src/view.cpp

   1 #include "view.h"
   2 #include "bufferbuilder.h"
   3 #include "screen.h"
   4 #include "profiler.h"
   5 #include "gl_core44.h"
   6
   7 #ifndef CONTROLPANEL_DISABLED
   8         #include "controlpanel.h"
   9 #endif //CONTROLPANEL_DISABLED
  10
  11
  12 #ifdef TRANSFORM_BEZIERS_TO_PATH
  13         #ifndef TRANSFORM_OBJECTS_NOT_VIEW
  14         //#error Cannot TRANSFORM_BEZIERS_TO_PATH _without_ TRANSFORM_OBJECTS_NOT_VIEW
  15         #endif
  16 #endif
  17
  18 using namespace IPDF;
  19 using namespace std;
  20
  21 /**
  22  * Constructs a view
  23  * Allocates memory for ObjectRenderers
  24  * @param document - The document to associate the View with
  25  * @param bounds - Initial bounds of the View
  26  * @param colour - Colour to use for rendering this view. TODO: Make sure this actually works, or just remove it
  27  */
  28 View::View(Document & document, Screen & screen, const VRect & bounds, const Colour & colour)
  29         : m_use_gpu_transform(false), m_use_gpu_rendering(USE_GPU_RENDERING), m_bounds_dirty(true), m_buffer_dirty(true),
  30                 m_render_dirty(true), m_document(document), m_screen(screen), m_cached_display(), m_bounds(bounds), m_colour(colour), m_bounds_ubo(),
  31                 m_objbounds_vbo(), m_object_renderers(NUMBER_OF_OBJECT_TYPES), m_cpu_rendering_pixels(NULL),
  32                 m_perform_shading(USE_SHADING), m_show_bezier_bounds(false), m_show_bezier_type(false),
  33                 m_show_fill_points(false), m_show_fill_bounds(false), m_lazy_rendering(true),
  34                 m_query_gpu_bounds_on_next_frame(NULL)
  35 {
  36         Debug("View Created - Bounds => {%s}", m_bounds.Str().c_str());
  37
  38         screen.SetView(this); // oh dear...
  39
  40
  41
  42         // Create ObjectRenderers - new's match delete's in View::~View
  43         //TODO: Don't forget to put new renderers here or things will be segfaultastic
  44         if (screen.Valid())
  45         {
  46                 m_object_renderers[RECT_FILLED] = new RectFilledRenderer();
  47                 m_object_renderers[RECT_OUTLINE] = new RectOutlineRenderer();
  48                 m_object_renderers[CIRCLE_FILLED] = new CircleFilledRenderer();
  49                 m_object_renderers[BEZIER] = new BezierRenderer();
  50                 m_object_renderers[PATH] = new PathRenderer();
  51         }
  52         else
  53         {
  54                 for (int i = RECT_FILLED; i <= PATH; ++i)
  55                         m_object_renderers[i] = new FakeRenderer();
  56         }
  57
  58         // To add rendering for a new type of object;
  59         // 1. Add enum to ObjectType in ipdf.h
  60         // 2. Implement class inheriting from ObjectRenderer using that type in objectrenderer.h and objectrenderer.cpp
  61         // 3. Add it here
  62         // 4. Profit
  63
  64
  65 #ifndef QUADTREE_DISABLED
  66         m_quadtree_max_depth = 2;
  67         m_current_quadtree_node = document.GetQuadTree().root_id;
  68 #endif
  69 }
  70
  71 /**
  72  * Destroy a view
  73  * Frees memory used by ObjectRenderers
  74  */
  75 View::~View()
  76 {
  77         for (unsigned i = 0; i < m_object_renderers.size(); ++i)
  78         {
  79                 delete m_object_renderers[i]; // delete's match new's in constructor
  80         }
  81         m_object_renderers.clear();
  82         delete [] m_cpu_rendering_pixels;
  83 }
  84
  85 /**
  86  * Translate the view
  87  * @param x, y - Amount to translate
  88  */
  89 void View::Translate(Real x, Real y)
  90 {
  91         PROFILE_SCOPE("View::Translate");
  92         if (!m_use_gpu_transform)
  93                 m_buffer_dirty = true;
  94         m_bounds_dirty = true;
  95         #ifdef TRANSFORM_OBJECTS_NOT_VIEW
  96         ObjectType type = NUMBER_OF_OBJECT_TYPES;
  97                 #ifdef TRANSFORM_BEZIERS_TO_PATH
  98                         type = PATH;
  99                 #endif
 100         m_document.TranslateObjects(-x, -y, type);
 101         #endif
 102         m_bounds.x += m_bounds.w*VReal(x);
 103         m_bounds.y += m_bounds.h*VReal(y);
 104         //Debug("View Bounds => %s", m_bounds.Str().c_str());
 105
 106
 107 }
 108
 109 /**
 110  * Set View bounds
 111  * @param bounds - New bounds
 112  */
 113 void View::SetBounds(const Rect & bounds)
 114 {
 115         #ifdef TRANSFORM_OBJECTS_NOT_VIEW
 116         ObjectType type = NUMBER_OF_OBJECT_TYPES;
 117         #ifdef TRANSFORM_BEZIERS_TO_PATH
 118                 type = PATH;
 119         #endif
 120         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};
 121         m_document.TransformObjectBounds(transform, type);
 122         #endif
 123         m_bounds.x = bounds.x;
 124         m_bounds.y = bounds.y;
 125         m_bounds.w = bounds.w;
 126         m_bounds.h = bounds.h;
 127         if (!m_use_gpu_transform)
 128                 m_buffer_dirty = true;
 129         m_bounds_dirty = true;
 130 }
 131
 132 /**
 133  * Scale the View at a point
 134  * @param x, y - Coordinates to scale at (eg: Mouse cursor position)
 135  * @param scale_amount - Amount to scale by
 136  */
 137 void View::ScaleAroundPoint(Real x, Real y, Real scale_amount)
 138 {
 139         PROFILE_SCOPE("View::ScaleAroundPoint");
 140         // (x0, y0, w, h) -> (x*w - (x*w - x0)*s, y*h - (y*h - y0)*s, w*s, h*s)
 141         // x and y are coordinates in the window
 142         // Convert to local coords.
 143         if (!m_use_gpu_transform)
 144                 m_buffer_dirty = true;
 145         m_bounds_dirty = true;
 146
 147
 148         #ifdef TRANSFORM_OBJECTS_NOT_VIEW
 149         ObjectType type = NUMBER_OF_OBJECT_TYPES;
 150         #ifdef TRANSFORM_BEZIERS_TO_PATH
 151                 type = PATH;
 152         #endif
 153         m_document.ScaleObjectsAboutPoint(x, y, scale_amount, type);
 154         #endif
 155         VReal vx = m_bounds.w * VReal(x);
 156         VReal vy = m_bounds.h * VReal(y);
 157         vx += m_bounds.x;
 158         vy += m_bounds.y;
 159
 160         VReal top = vy - m_bounds.y;
 161         VReal left = vx - m_bounds.x;
 162
 163         top *= scale_amount;
 164         left *= scale_amount;
 165
 166         m_bounds.x = vx - left;
 167         m_bounds.y = vy - top;
 168         m_bounds.w *= scale_amount;
 169         m_bounds.h *= scale_amount;
 170         if (m_bounds.w == VReal(0))
 171         {
 172                 Debug("Scaled to zero!!!");
 173         }
 174         //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());
 175
 176
 177 }
 178
 179 /**
 180  * Transform a point in the document to a point relative to the top left corner of the view
 181  * This is the CPU coordinate transform code; used only if the CPU is doing coordinate transforms
 182  * @param inp - Input Rect {x,y,w,h} in the document
 183  * @returns output Rect {x,y,w,h} in the View
 184  */
 185 Rect View::TransformToViewCoords(const Rect& inp) const
 186 {
 187         #ifdef TRANSFORM_OBJECTS_NOT_VIEW
 188                 return inp;
 189         #endif
 190         return TransformRectCoordinates(m_bounds.Convert<Real>(), inp);
 191 }
 192
 193 /**
 194  * Render the view
 195  * Updates FrameBuffer if the document, object bounds, or view bounds have changed, then Blits it
 196  * Otherwise just Blits the cached FrameBuffer
 197  * @param width - Width of View to render
 198  * @param height - Height of View to render
 199  */
 200 void View::Render(int width, int height)
 201 {
 202         PROFILE_SCOPE("View::Render()");
 203         if (!m_screen.Valid()) return;
 204         glPushDebugGroup(GL_DEBUG_SOURCE_APPLICATION,42,-1, "Beginning View::Render()");
 205         // View dimensions have changed (ie: Window was resized)
 206         int prev_width = m_cached_display.GetWidth();
 207         int prev_height = m_cached_display.GetHeight();
 208         if (width != prev_width || height != prev_height)
 209         {
 210                 m_cached_display.Create(width, height);
 211                 m_bounds_dirty = true;
 212         }
 213
 214         // View bounds have not changed; blit the FrameBuffer as it is
 215         if (!m_bounds_dirty && m_lazy_rendering)
 216         {
 217                 m_cached_display.UnBind();
 218                 m_cached_display.Blit();
 219                 glPopDebugGroup();
 220                 return;
 221         }
 222         m_cached_display.Bind(); //NOTE: This is redundant; Clear already calls Bind
 223         m_cached_display.Clear();
 224
 225 #ifndef QUADTREE_DISABLED
 226         // I'm going to write this out in comments, so hopefully then I'll understand it. :/
 227         //
 228         // This code looks at the current bounds and tries to work out how they need to change
 229         // to keep the view looking at the correct quadtree node.
 230         //
 231         // The idea is that the width/height of the view bounds are always 0.5<=wh<=1.0. We then always
 232         // try to keep the bottom-right corner of the node on-screen, changing nodes to suit. Why bottom-right,
 233         // you may ask. It's an excellent question, with a dubious, hand-wavey answer: because we're manipulating
 234         // the bounds, it was easier to do it that way. (The top-left corner of the bounds are within the main
 235         // quadtree node).
 236         if (m_bounds_dirty || !m_lazy_rendering)
 237         {
 238                 g_profiler.BeginZone("View::Render -- Quadtree view bounds management");
 239                 // If we're too far zoomed out, become the parent of the current node.
 240                 while ( m_bounds.w > 1.0 || m_bounds.h > 1.0)
 241                 {
 242                         // If a parent node exists, we'll become it.
 243                         //TODO: Generate a new parent node if none exists, and work out when to change child_type
 244                         // away from QTC_UNKNOWN
 245                         if (m_document.GetQuadTree().nodes[m_current_quadtree_node].parent != QUADTREE_EMPTY)
 246                         {
 247                                 m_bounds = TransformFromQuadChild(m_bounds, m_document.GetQuadTree().nodes[m_current_quadtree_node].child_type);
 248                                 m_current_quadtree_node = m_document.GetQuadTree().nodes[m_current_quadtree_node].parent;
 249                         }
 250                         else break;
 251                 }
 252
 253                 // If we have a parent... (This prevents some crashes, but should disappear.)
 254                 if (m_document.GetQuadTree().nodes[m_current_quadtree_node].parent != QUADTREE_EMPTY)
 255                 {
 256                         // If the current node is off the left-hand side of the screen...
 257                         while (m_bounds.x > 1)
 258                         {
 259                                 //... the current node becomes the node to its right.
 260                                 m_bounds = Rect(m_bounds.x - 1, m_bounds.y, m_bounds.w, m_bounds.h);
 261                                 m_current_quadtree_node = m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, 1, 0, &m_document);
 262                         }
 263                         while (m_bounds.y > 1)
 264                         {
 265                                 m_bounds = Rect(m_bounds.x, m_bounds.y - 1, m_bounds.w, m_bounds.h);
 266                                 m_current_quadtree_node = m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, 0, 1, &m_document);
 267                         }
 268                         while (m_bounds.x < 0)
 269                         {
 270                                 m_bounds = Rect(m_bounds.x + 1, m_bounds.y, m_bounds.w, m_bounds.h);
 271                                 m_current_quadtree_node = m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, -1, 0, &m_document);
 272                         }
 273                         while (m_bounds.y < 0)
 274                         {
 275                                 m_bounds = Rect(m_bounds.x, m_bounds.y + 1, m_bounds.w, m_bounds.h);
 276                                 m_current_quadtree_node = m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, 0, -1, &m_document);
 277                         }
 278                 }
 279
 280                 // 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.)
 281                 if (ContainedInQuadChild(m_bounds, QTC_TOP_LEFT))
 282                 {
 283                         if (m_document.GetQuadTree().nodes[m_current_quadtree_node].top_left == QUADTREE_EMPTY)
 284                         {
 285                                 // We want to reparent into a child node, but none exist. Get the document to create one.
 286                                 m_document.GenQuadChild(m_current_quadtree_node, QTC_TOP_LEFT);
 287                                 m_render_dirty = true;
 288                         }
 289                         m_bounds = TransformToQuadChild(m_bounds, QTC_TOP_LEFT);
 290                         m_current_quadtree_node = m_document.GetQuadTree().nodes[m_current_quadtree_node].top_left;
 291                 }
 292                 if (ContainedInQuadChild(m_bounds, QTC_TOP_RIGHT))
 293                 {
 294                         if (m_document.GetQuadTree().nodes[m_current_quadtree_node].top_right == QUADTREE_EMPTY)
 295                         {
 296                                 // We want to reparent into a child node, but none exist. Get the document to create one.
 297                                 m_document.GenQuadChild(m_current_quadtree_node, QTC_TOP_RIGHT);
 298                                 m_render_dirty = true;
 299                         }
 300                         m_bounds = TransformToQuadChild(m_bounds, QTC_TOP_RIGHT);
 301                         m_current_quadtree_node = m_document.GetQuadTree().nodes[m_current_quadtree_node].top_right;
 302                 }
 303                 if (ContainedInQuadChild(m_bounds, QTC_BOTTOM_LEFT))
 304                 {
 305                         if (m_document.GetQuadTree().nodes[m_current_quadtree_node].bottom_left == QUADTREE_EMPTY)
 306                         {
 307                                 // We want to reparent into a child node, but none exist. Get the document to create one.
 308                                 m_document.GenQuadChild(m_current_quadtree_node, QTC_BOTTOM_LEFT);
 309                                 m_render_dirty = true;
 310                         }
 311                         m_bounds = TransformToQuadChild(m_bounds, QTC_BOTTOM_LEFT);
 312                         m_current_quadtree_node = m_document.GetQuadTree().nodes[m_current_quadtree_node].bottom_left;
 313                 }
 314                 if (ContainedInQuadChild(m_bounds, QTC_BOTTOM_RIGHT))
 315                 {
 316                         if (m_document.GetQuadTree().nodes[m_current_quadtree_node].bottom_right == QUADTREE_EMPTY)
 317                         {
 318                                 // We want to reparent into a child node, but none exist. Get the document to create one.
 319                                 m_document.GenQuadChild(m_current_quadtree_node, QTC_BOTTOM_RIGHT);
 320                                 m_render_dirty = true;
 321                         }
 322                         m_bounds = TransformToQuadChild(m_bounds, QTC_BOTTOM_RIGHT);
 323                         m_current_quadtree_node = m_document.GetQuadTree().nodes[m_current_quadtree_node].bottom_right;
 324                 }
 325
 326                 // Otherwise, we'll arbitrarily select the bottom-right.
 327                 // TODO: Perhaps select based on greatest area?
 328                 while (m_bounds.w < 0.5 || m_bounds.h < 0.5)
 329                 {
 330                         if (m_document.GetQuadTree().nodes[m_current_quadtree_node].bottom_right == QUADTREE_EMPTY)
 331                         {
 332                                 // We want to reparent into a child node, but none exist. Get the document to create one.
 333                                 m_document.GenQuadChild(m_current_quadtree_node, QTC_BOTTOM_RIGHT);
 334                                 m_render_dirty = true;
 335                         }
 336                         m_bounds = TransformToQuadChild(m_bounds, QTC_BOTTOM_RIGHT);
 337                         m_current_quadtree_node = m_document.GetQuadTree().nodes[m_current_quadtree_node].bottom_right;
 338                 }
 339                 g_profiler.EndZone();
 340         }
 341
 342         m_screen.DebugFontPrintF("Current View QuadTree");
 343         QuadTreeIndex overlay = m_current_quadtree_node;
 344         while (overlay != -1)
 345         {
 346                 m_screen.DebugFontPrintF(" Node: %d (objs: %d -> %d)", overlay, m_document.GetQuadTree().nodes[overlay].object_begin,
 347                                         m_document.GetQuadTree().nodes[overlay].object_end);
 348                 overlay = m_document.GetQuadTree().nodes[overlay].next_overlay;
 349         }
 350         m_screen.DebugFontPrintF("\n");
 351         m_screen.DebugFontPrintF("Left: %d, Right: %d, Up: %d, Down: %d\n",
 352                         m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, -1, 0, 0),
 353                         m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, 1, 0, 0),
 354                         m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, 0, -1, 0),
 355                         m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, 0, 1, 0));
 356
 357
 358         Rect view_top_bounds = m_bounds;
 359         QuadTreeIndex tmp = m_current_quadtree_node;
 360         while (tmp != -1)
 361         {
 362                 view_top_bounds = TransformFromQuadChild(view_top_bounds, m_document.GetQuadTree().nodes[tmp].child_type);
 363                 tmp = m_document.GetQuadTree().nodes[tmp].parent;
 364         }
 365         m_screen.DebugFontPrintF("Equivalent View Bounds: %s\n", view_top_bounds.Str().c_str());
 366 #endif
 367
 368         if (!m_use_gpu_rendering)
 369         {
 370                 // Dynamically resize CPU rendering target pixels if needed
 371                 if (m_cpu_rendering_pixels == NULL || width*height > prev_width*prev_height)
 372                 {
 373                         delete [] m_cpu_rendering_pixels;
 374                         m_cpu_rendering_pixels = new uint8_t[width*height*4];
 375                         if (m_cpu_rendering_pixels == NULL)
 376                                 Fatal("Could not allocate %d*%d*4 = %d bytes for cpu rendered pixels", width, height, width*height*4);
 377                 }
 378                 // Clear CPU rendering pixels
 379                 for (int i = 0; i < width*height*4; ++i)
 380                         m_cpu_rendering_pixels[i] = 255;
 381         }
 382 #ifdef QUADTREE_DISABLED
 383         RenderRange(width, height, 0, m_document.ObjectCount());
 384 #else
 385         // Make sure we update the gpu buffers properly.
 386         if (m_document.m_document_dirty)
 387         {
 388                 m_render_dirty = m_buffer_dirty = true;
 389                 m_document.m_document_dirty = false;
 390         }
 391         RenderQuadtreeNode(width, height, m_current_quadtree_node, m_quadtree_max_depth);
 392 #endif
 393         if (!m_use_gpu_rendering)
 394         {
 395                 m_screen.RenderPixels(0,0,width, height, m_cpu_rendering_pixels); //TODO: Make this work :(
 396                 // Debug for great victory (do something similar for GPU and compare?)
 397                 //ObjectRenderer::SaveBMP({m_cpu_rendering_pixels, width, height}, "cpu_rendering_last_frame.bmp");
 398         }
 399         m_cached_display.UnBind(); // resets render target to the screen
 400         m_cached_display.Blit(); // blit FrameBuffer to screen
 401         m_buffer_dirty = false;
 402         glPopDebugGroup();
 403
 404 #ifndef CONTROLPANEL_DISABLED
 405         // The powers that be suggest that this may be causing of the segfaults.
 406         //ControlPanel::Update();
 407 #endif //CONTROLPANEL_DISABLED
 408         //Debug("Completed Render");
 409
 410 }
 411
 412 #ifndef QUADTREE_DISABLED
 413 void View::RenderQuadtreeNode(int width, int height, QuadTreeIndex node, int remaining_depth)
 414 {
 415         Rect old_bounds = m_bounds;
 416         if (node == QUADTREE_EMPTY) return;
 417         if (!remaining_depth) return;
 418         m_bounds_dirty = true;
 419         QuadTreeIndex overlay = node;
 420         while(overlay != -1)
 421         {
 422                 //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);
 423                 if (m_document.GetQuadTree().nodes[overlay].render_dirty)
 424                         m_buffer_dirty = m_render_dirty = true;
 425                 RenderRange(width, height, m_document.GetQuadTree().nodes[overlay].object_begin, m_document.GetQuadTree().nodes[overlay].object_end);
 426                 const_cast<bool&>(m_document.GetQuadTree().nodes[overlay].render_dirty) = false;
 427                 overlay = m_document.GetQuadTree().nodes[overlay].next_overlay;
 428         }
 429
 430         if (m_bounds.Intersects(Rect(1,1,1,1)))
 431         {
 432                 m_bounds = Rect(m_bounds.x - 1, m_bounds.y - 1, m_bounds.w, m_bounds.h);
 433                 m_bounds_dirty = true;
 434                 RenderQuadtreeNode(width, height, m_document.GetQuadTree().GetNeighbour(node, 1, 1, &m_document), remaining_depth - 1);
 435         }
 436         m_bounds = old_bounds;
 437         if (m_bounds.Intersects(Rect(1,0,1,1)))
 438         {
 439                 m_bounds = Rect(m_bounds.x - 1, m_bounds.y, m_bounds.w, m_bounds.h);
 440                 m_bounds_dirty = true;
 441                 RenderQuadtreeNode(width, height, m_document.GetQuadTree().GetNeighbour(node, 1, 0, &m_document), remaining_depth - 1);
 442         }
 443         m_bounds = old_bounds;
 444         if (m_bounds.Intersects(Rect(0,1,1,1)))
 445         {
 446                 m_bounds = Rect(m_bounds.x, m_bounds.y - 1, m_bounds.w, m_bounds.h);
 447                 m_bounds_dirty = true;
 448                 RenderQuadtreeNode(width, height, m_document.GetQuadTree().GetNeighbour(node, 0, 1, &m_document), remaining_depth - 1);
 449         }
 450         m_bounds = old_bounds;
 451         m_bounds_dirty = true;
 452
 453 #if 0
 454         m_bounds = TransformToQuadChild(old_bounds, QTC_TOP_LEFT);
 455         m_bounds_dirty = true;
 456         RenderQuadtreeNode(width, height, m_document.GetQuadTree().nodes[node].top_left, remaining_depth-1);
 457         m_bounds = TransformToQuadChild(old_bounds, QTC_TOP_RIGHT);
 458         m_bounds_dirty = true;
 459         RenderQuadtreeNode(width, height, m_document.GetQuadTree().nodes[node].top_right, remaining_depth-1);
 460         m_bounds = TransformToQuadChild(old_bounds, QTC_BOTTOM_LEFT);
 461         m_bounds_dirty = true;
 462         RenderQuadtreeNode(width, height, m_document.GetQuadTree().nodes[node].bottom_left, remaining_depth-1);
 463         m_bounds = TransformToQuadChild(old_bounds, QTC_BOTTOM_RIGHT);
 464         m_bounds_dirty = true;
 465         RenderQuadtreeNode(width, height, m_document.GetQuadTree().nodes[node].bottom_right, remaining_depth-1);
 466         m_bounds = old_bounds;
 467         m_bounds_dirty = true;
 468 #endif
 469 }
 470 #endif
 471
 472 void View::RenderRange(int width, int height, unsigned first_obj, unsigned last_obj)
 473 {
 474         // We don't want to render an empty range,
 475         // so don't waste time setting up everything.
 476         if (first_obj == last_obj) return;
 477         PROFILE_SCOPE("View::RenderRange");
 478         glPushDebugGroup(GL_DEBUG_SOURCE_APPLICATION, 43, -1, "View::RenderRange()");
 479
 480         g_profiler.AddCounter("Objects Rendered", last_obj-first_obj);
 481
 482         if (m_render_dirty) // document has changed
 483                 PrepareRender();
 484
 485
 486         if (m_buffer_dirty || m_bounds_dirty || !m_lazy_rendering) // object bounds have changed
 487         {
 488                 if (m_use_gpu_rendering)
 489                         UpdateObjBoundsVBO(first_obj, last_obj);
 490         }
 491
 492
 493         // Render using GPU
 494         if (m_use_gpu_rendering)
 495         {
 496
 497                 if (m_use_gpu_transform)
 498                 {
 499                         #ifdef TRANSFORM_OBJECTS_NOT_VIEW
 500                                 //Debug("Transform objects, not view");
 501                                         GLfloat glbounds[] = {0.0f, 0.0f, 1.0f, 1.0f,
 502                                                 0.0f, 0.0f, float(width), float(height)};
 503                         #else
 504                         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)),
 505                                                 0.0, 0.0, static_cast<GLfloat>(width), static_cast<GLfloat>(height)};
 506                         #endif
 507                         m_bounds_ubo.Upload(sizeof(float)*8, glbounds);
 508                 }
 509                 else
 510                 {
 511                         GLfloat glbounds[] = {0.0f, 0.0f, 1.0f, 1.0f,
 512                                                 0.0f, 0.0f, float(width), float(height)};
 513                         m_bounds_ubo.Upload(sizeof(float)*8, glbounds);
 514                 }
 515                 m_bounds_dirty = false;
 516
 517                 if (m_colour.a < 1.0f)
 518                 {
 519                         glEnable(GL_BLEND);
 520                         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 521                 }
 522                 m_objbounds_vbo.Bind();
 523                 m_bounds_ubo.Bind();
 524                 glEnableVertexAttribArray(0);
 525                 glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, 0);
 526
 527                 for (unsigned i = 0; i < m_object_renderers.size(); ++i)
 528                 {
 529                         m_object_renderers[i]->RenderUsingGPU(first_obj, last_obj);
 530                 }
 531
 532                 glDisableVertexAttribArray(0);
 533                 if (m_colour.a < 1.0f)
 534                 {
 535                         glDisable(GL_BLEND);
 536                 }
 537         }
 538         else // Rasterise on CPU then blit texture to GPU
 539         {
 540
 541                 for (unsigned i = 0; i < m_object_renderers.size(); ++i)
 542                 {
 543                         m_object_renderers[i]->RenderUsingCPU(m_document.m_objects, *this, {m_cpu_rendering_pixels, width, height}, first_obj, last_obj);
 544                 }
 545         }
 546         glPopDebugGroup();
 547 }
 548
 549 void View::UpdateObjBoundsVBO(unsigned first_obj, unsigned last_obj)
 550 {
 551         PROFILE_SCOPE("View::UpdateObjBoundsVBO");
 552         if (m_query_gpu_bounds_on_next_frame != NULL)
 553         {
 554                 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());
 555         }
 556
 557         //m_objbounds_vbo.Invalidate();
 558         m_objbounds_vbo.SetType(GraphicsBuffer::BufferTypeVertex);
 559         m_objbounds_vbo.SetName("Object Bounds VBO");
 560
 561         #ifndef TRANSFORM_OBJECTS_NOT_VIEW
 562         if (m_use_gpu_transform)
 563         {
 564                 m_objbounds_vbo.SetUsage(GraphicsBuffer::BufferUsageStaticDraw);
 565         }
 566         else
 567         #endif //TRANSFORM_OBJECTS_NOT_VIEW
 568         {
 569                 m_objbounds_vbo.SetUsage(GraphicsBuffer::BufferUsageDynamicCopy);
 570         }
 571         m_objbounds_vbo.Resize(m_document.ObjectCount()*sizeof(GPUObjBounds));
 572
 573         BufferBuilder<GPUObjBounds> obj_bounds_builder(m_objbounds_vbo.MapRange(first_obj*sizeof(GPUObjBounds), (last_obj-first_obj)*sizeof(GPUObjBounds), false, true, true), m_objbounds_vbo.GetSize());
 574
 575         #ifndef TRANSFORM_BEZIERS_TO_PATH
 576         for (unsigned id = first_obj; id < last_obj; ++id)
 577         {
 578                 Rect obj_bounds;
 579                 if (m_use_gpu_transform)
 580                 {
 581                         obj_bounds = m_document.m_objects.bounds[id];
 582                 }
 583                 else
 584                 {
 585                         obj_bounds = TransformToViewCoords(m_document.m_objects.bounds[id]);
 586                 }
 587                 GPUObjBounds gpu_bounds = {
 588                         Float(obj_bounds.x),
 589                         Float(obj_bounds.y),
 590                         Float(obj_bounds.x + obj_bounds.w),
 591                         Float(obj_bounds.y + obj_bounds.h)
 592                 };
 593
 594                 if (m_query_gpu_bounds_on_next_frame != NULL)
 595                 {
 596                         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));
 597                 }
 598
 599                 obj_bounds_builder.Add(gpu_bounds);
 600         }
 601         #else
 602         for (unsigned i = 0; i < m_document.m_objects.paths.size(); ++i)
 603         {
 604                 Path & path = m_document.m_objects.paths[i];
 605                 Rect & pbounds = path.GetBounds(m_document.m_objects); // Not very efficient...
 606                 //TODO: Add clipping here
 607                 //if (!pbounds.Intersects(Rect(0,0,1,1)) || pbounds.w < Real(1)/Real(800))
 608                 //      continue;
 609
 610                 for (unsigned id = path.m_start; id <= path.m_end; ++id)
 611                 {
 612                         if (id < first_obj || id >= last_obj)
 613                                 continue;
 614
 615                         Rect obj_bounds = m_document.m_objects.bounds[id];
 616                         obj_bounds.x *= pbounds.w;
 617                         obj_bounds.x += pbounds.x;
 618                         obj_bounds.y *= pbounds.h;
 619                         obj_bounds.y += pbounds.y;
 620                         obj_bounds.w *= pbounds.w;
 621                         obj_bounds.h *= pbounds.h;
 622
 623                         if (!m_use_gpu_transform)
 624                                 obj_bounds = TransformToViewCoords(obj_bounds);
 625                         GPUObjBounds gpu_bounds = {
 626                                 ClampFloat(obj_bounds.x),
 627                                 ClampFloat(obj_bounds.y),
 628                                 ClampFloat(obj_bounds.x + obj_bounds.w),
 629                                 ClampFloat(obj_bounds.y + obj_bounds.h)
 630                         };
 631                         obj_bounds_builder.Add(gpu_bounds);
 632                         //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());
 633
 634                         if (m_query_gpu_bounds_on_next_frame != NULL)
 635                         {
 636                                 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));
 637                         }
 638                 }
 639                 GPUObjBounds p_gpu_bounds = {
 640                                 ClampFloat(pbounds.x),
 641                                 ClampFloat(pbounds.y),
 642                                 ClampFloat(pbounds.x + pbounds.w),
 643                                 ClampFloat(pbounds.y + pbounds.h)
 644                 };
 645                 obj_bounds_builder.Add(p_gpu_bounds);
 646         }
 647         #endif
 648         if (m_query_gpu_bounds_on_next_frame != NULL)
 649         {
 650                 if (m_query_gpu_bounds_on_next_frame != stdout && m_query_gpu_bounds_on_next_frame != stderr)
 651                         fclose(m_query_gpu_bounds_on_next_frame);
 652                 m_query_gpu_bounds_on_next_frame = NULL;
 653         }
 654         m_objbounds_vbo.UnMap();
 655 }
 656 /**
 657  * Prepare the document for rendering
 658  * Will be called on View::Render if m_render_dirty is set
 659  * (Called at least once, on the first Render)
 660  */
 661 void View::PrepareRender()
 662 {
 663         PROFILE_SCOPE("View::PrepareRender()");
 664         Debug("Recreate buffers with %u objects", m_document.ObjectCount());
 665         // Prepare bounds vbo
 666         if (UsingGPURendering())
 667         {
 668                 m_bounds_ubo.Invalidate();
 669                 m_bounds_ubo.SetType(GraphicsBuffer::BufferTypeUniform);
 670                 m_bounds_ubo.SetUsage(GraphicsBuffer::BufferUsageStreamDraw);
 671                 m_bounds_ubo.SetName("m_bounds_ubo: Screen bounds.");
 672         }
 673
 674         // Instead of having each ObjectRenderer go through the whole document
 675         //  we initialise them, go through the document once adding to the appropriate Renderers
 676         //  and then finalise them
 677         // This will totally be efficient if we have like, a lot of distinct ObjectTypes. Which could totally happen. You never know.
 678
 679         // Prepare the buffers
 680         for (unsigned i = 0; i < m_object_renderers.size(); ++i)
 681         {
 682                 m_object_renderers[i]->PrepareBuffers(m_document.ObjectCount());
 683         }
 684
 685         // Add objects from Document to buffers
 686         for (unsigned id = 0; id < m_document.ObjectCount(); ++id)
 687         {
 688                 ObjectType type = m_document.m_objects.types[id];
 689                 m_object_renderers.at(type)->AddObjectToBuffers(id); // Use at() in case the document is corrupt TODO: Better error handling?
 690                 // (Also, Wow I just actually used std::vector::at())
 691                 // (Also, I just managed to make it throw an exception because I'm a moron)
 692                 //Debug("Object of type %d", type);
 693         }
 694
 695
 696         // Finish the buffers
 697         for (unsigned i = 0; i < m_object_renderers.size(); ++i)
 698         {
 699                 m_object_renderers[i]->FinaliseBuffers();
 700         }
 701         if (UsingGPURendering())
 702         {
 703                 dynamic_cast<BezierRenderer*>(m_object_renderers[BEZIER])->PrepareBezierGPUBuffer(m_document.m_objects);
 704         }
 705         m_render_dirty = false;
 706 }
 707
 708 void View::SaveCPUBMP(const char * filename)
 709 {
 710         bool prev = UsingGPURendering();
 711         SetGPURendering(false);
 712         Render(800, 600);
 713         ObjectRenderer::SaveBMP({m_cpu_rendering_pixels, 800, 600}, filename);
 714         SetGPURendering(prev);
 715 }
 716
 717 void View::SaveGPUBMP(const char * filename)
 718 {
 719         bool prev = UsingGPURendering();
 720         SetGPURendering(true);
 721         Render(800,600);
 722         m_screen.ScreenShot(filename);
 723         SetGPURendering(prev);
 724 }
 725
 726 void View::QueryGPUBounds(const char * filename, const char * mode)
 727 {
 728         m_query_gpu_bounds_on_next_frame = fopen(filename, mode);
 729         Debug("File: %s", filename);
 730         if (m_query_gpu_bounds_on_next_frame == NULL)
 731                 Error("Couldn't open file \"%s\" : %s", filename, strerror(errno));
 732         ForceBoundsDirty();
 733         ForceBufferDirty();
 734         ForceRenderDirty();
 735 }