1 files changed, 42 insertions, 22 deletions

diff --git a/progs/wgl/wglthreads/wglthreads.c b/progs/wgl/wglthreads/wglthreads.c
index 9ca7f025dc..27dca10f2a 100644
--- a/progs/wgl/wglthreads/wglthreads.c
+++ b/progs/wgl/wglthreads/wglthreads.c
@@ -72,6 +72,7 @@ struct winthread {
    int WinWidth, WinHeight;
    GLboolean NewSize;
    HANDLE hEventInitialised;
+   GLboolean Initialized;
    GLboolean MakeNewTexture;
    HANDLE hEventRedraw;
 };
@@ -114,20 +115,20 @@ static void
 MakeNewTexture(struct winthread *wt)
 {
 #define TEX_SIZE 128
-   static float step = 0.0;
+   static float step = 0.0f;
    GLfloat image[TEX_SIZE][TEX_SIZE][4];
    GLint width;
    int i, j;
 
    for (j = 0; j < TEX_SIZE; j++) {
       for (i = 0; i < TEX_SIZE; i++) {
-         float dt = 5.0 * (j - 0.5 * TEX_SIZE) / TEX_SIZE;
-         float ds = 5.0 * (i - 0.5 * TEX_SIZE) / TEX_SIZE;
+         float dt = 5.0f * (j - 0.5f * TEX_SIZE) / TEX_SIZE;
+         float ds = 5.0f * (i - 0.5f * TEX_SIZE) / TEX_SIZE;
          float r = dt * dt + ds * ds + step;
          image[j][i][0] = 
          image[j][i][1] = 
-         image[j][i][2] = 0.75 + 0.25 * cos(r);
-         image[j][i][3] = 1.0;
+         image[j][i][2] = 0.75f + 0.25f * (float) cos(r);
+         image[j][i][3] = 1.0f;
       }
    }
 
@@ -159,7 +160,7 @@ static void
 draw_object(void)
 {
    glPushMatrix();
-   glScalef(0.75, 0.75, 0.75);
+   glScalef(0.75f, 0.75f, 0.75f);
 
    glColor3f(1, 0, 0);
 
@@ -288,6 +289,15 @@ draw_loop(struct winthread *wt)
 
       wglMakeCurrent(wt->hDC, wt->Context);
 
+      if (!wt->Initialized) {
+         printf("wglthreads: %d: GL_RENDERER = %s\n", wt->Index,
+                (char *) glGetString(GL_RENDERER));
+         if (Texture /*&& wt->Index == 0*/) {
+            MakeNewTexture(wt);
+         }
+         wt->Initialized = GL_TRUE;
+      }
+
       if (Locking)
          LeaveCriticalSection(&Mutex);
 
@@ -315,13 +325,15 @@ draw_loop(struct winthread *wt)
       glPushMatrix();
          glRotatef(wt->Angle, 0, 1, 0);
          glRotatef(wt->Angle, 1, 0, 0);
-         glScalef(0.7, 0.7, 0.7);
+         glScalef(0.7f, 0.7f, 0.7f);
          draw_object();
       glPopMatrix();
 
       if (Locking)
          EnterCriticalSection(&Mutex);
+
       SwapBuffers(wt->hDC);
+
       if (Locking)
          LeaveCriticalSection(&Mutex);
 
@@ -433,7 +445,7 @@ create_window(struct winthread *wt, HGLRC shareCtx)
    win = CreateWindowEx(0,
                         wc.lpszClassName,
                         "wglthreads",
-                        WS_VISIBLE | WS_CLIPSIBLINGS | WS_CLIPCHILDREN,
+                        WS_VISIBLE | WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_TILEDWINDOW,
                         xpos,
                         ypos,
                         width,
@@ -471,7 +483,8 @@ create_window(struct winthread *wt, HGLRC shareCtx)
    }
 
    if (shareCtx) {
-      wglShareLists(shareCtx, ctx);
+      if(!wglShareLists(shareCtx, ctx))
+         Error("Couldn't share WGL context lists");
    }
 
    /* save the info for this window/context */
@@ -482,14 +495,6 @@ create_window(struct winthread *wt, HGLRC shareCtx)
    wt->WinWidth = width;
    wt->WinHeight = height;
    wt->NewSize = GL_TRUE;
-
-   wglMakeCurrent(hdc, ctx);
-   printf("wglthreads: %d: GL_RENDERER = %s\n", wt->Index, (char *) glGetString(GL_RENDERER));
-   wglMakeCurrent(NULL, NULL);
-
-   if (Texture/* && wt->Index == 0*/) {
-      MakeNewTexture(wt);
-   }
 }
 
 
@@ -502,10 +507,22 @@ ThreadProc(void *p)
    struct winthread *wt = (struct winthread *) p;
    HGLRC share;
 
+   /* Wait for the previous thread */
+   if(Texture && wt->Index > 0) {
+      WaitForSingleObject(WinThreads[wt->Index - 1].hEventInitialised, INFINITE);
+      share = WinThreads[0].Context;
+   }
+   else
+      share = 0;
+
    share = (Texture && wt->Index > 0) ? WinThreads[0].Context : 0;
    create_window(wt, share);
    SetEvent(wt->hEventInitialised);
 
+   /* Wait for all threads to initialize otherwise wglShareLists will fail */
+   if(wt->Index < NumWinThreads - 1)
+      WaitForSingleObject(WinThreads[NumWinThreads - 1].hEventInitialised, INFINITE);
+
    draw_loop(wt);
    return 0;
 }
@@ -539,6 +556,7 @@ main(int argc, char *argv[])
    for (i = 1; i < argc; i++) {
       if (strcmp(argv[i], "-h") == 0) {
          usage();
+         exit(0);
       }
       else if (strcmp(argv[i], "-l") == 0) {
          Locking = 1;
@@ -588,13 +606,17 @@ main(int argc, char *argv[])
 
       printf("wglthreads: creating threads\n");
 
-      /* Create the threads */
+      /* Create the events */
       for (i = 0; i < NumWinThreads; i++) {
-         DWORD id;
-
          WinThreads[i].Index = i;
          WinThreads[i].hEventInitialised = CreateEvent(NULL, TRUE, FALSE, NULL);
          WinThreads[i].hEventRedraw = CreateEvent(NULL, FALSE, FALSE, NULL);
+      }
+
+      /* Create the threads */
+      for (i = 0; i < NumWinThreads; i++) {
+         DWORD id;
+
          WinThreads[i].Thread = CreateThread(NULL,
                                              0,
                                              ThreadProc,
@@ -603,8 +625,6 @@ main(int argc, char *argv[])
                                              &id);
          printf("wglthreads: Created thread %p\n", (void *) WinThreads[i].Thread);
 
-         WaitForSingleObject(WinThreads[i].hEventInitialised, INFINITE);
-
          threads[i] = WinThreads[i].Thread;
       }