src/writeablebitmap.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
   2 /*
   3  * writeablebitmap.cpp
   4  *
   5  * Contact:
   6  *   Moonlight List (moonlight-list@lists.ximian.com)
   7  *
   8  * Copyright 2007-2008 Novell, Inc. (http://www.novell.com)
   9  *
  10  * See the LICENSE file included with the distribution for details.
  11  *
  12  */
  13
  14 #include "runtime.h"
  15 #include "transform.h"
  16 #include "rect.h"
  17 #include "region.h"
  18 #include "panel.h"
  19 #include "writeablebitmap.h"
  20
  21 WriteableBitmap::WriteableBitmap ()
  22 {
  23         SetObjectType (Type::WRITEABLEBITMAP);
  24         pthread_mutex_init (&surface_mutex, NULL);
  25 }
  26
  27 gpointer
  28 WriteableBitmap::InitializeFromBitmapSource (BitmapSource *source)
  29 {
  30         cairo_t *cr;
  31
  32         if (!source)
  33                 return NULL;
  34
  35         SetPixelHeight (source->GetPixelHeight ());
  36         SetPixelWidth (source->GetPixelWidth ());
  37         SetPixelFormat (PixelFormatPbgra32);
  38
  39         image_surface = cairo_image_surface_create (GetPixelFormat () == PixelFormatBgr32 ? CAIRO_FORMAT_RGB24 : CAIRO_FORMAT_ARGB32, GetPixelWidth (), GetPixelHeight ());
  40         cr = cairo_create (image_surface);
  41         cairo_set_source_surface (cr, source->GetImageSurface (), 0, 0);
  42         cairo_paint (cr);
  43         cairo_destroy (cr);
  44
  45         SetBitmapData (cairo_image_surface_get_data (image_surface));
  46
  47         return GetBitmapData ();
  48 }
  49
  50 WriteableBitmap::~WriteableBitmap ()
  51 {
  52         pthread_mutex_destroy (&surface_mutex);
  53 }
  54
  55 void
  56 WriteableBitmap::Lock ()
  57 {
  58         pthread_mutex_lock (&surface_mutex);
  59 }
  60
  61 void
  62 WriteableBitmap::Unlock ()
  63 {
  64         pthread_mutex_unlock (&surface_mutex);
  65 }
  66
  67 cairo_surface_t *
  68 WriteableBitmap::GetSurface (cairo_t *cr)
  69 {
  70         return image_surface;
  71 }
  72
  73 void
  74 WriteableBitmap::Render (UIElement *element, Transform *transform)
  75 {
  76         cairo_t *cr;
  77         Region *region;
  78         Rect bounds;
  79
  80         if (!element)
  81                 return;
  82
  83         if (!GetSurface (NULL)) {
  84                 Invalidate ();
  85         }
  86
  87         cr = cairo_create (GetSurface (NULL));
  88
  89         // Region is the entire WB size
  90         region = new Region (Rect (0, 0, GetPixelWidth (), GetPixelHeight ()));
  91
  92         // FIXME is this supposed to clear the surface?
  93         cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
  94         cairo_paint (cr);
  95         cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
  96
  97         cairo_matrix_t xform;
  98         if (transform)
  99                 transform->GetTransform (&xform);
 100
 101         element->Paint (cr, region, &xform);
 102
 103         cairo_destroy (cr);
 104         cairo_surface_flush (image_surface);
 105 }