1 files changed, 54 insertions, 8 deletions

diff --git a/generic/tkZinc.c b/generic/tkZinc.c
index f9e9193..d6e5215 100644
--- a/generic/tkZinc.c
+++ b/generic/tkZinc.c
@@ -422,7 +422,7 @@ static Tk_ConfigSpec config_specs[] = {
    "0", Tk_Offset(ZnWInfo, screen_rotation), 0, NULL},
 #endif
   /* Use damage option (only used if -render is set to 1 ie if we use GL */
-  {TK_CONFIG_BOOLEAN, "-usedamage", "useDamage", "UseDamage",
+  {TK_CONFIG_INT, "-usedamage", "useDamage", "UseDamage",
    "0", Tk_Offset(ZnWInfo, usedamage), 0, NULL},
   {TK_CONFIG_END, NULL, NULL, NULL, NULL, 0, 0, NULL}
 };
@@ -539,7 +539,7 @@ static Tk_OptionSpec option_specs[] = {
      "0", -1, Tk_Offset(ZnWInfo, screen_rotation), 0, NULL, CONFIG_ROTATION},
 #endif
   /* Use damage option (only used if -render is set to 1 ie if we use GL */
-  {TK_OPTION_BOOLEAN, "-usedamage", "useDamage", "UseDamage",
+  {TK_OPTION_INT, "-usedamage", "useDamage", "UseDamage",
      "0", -1, Tk_Offset(ZnWInfo, usedamage), 0, NULL, 0},
   {TK_OPTION_END, NULL, NULL, NULL, NULL, 0, 0, 0, NULL, 0}
 };
@@ -8867,17 +8867,47 @@ Repair(ZnWInfo  *wi)
     //
     // glViewport and glOrtho must always be used together with
     // matching parameters to keep the mapping straight (no distorsion).
-    glViewport(darea_x1, wi->height - darea_y2, darea_x2 - darea_x1, darea_y2 - darea_y1);
-    glMatrixMode(GL_PROJECTION);
-    glLoadIdentity();
-    glOrtho(darea_x1, darea_x2, darea_y2, darea_y1, -1.0, 1.0);
-    glMatrixMode(GL_MODELVIEW);
+    if (wi->usedamage == 2) {
+      // usedamage == 2
+      glViewport(0, 0, wi->width, wi->height);
+      glMatrixMode(GL_PROJECTION);
+      glLoadIdentity();
+      glOrtho(0, wi->width, wi->height, 0, -1.0, 1.0);
+      glMatrixMode(GL_MODELVIEW);
+    } 
+    else {
+      glViewport(darea_x1, wi->height - darea_y2, darea_x2 - darea_x1, darea_y2 - darea_y1);
+      glMatrixMode(GL_PROJECTION);
+      glLoadIdentity();
+      glOrtho(darea_x1, darea_x2, darea_y2, darea_y1, -1.0, 1.0);
+      glMatrixMode(GL_MODELVIEW);
+    }
+    
     /*
      * Clear the GL buffers.
      */
     glClear(GL_STENCIL_BUFFER_BIT);
 
     /*
+     * Use clipping if needed (optimization for non-Nvidia cards)
+     */
+    if (wi->usedamage == 2) {
+      // Clip the damaged region
+      // This point array will contain our damage mask coordinates
+      ZnPoint _ptClip [ 2 ];
+      // This triangle strip will contain our specific damage clipping zone.
+      ZnTriStrip    tristripClip;
+      _ptClip [0].x = darea_x1; 
+      _ptClip [0].y = darea_y1;
+      _ptClip [1].x = darea_x2;
+      _ptClip [1].y = darea_y2;
+
+      ZnTriStrip1(&tristripClip, _ptClip, 2, False);
+      ZnPushClip(wi, &tristripClip, True, True);
+    }
+
+
+    /*
      * Setup the background tile or the background color.
      */
     if (wi->tile != ZnUnspecifiedImage) {
@@ -8901,6 +8931,15 @@ Repair(ZnWInfo  *wi)
 
     wi->top_group->class->Render(wi->top_group);
 
+
+   /*
+    * Stop clipping if needed (optimizations for non-Nvidia cards)
+    */
+    if (wi->usedamage == 2) {
+       // Stop clipping !
+      ZnPopClip(wi, True);
+    }
+
 #if defined(GL) && defined(ROTATION)
     if (wi->enable_rotation) {
       FinalizeRotation(wi);
@@ -8911,7 +8950,14 @@ Repair(ZnWInfo  *wi)
       unsigned short alpha;
 
       /* Test if we are using damage or not */
-      if (wi->usedamage) {
+      if (wi->usedamage == 2) {
+         glViewport(0, 0, wi->width, wi->height);
+         glMatrixMode(GL_PROJECTION);
+         glLoadIdentity();
+         glOrtho(0.0, wi->width, wi->height, 0.0, -1.0, 1.0);
+         glMatrixMode(GL_MODELVIEW);
+      }
+      else {
          glViewport(0, 0, wi->opt_width, wi->opt_height);
          glMatrixMode(GL_PROJECTION);
          glLoadIdentity();