src/view.h

   1 #ifndef _VIEW_H
   2 #define _VIEW_H
   3
   4 #include "ipdf.h"
   5 #include "document.h"
   6 #include "framebuffer.h"
   7 #include "objectrenderer.h"
   8
   9 #define USE_GPU_TRANSFORM true
  10 #define USE_GPU_RENDERING true
  11 #define USE_SHADING !(USE_GPU_RENDERING) && true
  12
  13 namespace IPDF
  14 {
  15         class Screen;
  16         /**
  17          * The View class manages a rectangular view into the document.
  18          * It is responsible for coordinate transforms and rendering the document.
  19          * ObjectRenderer's for each type of Object should be created in the constructor.
  20          */
  21         class View
  22         {
  23                 public:
  24                         View(Document & document, Screen & screen, const Rect & bounds = Rect(0,0,1,1), const Colour & colour = Colour(0.f,0.f,0.f,1.f));
  25                         virtual ~View();
  26
  27                         void Render(int width = 0, int height = 0);
  28
  29                         void Translate(Real x, Real y);
  30                         void ScaleAroundPoint(Real x, Real y, Real scale_amount);
  31                         void SetBounds(const Rect & new_bounds);
  32
  33                         Rect TransformToViewCoords(const Rect& inp) const;
  34
  35                         const Rect& GetBounds() const { return m_bounds; }
  36
  37
  38                         const bool UsingGPUTransform() const { return m_use_gpu_transform; } // whether view transform calculated on CPU or GPU
  39                         const bool UsingGPURendering() const { return m_use_gpu_rendering; } // whether GPU shaders are used or CPU rendering
  40                         void ToggleGPUTransform() { m_use_gpu_transform = (!m_use_gpu_transform); m_bounds_dirty = true; m_buffer_dirty = true; }
  41                         void ToggleGPURendering() { m_use_gpu_rendering = (!m_use_gpu_rendering); m_bounds_dirty = true; m_buffer_dirty = true; }
  42
  43                         void SetGPURendering(bool state) {m_use_gpu_rendering = state; m_bounds_dirty = true; m_buffer_dirty = true;}
  44
  45                         bool ShowingBezierBounds() const {return m_show_bezier_bounds;} // render bounds rectangles
  46                         void ShowBezierBounds(bool state) {m_show_bezier_bounds = state; m_bounds_dirty = true; m_buffer_dirty = true;}
  47                         bool ShowingBezierType() const {return m_show_bezier_type;}
  48                         void ShowBezierType(bool state) {m_show_bezier_type = state; m_bounds_dirty = true; m_buffer_dirty = true;}
  49                         bool ShowingFillPoints() const {return m_show_fill_points;}
  50                         void ShowFillPoints(bool state) {m_show_fill_points = state; m_bounds_dirty = true; m_buffer_dirty = true;}
  51                         bool ShowingFillBounds() const {return m_show_fill_bounds;}
  52                         void ShowFillBounds(bool state) {m_show_fill_bounds = true;}
  53
  54                         bool PerformingShading() const {return m_perform_shading;}
  55                         void PerformShading(bool state) {m_perform_shading = state; m_bounds_dirty = true; m_buffer_dirty = true;}
  56
  57                         void ForceBoundsDirty() {m_bounds_dirty = true;}
  58                         void ForceBufferDirty() {m_buffer_dirty = true;}
  59                         void ForceRenderDirty() {m_render_dirty = true;}
  60
  61                 private:
  62                         struct GPUObjBounds
  63                         {
  64                                 float x0, y0;
  65                                 float x1, y1;
  66                         } __attribute__((packed));
  67
  68                         void PrepareRender(); // call when m_render_dirty is true
  69                         void UpdateObjBoundsVBO(unsigned first_obj, unsigned last_obj); // call when m_buffer_dirty is true
  70
  71                         void RenderRange(int width, int height, unsigned first_obj, unsigned last_obj);
  72
  73                         bool m_use_gpu_transform;
  74                         bool m_use_gpu_rendering;
  75                         bool m_bounds_dirty; // the view bounds has changed (occurs when changing view)
  76                         bool m_buffer_dirty; // the object bounds have changed (also occurs when changing view, but only when not using GPU transforms)
  77                         bool m_render_dirty; // the document has changed (occurs when document first loaded)
  78                         Document & m_document;
  79                         Screen & m_screen;
  80                         FrameBuffer m_cached_display;
  81                         Rect m_bounds;
  82                         Colour m_colour;
  83
  84                         // Stores the view bounds.
  85                         GraphicsBuffer m_bounds_ubo; //bounds_dirty means this one has changed
  86                         // Stores the bounds for _all_ objects.
  87                         GraphicsBuffer m_objbounds_vbo; //buffer_dirty means this one has changed
  88
  89                         // ObjectRenderers to be initialised in constructor
  90                         // Trust me it will be easier to generalise things this way. Even though there are pointers.
  91                         std::vector<ObjectRenderer*> m_object_renderers;
  92                         uint8_t * m_cpu_rendering_pixels; // pixels to be used for CPU rendering
  93
  94
  95                         // shading
  96                         bool m_perform_shading;
  97
  98                         // Debug rendering
  99                         bool m_show_bezier_bounds;
 100                         bool m_show_bezier_type;
 101                         bool m_show_fill_points;
 102                         bool m_show_fill_bounds;
 103
 104
 105 #ifndef QUADTREE_DISABLED
 106                         QuadTreeIndex m_current_quadtree_node;  // The highest node we will traverse.
 107                         int m_quadtree_max_depth;               // The maximum quadtree depth.
 108                         void RenderQuadtreeNode(int width, int height, QuadTreeIndex node, int remaining_depth);
 109
 110 #endif
 111         };
 112 }
 113
 114 #endif //_VIEW_H