diff options
| -rw-r--r-- | src/opengl/qglpixelbuffer_win.cpp | 29 |
1 files changed, 18 insertions, 11 deletions
diff --git a/src/opengl/qglpixelbuffer_win.cpp b/src/opengl/qglpixelbuffer_win.cpp index b55f383..c61d9bf 100644 --- a/src/opengl/qglpixelbuffer_win.cpp +++ b/src/opengl/qglpixelbuffer_win.cpp @@ -172,6 +172,10 @@ typedef BOOL (WINAPI * PFNWGLSETPBUFFERATTRIBARBPROC) (HPBUFFERARB hPbuffer, con #define WGL_SAMPLES_ARB 0x2042 #endif +#ifndef GL_SAMPLES_ARB +#define GL_SAMPLES_ARB 0x80A9 +#endif + QGLFormat pfiToQGLFormat(HDC hdc, int pfi); static void qt_format_to_attrib_list(bool has_render_texture, const QGLFormat &f, int attribs[]) @@ -242,8 +246,7 @@ static void qt_format_to_attrib_list(bool has_render_texture, const QGLFormat &f bool QGLPixelBufferPrivate::init(const QSize &size, const QGLFormat &f, QGLWidget *shareWidget) { - QGLWidget dmy; - dmy.makeCurrent(); // needed for wglGetProcAddress() to succeed + QGLTemporaryContext tempContext; PFNWGLCREATEPBUFFERARBPROC wglCreatePbufferARB = (PFNWGLCREATEPBUFFERARBPROC) wglGetProcAddress("wglCreatePbufferARB"); @@ -257,13 +260,12 @@ bool QGLPixelBufferPrivate::init(const QSize &size, const QGLFormat &f, QGLWidge if (!wglCreatePbufferARB) // assumes that if one can be resolved, all of them can return false; - dc = GetDC(dmy.winId()); + dc = wglGetCurrentDC(); Q_ASSERT(dc); + has_render_texture = false; // sample buffers doesn't work in conjunction with the render_texture extension - if (f.sampleBuffers()) { - has_render_texture = false; - } else { + if (!f.sampleBuffers()) { PFNWGLGETEXTENSIONSSTRINGARBPROC wglGetExtensionsStringARB = (PFNWGLGETEXTENSIONSSTRINGARBPROC) wglGetProcAddress("wglGetExtensionsStringARB"); @@ -292,7 +294,6 @@ bool QGLPixelBufferPrivate::init(const QSize &size, const QGLFormat &f, QGLWidge if (num_formats == 0) { qWarning("QGLPixelBuffer: Unable to find a pixel format with pbuffer - giving up."); - ReleaseDC(dmy.winId(), dc); return false; } format = pfiToQGLFormat(dc, pixel_format); @@ -305,26 +306,32 @@ bool QGLPixelBufferPrivate::init(const QSize &size, const QGLFormat &f, QGLWidge pbuf = wglCreatePbufferARB(dc, pixel_format, size.width(), size.height(), has_render_texture ? pb_attribs : 0); - if(!pbuf) { + if (!pbuf) { // try again without the render_texture extension pbuf = wglCreatePbufferARB(dc, pixel_format, size.width(), size.height(), 0); has_render_texture = false; if (!pbuf) { qWarning("QGLPixelBuffer: Unable to create pbuffer [w=%d, h=%d] - giving up.", size.width(), size.height()); - ReleaseDC(dmy.winId(), dc); return false; } } - ReleaseDC(dmy.winId(), dc); dc = wglGetPbufferDCARB(pbuf); ctx = wglCreateContext(dc); - if (!dc || !ctx) { qWarning("QGLPixelBuffer: Unable to create pbuffer context - giving up."); return false; } + // Explicitly disable the render_texture extension if we have a + // multi-sampled pbuffer context. This seems to be a problem only with + // ATI cards if multi-sampling is forced globally in the driver. + wglMakeCurrent(dc, ctx); + GLint samples = 0; + glGetIntegerv(GL_SAMPLES_ARB, &samples); + if (has_render_texture && samples != 0) + has_render_texture = false; + HGLRC share_ctx = shareWidget ? shareWidget->d_func()->glcx->d_func()->rc : 0; if (share_ctx && !wglShareLists(share_ctx, ctx)) qWarning("QGLPixelBuffer: Unable to share display lists - with share widget."); |