src/view.cpp

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