diff options
Diffstat (limited to 'intern/ghost/intern/GHOST_ContextWGL.cpp')
| -rw-r--r-- | intern/ghost/intern/GHOST_ContextWGL.cpp | 175 |
1 files changed, 40 insertions, 135 deletions
diff --git a/intern/ghost/intern/GHOST_ContextWGL.cpp b/intern/ghost/intern/GHOST_ContextWGL.cpp index d2dd38878f7..e6498f1ffa8 100644 --- a/intern/ghost/intern/GHOST_ContextWGL.cpp +++ b/intern/ghost/intern/GHOST_ContextWGL.cpp @@ -745,60 +745,57 @@ static void reportContextString(const char *name, const char *dummy, const char GHOST_TSuccess GHOST_ContextWGL::initializeDrawingContext() { - const bool needAlpha = m_alphaBackground; + SetLastError(NO_ERROR); + + HGLRC prevHGLRC = ::wglGetCurrentContext(); + WIN32_CHK(GetLastError() == NO_ERROR); + + HDC prevHDC = ::wglGetCurrentDC(); + WIN32_CHK(GetLastError() == NO_ERROR); + + if (!WGLEW_ARB_create_context || ::GetPixelFormat(m_hDC) == 0) { + const bool needAlpha = m_alphaBackground; #ifdef GHOST_OPENGL_STENCIL - const bool needStencil = true; + const bool needStencil = true; #else - const bool needStencil = false; + const bool needStencil = false; #endif #ifdef GHOST_OPENGL_SRGB - const bool sRGB = true; + const bool sRGB = true; #else - const bool sRGB = false; + const bool sRGB = false; #endif + int iPixelFormat; + int lastPFD; - HGLRC prevHGLRC; - HDC prevHDC; - - int iPixelFormat; - int lastPFD; - - PIXELFORMATDESCRIPTOR chosenPFD; + PIXELFORMATDESCRIPTOR chosenPFD; + iPixelFormat = choose_pixel_format(m_stereoVisual, m_numOfAASamples, needAlpha, needStencil, sRGB); - SetLastError(NO_ERROR); - - prevHGLRC = ::wglGetCurrentContext(); - WIN32_CHK(GetLastError() == NO_ERROR); - - prevHDC = ::wglGetCurrentDC(); - WIN32_CHK(GetLastError() == NO_ERROR); - - iPixelFormat = choose_pixel_format(m_stereoVisual, m_numOfAASamples, needAlpha, needStencil, sRGB); - - if (iPixelFormat == 0) { - ::wglMakeCurrent(prevHDC, prevHGLRC); - return GHOST_kFailure; - } + if (iPixelFormat == 0) { + ::wglMakeCurrent(prevHDC, prevHGLRC); + return GHOST_kFailure; + } - lastPFD = ::DescribePixelFormat(m_hDC, iPixelFormat, sizeof(PIXELFORMATDESCRIPTOR), &chosenPFD); + lastPFD = ::DescribePixelFormat(m_hDC, iPixelFormat, sizeof(PIXELFORMATDESCRIPTOR), &chosenPFD); - if (!WIN32_CHK(lastPFD != 0)) { - ::wglMakeCurrent(prevHDC, prevHGLRC); - return GHOST_kFailure; - } + if (!WIN32_CHK(lastPFD != 0)) { + ::wglMakeCurrent(prevHDC, prevHGLRC); + return GHOST_kFailure; + } - if (needAlpha && chosenPFD.cAlphaBits == 0) - fprintf(stderr, "Warning! Unable to find a pixel format with an alpha channel.\n"); + if (needAlpha && chosenPFD.cAlphaBits == 0) + fprintf(stderr, "Warning! Unable to find a pixel format with an alpha channel.\n"); - if (needStencil && chosenPFD.cStencilBits == 0) - fprintf(stderr, "Warning! Unable to find a pixel format with a stencil buffer.\n"); + if (needStencil && chosenPFD.cStencilBits == 0) + fprintf(stderr, "Warning! Unable to find a pixel format with a stencil buffer.\n"); - if (!WIN32_CHK(::SetPixelFormat(m_hDC, iPixelFormat, &chosenPFD))) { - ::wglMakeCurrent(prevHDC, prevHGLRC); - return GHOST_kFailure; + if (!WIN32_CHK(::SetPixelFormat(m_hDC, iPixelFormat, &chosenPFD))) { + ::wglMakeCurrent(prevHDC, prevHGLRC); + return GHOST_kFailure; + } } if (WGLEW_ARB_create_context) { @@ -909,9 +906,11 @@ GHOST_TSuccess GHOST_ContextWGL::initializeDrawingContext() const char *version = reinterpret_cast<const char*>(glGetString(GL_VERSION)); #ifndef NDEBUG - reportContextString("Vendor", m_dummyVendor, vendor); - reportContextString("Renderer", m_dummyRenderer, renderer); - reportContextString("Version", m_dummyVersion, version); + if (m_dummyVendor != NULL) { + reportContextString("Vendor", m_dummyVendor, vendor); + reportContextString("Renderer", m_dummyRenderer, renderer); + reportContextString("Version", m_dummyVersion, version); + } #endif return GHOST_kSuccess; @@ -927,97 +926,3 @@ GHOST_TSuccess GHOST_ContextWGL::releaseNativeHandles() return success; } - -/** - * For any given HDC you may call SetPixelFormat once - * - * So we better try to get the correct OpenGL version in a new window altogether, in case it fails. - * (see https://msdn.microsoft.com/en-us/library/windows/desktop/dd369049(v=vs.85).aspx) - */ -static bool TryOpenGLVersion( - HWND hwnd, - bool wantStereoVisual, - bool wantAlphaBackground, - GHOST_TUns16 wantNumOfAASamples, - int contextProfileMask, - bool debugContext, - int major, int minor) -{ - HWND dummyHWND = clone_window(hwnd, NULL); - if (dummyHWND == NULL) { - return false; - } - - HDC dummyHDC = GetDC(dummyHWND); - if (dummyHDC == NULL) { - return false; - } - - GHOST_ContextWGL * context = new GHOST_ContextWGL( - wantStereoVisual, - wantAlphaBackground, - wantNumOfAASamples, - dummyHWND, - dummyHDC, - contextProfileMask, - major, minor, - (debugContext ? WGL_CONTEXT_DEBUG_BIT_ARB : 0), - GHOST_OPENGL_WGL_RESET_NOTIFICATION_STRATEGY); - - bool result = context->initializeDrawingContext(); - delete context; - - ReleaseDC(dummyHWND, dummyHDC); - DestroyWindow(dummyHWND); - - return result; -} - -GHOST_TSuccess GHOST_ContextWGL::getMaximumSupportedOpenGLVersion( - HWND hwnd, - bool wantStereoVisual, - bool wantAlphaBackground, - GHOST_TUns16 wantNumOfAASamples, - int contextProfileMask, - bool debugContext, - GHOST_TUns8 *r_major_version, - GHOST_TUns8 *r_minor_version) -{ - /* - AMD and Intel give us exactly this version - * - NVIDIA gives at least this version <-- desired behavior - * So we ask for 4.5, 4.4 ... 3.3 in descending order to get the best version on the user's system. */ - for (int minor = 5; minor >= 0; --minor) { - if (TryOpenGLVersion( - hwnd, - wantStereoVisual, - wantAlphaBackground, - wantNumOfAASamples, - contextProfileMask, - debugContext, - 4, minor)) - { - *r_major_version = 4; - *r_minor_version = minor; - return GHOST_kSuccess; - } - } - - /* Fallback to OpenGL 3.3 */ - if (TryOpenGLVersion( - hwnd, - wantStereoVisual, - wantAlphaBackground, - wantNumOfAASamples, - contextProfileMask, - debugContext, - 3, 3)) - { - *r_major_version = 3; - *r_minor_version = 3; - return GHOST_kSuccess; - } - - *r_major_version = 0; - *r_minor_version = 0; - return GHOST_kFailure; -} |