Use alpha visuals.

diff --git a/glws_glx.cpp b/glws_glx.cpp
index efc11c4362fc7c7a72bc4915ddfde5346db30862..62bbb06e74c77905686708d1f6c7da088b0d24da 100644 (file)
--- a/glws_glx.cpp
+++ b/glws_glx.cpp
@@ -210,6 +210,7 @@ public:
             GLX_RED_SIZE, 1,
             GLX_GREEN_SIZE, 1,
             GLX_BLUE_SIZE, 1,
+            GLX_ALPHA_SIZE, 1,
             GLX_DEPTH_SIZE, 1,
             GLX_STENCIL_SIZE, 1,
             None
@@ -220,6 +221,7 @@ public:
             GLX_RED_SIZE, 1,
             GLX_GREEN_SIZE, 1,
             GLX_BLUE_SIZE, 1,
+            GLX_ALPHA_SIZE, 1,
             GLX_DOUBLEBUFFER,
             GLX_DEPTH_SIZE, 1,
             GLX_STENCIL_SIZE, 1,

diff --git a/glws_wgl.cpp b/glws_wgl.cpp
index b20374362a01f3301685b2152b4045b7367d2571..94390da221f3b8b13eed1d74622da2d09cedb06d 100644 (file)
--- a/glws_wgl.cpp
+++ b/glws_wgl.cpp
@@ -107,10 +107,11 @@ public:
         hDC = GetDC(hWnd);
    
         memset(&pfd, 0, sizeof pfd);
-        pfd.cColorBits = 3;
+        pfd.cColorBits = 4;
         pfd.cRedBits = 1;
         pfd.cGreenBits = 1;
         pfd.cBlueBits = 1;
+        pfd.cAlphaBits = 1;
         pfd.cDepthBits = 1;
         pfd.cStencilBits = 1;
         pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL;