David's final changes: more profiler features, fixes.
[ipdf/code.git] / src / view.cpp
index 53511d2..3d984ee 100644 (file)
@@ -1,6 +1,7 @@
 #include "view.h"
 #include "bufferbuilder.h"
 #include "screen.h"
+#include "profiler.h"
 #include "gl_core44.h"
 
 #ifndef CONTROLPANEL_DISABLED
@@ -25,11 +26,12 @@ using namespace std;
  * @param colour - Colour to use for rendering this view. TODO: Make sure this actually works, or just remove it
  */
 View::View(Document & document, Screen & screen, const VRect & bounds, const Colour & colour)
-       : m_use_gpu_transform(USE_GPU_TRANSFORM), m_use_gpu_rendering(USE_GPU_RENDERING), m_bounds_dirty(true), m_buffer_dirty(true), 
+       : m_use_gpu_transform(false), m_use_gpu_rendering(USE_GPU_RENDERING), m_bounds_dirty(true), m_buffer_dirty(true), 
                m_render_dirty(true), m_document(document), m_screen(screen), m_cached_display(), m_bounds(bounds), m_colour(colour), m_bounds_ubo(), 
                m_objbounds_vbo(), m_object_renderers(NUMBER_OF_OBJECT_TYPES), m_cpu_rendering_pixels(NULL),
                m_perform_shading(USE_SHADING), m_show_bezier_bounds(false), m_show_bezier_type(false),
-               m_show_fill_points(false), m_show_fill_bounds(false), m_lazy_rendering(true)
+               m_show_fill_points(false), m_show_fill_bounds(false), m_lazy_rendering(true),
+               m_query_gpu_bounds_on_next_frame(NULL)
 {
        Debug("View Created - Bounds => {%s}", m_bounds.Str().c_str());
 
@@ -86,6 +88,7 @@ View::~View()
  */
 void View::Translate(Real x, Real y)
 {
+       PROFILE_SCOPE("View::Translate");       
        if (!m_use_gpu_transform)
                m_buffer_dirty = true;
        m_bounds_dirty = true;
@@ -109,6 +112,14 @@ void View::Translate(Real x, Real y)
  */
 void View::SetBounds(const Rect & bounds)
 {
+       #ifdef TRANSFORM_OBJECTS_NOT_VIEW
+       ObjectType type = NUMBER_OF_OBJECT_TYPES;
+       #ifdef TRANSFORM_BEZIERS_TO_PATH
+               type = PATH;
+       #endif
+       SVGMatrix transform = {Real(m_bounds.w)/bounds.w, 0, Real(m_bounds.x) - bounds.x, 0,Real(m_bounds.h)/bounds.h, Real(m_bounds.y) - bounds.y};
+       m_document.TransformObjectBounds(transform, type);
+       #endif
        m_bounds.x = bounds.x;
        m_bounds.y = bounds.y;
        m_bounds.w = bounds.w;
@@ -125,7 +136,7 @@ void View::SetBounds(const Rect & bounds)
  */
 void View::ScaleAroundPoint(Real x, Real y, Real scale_amount)
 {
-       
+       PROFILE_SCOPE("View::ScaleAroundPoint");        
        // (x0, y0, w, h) -> (x*w - (x*w - x0)*s, y*h - (y*h - y0)*s, w*s, h*s)
        // x and y are coordinates in the window
        // Convert to local coords.
@@ -156,6 +167,10 @@ void View::ScaleAroundPoint(Real x, Real y, Real scale_amount)
        m_bounds.y = vy - top;
        m_bounds.w *= scale_amount;
        m_bounds.h *= scale_amount;
+       if (m_bounds.w == VReal(0))
+       {
+               Debug("Scaled to zero!!!");
+       }
        //Debug("Scale at {%s, %s} by %s View Bounds => %s", x.Str().c_str(), y.Str().c_str(), scale_amount.Str().c_str(), m_bounds.Str().c_str());
        
        
@@ -184,6 +199,7 @@ Rect View::TransformToViewCoords(const Rect& inp) const
  */
 void View::Render(int width, int height)
 {
+       PROFILE_SCOPE("View::Render()");
        if (!m_screen.Valid()) return;
        glPushDebugGroup(GL_DEBUG_SOURCE_APPLICATION,42,-1, "Beginning View::Render()");
        // View dimensions have changed (ie: Window was resized)
@@ -207,43 +223,61 @@ void View::Render(int width, int height)
        m_cached_display.Clear();
 
 #ifndef QUADTREE_DISABLED
+       // I'm going to write this out in comments, so hopefully then I'll understand it. :/
+       //
+       // This code looks at the current bounds and tries to work out how they need to change
+       // to keep the view looking at the correct quadtree node.
+       //
+       // The idea is that the width/height of the view bounds are always 0.5<=wh<=1.0. We then always
+       // try to keep the bottom-right corner of the node on-screen, changing nodes to suit. Why bottom-right,
+       // you may ask. It's an excellent question, with a dubious, hand-wavey answer: because we're manipulating
+       // the bounds, it was easier to do it that way. (The top-left corner of the bounds are within the main
+       // quadtree node).
        if (m_bounds_dirty || !m_lazy_rendering)
        {
-               if ( m_bounds.w > 1.0 || m_bounds.h > 1.0)
+               g_profiler.BeginZone("View::Render -- Quadtree view bounds management");
+               // If we're too far zoomed out, become the parent of the current node.
+               while ( m_bounds.w > 1.0 || m_bounds.h > 1.0)
                {
-                       //TODO: Generate a new parent node.
+                       // If a parent node exists, we'll become it.
+                       //TODO: Generate a new parent node if none exists, and work out when to change child_type
+                       // away from QTC_UNKNOWN
                        if (m_document.GetQuadTree().nodes[m_current_quadtree_node].parent != QUADTREE_EMPTY)
                        {
                                m_bounds = TransformFromQuadChild(m_bounds, m_document.GetQuadTree().nodes[m_current_quadtree_node].child_type);
                                m_current_quadtree_node = m_document.GetQuadTree().nodes[m_current_quadtree_node].parent;
                        }
+                       else break;
                }
 
-               // TODO: Support generating new parent nodes.
-               if (false && m_document.GetQuadTree().nodes[m_current_quadtree_node].parent != QUADTREE_EMPTY)
+               // If we have a parent... (This prevents some crashes, but should disappear.)
+               if (m_document.GetQuadTree().nodes[m_current_quadtree_node].parent != QUADTREE_EMPTY)
                {
-                       if (m_bounds.x < -0.5)
-                       {
-                               m_bounds = Rect(m_bounds.x + 1, m_bounds.y, m_bounds.w, m_bounds.h);
-                               m_current_quadtree_node = m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, -1, 0, &m_document);
-                       }
-                       if (m_bounds.y < -0.5)
-                       {
-                               m_bounds = Rect(m_bounds.x, m_bounds.y + 1, m_bounds.w, m_bounds.h);
-                               m_current_quadtree_node = m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, 0, -1, &m_document);
-                       }
-                       if (m_bounds.w + m_bounds.x > 0.5)
+                       // If the current node is off the left-hand side of the screen...
+                       while (m_bounds.x > 1)
                        {
+                               //... the current node becomes the node to its right.
                                m_bounds = Rect(m_bounds.x - 1, m_bounds.y, m_bounds.w, m_bounds.h);
                                m_current_quadtree_node = m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, 1, 0, &m_document);
                        }
-                       if (m_bounds.h + m_bounds.y > 0.5)
+                       while (m_bounds.y > 1)
                        {
                                m_bounds = Rect(m_bounds.x, m_bounds.y - 1, m_bounds.w, m_bounds.h);
                                m_current_quadtree_node = m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, 0, 1, &m_document);
                        }
+                       while (m_bounds.x < 0)
+                       {
+                               m_bounds = Rect(m_bounds.x + 1, m_bounds.y, m_bounds.w, m_bounds.h);
+                               m_current_quadtree_node = m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, -1, 0, &m_document);
+                       }
+                       while (m_bounds.y < 0)
+                       {
+                               m_bounds = Rect(m_bounds.x, m_bounds.y + 1, m_bounds.w, m_bounds.h);
+                               m_current_quadtree_node = m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, 0, -1, &m_document);
+                       }
                }
 
+               // Recurse into a node if we are completely within it. (If we're okay with having an invalid frame or two, we can remove this.)
                if (ContainedInQuadChild(m_bounds, QTC_TOP_LEFT))
                {
                        if (m_document.GetQuadTree().nodes[m_current_quadtree_node].top_left == QUADTREE_EMPTY)
@@ -288,6 +322,21 @@ void View::Render(int width, int height)
                        m_bounds = TransformToQuadChild(m_bounds, QTC_BOTTOM_RIGHT);
                        m_current_quadtree_node = m_document.GetQuadTree().nodes[m_current_quadtree_node].bottom_right;
                }
+
+               // Otherwise, we'll arbitrarily select the bottom-right.
+               // TODO: Perhaps select based on greatest area?
+               while (m_bounds.w < 0.5 || m_bounds.h < 0.5)
+               {
+                       if (m_document.GetQuadTree().nodes[m_current_quadtree_node].bottom_right == QUADTREE_EMPTY)
+                       {
+                               // We want to reparent into a child node, but none exist. Get the document to create one.
+                               m_document.GenQuadChild(m_current_quadtree_node, QTC_BOTTOM_RIGHT);
+                               m_render_dirty = true;
+                       }
+                       m_bounds = TransformToQuadChild(m_bounds, QTC_BOTTOM_RIGHT);
+                       m_current_quadtree_node = m_document.GetQuadTree().nodes[m_current_quadtree_node].bottom_right;
+               }
+               g_profiler.EndZone();
        }
 
        m_screen.DebugFontPrintF("Current View QuadTree");
@@ -299,6 +348,12 @@ void View::Render(int width, int height)
                overlay = m_document.GetQuadTree().nodes[overlay].next_overlay;
        }
        m_screen.DebugFontPrintF("\n");
+       m_screen.DebugFontPrintF("Left: %d, Right: %d, Up: %d, Down: %d\n",
+                       m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, -1, 0, 0),
+                       m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, 1, 0, 0),
+                       m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, 0, -1, 0),
+                       m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, 0, 1, 0));
+
 
        Rect view_top_bounds = m_bounds;
        QuadTreeIndex tmp = m_current_quadtree_node;
@@ -327,6 +382,12 @@ void View::Render(int width, int height)
 #ifdef QUADTREE_DISABLED
        RenderRange(width, height, 0, m_document.ObjectCount());
 #else
+       // Make sure we update the gpu buffers properly.
+       if (m_document.m_document_dirty)
+       {
+               m_render_dirty = m_buffer_dirty = true;
+               m_document.m_document_dirty = false;
+       }
        RenderQuadtreeNode(width, height, m_current_quadtree_node, m_quadtree_max_depth);
 #endif
        if (!m_use_gpu_rendering)
@@ -341,7 +402,8 @@ void View::Render(int width, int height)
        glPopDebugGroup();
        
 #ifndef CONTROLPANEL_DISABLED
-       ControlPanel::Update();
+       // The powers that be suggest that this may be causing of the segfaults.
+       //ControlPanel::Update();
 #endif //CONTROLPANEL_DISABLED
        //Debug("Completed Render");
        
@@ -353,71 +415,39 @@ void View::RenderQuadtreeNode(int width, int height, QuadTreeIndex node, int rem
        Rect old_bounds = m_bounds;
        if (node == QUADTREE_EMPTY) return;
        if (!remaining_depth) return;
-       //Debug("Rendering QT node %d, (objs: %d -- %d)\n", node, m_document.GetQuadTree().nodes[node].object_begin, m_document.GetQuadTree().nodes[node].object_end);
        m_bounds_dirty = true;
        QuadTreeIndex overlay = node;
        while(overlay != -1)
        {
+               //Debug("Rendering QT node %d, (overlay %d, objs: %d -- %d)\n", node, overlay, m_document.GetQuadTree().nodes[overlay].object_begin, m_document.GetQuadTree().nodes[overlay].object_end);
+               if (m_document.GetQuadTree().nodes[overlay].render_dirty)
+                       m_buffer_dirty = m_render_dirty = true;
                RenderRange(width, height, m_document.GetQuadTree().nodes[overlay].object_begin, m_document.GetQuadTree().nodes[overlay].object_end);
+               const_cast<bool&>(m_document.GetQuadTree().nodes[overlay].render_dirty) = false;
                overlay = m_document.GetQuadTree().nodes[overlay].next_overlay;
        }
 
-       if (m_bounds.Intersects(Rect(-1,-1,1,1)))
+       if (m_bounds.Intersects(Rect(1,1,1,1)))
        {
                m_bounds = Rect(m_bounds.x - 1, m_bounds.y - 1, m_bounds.w, m_bounds.h);
                m_bounds_dirty = true;
-               RenderQuadtreeNode(width, height, m_document.GetQuadTree().GetNeighbour(node, -1, -1, &m_document), remaining_depth - 1);
+               RenderQuadtreeNode(width, height, m_document.GetQuadTree().GetNeighbour(node, 1, 1, &m_document), remaining_depth - 1);
        }
        m_bounds = old_bounds;
-       if (m_bounds.Intersects(Rect(-1,0,1,1)))
+       if (m_bounds.Intersects(Rect(1,0,1,1)))
        {
                m_bounds = Rect(m_bounds.x - 1, m_bounds.y, m_bounds.w, m_bounds.h);
                m_bounds_dirty = true;
-               RenderQuadtreeNode(width, height, m_document.GetQuadTree().GetNeighbour(node, -1, 0, &m_document), remaining_depth - 1);
-       }
-       m_bounds = old_bounds;
-       if (m_bounds.Intersects(Rect(-1,1,1,1)))
-       {
-               m_bounds = Rect(m_bounds.x - 1, m_bounds.y + 1, m_bounds.w, m_bounds.h);
-               m_bounds_dirty = true;
-               RenderQuadtreeNode(width, height, m_document.GetQuadTree().GetNeighbour(node, -1, 1, &m_document), remaining_depth - 1);
-       }
-       m_bounds = old_bounds;
-       if (m_bounds.Intersects(Rect(0,-1,1,1)))
-       {
-               m_bounds = Rect(m_bounds.x, m_bounds.y - 1, m_bounds.w, m_bounds.h);
-               m_bounds_dirty = true;
-               RenderQuadtreeNode(width, height, m_document.GetQuadTree().GetNeighbour(node, 0, -1, &m_document), remaining_depth - 1);
+               RenderQuadtreeNode(width, height, m_document.GetQuadTree().GetNeighbour(node, 1, 0, &m_document), remaining_depth - 1);
        }
        m_bounds = old_bounds;
        if (m_bounds.Intersects(Rect(0,1,1,1)))
        {
-               m_bounds = Rect(m_bounds.x, m_bounds.y + 1, m_bounds.w, m_bounds.h);
+               m_bounds = Rect(m_bounds.x, m_bounds.y - 1, m_bounds.w, m_bounds.h);
                m_bounds_dirty = true;
                RenderQuadtreeNode(width, height, m_document.GetQuadTree().GetNeighbour(node, 0, 1, &m_document), remaining_depth - 1);
        }
        m_bounds = old_bounds;
-       if (m_bounds.Intersects(Rect(1,-1,1,1)))
-       {
-               m_bounds = Rect(m_bounds.x + 1, m_bounds.y - 1, m_bounds.w, m_bounds.h);
-               m_bounds_dirty = true;
-               RenderQuadtreeNode(width, height, m_document.GetQuadTree().GetNeighbour(node, 1, -1, &m_document), remaining_depth - 1);
-       }
-       m_bounds = old_bounds;
-       if (m_bounds.Intersects(Rect(1,0,1,1)))
-       {
-               m_bounds = Rect(m_bounds.x + 1, m_bounds.y, m_bounds.w, m_bounds.h);
-               m_bounds_dirty = true;
-               RenderQuadtreeNode(width, height, m_document.GetQuadTree().GetNeighbour(node, 1, 0, &m_document), remaining_depth - 1);
-       }
-       m_bounds = old_bounds;
-       if (m_bounds.Intersects(Rect(1,1,1,1)))
-       {
-               m_bounds = Rect(m_bounds.x + 1, m_bounds.y + 1, m_bounds.w, m_bounds.h);
-               m_bounds_dirty = true;
-               RenderQuadtreeNode(width, height, m_document.GetQuadTree().GetNeighbour(node, 1, 1, &m_document), remaining_depth - 1);
-       }
-       m_bounds = old_bounds;
        m_bounds_dirty = true;
 
 #if 0
@@ -441,40 +471,49 @@ void View::RenderQuadtreeNode(int width, int height, QuadTreeIndex node, int rem
 
 void View::RenderRange(int width, int height, unsigned first_obj, unsigned last_obj)
 {
+       // We don't want to render an empty range,
+       // so don't waste time setting up everything.
+       if (first_obj == last_obj) return;
+       PROFILE_SCOPE("View::RenderRange");
        glPushDebugGroup(GL_DEBUG_SOURCE_APPLICATION, 43, -1, "View::RenderRange()");
+
+       g_profiler.AddCounter("Objects Rendered", last_obj-first_obj);
+
        if (m_render_dirty) // document has changed
                PrepareRender();
 
+
        if (m_buffer_dirty || m_bounds_dirty || !m_lazy_rendering) // object bounds have changed
        {
                if (m_use_gpu_rendering)
                        UpdateObjBoundsVBO(first_obj, last_obj);
        }
 
-       if (m_use_gpu_transform)
-       {
-               #ifdef TRANSFORM_OBJECTS_NOT_VIEW
-                       //Debug("Transform objects, not view");
-                               GLfloat glbounds[] = {0.0f, 0.0f, 1.0f, 1.0f,
-                                       0.0f, 0.0f, float(width), float(height)};
-               #else
-               GLfloat glbounds[] = {static_cast<GLfloat>(Float(m_bounds.x)), static_cast<GLfloat>(Float(m_bounds.y)), static_cast<GLfloat>(Float(m_bounds.w)), static_cast<GLfloat>(Float(m_bounds.h)),
-                                       0.0, 0.0, static_cast<GLfloat>(width), static_cast<GLfloat>(height)};
-               #endif
-               m_bounds_ubo.Upload(sizeof(float)*8, glbounds);
-       }
-       else
-       {
-               GLfloat glbounds[] = {0.0f, 0.0f, 1.0f, 1.0f,
-                                       0.0f, 0.0f, float(width), float(height)};
-               m_bounds_ubo.Upload(sizeof(float)*8, glbounds);
-       }
-       m_bounds_dirty = false;
-
 
        // Render using GPU
        if (m_use_gpu_rendering) 
        {
+
+               if (m_use_gpu_transform)
+               {
+                       #ifdef TRANSFORM_OBJECTS_NOT_VIEW
+                               //Debug("Transform objects, not view");
+                                       GLfloat glbounds[] = {0.0f, 0.0f, 1.0f, 1.0f,
+                                               0.0f, 0.0f, float(width), float(height)};
+                       #else
+                       GLfloat glbounds[] = {static_cast<GLfloat>(Float(m_bounds.x)), static_cast<GLfloat>(Float(m_bounds.y)), static_cast<GLfloat>(Float(m_bounds.w)), static_cast<GLfloat>(Float(m_bounds.h)),
+                                               0.0, 0.0, static_cast<GLfloat>(width), static_cast<GLfloat>(height)};
+                       #endif
+                       m_bounds_ubo.Upload(sizeof(float)*8, glbounds);
+               }
+               else
+               {
+                       GLfloat glbounds[] = {0.0f, 0.0f, 1.0f, 1.0f,
+                                               0.0f, 0.0f, float(width), float(height)};
+                       m_bounds_ubo.Upload(sizeof(float)*8, glbounds);
+               }
+               m_bounds_dirty = false;
+
                if (m_colour.a < 1.0f)
                {
                        glEnable(GL_BLEND);
@@ -509,6 +548,12 @@ void View::RenderRange(int width, int height, unsigned first_obj, unsigned last_
 
 void View::UpdateObjBoundsVBO(unsigned first_obj, unsigned last_obj)
 {
+       PROFILE_SCOPE("View::UpdateObjBoundsVBO");
+       if (m_query_gpu_bounds_on_next_frame != NULL)
+       {
+               fprintf(m_query_gpu_bounds_on_next_frame,"# View: %s\t%s\t%s\t%s\n", Str(m_bounds.x).c_str(), Str(m_bounds.y).c_str(), Str(m_bounds.w).c_str(), Str(m_bounds.h).c_str());
+       }       
+       
        //m_objbounds_vbo.Invalidate();
        m_objbounds_vbo.SetType(GraphicsBuffer::BufferTypeVertex);
        m_objbounds_vbo.SetName("Object Bounds VBO");
@@ -540,12 +585,17 @@ void View::UpdateObjBoundsVBO(unsigned first_obj, unsigned last_obj)
                        obj_bounds = TransformToViewCoords(m_document.m_objects.bounds[id]);
                }
                GPUObjBounds gpu_bounds = {
-                       (float)Float(obj_bounds.x),
-                       (float)Float(obj_bounds.y),
-                       (float)Float(obj_bounds.x + obj_bounds.w),
-                       (float)Float(obj_bounds.y + obj_bounds.h)
+                       Float(obj_bounds.x),
+                       Float(obj_bounds.y),
+                       Float(obj_bounds.x + obj_bounds.w),
+                       Float(obj_bounds.y + obj_bounds.h)
                };
 
+               if (m_query_gpu_bounds_on_next_frame != NULL)
+               {       
+                       fprintf(m_query_gpu_bounds_on_next_frame,"%d\t%f\t%f\t%f\t%f\n", id, Float(obj_bounds.x), Float(obj_bounds.y), Float(obj_bounds.w), Float(obj_bounds.h));
+               }
+               
                obj_bounds_builder.Add(gpu_bounds);
        }
        #else
@@ -553,13 +603,16 @@ void View::UpdateObjBoundsVBO(unsigned first_obj, unsigned last_obj)
        {
                Path & path = m_document.m_objects.paths[i];
                Rect & pbounds = path.GetBounds(m_document.m_objects); // Not very efficient...
+               //TODO: Add clipping here
+               //if (!pbounds.Intersects(Rect(0,0,1,1)) || pbounds.w < Real(1)/Real(800))
+               //      continue;
+
                for (unsigned id = path.m_start; id <= path.m_end; ++id)
                {
                        if (id < first_obj || id >= last_obj)
                                continue;
                                
                        Rect obj_bounds = m_document.m_objects.bounds[id];
-
                        obj_bounds.x *= pbounds.w;
                        obj_bounds.x += pbounds.x;
                        obj_bounds.y *= pbounds.h;
@@ -570,23 +623,34 @@ void View::UpdateObjBoundsVBO(unsigned first_obj, unsigned last_obj)
                        if (!m_use_gpu_transform)
                                obj_bounds = TransformToViewCoords(obj_bounds);
                        GPUObjBounds gpu_bounds = {
-                               Float(obj_bounds.x),
-                               Float(obj_bounds.y),
-                               Float(obj_bounds.x + obj_bounds.w),
-                               Float(obj_bounds.y + obj_bounds.h)
+                               ClampFloat(obj_bounds.x),
+                               ClampFloat(obj_bounds.y),
+                               ClampFloat(obj_bounds.x + obj_bounds.w),
+                               ClampFloat(obj_bounds.y + obj_bounds.h)
                        };
                        obj_bounds_builder.Add(gpu_bounds);
                        //Debug("Path %d %s -> %s via %s", id, m_document.m_objects.bounds[id].Str().c_str(), obj_bounds.Str().c_str(), pbounds.Str().c_str()); 
+                       
+                       if (m_query_gpu_bounds_on_next_frame != NULL)
+                       {
+                               fprintf(m_query_gpu_bounds_on_next_frame,"%d\t%f\t%f\t%f\t%f\n", id, ClampFloat(obj_bounds.x), ClampFloat(obj_bounds.y), ClampFloat(obj_bounds.w), ClampFloat(obj_bounds.h));
+                       }
                }
                GPUObjBounds p_gpu_bounds = {
-                               Float(pbounds.x),
-                               Float(pbounds.y),
-                               Float(pbounds.x + pbounds.w),
-                               Float(pbounds.y + pbounds.h)
+                               ClampFloat(pbounds.x),
+                               ClampFloat(pbounds.y),
+                               ClampFloat(pbounds.x + pbounds.w),
+                               ClampFloat(pbounds.y + pbounds.h)
                };              
                obj_bounds_builder.Add(p_gpu_bounds);
        }
        #endif
+       if (m_query_gpu_bounds_on_next_frame != NULL)
+       {
+               if (m_query_gpu_bounds_on_next_frame != stdout && m_query_gpu_bounds_on_next_frame != stderr)
+                       fclose(m_query_gpu_bounds_on_next_frame);
+               m_query_gpu_bounds_on_next_frame = NULL;
+       }
        m_objbounds_vbo.UnMap();
 }
 /**
@@ -596,6 +660,7 @@ void View::UpdateObjBoundsVBO(unsigned first_obj, unsigned last_obj)
  */
 void View::PrepareRender()
 {
+       PROFILE_SCOPE("View::PrepareRender()");
        Debug("Recreate buffers with %u objects", m_document.ObjectCount());
        // Prepare bounds vbo
        if (UsingGPURendering())
@@ -657,3 +722,14 @@ void View::SaveGPUBMP(const char * filename)
        m_screen.ScreenShot(filename);
        SetGPURendering(prev);  
 }
+
+void View::QueryGPUBounds(const char * filename, const char * mode)
+{
+       m_query_gpu_bounds_on_next_frame = fopen(filename, mode); 
+       Debug("File: %s", filename);
+       if (m_query_gpu_bounds_on_next_frame == NULL)
+               Error("Couldn't open file \"%s\" : %s", filename, strerror(errno));
+       ForceBoundsDirty(); 
+       ForceBufferDirty(); 
+       ForceRenderDirty();
+}

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