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