use preview scale and remove viewport from reset_view

space_view3d_virtual_reality/hmd/debug.py

@@ -109,7 +109,7 @@ def view_setup():
     gluLookAt(0.0, 0.0, 1.0, 0.0,0.0,0.0, 0.0,1.0,0.0)
 
 
-def view_reset(viewport):
+def view_reset():
     # Get texture info
     glMatrixMode(GL_PROJECTION)
     glPopMatrix()
@@ -120,8 +120,6 @@ def view_reset(viewport):
     glMatrixMode(GL_MODELVIEW)
     glPopMatrix()
 
-    glViewport(viewport[0], viewport[1], viewport[2], viewport[3])
-
 
 # ##################
 # FBO related routines
@@ -237,7 +235,8 @@ class FBO:
         glDisable(GL_TEXTURE_2D)
         glDisable(GL_DEPTH_TEST)
 
-        view_reset(viewport)
+        view_reset()
+        glViewport(viewport[0], viewport[1], viewport[2], viewport[3])
 
         # unbinding
         glBindFramebuffer(GL_FRAMEBUFFER, act_fbo[0])

space_view3d_virtual_reality/opengl_helper.py

@@ -286,7 +286,7 @@ def view_setup():
     gluLookAt(0.0, 0.0, 1.0, 0.0,0.0,0.0, 0.0,1.0,0.0)
 
 
-def view_reset(viewport):
+def view_reset():
     # Get texture info
     glMatrixMode(GL_PROJECTION)
     glPopMatrix()
@@ -297,8 +297,6 @@ def view_reset(viewport):
     glMatrixMode(GL_MODELVIEW)
     glPopMatrix()
 
-    glViewport(viewport[0], viewport[1], viewport[2], viewport[3])
-
 
 def draw_rectangle_rainbow(zed=0.0):
     texco = [(1, 1), (0, 1), (0, 0), (1,0)]
@@ -371,7 +369,9 @@ def draw_callback_px(self, context):
     glUseProgram(0)
     glActiveTexture(act_tex[0])
     glBindTexture(GL_TEXTURE_2D, 0)
-    view_reset(self.viewport)
+    view_reset()
+    glViewport(self.viewport[0], self.viewport[1], self.viewport[2], self.viewport[3])
+
 
     glMatrixMode(GL_MODELVIEW)
     glTranslatef(-cam_pos[0], -cam_pos[1], -cam_pos[2])

space_view3d_virtual_reality/operator.py

@@ -54,7 +54,7 @@ class VirtualRealityDisplayOperator(bpy.types.Operator):
         if event.type == 'TIMER':
             self.loop()
 
-            if vr.use_preview:
+            if vr.preview_scale:
                 context.area.tag_redraw()
 
         return {'PASS_THROUGH'}
@@ -167,8 +167,7 @@ class VirtualRealityDisplayOperator(bpy.types.Operator):
         wm = context.window_manager
         vr = wm.virtual_reality
 
-        if vr.use_preview:
-            self._preview.loop()
+        self._preview.loop(vr.preview_scale)
 
 
 # ############################################################
@@ -181,11 +180,15 @@ class VirtualRealityInfo(bpy.types.PropertyGroup):
             default=False,
             )
 
-    use_preview = bpy.props.BoolProperty(
-            name="Preview",
-            default=False,
+    preview_scale = bpy.props.IntProperty(
+            name="Preview Scale",
+            min=0,
+            max=100,
+            default=100,
+            subtype='PERCENTAGE',
             )
 
+
 # ############################################################
 # Callbacks
 # ############################################################

space_view3d_virtual_reality/preview.py

@@ -59,47 +59,30 @@ class Preview:
         self._width = width
         self._height = height
 
-    def _getScissor(self, viewport, offset_x, offset_y, width, height):
-        """
-        Fit scissor inside viewport
-        """
-        scissor = [0,0,0,0]
-
-        scissor[0] = max(offset_x, viewport[0])
-        scissor[1] = max(offset_y, viewport[1])
-        scissor[2] = min(width, viewport[2] - (scissor[0] - viewport[0]))
-        scissor[3] = min(height, viewport[3] - (scissor[1] - viewport[1]))
-
-        return scissor
-
-    def loop(self):
+    def loop(self, scale):
         """
         Draw in the preview window
         """
-        texture = self._texture
-        width = self._width
-        height = self._height
+        if not scale:
+            return
 
-        offset_x, offset_y = 100, 100 # this is window offset, not viewport offset
+        texture = self._texture
 
         act_tex = Buffer(GL_INT, 1)
         glGetIntegerv(GL_ACTIVE_TEXTURE, act_tex)
 
-        viewport = Buffer(GL_INT, 4)
-        glGetIntegerv(GL_VIEWPORT, viewport)
+        if scale != 100:
+            viewport = Buffer(GL_INT, 4)
+            glGetIntegerv(GL_VIEWPORT, viewport)
 
-        glViewport(
-                max(offset_x, viewport[0]),
-                max(offset_x, viewport[1]),
-                width,
-                height,
-                )
+            width = int(scale * 0.01 * viewport[2])
+            height = int(scale * 0.01 * viewport[3])
 
-        scissor = self._getScissor(viewport, offset_x, offset_y, width, height)
-        glScissor(scissor[0], scissor[1], scissor[2], scissor[3])
+            glViewport(viewport[0], viewport[1], width, height)
+            glScissor(viewport[0], viewport[1], width, height)
 
-        glEnable(GL_DEPTH_TEST)
-        glDepthFunc(GL_LESS)
+            glEnable(GL_DEPTH_TEST)
+            glDepthFunc(GL_LESS)
 
         view_setup()
 
@@ -114,8 +97,9 @@ class Preview:
         glDisable(GL_TEXTURE_2D)
         glDisable(GL_DEPTH_TEST)
 
-        view_reset(viewport)
+        view_reset()
 
-        glViewport(viewport[0], viewport[1], viewport[2], viewport[3])
-        glScissor(viewport[0], viewport[1], viewport[2], viewport[3])
+        if scale != 100:
+            glViewport(viewport[0], viewport[1], viewport[2], viewport[3])
+            glScissor(viewport[0], viewport[1], viewport[2], viewport[3])
 

space_view3d_virtual_reality/ui.py

@@ -23,8 +23,9 @@ class VirtualRealityPanel(bpy.types.Panel):
             col.operator("view3d.virtual_reality_display", text="Virtual Reality", icon="PLAY").action='ENABLE'
         else:
             col.operator("view3d.virtual_reality_display", text="Virtual Reality", icon="X").action='DISABLE'
+
             col.separator()
-            col.prop(vr, "use_preview")
+            col.prop(vr, "preview_scale", text="Preview")
 
 
 # ############################################################