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 //#define TRANSFORM_OBJECTS_NOT_VIEW
  14
  15 namespace IPDF
  16 {
  17         class Screen;
  18         /**
  19          * The View class manages a rectangular view into the document.
  20          * It is responsible for coordinate transforms and rendering the document.
  21          * ObjectRenderer's for each type of Object should be created in the constructor.
  22          */
  23         class View
  24         {
  25                 public:
  26                         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));
  27                         virtual ~View();
  28
  29                         void Render(int width = 0, int height = 0);
  30
  31                         void Translate(Real x, Real y);
  32                         void ScaleAroundPoint(Real x, Real y, Real scale_amount);
  33                         void SetBounds(const Rect & new_bounds);
  34
  35                         Rect TransformToViewCoords(const Rect& inp) const;
  36
  37                         const Rect& GetBounds() const { return m_bounds; }
  38
  39
  40                         const bool UsingGPUTransform() const { return m_use_gpu_transform; } // whether view transform calculated on CPU or GPU
  41                         const bool UsingGPURendering() const { return m_use_gpu_rendering; } // whether GPU shaders are used or CPU rendering
  42                         void ToggleGPUTransform() { m_use_gpu_transform = (!m_use_gpu_transform); m_bounds_dirty = true; m_buffer_dirty = true; }
  43                         void ToggleGPURendering() { m_use_gpu_rendering = (!m_use_gpu_rendering); m_bounds_dirty = true; m_buffer_dirty = true; }
  44                         void SetGPUTransform(bool state) {m_use_gpu_transform = state; m_bounds_dirty = true; m_buffer_dirty = true;}
  45
  46                         void SetGPURendering(bool state) {m_use_gpu_rendering = state; m_bounds_dirty = true; m_buffer_dirty = true;}
  47
  48                         bool ShowingBezierBounds() const {return m_show_bezier_bounds;} // render bounds rectangles
  49                         void ShowBezierBounds(bool state) {m_show_bezier_bounds = state; m_bounds_dirty = true; m_buffer_dirty = true;}
  50                         bool ShowingBezierType() const {return m_show_bezier_type;}
  51                         void ShowBezierType(bool state) {m_show_bezier_type = state; m_bounds_dirty = true; m_buffer_dirty = true;}
  52                         bool ShowingFillPoints() const {return m_show_fill_points;}
  53                         void ShowFillPoints(bool state) {m_show_fill_points = state; m_bounds_dirty = true; m_buffer_dirty = true;}
  54                         bool ShowingFillBounds() const {return m_show_fill_bounds;}
  55                         void ShowFillBounds(bool state) {m_show_fill_bounds = true;}
  56
  57                         bool PerformingShading() const {return m_perform_shading;}
  58                         void PerformShading(bool state) {m_perform_shading = state; m_bounds_dirty = true; m_buffer_dirty = true;}
  59
  60                         void ForceBoundsDirty() {m_bounds_dirty = true;}
  61                         void ForceBufferDirty() {m_buffer_dirty = true;}
  62                         void ForceRenderDirty() {m_render_dirty = true;}
  63
  64                         void SetLazyRendering(bool state = true) {m_lazy_rendering = state;}
  65                         bool UsingLazyRendering() const {return m_lazy_rendering;}
  66
  67                         void SaveBMP(const char * filename) {if (UsingGPURendering()) SaveGPUBMP(filename); else SaveCPUBMP(filename);}
  68
  69                         void SaveCPUBMP(const char * filename);
  70                         void SaveGPUBMP(const char * filename);
  71
  72                 private:
  73                         struct GPUObjBounds
  74                         {
  75                                 float x0, y0;
  76                                 float x1, y1;
  77                         } __attribute__((packed));
  78
  79                         void PrepareRender(); // call when m_render_dirty is true
  80                         void UpdateObjBoundsVBO(unsigned first_obj, unsigned last_obj); // call when m_buffer_dirty is true
  81
  82                         void RenderRange(int width, int height, unsigned first_obj, unsigned last_obj);
  83
  84                         bool m_use_gpu_transform;
  85                         bool m_use_gpu_rendering;
  86                         bool m_bounds_dirty; // the view bounds has changed (occurs when changing view)
  87                         bool m_buffer_dirty; // the object bounds have changed (also occurs when changing view, but only when not using GPU transforms)
  88                         bool m_render_dirty; // the document has changed (occurs when document first loaded)
  89                         Document & m_document;
  90                         Screen & m_screen;
  91                         FrameBuffer m_cached_display;
  92                         Rect m_bounds;
  93                         Colour m_colour;
  94
  95                         // Stores the view bounds.
  96                         GraphicsBuffer m_bounds_ubo; //bounds_dirty means this one has changed
  97                         // Stores the bounds for _all_ objects.
  98                         GraphicsBuffer m_objbounds_vbo; //buffer_dirty means this one has changed
  99
 100                         // ObjectRenderers to be initialised in constructor
 101                         // Trust me it will be easier to generalise things this way. Even though there are pointers.
 102                         std::vector<ObjectRenderer*> m_object_renderers;
 103                         uint8_t * m_cpu_rendering_pixels; // pixels to be used for CPU rendering
 104
 105
 106                         // shading
 107                         bool m_perform_shading;
 108
 109                         // Debug rendering
 110                         bool m_show_bezier_bounds;
 111                         bool m_show_bezier_type;
 112                         bool m_show_fill_points;
 113                         bool m_show_fill_bounds;
 114
 115                         bool m_lazy_rendering;// don't redraw frames unless we need to
 116
 117
 118 #ifndef QUADTREE_DISABLED
 119                         QuadTreeIndex m_current_quadtree_node;  // The highest node we will traverse.
 120                         int m_quadtree_max_depth;               // The maximum quadtree depth.
 121                         void RenderQuadtreeNode(int width, int height, QuadTreeIndex node, int remaining_depth);
 122
 123 #endif
 124         };
 125 }
 126
 127 #endif //_VIEW_H