src/libs/icon/IconRenderer.h

   1 /*
   2  * Copyright 2006-2007, Haiku.
   3  * Distributed under the terms of the MIT License.
   4  *
   5  * Authors:
   6  *              Stephan Aßmus <superstippi@gmx.de>
   7  */
   8 #ifndef ICON_RENDERER_H
   9 #define ICON_RENDERER_H
  10
  11
  12 #include <agg_gamma_lut.h>
  13 #include <agg_pixfmt_rgba.h>
  14 #include <agg_rasterizer_compound_aa.h>
  15 #include <agg_rendering_buffer.h>
  16 #include <agg_renderer_scanline.h>
  17 #include <agg_scanline_bin.h>
  18 #include <agg_scanline_u.h>
  19 #include <agg_span_allocator.h>
  20 #include <agg_trans_affine.h>
  21
  22 #include "IconBuild.h"
  23
  24
  25 class BBitmap;
  26 class BRect;
  27
  28
  29 _BEGIN_ICON_NAMESPACE
  30
  31
  32 class Icon;
  33
  34 typedef agg::gamma_lut
  35                         <agg::int8u, agg::int8u>                GammaTable;
  36
  37 typedef agg::rendering_buffer                           RenderingBuffer;
  38 typedef agg::pixfmt_bgra32                                      PixelFormat;
  39 typedef agg::pixfmt_bgra32_pre                          PixelFormatPre;
  40 typedef agg::renderer_base<PixelFormat>         BaseRenderer;
  41 typedef agg::renderer_base<PixelFormatPre>      BaseRendererPre;
  42
  43 typedef agg::scanline_u8                                        Scanline;
  44 typedef agg::scanline_bin                                       BinaryScanline;
  45 typedef agg::span_allocator<agg::rgba8>         SpanAllocator;
  46 typedef agg::rasterizer_compound_aa
  47                         <agg::rasterizer_sl_clip_dbl>   CompoundRasterizer;
  48
  49 typedef agg::trans_affine                                       Transformation;
  50
  51 class IconRenderer {
  52  public:
  53                                                                 IconRenderer(BBitmap* bitmap);
  54         virtual                                         ~IconRenderer();
  55
  56                         void                            SetIcon(const Icon* icon);
  57
  58                         void                            Render();
  59                         void                            Render(const BRect& area);
  60
  61                         void                            SetScale(double scale);
  62                         void                            SetBackground(const BBitmap* background);
  63                                                                         // background is not copied,
  64                                                                         // ownership stays with the caller
  65                                                                         // colorspace and size need to
  66                                                                         // be the same as bitmap passed
  67                                                                         // to constructor
  68                         void                            SetBackground(const agg::rgba8& color);
  69                                                                         // used when no background bitmap
  70                                                                         // is set
  71
  72                         const _ICON_NAMESPACE GammaTable& GammaTable() const
  73                                                                         { return fGammaTable; }
  74
  75                         void                            Demultiply();
  76
  77  private:
  78                 class StyleHandler;
  79
  80                         void                            _Render(const BRect& area);
  81                         void                            _CommitRenderPass(StyleHandler& styleHandler,
  82                                                                         bool reset = true);
  83
  84                         BBitmap*                        fBitmap;
  85                         const BBitmap*          fBackground;
  86                         agg::rgba8                      fBackgroundColor;
  87                         const Icon*                     fIcon;
  88
  89                         _ICON_NAMESPACE GammaTable fGammaTable;
  90
  91                         RenderingBuffer         fRenderingBuffer;
  92                         PixelFormat                     fPixelFormat;
  93                         PixelFormatPre          fPixelFormatPre;
  94                         BaseRenderer            fBaseRenderer;
  95                         BaseRendererPre         fBaseRendererPre;
  96
  97                         Scanline                        fScanline;
  98                         BinaryScanline          fBinaryScanline;
  99                         SpanAllocator           fSpanAllocator;
 100
 101                         CompoundRasterizer      fRasterizer;
 102
 103                         Transformation          fGlobalTransform;
 104 };
 105
 106
 107 _END_ICON_NAMESPACE
 108
 109
 110 #endif // ICON_RENDERER_H