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         //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());
 171
 172
 173 }
 174
 175 /**
 176  * Transform a point in the document to a point relative to the top left corner of the view
 177  * This is the CPU coordinate transform code; used only if the CPU is doing coordinate transforms
 178  * @param inp - Input Rect {x,y,w,h} in the document
 179  * @returns output Rect {x,y,w,h} in the View
 180  */
 181 Rect View::TransformToViewCoords(const Rect& inp) const
 182 {
 183         #ifdef TRANSFORM_OBJECTS_NOT_VIEW
 184                 return inp;
 185         #endif
 186         return TransformRectCoordinates(m_bounds.Convert<Real>(), inp);
 187 }
 188
 189 /**
 190  * Render the view
 191  * Updates FrameBuffer if the document, object bounds, or view bounds have changed, then Blits it
 192  * Otherwise just Blits the cached FrameBuffer
 193  * @param width - Width of View to render
 194  * @param height - Height of View to render
 195  */
 196 void View::Render(int width, int height)
 197 {
 198         PROFILE_SCOPE("View::Render()");
 199         if (!m_screen.Valid()) return;
 200         glPushDebugGroup(GL_DEBUG_SOURCE_APPLICATION,42,-1, "Beginning View::Render()");
 201         // View dimensions have changed (ie: Window was resized)
 202         int prev_width = m_cached_display.GetWidth();
 203         int prev_height = m_cached_display.GetHeight();
 204         if (width != prev_width || height != prev_height)
 205         {
 206                 m_cached_display.Create(width, height);
 207                 m_bounds_dirty = true;
 208         }
 209
 210         // View bounds have not changed; blit the FrameBuffer as it is
 211         if (!m_bounds_dirty && m_lazy_rendering)
 212         {
 213                 m_cached_display.UnBind();
 214                 m_cached_display.Blit();
 215                 glPopDebugGroup();
 216                 return;
 217         }
 218         m_cached_display.Bind(); //NOTE: This is redundant; Clear already calls Bind
 219         m_cached_display.Clear();
 220
 221 #ifndef QUADTREE_DISABLED
 222         // I'm going to write this out in comments, so hopefully then I'll understand it. :/
 223         //
 224         // This code looks at the current bounds and tries to work out how they need to change
 225         // to keep the view looking at the correct quadtree node.
 226         //
 227         // The idea is that the width/height of the view bounds are always 0.5<=wh<=1.0. We then always
 228         // try to keep the bottom-right corner of the node on-screen, changing nodes to suit. Why bottom-right,
 229         // you may ask. It's an excellent question, with a dubious, hand-wavey answer: because we're manipulating
 230         // the bounds, it was easier to do it that way. (The top-left corner of the bounds are within the main
 231         // quadtree node).
 232         if (m_bounds_dirty || !m_lazy_rendering)
 233         {
 234                 g_profiler.BeginZone("View::Render -- Quadtree view bounds management");
 235                 // If we're too far zoomed out, become the parent of the current node.
 236                 while ( m_bounds.w > 1.0 || m_bounds.h > 1.0)
 237                 {
 238                         // If a parent node exists, we'll become it.
 239                         //TODO: Generate a new parent node if none exists, and work out when to change child_type
 240                         // away from QTC_UNKNOWN
 241                         if (m_document.GetQuadTree().nodes[m_current_quadtree_node].parent != QUADTREE_EMPTY)
 242                         {
 243                                 m_bounds = TransformFromQuadChild(m_bounds, m_document.GetQuadTree().nodes[m_current_quadtree_node].child_type);
 244                                 m_current_quadtree_node = m_document.GetQuadTree().nodes[m_current_quadtree_node].parent;
 245                         }
 246                         else break;
 247                 }
 248
 249                 // If we have a parent... (This prevents some crashes, but should disappear.)
 250                 if (m_document.GetQuadTree().nodes[m_current_quadtree_node].parent != QUADTREE_EMPTY)
 251                 {
 252                         // If the current node is off the left-hand side of the screen...
 253                         while (m_bounds.x > 1)
 254                         {
 255                                 //... the current node becomes the node to its right.
 256                                 m_bounds = Rect(m_bounds.x - 1, m_bounds.y, m_bounds.w, m_bounds.h);
 257                                 m_current_quadtree_node = m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, 1, 0, &m_document);
 258                         }
 259                         while (m_bounds.y > 1)
 260                         {
 261                                 m_bounds = Rect(m_bounds.x, m_bounds.y - 1, m_bounds.w, m_bounds.h);
 262                                 m_current_quadtree_node = m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, 0, 1, &m_document);
 263                         }
 264                         while (m_bounds.x < 0)
 265                         {
 266                                 m_bounds = Rect(m_bounds.x + 1, m_bounds.y, m_bounds.w, m_bounds.h);
 267                                 m_current_quadtree_node = m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, -1, 0, &m_document);
 268                         }
 269                         while (m_bounds.y < 0)
 270                         {
 271                                 m_bounds = Rect(m_bounds.x, m_bounds.y + 1, m_bounds.w, m_bounds.h);
 272                                 m_current_quadtree_node = m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, 0, -1, &m_document);
 273                         }
 274                 }
 275
 276                 // 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.)
 277                 if (ContainedInQuadChild(m_bounds, QTC_TOP_LEFT))
 278                 {
 279                         if (m_document.GetQuadTree().nodes[m_current_quadtree_node].top_left == QUADTREE_EMPTY)
 280                         {
 281                                 // We want to reparent into a child node, but none exist. Get the document to create one.
 282                                 m_document.GenQuadChild(m_current_quadtree_node, QTC_TOP_LEFT);
 283                                 m_render_dirty = true;
 284                         }
 285                         m_bounds = TransformToQuadChild(m_bounds, QTC_TOP_LEFT);
 286                         m_current_quadtree_node = m_document.GetQuadTree().nodes[m_current_quadtree_node].top_left;
 287                 }
 288                 if (ContainedInQuadChild(m_bounds, QTC_TOP_RIGHT))
 289                 {
 290                         if (m_document.GetQuadTree().nodes[m_current_quadtree_node].top_right == QUADTREE_EMPTY)
 291                         {
 292                                 // We want to reparent into a child node, but none exist. Get the document to create one.
 293                                 m_document.GenQuadChild(m_current_quadtree_node, QTC_TOP_RIGHT);
 294                                 m_render_dirty = true;
 295                         }
 296                         m_bounds = TransformToQuadChild(m_bounds, QTC_TOP_RIGHT);
 297                         m_current_quadtree_node = m_document.GetQuadTree().nodes[m_current_quadtree_node].top_right;
 298                 }
 299                 if (ContainedInQuadChild(m_bounds, QTC_BOTTOM_LEFT))
 300                 {
 301                         if (m_document.GetQuadTree().nodes[m_current_quadtree_node].bottom_left == QUADTREE_EMPTY)
 302                         {
 303                                 // We want to reparent into a child node, but none exist. Get the document to create one.
 304                                 m_document.GenQuadChild(m_current_quadtree_node, QTC_BOTTOM_LEFT);
 305                                 m_render_dirty = true;
 306                         }
 307                         m_bounds = TransformToQuadChild(m_bounds, QTC_BOTTOM_LEFT);
 308                         m_current_quadtree_node = m_document.GetQuadTree().nodes[m_current_quadtree_node].bottom_left;
 309                 }
 310                 if (ContainedInQuadChild(m_bounds, QTC_BOTTOM_RIGHT))
 311                 {
 312                         if (m_document.GetQuadTree().nodes[m_current_quadtree_node].bottom_right == QUADTREE_EMPTY)
 313                         {
 314                                 // We want to reparent into a child node, but none exist. Get the document to create one.
 315                                 m_document.GenQuadChild(m_current_quadtree_node, QTC_BOTTOM_RIGHT);
 316                                 m_render_dirty = true;
 317                         }
 318                         m_bounds = TransformToQuadChild(m_bounds, QTC_BOTTOM_RIGHT);
 319                         m_current_quadtree_node = m_document.GetQuadTree().nodes[m_current_quadtree_node].bottom_right;
 320                 }
 321
 322                 // Otherwise, we'll arbitrarily select the bottom-right.
 323                 // TODO: Perhaps select based on greatest area?
 324                 while (m_bounds.w < 0.5 || m_bounds.h < 0.5)
 325                 {
 326                         if (m_document.GetQuadTree().nodes[m_current_quadtree_node].bottom_right == QUADTREE_EMPTY)
 327                         {
 328                                 // We want to reparent into a child node, but none exist. Get the document to create one.
 329                                 m_document.GenQuadChild(m_current_quadtree_node, QTC_BOTTOM_RIGHT);
 330                                 m_render_dirty = true;
 331                         }
 332                         m_bounds = TransformToQuadChild(m_bounds, QTC_BOTTOM_RIGHT);
 333                         m_current_quadtree_node = m_document.GetQuadTree().nodes[m_current_quadtree_node].bottom_right;
 334                 }
 335                 g_profiler.EndZone();
 336         }
 337
 338         m_screen.DebugFontPrintF("Current View QuadTree");
 339         QuadTreeIndex overlay = m_current_quadtree_node;
 340         while (overlay != -1)
 341         {
 342                 m_screen.DebugFontPrintF(" Node: %d (objs: %d -> %d)", overlay, m_document.GetQuadTree().nodes[overlay].object_begin,
 343                                         m_document.GetQuadTree().nodes[overlay].object_end);
 344                 overlay = m_document.GetQuadTree().nodes[overlay].next_overlay;
 345         }
 346         m_screen.DebugFontPrintF("\n");
 347         m_screen.DebugFontPrintF("Left: %d, Right: %d, Up: %d, Down: %d\n",
 348                         m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, -1, 0, 0),
 349                         m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, 1, 0, 0),
 350                         m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, 0, -1, 0),
 351                         m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, 0, 1, 0));
 352
 353
 354         Rect view_top_bounds = m_bounds;
 355         QuadTreeIndex tmp = m_current_quadtree_node;
 356         while (tmp != -1)
 357         {
 358                 view_top_bounds = TransformFromQuadChild(view_top_bounds, m_document.GetQuadTree().nodes[tmp].child_type);
 359                 tmp = m_document.GetQuadTree().nodes[tmp].parent;
 360         }
 361         m_screen.DebugFontPrintF("Equivalent View Bounds: %s\n", view_top_bounds.Str().c_str());
 362 #endif
 363
 364         if (!m_use_gpu_rendering)
 365         {
 366                 // Dynamically resize CPU rendering target pixels if needed
 367                 if (m_cpu_rendering_pixels == NULL || width*height > prev_width*prev_height)
 368                 {
 369                         delete [] m_cpu_rendering_pixels;
 370                         m_cpu_rendering_pixels = new uint8_t[width*height*4];
 371                         if (m_cpu_rendering_pixels == NULL)
 372                                 Fatal("Could not allocate %d*%d*4 = %d bytes for cpu rendered pixels", width, height, width*height*4);
 373                 }
 374                 // Clear CPU rendering pixels
 375                 for (int i = 0; i < width*height*4; ++i)
 376                         m_cpu_rendering_pixels[i] = 255;
 377         }
 378 #ifdef QUADTREE_DISABLED
 379         RenderRange(width, height, 0, m_document.ObjectCount());
 380 #else
 381         // Make sure we update the gpu buffers properly.
 382         if (m_document.m_document_dirty)
 383         {
 384                 m_render_dirty = m_buffer_dirty = true;
 385                 m_document.m_document_dirty = false;
 386         }
 387         RenderQuadtreeNode(width, height, m_current_quadtree_node, m_quadtree_max_depth);
 388 #endif
 389         if (!m_use_gpu_rendering)
 390         {
 391                 m_screen.RenderPixels(0,0,width, height, m_cpu_rendering_pixels); //TODO: Make this work :(
 392                 // Debug for great victory (do something similar for GPU and compare?)
 393                 //ObjectRenderer::SaveBMP({m_cpu_rendering_pixels, width, height}, "cpu_rendering_last_frame.bmp");
 394         }
 395         m_cached_display.UnBind(); // resets render target to the screen
 396         m_cached_display.Blit(); // blit FrameBuffer to screen
 397         m_buffer_dirty = false;
 398         glPopDebugGroup();
 399
 400 #ifndef CONTROLPANEL_DISABLED
 401         // The powers that be suggest that this may be causing of the segfaults.
 402         //ControlPanel::Update();
 403 #endif //CONTROLPANEL_DISABLED
 404         //Debug("Completed Render");
 405
 406 }
 407
 408 #ifndef QUADTREE_DISABLED
 409 void View::RenderQuadtreeNode(int width, int height, QuadTreeIndex node, int remaining_depth)
 410 {
 411         Rect old_bounds = m_bounds;
 412         if (node == QUADTREE_EMPTY) return;
 413         if (!remaining_depth) return;
 414         m_bounds_dirty = true;
 415         QuadTreeIndex overlay = node;
 416         while(overlay != -1)
 417         {
 418                 //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);
 419                 if (m_document.GetQuadTree().nodes[overlay].render_dirty)
 420                         m_buffer_dirty = m_render_dirty = true;
 421                 RenderRange(width, height, m_document.GetQuadTree().nodes[overlay].object_begin, m_document.GetQuadTree().nodes[overlay].object_end);
 422                 const_cast<bool&>(m_document.GetQuadTree().nodes[overlay].render_dirty) = false;
 423                 overlay = m_document.GetQuadTree().nodes[overlay].next_overlay;
 424         }
 425
 426         if (m_bounds.Intersects(Rect(1,1,1,1)))
 427         {
 428                 m_bounds = Rect(m_bounds.x - 1, m_bounds.y - 1, m_bounds.w, m_bounds.h);
 429                 m_bounds_dirty = true;
 430                 RenderQuadtreeNode(width, height, m_document.GetQuadTree().GetNeighbour(node, 1, 1, &m_document), remaining_depth - 1);
 431         }
 432         m_bounds = old_bounds;
 433         if (m_bounds.Intersects(Rect(1,0,1,1)))
 434         {
 435                 m_bounds = Rect(m_bounds.x - 1, m_bounds.y, m_bounds.w, m_bounds.h);
 436                 m_bounds_dirty = true;
 437                 RenderQuadtreeNode(width, height, m_document.GetQuadTree().GetNeighbour(node, 1, 0, &m_document), remaining_depth - 1);
 438         }
 439         m_bounds = old_bounds;
 440         if (m_bounds.Intersects(Rect(0,1,1,1)))
 441         {
 442                 m_bounds = Rect(m_bounds.x, m_bounds.y - 1, m_bounds.w, m_bounds.h);
 443                 m_bounds_dirty = true;
 444                 RenderQuadtreeNode(width, height, m_document.GetQuadTree().GetNeighbour(node, 0, 1, &m_document), remaining_depth - 1);
 445         }
 446         m_bounds = old_bounds;
 447         m_bounds_dirty = true;
 448
 449 #if 0
 450         m_bounds = TransformToQuadChild(old_bounds, QTC_TOP_LEFT);
 451         m_bounds_dirty = true;
 452         RenderQuadtreeNode(width, height, m_document.GetQuadTree().nodes[node].top_left, remaining_depth-1);
 453         m_bounds = TransformToQuadChild(old_bounds, QTC_TOP_RIGHT);
 454         m_bounds_dirty = true;
 455         RenderQuadtreeNode(width, height, m_document.GetQuadTree().nodes[node].top_right, remaining_depth-1);
 456         m_bounds = TransformToQuadChild(old_bounds, QTC_BOTTOM_LEFT);
 457         m_bounds_dirty = true;
 458         RenderQuadtreeNode(width, height, m_document.GetQuadTree().nodes[node].bottom_left, remaining_depth-1);
 459         m_bounds = TransformToQuadChild(old_bounds, QTC_BOTTOM_RIGHT);
 460         m_bounds_dirty = true;
 461         RenderQuadtreeNode(width, height, m_document.GetQuadTree().nodes[node].bottom_right, remaining_depth-1);
 462         m_bounds = old_bounds;
 463         m_bounds_dirty = true;
 464 #endif
 465 }
 466 #endif
 467
 468 void View::RenderRange(int width, int height, unsigned first_obj, unsigned last_obj)
 469 {
 470         // We don't want to render an empty range,
 471         // so don't waste time setting up everything.
 472         if (first_obj == last_obj) return;
 473         PROFILE_SCOPE("View::RenderRange");
 474         glPushDebugGroup(GL_DEBUG_SOURCE_APPLICATION, 43, -1, "View::RenderRange()");
 475         if (m_render_dirty) // document has changed
 476                 PrepareRender();
 477
 478
 479         if (m_buffer_dirty || m_bounds_dirty || !m_lazy_rendering) // object bounds have changed
 480         {
 481                 if (m_use_gpu_rendering)
 482                         UpdateObjBoundsVBO(first_obj, last_obj);
 483         }
 484
 485
 486         // Render using GPU
 487         if (m_use_gpu_rendering)
 488         {
 489
 490                 if (m_use_gpu_transform)
 491                 {
 492                         #ifdef TRANSFORM_OBJECTS_NOT_VIEW
 493                                 //Debug("Transform objects, not view");
 494                                         GLfloat glbounds[] = {0.0f, 0.0f, 1.0f, 1.0f,
 495                                                 0.0f, 0.0f, float(width), float(height)};
 496                         #else
 497                         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)),
 498                                                 0.0, 0.0, static_cast<GLfloat>(width), static_cast<GLfloat>(height)};
 499                         #endif
 500                         m_bounds_ubo.Upload(sizeof(float)*8, glbounds);
 501                 }
 502                 else
 503                 {
 504                         GLfloat glbounds[] = {0.0f, 0.0f, 1.0f, 1.0f,
 505                                                 0.0f, 0.0f, float(width), float(height)};
 506                         m_bounds_ubo.Upload(sizeof(float)*8, glbounds);
 507                 }
 508                 m_bounds_dirty = false;
 509
 510                 if (m_colour.a < 1.0f)
 511                 {
 512                         glEnable(GL_BLEND);
 513                         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 514                 }
 515                 m_objbounds_vbo.Bind();
 516                 m_bounds_ubo.Bind();
 517                 glEnableVertexAttribArray(0);
 518                 glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, 0);
 519
 520                 for (unsigned i = 0; i < m_object_renderers.size(); ++i)
 521                 {
 522                         m_object_renderers[i]->RenderUsingGPU(first_obj, last_obj);
 523                 }
 524
 525                 glDisableVertexAttribArray(0);
 526                 if (m_colour.a < 1.0f)
 527                 {
 528                         glDisable(GL_BLEND);
 529                 }
 530         }
 531         else // Rasterise on CPU then blit texture to GPU
 532         {
 533
 534                 for (unsigned i = 0; i < m_object_renderers.size(); ++i)
 535                 {
 536                         m_object_renderers[i]->RenderUsingCPU(m_document.m_objects, *this, {m_cpu_rendering_pixels, width, height}, first_obj, last_obj);
 537                 }
 538         }
 539         glPopDebugGroup();
 540 }
 541
 542 void View::UpdateObjBoundsVBO(unsigned first_obj, unsigned last_obj)
 543 {
 544         PROFILE_SCOPE("View::UpdateObjBoundsVBO");
 545         if (m_query_gpu_bounds_on_next_frame != NULL)
 546         {
 547                 fprintf(m_query_gpu_bounds_on_next_frame,"# View: %s\t%s\t%s\t%s", Str(m_bounds.x).c_str(), Str(m_bounds.y).c_str(), Str(m_bounds.w).c_str(), Str(m_bounds.h).c_str());
 548         }
 549
 550         //m_objbounds_vbo.Invalidate();
 551         m_objbounds_vbo.SetType(GraphicsBuffer::BufferTypeVertex);
 552         m_objbounds_vbo.SetName("Object Bounds VBO");
 553
 554         #ifndef TRANSFORM_OBJECTS_NOT_VIEW
 555         if (m_use_gpu_transform)
 556         {
 557                 m_objbounds_vbo.SetUsage(GraphicsBuffer::BufferUsageStaticDraw);
 558         }
 559         else
 560         #endif //TRANSFORM_OBJECTS_NOT_VIEW
 561         {
 562                 m_objbounds_vbo.SetUsage(GraphicsBuffer::BufferUsageDynamicCopy);
 563         }
 564         m_objbounds_vbo.Resize(m_document.ObjectCount()*sizeof(GPUObjBounds));
 565
 566         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());
 567
 568         #ifndef TRANSFORM_BEZIERS_TO_PATH
 569         for (unsigned id = first_obj; id < last_obj; ++id)
 570         {
 571                 Rect obj_bounds;
 572                 if (m_use_gpu_transform)
 573                 {
 574                         obj_bounds = m_document.m_objects.bounds[id];
 575                 }
 576                 else
 577                 {
 578                         obj_bounds = TransformToViewCoords(m_document.m_objects.bounds[id]);
 579                 }
 580                 GPUObjBounds gpu_bounds = {
 581                         Float(obj_bounds.x),
 582                         Float(obj_bounds.y),
 583                         Float(obj_bounds.x + obj_bounds.w),
 584                         Float(obj_bounds.y + obj_bounds.h)
 585                 };
 586
 587                 if (m_query_gpu_bounds_on_next_frame != NULL)
 588                 {
 589                         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));
 590                 }
 591
 592                 obj_bounds_builder.Add(gpu_bounds);
 593         }
 594         #else
 595         for (unsigned i = 0; i < m_document.m_objects.paths.size(); ++i)
 596         {
 597                 Path & path = m_document.m_objects.paths[i];
 598                 Rect & pbounds = path.GetBounds(m_document.m_objects); // Not very efficient...
 599                 //TODO: Add clipping here
 600                 //if (!pbounds.Intersects(Rect(0,0,1,1)) || pbounds.w < Real(1)/Real(800))
 601                 //      continue;
 602
 603                 for (unsigned id = path.m_start; id <= path.m_end; ++id)
 604                 {
 605                         if (id < first_obj || id >= last_obj)
 606                                 continue;
 607
 608                         Rect obj_bounds = m_document.m_objects.bounds[id];
 609
 610                         obj_bounds.x *= pbounds.w;
 611                         obj_bounds.x += pbounds.x;
 612                         obj_bounds.y *= pbounds.h;
 613                         obj_bounds.y += pbounds.y;
 614                         obj_bounds.w *= pbounds.w;
 615                         obj_bounds.h *= pbounds.h;
 616
 617                         if (!m_use_gpu_transform)
 618                                 obj_bounds = TransformToViewCoords(obj_bounds);
 619                         GPUObjBounds gpu_bounds = {
 620                                 ClampFloat(obj_bounds.x),
 621                                 ClampFloat(obj_bounds.y),
 622                                 ClampFloat(obj_bounds.x + obj_bounds.w),
 623                                 ClampFloat(obj_bounds.y + obj_bounds.h)
 624                         };
 625                         obj_bounds_builder.Add(gpu_bounds);
 626                         //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());
 627
 628                         if (m_query_gpu_bounds_on_next_frame != NULL)
 629                         {
 630                                 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));
 631                         }
 632                 }
 633                 GPUObjBounds p_gpu_bounds = {
 634                                 ClampFloat(pbounds.x),
 635                                 ClampFloat(pbounds.y),
 636                                 ClampFloat(pbounds.x + pbounds.w),
 637                                 ClampFloat(pbounds.y + pbounds.h)
 638                 };
 639                 obj_bounds_builder.Add(p_gpu_bounds);
 640         }
 641         #endif
 642         if (m_query_gpu_bounds_on_next_frame != NULL)
 643         {
 644                 if (m_query_gpu_bounds_on_next_frame != stdout && m_query_gpu_bounds_on_next_frame != stderr)
 645                         fclose(m_query_gpu_bounds_on_next_frame);
 646                 m_query_gpu_bounds_on_next_frame = NULL;
 647         }
 648         m_objbounds_vbo.UnMap();
 649 }
 650 /**
 651  * Prepare the document for rendering
 652  * Will be called on View::Render if m_render_dirty is set
 653  * (Called at least once, on the first Render)
 654  */
 655 void View::PrepareRender()
 656 {
 657         PROFILE_SCOPE("View::PrepareRender()");
 658         Debug("Recreate buffers with %u objects", m_document.ObjectCount());
 659         // Prepare bounds vbo
 660         if (UsingGPURendering())
 661         {
 662                 m_bounds_ubo.Invalidate();
 663                 m_bounds_ubo.SetType(GraphicsBuffer::BufferTypeUniform);
 664                 m_bounds_ubo.SetUsage(GraphicsBuffer::BufferUsageStreamDraw);
 665                 m_bounds_ubo.SetName("m_bounds_ubo: Screen bounds.");
 666         }
 667
 668         // Instead of having each ObjectRenderer go through the whole document
 669         //  we initialise them, go through the document once adding to the appropriate Renderers
 670         //  and then finalise them
 671         // This will totally be efficient if we have like, a lot of distinct ObjectTypes. Which could totally happen. You never know.
 672
 673         // Prepare the buffers
 674         for (unsigned i = 0; i < m_object_renderers.size(); ++i)
 675         {
 676                 m_object_renderers[i]->PrepareBuffers(m_document.ObjectCount());
 677         }
 678
 679         // Add objects from Document to buffers
 680         for (unsigned id = 0; id < m_document.ObjectCount(); ++id)
 681         {
 682                 ObjectType type = m_document.m_objects.types[id];
 683                 m_object_renderers.at(type)->AddObjectToBuffers(id); // Use at() in case the document is corrupt TODO: Better error handling?
 684                 // (Also, Wow I just actually used std::vector::at())
 685                 // (Also, I just managed to make it throw an exception because I'm a moron)
 686                 //Debug("Object of type %d", type);
 687         }
 688
 689
 690         // Finish the buffers
 691         for (unsigned i = 0; i < m_object_renderers.size(); ++i)
 692         {
 693                 m_object_renderers[i]->FinaliseBuffers();
 694         }
 695         if (UsingGPURendering())
 696         {
 697                 dynamic_cast<BezierRenderer*>(m_object_renderers[BEZIER])->PrepareBezierGPUBuffer(m_document.m_objects);
 698         }
 699         m_render_dirty = false;
 700 }
 701
 702 void View::SaveCPUBMP(const char * filename)
 703 {
 704         bool prev = UsingGPURendering();
 705         SetGPURendering(false);
 706         Render(800, 600);
 707         ObjectRenderer::SaveBMP({m_cpu_rendering_pixels, 800, 600}, filename);
 708         SetGPURendering(prev);
 709 }
 710
 711 void View::SaveGPUBMP(const char * filename)
 712 {
 713         bool prev = UsingGPURendering();
 714         SetGPURendering(true);
 715         Render(800,600);
 716         m_screen.ScreenShot(filename);
 717         SetGPURendering(prev);
 718 }
 719
 720 void View::QueryGPUBounds(const char * filename, const char * mode)
 721 {
 722         m_query_gpu_bounds_on_next_frame = fopen(filename, mode);
 723         Debug("File: %s", filename);
 724         if (m_query_gpu_bounds_on_next_frame == NULL)
 725                 Error("Couldn't open file \"%s\" : %s", filename, strerror(errno));
 726         ForceBoundsDirty();
 727         ForceBufferDirty();
 728         ForceRenderDirty();
 729 }