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 #include "path.h"
   9 #include "transformationtype.h"
  10
  11 #define USE_GPU_TRANSFORM false
  12 #define USE_GPU_RENDERING true
  13 #define USE_SHADING !(USE_GPU_RENDERING) && true
  14
  15
  16 #include "gmprat.h"
  17
  18
  19 namespace IPDF
  20 {
  21         #ifdef TRANSFORM_BEZIERS_TO_PATH
  22                 typedef Gmprat VReal;
  23         #else
  24                 typedef Real VReal;
  25         #endif
  26         typedef TRect<VReal> VRect;
  27
  28         class Screen;
  29         /**
  30          * The View class manages a rectangular view into the document.
  31          * It is responsible for coordinate transforms and rendering the document.
  32          * ObjectRenderer's for each type of Object should be created in the constructor.
  33          */
  34         class View
  35         {
  36                 public:
  37                         View(Document & document, Screen & screen, const VRect & bounds = VRect(0,0,1,1), const Colour & colour = Colour(0.f,0.f,0.f,1.f));
  38                         virtual ~View();
  39
  40                         void Render(int width = 0, int height = 0);
  41
  42                         void Translate(Real x, Real y);
  43                         void ScaleAroundPoint(Real x, Real y, Real scale_amount);
  44                         void SetBounds(const Rect & new_bounds);
  45
  46                         Rect TransformToViewCoords(const Rect& inp) const;
  47
  48                         const VRect& GetBounds() const { return m_bounds; }
  49
  50
  51                         const bool UsingGPUTransform() const { return m_use_gpu_transform; } // whether view transform calculated on CPU or GPU
  52                         const bool UsingGPURendering() const { return m_use_gpu_rendering; } // whether GPU shaders are used or CPU rendering
  53                         void ToggleGPUTransform() { m_use_gpu_transform = (!m_use_gpu_transform); m_bounds_dirty = true; m_buffer_dirty = true; }
  54                         void ToggleGPURendering() { m_use_gpu_rendering = (!m_use_gpu_rendering); m_bounds_dirty = true; m_buffer_dirty = true; }
  55                         void SetGPUTransform(bool state) {m_use_gpu_transform = state; m_bounds_dirty = true; m_buffer_dirty = true;}
  56
  57                         void SetGPURendering(bool state) {m_use_gpu_rendering = state; m_bounds_dirty = true; m_buffer_dirty = true;}
  58
  59                         bool ShowingBezierBounds() const {return m_show_bezier_bounds;} // render bounds rectangles
  60                         void ShowBezierBounds(bool state) {m_show_bezier_bounds = state; m_bounds_dirty = true; m_buffer_dirty = true;}
  61                         bool ShowingBezierType() const {return m_show_bezier_type;}
  62                         void ShowBezierType(bool state) {m_show_bezier_type = state; m_bounds_dirty = true; m_buffer_dirty = true;}
  63                         bool ShowingFillPoints() const {return m_show_fill_points;}
  64                         void ShowFillPoints(bool state) {m_show_fill_points = state; m_bounds_dirty = true; m_buffer_dirty = true;}
  65                         bool ShowingFillBounds() const {return m_show_fill_bounds;}
  66                         void ShowFillBounds(bool state) {m_show_fill_bounds = true;}
  67
  68                         bool PerformingShading() const {return m_perform_shading;}
  69                         void PerformShading(bool state) {m_perform_shading = state; m_bounds_dirty = true; m_buffer_dirty = true;}
  70
  71                         void ForceBoundsDirty() {m_bounds_dirty = true;}
  72                         void ForceBufferDirty() {m_buffer_dirty = true;}
  73                         void ForceRenderDirty() {m_render_dirty = true;}
  74
  75                         void QueryGPUBounds(const char * filename, const char * mode="r");
  76
  77                         void SetLazyRendering(bool state = true) {m_lazy_rendering = state;}
  78                         bool UsingLazyRendering() const {return m_lazy_rendering;}
  79
  80                         void SaveBMP(const char * filename) {if (UsingGPURendering()) SaveGPUBMP(filename); else SaveCPUBMP(filename);}
  81
  82                         void SaveCPUBMP(const char * filename);
  83                         void SaveGPUBMP(const char * filename);
  84
  85                         Document & Doc() {return m_document;}
  86
  87                 private:
  88                         struct GPUObjBounds
  89                         {
  90                                 float x0, y0;
  91                                 float x1, y1;
  92                         } __attribute__((packed));
  93
  94
  95
  96                         void PrepareRender(); // call when m_render_dirty is true
  97                         void UpdateObjBoundsVBO(unsigned first_obj, unsigned last_obj); // call when m_buffer_dirty is true
  98
  99                         void RenderRange(int width, int height, unsigned first_obj, unsigned last_obj);
 100
 101                         bool m_use_gpu_transform;
 102                         bool m_use_gpu_rendering;
 103                         bool m_bounds_dirty; // the view bounds has changed (occurs when changing view)
 104                         bool m_buffer_dirty; // the object bounds have changed (also occurs when changing view, but only when not using GPU transforms)
 105                         bool m_render_dirty; // the document has changed (occurs when document first loaded)
 106                         Document & m_document;
 107                         Screen & m_screen;
 108                         FrameBuffer m_cached_display;
 109                         VRect m_bounds;
 110                         Colour m_colour;
 111
 112                         // Stores the view bounds.
 113                         GraphicsBuffer m_bounds_ubo; //bounds_dirty means this one has changed
 114                         // Stores the bounds for _all_ objects.
 115                         GraphicsBuffer m_objbounds_vbo; //buffer_dirty means this one has changed
 116
 117                         // ObjectRenderers to be initialised in constructor
 118                         // Trust me it will be easier to generalise things this way. Even though there are pointers.
 119                         std::vector<ObjectRenderer*> m_object_renderers;
 120                         uint8_t * m_cpu_rendering_pixels; // pixels to be used for CPU rendering
 121
 122
 123                         // shading
 124                         bool m_perform_shading;
 125
 126                         // Debug rendering
 127                         bool m_show_bezier_bounds;
 128                         bool m_show_bezier_type;
 129                         bool m_show_fill_points;
 130                         bool m_show_fill_bounds;
 131
 132                         bool m_lazy_rendering;// don't redraw frames unless we need to
 133
 134                         FILE * m_query_gpu_bounds_on_next_frame;
 135
 136
 137 #ifndef QUADTREE_DISABLED
 138                         QuadTreeIndex m_current_quadtree_node;  // The highest node we will traverse.
 139                         int m_quadtree_max_depth;               // The maximum quadtree depth.
 140                         void RenderQuadtreeNode(int width, int height, QuadTreeIndex node, int remaining_depth);
 141
 142 #endif
 143         };
 144 }
 145
 146 #endif //_VIEW_H