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         //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());
 169
 170
 171 }
 172
 173 /**
 174  * Transform a point in the document to a point relative to the top left corner of the view
 175  * This is the CPU coordinate transform code; used only if the CPU is doing coordinate transforms
 176  * @param inp - Input Rect {x,y,w,h} in the document
 177  * @returns output Rect {x,y,w,h} in the View
 178  */
 179 Rect View::TransformToViewCoords(const Rect& inp) const
 180 {
 181         #ifdef TRANSFORM_OBJECTS_NOT_VIEW
 182                 return inp;
 183         #endif
 184         return TransformRectCoordinates(m_bounds.Convert<Real>(), inp);
 185 }
 186
 187 /**
 188  * Render the view
 189  * Updates FrameBuffer if the document, object bounds, or view bounds have changed, then Blits it
 190  * Otherwise just Blits the cached FrameBuffer
 191  * @param width - Width of View to render
 192  * @param height - Height of View to render
 193  */
 194 void View::Render(int width, int height)
 195 {
 196         if (!m_screen.Valid()) return;
 197         glPushDebugGroup(GL_DEBUG_SOURCE_APPLICATION,42,-1, "Beginning View::Render()");
 198         // View dimensions have changed (ie: Window was resized)
 199         int prev_width = m_cached_display.GetWidth();
 200         int prev_height = m_cached_display.GetHeight();
 201         if (width != prev_width || height != prev_height)
 202         {
 203                 m_cached_display.Create(width, height);
 204                 m_bounds_dirty = true;
 205         }
 206
 207         // View bounds have not changed; blit the FrameBuffer as it is
 208         if (!m_bounds_dirty && m_lazy_rendering)
 209         {
 210                 m_cached_display.UnBind();
 211                 m_cached_display.Blit();
 212                 glPopDebugGroup();
 213                 return;
 214         }
 215         m_cached_display.Bind(); //NOTE: This is redundant; Clear already calls Bind
 216         m_cached_display.Clear();
 217
 218 #ifndef QUADTREE_DISABLED
 219         // I'm going to write this out in comments, so hopefully then I'll understand it. :/
 220         //
 221         // This code looks at the current bounds and tries to work out how they need to change
 222         // to keep the view looking at the correct quadtree node.
 223         //
 224         // The idea is that the width/height of the view bounds are always 0.5<=wh<=1.0. We then always
 225         // try to keep the bottom-right corner of the node on-screen, changing nodes to suit. Why bottom-right,
 226         // you may ask. It's an excellent question, with a dubious, hand-wavey answer: because we're manipulating
 227         // the bounds, it was easier to do it that way. (The top-left corner of the bounds are within the main
 228         // quadtree node).
 229         if (m_bounds_dirty || !m_lazy_rendering)
 230         {
 231                 // If we're too far zoomed out, become the parent of the current node.
 232                 if ( m_bounds.w > 1.0 || m_bounds.h > 1.0)
 233                 {
 234                         // If a parent node exists, we'll become it.
 235                         //TODO: Generate a new parent node if none exists, and work out when to change child_type
 236                         // away from QTC_UNKNOWN
 237                         if (m_document.GetQuadTree().nodes[m_current_quadtree_node].parent != QUADTREE_EMPTY)
 238                         {
 239                                 m_bounds = TransformFromQuadChild(m_bounds, m_document.GetQuadTree().nodes[m_current_quadtree_node].child_type);
 240                                 m_current_quadtree_node = m_document.GetQuadTree().nodes[m_current_quadtree_node].parent;
 241                         }
 242                 }
 243
 244                 // If we have a parent... (This prevents some crashes, but should disappear.)
 245                 if (m_document.GetQuadTree().nodes[m_current_quadtree_node].parent != QUADTREE_EMPTY)
 246                 {
 247                         // If the current node is off the left-hand side of the screen...
 248                         while (m_bounds.x > 1)
 249                         {
 250                                 //... the current node becomes the node to its right.
 251                                 m_bounds = Rect(m_bounds.x - 1, m_bounds.y, m_bounds.w, m_bounds.h);
 252                                 m_current_quadtree_node = m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, 1, 0, &m_document);
 253                         }
 254                         while (m_bounds.y > 1)
 255                         {
 256                                 m_bounds = Rect(m_bounds.x, m_bounds.y - 1, m_bounds.w, m_bounds.h);
 257                                 m_current_quadtree_node = m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, 0, 1, &m_document);
 258                         }
 259                         while (m_bounds.x < 0)
 260                         {
 261                                 m_bounds = Rect(m_bounds.x + 1, m_bounds.y, m_bounds.w, m_bounds.h);
 262                                 m_current_quadtree_node = m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, -1, 0, &m_document);
 263                         }
 264                         while (m_bounds.y < 0)
 265                         {
 266                                 m_bounds = Rect(m_bounds.x, m_bounds.y + 1, m_bounds.w, m_bounds.h);
 267                                 m_current_quadtree_node = m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, 0, -1, &m_document);
 268                         }
 269                 }
 270
 271                 // 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.)
 272                 if (ContainedInQuadChild(m_bounds, QTC_TOP_LEFT))
 273                 {
 274                         if (m_document.GetQuadTree().nodes[m_current_quadtree_node].top_left == QUADTREE_EMPTY)
 275                         {
 276                                 // We want to reparent into a child node, but none exist. Get the document to create one.
 277                                 m_document.GenQuadChild(m_current_quadtree_node, QTC_TOP_LEFT);
 278                                 m_render_dirty = true;
 279                         }
 280                         m_bounds = TransformToQuadChild(m_bounds, QTC_TOP_LEFT);
 281                         m_current_quadtree_node = m_document.GetQuadTree().nodes[m_current_quadtree_node].top_left;
 282                 }
 283                 if (ContainedInQuadChild(m_bounds, QTC_TOP_RIGHT))
 284                 {
 285                         if (m_document.GetQuadTree().nodes[m_current_quadtree_node].top_right == QUADTREE_EMPTY)
 286                         {
 287                                 // We want to reparent into a child node, but none exist. Get the document to create one.
 288                                 m_document.GenQuadChild(m_current_quadtree_node, QTC_TOP_RIGHT);
 289                                 m_render_dirty = true;
 290                         }
 291                         m_bounds = TransformToQuadChild(m_bounds, QTC_TOP_RIGHT);
 292                         m_current_quadtree_node = m_document.GetQuadTree().nodes[m_current_quadtree_node].top_right;
 293                 }
 294                 if (ContainedInQuadChild(m_bounds, QTC_BOTTOM_LEFT))
 295                 {
 296                         if (m_document.GetQuadTree().nodes[m_current_quadtree_node].bottom_left == QUADTREE_EMPTY)
 297                         {
 298                                 // We want to reparent into a child node, but none exist. Get the document to create one.
 299                                 m_document.GenQuadChild(m_current_quadtree_node, QTC_BOTTOM_LEFT);
 300                                 m_render_dirty = true;
 301                         }
 302                         m_bounds = TransformToQuadChild(m_bounds, QTC_BOTTOM_LEFT);
 303                         m_current_quadtree_node = m_document.GetQuadTree().nodes[m_current_quadtree_node].bottom_left;
 304                 }
 305                 if (ContainedInQuadChild(m_bounds, QTC_BOTTOM_RIGHT))
 306                 {
 307                         if (m_document.GetQuadTree().nodes[m_current_quadtree_node].bottom_right == QUADTREE_EMPTY)
 308                         {
 309                                 // We want to reparent into a child node, but none exist. Get the document to create one.
 310                                 m_document.GenQuadChild(m_current_quadtree_node, QTC_BOTTOM_RIGHT);
 311                                 m_render_dirty = true;
 312                         }
 313                         m_bounds = TransformToQuadChild(m_bounds, QTC_BOTTOM_RIGHT);
 314                         m_current_quadtree_node = m_document.GetQuadTree().nodes[m_current_quadtree_node].bottom_right;
 315                 }
 316
 317                 // Otherwise, we'll arbitrarily select the bottom-right.
 318                 // TODO: Perhaps select based on greatest area?
 319                 if (m_bounds.w < 0.5 || m_bounds.h < 0.5)
 320                 {
 321                         if (m_document.GetQuadTree().nodes[m_current_quadtree_node].bottom_right == QUADTREE_EMPTY)
 322                         {
 323                                 // We want to reparent into a child node, but none exist. Get the document to create one.
 324                                 m_document.GenQuadChild(m_current_quadtree_node, QTC_BOTTOM_RIGHT);
 325                                 m_render_dirty = true;
 326                         }
 327                         m_bounds = TransformToQuadChild(m_bounds, QTC_BOTTOM_RIGHT);
 328                         m_current_quadtree_node = m_document.GetQuadTree().nodes[m_current_quadtree_node].bottom_right;
 329                 }
 330         }
 331
 332         m_screen.DebugFontPrintF("Current View QuadTree");
 333         QuadTreeIndex overlay = m_current_quadtree_node;
 334         while (overlay != -1)
 335         {
 336                 m_screen.DebugFontPrintF(" Node: %d (objs: %d -> %d)", overlay, m_document.GetQuadTree().nodes[overlay].object_begin,
 337                                         m_document.GetQuadTree().nodes[overlay].object_end);
 338                 overlay = m_document.GetQuadTree().nodes[overlay].next_overlay;
 339         }
 340         m_screen.DebugFontPrintF("\n");
 341         m_screen.DebugFontPrintF("Left: %d, Right: %d, Up: %d, Down: %d\n",
 342                         m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, -1, 0, 0),
 343                         m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, 1, 0, 0),
 344                         m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, 0, -1, 0),
 345                         m_document.GetQuadTree().GetNeighbour(m_current_quadtree_node, 0, 1, 0));
 346
 347
 348         Rect view_top_bounds = m_bounds;
 349         QuadTreeIndex tmp = m_current_quadtree_node;
 350         while (tmp != -1)
 351         {
 352                 view_top_bounds = TransformFromQuadChild(view_top_bounds, m_document.GetQuadTree().nodes[tmp].child_type);
 353                 tmp = m_document.GetQuadTree().nodes[tmp].parent;
 354         }
 355         m_screen.DebugFontPrintF("Equivalent View Bounds: %s\n", view_top_bounds.Str().c_str());
 356 #endif
 357
 358         if (!m_use_gpu_rendering)
 359         {
 360                 // Dynamically resize CPU rendering target pixels if needed
 361                 if (m_cpu_rendering_pixels == NULL || width*height > prev_width*prev_height)
 362                 {
 363                         delete [] m_cpu_rendering_pixels;
 364                         m_cpu_rendering_pixels = new uint8_t[width*height*4];
 365                         if (m_cpu_rendering_pixels == NULL)
 366                                 Fatal("Could not allocate %d*%d*4 = %d bytes for cpu rendered pixels", width, height, width*height*4);
 367                 }
 368                 // Clear CPU rendering pixels
 369                 for (int i = 0; i < width*height*4; ++i)
 370                         m_cpu_rendering_pixels[i] = 255;
 371         }
 372 #ifdef QUADTREE_DISABLED
 373         RenderRange(width, height, 0, m_document.ObjectCount());
 374 #else
 375         RenderQuadtreeNode(width, height, m_current_quadtree_node, m_quadtree_max_depth);
 376 #endif
 377         if (!m_use_gpu_rendering)
 378         {
 379                 m_screen.RenderPixels(0,0,width, height, m_cpu_rendering_pixels); //TODO: Make this work :(
 380                 // Debug for great victory (do something similar for GPU and compare?)
 381                 //ObjectRenderer::SaveBMP({m_cpu_rendering_pixels, width, height}, "cpu_rendering_last_frame.bmp");
 382         }
 383         m_cached_display.UnBind(); // resets render target to the screen
 384         m_cached_display.Blit(); // blit FrameBuffer to screen
 385         m_buffer_dirty = false;
 386         glPopDebugGroup();
 387
 388 #ifndef CONTROLPANEL_DISABLED
 389         // The powers that be suggest that this may be causing of the segfaults.
 390         //ControlPanel::Update();
 391 #endif //CONTROLPANEL_DISABLED
 392         //Debug("Completed Render");
 393
 394 }
 395
 396 #ifndef QUADTREE_DISABLED
 397 void View::RenderQuadtreeNode(int width, int height, QuadTreeIndex node, int remaining_depth)
 398 {
 399         Rect old_bounds = m_bounds;
 400         if (node == QUADTREE_EMPTY) return;
 401         if (!remaining_depth) return;
 402         //Debug("Rendering QT node %d, (objs: %d -- %d)\n", node, m_document.GetQuadTree().nodes[node].object_begin, m_document.GetQuadTree().nodes[node].object_end);
 403         m_bounds_dirty = true;
 404         m_render_dirty = m_buffer_dirty = true;
 405         QuadTreeIndex overlay = node;
 406         while(overlay != -1)
 407         {
 408                 RenderRange(width, height, m_document.GetQuadTree().nodes[overlay].object_begin, m_document.GetQuadTree().nodes[overlay].object_end);
 409                 overlay = m_document.GetQuadTree().nodes[overlay].next_overlay;
 410         }
 411
 412         if (m_bounds.Intersects(Rect(1,1,1,1)))
 413         {
 414                 m_bounds = Rect(m_bounds.x - 1, m_bounds.y - 1, m_bounds.w, m_bounds.h);
 415                 m_bounds_dirty = true;
 416                 RenderQuadtreeNode(width, height, m_document.GetQuadTree().GetNeighbour(node, 1, 1, &m_document), remaining_depth - 1);
 417         }
 418         m_bounds = old_bounds;
 419         if (m_bounds.Intersects(Rect(1,0,1,1)))
 420         {
 421                 m_bounds = Rect(m_bounds.x - 1, m_bounds.y, m_bounds.w, m_bounds.h);
 422                 m_bounds_dirty = true;
 423                 RenderQuadtreeNode(width, height, m_document.GetQuadTree().GetNeighbour(node, 1, 0, &m_document), remaining_depth - 1);
 424         }
 425         m_bounds = old_bounds;
 426         if (m_bounds.Intersects(Rect(0,1,1,1)))
 427         {
 428                 m_bounds = Rect(m_bounds.x, m_bounds.y - 1, m_bounds.w, m_bounds.h);
 429                 m_bounds_dirty = true;
 430                 RenderQuadtreeNode(width, height, m_document.GetQuadTree().GetNeighbour(node, 0, 1, &m_document), remaining_depth - 1);
 431         }
 432         m_bounds = old_bounds;
 433         m_bounds_dirty = true;
 434
 435 #if 0
 436         m_bounds = TransformToQuadChild(old_bounds, QTC_TOP_LEFT);
 437         m_bounds_dirty = true;
 438         RenderQuadtreeNode(width, height, m_document.GetQuadTree().nodes[node].top_left, remaining_depth-1);
 439         m_bounds = TransformToQuadChild(old_bounds, QTC_TOP_RIGHT);
 440         m_bounds_dirty = true;
 441         RenderQuadtreeNode(width, height, m_document.GetQuadTree().nodes[node].top_right, remaining_depth-1);
 442         m_bounds = TransformToQuadChild(old_bounds, QTC_BOTTOM_LEFT);
 443         m_bounds_dirty = true;
 444         RenderQuadtreeNode(width, height, m_document.GetQuadTree().nodes[node].bottom_left, remaining_depth-1);
 445         m_bounds = TransformToQuadChild(old_bounds, QTC_BOTTOM_RIGHT);
 446         m_bounds_dirty = true;
 447         RenderQuadtreeNode(width, height, m_document.GetQuadTree().nodes[node].bottom_right, remaining_depth-1);
 448         m_bounds = old_bounds;
 449         m_bounds_dirty = true;
 450 #endif
 451 }
 452 #endif
 453
 454 void View::RenderRange(int width, int height, unsigned first_obj, unsigned last_obj)
 455 {
 456         glPushDebugGroup(GL_DEBUG_SOURCE_APPLICATION, 43, -1, "View::RenderRange()");
 457         if (m_render_dirty) // document has changed
 458                 PrepareRender();
 459
 460         if (m_buffer_dirty || m_bounds_dirty || !m_lazy_rendering) // object bounds have changed
 461         {
 462                 if (m_use_gpu_rendering)
 463                         UpdateObjBoundsVBO(first_obj, last_obj);
 464         }
 465
 466         if (m_use_gpu_transform)
 467         {
 468                 #ifdef TRANSFORM_OBJECTS_NOT_VIEW
 469                         //Debug("Transform objects, not view");
 470                                 GLfloat glbounds[] = {0.0f, 0.0f, 1.0f, 1.0f,
 471                                         0.0f, 0.0f, float(width), float(height)};
 472                 #else
 473                 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)),
 474                                         0.0, 0.0, static_cast<GLfloat>(width), static_cast<GLfloat>(height)};
 475                 #endif
 476                 m_bounds_ubo.Upload(sizeof(float)*8, glbounds);
 477         }
 478         else
 479         {
 480                 GLfloat glbounds[] = {0.0f, 0.0f, 1.0f, 1.0f,
 481                                         0.0f, 0.0f, float(width), float(height)};
 482                 m_bounds_ubo.Upload(sizeof(float)*8, glbounds);
 483         }
 484         m_bounds_dirty = false;
 485
 486
 487         // Render using GPU
 488         if (m_use_gpu_rendering)
 489         {
 490                 if (m_colour.a < 1.0f)
 491                 {
 492                         glEnable(GL_BLEND);
 493                         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 494                 }
 495                 m_objbounds_vbo.Bind();
 496                 m_bounds_ubo.Bind();
 497                 glEnableVertexAttribArray(0);
 498                 glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, 0);
 499
 500                 for (unsigned i = 0; i < m_object_renderers.size(); ++i)
 501                 {
 502                         m_object_renderers[i]->RenderUsingGPU(first_obj, last_obj);
 503                 }
 504
 505                 glDisableVertexAttribArray(0);
 506                 if (m_colour.a < 1.0f)
 507                 {
 508                         glDisable(GL_BLEND);
 509                 }
 510         }
 511         else // Rasterise on CPU then blit texture to GPU
 512         {
 513
 514                 for (unsigned i = 0; i < m_object_renderers.size(); ++i)
 515                 {
 516                         m_object_renderers[i]->RenderUsingCPU(m_document.m_objects, *this, {m_cpu_rendering_pixels, width, height}, first_obj, last_obj);
 517                 }
 518         }
 519         glPopDebugGroup();
 520 }
 521
 522 void View::UpdateObjBoundsVBO(unsigned first_obj, unsigned last_obj)
 523 {
 524         if (m_query_gpu_bounds_on_next_frame != NULL)
 525         {
 526                 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());
 527         }
 528
 529         //m_objbounds_vbo.Invalidate();
 530         m_objbounds_vbo.SetType(GraphicsBuffer::BufferTypeVertex);
 531         m_objbounds_vbo.SetName("Object Bounds VBO");
 532
 533         #ifndef TRANSFORM_OBJECTS_NOT_VIEW
 534         if (m_use_gpu_transform)
 535         {
 536                 m_objbounds_vbo.SetUsage(GraphicsBuffer::BufferUsageStaticDraw);
 537         }
 538         else
 539         #endif //TRANSFORM_OBJECTS_NOT_VIEW
 540         {
 541                 m_objbounds_vbo.SetUsage(GraphicsBuffer::BufferUsageDynamicCopy);
 542         }
 543         m_objbounds_vbo.Resize(m_document.ObjectCount()*sizeof(GPUObjBounds));
 544
 545         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());
 546
 547         #ifndef TRANSFORM_BEZIERS_TO_PATH
 548         for (unsigned id = first_obj; id < last_obj; ++id)
 549         {
 550                 Rect obj_bounds;
 551                 if (m_use_gpu_transform)
 552                 {
 553                         obj_bounds = m_document.m_objects.bounds[id];
 554                 }
 555                 else
 556                 {
 557                         obj_bounds = TransformToViewCoords(m_document.m_objects.bounds[id]);
 558                 }
 559                 GPUObjBounds gpu_bounds = {
 560                         Float(obj_bounds.x),
 561                         Float(obj_bounds.y),
 562                         Float(obj_bounds.x + obj_bounds.w),
 563                         Float(obj_bounds.y + obj_bounds.h)
 564                 };
 565
 566                 if (m_query_gpu_bounds_on_next_frame != NULL)
 567                 {
 568                         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));
 569                 }
 570
 571                 obj_bounds_builder.Add(gpu_bounds);
 572         }
 573         #else
 574         for (unsigned i = 0; i < m_document.m_objects.paths.size(); ++i)
 575         {
 576                 Path & path = m_document.m_objects.paths[i];
 577                 Rect & pbounds = path.GetBounds(m_document.m_objects); // Not very efficient...
 578                 //TODO: Add clipping here
 579                 //if (!pbounds.Intersects(Rect(0,0,1,1)) || pbounds.w < Real(1)/Real(800))
 580                 //      continue;
 581
 582                 for (unsigned id = path.m_start; id <= path.m_end; ++id)
 583                 {
 584                         if (id < first_obj || id >= last_obj)
 585                                 continue;
 586
 587                         Rect obj_bounds = m_document.m_objects.bounds[id];
 588
 589                         obj_bounds.x *= pbounds.w;
 590                         obj_bounds.x += pbounds.x;
 591                         obj_bounds.y *= pbounds.h;
 592                         obj_bounds.y += pbounds.y;
 593                         obj_bounds.w *= pbounds.w;
 594                         obj_bounds.h *= pbounds.h;
 595
 596                         if (!m_use_gpu_transform)
 597                                 obj_bounds = TransformToViewCoords(obj_bounds);
 598                         GPUObjBounds gpu_bounds = {
 599                                 ClampFloat(obj_bounds.x),
 600                                 ClampFloat(obj_bounds.y),
 601                                 ClampFloat(obj_bounds.x + obj_bounds.w),
 602                                 ClampFloat(obj_bounds.y + obj_bounds.h)
 603                         };
 604                         obj_bounds_builder.Add(gpu_bounds);
 605                         //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());
 606
 607                         if (m_query_gpu_bounds_on_next_frame != NULL)
 608                         {
 609                                 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));
 610                         }
 611                 }
 612                 GPUObjBounds p_gpu_bounds = {
 613                                 ClampFloat(pbounds.x),
 614                                 ClampFloat(pbounds.y),
 615                                 ClampFloat(pbounds.x + pbounds.w),
 616                                 ClampFloat(pbounds.y + pbounds.h)
 617                 };
 618                 obj_bounds_builder.Add(p_gpu_bounds);
 619         }
 620         #endif
 621         if (m_query_gpu_bounds_on_next_frame != NULL)
 622         {
 623                 if (m_query_gpu_bounds_on_next_frame != stdout && m_query_gpu_bounds_on_next_frame != stderr)
 624                         fclose(m_query_gpu_bounds_on_next_frame);
 625                 m_query_gpu_bounds_on_next_frame = NULL;
 626         }
 627         m_objbounds_vbo.UnMap();
 628 }
 629 /**
 630  * Prepare the document for rendering
 631  * Will be called on View::Render if m_render_dirty is set
 632  * (Called at least once, on the first Render)
 633  */
 634 void View::PrepareRender()
 635 {
 636         Debug("Recreate buffers with %u objects", m_document.ObjectCount());
 637         // Prepare bounds vbo
 638         if (UsingGPURendering())
 639         {
 640                 m_bounds_ubo.Invalidate();
 641                 m_bounds_ubo.SetType(GraphicsBuffer::BufferTypeUniform);
 642                 m_bounds_ubo.SetUsage(GraphicsBuffer::BufferUsageStreamDraw);
 643                 m_bounds_ubo.SetName("m_bounds_ubo: Screen bounds.");
 644         }
 645
 646         // Instead of having each ObjectRenderer go through the whole document
 647         //  we initialise them, go through the document once adding to the appropriate Renderers
 648         //  and then finalise them
 649         // This will totally be efficient if we have like, a lot of distinct ObjectTypes. Which could totally happen. You never know.
 650
 651         // Prepare the buffers
 652         for (unsigned i = 0; i < m_object_renderers.size(); ++i)
 653         {
 654                 m_object_renderers[i]->PrepareBuffers(m_document.ObjectCount());
 655         }
 656
 657         // Add objects from Document to buffers
 658         for (unsigned id = 0; id < m_document.ObjectCount(); ++id)
 659         {
 660                 ObjectType type = m_document.m_objects.types[id];
 661                 m_object_renderers.at(type)->AddObjectToBuffers(id); // Use at() in case the document is corrupt TODO: Better error handling?
 662                 // (Also, Wow I just actually used std::vector::at())
 663                 // (Also, I just managed to make it throw an exception because I'm a moron)
 664                 //Debug("Object of type %d", type);
 665         }
 666
 667
 668         // Finish the buffers
 669         for (unsigned i = 0; i < m_object_renderers.size(); ++i)
 670         {
 671                 m_object_renderers[i]->FinaliseBuffers();
 672         }
 673         if (UsingGPURendering())
 674         {
 675                 dynamic_cast<BezierRenderer*>(m_object_renderers[BEZIER])->PrepareBezierGPUBuffer(m_document.m_objects);
 676         }
 677         m_render_dirty = false;
 678 }
 679
 680 void View::SaveCPUBMP(const char * filename)
 681 {
 682         bool prev = UsingGPURendering();
 683         SetGPURendering(false);
 684         Render(800, 600);
 685         ObjectRenderer::SaveBMP({m_cpu_rendering_pixels, 800, 600}, filename);
 686         SetGPURendering(prev);
 687 }
 688
 689 void View::SaveGPUBMP(const char * filename)
 690 {
 691         bool prev = UsingGPURendering();
 692         SetGPURendering(true);
 693         Render(800,600);
 694         m_screen.ScreenShot(filename);
 695         SetGPURendering(prev);
 696 }
 697
 698 void View::QueryGPUBounds(const char * filename, const char * mode)
 699 {
 700         m_query_gpu_bounds_on_next_frame = fopen(filename, mode);
 701         Debug("File: %s", filename);
 702         if (m_query_gpu_bounds_on_next_frame == NULL)
 703                 Error("Couldn't open file \"%s\" : %s", filename, strerror(errno));
 704         ForceBoundsDirty();
 705         ForceBufferDirty();
 706         ForceRenderDirty();
 707 }