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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "ui/gfx/image/cairo_cached_surface.h" |
| 6 |
| 7 #include <gtk/gtk.h> |
| 8 |
| 9 #include "base/basictypes.h" |
| 10 #include "base/logging.h" |
| 11 |
| 12 namespace gfx { |
| 13 |
| 14 CairoCachedSurface::CairoCachedSurface() : pixbuf_(NULL) { |
| 15 } |
| 16 |
| 17 CairoCachedSurface::~CairoCachedSurface() { |
| 18 Reset(); |
| 19 } |
| 20 |
| 21 void CairoCachedSurface::Reset() { |
| 22 for (SurfaceVector::iterator it = surface_map_.begin(); |
| 23 it != surface_map_.end(); ++it) { |
| 24 cairo_surface_destroy(it->second); |
| 25 } |
| 26 surface_map_.clear(); |
| 27 |
| 28 if (pixbuf_) { |
| 29 g_object_unref(pixbuf_); |
| 30 pixbuf_ = NULL; |
| 31 } |
| 32 } |
| 33 |
| 34 int CairoCachedSurface::Width() const { |
| 35 return pixbuf_ ? gdk_pixbuf_get_width(pixbuf_) : -1; |
| 36 } |
| 37 |
| 38 int CairoCachedSurface::Height() const { |
| 39 return pixbuf_ ? gdk_pixbuf_get_height(pixbuf_) : -1; |
| 40 } |
| 41 |
| 42 void CairoCachedSurface::UsePixbuf(GdkPixbuf* pixbuf) { |
| 43 if (pixbuf) |
| 44 g_object_ref(pixbuf); |
| 45 |
| 46 Reset(); |
| 47 |
| 48 pixbuf_ = pixbuf; |
| 49 } |
| 50 |
| 51 void CairoCachedSurface::SetSource(cairo_t* cr, GtkWidget* widget, |
| 52 int x, int y) const { |
| 53 SetSource(cr, gtk_widget_get_display(widget), x, y); |
| 54 } |
| 55 |
| 56 void CairoCachedSurface::SetSource(cairo_t* cr, GdkDisplay* display, |
| 57 int x, int y) const { |
| 58 DCHECK(pixbuf_); |
| 59 DCHECK(cr); |
| 60 DCHECK(display); |
| 61 |
| 62 cairo_surface_t* surface = GetSurfaceFor(cr, display); |
| 63 cairo_set_source_surface(cr, surface, x, y); |
| 64 } |
| 65 |
| 66 void CairoCachedSurface::MaskSource(cairo_t* cr, GtkWidget* widget, |
| 67 int x, int y) const { |
| 68 MaskSource(cr, gtk_widget_get_display(widget), x, y); |
| 69 } |
| 70 |
| 71 void CairoCachedSurface::MaskSource(cairo_t* cr, GdkDisplay* display, |
| 72 int x, int y) const { |
| 73 DCHECK(pixbuf_); |
| 74 DCHECK(cr); |
| 75 DCHECK(display); |
| 76 |
| 77 cairo_surface_t* surface = GetSurfaceFor(cr, display); |
| 78 cairo_mask_surface(cr, surface, x, y); |
| 79 } |
| 80 |
| 81 cairo_surface_t* CairoCachedSurface::GetSurfaceFor(cairo_t* cr, |
| 82 GdkDisplay* display) const { |
| 83 for (SurfaceVector::const_iterator it = surface_map_.begin(); |
| 84 it != surface_map_.end(); ++it) { |
| 85 if (display == it->first) { |
| 86 return it->second; |
| 87 } |
| 88 } |
| 89 |
| 90 // First time here since last UsePixbuf call. Generate the surface. |
| 91 cairo_surface_t* target = cairo_get_target(cr); |
| 92 cairo_surface_t* out = cairo_surface_create_similar( |
| 93 target, |
| 94 CAIRO_CONTENT_COLOR_ALPHA, |
| 95 gdk_pixbuf_get_width(pixbuf_), |
| 96 gdk_pixbuf_get_height(pixbuf_)); |
| 97 |
| 98 DCHECK(out); |
| 99 |
| 100 cairo_t* copy_cr = cairo_create(out); |
| 101 gdk_cairo_set_source_pixbuf(copy_cr, pixbuf_, 0, 0); |
| 102 cairo_paint(copy_cr); |
| 103 cairo_destroy(copy_cr); |
| 104 |
| 105 surface_map_.push_back(std::make_pair(display, out)); |
| 106 return out; |
| 107 } |
| 108 |
| 109 } // namespace gfx |
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