -lGL -lGLU -lXinerama -lasound -lXss -ljuce_debug
   LDDEPS :=
   RESFLAGS := -D "LINUX=1" -D "DEBUG=1" -D "_DEBUG=1" -I "/usr/include"
   TARGET := jucedemo
@@ -28,7 +28,7 @@ ifeq ($(CONFIG),Release)
   CPPFLAGS := -MMD -D "LINUX=1" -D "NDEBUG=1" -I "/usr/include"
   CFLAGS += $(CPPFLAGS) $(TARGET_ARCH) -O2
   CXXFLAGS := $(CFLAGS)
-  LDFLAGS += -L$(BINDIR) -L$(LIBDIR) -mwindows -s -L"/usr/X11R6/lib/" -L"../../../../bin" -lfreetype -lpthread -lrt -lX11 -lGL -lGLU -lXinerama -lasound -ljuce
+  LDFLAGS += -L$(BINDIR) -L$(LIBDIR) -mwindows -s -L"/usr/X11R6/lib/" -L"../../../../bin" -lfreetype -lpthread -lrt -lX11 -lGL -lGLU -lXinerama -lasound -lXss -ljuce
   LDDEPS :=
   RESFLAGS := -D "LINUX=1" -D "NDEBUG=1" -I "/usr/include"
   TARGET := jucedemo

extras/juce demo/build/linux/jucedemo_premake.lua

@@ -31,11 +31,11 @@ package.libpaths = {
 }
 
 package.config["Debug"].links = { 
-    "freetype", "pthread", "rt", "X11", "GL", "GLU", "Xinerama", "asound", "juce_debug"
+    "freetype", "pthread", "rt", "X11", "GL", "GLU", "Xinerama", "asound", "Xss", "juce_debug"
 }
 
 package.config["Release"].links = { 
-    "freetype", "pthread", "rt", "X11", "GL", "GLU", "Xinerama", "asound", "juce"
+    "freetype", "pthread", "rt", "X11", "GL", "GLU", "Xinerama", "asound", "Xss", "juce"
 }
 
 package.linkflags = { "static-runtime" }

extras/juce demo/src/demos/OpenGLDemo.cpp

@@ -81,6 +81,32 @@ public:
         delete im;
 
         startTimer (20);
+
+        // Just for demo purposes, let's dump a list of all the available pixel formats..
+        OwnedArray <OpenGLPixelFormat> availablePixelFormats;
+        OpenGLPixelFormat::getAvailablePixelFormats (availablePixelFormats);
+
+        for (int i = 0; i < availablePixelFormats.size(); ++i)
+        {
+            const OpenGLPixelFormat* const pixFormat = availablePixelFormats[i];
+
+            String formatDescription;
+            formatDescription
+              << i << ": RGBA=(" << pixFormat->redBits 
+              << ", " << pixFormat->greenBits 
+              << ", " << pixFormat->blueBits
+              << ", " << pixFormat->alphaBits
+              << "), depth=" << pixFormat->depthBufferBits
+              << ", stencil=" << pixFormat->stencilBufferBits
+              << ", accum RGBA=(" << pixFormat->accumulationBufferRedBits 
+              << ", " << pixFormat->accumulationBufferGreenBits 
+              << ", " << pixFormat->accumulationBufferBlueBits
+              << ", " << pixFormat->accumulationBufferAlphaBits 
+              << "), full-scene AA="
+              << pixFormat->fullSceneAntiAliasingNumSamples;
+
+            Logger::outputDebugString (formatDescription);
+        }
     }
 
     ~DemoOpenGLCanvas()

src/juce_appframework/gui/components/special/juce_OpenGLComponent.cpp

@@ -29,229 +29,216 @@
   ==============================================================================
 */
 
-#ifdef _MSC_VER
+#include "../../../../juce_core/basics/juce_StandardHeader.h"
-  #pragma warning (disable: 4514)
-  #pragma warning (push)
-#endif
-
-#include "../../../../../juce_Config.h"
 
 #if JUCE_OPENGL
 
-#ifdef _WIN32
-#include <windows.h>
-#include <gl/gl.h>
-#else
- #ifdef LINUX
-  #include <GL/glx.h>
- #else
-  #include <agl/agl.h>
- #endif
-#endif
-
-#include "../../../../juce_core/basics/juce_StandardHeader.h"
-
 BEGIN_JUCE_NAMESPACE
 
-#undef KeyPress
 #include "juce_OpenGLComponent.h"
-#include "../../graphics/geometry/juce_RectangleList.h"
-#include "../../../events/juce_Timer.h"
 #include "../layout/juce_ComponentMovementWatcher.h"
-
+#include "../../../../juce_core/threads/juce_ScopedLock.h"
-#ifdef _MSC_VER
-  #pragma warning (pop)
-#endif
-
-//==============================================================================
-extern void* juce_createOpenGLContext (OpenGLComponent* component, void* sharedContext);
-extern void juce_deleteOpenGLContext (void* context);
-extern bool juce_makeOpenGLContextCurrent (void* context);
-extern void juce_swapOpenGLBuffers (void* context);
-extern void juce_updateOpenGLWindowPos (void* context, Component* owner, Component* topComp);
-extern void juce_repaintOpenGLWindow (void* context);
-extern bool juce_isActiveOpenGLContext (void* context) throw();
-
-static VoidArray activeGLWindows (2);
 
 
 //==============================================================================
-class InternalGLContextHolder  : public ComponentMovementWatcher
+extern void juce_glViewport (const int w, const int h);
+
+
+//==============================================================================
+OpenGLPixelFormat::OpenGLPixelFormat (const int bitsPerRGBComponent,
+                                      const int alphaBits_,
+                                      const int depthBufferBits_,
+                                      const int stencilBufferBits_) throw()
+    : redBits (bitsPerRGBComponent),
+      greenBits (bitsPerRGBComponent),
+      blueBits (bitsPerRGBComponent),
+      alphaBits (alphaBits_),
+      depthBufferBits (depthBufferBits_),
+      stencilBufferBits (stencilBufferBits_),
+      accumulationBufferRedBits (0),
+      accumulationBufferGreenBits (0),
+      accumulationBufferBlueBits (0),
+      accumulationBufferAlphaBits (0),
+      fullSceneAntiAliasingNumSamples (0)
 {
-private:
+}
-    OpenGLComponent* owner;
-    void* context;
-    InternalGLContextHolder* sharedContext;
-    bool wasShowing;
 
+bool OpenGLPixelFormat::operator== (const OpenGLPixelFormat& other) const throw()
+{
+    return memcmp (this, &other, sizeof (other)) == 0;
+}
+
+
+//==============================================================================
+class OpenGLComponentWatcher  : public ComponentMovementWatcher
+{
 public:
-    bool needToUpdateViewport;
-
     //==============================================================================
-    InternalGLContextHolder (OpenGLComponent* const owner_,
+    OpenGLComponentWatcher (OpenGLComponent* const owner_)
-                             InternalGLContextHolder* const sharedContext_)
         : ComponentMovementWatcher (owner_),
           owner (owner_),
-          context (0),
+          wasShowing (false)
-          sharedContext (sharedContext_),
-          wasShowing (false),
-          needToUpdateViewport (true)
     {
     }
 
-    ~InternalGLContextHolder()
+    ~OpenGLComponentWatcher() {}
-    {
-        release();
-    }
-
-    //==============================================================================
-    void release()
-    {
-        if (context != 0)
-        {
-            juce_deleteOpenGLContext (context);
-            context = 0;
-        }
-    }
-
-    void initialise()
-    {
-        jassert (context == 0);
-
-        if (context == 0)
-        {
-            context = juce_createOpenGLContext (owner,
-                                                sharedContext != 0 ? sharedContext->context
-                                                                   : 0);
-
-            if (context != 0)
-            {
-                componentMovedOrResized (true, true);
-
-                if (makeCurrent())
-                    owner->newOpenGLContextCreated();
-            }
-        }
-    }
-
-    //==============================================================================
-    bool makeCurrent() const
-    {
-        return context != 0 && juce_makeOpenGLContextCurrent (context);
-    }
-
-    bool isActive() const throw()
-    {
-        return context != 0 && juce_isActiveOpenGLContext (context);
-    }
-
-    void swapBuffers() const
-    {
-        if (context != 0)
-            juce_swapOpenGLBuffers (context);
-    }
-
-    void repaint() const
-    {
-        if (context != 0)
-            juce_repaintOpenGLWindow (context);
-    }
 
     //==============================================================================
     void componentMovedOrResized (bool /*wasMoved*/, bool /*wasResized*/)
     {
-        if (owner->getWidth() > 0 && owner->getHeight() > 0)
+        owner->updateContextPosition();
-        {
-            Component* const topComp = owner->getTopLevelComponent();
-
-            if (topComp->getPeer() != 0)
-            {
-                needToUpdateViewport = true;
-
-                if (context == 0)
-                {
-                    if (owner->isShowing())
-                        initialise();
-                    else
-                        return;
-                }
-
-                if (context != 0)
-                    juce_updateOpenGLWindowPos (context, owner, topComp);
-            }
-        }
     }
 
     void componentPeerChanged()
     {
-        release();
+        const ScopedLock sl (owner->getContextLock());
-
+        owner->deleteContext();
-        if (owner->isShowing() && owner->getTopLevelComponent()->getPeer() != 0)
+        owner->createContext();
-            initialise();
     }
 
     void componentVisibilityChanged (Component&)
     {
-        if (wasShowing != owner->isShowing())
+        const bool isShowingNow = owner->isShowing();
+
+        if (wasShowing != isShowingNow)
         {
-            wasShowing = owner->isShowing();
+            wasShowing = isShowingNow;
-            componentMovedOrResized (true, true);
+            owner->updateContextPosition();
         }
     }
+
+    //==============================================================================
+    juce_UseDebuggingNewOperator
+
+private:
+    OpenGLComponent* const owner;
+    bool wasShowing;
 };
 
 //==============================================================================
-OpenGLComponent::OpenGLComponent (OpenGLComponent* share)
+OpenGLComponent::OpenGLComponent()
+    : context (0),
+      componentToShareListsWith (0),
+      needToUpdateViewport (true)
 {
     setOpaque (true);
-    internalData = new InternalGLContextHolder (this, (InternalGLContextHolder*) (share != 0 ? share->internalData : 0));
+    componentWatcher = new OpenGLComponentWatcher (this);
-
-    activeGLWindows.add (this);
 }
 
 OpenGLComponent::~OpenGLComponent()
 {
-    activeGLWindows.removeValue ((void*) this);
+    deleteContext();
+    delete componentWatcher;
+}
 
-    InternalGLContextHolder* const context = (InternalGLContextHolder*) internalData;
+void OpenGLComponent::createContext()
-    delete context;
+{
+    const ScopedLock sl (contextLock);
+
+    jassert (context == 0);
+
+    if (context == 0 && isShowing() && getTopLevelComponent()->getPeer() != 0)
+    {
+        context = OpenGLContext::createContextForWindow (this, 
+                                                         preferredPixelFormat, 
+                                                         componentToShareListsWith != 0 
+                                                             ? componentToShareListsWith->context 
+                                                             : 0);
+
+        if (context != 0)
+        {
+            updateContextPosition();
+
+            if (makeCurrentContextActive())
+                newOpenGLContextCreated();
+        }
+    }
+}
+
+void OpenGLComponent::deleteContext()
+{
+    const ScopedLock sl (contextLock);
+    deleteAndZero (context);
+}
+
+void OpenGLComponent::updateContextPosition()
+{
+    needToUpdateViewport = true;
+
+    if (getWidth() > 0 && getHeight() > 0)
+    {
+        Component* const topComp = getTopLevelComponent();
+
+        if (topComp->getPeer() != 0)
+        {
+            const ScopedLock sl (contextLock);
+
+            if (context == 0)
+                createContext();
+
+            if (context != 0)
+                context->updateWindowPosition (getScreenX() - topComp->getScreenX(),
+                                               getScreenY() - topComp->getScreenY(),
+                                               getWidth(),
+                                               getHeight(),
+                                               topComp->getHeight());
+        }
+    }
+}
+
+const OpenGLPixelFormat OpenGLComponent::getPixelFormat() const
+{
+    OpenGLPixelFormat pf;
+
+    const ScopedLock sl (contextLock);
+    if (context != 0)
+        pf = context->getPixelFormat();
+
+    return pf;
+}
+
+bool OpenGLComponent::setPixelFormat (const OpenGLPixelFormat& formatToUse)
+{
+    if (preferredPixelFormat == formatToUse)
+        return true;
+
+    const ScopedLock sl (contextLock);
+    deleteContext();
+    preferredPixelFormat = formatToUse;
+    createContext();
+
+    return context != 0;
+}
+
+void OpenGLComponent::shareWith (OpenGLComponent* const comp)
+{
+    if (componentToShareListsWith != comp)
+    {
+        const ScopedLock sl (contextLock);
+        deleteContext();
+        componentToShareListsWith = comp;
+        createContext();
+    }
 }
 
 bool OpenGLComponent::makeCurrentContextActive()
 {
-    InternalGLContextHolder* const context = (InternalGLContextHolder*) internalData;
+    return context != 0 && context->makeActive();
-    return context->makeCurrent();
 }
 
 void OpenGLComponent::makeCurrentContextInactive()
 {
-    juce_makeOpenGLContextCurrent (0);
+    if (context != 0)
+        context->makeInactive();
 }
 
 bool OpenGLComponent::isActiveContext() const throw()
 {
-    const InternalGLContextHolder* const context = (InternalGLContextHolder*) internalData;
-
     return context != 0 && context->isActive();
 }
 
-OpenGLComponent* OpenGLComponent::getCurrentlyActiveContextComponent() throw()
-{
-    for (int i = activeGLWindows.size(); --i >= 0;)
-    {
-        OpenGLComponent* const component = (OpenGLComponent*) activeGLWindows.getUnchecked(i);
-
-        if (component->isActiveContext())
-            return component;
-    }
-
-    return 0;
-}
-
 void OpenGLComponent::swapBuffers()
 {
-    InternalGLContextHolder* const context = (InternalGLContextHolder*) internalData;
-
     if (context != 0)
         context->swapBuffers();
 }
@@ -273,20 +260,19 @@ void OpenGLComponent::paint (Graphics&)
 
 bool OpenGLComponent::renderAndSwapBuffers()
 {
+    const ScopedLock sl (contextLock);
+
     if (! makeCurrentContextActive())
         return false;
 
-    InternalGLContextHolder* const context = (InternalGLContextHolder*) internalData;
+    if (needToUpdateViewport)
-
-    if (context->needToUpdateViewport)
     {
-        context->needToUpdateViewport = false;
+        needToUpdateViewport = false;
-        glViewport (0, 0, getWidth(), getHeight());
+        juce_glViewport (getWidth(), getHeight());
     }
 
     renderOpenGL();
-
+    swapBuffers();
-    context->swapBuffers();
 
     return true;
 }
@@ -295,8 +281,8 @@ void OpenGLComponent::internalRepaint (int x, int y, int w, int h)
 {
     Component::internalRepaint (x, y, w, h);
 
-    InternalGLContextHolder* const context = (InternalGLContextHolder*) internalData;
+    if (context != 0)
-    context->repaint();
+        context->repaint();
 }
 
 

src/juce_appframework/gui/components/special/juce_OpenGLComponent.h

@@ -37,6 +37,119 @@
 // this is used to disable OpenGL, and is defined in juce_Config.h
 #if JUCE_OPENGL || DOXYGEN
 
+class OpenGLComponentWatcher;
+
+
+//==============================================================================
+/**
+    Represents the various properties of an OpenGL bitmap format.
+
+    @see OpenGLComponent::setPixelFormat
+*/
+struct OpenGLPixelFormat
+{
+    //==============================================================================
+    /** Creates an OpenGLPixelFormat.
+
+        The default constructor just initialises the object as a simple 8-bit 
+        RGBA format.
+    */
+    OpenGLPixelFormat (const int bitsPerRGBComponent = 8,
+                       const int alphaBits = 8,
+                       const int depthBufferBits = 16,
+                       const int stencilBufferBits = 0) throw();
+
+    //==============================================================================
+    int redBits;          /**< The number of bits per pixel to use for the red channel. */
+    int greenBits;        /**< The number of bits per pixel to use for the green channel. */
+    int blueBits;         /**< The number of bits per pixel to use for the blue channel. */
+    int alphaBits;        /**< The number of bits per pixel to use for the alpha channel. */
+
+    int depthBufferBits;      /**< The number of bits per pixel to use for a depth buffer. */
+    int stencilBufferBits;    /**< The number of bits per pixel to use for a stencil buffer. */
+
+    int accumulationBufferRedBits;    /**< The number of bits per pixel to use for an accumulation buffer's red channel. */
+    int accumulationBufferGreenBits;  /**< The number of bits per pixel to use for an accumulation buffer's green channel. */
+    int accumulationBufferBlueBits;   /**< The number of bits per pixel to use for an accumulation buffer's blue channel. */
+    int accumulationBufferAlphaBits;  /**< The number of bits per pixel to use for an accumulation buffer's alpha channel. */
+
+    uint8 fullSceneAntiAliasingNumSamples;      /**< The number of samples to use in full-scene anti-aliasing (if available). */
+
+    //==============================================================================
+    /** Returns a list of all the pixel formats that can be used in this system.
+    */
+    static void getAvailablePixelFormats (OwnedArray <OpenGLPixelFormat>& results);
+
+    //==============================================================================
+    bool operator== (const OpenGLPixelFormat&) const throw();
+
+    juce_UseDebuggingNewOperator
+};
+
+//==============================================================================
+/**
+    A base class for types of OpenGL context.
+
+    An OpenGLComponent will supply its own context for drawing in its window.
+*/
+class OpenGLContext
+{
+public:
+    //==============================================================================
+    /** Destructor. */
+    virtual ~OpenGLContext() {}
+
+    //==============================================================================
+    /** Makes this context the currently active one. */
+    virtual bool makeActive() throw() = 0;
+    /** If this context is currently active, it is disactivated. */
+    virtual bool makeInactive() throw() = 0;
+    /** Returns true if this context is currently active. */
+    virtual bool isActive() const throw() = 0;
+
+    /** Swaps the buffers (if the context can do this). */
+    virtual void swapBuffers() = 0;
+
+    //==============================================================================
+    /** Returns the pixel format being used by this context. */
+    virtual const OpenGLPixelFormat getPixelFormat() const = 0;
+
+    /** For windowed contexts, this moves the context within the bounds of
+        its parent window.
+    */
+    virtual void updateWindowPosition (int x, int y, int w, int h, int outerWindowHeight) = 0;
+
+    /** For windowed contexts, this triggers a repaint of the window.
+
+        (Not relevent on all platforms).
+    */
+    virtual void repaint() = 0;
+
+    /** Returns an OS-dependent handle to the raw GL context.
+
+        On win32, this will be a HGLRC; on the Mac, an AGLContext; on Linux,
+        a GLXContext.
+    */
+    virtual void* getRawContext() const throw() = 0;
+
+    //==============================================================================
+    /** This tries to create a context that can be used for drawing into the
+        area occupied by the specified component.
+
+        Note that you probably shouldn't use this method directly unless you know what
+        you're doing - the OpenGLComponent calls this and manages the context for you.
+    */
+    static OpenGLContext* createContextForWindow (Component* componentToDrawTo,
+                                                  const OpenGLPixelFormat& pixelFormat, 
+                                                  const OpenGLContext* const contextToShareWith);
+
+    //==============================================================================
+    juce_UseDebuggingNewOperator
+
+protected:
+    OpenGLContext() throw() {};
+};
+
 
 //==============================================================================
 /**
@@ -51,42 +164,28 @@ class JUCE_API  OpenGLComponent  : public Component
 public:
     //==============================================================================
     /** Creates an OpenGLComponent.
-
-        @param componentToShareContextWith  if this is another OpenGLComponent, then
-                                            the two contexts will have their OpenGL contexts
-                                            shared
     */
-    OpenGLComponent (OpenGLComponent* componentToShareContextWith = 0);
+    OpenGLComponent();
 
     /** Destructor. */
     ~OpenGLComponent();
 
     //==============================================================================
-    /** Makes this component the current openGL context.
+    /** Changes the pixel format used by this component.
 
-        You might want to use this in things like your resize() method, before calling
+        @see OpenGLPixelFormat::getAvailablePixelFormats()
-        GL commands.
-
-        If this returns false, then the context isn't active, so you should avoid
-        making any calls.
     */
-    bool makeCurrentContextActive();
+    bool setPixelFormat (const OpenGLPixelFormat& formatToUse);
 
-    /** Stops the current component being the active OpenGL context.
+    /** Returns the pixel format that this component is currently using. */
+    const OpenGLPixelFormat getPixelFormat() const;
 
-        This is the opposite of makeCurrentContextActive()
+    /** Specifies another component whose OpenGL context should be shared with
+        this one.
+
+        This is an OpenGL feature that lets two contexts share their texture data.
     */
-    void makeCurrentContextInactive();
+    void shareWith (OpenGLComponent* const componentToShareListsWith);
-
-    /** Returns true if this component is the active openGL context for the
-        current thread.
-    */
-    bool isActiveContext() const throw();
-
-    /** Returns the OpenGLComponent that is currently the active context for
-        the current thread.
-    */
-    static OpenGLComponent* getCurrentlyActiveContextComponent() throw();
 
     //==============================================================================
     /** Flips the openGL buffers over. */
@@ -115,16 +214,63 @@ public:
     virtual void newOpenGLContextCreated() = 0;
 
 
+    //==============================================================================
+    /** Returns the context that will draw into this component.
+
+        This may return 0 if it failed to initialise properly, or if the component
+        is currently invisible. The context object may be deleted and a new one created 
+        during the life of this component - see newOpenGLContextCreated().
+    */
+    OpenGLContext* getCurrentContext() const throw();
+
+    /** Makes this component the current openGL context.
+
+        You might want to use this in things like your resize() method, before calling
+        GL commands.
+
+        If this returns false, then the context isn't active, so you should avoid
+        making any calls.
+
+        @see OpenGLContext::makeActive
+    */
+    bool makeCurrentContextActive();
+
+    /** Stops the current component being the active OpenGL context.
+
+        This is the opposite of makeCurrentContextActive()
+
+        @see OpenGLContext::makeInactive
+    */
+    void makeCurrentContextInactive();
+
+    /** Returns true if this component is the active openGL context for the
+        current thread.
+
+        @see OpenGLContext::isActive
+    */
+    bool isActiveContext() const throw();
+
+
     //==============================================================================
     /** Calls the rendering callback, and swaps the buffers afterwards.
 
-        Called by paint(), this can be overridden if you need to decouple the rendering
+        This is called automatically by paint() when the component needs to be rendered.
-        from the paint callback and render with a different thread.
+        
+        It can be overridden if you need to decouple the rendering from the paint callback 
+        and render with a custom thread.
 
         Returns true if the operation succeeded.
     */
     virtual bool renderAndSwapBuffers();
 
+    /** This returns a critical section that can be used to lock the current context.
+
+        Because the context that is used by this component can change, e.g. when the
+        component is shown or hidden, then if you're rendering to it on a background
+        thread, this allows you to lock the context for the duration of your rendering
+        routine.
+    */
+    CriticalSection& getContextLock() throw()       { return contextLock; }
 
     //==============================================================================
     /** @internal */
@@ -133,13 +279,23 @@ public:
     juce_UseDebuggingNewOperator
 
 private:
-    friend class InternalGLContextHolder;
+    friend class OpenGLComponentWatcher;
-    void* internalData;
+    OpenGLComponentWatcher* componentWatcher;
+
+    OpenGLContext* context;
+    OpenGLComponent* componentToShareListsWith;
+
+    CriticalSection contextLock;
+    OpenGLPixelFormat preferredPixelFormat;
+    bool needToUpdateViewport;
+
+    void createContext();
+    void deleteContext();
+    void updateContextPosition();
+    void internalRepaint (int x, int y, int w, int h);
 
     OpenGLComponent (const OpenGLComponent&);
     const OpenGLComponent& operator= (const OpenGLComponent&);
-
-    void internalRepaint (int x, int y, int w, int h);
 };